摩擦因数及坯料壁厚对筒体件辊挤成形质量的影响  

Influence of friction coefficient and blank wall thickness on roll extrusion quality of cylindrical parts

作　　者：高帅 张宝红[1] 霍文娟 张治民[1] 高畅 Gao Shuai;Zhang Baohong;Huo Wenjuan;Zhang Zhimin;Gao Chang(School of Material Science and Engineering,North University of China,Taiyuan 030051,China;Jinxi Industries Group Co.,Ltd.,Taiyuan 030027,China)

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]晋西工业集团有限责任公司,山西太原030027

出　　处：《锻压技术》2021年第10期150-155,共6页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51775519)。

摘　　要：运用Deform-3D软件对辊挤成形进行数值模拟,分析了不同摩擦因数和坯料壁厚对半成品飞边高度的影响,并研究了成形过程中模具的受力情况。研究结果表明:飞边高度随着摩擦因数和坯料壁厚的增加而增大;径向载荷同样随摩擦因数的增加而增大,但随坯料壁厚的增加而减小。当摩擦因数为0.4、坯料壁厚为17.0 mm时,冲头径向载荷最大,达到868 kN。最后进行成形试验,有限元模拟和成形试验得到的飞边高度偏差仅为10%,在消除飞边后筒体件表面无折叠缺陷,试验结果验证了模拟结果的可信性。The roll extrusion process was numerically simulated by software Deform-3 D,and the influences of different friction coefficients and blank wall thicknesses on the flash height of semi-finished product were analyzed to study the force conditions of mold during the forming process.The research results show that the flash height increases with the increasing of the friction coefficient and the blank wall thickness,and the radial load also increases with the increasing of the friction coefficient,but decreases with the increasing of the blank wall thickness.When the friction coefficient is 0.4 and the blank wall thickness is 17.0 mm,the maximum radial load of punch is 868 kN.Finally,the forming test was carried out,and the deviation of the flash height obtained by the finite element simulation and the forming test was only 10%.In addition,after the flash was eliminated,there was no folding defect on the surface of cylinder part.Thus,the test results verifies the credibility of the simulation results.

关 键 词：曲线回转外形 辊挤成形 摩擦因数 坯料壁厚 飞边高度 

分 类 号：TG312[金属学及工艺—金属压力加工]