Готові списки джерел за темами / Diamond-spark grinding

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Добірка наукової літератури з теми "Diamond-spark grinding"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Diamond-spark grinding"

Zhang, Bei, Hong Jun Xu, Yu Can Fu, and Hong Hua Su. "Development of High Performance Monolayer Brazed Diamond Grinding Tool for Ceramics." Advanced Materials Research 135 (October 2010): 388–92. http://dx.doi.org/10.4028/www.scientific.net/amr.135.388.

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This study has developed a new kind of high performance monolayer brazed diamond tool for ceramic grinding. The grit size of the diamond brazed in the grinding wheel surface is 300m, which has never been reported in diamond tools for ceramic precision machining. The experiment has achieved wonderful surface finish of Zirconia workpiece. This does owe to the designed and precision conditioned topography of the new developed grinding wheel. The topography of the grinding wheel before and after dressing has been measured by means of laser triangulation method. Then the Zirconia workpiece has been ground. The obtained Ra value decreases with no spark grinding times and the minimum Ra of the ground surface is 0.11m. The study proved that the brazed large grit diamond tools would realize high efficiency and precision grinding, namely, high performance of ceramic grinding.

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Bączek, Elżbieta. "Technological properties of metallic-diamond tools manufactured by SPS process." Mechanik 91, no. 12 (December 10, 2018): 1140–43. http://dx.doi.org/10.17814/mechanik.2018.12.204.

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This paper presents the results of the technological properties of impregnated diamond tools fabricated via spark plasma sintering (SPS) during the process of grinding and cutting of highpurity oxides ceramics (ZrO2) stabilized with Y2O3 or MgO. As a metal matrix the water atomized tin bronze and steel-based matrix was used. After sintering, an analysis of microstructure was conducted using scanning electron microscopy. The resulting materials were tested for the apparent density determined by Archimedes’ method, Rockwell hardness (scale B), Young’s modulus, as well as for the technological properties. The performance results of obtained diamond composites were compared with commercial diamond wheel fabricated by HP (hot pressing), usually employed in the grinding of ceramics. Results showed that diamond tools based on Cu-Sn and steel, obtained by SPS, may be successfully used as a matrix in the impregnated diamond tools for cutting or grinding of high-purity oxides ceramics.

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Agarwal, Gopal, and Manoj Modi. "Influence of Dielectric Jet Flushing during Electro Discharge Diamond Surface Grinding Process." Advanced Materials Research 652-654 (January 2013): 2187–90. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2187.

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The influence of dielectric jet flushing during Electro Discharge Diamond Surface Grinding (EDDSG) on Ti-6A-4V has been reported in this paper. The metal bonded diamond grinding wheel is used as electrode in Electro Discharge Diamond Surface Grinding process. In this process mechanical grinding is coupled with electrical spark of electrical discharge machine to take up the advantages associated with hybrid machining process. The important input parameters in this investigation were “duty factor”, “wheel speed (rpm)”, “magnitude of current (ampere)” and its “duration (Ton, micro-second)”. The effects of these parameters on outcomes i.e. material removal rate (MRR) and surface roughness (Ra) are measured. The noticeable enhancements in material removal rate and surface finish have been seen during EDDSG of Ti-6Al-4V with effective jet flushing. The performance of EDDSG with jet flushing and without jet flushing has been compared.

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Golabczak, Andrzej, and Robert Swiecik. "Assessment of Energy Consumption and Internal Stresses in Surface Layer in the Abrasive Electro-Discharge Grinding (AEDG) Process." Defect and Diffusion Forum 334-335 (February 2013): 89–96. http://dx.doi.org/10.4028/www.scientific.net/ddf.334-335.89.

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In this work, results have been presented related to the influence of selected electrical parameters of the AEDG process on the energy consumption and state of the internal stresses in the outer layer at this stage of the process, in comparison with conventional grinding. The basis of this work has been possible by investigations of the deep grinding of surfaces of the titanium alloy Ti6Al4V with the use of a CBN grinding wheel and sintered carbide S20S with using diamond grinding wheel with metallic binding agent. For the comparative evaluation of the conventional grinding and AEDG, measurements of the specific grinding energy, energy of the spark discharge and internal stresses in the surface layer have been used.

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Bączek, Elżbieta, Piotr Putyra, Marcin Podsiadło, and Barbara Staniewicz-Brudnik. "Wear resistance of the diamond-impregnated specimens fabricated using the SPS process." Mechanik 90, no. 8-9 (September 11, 2017): 793–95. http://dx.doi.org/10.17814/mechanik.2017.8-9.116.

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This paper presents the tribological properties of the diamond-impregnated specimens in the grinding process of sandstone materials. Obtained metallic-diamond composites were homogenized in Speed Mixer and sintered by SPS (spark plasma sintering). The matrix was prepared from: Cu-Sn (NAM-40 80/20 containing 20% wt. Sn) and Fe-Cu-Sn powders. After consolidation the diamond-impregnated specimens were tested for density using the hydrostatic method, Rockwell’s hardness using B scale and for wear rate on abrasive sandstone using a testing rig specially designed to simulate the tool application conditions.

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Wang, Hai Bin, Yan Ling Guo, Fei Hu Zhang, and Song Bao Luo. "Dressing Electric Spark Parameters of Cast Iron Agglutinant Abrasion Wheel." Applied Mechanics and Materials 121-126 (October 2011): 1625–29. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1625.

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The dedicated wheel dresser was used for the aspheric surface curve grinding device Nanosyhs-300. The dresser can deal with diamond wheel of the cast iron binding agent for electric spark reshaping and on-line electrolysis repairing sharp. Discharge parameter on the reshaping accuracy and efficiency was studied in the reshaping processing. Therefore, a group of discharge parameters for emery wheel dressing were obtained.

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Tong, Fu Qiang, Yong Zhang, and Fei Hu Zhang. "Experimental Study on Ultra-Precision ELID Grinding for Concave Spherical Surface of Carbide." Key Engineering Materials 416 (September 2009): 18–22. http://dx.doi.org/10.4028/www.scientific.net/kem.416.18.

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This paper describes the current situation of spherical grinding for carbide material. The experiment of Concave spherical ELID grinding of generating method for carbide is conducted. Because dressing electrode can’t be installed in limited space due to the small space of concave spherical surfaces and carbide material has good conductivity, the workpiece material was used as dressing electrode in the ELID grinding experiment. According to negative effect of spark discharge in the process of grinding to surface roughness, two methods "ELIDⅡ" and "ELID Ⅲ" were designed. Comparing and analyzing the experimental results, it is confirmed preliminary that the spherical error and surface roughness of the workpiece after "ELIDⅡ" grinding were better than those after the "ELID Ⅲ" grinding. The ELID grinding method using micro diamond powder wheel and using carbide workpiece as dressing electrode is an effective way for spherical ultra-precision grinding for carbide.

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Hryniewicz, P., A. Z. Szeri, and S. Jahanmir. "Application of Lubrication Theory to Fluid Flow in Grinding: Part II—Influence of Wheel and Workpiece Roughness." Journal of Tribology 123, no. 1 (September 26, 2000): 101–7. http://dx.doi.org/10.1115/1.1331278.

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The objective of this study is to model fluid flow in grinding with nonporous wheels. While Part I focused on the flow in a simplified smooth geometry, in this part the wheel surface roughness is introduced. The applicability of the modified Reynolds equation for laminar flows between rough surfaces is verified experimentally in terms of the developed hydrodynamic pressure, using a resin-bonded diamond grinding wheel. The experiments were performed under the spark-out condition (i.e., with the wheel just touching the workpiece) and in actual grinding. Agreement between theory and experiment is shown for Re<100, but a significant discrepancy (most likely due to turbulence) is observed for 300<Re<1500.

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Chen, Shun Tong, and Chih Hsien Chang. "Study on Thinning of a Boron-Doped Polycrystalline Diamond Wheel-Tool by Micro Rotary W-EDM Approach." Applied Mechanics and Materials 217-219 (November 2012): 2167–70. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.2167.

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This study presents a novel approach for using a micro rotary wire Electrical Discharge Machining (micro w-EDM) to thin the grinding-edge of a wheel-tool made from boron-doped polycrystalline composite diamond (PCD). For thinning the PCD, two discharge circuits (a Resistance-Capacitance (RC) circuit and a transistor) were used as power sources to obtain a grinding-edge of less than 10 µm in thickness and high surface quality. The wheel-blank is vertically mounted on a spindle and while rotating is thinned by micro w-EDM along a planned computer numerically controlled path. Experimental results verify that boron-doped PCD can be successfully thinned down to 5 µm in edge-thickness. The study shows it is possible to break (cut) diamonds of 10-µm grain size, leaving smooth surface-exposed diamonds at the cutting edge of the wheel tool. The dimensional and geometrical accuracy of the wheel-tool can be exactly controlled. Raman analysis reveals graphitizing of the PCD caused by local high temperature spark erosion at a peak of 1593 cm-1 in RC discharge circuit machining. The peak at 1332 cm-1 for the transistor circuit method indicates diamond sp3 structure. The surface degenerating layer produced by transistor circuit machining gives a suitably thin grinding edge with exposed diamond grains.

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Hu, Bo, Christopher Lim, Song Lin Ding, M. Zulafif Rahim, Milan Brandt, and John Mo. "Experimental Study of Wheel Rotating Speed Effect on Electrical Discharge Grinding." Applied Mechanics and Materials 697 (November 2014): 275–79. http://dx.doi.org/10.4028/www.scientific.net/amm.697.275.

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Electrical discharge grinding is used to machine polycrystalline diamond layer of cutting tools, which can effectively drill composite/titanium stacks in modern aircraft frames. In the machine, an electrode wheel is rotated to accelerate debris flushing to quickly recover the dielectric fluid between a spark gap. The aim of this study was to investigate the effect of the wheel speed on polycrystalline diamond removal rate for high erosion efficiency. Multiple wheel speeds were applied in a electrical discharge grinding machine under various pulse on-times and the volumetric removal rates were calculated by the precise position feedback of this machine over the time, which was obtained by the electrical waveform of discharges. The experimental results show that the removal rate increases with the wheel speed up to a limit at the low range and then declines at the high range. This indicates that the wheel speed needs to be optimized for high erosion efficiency under various discharge conditions such as different materials and pulse on-times.

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Більше джерел

Дисертації з теми "Diamond-spark grinding"

Руднєв, Олександр Віталійович. "Забезпечення якості двошарових алмазних пластин при алмазно-іскровому шліфуванні на основі аналізу приведеного профілю ріжучої поверхні круга". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29709.

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Анотація:

Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.03.01 – процеси механічної обробки, верстати та інструменти. – Національний технічний університет "Харківський політехнічний інститут". Харків, 2017. Дисертаційна робота присвячена розв'язанню задачі обробки нового інструментального матеріалу дрібнозернистих алмазно-твердосплавних пластин АТПМ, встановленню фізичних особливостей процесу алмазно-іскрового шліфування, встановленню та аналізу якісних закономірностей, досягненню високої продуктивності і найменшою сумарною технологічної собівартості. Досліджувалися фізичні особливості процесу АІШ пластин АТПМ на основі аналізу енергоємності процесу і коефіцієнтів шліфування, представлені особливості зносу алмазних кругів. Встановлено особливості формування шорсткості поверхні обробленого шару надтвердих матеріалів в залежності від приведеного профілю алмазного круга. Визначено на основі стійкісних випробувань оптимальні значення режимів шліфування лезового інструменту, при яких забеспечуються найменші значення технологічної собівартості у споживача.
Thesis for the degree of candidate of technical sciences, specialty 05.03.01 – machining processes, machines and tools. – National Technical University "Kharkov Polytechnic Institute". Kharkov, 2017. The thesis is devoted to the problem of handling the new tool material fine grain diamond-carbide inserts, ATPM, establishing the physical characteristics of the process of diamond-spark grinding, the establishment and analysis of qualitative regularities, to achieve high performance and lowest total technological cost. Studied the physical characteristics of the process of spark-diamond grinding plates, ATPM based on the analysis of the energy intensity of the process and factors of grinding, the features of the wear of diamond wheels. Features of formation of a roughness of a surface processed layer of superhard materials, depending on the given profile of the diamond wheel. Determined on the basis of stoikosty testing the optimal mode of grinding the cutting edge of the instrument, which can obtain the lowest value of the technology cost from the consumer.

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Частини книг з теми "Diamond-spark grinding"

Rudnev, Aleksandr, Yuriy Gutsalenko, Elena Sevidova, Larisa Pupan, and Oksana Titarenko. "Diamond Spark Grinding of Hard Alloys Using Solid Lubricants." In Lecture Notes in Mechanical Engineering, 114–22. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77719-7_12.

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Bhartendu, Kumar, S. K. Jha, and B. K. Bhuyan. "Theoretical and Experimental Estimation of Material Removal Rate of Electric-Spark Diamond Grinding of Difficult-To-Cut Materials." In Lecture Notes in Mechanical Engineering, 1317–33. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-2794-1_112.

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Gutsalenko, Yu G., and А. V. Rudnev. "DIAMOND SPARK GRINDING IN ANHYDRATED MEDIUM USING SOLID LUBRICANTS." In PROSPECTS AND PRIORITIES OF RESEARCH IN SCIENCE AND TECHNOLOGY, 44–59. Izdevnieciba “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-26-008-7.1-3.

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Gutsalenko, Yuriy, and Tetyana Tretyak. "FORMATION OF WORKING SURFACES AND RESEARCH OF QUALITATIVE INDICATORS OF NON-EVOLVENT GEARS (REVIEW AND PROSPECTS OF DEVELOPMENT)." In Integration of traditional and innovation processes of development of modern science. Publishing House “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-26-021-6-35.

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Анотація:

From the standpoint of the development of possibilities of application in theory and practice, the works of Prof. B. A. Perepelitsa from Kharkov Polytechnic Institute and his disciples to develop an applied methodology of multiparameter mappings in relation to the profiling and functioning of complex curvilinear objects and transmission mechanisms in mechanical engineering, mainly with examples of gears, are presented. The work substantiates the relevance of the study of gears with a complex non-involute profile of the side surfaces of the teeth, which in some applications have advantages over involute gears and are devoid of some of their drawbacks associated with quality indicators. A technique for obtaining mating surfaces of the teeth of non-invasive gears as envelopes of the specified surfaces of the teeth of tools is described. A scheme for forming pairs of non-involute gears, from which a gearing can be composed, is proposed. At the same time, diamond-abrasive tools are considered as shaping the working gear profile in its cutting according to the copying scheme and finishing according to the rolling honing scheme. In the first case, the profile of a special shaped tool on a high-strength metal bond is supported by a master electrode according to the scheme of the anodic connection of the tool into the electric circuit of dressing, similar to diamond spark grinding. In the second case, the use of gear wheels-hones on elastic ligaments is shown. It is shown that to obtain the mating surfaces of the teeth of two non-involute gears, two tool rails can be used with the profiles of the side surfaces of the teeth opposite to each other. As a nonlinear profile of the tooth lateral surface of the tool rail, some part of one of the simulated flat kinematic curves is considered. A description of the program developed in accordance with the described method is given, which allows you to calculate the geometric characteristics of the shaped profiles of the gear pair wheels, visualize the shaping process, and also determine the quality indicators of the gearing. Thus, the prerequisites were created for choosing from the resulting geometric modeling of the curve field of such tooth profiles of the tools, which would provide the most rational combination of the tooth profiles of the gears processed by them and the required quality parameters of the gear teeth. The results of the study of the pressure ratio between the teeth of a gear and the overlap ratio of gears when choosing the shape of the tooth profiles are presented. A series of numerical experiments for gearing, formed by pairs of tool rails with different profiles of the side surfaces of the teeth straight, convex and concave, as well as convex-concave were performed. It is shown that non-involute gearing can have large reduced radii of curvature (and consequently smaller pressure coefficients) at the points of tangency of the profiles compared to involute gearing with a slight increase or decrease in the gearing overlap ratio. The most preferable is the variant of the rails with convex and concave tooth profiles, which provides the best values of both quality indicators of the engagement.

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Тези доповідей конференцій з теми "Diamond-spark grinding"

Onishi, Takashi, Yusuke Nakabayashi, Moriaki Sakakura, Go Ichiba, and Kazuhito Ohashi. "Improvement of the Form Accuracy Ground by a Slender Wheel in Internal Grinding." In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8595.

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Abstract In the case of internal grinding of a deep hole, the inner surface of the hole was ground by a slender grinding wheel that has a high aspect ratio. A slender grinding wheel is bent by the normal grinding force during the grinding process. Therefore, the form accuracy of the ground workpiece is decreased especially when the aspect ratio of a wheel is high. In our previous study, it was confirmed that the biggest factor that generated the form error of the workpiece was the elastic deformation owning to the normal grinding force. To reduce the form error of the ground workpiece, it is effective to expand the spark-out duration. However, the expansion of the spark-out duration leads to the low productivity. In this study, the form of the grinding wheel was modified by a diamond dresser to improve the form accuracy of the workpiece without expanding the spark-out duration. The modified form of a wheel was determined to compensate the form error of the workpiece generated by the elastic deformation of the grinding wheel. Thorough several grinding experiment, it was confirmed that the form accuracy of the ground workpiece was successfully improved by modifying the form of a slender grinding wheel without expanding the spark-out duration.

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Miller, Scott F., and Albert J. Shih. "Investigation of the Spark Cycle Effect on Material Removal Rate in Wire Electrical Discharge Machining." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41850.

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The development of new, advanced engineering materials and the needs for precise and flexible prototype and low-volume production have made wire electrical discharge machining (EDM) an important manufacturing process to meet such demand. This research investigates the effect of spark on-time duration and spark on-time ratio, two important EDM process parameters, on the material removal rate (MRR) and surface integrity of four types of advanced material: porous metal foams, metal bond diamond grinding wheels, sintered Nd-Fe-B magnets, and carbon-carbon bipolar plates. An experimental procedure was developed. During the wire EDM, five types of constraints on the MRR due to short circuit, wire breakage, machine slide speed limit, and spark on-time upper and lower limits have been identified. An envelope of feasible EDM process parameters is created and compared across different work-materials. Applications of such process envelope to select process parameters for maximum MRR and for machining of micro features are presented.

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