刀具冷却方式对FGH96高温合金切削温度的影响分析  

Analysis of Influence of Tool Cooling Methods on Cutting Temperature of FGH96 High Temperature Alloy

作　　者：张慧[1] Zhang Hui

机构地区：[1]天水师范学院,甘肃省天水市741001

出　　处：《工具技术》2024年第11期87-93,共7页Tool Engineering

基　　金：2020年度甘肃省高等学校创新基金(2020B-182)。

摘　　要：利用有限元模型确定FGH96高温合金的模型参数和力学性能,引入金属切削传热学理论,建立刀具表面温度解析模型,利用切削热来源计算出刀具接触区的切削温度,并提出汽雾冷却的FGH96高温合金冷却方式。以干式冷却、环形浇注和汽雾冷却为实验研究对象,分析各切削参数对高温合金切削性能的影响,包括温度场的径向分布、残余应力、切削力以及切削温度。仿真模拟结果表明:环形浇注、汽雾冷却的孔壁温度对比干式冷却方法分别下降48.8%和109.3%;汽雾冷却残余应力与切削力均最小;切削速度、进给量和切削深度的增加会使切削温度增加,汽雾冷却的最优切削温度为678.59℃,影响切削温度因素依次为进给量>切削速度>切削深度。研究结果揭示了不同冷却方式对这些因素的综合作用,为优化切削工艺和提高加工质量提供了重要依据。The finite element model is used to determine the model parameters and mechanical properties of FGH96 high-temperature alloy.Base on the theory of metal cutting heat transfer,an analytical model for tool surface temperature is established.The cutting temperature in the tool contact area is calculated using the cutting heat source,and a temperature cutting method for FGH96 high-temperature alloy using vapor mist cooling is proposed.Three cooling methods,dry casting,annular casting,and vapor mist cooling,are used as experimental research objects to analyze the influence of various cutting variable parameters on the cutting nature of high-temperature alloys.The experimental study research results show that the temperature at the hole wall of annular casting and vapor mist cooling decreases by approximately 48.8%and 109.3%compared to dry cooling methods;The residual stress and cutting force of vapor mist cooling are the smallest;The increase in cutting speed,feed rate,and cutting depth will increase the chip temperature,and the optimal cutting temperature for vapor mist cooling is 678.59℃.The influencing factors of chip temperature in descending order are feed rate>cutting speed>cutting depth.The influence parameter variables of high-temperature alloy cutting temperature are obtained,which have a significant impact on cutting temperature and cutting effect.

关 键 词：高温合金材料 刀具冷却方式 汽雾冷却 有限元模型 冷却换热 切削温度 

分 类 号：TG501.5[金属学及工艺—金属切削加工及机床] TH16[机械工程—机械制造及自动化]