基于ABAQUS有限元仿真的硬质合金刀具磨损机制研究

Research on Wear Mechanism of Cemented Carbide Tool Based on ABAQUS Finite Element Simulation

钛合金在切削过程中会产生严重的加工硬化现象,导致切削性下降、刀具磨损加剧,直接影响工件的加工质量。为研究钛合金切削性能和刀具磨损机制,利用ABAQUS软件建立了钛合金的有限元模型,对其切削过程进行仿真分析,研究硬质合金刀具磨损机制;设计Ti6Al4V钛合金车削实验,研究不同加工参数对刀具磨损程度的影响规律。研究结果表明:在切削钛合金时,刀具的磨损主要发生在刀尖和后刀面位置,刀具的磨损长度随车削速度的增加而变大,随车削深度的增加而减小,随进给量的增加呈现出先减小后变大的情况,实验和仿真结果趋于一致,平均误差在6%以内。

During the cutting process of titanium alloy,serious work hardening phenomenon will occur,which leads to the de⁃crease of machinability and the aggravation of tool wear,and directly affects the machining quality of the workpiece.In order to study the cutting performance of titanium alloy and tool wear mechanism,the finite element model of titanium alloy was established by using ABAQUS software,the cutting process was simulated and analyzed,and the wear mechanism of the cemented carbide tool was studied.The Ti6Al4V titanium alloy turning experiment was designed to study the influence of different machining parameters on the wear degree of the tool.The results show that when cutting titanium alloy,the tool wear mainly occurs at the tip and back face.The tool wear length increases with the increase of turning speed,decreases with the increase of turning depth,and decreases first and then increases with the increase of feed.The experimental and simulation results are consistent,with an average error of less than 6%.