锻压技术

基于有限元连杆衬套温挤压损伤仿真分析

英文标题：Simulation analysis on damage of connecting rod bushing in warm extrusion based on finite element

作者：樊文欣曹存存杨华龙叶文波

单位：中北大学

关键词：连杆衬套温挤压损伤值旋压

分类号：TG376

出版年,卷(期):页码：2016,41(8):143-147

摘要：

在连杆衬套强力旋压生产工艺中，需“温挤制坯”对坯料进行先期处理，温挤后材料的损伤直接影响旋压的效果。应用Deform软件对衬套坯料的温挤压进行有限元模拟，随机选取5个节点，得到节点的损伤值随摩擦系数、挤压速度和坯料预热温度的变化规律，并由此得到温挤压后坯料的损伤随参数的变化为：坯料材料的损伤值随摩擦系数的增大而增大，随挤压速度的增大而增大，随坯料预热温度的增大反而减小。设计正交模拟试验，对试验结果进行方差分析得到摩擦系数对坯料损伤的影响最为显著，且当摩擦系数为0.1，挤压速度为1 mm·s-1，预热温度为650 ℃时，温挤压后坯料的最大损伤值最优，即坯料的损伤最小。

In the production of power spinning of the connecting rod bushing, it is necessary to preprocess the billet by warm extrusion, but the damage of the material directly affects the spinning effect. The warm extrusion of the connecting rod bushing was simulated by Deform, and five nodes were selected randomly. Furthermore, the influences of friction coefficient, extrusion speed and preheating temperature of billet on the damage values of the selected nodes were obtained, and the change of the damage parameters after warm extrusion was conducted that the billet damage increases with the increase of the friction coefficient, increases with the increase of extrusion speed, while decreases with the rising of preheating temperature of billet. Furthermore, the orthogonal simulation test was established, and it is shown that the influence of the friction coefficient on the billet damage is the most significant after the variance analysis on the test results. When the friction coefficient is 0.1, the extrusion speed is 1 mm·s-1, and the preheating temperature is 650 ℃, and the maximum damage value of the billet is optimal, that is, the damage is the minimum.

基金项目：

山西省自然科学基金资助项目(2012011023-2)

樊文欣（1964-），男，博士，教授

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