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Letteratura scientifica selezionata sul tema "Grinding machines"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 luglio 2024

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Articoli di riviste sul tema "Grinding machines"

1

Dai, Zhe Min, e De Sheng Li. "The Analysis of Grinding and Polishing for the Tile Planetary Disc Griding Machine". Advanced Materials Research 538-541 (giugno 2012): 1235–39. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1235.

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In this study, the polishing machine’s mathematical model of the movement has been established by analysis the several polishing machines’ grinding and polishing process for tile. Then according to the model to simulate the trajectory and compare the grinding grain uniformity and the size of the grinding area. The results show that the disc grinding machine in improving of the efficiency of grinding and grinding grain uniformity is better than the other motions.

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2

Stepanov, Mykhailo, Petro Litovchenko, Larysa Ivanova e Maryna Ivanova. "STUDY OF THE INFLUENCE OF THE WORKING LIQUID TEMPERATURE IN THE SPINDLE BEARINGS OF A CYLINDRICAL GRINDING MACHINE ON THE ERRORS OF ITS POSITION RELATIVE TO THE PART BEING MACHINED". Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, n. 2 (2 ottobre 2022): 49–55. http://dx.doi.org/10.20998/2079-004x.2022.2(6).07.

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The article presents the results of measurements of the ambient temperature around the working cylindrical grinding machines during the working day. The analysis of the behavior of the grinding head spindle of different cylindrical grinding machines during the work shift is performed, namely the results of experimental studies of the displacement of the front and rear ends of the grinding head spindle of cylindrical grinding machines are presented. The analysis of influence of temperature of working fluids in spindle bearings on its displacement is carried out. Possible changes in the geometric shape, namely, conicity, of parts machined on cylindrical grinding machines have been established.

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3

Nazaretov, A. A. "Experimental studies of sound pressure levels at the workplaces of operators of small-scale mechanization equipment when grinding rails". Herald of the Ural State University of Railway Transport, n. 3 (2021): 109–15. http://dx.doi.org/10.20291/2079-0392-2021-3-109-115.

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Intensive wear of rails in curves significantly reduces their service life, reduces the efficiency of operational work. A promising direction in solving this problem is the technology of rail grinding, which allows mechanical processing of the rail head without dismantling them in the conditions of a railway track. The article presents the results of studies of the noise impact on track workers when grinding rails by means of small mechanization-a rail-grinding machine SH-1, a grinding machine 2152D and a manual machine for grinding rails MRSH3. The analysis of various layouts of rail grinding machines, their features, technical characteristics and octave levels of sound pressure when these machines are running at idle and under load was carried out. According to the results of experimental studies, graphical dependences of the sound pressure levels of rail grinding machines are constructed, the excess of the noise level over the permissible sanitary standards in the area of rail grinding by means of small mechanization is revealed.

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4

Liu, Chien-Sheng, e Yang-Jiun Ou. "Grinding Wheel Loading Evaluation by Using Acoustic Emission Signals and Digital Image Processing". Sensors 20, n. 15 (22 luglio 2020): 4092. http://dx.doi.org/10.3390/s20154092.

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In the manufacturing industry, grinding is used as a major process for machining difficult-to-cut materials. Grinding is the most complicated and precise machining process. For grinding machines, continuous generating gear grinding machines are widely used to machine gears which are essential machine elements. However, due to its complicated process, it is very difficult to design a reliable measurement method to identify the grinding wheel loading phenomena during the grinding process. Therefore, this paper proposes a measurement method to identify the grinding wheel loading phenomenon in the grinding process for continuous generating gear grinding machines. In the proposed approach, an acoustic emission (AE) sensor was embedded to monitor the grinding wheel conditions; an offline digital image processing technique was used to determine the loading areas over the surface of Al2O3 grinding wheels; and surface roughness of the ground workpiece was measured to quantify its machining quality. Then these three data were analyzed to find their correlation. The experimental results have shown that there are two stages of grinding in the grinding process and the proposed measurement method can provide a quantitative grinding wheel loading evaluation from the AE signals online.

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5

Li, Ping, e Bang Jun Wang. "Analysis of Grinding Angle Based on Grinding Machine". Advanced Materials Research 411 (novembre 2011): 130–34. http://dx.doi.org/10.4028/www.scientific.net/amr.411.130.

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The value of grinding angle of grinding machine directly affects working efficiency and processing precision of gear grinding machines. A mathematical model of Generating Motion is established by analyzing and studying working principle and machining processes of the grinding machine. Equations of Generating Motion had been determined when the grinding machine was working. Then the relationship between grinding angle and Generating Motion was gotten and the optimal value of the grinding angle was finally obtained.

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6

Piekaj, Paweł. "Modern grinding balls sorting machines". New Trends in Production Engineering 2, n. 1 (1 ottobre 2019): 86–95. http://dx.doi.org/10.2478/ntpe-2019-0009.

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Abstract Raw materials produced in large quantities are ground in ball, vibratory and stirred ball mills. In mills, the working parts are grinding balls. During grinding, grinding balls wear, change their diameter and lose their shape. The effect of this is the unfavourable change in the grinding balls parameters, which results in deterioration of the technological conditions of the milling process. Relevant parameters of the grinding balls set are restored during maintenance shutdowns. Grinding balls are sorted into appropriate size classes; grinding balls that are not suitable for further use are rejected, and then a set of grinding balls with appropriate parameters is used again. The time needed to prepare the required set depends mainly on the sorting time. To reduce this time, appropriate grinding balls sorting machines are used. The paper presents major problems associated with the grinding balls sorting process, a comparison of modern types of grinding balls sorting machines, a description of their construction and technological parameters.

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7

Larshin, Vasily, e Natalya Lishchenko. "Gear grinding system adapting to higher CNC grinder throughput". MATEC Web of Conferences 226 (2018): 04033. http://dx.doi.org/10.1051/matecconf/201822604033.

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The paper is devoted to a solving an important scientific and technical problem of increasing the productivity of defect-free profile gear grinding on CNC machines on the basis of development of on-machine intelligent subsystems for the grinding operation designing, monitoring, and diagnosing which allow grinding system elements adapting to a higher productivity of the CNC grinder. The characteristic of the adaptation principle in manufacturing systems on CNC machines is given in accordance with both the systems and control theories. The productivity resources based on the use of the adaptation principle are studied and identified as well as a methodology is developed for researching the grinding system using scientific methods of modeling, optimization and control. Besides, corresponding technological preconditions are given in the form of a set of purposeful methods and means of innovative profile grinding technology, including grinding stock on-machine measurement and transformation the stock uncertainty into the grinding wheel displacement from the gear to be grinded.

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8

Кузнецов, Ю. П., В. Л. Химич, С. Н. Хрунков, А. Б. Чуваков e Р. А. Погодин. "Trends and development prospects of manual pneumatic grinding machines". MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)</msg>, n. 4(54) (2 dicembre 2021): 42–47. http://dx.doi.org/10.37220/mit.2021.54.4.029.

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В работе представлен анализ результатов эволюции параметров ручных пневматических шлифовальных машин на протяжении значительного интервала времени. Показаны достижения ведущих мировых производителей и выбраны три основных параметра, характеризующие возможности шлифовальных машин. Выявлены тенденции изменения удельной мощности и удельного расхода машин. Проведен сравнительный анализ перспектив развития машин с ротационным и турбинным приводом. Рассмотрена проблема совместной работы режущего инструмента и шлифовальной машины. Выявлена недостаточная быстроходность ручных пневматических шлифовальных машин с ротационным типом привода. Сделан вывод о большей перспективности применения многоступенчатых турбин в качестве привода шлифовальных машин. Представлен анализ компоновочных схем машин с турбинным приводом мировых производителей. Обоснована новая высокоэффективная конструктивная схема радиальных многоступенчатых турбин для привода пневматических шлифовальных машин. Показаны преимущества предложенной схемы, определены пути преодоления технологических барьеров при ее реализации. The paper suggests the results of analysis the parameters evolution of manual pneumatic grinding machines for a long time. The achievements of the world's leading manufacturers are shown and three main parameters that define the performance of grinding machines are selected. Trends in the specific power and specific air consumption of the machines are opened. An analysis of the development prospects for rotary and turbine machines is carried out. The problem of common action of a cutting tool and a grinding machine is considered. The insufficient speed of rotary manual pneumatic grinding machines is shown. It is determined that multi-stage turbines are most preferable for grinding machines. The design analysis of turbine machines of world manufacturers is presented. A new high-efficiency design of radial multi-stage turbines for driving pneumatic grinding machines is founded. The advantages of the new design are shown. The ways of overcoming technological challenges in the new design implementation are determined.

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9

Liu, Peng-Zhan, Wen-Jun Zou, Jin Peng, Xu-Dong Song e Fu-Ren Xiao. "Designed a Passive Grinding Test Machine to Simulate Passive Grinding Process". Processes 9, n. 8 (29 luglio 2021): 1317. http://dx.doi.org/10.3390/pr9081317.

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Passive grinding is a high-speed rail grinding maintenance strategy, which is completely different from the conventional rail active grinding system. In contrast to active grinding, there is no power to drive the grinding wheel to rotate actively in passive grinding. The passive grinding process is realized only by the cooperation of grinding pressure, relative motion, and deflection angle. Grinding tests for passive grinding can help to improve the passive grinding process specifications and be used for the development of passive grinding wheels. However, most of the known grinding methods are active grinding, while the passive grinding machines and processes are rarely studied. Therefore, a passive grinding test machine was designed to simulate passive grinding in this study. This paper gives a detailed description and explanation of the structure and function of the passive grinding tester. Moreover, the characteristics of the grinding process and parameter settings of the testing machine were discussed based on the passive grinding principle. The design of a passive grinding test machine provides experimental equipment support for investigating passive grinding behavior and grinding process.

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10

Shashurin, Aleksandr, Zhenish Razakov e Alexander Chukarin. "THEORETICAL STUDY OF THE VIBRATION EXCITATION AND NOISE GENERATION PROCESSES OF THE GRINDING WHEELS OF THREAD- AND SPLINE GRINDING MACHINES". VOLUME 39, VOLUME 39 (2021): 173. http://dx.doi.org/10.36336/akustika202139173.

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Abstract (sommario):

The competitiveness of machine-building products is largely determined by the accuracy of mechanical processing of the manufactured parts and the state of the surface layer. The condition of the surface layer is carried out by finishing operations, such as grinding. The volume of grinding operations is from 25 to 60 % of various technological operations. Working conditions in the grinding areas are considered harmful and dangerous. [1]. The noise levels at the workplaces of these machines’ operators exceed the standard values. The sound emission from the part during grinding is a particular feature of this process. A theoretical study of the noise generation processes on such machines was carried out to develop the recommendations.

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Più fonti

Tesi sul tema "Grinding machines"

1

Agahi, Maryam. "Grinding polycrystalline diamond using a diamond grinding wheel". Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20061114.150854/index.html.

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Orton, P. A. "Instrumentation and control for precision grinding machines". Thesis, Nottingham Trent University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278450.

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This thesis examines the present methods of centre less bearing grinding, with a view to applying IIDderncontrol nethods in order to reduce the distribution of output size variations and improve the quality of surface finish. Established rrodels of the grinding process shew that various inportant parameters describing the process can be derived, providing that the grinding power can be accurately rronitored. Several alternative control strategies based on paNer rronitoring are considered. The drive systems of a typical grinding machine are rrodelled as they react through the non-linear grinding wheel/work interface. A simplified computer simulation of the process is demonstrated. Suitable rrethods of instrumentation are evaluated including the optical shaft encoder as a source of high resolution data for the estimation of drive shaft dynamics. A method is devised for on line pararreter estimation of the drive system transfer functions. This enables the important grinding power to be estimated fran shaft dynamics and also al loes the rronitoring of the drive system parameters. The cpt.ica l shaft encoder is also assessed as the source of data for vibration detection. A development conputer with real tine multi-tasking operating system software and specialised shaft encoder interfacing has been established as a basis for an expandable control and rronitoring system. A plan for feeackcontrol of the grinding, involving several separate control algorithms cormunicating with an expert system executive controller, is outlined.

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3

Hecker, Rogelio Lorenzo. "Power feedback control in cylindrical grinding process". Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16619.

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Cowan, Richard Watson. "An adaptive statistically based controller for through-feed centerless grinding". Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17570.

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Banini, George Agbeko. "An integrated description of rock breakage in comminution machines /". [St. Lucia], 2000. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16293.pdf.

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Braden, Jason Patrick. "Open architecture and calibration of a cylindrical grinder". Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18190.

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Hekman, Keith Alan. "Precision control in compliant grinding via depth-of-cut manipulation". Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/16627.

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Pena-Diaz, Hernan R. "Experimental validation of an atomization model for fluids used in the grinding process". Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/18999.

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Bibler, Jared Evan. "Effects of imbalance and geometric error on precision grinding machines". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43428.

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Milton, Gareth Edward Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "An automated micro-grinding system for the fabrication of precision micro-scale profiles". Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2006. http://handle.unsw.edu.au/1959.4/32285.

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Abstract (sommario):

Production of micro-scale components is an important emergent field. One underdeveloped area is the production of micro-scale 3D surfaces, which has important applications in micro-optics and fibre optic sensors. One particular application is the production of micro-lenses. With scales of less than 200 ??m these lenses can improve light coupling efficiencies in micro-optic systems. However, current lens production techniques have limitations in accuracy and versatility. Creating these surfaces through mechanical micro-grinding has the potential to improve the precision and variety of profiles that can be produced, thus improving transmission efficiencies and leading to new applications. This work presents a novel micro-grinding method for the production of microscale asymmetric, symmetric and axisymmetric curved components from brittle materials such as glasses. A specialised micro-grinding machine and machining system has been designed, constructed and successfully tested and is presented here. This system is capable of producing complex profiles directly on the tips of optical fibre workpieces. A five degree of freedom centring system is presented that can align and rotate these workpieces about a precision axis, enabling axisymmetric grinding. A machine vision system, utilising a microscope lens system and sub-pixel localisation techniques, is used to provide feedback for the process, image processing techniques are presented which are shown to have a sensing resolution of 300 nm. Using these systems, workpieces are centred to within 500 nm. Tools are mounted on nanometre precise motion stages and motion and infeed are controlled. Tooling configurations with flat and tangential grinding surfaces are presented along with control and path generation algorithms. The capabilities and shortcomings of each are presented along with methods to predict appropriate feed rates based on experimental data. Both asymmetric and axisymmetric flat and curved micro-profiles have been produced on the tips of optical fibres using this system. These are presented and analysed and show that the system, as described, is capable of producing high quality micro-scale components with submicron dimensional accuracy and nanometric surface quality. The advantages of this technique are compared with other processes and discussed. Further development of the system and technique are also considered.

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Più fonti

Libri sul tema "Grinding machines"

1

Jackson, Mark J. High Performance Grinding and Advanced Cutting Tools. New York, NY: Springer New York, 2013.

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2

Kibbe, Richard R. Grinding machine operations. New York: Wiley, 1985.

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3

Mazalʹskiĭ, V. N. Superfinishnye stanki. 2^a ed. Leningrad: "Mashinostroenie," Leningradskoe otd-nie, 1988.

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4

Panʹkov, L. A. Obrabotka instrumentami iz shlifovalʹnoĭ shkurki. Leningrad: "Mashinostroenie," Leningradskoe otd-nie, 1988.

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5

International Conference on Abrasive Technology (14th 2007 Nanjing, China). Advances in grinding and abrasive technology xiv: Selected papers from the 14th conference of abrasive technology in China 26th-28th October, 2007, Nnjing, China. Stafa-Zuerich: Trans Tech Publications, 2008.

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6

China) Conference on Abrasive Technology in China (15th 2009 Zhengzhou. Advances in grinding and abrasive technology XV: Selected, peer reviewed papers from the 15th Conference on Abrasive Technology in China, 15th-17th August, 2009, Zhengzhou, China. A cura di Zhao Bo. Stafa-Zurich, Switzerland: Trans Tech Publications, 2009.

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7

Milton C. Shaw Grinding Symposium (1985 Miami Beach, Fla.). Milton C. Shaw Grinding Symposium: Presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Miami Beach, Florida, November 17-22, 1985. New York, N.Y: American Society of Mechanical Engineers, 1985.

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8

Klotz, Norbert. Beurteilung des statischen und dynamischen Verhaltens von Umfangschleifmaschinen. Düsseldorf: VDI Verlag, 1987.

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9

Rajagopal, Vathsala. The effect of chromium on the abrasive and corrosive wear of cast iron grinding media. Minneapolis, MN: University of Minnesota, 1991.

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10

Abdulwahab, Malek. Fully automatic wheel balancing systems for grinding machines. Birmingham: University of Birmingham, 1988.

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Più fonti

Capitoli di libri sul tema "Grinding machines"

1

Wegener, Konrad. "Grinding Machines". In CIRP Encyclopedia of Production Engineering, 1–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-35950-7_16787-1.

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2

Jayendran, Ariacutty. "Grinding machines". In Englisch für Maschinenbauer, 117–21. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-663-14137-2_20.

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3

Wegener, Konrad. "Grinding Machines". In CIRP Encyclopedia of Production Engineering, 809–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-53120-4_16787.

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Jayendran, Ariacutty. "Grinding machines". In Englisch für Maschinenbauer, 117–21. Wiesbaden: Vieweg+Teubner Verlag, 1997. http://dx.doi.org/10.1007/978-3-322-91976-2_20.

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5

Huda, Zainul. "Grinding Operations and Machines". In Machining Processes and Machines, 181–200. First edition. | Boca Raton : CRC Press, 2020.: CRC Press, 2020. http://dx.doi.org/10.1201/9781003081203-14.

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Peng, Yunfeng, Zhenzhong Wang e Ping Yang. "Grinding and Dressing Tools for Precision Machines". In Precision Manufacturing, 233–63. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-0381-4_24.

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Peng, Yunfeng, Zhenzhong Wang e Ping Yang. "Grinding and Dressing Tools for Precision Machines". In Precision Manufacturing, 1–31. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-10-5192-0_24-1.

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Gao, Y., e S. Tse. "Evaluation of Dynamic Parameters for Underdamped Grinding Machines". In Key Engineering Materials, 631–36. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-977-6.631.

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Cao, L. X., H. J. Wu e J. Liu. "Kinematic Analysis of Face Grinding Process at Lapping Machines". In Advances in Abrasive Technology VIII, 145–50. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-974-1.145.

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Nikitina, I. P., e A. N. Polyakov. "Improving Thermal Characteristics of Double-Sided Face Grinding Machines". In Lecture Notes in Mechanical Engineering, 112–21. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-38126-3_12.

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Atti di convegni sul tema "Grinding machines"

1

McKeown, Patrick A., Keith Carlisle, Paul Shore e R. F. Read. "Ultraprecision, high stiffness CNC grinding machines for ductile mode grinding of brittle materials". In London - DL tentative, a cura di Alan H. Lettington. SPIE, 1990. http://dx.doi.org/10.1117/12.22336.

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2

Zerenko, Thomas. "STATE-OF-THE-ART ROLL GRINDING BY UTILIZATION OF EXISTING ROLL GRINDING MACHINES". In 57° Seminário de Laminação e Conformação de Metais. São Paulo: Editora Blucher, 2022. http://dx.doi.org/10.5151/2594-5297-34860.

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3

AHMED, SB. "VIBRATION FROM HAND-HELD GRINDING MACHINES WITH PARTICULAR REFERENCE TO GRINDING WHEEL UNBALANCE". In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19824.

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4

Bifano, Thomas, Helen Caggiano e Raji Krishnamoorthy. "Electrolytic Dressing of Bronze-Bondel Grinding Wheels in Fixed-Load Grinding". In Optical Fabrication and Testing. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/oft.1994.omc7.

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Abstract (sommario):

When using bronze-bonded diamond grinding wheels, no methods of intermittent or in-process dressing have been automated to the point where sharp, continuous cutting performance can be obtained over the life of the grinding wheel when grinding hard ceramics. ELID may provide the first such continuous-dressing technique for ceramic grinding with metal-bonded wheels. With ELID, the wheel is made the anode in an electrolytic cell - a system of two electrodes and an electrolyte undergoing an electrochemical process as the result of an electric potential applied across the electrodes (note the distinction from an electrochemical cell, which generates an electrical potential in response to spontaneous electrochemical reactions between electrodes and electrolyte). The grinding coolant serves as an electrolyte, and a graphite cathode completes the cell. An applied voltage across the electrodes causes the anodic wheel bond to be continuously eroded, exposing sharp, new diamond grains before the already exposed diamonds become unacceptably dull. The graphite cathode evolves hydrogen gas, and neither gains nor loses material in the process. All of the ELID systems described to date use cast iron for cast iron fiber bonded grinding wheels, though such wheels are not common in the US [1]. Experiments have been performed at Boston University using two load-controlled grinding machines. Currently, experiments are also underway on an ultraprecision infeed-controlled grinding machine, with both iron and bronze wheels. The process dynamics for bronze are found to be markedly different than that for iron wheels. The results show significant promise for this technique in ceramic grinding with bronze-bonded wheels.

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Rababah, Mahmoud M., e Zezhong C. Chen. "Five-Axis CNC Tool Grinding: Part I—Rake Face Grinding". In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50014.

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Grinding the helical surfaces in end-mill cutters using two-axis CNC machines is well investigated in literature. However, the grinding wheels do not have explicit geometric representations and the produced helical angles differ from the designed values. Moreover, to the best knowledge of the authors, no reliable and robust algorithm exists to grind generic shape cutters with constant normal rake angles. Thus, the first part of this work introduces a five-axis grinding process that keeps the normal rake angle constant along the rake face. The parameters that affect the shape of the tool flutes are also analyzed and studied in this part. These parameters are then optimized in the second part to obtain optimum wheel shapes grinding the tool flutes along optimum paths. Overall, the grinding process proposed grinds the tool flutes with close matching to the designed ones and replaces the complex wheel shapes commonly used by simple prismatic ones.

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6

Vicharev, S. N. "Automatic Control of Operation of the Knife Grinding Machines". In 2019 International Science and Technology Conference "EastConf". IEEE, 2019. http://dx.doi.org/10.1109/eastconf.2019.8725416.

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7

Timm, Matthias, Christian Adler, Olaf Mewes e Heinrich Moedden. "Improved Design Conventions for Separating Guards of Grinding Machines". In Proceedings of the 29th European Safety and Reliability Conference (ESREL). Singapore: Research Publishing Services, 2020. http://dx.doi.org/10.3850/978-981-14-8593-0_4004-cd.

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8

Yudin, Sergey, e Pavel Pereverzev. "A model for calculating elastic deformations when grinding the outer end surface on circular grinding machines". In 13TH INTERNATIONAL SCIENTIFIC CONFERENCE ON AERONAUTICS, AUTOMOTIVE AND RAILWAY ENGINEERING AND TECHNOLOGIES (BulTrans-2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0101177.

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9

Trujillo Vilches, Francisco Javier, Manuel Herrera Fernández, Carolina Bermudo Gamboa e Lorenzo Sevilla Hurtado. "Virtual Modeling of the Brown and Sharpe’s Universal Grinding Machine from 1877". In 10th Manufacturing Engineering Society International Conference. Switzerland: Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-kexm3g.

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Abstract (sommario):

The grinding processes of shaping materials are one of the oldest known. However, the first grinding machine tool did not appear until the beginning of the 19th century. Industries as important as the automobile would not have been possible without its invention. One of the machine tools that made this development possible was the universal grinding machine patented by Joseph R. Brown in 1877. Unfortunately, none of these early machine tools have been preserved and only the patent remains. Therefore, in this work, a virtual model of this first universal grinding machine has been developed by applying reverse engineering techniques. For this purpose, the existing data in the patent and in some machine treatises of that time have been used. Based on this information, the functionality of each of its components have been interpreted and analyzed. Starting from a set of hypotheses, a scaled and parameterized functional 3D model has been developed. Additionally, a kinematic study of the grinding wheel drive system has been carried out. Hence, this digital model ensures the durability of an important piece of the universal industrial heritage. Furthermore, it can be used as a teaching tool for engineering students, showing the operation of a machine tool belonging to a historical context different from the current one, which does not differ substantially in its architecture of modern universal grinding machines.

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10

Yasui, Shouri, e Kazutoshi Sakai. "Design Criteria for Hardturning Machines". In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0739.

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Abstract (sommario):

Abstract The benefits of hardturning include reduced setup costs; shorter tool change times; improved squareness by virtue of the ability to machine cylinder I.D., O.D. and face in one chucking; low energy consumption and elimination of the need to handle grinding sludge and waste fluid. Hardturning has typically been used as a replacement for grinding, in the processing of fitting surfaces or clad surfaces, and other such relatively straightforward applications not requiring sliding. In recent years, however, due to advances in servo and other machine technology, and tool material improvements (CBN, ceramics), hardturning has entered the realm of finishing curved and complex shaped surfaces that have sliding and rolling contacts. This paper will present the machine characteristics developed to meet the ever increasing demand for hardturning process accuracy, and introduce each of the factors which ultimately affected the design of machine components, providing examples where appropriate.

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Rapporti di organizzazioni sul tema "Grinding machines"

1

Bibler, J. E. Effects of imbalance and geometric error on precision grinding machines. Office of Scientific and Technical Information (OSTI), giugno 1997. http://dx.doi.org/10.2172/620596.

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2

Bennett, J. G., P. Goldman, D. C. Williams e C. R. Farrar. A comparison of the dynamic stiffness of the Goldcrown GC-500 grinding machine for three slide designs. Office of Scientific and Technical Information (OSTI), gennaio 1994. http://dx.doi.org/10.2172/10121869.

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3

Rasmussen, D. CRADA with Freeborn Tool Company and Pacific Northwest National Laboratory (PNL-043): Development of an Automated Tool Profile Grinding Machine. Final project report. Office of Scientific and Technical Information (OSTI), marzo 1998. http://dx.doi.org/10.2172/770344.

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4

Machinist crushed to death while cleaning a grinding machine. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, novembre 1996. http://dx.doi.org/10.26616/nioshsface96nj037.

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