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Analysis of ELID-grinding mechanism based on an in-process observation

基于过程观察的 ELID 磨削机理分析

基本信息

批准号：
12555043
负责人：
KATO Teruko
金额：
$ 1.92万
依托单位：
The Institute of Physical and Chemical- Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

Mechanism of ELID-grinding was investigated in this research based on an in-process observation by using a CCD Microscope tribosystem. The oxidation film was generated on the surface of the grinding wheel test specimen by using the effect of the ELID electrolysis. The following conclusions were obtained ; (1) When #400 grinding wheel with oxide layer is used for disk specimen, the friction coefficient shows 0.23〜0.58 under dry condition, and it shows 0.11〜0.38 under lubrication. (2) When #4000 grinding wheel with oxide layer is used for disk specimen, the friction coefficient shows 0.16〜0.76 under dry condition, and it shows 0.15〜0.38 under lubrication condition. (3)When the contact pressure is more than 1.2MPa, specific wear rate(w_s) of cast iron bonded grinding wheel with oxide layer (w_s =1.0×10^<-6>mm^2/N〜9.7×10^<-5>mm^2/N) is lager than that of cast iron bonded grinding wheel without oxide layer (w_s=7.1×10^<-7>mm^2/N〜2.9×10^<-6>mm^2/N). (4) The microscopic mechanism of the ELID grinding wheel for the multi point contact of diamond grain was examined by using the wear map between soft plane and a hard projection. From a practical side, indicator for the ELID-grinding bond material development was proposed. Concretely, wear of metal-free electro-conductive resin bonded material are estimated compared with the cast iron bonded material since moderate range of wear of ELID-grinding wheel is made to the numerical value. By using these results, the feedback system was constructed to the material design at the development stage of ELID-grinding wheel.

本文利用CCD显微摩擦学系统对ELID磨削过程进行了在线观察，研究了ELID磨削的机理。利用ELID电解效应在砂轮试样表面生成氧化膜。结果表明：（1）用400号氧化层砂轮作圆盘试样，在干燥状态下摩擦系数为0.23 <$0.58，在润滑状态下摩擦系数为0.11 <$0.38。(2)用带氧化层的4000号砂轮作圆盘试件时，干态下摩擦系数为0.16 <$0.76，润滑态下摩擦系数为0.15 <$0.38。（3）当接触压力大于1.2MPa时，有氧化层的铸铁结合剂砂轮的比磨损率（w_s =1.0×10^<-6>mm^2/N <$9.7 ×10^<-5>mm^2/N）大于无氧化层的铸铁结合剂砂轮的比磨损率（w_s=7.1×10^<-7>mm^2/N <$2.9 ×10^<-6>mm^2/N）。(4)利用金刚石磨粒多点接触的ELID砂轮软平面与硬投影间的磨损图，探讨了ELID砂轮的微观机理。从实用角度提出了ELID磨削结合剂材料的发展指标。具体地说，由于ELID砂轮的中等磨损范围的数值，与铸铁结合剂材料相比，估计无金属导电树脂结合剂材料的磨损。利用这些结果，建立了ELID砂轮材料设计的反馈系统。