钛合金Ti6Al4V与铝合金Al7075-T651钻削性能仿真对比分析  

Finite Element Simulation Comparative Analysis of Drilling Performance of Titanium Alloy and Aluminum Alloy

作　　者：梁桂强 刘昂驰 高源 LIANG Gui-qiang;LIU Ang-chi;GAO Yuan(Hunan Ling Hang Science and Technology Innovation Education Technology Co.,Ltd.,Xiangtan 411101,China;School of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China;不详)

机构地区：[1]湖南领航科创教育科技有限公司,湘潭411101 [2]湖南工程学院机械工程学院,湘潭411104 [3]北京领航科工教育科技有限公司,湘潭411104

出　　处：《组合机床与自动化加工技术》2023年第4期133-136,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：湘潭市科技重点研发项目(CG-YB20191001)。

摘　　要：为了探究不同材料的钻削加工机理,对比分析了钛合金Ti6Al4V和铝合金Al7075-T651的钻削加工。通过有限元软件ABAQUS对钻削过程进行仿真研究,在有/无热力耦合工况下对工件应力应变、钻削力、摩擦力及能量等方面分析Ti6Al4V和Al7075-T651的差异。仿真结果表明,在非热力耦合模型中,铝合金出口处切屑以帽盖的形式去除,而钛合金则以C形切屑去除;在热力耦合的模型中,钛合金和铝合金的工件最大应力首先位于钻头横刃挤压处,随着钻头的深入,工件最大应力位于钻头主切削刃处;对比有/无热力耦合模型,发现钻削力受温度的影响最显著,其次为摩擦力,最后为塑性能,且铝合金比钛合金更容易受热软化效应的影响。In order to explore the drilling mechanism of different materials,The drilling process of titanium alloy Ti6Al4V and aluminum alloy Al7075-T651 was compared.Through the simulation for the drilling process by the finite element method(FEM)software-ABAQUS,the differences between Ti6Al4V and Al7075-T651 were analyzed in those aspects stress and strain,drilling force,friction force and energy of the workpiece with and without thermal coupling.The simulation result have shown that:In the non-thermodynamic coupled model,Al7075-T651 drill outlet chip is cap form,while Ti6Al4V chip is C-shaped.In the coupled thermodynamic model,the maximum stress of titanium alloy and aluminum alloy are first located at the bit transverse edge extrusion of the bit in the early stage,and with the depth of the tool,the maximum stress of the workpiece is focus on the main cutting edge.Compared with the model with and without thermal coupling,it was found that the drilling force is most significantly affected by temperature,followed by friction,and finally by plastic energy.Moreover,aluminum alloy is more susceptible to thermal softening effect than titanium alloy.

关 键 词：钻削力 摩擦力 塑性能 切屑 热力耦合 

分 类 号：TH166[机械工程—机械制造及自动化] TG52[金属学及工艺—金属切削加工及机床]