Zeitschriftenartikel: „Finishing machining methods“

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Lukovics, Imrich, und Jiří Čop. „Finishing Methods of Tools Functional Surfaces“. Key Engineering Materials 581 (Oktober 2013): 18–21. http://dx.doi.org/10.4028/www.scientific.net/kem.581.18.

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Article shows the calculation of the stress in a rotating disc and the possibility of using proprietary forms of instruments for speed grinding. It presents the results of speed and efficient cutting tools in machining these materials alloyed with chromium. In addition, it notes the results of the influence of technological conditions on the quality of surfaces, the residual stress in the workpiece, resulting from the machining speed and the influence of technological conditions on the wear of grinding wheels. Finally, some options for the use of finishing techniques in practice are mentioned.

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Świercz, Rafał, und Dorota Oniszczuk-Świercz. „Abrasive flow machining of nickel based super-alloys“. Mechanik 90, Nr. 10 (09.10.2017): 888–90. http://dx.doi.org/10.17814/mechanik.2017.10.137.

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Abrasive flow machining (AFM) is one of the unconventional methods of finishing surface. The material is removed by the flow of pressurized abrasive paste between the machined surfaces. The use of a flexible tool allows for finishing surfaces with complex geometry. The article presents results of experimental investigation on finishing surface topography of nickel-based super-alloys. Samples were pre-treated by electro discharge machining. The results of the study indicate the possibility of significant reduction of surface roughness after EDM with AFM finishing.

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Bartos, Rastislav, und Augustin Gorog. „DETERMINATION OF PARAMETER Ra FOR THE METHODS OF FINISHING MACHINING“. MM Science Journal 2013, Nr. 02 (04.06.2013): 401–3. http://dx.doi.org/10.17973/mmsj.2013_06_201307.

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Liao, Yu Song, und Jiang Han. „Research on Semi-Finishing of NC Milling“. Key Engineering Materials 693 (Mai 2016): 872–77. http://dx.doi.org/10.4028/www.scientific.net/kem.693.872.

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Usually, bigger diameter milling tools were firstly applied in rough machining of NC Milling for improving efficiency and reducing cost before semi-finishing. In order to make the surface of parts more smooth and get accurate dimension parameters and proper shape, it is necessary to select appropriate tools to carry out the finishing of NC Milling. Moreover, higher precision dimension or shapes of parts can be achieve by the method of the semi-finishing, which it can be carried out after rough machining of high efficiency. Currently, the main methods of semi-finishing include semi-finishing of using IPW and semi-finishing of using reference tool.

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Sajgalik, Michal, Tatiana Czanova, Lucia Zauskova, Mario Drbul, Marek Sadilek und Jan Valicek. „Triaxial analysis of residual stress in surface layers after high feed machining using X-ray diffractometer“. MATEC Web of Conferences 157 (2018): 07012. http://dx.doi.org/10.1051/matecconf/201815707012.

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Continuously increasing of productivity is main cause of finding of new ways and methods of machining. High feed machining (HFM) is one of methods of high-productivity machining developed to achieve higher metal removal rates and decrease machining time. Each machining or treatment operation introduces residual stress into the material and its surface layers. Roughing methods of machining generate tensile residual stress obviously. Tensile character of residual stress is not suitable for functional properties of produced parts. In some cases, finishing methods of machining can improve residual stress to suitable character. New detection method of residual stress by applying of x-ray diffraction allows to measure residual stress as triaxial tensor and distribution of residual stress. When we know analyse the residual stress thoroughly, we can design right finishing method and so improve the character of residual stress. This article is focused on analysing given measuring method of residual stress in triaxial direction and next possibilities of their eventual improvement.

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Bu, Xiao Fei, Hu Lin und Long Chen. „Smooth Cutting Operation Strategy for High Finishing Machining“. Advanced Materials Research 875-877 (Februar 2014): 896–900. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.896.

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High finishing machining tool path generation methods are usually adopted for five-axis computer numerically controlled machining of sculptured surface parts. The quality of the high finishing machining has an important effect on that of the surface. In this paper, a high finishing machining tool path generation method is introduced to generate an optimal tool path. The initial tool path is firstly created based on the constant scallop height, then the derived tool paths are generated as a kind of the diagonal curve by the initial tool path, and at last, the tool path smoothing algorithm is applied to the generated tool path. This path algorithm can ensure higher level of smooth of the surface been machined. Finally, the results of simulation and experiment of the machining process are given to verify the smooth and applicability of the proposed method.

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Dąbrowski, Tomasz, Dariusz Kurczyński, Piotr Łagowski und Michał Warianek. „The influence of the brake pad surface machining and finishing on its friction performance- examined by inertia brake dynamometr testing“. AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, Nr. 6 (30.06.2018): 399–404. http://dx.doi.org/10.24136/atest.2018.101.

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The article describes the influence of brake pads surface machining and finishing on their friction characteristics. It shows the methods of machining and finishing of the brake pads surface and their influence on noise emission and performance. It shows the brake dynamometer test results obtained on three brake pads which have three different types of surface modification and their detailed analysis and comparison.

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Hnátík, Jan, Luboš Kroft und Katerina Bícová. „The Influence of Finishing Strategy on the Quality of Surface“. Materials Science Forum 919 (April 2018): 18–24. http://dx.doi.org/10.4028/www.scientific.net/msf.919.18.

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The present contribution focuses on finishing operations in machining. Finishing operations belong to the most time-consuming and surface quality-critical machining tasks. High-quality tools are available nowadays for choosing optimal tool paths for finishing. Yet, the finishing options for general shaped surfaces are still severely limited. Although CAM systems can efficiently generate tool paths, none of them offers the combination of finishing tool paths, modern productive methods and adaptive tool paths. Increasing the productivity while maintaining dimensional accuracy and the quality of finished surfaces is the key point in finishing. One of the ways to improving productivity is the use of constant cutting speed. The aim of this article is to present experimental verification of these assumptions and demonstrate the impact on the quality of the finished surface

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Montazerolghaem, Hamid, und Esmaeil Soltani. „Design an Apparatus for Obtaining to High Precision Surface of Miniature Parts Based on Magnetized Abrasive Grains Finishing Process“. Key Engineering Materials 504-506 (Februar 2012): 1377–82. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.1377.

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Obtaining to high quality surfaces of industrial parts is an important manner for manufacturing involves. Different finishing process are capable to providing the require surface roughness in most cases, considering that, in some special parts, depending on shape, material and dimension of parts, the prevalent methods are limited, especially in finishing of sculptural and curvilinear surfaces. In this research, a new applied apparatus is represented based on magnetized abrasive grains finishing process. In this way, abrasive grains gathering around a rotational cylindrical tool thanks to a permanent magnetic field and work-piece, which usually is a formed thin metal sheet, located on a rotary table. Therefore, coinciding of those motions providing the require machining forces for finishing of surface without any physical contact between tool and work-piece. Presented process may carry out dry and wet in case of changing the main machining parameters such as: material and size of abrasive grains, tool and work-piece surface gap distance, tool and/or table rotational speed (r.p.m) and work-piece material. The recommended process has remarkable advantages such as: non-contact surface finishing, high finishing of non-flat surfaces, no need to clamping for work-piece because of low machining forces, responsibility for finishing of a wide range of materials except magnetizable parts, low machining costs and easy set up. This method has a lot of applications in production of optical lens, orthopedic prosthetic components and jewellery. For approve of the designed apparatus advantages, relative to other existed MR fluid machining system, some samples of very thin complex formed sheet have been successfully polished.

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Iwai, Manabu, und Kiyoshi Suzuki. „Surface Finishing of Electrically Conductive Diamond Tools by Electrolytic Machining“. Advanced Materials Research 565 (September 2012): 400–405. http://dx.doi.org/10.4028/www.scientific.net/amr.565.400.

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This paper deals with a new surface finishing method of electrically conductive diamond materials by making efficient use of an electrically conductive nature of the workpiece material, instead of conventional methods such as grinding, lapping and polishing using diamond abrasives. The authors focused on the electrolytic machining method and not on the electro discharge machining method for the two advantageous features of the electrolytic machining in addition to the general view that a better surface roughness could be obtained. One of those features is that no higher heat is generated at the machining point. This can eliminate a risk of the film delamination in the case where a workpiece is the CVD diamond coated tool. The other is that a wider machining gap is available between an electrode and a workpiece. This was thought to allow the electrolytic machining to be applied to a tool with a complex shape such as a drill and an endmill. Based on these concepts, electrolytic machining experiments were conducted on the electrically conductive diamond materials. From the results, it was found that the surface of the electrically conductive diamond could be smoothened enough by electrolytic machining though relatively long period of time was required.

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Bartoš, Rastislav, und Augustín Görög. „Methodology of the Experiment for Determination of Parameter Ra for the Methods of Finishing Machining“. Applied Mechanics and Materials 423-426 (September 2013): 871–75. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.871.

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Paper presents an analysis of possible relationships to calculate the roughness parameters Ra finishing with rotating parts. Based on the selection of variables involved, wanted variables and factors to establish differential equation. The equation contains in addition of the factors also the constant, which must be established experimentally. For this case, it is appropriate to use the method of planned experiment, which would be extended to a new method for determining of various mathematical relations for Ra. The presented methodology can be applied to the determination of Ra with other methods of finishing machining, especially with the grinding.

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Yin, Liang, Wei Min Zhang, Yong Yan und Zhi Jing Zhang. „Study of Electrochemical Finishing with High-Frequency Group Pulse“. Applied Mechanics and Materials 44-47 (Dezember 2010): 1656–60. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1656.

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The methods and mechanisms of electrochemical finishing with high-frequency group pulse was studied. With the high-frequency group pulse power designed, an equipment with high precision and easy operation was designed. In the experiment, The influence of power frequency, machining voltage, machining gap and so on to the result was analyzed. With some orthogonal experiments, we obtained the best combination of process parameters, from the Ra value of 2Cr13 stainless steel surface.

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Salguero, Jorge, Julia Gerez, Moisés Batista, J. Enrique Garófano und Mariano Marcos Bárcena. „A Study of Macrogeometrical Deviations in the Dry Turning of UNS R56400 Ti Alloy“. Applied Mechanics and Materials 152-154 (Januar 2012): 613–17. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.613.

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The UNS R56400 is a Titanium alloy commonly used in the aircraft industry. This alloy can be processed by machining depending on its final application. Drilling and turning are the most usual machining processes for working this alloy. Aerospace requirements involve high quality levels and, if possible, an on-line monitoring in order to preserve the workpiece design conditions. The machining process can be monitored by different methods. One of the most single methods involves the analysis of the finishing quality of the workpieces. This analysis is usually related to micro and macro geometrical considerations. In this paper a study of the finishing quality of dry turned UNS R56400 Ti alloy has been achieved. This study has been carried out based on the analysis of straightness and parallelism deviations as functions of cutting parameters, such as feed and cutting speed.

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Sukhochev, Gennady A., Vasiliy N. Sokolnikov und Andrey M. Nekrylov. „Influence of Contact Efforts on the Surface Quality of Difficult Profile under Finishing Hardening Machining“. Solid State Phenomena 316 (April 2021): 738–44. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.738.

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This work presents the research and development data in the field of finishing and hardening processes for parts with complicated shape surface. The comparable effectiveness of different surface finishing and hardening processes were studied, and intensification possibilities of processes of vibration finishing - hardening machining of narrow ducts by means of combined methods with metal anodic dissolution were shown. The results of experimental researches of influence of extrusion conditions of granular media on the surface layer quality are presented.

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Bańkowski, D., und S. Spadło. „The Aplication of Vibro – Abrasive Machining for Smoothing of Castings“. Archives of Foundry Engineering 17, Nr. 1 (01.03.2017): 169–73. http://dx.doi.org/10.1515/afe-2017-0031.

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Abstract The paper presents the production problems related to casting using precision casting methods. The essential adverse effect of the casting process is the presence of burrs understood as oversize material necessary to remove the next finishing operations. In addition, the surfaces of the cast often characterized by a porous structure. One of the methods to improve the smoothness of the area proposed by the authors is the use of vibro-abrasive finishing. This type of treatment is widely used in the treatment of finishing small objects as well as complex shapes. Objects in the form of casting in the first step was treated with aggressive deburring polyester matrix abrasive media. The second stage was polishing, with using smoothing porcelain media. The study evaluated the effect of vibro-abrasive machining typical cast on the basic parameters of the geometric structure of the surface. Observations using optical microscope Nicon Eclipse MA 200 compared changes in surface microstructure and the effect of deburring. Clearly we can say that vibro-abrasive machining an effective way of reducing the size of burrs, smoothing and lightening the surface of objects made by casting.

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Wu, Shiming. „Abrasive Jet Machining of Brittle Ceramics Yields Smoother Surfaces than Conventional Finishing Methods“. MRS Bulletin 27, Nr. 7 (Juli 2002): 489–90. http://dx.doi.org/10.1557/mrs2002.157.

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Gupta, Kapil. „Modern Manufacturing of Miniature Gears“. Solid State Phenomena 287 (Februar 2019): 35–39. http://dx.doi.org/10.4028/www.scientific.net/ssp.287.35.

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This paper explains and demonstrates how miniature gears of excellent surface quality can be manufactured by modern machining methods. Necessity of gear finishing by post processes such as grinding, lapping, honing etc. is the major limitation of all conventional methods of miniature gear manufacturing. To overcome this limitation, modern machining methods such as wire-EDM, abrasive waterjet machining, and laser beam machining etc. have been explored. It resulted in significant achievements in geometric accuracy, surface finish, and integrity of miniature gears. Using modern machining methods, it is possible to manufacture gears equipped with precision finish (average roughness 1 μm), high geometric accuracy (DIN quality 5), and defect-free tooth surfaces at significantly low cost. This paper aims to facilitate researchers by providing information on important aspects as regards to the manufacturing of miniature gears by modern machining methods and hopes research and development in this area to establish the field further.

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Полетаев, В., V. Poletaev, Е. Цветков und E. Tsvetkov. „Profile and contour grinding of compressor blade butts“. Science intensive technologies in mechanical engineering 1, Nr. 1 (31.01.2016): 15–19. http://dx.doi.org/10.12737/17317.

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The existing technologies of production of compressor blade butts related with traditional machining methods, including broaching and milling. Application of these machining methods requires further superfinishing operations to ensure the required quality of compressor blades. The automated highly-productive grinding of blade butts is an effective method to improve performance and quality of blade production. The technologies of profile and contour grinding of blades of a rotor and a compressor stator provide an automated machining of the outer parts contour in the same coordinate system, implement machining based on 3-D models of theoretical blade surfaces, ensure the required quality parameters of the part surface layer without additional finishing operations.

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Ruszaj, Adam, Mariusz Cygnar und Marcin Grabowski. „Abrasive machining process supported by electrochemical dissolution and electrical discharges – state of the art and directions of development“. Mechanik 92, Nr. 10 (07.10.2019): 652–54. http://dx.doi.org/10.17814/mechanik.2019.10.85.

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For finishing machining parts made of alloyed steels, composite or ceramic materials hybrid methods as abrasive machining supported by electrochemical dissolution or/and electrical discharges are often applied. The range of these processes practical applications in industry significantly increases. Because of this fact in the paper results of investigations and examples of practical applications of the mentioned hybrid abrasive processes are presented.

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Nowacka, Agnieszka, und Tomasz Klepka. „The application of polymers as abrasive media in abrasive flow machining“. Mechanik 92, Nr. 4 (08.04.2019): 234–37. http://dx.doi.org/10.17814/mechanik.2019.4.32.

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The characteristics of the products’ treatment by the abrasive flow machining (AFM) makes it an appropriate method of finishing the surface with complex geometry, e.g. holes or channels. Traditional methods of machining cause difficulties in obtaining a homogeneous roughness during finishing complicated shapes due to uneven distribution of abrasive forces. Due to the high price of abrasive media, not every user can afford for using it for processing. In the frame of the research, the novelty abrasive media has been developed to improve the surface roughness of the elements of polymer products. The use of viscoelastic polymers as a media of flow abrasive machining was discussed. Moreover, it is suggested to modify the quantity and size of abrasive grains filling the abrasive media in order to increase the value of the grain pressure force on the machined surface and to obtain an even surface of complex holes in AFM process.

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Cukanov, Ivan. „Technological improvement of the durability of internal screw surfaces“. Science intensive technologies in mechanical engineering 2021, Nr. 9 (13.09.2021): 19–25. http://dx.doi.org/10.30987/2223-4608-2021-9-19-25.

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The methods and some ways of technological improvement of the durability of internal screw surfaces are given. To increase the durability, finishing and strengthening machining with surface plastic deformation and threading with a cutter of a variable average diameter are proposed. The dependences for the specification of machining modes and the results of experimental studies of the screw surface quality parameters and wear resistance of running nuts are given.

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Burek, Jan, Robert Babiarz, Jarosław Buk, Paweł Sułkowicz und Krzysztof Krupa. „The Accuracy of Finishing WEDM of Inconel 718 Turbine Disc Fir Tree Slots“. Materials 14, Nr. 3 (25.01.2021): 562. http://dx.doi.org/10.3390/ma14030562.

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Servicing aircraft engines sometimes requires manufacturing only a single piece of a given part. Manufacturing a turbine disc using traditional methods is uneconomical. It is necessary to use a different machining method recommended for small lot production. One of the proposed methods is WEDM (wire electrical discharge machining). The article presents the results of the research on finishing WEDM of Inconel 718 turbine disc fir tree slots. The influence of infeed, mean gap voltage, peak current, pulse off-time, and discharge energy on the shape accuracy, surface roughness, microcracks, and the white layer thickness were determined. Mathematical models were developed based on the DoE (Design of Experiment) analysis. The statistical significance of the models was verified with the ANOVA (Analysis of Variance) test. The machining parameters control methods that allow achieving the required shape accuracy, surface roughness, and surface layer condition were presented. The obtained surface roughness was Ra = 0.84 μm, the shape accuracy of the slot in the normal-to-feed direction was Δd = 0.009 μm, the profile shape accuracy was Δr = 0.033 μm, and the thickness of recast (white) layer was approximately 5 μm.

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Kato, Y., K. Ohmri, E. Hatano und K. Takazawa. „The Standardization for the Edge Quality of the Precise Machining Products“. Advanced Materials Research 24-25 (September 2007): 83–90. http://dx.doi.org/10.4028/www.scientific.net/amr.24-25.83.

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BEST-JAPAN has being proceeded the standardization of the Edge Quality. Already, we announced this one at international conference on “Precision Surface Finishing and Deburring” at San Francisco and St. Petersburg. This paper describes the discussion of the Edge Quality and Indication & Evaluation Methods of The Edge Quality.

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Smolentsev, E. V., M. V. Kondratev, E. V. Pavlov und V. V. Kuts. „Non-abrasive Finishing of Mating Surfaces of Machine Parts Using Mixed Techniques with Electromagnetic Fields Application“. Proceedings of the Southwest State University 24, Nr. 3 (06.12.2020): 51–65. http://dx.doi.org/10.21869/2223-1560-2020-24-3-51-65.

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In various branches of mechanical engineering, faucets, valves, gate valves and other shut-off devices are manufactured and used. Their main purpose is to regulate the flow rate and direction of flows of liquid and gas media. Features of such products in the aerospace and petrochemical engineering are special strict requirements due to the specificity of their operation. These include, for example, high pressure, resistance to aggressive, fire-and explosive environments, leaks of which are unacceptable according to safety rules and environmental legislation. The design of such products, as a rule, assumes high requirements for accuracy and roughness, especially at the interface of parts, high strength in case of impact pulse effects of the fluids in them. To ensure the above characteristics, finishing abrasive treatment is most commonly used, which can result in the effect of impregnation of the surfaces of products, which will negatively affect the useful life and performance indicators of the mating surfaces. At the same time, it is obvious that mechanical finishing without any use of abrasives is extremely difficult and time-consuming. The authors of the article suggest elimination of the negative effect of impregnation by means of mixed machining techniques with the application of electromagnetic fields. Purpose. The purpose of the work is to develop a technology for non-abrasive finishing of machine parts by developing a model that allows selection or calculation of the production modes of gapless mating parts of locking devices applied in various industries. Methods. The method of the research is the use of the scientific basis of mixed machining techniques, the theory of mass transfer in electrical machining, the fundamental foundations of mechanical engineering technology, modern methods for studying characteristics at the final stages of machining, modern measuring tools, special technological equipment, as well as computer technologies. Results. As a result of the research, new technique and devices were developed. This made it possible to implement a non-abrasive finishing operation of the mating surfaces of parts made of metal materials, the processing of which by mechanical methods is difficult. Conclusion. As a result of the conducted research, it became possible to obtain high-quality high-resource gapless locking products and to reduce labor intensity of the finishing operation up to 5 times and preparation for the production up to 2 times.

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Madhu, S., und M. Balasubramanian. „A Review on Abrasive Jet Machining Process Parameters“. Applied Mechanics and Materials 766-767 (Juni 2015): 629–34. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.629.

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Abrasive jet machining (AJM) also known as abrasive micro-blasting or Pencil blasting is an abrasive blasting machining process that uses abrasives propelled by high velocity gas to erode material from the work piece. It has been applied to rough working such as deburring and rough finishing, machining of ceramics and electronic devices. AJM has become a useful technique for micro machining. It has various distinct advantages over the other non-traditional cutting methods, which are high machining versatility, minimum stresses on the substrate. This paper deals with several experiments that have been conducted by many researchers to assess the influence of abrasive jet machining (AJM) process parameters such as type of abrasive Particle , Abrasive Particle size, Jet pressure Nozzle tip distance. Various experiments were conducted to assess the influence of abrasive jet machine.

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Yu, Xia, Yong Yan, Lin Bo Wei, Shu Ping Li und Xian Li. „Study on Pulse Effect of Electrochemical Machining of Conductive Material“. Advanced Materials Research 230-232 (Mai 2011): 1216–20. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.1216.

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The paper mainly discussed about the development of the electrochemical machining, from early direct-current ECM (DECM) to pulse current ECM (PECM), high frequency pulse current ECM (HPECM) and ultra-high frequency pulse current ECM (UHPECM). Microscopic mechanism of the machining results were discussed in the paper. We studied the influence of power frequency to the result, effects of pulse effect on the finishing result were also researched. Besides, high-frequency group pulse and ultra-high-frequency group pulse ECM were researched in the paper, comparing the two machining methods, some important conclusions are showed as follows.

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Huang, Jiu Chao, Xian Li Liu, Cai Xu Yue, Yao Nan Cheng und Hui Zhang. „Tool Path Planning of 5-Axis Finishing Milling Machining for Closed Blisk“. Materials Science Forum 723 (Juni 2012): 153–58. http://dx.doi.org/10.4028/www.scientific.net/msf.723.153.

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To solve the difficult problem of NC machining of closed blisk, the paper combines with the structure characteristics of processing surface and the characteristics of Channel processing, and at the same time to study the technology of processing impeller channel tool path planning. By planning different processing methods of tool axis control for different processing parts, take outer arc processing as an example, tool path planning method is analyzed. By the method to generate the ruled envelope surfaces in view of blade offset surfaces, to put forward new methods of dividing plunging region. The method of surface offset was applied to determine the safety space of tool axis movement. To determine the range of tool axis angle by the relationship between the boundary curves and division the processing area by the tangent method. Finally, The results of tool path planning were verified by using five-axis processing, which proved the reasonability and feasibility of the scheme.

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Chan, Yuk Lun, und Xun Xu. „Evaluation and comparison of lubrication methods in finish machining of hardened steel mould inserts“. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 231, Nr. 14 (23.11.2015): 2458–67. http://dx.doi.org/10.1177/0954405415600683.

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Traditionally, metal cutting fluid or lubricant is used in finishing operations of high-speed machining process to reduce the rate of tool wear, which in turn will improve surface quality. In automobile and aerospace industries, minimum quantity lubrication technique is considered to provide the same level of performance as the flood coolant method and offers financial benefits by saving coolant direct and associated costs. However, scant research work has been done on minimum quantity lubrication applications in the die and mould manufacturing industry. In this study, the effects of dry, flood and minimum quantity lubrication machining on surface roughness, tool wear, dimensional accuracy and machining time of hardened steel mould inserts were compared. The results revealed that there were no significant differences between these three lubrication methods. More in-depth experimental study of dry and minimum quantity lubrication machining was then carried out using the design of experiments technique. In terms of surface roughness and tool wear, there were again no significant differences. Nevertheless, minimum quantity lubrication machining produced more accurate results than dry machining in dimensional deviation. The regression models show that feed-rate ( fz) has a larger effect on surface roughness and machining time than step-over ( ae), while depth of cut ( ap) has no significant effect on surface roughness. Based on the test piece shape, a shortest possible machining time of 3.55 h and a good surface finish of 0.28 µm can be achieved using a small feed-rate (0.03 mm/tooth), a large step-over (0.1 mm) and a large depth of cut (0.2 mm). This work shows that when combining the minimum quantity lubrication technique with the right cutting conditions in modern die and mould manufacturing, machining time and polishing time can be saved, which leads to an overall saving in production cost. Using the dry and minimum quantity lubrication techniques for different finish machining situations can therefore be a good economical solution.

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Yaroshenko, Leonid, Igor Kupchuk und Mykhailo Zamrii. „STRUCTURAL DEVELOPMENT AND RESEARCH OF TECHNOLOGICAL PARAMETERS OF MACHINES FOR CENTRIFUGAL -PLANETARY VIBRATION TREATMENT“. Vibrations in engineering and technology, Nr. 2(97) (27.08.2020): 41–50. http://dx.doi.org/10.37128/2306-8744-2020-2-5.

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The paper analyzes current state and prospects of further development of technology and equipment for mechanization and automation of finishing and cleaning of details. It is stated that the most effective for this purpose are the methods of abrasive machining, which include bulk galvanizing, vibration, centrifugal-rotary and centrifugal-planetary processing. These methods reduce the complexity and cost of processing, which in some cases reaches 20% of the total cost of manufacturing parts. Each of these methods has a different level of efficiency, certain advantages and disadvantages, the level of versatility and scope of effective application. The processes of vibration processing are quite deeply studied, for its industrial mass-produced technological equipment, but they have certain shortcomings that limit their use for further widespread implementation. Centrifugal-rotary processing is a more productive process of three-dimensional finishing and cleaning treatment, but its scope is limited by the possibility of processing parts that are not complex, usually flat. The most productive methods of finishing and cleaning of details include centrifugal-planetary volume processing which high efficiency is caused by repeated loading of particles of working load by inertial forces that creates preconditions for the solutions of a wide range of technological problems, for example, processing of details of difficult form, small weight and the sizes from materials of high hardness or viscosity that represents a serious problem for other methods of volume processing. The constructive scheme is offered in the work and the influence of the composition of the abrasive free-granular working environment on the productivity of the machine for centrifugal-planetary processing of details is investigated. The kinetics of metal removal from the surface of machined parts using different types of abrasive working environment is analyzed. The results of comparative machining of parts in a torus vibrating machine and a machine for centrifugal-planetary machining are given. It is shown that the simultaneous use of centrifugal-planetary and vibration processing methods allows to increase the intensity of the process while ensuring high quality machining of parts of relatively complex shape. The constructive scheme of the machine which allows to implement the specified combined method of processing is offered and described.

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Žitňanský, Ján, Jozef Žarnovský und Juraj Ružbarský. „Analysis of Physical Effects in Cutting Machining“. Advanced Materials Research 801 (September 2013): 51–59. http://dx.doi.org/10.4028/www.scientific.net/amr.801.51.

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This contribution focuses on hole drilling into grey cast iron and steel 11 523. The most used method of hole machining is the one using a screw drill HSS to reach the accuracy class from IT 11 up to IT 14. Surface roughness ranging between Ra 3.2 μm and Ra 6.3 μm depends on the parameters of the drill used and drilled material. An emphasis is put on the accuracy of shape and dimension as well as on meeting the tolerance limits of holes [1,2,3,4,5]. In most cases, it is possible to reach those conditions using the common methods of hole drilling. Finishing such as roughing, reaming and countersinking is used for meeting high-quality requirements [6,7,8,9].

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Ghosh, Gourhari, Ajay Sidpara und P. P. Bandyopadhyay. „Review of several precision finishing processes for optics manufacturing“. Journal of Micromanufacturing 1, Nr. 2 (20.06.2018): 170–88. http://dx.doi.org/10.1177/2516598418777315.

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The ultrasmooth optical components with atomic-order surface roughness and nanometre-level shape accuracy are in immense demand with the rapid advancement of modern optical technology. In recent years, aspherical and free-form surfaces are gaining more interest for its favorable properties. Moreover, the new optical materials with immensely enhanced mechanical properties are being developed to meet the stringent requirements of modern optics. Fabrication of complex-shaped ultrasmooth optical components becomes a significant challenge as conventional finishing techniques are unable to machine aspherical or free-form surfaces precisely. This situation demands some highly deterministic finishing processes. Mostly, the optical components are fabricated by shaping or pre-finishing methods followed by final finishing processes. In the shaping or pre-finishing methods, the rigid abrasive tools are used to remove the material at an enhanced rate and near net shape of the elements can be attained. Surface finish and shape accuracy can also be improved to some extent. Owing to the presence of residual finishing marks generated by shaping methods, the application of the components is limited to the infrared (IR) optics. Final finishing processes include more deterministic and flexible polishing techniques that can achieve desired surface finish, figure accuracy and surface integrity to make it suitable for shorter wavelength applications. In recent years, single point diamond turning, precision grinding, plasma chemical vaporization machining and magnetorheological fluid-based finishing are widely used for fabricating ultrasmooth optics. In this article, principle, mechanism of material removal and applicability of the aforementioned precision finishing processes to different materials are discussed.

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Liu, Jie. „The Process Strategies of Mould High-Speed Machining and their Applications in the Environment of PowerMILL“. Advanced Materials Research 188 (März 2011): 542–48. http://dx.doi.org/10.4028/www.scientific.net/amr.188.542.

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High-speed machining requires the support of high intelligent CAM software as well as customized machining strategies and properly selected machining parameters. Only by combining the two can the advantage of high-speed machining be made full use of. Compared to ordinary NC cutting, high-speed machining has special requirements for process strategies, CAM system and tool path. A complete tool path includes approaching/retracting tool, moving tool and tool path. Based on the above principles, a mould part is successfully processed using the PowerMILL software at the high-speed machining centre of DMG-DMU40T. The maximum hardness of the mould part is HRC50. There’s a 30 degree corner in the cavity with a transition radius of 3mm. The whole process can be divided into three stages: rough, semi-finish and finish machining and each stage involves the selection of tool path, the selection of tool, the selection of cutting parameters (including spindle speed, feed speed and depth of cut), and the application of PowerMILL specific machining methods (such as Race-line machining, rest roughing, automatic trochoidal machining, 3D offset finishing and etc).

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Ohta, Katsunori, Zhi Meng Li und Masaomi Tsutsumi. „Proposal of a Machining Test of Five-Axis Machining Centers Using a Truncated Square Pyramid“. Key Engineering Materials 523-524 (November 2012): 475–80. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.475.

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NAS 979 has been used for over 40 years as a performance evaluation standard for five-axis machining centers. This standard provides some finishing conditions of the cone-frustum under five-axis control, and prescribes the measuring methods and permissible tolerances of geometric deviations. However, this standard cannot be applied to the tilting rotary table type five-axis machining center but to the universal spindle head type one. When the standard is applied to the tilting rotary table type, it is not clear yet that the effects of the geometric and synchronous deviations which influence the measured results. Thus, there are no methods for evaluating the accuracy of linear interpolation movement under simultaneous five-axis control. This paper proposes a machining test method using a truncated square pyramid for checking the accuracy of the tilting rotary table type five-axis machining centers. In the simulation and experiment, the bottom of the truncated square pyramid with a half apex angle of 15° is mounted on a fixture with a slope of 10° or 20°, and feed velocity of each axis is analyzed by changing the center position.

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Niknam, Seyed Ali, Azziz Tiabi und Victor Songmene. „Burr edge occupancy: edge finishing index for milling machined parts“. Transactions of the Canadian Society for Mechanical Engineering 43, Nr. 2 (01.06.2019): 248–55. http://dx.doi.org/10.1139/tcsme-2018-0066.

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Machining burrs are formed at all machined workpiece edges. One useful solution to decrease machining time and cost, in particular for milling parts, is to generate machined parts edges with minimum burr. This article proposes burr edge occupancy ηs as an index to evaluate deburring difficulty and, consequently, adequate selection of suitable deburring methods. Initially the sensitivity of ηs to cutting parameters must be evaluated. We investigated the main governing factors on ηs when slot milling two types of aluminium alloys (from different families) that are used in the automotive and aerospace industries. The cutting parameters that led to edges with minimum ηs are presented. It was found that, unlike most burr size attributes, ηs is sensitive to variation of the cutting parameters used: cutting speed, family of material, and cutting tools. Lower ηs means less time and effort for deburring and edge finishing of machined parts. Furthermore, ηs measurement is more convenient than the procedures used to measure other burr size attributes, including burr height (bh) and burr thickness (bt).

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Wei, Zhao Cheng, Min Jie Wang, Wu Chu Tang und Liang Wang. „Tool Deflection Error Regularization and Compensation in End Milling of Contour Surfaces“. Applied Mechanics and Materials 217-219 (November 2012): 1341–45. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1341.

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This paper presents a new approach of tool deflection error regularization and compensation in end milling of contour surfaces. The material removal rate (MRR) is adopted as the dominant factor of surface dimensional error. A mathematics model of determining the MRR in generalized contour surfaces machining is proposed. Feedrate scheduling methodology is applied to regulate a constant MRR along curved tool path. The expectation with the constant MRR is that it will potentially produce a constant surface dimensional error. Thus, the compensation can be conveniently achieved by offsetting the nominal finishing path. The desired MRR and corresponding offsetting value of finishing tool path are determined by a peripheral milling test. Machining results obtained in this study reveal that the proposed approach can significantly reduce the surface dimensional error and the smooth variation of feedrate can get a few variation of surface dimensional error. Comparing to the existing methods, the time-consuming iterative process in error compensation is omitted.

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Stwora, Andrzej, Grzegorz Skrabalak und Joanna Maszybrocka. „To enhance mechanical properties of parts produced from AlSi10Mg powder with use of SLS/SLM methods by densification of the product surface layer“. Mechanik 90, Nr. 5-6 (29.05.2017): 426–31. http://dx.doi.org/10.17814/mechanik.2017.5-6.58.

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The paper presents results of experiments including application of finish machining (turning and burnishing) of samples produced with SLS/SLM, as well as influence of the sample orientation against the surface of base plate during building process (0°, 45°, 90°) on tensile strength of the produced samples. There are also presented results of microstructure examination and results of density measurements. The paper also discusses the state of samples surface layer depending on the applied finishing method.

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Mikolajczyk, Tadeusz. „Videooptical Surface Shape and Integrity Estimation in Robots Machining“. Applied Mechanics and Materials 332 (Juli 2013): 270–75. http://dx.doi.org/10.4028/www.scientific.net/amm.332.270.

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Paper shows system to surface shape and quality control in machining using industrial robot. To surface control videooptical methods were used. Surface shape was controlled using the special reverse engineering system. To surface roughness measure machined surface reflectivity method was used. Used own constructions non contact system was equipped with red laser light and USB camera. Wrist of robot was equipped with grinding tool. In paper shows some algorithms of presented processes. Shown too examples of experiments results in surface roughness measure in start end of grinding process. First trials of presented system shows possibility to build smart machining system for finishing of surface with unknown shape.

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Uhlmann, E. Prof, und S. Roßkamp. „Definiertes Kantenrunden durch Strömungsschleifen*/Accurately defined edge rounding by abrasive flow machining“. wt Werkstattstechnik online 106, Nr. 06 (2016): 400–406. http://dx.doi.org/10.37544/1436-4980-2016-06-30.

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Die Feinbearbeitung von innenliegenden Werkstückkanten ist nur mit wenigen Fertigungsverfahren möglich. Nun liegen neue Erkenntnisse zu den Potentialen des Strömungsschleifens in dieser Bearbeitungsaufgabe vor. So zeigt dieser Fachbeitrag einerseits die Qualifizierung gerundeter Kanten hinsichtlich der beiden Größen Radius und Form, andererseits werden Ergebnisse aus technologischen Untersuchungen zum Einfluss der Bearbeitungsparameter auf die Kantenrundung vorgestellt.   Only a few machining methods are suitable for finishing edges inside workpieces. Now there are new findings about the potentials of abrasive flow machining in this assignment. On the one hand the qualification of edges in regard to radius and shape will be outlined in this technical contribution. On the other hand the results of technological investigations about the influence of machining parameters on edge rounding will be presented.

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Izamshah, Raja, Nurul Husna, Mohd Hadzley, Mohd Amran, Mohd Shahir Kasim und S. Amri. „Determination on the Effect of Cutter Geometrical Feature for Machining Polyetheretherketone (PEEK) Using Taguchi Methods“. Applied Mechanics and Materials 699 (November 2014): 192–97. http://dx.doi.org/10.4028/www.scientific.net/amm.699.192.

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This paper details the application of Taguchi method to determine the effect of cutter geometrical features for machining Polyetheretherketones (PEEK) thermoplastic. The planned experiment was conducted by using Taguchi’s orthogonal array taking into account the ball nose geometrical parameters such as helix angle, rake angle, clearance angle and number of flute. The measured response is the machined surface roughness, which is important for the component functionality. In addition, ANOVA was used to validate the percentage contribution of each factor. The obtained results reveals that, less number of flutes is the main factor contributed towards fine surface roughness for this thermoplastic. Fewer flutes provide a smooth flow of chip ejection and minimize the friction on the cutting zone which is vital for polymeric material such as PEEK. High helix and rake angles also influence the machined surface roughness as both angles provide optimum shearing force to produced better surface finishing. However, it is found that clearance angle is less significant on roughness since the function of clearance angle is to control the process damping and stability. The main conclusion of this study is that there is significant effect on the cutter geometrical feature on machining performance and thus conclude the need of special design cutter for effectively machining PEEK plastic.

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Chumak, Anatolii, Sergey Klimenko, Sergei Klimenko, Andriy Manokhin, Artem Naydenko, Marina Kopeikina, Vitalii Burikin, Maksim Bondarenko und Viktor Burlakov. „FINISH MACHINING OF THE CUTTING INSERTS FROM CUBIC BORINE NITRIDE BL GROUP COMPOSITE“. Cutting & Tools in Technological System, Nr. 94 (16.06.2021): 102–14. http://dx.doi.org/10.20998/2078-7405.2021.94.12.

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Finishing methods of machining of superhard composite’s working elements based on cubic boron nitride BL group are considered. The results of the microgeometry formation research of the cutting inserts’ surfaces during machining by free powders of synthetic diamond, grinding wheels and a method of vibro-magnetic-abrasive machining (VMAM) are presented. It is shown that during VMAM the friction between the inserts’ surfaces and the abrasive particles result in microremoval of the material, which reduces the roughness of the cutting inserts’ surfaces. It is established that additional fine grinding with 14/10 mkm synthetic diamond powder provides the absence of microgeometry defects of the cutting inserts’ surfaces left by pre-machining. The result of high-quality rounding of cutting edges and the formation of surfaces of cutting inserts with less roughness is an increase in strength and wear resistance of metal-cutting tools in high-speed machining under conditions of significant loads.

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An, Li Bao. „Optimal Selection of Machining Parameters for Multi-Pass Turning Operations“. Advanced Materials Research 156-157 (Oktober 2010): 956–60. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.956.

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In this paper, the parameter optimization problem for multi-pass turning operations is studied. A mathematical model based on the minimum production cost criterion is developed. The unwanted material is removed by one finishing pass and at least one roughing passes depending on the total depth of cut. Maximum and minimum allowable cutting speeds, feed rates and depths of cut, as well as tool life, surface roughness, cutting force and cutting power consumption are constraints of the model. Optimal values of machining parameters are found by three methods: integer programming, nonlinear programming, and genetic algorithms. An example is presented to illustrate the effectiveness of the optimization model and solution methods. The model generates lower unit production costs compared with the results from the literature and machining data handbook.

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Cui, Jianlei, Xuyang Fang, Xiangyang Dong, Xuesong Mei, Kaida Xu, Zhengjie Fan, Zheng Sun und Wenjun Wang. „Fabrication of PCD Skiving Cutter by UV Nanosecond Laser“. Materials 14, Nr. 14 (19.07.2021): 4027. http://dx.doi.org/10.3390/ma14144027.

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Polycrystalline diamond (PCD) skiving cutter has dominated research in recent years. However, the traditional methods of fabrication have failed to cut the diamond with high quality. We propose the two-step laser machining process combining roughing machining with orthogonal irradiation and finishing machining with tangential irradiation. In addition, the processing effect and mechanism of different lasers on the diamond were investigated by a finite element analysis. It’s proved that the ultraviolet nanosecond laser is an excellent machining method for the processing of diamond. Furthermore, the effect of the processing parameters on the contour accuracy (Rt) was studied. The result indicates that the Rt value decreases first and then increases as the increase of the line interval, scanning speed and defocusing amount (no matter positive or negative defocus). Further, Raman spectroscopy was applied to characterize the diamond surface under different cutting methods and the flank face of the tool after processing. Finally, a high-quality PCD skiving cutter was obtained with an Rt of 5.6 µm and no phase transition damage.

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Ming, Ping Mei, Di Zhu und Zheng Yang Xu. „Electrochemical Grinding for Unclosed Internal Cylinder Surface“. Key Engineering Materials 359-360 (November 2007): 360–64. http://dx.doi.org/10.4028/www.scientific.net/kem.359-360.360.

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The electro discharge machining (EDM) process is widely applied to produces surfaces of difficult-to-machine materials that require some form of grinding or finishing operation. This is conducted so as to improve the surface texture and appearance of the component’s surface. However, it is also desirable to remove the white uppermost recast layer or damaged surface layer (produced by the EDM process) in order to improve the functional performance of the surface. The finishing of the surface by traditional manual methods, especially in the operation of small and long internal cylinder surface, is both tedious and time-consuming. A novel electrically conductive diamond mounted point electrochemical grinding (DMP-ECG) process is being developed for hard passive alloys unclosed internal cylinder surface grinding. The process mechanism of DMP-ECG is introduced; the influence parameters of the surface roughness, machining accuracy, and diamond tool wear are investigated experimentally for nickel-based super alloys materials. An application of the DMP-ECG to aircraft engine component is verified in term of the optimized process parameters.

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Zhang, Rong, Pengcheng Hu und Kai Tang. „Five-axis finishing tool path generation for a mesh blade based on linear morphing cone“. Journal of Computational Design and Engineering 2, Nr. 4 (02.07.2015): 268–75. http://dx.doi.org/10.1016/j.jcde.2015.06.013.

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Abstract Blisk is an essential component in aero engines. To maintain good aero-dynamic performance, one critical machining requirement for blades on blisk is that the generated five-axis tool path should be boundary-conformed. For a blade discretely modeled as a point cloud or mesh, most existing popular tool path generation methods are unable to meet this requirement. To address this issue, a novel five-axis tool path generation method for a discretized blade on blisk is presented in this paper. An idea called Linear Morphing Cone (LMC) is first proposed, which sets the boundary of the blade as the constraint. Based on this LMC, a CC curve generation and expansion method is then proposed with the specified machining accuracy upheld. Using the proposed tool path generation method, experiments on discretized blades are carried out, whose results show that the generated tool paths are both uniform and boundary-conformed. Highlights Five-axis finishing tool path based on Linear Morphing Cone (LMC) is presented. The method is implemented on a mesh model. Tool path generated from the proposed method is boundary-conforming. Boundaries of the machining region can be arbitrarily assigned. Experiments are carried out on two mesh blades.

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Micallef, Christian, Yuri Zhuk und Adrianus Indrat Aria. „Recent Progress in Precision Machining and Surface Finishing of Tungsten Carbide Hard Composite Coatings“. Coatings 10, Nr. 8 (25.07.2020): 731. http://dx.doi.org/10.3390/coatings10080731.

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Owing to their high hardness, fracture toughness and oxidation resistance, tungsten carbide (WC) coatings are extensively deposited on parts that operate in demanding applications, necessitating wear, erosion, and corrosion resistance. The application of thick and hard WC coatings has an inevitable effect on the original dimensions of the parts, affecting the geometrical tolerances and surface roughness. The capability of achieving a sub-micron surface finish and adhere to tight geometrical tolerances accurately and repeatably is an important requirement, particularly with components that operate in high-precision sliding motion. Meeting such requirements through conventional surface finishing methods, however, can be challenging due to the superior mechanical and tribological properties of WC coatings. A brief review into the synthesis techniques of cemented and binderless WC coatings is presented together with a comprehensive review into the available techniques which are used to surface finish WC-based coatings with reference to their fundamental mechanisms and capabilities to process parts with intricate and internal features. The binderless WC/W coating considered in this work is deposited through chemical vapour deposition (CVD) and unlike traditional cemented carbide coatings, it has a homogenous coating structure. This distinctive characteristic has the potential of eliminating key issues commonly encountered with machining and finishing of WC-based coatings. Here, six contact and non-contact surface finishing techniques, include diamond turning, precision grinding, superfinishing, vibratory polishing, electrical discharge machining, and electropolishing are discussed along with their current use in industry and limitations. Key challenges in the field are highlighted and potential directions for future investigation, particularly on binderless WC coatings, are proposed herein.

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Nguyen Lam, Khanh. „Study on multi-objective optimization of X12M steel milling process by reference ideal method“. EUREKA: Physics and Engineering, Nr. 4 (23.07.2021): 89–104. http://dx.doi.org/10.21303/2461-4262.2021.001737.

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For all machining cutting methods, surface roughness is a parameter that greatly affects the working ability and life of machine elements. Cutting force is a parameter that not only affects the quality of the machining surface but also affects the durability of cutter and the level of energy consumed during machining. Besides, material removal rate (MRR) is a parameter that reflects machining productivity. Workpiece surface machining with small surface roughness, small cutting force and large MRR is desirable of most machining methods. Milling is a popular machining method in the machine building industry. This is considered to be one of the most productive machining methods, capable of machining many different types of surfaces. With the development of the cutting tool and machine tool manufacturing industries, this method is increasingly guaranteed with high precision, sometimes used as the final finishing method. Milling using a face milling cutter is more productive than using a cylindrical cutter because there are multiple cutter s involved at the same time. This article presents a study of multi-objective optimization of milling process using a face milling cutter. The experimental material used in this study is X12M steel. Taguchi method has been applied to design an orthogonal experimental matrix with 27 experiments (L27). In which, five parameters have been selected as the input parameters of the experimental process including insert material, tool nose radius, cutting speed, feed rate and cutting depth. The Reference Ideal Method (RIM) is applied to determine the value of input parameters to ensure minimum surface roughness, minimum cutting force and maximum MRR. Influence of the input parameters on output parameters is also discussed in this study

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Сорокоумова, Дина, Dina Sorokoumova, Сергей Григорьев, Sergey Griroriev, Ксения Лаптева, Ksenia Lapteva, Дарья Шабалина et al. „COMPARATIVE ASSESSMENT OF EFFICIENCY ULTRASONIC AND SOUND METHODS OF ACTIVATION IRRIGATIONAL SOLUTION IN ROOT CHANNELS WITH SIMPLE AND DIFFICULT ANATOMY (PILOT STUDY)“. Actual problems in dentistry 15, Nr. 1 (06.05.2019): 57–62. http://dx.doi.org/10.18481/2077-7566-2019-15-1-57-62.

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Background. The problem of increase in efficiency of endodontic treatment is relevant nowadays. Treat the decisive factors affecting quality of endodontic treatment: machining, irrigation and sealing of root channels. Machining of root channels does not allow to remove the greased layer. So an integral part of endodontic treatment is the irrigation of the root channel. Objectives ― to choose an optimum way of activation of irrigational solutions for removal of the greased layer in root channels with difficult anatomy. Methodology. The research of 30 intact painters removed on medical indications is conducted. Activation of irrigational solution was carried out by a sound the device EndoActivator and the ultrasonic IRRI K file on the device VDW.ULTRA. in root channels with simple and difficult anatomy. An object of a research was the internal wall of the root channel with the greased layer on the surface of dentine of the root. The research of samples was conducted by means of the scanning electronic microscope of JSM-6390LV. Results. When machining on an internal wall of root channels on the surface of dentine the greased layer is formed. Studying of samples with simple anatomy of root channels and activation of irrigational solutions revealed that the greased layer is removed throughout. When studying samples of teeth with difficult anatomy of root channels, it is determined, partially open dentinny a tubule at activation of solutions ultrasonic or sound by methods, and completely open dentin a tubule at activation of irrigational solution by the combined method. Conclusions. Carrying out activation of solutions in root channels with simple anatomy at a stage of a finishing irrigation is identical effectively as by ultrasonic, and sound methods. Application at a stage of a finishing irrigation of a sound method of activation in teeth with difficult anatomy of root channels allows to delete more than the greased layer, than ultrasonic activation. For the purpose of increase in efficiency of clarification of the root channel in teeth with difficult anatomy expediently combined use of sound and ultrasonic methods.

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Ab Rashid, Mohd Fadzil Faisae, Nik Mohd Zuki Nik Mohamed, Ahmad Nasser Mohd Rose, Saiful Anwar Che Ghani und Wan Sharuzi Wan Harun. „Implementation of Ant Colony Optimization Algorithm to Minimize Cost of Turning Process“. Applied Mechanics and Materials 695 (November 2014): 558–61. http://dx.doi.org/10.4028/www.scientific.net/amm.695.558.

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In machining process, turning is one of process that were significantly change by introduction of computer numerical control (CNC). However, the process improvement is not stopping there, but the focused has change to reduce the machining cost. Improper parameter selection will caused vibration in cutting, unsecure workpiece, unappealing finishing and cost consuming. Therefore, the optimum parameter setting is required because it related to certain quality characteristics such as the unit production cost. This paper presents the study to minimize production cost for CNC turning process by using Ant Colony Optimization (ACO). The result shows that, the ACO was capable to search for optimum production cost in shorter time compare to other methods, including Genetic Algorithm.

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Singh, Palwinder, Lakhvir Singh und Sehijpal Singh. „Finishing of Tubes using Bonded Magnetic Abrasive Powder in an Abrasive Medium“. Powder Metallurgy Progress 20, Nr. 1 (01.06.2020): 1–11. http://dx.doi.org/10.2478/pmp-2020-0001.

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Abstract Magnetic abrasive flow finishing (MAFF) is an unconventional process capable of producing fine finishing with machining forces controlled by a magnetic field. This process can be utilized for hard to achieve inner surfaces through the activity of extrusion pressure, combined with abrasion activity of a magnetic abrasive powder (MAP) in a polymeric medium. MAP is the key component in securing systematic removal of material and a decent surface finish in MAFF. The research background disclosed various methods such as sintering, adhesive based, mechanical alloying, plasma based, chemical, etc. for the production of bonded MAP. This investigation proposes bonded MAP produced by mechanical alloying followed by heat treatment. The experiments have been conducted on aluminum tubes to investigate the influence of different parameters like magnetic field density, extrusion pressure and number of working cycles. The bonded magnetic abrasive powder used in MAFF is very effective to finish tubes’ inner surfaces and finishing is significantly improved after processing.

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Ren, Wen Jing, Jian Yun He und Yuan Yu. „Tool-Path Scheduling for Free-Form Surface Based on MasterCAM“. Applied Mechanics and Materials 556-562 (Mai 2014): 1400–1403. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1400.

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The tool-path generating methods of roughing and finishing provided by MasterCAM were systematically analyzed including their features and applications. Then a blade with freeform surface milled by different tool-paths was simulated. According to the comparison of simulation effects and information, the flow-line tool-path was proposed to be optimal for machining blade with freeform surface. Finally, the blade was finished with optimal tool-path using a 3-axis NC milling machine.

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