• Title/Summary/Keyword: 크?피드 연삭

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A Study on Heat Source Model to Creep Feed Grinding (크?피드 연삭에서 열원 모델에 관한 연구)

  • Jeong, Jong-Dal;Jeong, Hae-Do;Choe, Heon-Jong;Kim, Nam-Gyeong
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.2
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    • pp.171-176
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    • 2001
  • This study focuses on the energy partition and heat flux distribution in creep-feed grinding. From the measurements of transient grinding temperature in the workpiece which the thermocouple was embedded, the overall energy partition to the workpiece was estimated with moving heat source theory using the developed scalene triangle heat model. The energy partition was calculated as 3.75% in down grinding smaller than 5.3% in up grinding. Also, the scalene triangle heat model was confirmed as the most optional heat model in correspond to the experimental data. Then, the heat flux distribution was calculated from temperature responses. The heat flux is negative behind the grinding zone where fluid was applied. In this experimental result, the total heat flow to the workpiece per unit width obtained by integrating the positive heat flux was 0,7W/mm for down grinding.

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Energy Partition to Workpiece in Creep feed Grinding (크맆피드연삭에서 공작물로 유입되는 에너지 비율)

  • 홍순익
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.7 no.6
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    • pp.42-48
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    • 1998
  • This paper is concerned with the heat flux distribution and energy partition for creep-feed grinding. From measurements of transient grinding temperatures in the workpiece sub-surface using an embedded thermocouple, the overall energy partition to the workpiece was estimated from moving heat source theory for a triangular heat flux distribution as 3.0% for down grinding and 4.5% for up grinding. The higher energy partition for up grinding can be attribute to the need to satisfy thermal compatibility at the grinding zone. The influence of cooling outside the grinding zone can be analytically taken into account by specifying convective heat transfer coefficients on the workpiece surface ha ahead of the heat source (grinding zone) and hb behind the heat source. The smaller energy partition together with slightly lower grinding power favors down grinding over up grinding.

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Energy Partition to Workpiece in Creep feed Grinding (크리피드연삭에서 공작물로 유입되는 에너지 비율)

  • 김남경;박호성;홍순익;송지복
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.799-804
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    • 1997
  • This paper is concerned with the heat flux distribution and energy partition for creep-feed grinding. Form measurements of transient grinding temperatures in the workpiece sub-surface using an embeded thermocouple, the overall energy partition to the workpiece was estimated form moving heat source theory for a triangular heat flux distribution as 3.0% for down grinding and 4.5% for up grinding. The higher energy partition for up grinding can be attributed to the need to satisfy thermal compatibility at the grinding zone. The influence of cooling outside the grinding zone can be analytically taken into account by specifying convective heat transfer coefficients on the workpiecs surface h /sab a/ heat source (grinding zone) and h /sab b/ behind the heat source. The smaller energy patition together with slightly lower grinding power favors down grinding over up grinding.

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