锻压技术

变截面细长轴矫直辊型数学建模及仿真

英文标题：Mathematics modeling and simulation analysis of roll shape on non-uniform slender axle straightening

作者：李边境尚金龙张春生王英杰

单位：燕山大学

分类号：

出版年,卷(期):页码：2014,39(4):143-148

摘要：

变截面细长轴类件成形加工过程中特别容易由于刚度差异或应力集中等问题而产生截面椭圆变形和轴线弯曲变形等缺陷，故需要对其进一步地矫直加工。基于弹塑性弯曲变形理论，推导出考虑材料加工硬化时圆形被矫直件在矫直过程中的弯矩、能耗与弯曲变形的关系式。然后利用MATLAB遗传算法工具箱对矫直辊的主要参数进行了搜索优化，并根据得出的参数对其进行数学建模。利用大型有限元分析软件MARC对整个过程进行模拟仿真，最终通过对比分析后处理中被矫轧件在三种矫直速度时的内部残余应力分布情况、圆度和直线度，从而找出矫直速度对矫直精度的影响规律。

Non-uniform slender axle must be straightened before being used because it usually gets ellipse, bending and other defects in the process of fabrication because of the stiffness difference, stress concentration and some other reasons. According to the elastic-plastic bending theory, the relationship was deduced between bending deflection and bending moment, energy consumption when the work-hardening effect is under consideration. The mathematics modeling was performed after optimizing the related straightening parameters with the help of the MATLAB genetic algorithm toolbox. Based on the finite element analysis software MARC, some simulation analyses were conducted. In the end, the distribution of inner residual stress, roundness and straightness of straightening parts under three straightening speeds in postprocessing were contrastive analyzed，and then the rule of influence of straightening speed on straightening accuracy was found out.

基金项目：

秦皇岛市科学技术研究与发展计划项目（2012021A002）

李边境（1968-），女，本科，讲师

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