导电加热小孔钻削的温度仿真与试验研究  

Temperature Simulation and Experimental Investigation of Electric Hot Minipore Drilling

作　　者：徐兰英[1] 伍强[2] 胡小芳[1] 叶邦彦[1] 李玉忠[2] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广东技术师范学院数控技术广东普通高校重点实验室,广东广州510635

出　　处：《华南理工大学学报（自然科学版）》2011年第1期95-99,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：中国博士后科学基金资助项目(20090450865);表面功能结构先进制造广东普通高校重点实验室开放基金资助项目(SFS2010-05);2009年广东技术师范学院校级科研项目(09KJQ16)

摘　　要：基于非稳态热传导温度场建立钻削温度的有限元模型,动态模拟钻削区平均温度,得出切屑和工件的温度场分布.采用单因素试验分别研究了切削速度、进给量和钻头直径等对钻削温度的影响,利用K型热电偶测量工件材料钻削区的平均温度.有限元模拟的温度数值与实测数值吻合,验证了有限元模型的正确性.采用正交试验对不锈钢1Crl8Ni9Ti在导电加热钻削下的钻削温度进行拟合,获得了导电加热钻削温度的经验公式,发现对钻削温度影响最大的是切削速度,进给量次之,直径的影响最小.In this paper,a finite element model of drilling temperature was established based on the unsteady-state heat-conduction temperature field,and the temperature field distributions of both the chip and the workpiece were obtained by dynamically simulating the average temperature of the drilling area.Then,some single-factor experiments were carried out to reveal the effects of cutting speed,feed and drill bit diameter on the drilling temperature,and the average temperature of the drilling area was measured using a K-type thermocouple.The simulated temperature accords with the experimental one,which verifies the proposed finite element model.In addition,according to the fitting results of drilling temperature of stainless steel 1Crl8Ni9Ti obtained by orthogonal experiments,an empi-rical formula is deduced,from which it is found that the above-mentioned factors affect the drilling temperature in order of cutting speedfeed drill pit diameter.

关 键 词：钻削 导电加热 热力耦合 仿真 拟合 

分 类 号：TG52[金属学及工艺—金属切削加工及机床]