基于多目标优化的硬质合金刀具前刀面粘结破损试验研究

Research on Bond Breakage of Rake Face of Carbide Tools Based on Multi-Objective Optimization

为了提高硬质合金刀具在切削加工2. 25Cr1Mo0. 25V材料时的使用寿命,有效减少切削过程中刀具的粘结破损,提出了以粘结破损深度、面积最小为优化目标,以切削速度、进给量、切削深度为优化变量的多目标优化设计方法。设计单因素试验,对不同切削参数下的刀具粘结破损形貌进行分析。在单因素的试验基础上建立三因素四水平正交试验,运用熵值法将多个试验结果进行综合处理。建立刀具粘结破损量的二阶响应面模型,得到切削参数与刀具粘结破损之间的变化规律,并通过对切削参数的范围划分,明确硬质合金刀具的切削参数优选区域。

In order to improve the cemented carbide tool life when cutting 2.25CrlMoO.25V material,and effectively reduce the bond breakage of the tool during the cutting process,a multi-objective optimization design method with the sticking failure depth and the minimum area as the optimization target and the cutting speed,feed rate and cutting depth amount as the optimization variables is proposed.Based on the single factor experiment,a three-factor four-level orthogonal experiment is established,and multiple experimental results are processed comprehensively by entropy method.The second-order response surface model of tool sticking failure is established,and the variation law between cutting parameters and tool sticking failure is obtained.By dividing the range of cutting parameters,the optimum region of the cutting parameters for the cemented carbide tool is defined.