锻压技术

多模变薄拉伸工艺的变薄系数分配对工件质量和变形过程的影响

英文标题：Influence of thinning coefficient distribution on workpiece quality and deformation process in multimode thinning stretching process

作者：马骉郭越乐李辉

单位：(吕梁学院矿业工程系山西吕梁 033000)

关键词：多模变薄拉伸变薄系数分配方式有限元分析筒形件模具设计

分类号：TG356

出版年,卷(期):页码：2018,43(5):0-0

摘要：

为了分析多模变薄拉伸工艺的变薄系数分配对工件质量的影响，利用Simufact有限元仿真软件对多模变薄拉伸冷成形工艺进行数值模拟，采用C15-c低碳钢为实验材料，多模变薄拉伸的变薄系数分配分别采用小、中、大，大、小、大，与平均分配变薄系数的方式，以筒形件多模变薄拉伸成形件的等效塑性应变与等效应力为评价指标，分析不同变薄系数分配方式对工件成形质量的影响，并对仿真结果进行实验验证。经模拟分析和实验验证得出，变薄系数采用小、中、大的分配方式，变形力最小，为1350 kN，抗拉强度最高，为674 MPa，伸长率与其他两种分配方式相近；对多模变薄拉伸工艺的模具设计和工艺参数的确定有指导作用。

In order to analyze the influence of thinning coefficient distribution on workpiece quality in multimode thinning stretching process, finite element simulation software of Simufact was used to simulate multimode thinning and stretching cold forming process. Test material was C15c steel, and thinning coefficient distribution of multimode thinning and stretching adopts smallmediumlarge, largesmalllarge and average distribution respectively. The equivalent plastic strain and equivalent stress of multimode thinning and stretching forming for cylindrical part were used as evaluation indexes to analyze the influence of different thinning coefficient distribution modes on workpiece forming quality, and simulation results were tested and verified. The simulation analysis and experiment show that the deformation force of thinning coefficient smallmediumlarge is the smallest (1350 kN), and the tensile strength is the highest(674 MPa). The elongation rate is similar to those in the other two distribution methods, which is of guiding significance to determine the mold design and process parameters of multimode thinning stretching process.

基金项目：

吕梁学院科研基金项目(ZRQN201605)

作者简介：马骉（1989-），男，硕士研究生 Email：33707483@qq.com 通讯作者：李辉（1985-），男，硕士，讲师 Email:464956946@qq.com

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