摘要
本文的实验结果说明了已加工表面上的犁沟是积屑瘤前端切出来的,犁沟的横截面廓形能在150～310mm或更长的切削路程上保持不变。实验结果还说明积屑瘤比鳞刺稳定100倍以上。本文作者对鳞刺形成作了实验观察,发现节状切屑、积屑瘤和切削刃钝圆均能导致鳞刺的形成;并认为这三种原因导致的鳞刺的形成的过程和机理在本质上也是相同的;节状切屑、积屑瘤和切削刃钝圆之所以能导致鳞刺,完全是由于在它们的前方都能形成层积金属。
It is proved experimentally in this paper that the plowinggroove on the machined surface is cut by the bue built-up edge overhang. The cross section profile of the plowing-groove may keep unchanged in a cutting path of 150-310mm or longer. Experimental result shows that the stability of the bue is over one hundred times higher than that of the scale. The experimental observation on the formation of a scale has been done by the present author, who noticed that the discontinuous chip, the bue and the rounded edge of a tool all may cause the formation of the scale. The author thinks that the processed and the mechanisms of the formation of scale under these three conditions are essentially the same, i. e. scales are all constituted by the accumulated metal. It is because the accumulated metal can be lumped in front of a discontinuous chip, a bue and a rounded cutting edge of a tool hence the formation of scale on the occasions.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1989年第2期1-12,共12页
Journal of South China University of Technology(Natural Science Edition)
基金
国家教委资助项目
关键词
金属切削
积屑瘤
切削机理
犁沟
metal cutting
built-up edge
stability
mechanism of cutting
scal
accumulated metal
forming mechanism
