摘要
针对传统磨具很难对陶瓷圆柱滚子进行光滑无损伤表面加工的问题,提出了使用纳米多晶金刚石磨具对圆柱滚子进行研磨,为提高磨具中磨粒的分散性,采用聚丙烯腈凝胶法制备纳米多晶金刚石磨具,研究不同磨具砂结比、研磨压力、研磨速度条件下对圆柱滚子表面粗糙度和材料去除率的影响,并与酚醛热压磨具进行对比。试验结果表明:凝胶磨具中纳米金刚石分布均匀,没有出现明显的团聚现象。当砂结比为10、驱动辊转速为300r/min、研磨压力为0.5 MPa时,对陶瓷圆柱滚子研磨30 min,表面粗糙度Ra的值从0.32μm降到0.07μm。
It is difficult to obtain smooth and non- damage surface of ceramic cylindrical rollers by traditional abrasive tool,the polycrystalline nano- diamond abrasive tool is used for grinding cylindrical rollers. The polycrystalline nano-diamond abrasive tool is prepared by using polyacrylonitrile gel method to improve dispersibility of abrasive particles in abrasive tool. The influence of different abrasive grit ratio of abrasive tool,grinding pressure and grinding speed on surface roughness and material remove rate is studied,and contrast experiment is carried out for phenolic autoclave abrasive tool. The experiment result shows that the nano- diamond in gel abrasive tool is uniformly distributed and it has no obvious agglomerate phenomenon. The surface roughness Ra of ceramic cylindrical rollers decrease from 0. 32 μm to0. 07 μm after grinding 30 min under the parameters of abrasive grit ratio 10,grinding speed 300 r/min,grinding pressure 0. 5 MPa.
出处
《轴承》
北大核心
2015年第12期14-18,共5页
Bearing
基金
国家自然科学基金项目(51275272)
关键词
圆柱滚子轴承
陶瓷滚子
纳米多晶金刚石
凝胶磨具
研磨
cylindrical roller bearing
ceramic roller
polycrystalline nano-diamond
gel abrasive tool
grinding
