高速干式滚齿切削热力耦合与工艺参数分析

Research on thermal-force coupling and processing parameter of high-speed dry hobbing

为了方便优化高速干式切削工艺,对高速干式滚齿机切削进行热力耦合和工艺参数影响分析。首先结合高速干式滚齿加工的技术特点,对干式滚齿中切削力和切削温度场进行了理论建模。在此基础上,对滚刀单个刀齿的切削温度场进行有限元仿真分析,以获得滚刀前刀面的切削温度分布情况,实现仿真研究滚齿切削的可能性。然后以最高切削温度为研究目标,分析进给量、滚刀转速等工艺参数对滚齿加工过程的影响。最后在滚齿机上展开了干式滚齿切削实验。结果表明:随着滚刀转速的提升机床切削温度快速升高后慢慢降低并趋于稳定,且高转速有利于节约能耗;研究结果可对切削工艺的优化策略提供指导,为滚齿机的设计制造提供理论基础。

In order to optimize the processing of the high-speed dry hobbing machining,the thermal-force coupling and the influences of processing parameters were analyzed. At first,theoretical modeling of cutting force and cutting temperature of dry hobbing machining was established based on the technical features of high-speed dry hobbing. On the basis,FEM simulation analysis of cutting temperature of each hobbing cutter teeth was proposed to obtain the temperature distribution of the rake face of hobbing cutter. It lays the basis of simulation study of hobbing machining. Then,the influences of feed rate and speed of hobbing cutter on hobbing machining was analyzed with the goal of highest cutting temperature. Finally,experiments of high-speed dry hobbing machining were proposed. The results show that the cutting temperature rises rapidly and then tends to reduce and stabilize slowly as the rise of the rotation speed of hobbing cutter. The high speed can save energy consumption. The research provides the guidance for the optimizing strategy of the processing of high-speed dry hobbing machining,and it lays the a theoretical basis for the design and manufacture of the hobbing machine.