电镀砂轮磨粒等高性影响磨削性能研究

Research on influences of grain height consistency on grinding performance of electroplated wheel

为解决电镀砂轮表面磨粒等高性差导致的磨削性能不佳的问题,提出磨粒等高性的测量方法和量化指标(H_r和H_s),采用金刚石滚轮对砂轮进行微量修整,检测磨削功率和磨削表面质量以评价砂轮磨削性能,分析磨粒等高性与砂轮磨削性能的关系。实验结果表明:微量修整可以明显提高电镀砂轮表面磨粒的等高性,从而改善磨削表面振纹和粗糙度,但应防止修整钝化;为获得良好修整效果,通过H_r定量分析,修整前H_r值不能大于磨粒直径的30%,修整后不宜大于磨粒直径的8%。

To solve the problem of poor grinding capability of electroplated grinding wheel caused by the difference of height consistency of grains on surface electroplated grinding wheel, the measurement methods and quantification indexes （Hr and Hs） were proposed. Meanwhile, a precise dressing was carried out for the grinding wheel with a diamond roller, and the grinding performance was evaluated through monitoring the grinding power and grinding surface quality,and then, the correlation between grain height consistency and grinding performance of grinding wheel was analyzed. The results demonstrate that precise dressing can improve grain height consistency on the surface of electroplated grinding wheel distinctly, which can also improve the chatter mark and roughness of the grinding surface; however, blunt dressing should be avoided. In order to achieve great dressing effects, the value of Hr before dressing should not exceed 30% of the grain diameters and the value of Hr should not exceed 8% of the grain diameters after dressing based on Hr quantitative analysis.