基于主轴电流及切削力信号的不锈钢扩削试验研究
2018-10-19
作者：裴江涛，李嫚，韩旭，王帅康
单位：大连理工大学
摘要：采用扩孔钻对两种牌号不锈钢材料进行扩削加工试验，实时采集了机床主轴电流及切削力的动态信号。通过分析进给量和转速对两种监测信号的影响研究了其静态特性，结果表明：切削力及主轴电流都随进给量的增大而增大，随转速的增大而减小；主轴电流与水平力有较好的一致性，其主要影响因素是材料塑性及断屑条件；轴向力呈现出与水平力不同的规律，材料的硬度强度是其主要影响因素。此外，对两种信号的动态特性亦进行了对比分析，结果表明：在扩削初始切入阶段，水平力及主轴电流的动态信号均呈相同的变化趋势，而轴向力则不同，这是因为扩削切入阶段刀—屑之间摩擦系数的变化对轴向力影响较小所致。
关键词：不锈钢；主轴电流；切削力；静态特性；动态特性
中图分类号：TG506.7；TH142.2文献标志码：A
Experimental Research on Stainless Steel Expansion Based on
Spindle Current and Cutting Force Signal
Pei Jiangtao，Li Man，Han Xu，Wang Shuaikang
Abstract:Two kinds of stainless steel materials are expanded by the reaming drill in the experiment，and the dynamic signal of the cutting force and spindle current of the machine tool is collected in real time.The static characteristics of the two kinds of monitoring signals are studied by analyzing the influence of feed rate and cutting speed on them.The results show that the cutting force and spindle current go up with the increase of feed rate and go down with the increase of speed；there is a good consistency between the spindle current and the horizontal force，and the main influencing factors are the plastic and chip breaking conditions of the material.The law of axial force is different from that of horizontal force，its main influencing factors are the hardness and strength of the material.In addition，the dynamic characteristics of the two kinds of signals are also compared and analyzed，and the results show that the dynamic signals of horizontal force and spindle current all have the same trend in the initial cutting stage，while the axial force is different，this is because the change of the coefficient of friction between the cutters in the cutting stage has little effect on the axial force.
Keywords:stainless steel；spindle current；cutting force；static characteristics；dynamic characteristics