基于ABAQUS的二维正交高速切削热—力耦合分析  

Thermal Coupling Analysis of Two-dimensional Orthogonal High-speed Cutting Based on ABAQUS

作　　者：郭奇亮 鲁家旭 王鹏云[1] 吴艺明 时建纬 Guo Qiliang;Lu Jiaxu;Wang Pengyun;Wu Yiming;Shi Jianwei(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;不详)

机构地区：[1]郑州大学机械与动力工程学院

出　　处：《工具技术》2024年第6期97-103,共7页Tool Engineering

摘　　要：采用ABAQUS非线性有限元分析软件,建立2024铝合金材料正交切削有限元模型,结合Johnson-Cook材料本构关系和剪切失效准则仿真模拟切屑的形成,对切削速度(240~360m/min)、切割角度(-6°~6°)与切削力、切削温度、Von-Mises屈服应力以及应力分布的关系进行仿真分析。结果表明:Von-Mises屈服应力取决于材料本身的性质,与切削速度和切割角度无关;切削速度从240m/min提高至360m/min时,对切削力几乎没有影响,切削的最高温度逐渐增大,工件材料接近切削区的表面温度逐渐降低,第Ⅱ变形区的切屑应力逐渐减小,第Ⅰ变形区的范围呈减小趋势;切割角度在-6°~6°内每减小6°时,切削力与切削的最高温度分别约增高7.305%和21%,已加工表面的残余应力层的深度逐渐增大,切屑的温度与应力分布沿剪切面逐渐呈条带状分布。In this paper,the nonlinear finite element analysis software ABAQUS is used to establish an orthogonal cutting finite element model for the material 2024 aluminum alloy,combine with the Johnson-Cook material constitutive relationship and shear failure criterion simulation to simulate the formation of chips,and the relationship between cutting speed(240~360m/min),cutting angle(-6°~6°)and cutting force,cutting temperature,Von-Mises yield stress and stress distribution are simulated and analyzed.The results show that the size of the Von-Mises yield stress depends on the nature of the material itself and has nothing to do with the cutting speed and cutting angle.When the cutting speed changes from 240m/min to 360m/min,it has almost no effect on the cutting force.The maximum cutting temperature will gradually increase,and the surface temperature of the workpiece material close to the cutting area will gradually decrease.The stress on the chips in the second deformation area gradually decreases,and the range of the first deformation area shows a decreasing trend.The cutting angle is from-6°to 6°.When the cutting angle decreases by 6°,the cutting force and the maximum cutting temperature increase by an average of about 7.305%and 21%,the depth of the residual stress layer on the processed surface gradually increases,and the temperature distribution and stress distribution on the chips are gradually distributed in strips along the shear surface.

关 键 词：二维正交切削 J-C模型 高速切削 热力耦合 

分 类 号：TG506.1[金属学及工艺—金属切削加工及机床] TH162.1[机械工程—机械制造及自动化]