全文总字数：10234字

基于刀具几何参数对切削过程影响仿真的车刀优化设计

摘 要

采用有限元法来模拟切削加工过程不但克服了传统的实验方法的费时、费用昂贵的缺点，还可以从模拟结果中得出许多实验难以得到的材料力学特性和物理特性，如：加工工件表面和切屑的温度场分布、应力分布、应变分布和残余应力分布等。 本课题是通过有限元方法获得具有不同几何参数（前角、后角、刃圆半径）刀具对切削过程中的切削力、温度场的影响规律，进而对车刀进行优化设计。要求有限元仿真计算所获得的切削力、温度场和切屑形态结果准确，所设计的车刀结构经济合理。要求分析论证设计方案、性能结构参数；并进行工艺性分析、标准化分析及可行性、经济性分析。

关键词：刀具，几何参数，有限元，切削

turning tool optimization design based on the simulation of the influence of tool geometry parameters on the cutting process

ABSTRACT

Finite element method to simulate the machining process of the method not only overcomes the traditional time-consuming and expensive shortcomings, many experiments can also be concluded from the simulation result is difficult to get the material mechanical properties and physical properties, such as: machining surface and the chip temperature field distribution, stress distribution and strain distribution and residual stress distribution, etc. This subject is to obtain the influence law of cutting force and temperature field of cutting tool with different geometric parameters (front Angle, back Angle, edge circle radius) by finite element method, and then to optimize the turning tool design. The results of cutting force, temperature field and chip shape obtained by finite element simulation are required to be accurate. Analysis and demonstration of design scheme and performance structure parameters; And process analysis, standardization analysis and feasibility, economic analysis.