基于等效平面法的切削仿真方法研究及优化  

Improvement of Simulation Method for Oblique Cutting Based on Equivalent Plane Method

作　　者：陈树梁 徐雷[1] 任清川[1] 牟宗亮 CHEN Shuliang;XU Lei;REN Qingchuan;MOU Zongliang(College of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学机械工程学院,成都610065

出　　处：《组合机床与自动化加工技术》2023年第9期137-140,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：四川省重点研发计划项目(2021YFG0060)。

摘　　要：基于等效平面的方法使用二维正交切削仿真的结果来代替三维斜角切削仿真的应力场和温度场,以便节省模拟时间和成本。针对等效平面法存在一定的误差的问题,在分析误差产生原因的基础上,在温度场方面对等效平面法进行优化,并将其应用到铣削仿真中。首先,建立了等效平面刀具参数与主截面刀具参数之间的转换模型;同时,也对工件的重要参数,如切削厚度、基体厚度、比热和摩擦系数进行了等效处理;最后,通过建立仿真模型进行对比分析,发现基于优化的等效平面法建立的二维切削模型有效地减小了二维模型与三维模型的仿真结果之间的误差,其中,刀具与工件接触区域的最大温度误差从9.63%降低到了0.29%,工件基体的温度分布也得到了显著改善。因此,优化的等效平面法可以有效地减小仿真误差。Based on the equivalent plane method,some scholars use the results of two-dimensional orthogonal cutting simulation to replace the stress field and temperature field of three-dimensional oblique cutting simulation,in order to save the simulation time and cost.However,However,at present,the application of the equivalent plane method is not perfect,and there are certain errors.In this paper,Based on the analysis of the causes of error,this paper optimizes the equivalent plane method in the temperature field and applies it to the milling simulation.Firstly,the conversion model between the tool parameters in the equivalent plane and those in the main section is established.At the same time,the important parameters of the workpiece are also treated equivalently,such as cutting thickness,matrix thickness,specific heat and friction coefficient.Finally,by establishing simulation models for comparative analysis,it is found that the two-dimensional cutting model established based on the improved equivalent plane method effectively reduces the error between the simulation results of the two-dimensional model and the three-dimensional model,in which the maximum temperature error of the contact area of tool and workpiece is reduced from 9.63%to 0.29%,and the temperature distribution of the workpiece substrate is also significantly improved.So the improved equivalent plane method can effectively reduce the simulation error.

关 键 词：斜角切削 等效平面法 刀具等效参数 等效基体厚度 等效比热 

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