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  

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 Ma Biao;Guo Yuele;Li Hui(Department of Mining Engineering, Luliang College, Lyuliang 033000, Chin)

机构地区：[1]吕梁学院矿业工程系

出　　处：《锻压技术》2018年第5期36-40,共5页Forging & Stamping Technology

基　　金：吕梁学院科研基金项目(ZRQN201605)

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,largesmall-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.

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[金属学及工艺—金属压力加工]