热管刀具的设计及散热性能测试

为设计结构合理的热管刀具,研制了热管性能测试系统,模拟热管在车刀内的工作条件,通过正交试验优化热管使用参数.在此基础上,分别设计了嵌入式、侧压式和槽嵌式3种不同热管植入形式的热管刀具,并进行干车削45#钢实验,以量化评估这几种热管刀具的散热性能.对热管的传热测试结果表明:圆热管和扁热管在受热段长度18 mm、冷却段长度20mm、循环冷却水温度75℃、热管弯曲5°时的传热效果最优.对这几种热管刀具的切削量热实验表明:嵌入式热管刀具中的热管传热效率最高,槽嵌式的次之,侧压式的最弱.

Design and Heat Dissipation Performance Test of Heat Pipe Tool

In order to design heat pipe tools with rational structure,first,a performance test system of heat pipe was developed to simulate the working conditions of heat pipe in the lathe tool.Next,the operation parameters of the heat pipe were optimized by means of orthogonal test.Then,based on the optimization results,three heat pipe tools with different installation forms,including the embedding,the lateral compression and the slot embedding,were designed and fabricated.Finally,an experiment in dry turning of 45# steel was carried out to quantitatively evaluate the heat dissipation performance of the tools.The results of heat dissipation performance test demonstrate that,when the heating length of the evaporator section is 18mm,the cooling length of the condenser section is 20 mm,the temperature of recycling water is 75 ℃ and the bending angle of the heat pipe is 5°,both the round and the flat heat pipes are of the optimum heat transfer performance.In addition,the calorimetric experiment in cutting process show that the heat pipe tool with embedding form possesses the highest heat transfer efficiency,while that with lateral compression form possesses the lowest one.