DEFORM难加工材料切削性能仿真研究切削要素比较

摘要DEFORM-3D是应用有限元方法(FEM)分析三维复杂加工过程的模拟工具,它不仅鲁棒性好,而且易于使用。借助于该模拟分析环境,能够对切削过程中刀具几何参数、切削条件以及加工过程中的其他因素产生的影响进行研究。应用DEFORM自带的切削仿真模型,模拟高速车削加工中工件及刀具的温度分布、切屑流动、应力、应变和切削力等。模拟结果对减少产品试验、降低开发成本、缩短开发新产品及新工艺的时间等方面都具有重大意义。DEFORM-3D对于研究刀具几何模型、切屑形成以及切削参数控制的刀具制造者和使用者来说,是一个较理想的工具。本文通过DEFORM-3D软件经行有限元建模分析。改变切削加工过程中的刀具的切削参数：切削速度，背吃刀量，进给量。对切削过程中的刀具受力，以及刀具的切削温度进行分析比较。察看不同的切削要素，对切削的刀具受力，以及温度大小的影响幅度，对其经行一个系统的比较。通过模拟仿真，得出：切削过程中，背吃刀量对刀具受力影响最大，背吃刀量增加1倍，切削力增加1.5倍。而切削速度对刀具切削温度影响最大。课题研究为实际生产过程中的切削参数的选择提供一个很好的理论依据。49751

关键词：车削三要素;有限元;DEFORM软件;仿真

Abstract DEFORM-3D is a powerful robust simulation tool that uses the Finite Element Method (FEM) to analyze the three-dimensional complex machining processes. It provides a virtual testing environment in which engineers can study the influence of tool geometry, cutting conditions, and other factors on machining process performance. The high-speed turning process modeled uses DEFORM. With the help of the simulation tool, turning cutting forces prediction and the temperature distribution in the work piece and cutting tool chip flow, stress and force or power requirements are simulated. The result of the simulation is crucial meaning to reducing the need for production trials, lower development costs and shorter lead times for new products and processes. DEFORM-3D is an ideal tool for both cutting tool manufacturers and users who wish to study the effects of insert geometry and cutting parameters on chip formation and control. On the condition of DERORM-3D software for the finite modeling and analysis, this paper changes the parameters of the cutting tool , which is cutting speed ,the back of cut and feed rate, during the cutting process to study the force of the cutting and the cutting temperature. We could compare the results of the simulation with different cutting force and temperature .we get the result like that: the back of the cutting have the greatest impact on the cutting force, while the back of the cutting accelerate 1 times, the cutting force increased by 1.5 times. While the cutting speed have the greatest impact on the cutting temperature.The research provides a good theoretical basis for the actual production of the cutting.

Key words:three elements of turning;FEM;DEFORM; simulation

第一章绪论.3

1.1难加工切削材料性能参数的确定...3

1.2 金属切削的特点.3

第二章有限元理论的学习...7

2.1 有限元法的简介.7

2.2 有限元法的原理及运用步骤...7

2.3 常用的有限元软件的分析比较.8

第三章基于DEFORM-3D的切削加概述.10

3.1 DEFORM-3D-V6.1的简介..10

3.2 DEFORM-3D-V6.1仿真的顺序..12

第四章模拟过程及后处理.13

4.1 GH4169的概述.13

4.2刀具结构材料及工艺参数的选择...14

4.3 材料模型设置 ..15

4.4仿真参数的选择.19

4.5 运用DEFORM-3D对切削过程模拟仿真 ..19 4.6 模拟过程 ..25

4.7 DEFORM-3D后处理过程 ...25

第五章仿真结果及分析 ...30 DEFORM难加工材料切削性能仿真研究切削要素比较:http://www.751com.cn/jixie/lunwen_52846.html