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.