• Title/Summary/Keyword: 연삭 숫돌 마모

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Estimation and experimental verification of grinding wheel wear in surface grinding process (평면 연삭에서의 연삭 숫돌 마모 추정 및 실험적 검증)

  • 김현수;주광훈;홍성욱;이응숙;박천홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.285-288
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    • 2000
  • This paper deals with the theoretical estimation and its experimental verification of grinding wheel wear in surface grinding process. A theoretical formulation is provided to predict the grinding wheel wear in surface grinding. The associated surface roughness and grinding force are also investigated both theoretically and experimentally. Through a series of simulations and experiments, it is shown that the predictions are in good agreement with the experimental results.

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An Experimental Study on Grinding Performance and Wear of Alumina Grinding Wheels Developed for High Performance Grinding (고능률 연삭용 알루미나 연삭숫돌의 연삭성능 및 마멸에 관한 실험적 연구)

  • Cho, Kisoo;Lee, Jongchan
    • Journal of the Korean Society for Precision Engineering
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    • v.13 no.12
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    • pp.38-45
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    • 1996
  • A new grinding wheel was developed for the high performance grinding of difficult-to-grinding materials. The grinding performance of the newly developed wheel including grinding forces, grinding ratio, and surface roughness of ground surface was evaluated through experiments. Experimental results show that the performance of the newly developed wheel is superior to the conventional alumina wheel and comparable to the Sol-gel wheel. An experimental investigation on the wear of alumina grinding wheel was also carried out. The experiments consist of the measurements of fracture strength of the abrasive grains, grinding force, and the area of wear flats of grinding wheels. Microscopic examination of abrasive grains was executed to observe the progress of wheel wear. The results indicate that the 32A grain, which has relatively lower fracture strength, wears out faster than 5SS and 5SG. The wheel wear occurs much faster in wet grinding than in dry grinding. It has also been found that the grinding forces increase logarithmically with increasing wear flats.

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Diamond wheel과 Ceramics 연삭 가공의 최근 경향

  • Gang, Jae-Hun;Lee, Jae-Gyeong
    • 기계와재료
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    • v.2 no.3 s.5
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    • pp.120-127
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    • 1990
  • 미래지향적 고부가가치의 첨단산업 전반에 걸쳐 기계요소 부품 재료로서 주목받고 있는 화인 세라믹스의 가공에 있어 다이아몬드 연삭 숫돌에 의한 연삭, 절단 가공은 가장 중요한 위치를 차지하고 있는 기계적 제거 가공법이다. 그러나 세라믹스는 고경도, 고강도, 경취성 재료이기 때문에 다이아몬드 지립의 절인 마모가 빨라 능률적인 가공을 장시간 유지하기가 곤란하다. 여기서는 국내 기계 가공 작업 현장에 있어서 부품의 신소재 대체에 따라 필연적으로 사용하게 된 다이아몬드 연삭 숫돌에 대하여 작업자들이 범용 숫돌 사용시의 고정 관념만을 갖고 새로운 공구에 관한 기초 지식이나 Know-how없이 가공작업에 임하는 경우가 많아, 압력 절입 방식에 있어서의 연삭 능률 비교를 중심으로 평면 연삭이나 절단 등의 강제 절입 방식에 있어서의 연삭비, 연삭저항 등의 데이터도 첨부하여 세라믹스 가공을 위한 다이아몬드 연삭공구의 조건에 대해 논하고자 한다.

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Estimation and Experimental Verification of Grinding Wheel Wear in Surface Grinding Process (평면 연삭에서의 연삭 숫돌 마모 추정 및 실험적 검증)

  • Ju, Gwang-Hun;Lee, Eung-Suk;Kim, Hyeon-Su;Hong, Seong-Uk;Park, Cheon-Hong
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.8
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    • pp.150-156
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    • 2001
  • This paper deals with the theoretical estimation and its experimental verification of grinding wheel wear in surface grinding process. A theoretical formulation is provided to predict the grinding wheel wear in surface grinding. To validate the theoretical prediction, the grinding wheel wear is measured by using a laser scanning micrometer. The associated surface roughness and grinding farce are also investigated both theoretically and experimentally. Through a series of simulations and experiments, it is shown that the predictions are in good agreement with the experimental results.

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Monitoring of Grinding Wheel Wear in Surface Grinding (평면 연삭에서의 연삭 숫돌 마모 모니터링)

  • 주광훈;김현수;홍성욱;박천홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.613-616
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    • 2000
  • This paper deals with monitoring of grinding wheel wear in surface grinding process. A laser scanning micrometer is used to measure the circumferential shape as well as the axial shape of grinding wheel. The monitoring system is applied to two kinds of grinding methods: plunge and traverse grinding. Through experiments, it is found that measurement of grinding wheel wear reveals information of roughness of ground surface and the adequate dressing time. In addition, monitoring of grinding wheel wear makes it possible to identify abnormal grinding conditions.

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Monitoring of Grinding Wheel Wear Using Laser Scanning Micrometer (LSM을 이용한 연삭 숫돌 마모 모니터링)

  • Ju, Gwang-Hun;Kim, Hyeon-Su;Hong, Seong-Uk;Park, Cheon-Hong
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.12
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    • pp.82-87
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    • 2000
  • This paper deals with monitoring of grinding wheel wear in grinding process. A monitoring system is developed in which a laser scanning micrometer is used to measure the circumferential shape as well as the axial shape of grinding wheel. The monitoring system is applied to grinding machines. The experiment results show that the monitoring system is useful not only for monitoring the amount of wear in grinding wheel but also for measuring the apparent diameter of the grinding wheel.

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Variation of Grinding Force and Wheel Life in Surface Grinding (평면연삭에서 연삭력 변화와 숫돌수명)

  • Choi, S. S.;Koo, Y.;Kwak, J. S.;Ha, M. K.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.1109-1112
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    • 2001
  • In the grinding process, the edge of shape is very important to evaluate the surface roughness and the precision of dimension. To keep precision of product, parameters with respect to the amount of wheel wear have to limit by grinding condition. In this paper, we measured variation of grinding force to seek the grinding characteristics by the amount of wheel wear in surface grinding. Also, we find out that how these condition give influence to wheel life.

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Simulation and Improvement of Grinding Processes for Linear Motion Guide Blocks (선형가이드용 블록 연삭 공정 시뮬레이션 및 개선에 대한 연구)

  • 조명동;김현수;홍성욱;박천홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.1018-1021
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    • 1997
  • This paper presents a result of simulation and improvement of grinding process for linear motion guide blocks. A simulation software, which is based on cylindrical grinding process. is used to predict the grinding wheel wear during the grinding process. To validate the simulation, the simulation result is compared with the experimental one. Simulation study is extended to obtain an optimal grinding condition for minimizing the grinding wheel wear. The optimal condition is validated through an experiment.

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The Surface Characteristics of Workpiece by Wear of Wheel (숫돌 마모량에 따른 연삭가공물의 표면특성)

  • 곽태경;곽재섭;하만경;이재경
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2001.04a
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    • pp.332-335
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    • 2001
  • The surface roughness is one of the important parameters to evaluate the quality of products. Its level must be limited to a certain range in the precision components. This paper deals with grinding characteristics of workpieces by the wear amount of wheels in the surface grinding process. The surface roughness was measured according to the feedrate and the depth of cut with respect to the various workpieces. In addition, the wear amount of wheels according to the number of grinding pieces was obtained.

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Variation of Grinding Force and Wheel Life in Surface Grinding (평면연삭에서 연삭력 변화와 숫돌수명)

  • Choi, Soung-Sam;Koo, Yang;Kwak, Jae-Seob;Ha, Man-Kyong;Park, No-Kwang
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.3
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    • pp.59-65
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    • 2002
  • In the grinding process, the degree of the sharpness in wheel grain affects the surface roughness and the dimensional accuracy. If a wheel with dull grains is used, te grinding force will be increased and the surface roughness deteriorated. To produce a precision component, the magnitude of parameters related to the wear amount of a grinding wheel has to be limited. In this study, a variation of the grinding force and the surface roughness were measured to seek the machining characteristics of the WA and CBN wheels. From the wear amount of the grinding wheel and the removal rate of workpiece, the grinding ratio was calculated. And also the wheel life was determined at a rapid decreasing point of the grinding ratio. The difference between the surface of wheel-workpiece before grinding and after wheel life was clearly verified with a microscopic photo.