Friction coefficient of nano-ceramic polished by oxide film on elidgrinding wheel
- 作者：Jicai KuaiFeihu Zhang
- 会议时间：2012-10-19
- 关键词：ELID grinding technology ; oxide film ; coefficient of friction ; nano-ceramic ; polishing
- 作者单位：Jicai Kuai(School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, 454000, China)Feihu Zhang(College of Mechanical Engineering, Harbin Institute of Technology, Harbin, 150001, China)
- 母体文献：2012年中国(国际)光整加工技术及表面工程学术会议论文集
- 会议名称：2012年中国(国际)光整加工技术及表面工程学术会议
- 会议地点：无锡
- 主办单位：中国机械工程学会
- 语种：chi
摘要
In ELID (Electrolytic In process Dressing) grinding, the oxide film on grinding wheel plays an important role inimproving the quality of grinding surface for its assisting polishing function. The tribological properties of the oxide filmand the grinding work piece reflect the polishing effect of oxide film. However, the oxide film is always changing anddynamically updated, therefore, its tribological properties are constantly changing, so it is difficult to obtain the accuratetribological properties when the ELID grinding is conducted. In this paper, the dynamic changes of the friction properties ofthe oxide film are characterized by the dynamic changes of the ELID grinding force. The tangential force and normal forceare used to represent the friction coefficient in order to obtain the accurate real-time friction coefficient of oxide film.Therefore, the friction coefficient of various grinding wheels with different bonding agents, various grinding parameters,various grinding materials (nano- Al2O3 ceramic, nano ZrO2 ceramic and ordinary ZrO2 ceramic), and ELID grinding andordinary grinding can be further studied. The results show that: the friction coefficient of the oxide film on the bronze-basedgrinding wheel is greater than that composed by iron; the friction coefficient of the oxide film decreases with the increase ingrinding depth and feeding speed; the friction coefficient of the oxide film and nano-materials is smaller than that of theoxide film and ordinary materials; the transformation from γ-Fe2O3 to α-Fe2O3 in oxide film and the elastic deformation ofthe oxide film caused by the high-temperature of grinding may make the friction coefficient of ELID grinding greater thanthat of ordinary grinding, so the oxide film contains better property of friction and polishing. Therefore, excellent surfacequality is easier to be obtained by it compared with the ordinary grinding technology.