• Title/Summary/Keyword: Grinding wheel wear

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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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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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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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A Study on the Dressing of Laminated Grinding Wheel and the Surface Roughness of Ground Parts (적층연삭숫돌의 드레싱과 연삭물 표면거칠기에 관한 연구)

  • Kim, Kang
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.7
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    • pp.63-69
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    • 2003
  • Through the previous works, it was found that the laminated grinding wheel is more efficient to generate smoother surface in short time than general grinding wheels. But, if the laminated grinding wheel is easily worn-out, it is impossible to apply this wheel in the real grinding process, because the periodic time for dressing is closely linked to the productivity of the process. So, it is required to investigate the wear of the laminated grinding wheel fer studying the periodic time for dressing. But it is difficult to analyze the dressing period quantitavely. Therefore, in this study, periodic times for dressing of the laminated grinding wheel and general grinding wheel are deduced from the relationship between the wear of grinding wheels and the surface roughness changes according to the number of traverse in cylindrical traverse grinding through experiments. This study shows that there are some differences in the wheel wear mechanisms between the general and laminated grinding wheels. As a result, it is also found that the periodic time for dressing of the laminated grinding wheel is longer than that of the general grinding wheel.

Monitoring of Grinding Wheel Wear in Surface Grinding Process by Using Laser Scanning Micrometer

  • Ju, Kwang-Hun;Kim, Hyun-Soo;Hong, Seong-Wook;Park, Chun-Hong
    • International Journal of Precision Engineering and Manufacturing
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    • v.2 no.1
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    • pp.81-86
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    • 2001
  • This paper deals with the monitoring of grinding wheel wear in surface grinding process. A monitoring system, which makes use of a laser scanning micrometer, is developed to measure the circumferential shape as well as the axial profile of grinding wheel. The monitoring system is applied to surface grinding processes. The experimental results show that the developed monitoring system is useful not only for monitoring the amount of wear in grinding wheel but also for evaluation the quality of ground surface and determining proper derssing time for the grinding wheel.

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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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Prediction of Wheel Wear when Surface Grinding by Dual Detection Methods (평면연삭시 복합검출방법에 의한 숫돌마멸 예측)

  • 왕덕현
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1998.03a
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    • pp.172-177
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    • 1998
  • An experimental study on the prediction of grinding wheel wear by dual detection methods was conducted by the laser displacement and acoustic emission(AE) system. The laser displacement sensor was located above the head of the grinding wheel and the AE sensor was set under the workpiece, where the wheel were condition can be detected. It was found that the dual detection methods by laser displacement system and AE system made it possible to predict the wheel wear. From the experiments, the root mean square(RMS) values both methods was found to be proportional to the grinding wheel wear.

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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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An Experimental Study on the Wear of Alumina Grinding Wheels (알루미나 연삭숫돌의 마모에 관한 실험적 연구)

  • Cho, Ki-Su;Lee, Jong-Chan;Choi, Hwan
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1994.10a
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    • pp.113-118
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    • 1994
  • An experimental investigation on the wear of alumina grinding wheel is presented. The experiments consist of the measurements of fracture strength of the abrasive grains, grinding forces, and the area of wear flats of grinding wheels. Microscopic examinations of abrasive grains were also carried out to observe the progress of wheel wear. the results show 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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Grinding Characteristics and Wear Behavior of Diamond Wheel in Ceramic Grinding (세라믹 연삭에서 다이아몬드 휠의 연삭 특성 및 마멸 거동)

  • 박병규;문홍현;김성청
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.12 no.5
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    • pp.8-14
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    • 2003
  • The characteristics of grinding and wear behavior of diamond wheel for grinding ceramic materials was investigated in this study. In case of $Si_3N_4$, the wear of wheel was large, the finding force was relatively stable and the fluctuation of surface roughness n small. On the other hand in case of $Al_2O_3$ and $ZrO_2$, the wear of wheel and surface roughness were decreasing, the grinding force was increasing. During grinding with vitrified bond wheel, $Si_3N_4$ shows renewal of cutting edge while $Al_2O_3$ and $ZrO_2$ show glazing phenomenon of cutting grains. We have found that it possible to observe the behavior of grinding wheel by grinding ratio, grinding resistance, surface roughness and cutting edge ratio. Through the grinding experiments, it was found that grinding life of diamond wheel is 20 times for $Si_3N_4$, and 40 times fir $Al_2O_3$ and $ZrO_2$.