摘要
本文建立了基于未变形磨屑厚度的磨削力计算模型。根据55号钢的CBN砂轮平面磨削实验,首先采用随机方向搜索法对切向力模型进行优化拟合,再根据拟合的参数对法向力模型进行优化,得出了CBN砂轮与工件之间的摩擦系数和磨粒顶锥角。分析了摩擦力在磨削力中所占比重的影响因素,结果表明:当切深不变时,随着vs/vw比值的增加,磨削力以及摩擦力在磨削力中所占的比重均下降,但当磨粒间距增加时,磨削力减小,而摩擦力在磨削力中所占比重增加。
The paper presents the calculation model of grinding force based on undeformed chip thickness. According to the grinding experiments of steel 55 during surface grinding with CBN grinding wheel, the restrictive random direction method is adopted to optimize the parameters of the tangential force model first, and then the normal force model is optimized based on the these parameters. After that, the cone angle of abrasive grain and the friction between the CBN grinding wheel and workpiece are obtained. Finally , the influence factors of the ratio of friction force to the grinding force is analyzed in this paper. The results show that at the same grinding depth, both the ratio of frictional force to the grinding force and the grinding force will decrease with the increase of the velocity ratio v s/v w, but with the increase of inter-grain space the grinding force decreases while the ratio of frictional force to the grinding force increases .
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2010年第1期67-70,79,共5页
Diamond & Abrasives Engineering
基金
湖北水院教学科研基金:hbsy2009cx20
高等学校博士学科点专项科研基金:20070487042
关键词
55钢
平面磨削
磨削力模型
随机方向搜索法
steel 55
surface grinding
grinding force model
restrictive random direction method
