导电加热切削加热电阻特性研究  

Research on Heating Resistance characteristic in Electric Hot Machining

作　　者：刘新[1] 徐文骥[1] 孙晶[1] 张琳[1] 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《电加工与模具》2011年第6期49-53,59,共6页Electromachining & Mould

基　　金：辽宁省科技计划资助项目(2009220022)

摘　　要：导电加热切削是通过切削区加热电阻产生的焦耳热,软化被加工材料而改善材料的切削加工性能。在对加热电阻三维建模的基础上,提出加热电阻由金属材料电阻和收缩电阻组成。通过正交回归试验,得到加热电阻的经验公式,证明加热电阻随转速、加热电流的增大而增大,随进给量、切削深度的增大而减小。通过方差分析和验证实验对所建立的加热电阻经验公式进行验证,结果表明各加工参数中加热电流对加热电阻的影响最大,进给量对加热电阻的影响最小。Electric hot machining （EHM） is a manufacturing method which uses joule heat generated by the heating resistance in the cutting area to soften machined material in order to improve its machinability. 3D modeling of the heating resistance in EHM showed that the heating resistance con- sisted of resistance from the metal material and constriction resistance. With the orthogonal regression experiments, empirical equation for heating resistance was established, which shows that the heating resistance increases with the rising of heating current but decreases with feeding and cutting depth. The variance analysis and confirmatory experiments were adopted to verify our empirical equation, the results showed that in all the cutting parameters, the heating current had the largest influence to the heating resistance, and influence of the feeding is the smallest.

关 键 词：导电加热切削 加热电阻 收缩电阻 三维建模 

分 类 号：TG66[金属学及工艺—金属切削加工及机床]