摘要
针对微细金刚石磨粒很难从金属结合剂砂轮的胎体中出刃的问题 ,开发出一种新修锐方法 -接触放电修锐。它采用一种旋转复合电极修整轮与砂轮接触磨削 ,在金属结合剂胎体与电极间产生微小的脉冲放电 ,逐渐去除砂轮的金属结合剂 ,使微细金刚石在砂轮工作表面出刃 ,达到精密修锐的目的。通过对金属结合剂 #60 0金刚石砂轮进行修锐实验 ,研究其有效性、修锐条件和实际应用。实验表明 ,该修锐方法不仅不损伤微细金刚石磨粒出刃刃角 ,而且还可以消除磨粒周围的结合剂尾状物 ,产生较好的容屑空间。磨削光学玻璃 (BK10 )的试验结果显示它比机械修锐能够更好地提高磨削表面质量 ,Ra达到 0 12 μm。
It is difficult for fine diamond grit to protrude from metal bond wheel. Therefore, we developed a new dressing method, namely electro-contact discharge dressing. It utilizes rotary hybrid dresser as an electrode to contact grinding wheel to produce continued micro discharge between metal matrix and electrode, and remove metal bond around grit gradually to realize precision dressing. Experiment for metal bonded #600 diamond grinding wheel is carried out to investigate dressing parameters and actual application for electro-contact discharge dressing. It is confirmed that this method does not damage diamond grit and can eliminate the bond tail behind grit which obstructs precision grinding. Grinding experiment for optic glass shows that in the comparison with mechanical dressing, it can improve grinding surface quality to Ra=0.12μm.
出处
《金刚石与磨料磨具工程》
CAS
2004年第6期27-30,共4页
Diamond & Abrasives Engineering
关键词
金刚石砂轮
接触放电修锐
磨粒出刃
磨削
diamond grinding wheel
electro-contact discharge dressing
grit protrusion
grinding
