矩形截面小圆角管件胀-压复合成形工艺  

Bulging-pressing composite forming process for small fillet tube with rectangular section

作　　者：刘志强 金守一[3] 祝世强 刘钢 Liu Zhiqiang;Jin Shouyi;Zhu Shiqiang;Liu Gang(National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;Institute of High Pressure Fluid Forming,Harbin Institute of Technology,Harbin 150001,China;General R&D Institute,China FAW Group Co.,Ld.,Changchun 130000,China;Capital Aerospace Machinery Company,Beiing 100076,China)

机构地区：[1]哈尔滨工业大学金属精密热加工国家级重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工业大学流体高压成形技术研究所,黑龙江哈尔滨150001 [3]中国第一汽车集团有限公司研发总院,吉林长春130000 [4]首都航天机械有限公司,北京100076

出　　处：《锻压技术》2021年第4期44-49,共6页Forging & Stamping Technology

基　　金：国家高层次人才特殊支持计划项目(W020239)。

摘　　要：对于精度要求高、圆角半径小、厚度分布均匀的矩形截面管件,传统的成形工艺难以成形出合格零件。采用有限元模拟和实验研究的方法,研究了矩形截面小圆角管件胀-压复合成形工艺,分析了内压、上模压下量等关键参数对零件圆角半径和壁厚分布的影响。结果表明,增大内压和上模压下量有利于圆角的填充,采用适当的内压和上模压下量,矩形试件的相对圆角半径可以达到0.86。与常规的内高压成形中圆角及附近减薄严重不同,胀-压复合成形工艺的圆角及附近区域具有增厚的现象,有利于获得壁厚更加均匀的小圆角零件。在对成形规律进行研究的基础上,建立了矩形截面小圆角管件的成形工艺窗口,成形出了满足形状与尺寸要求的管件。For the rectangular section tube with high precision,small fillet radius and uniform thickness distribution,the traditional forming process is difficult to form the qualified parts.Therefore,the bulging-pressing composite forming process of tube with rectangular section and small fillet was studied by finite element simulation and experiment methods,and the influences of key parameters such as internal pressure and downward displacement of upper die on the fillet radius and wall thickness distribution of part were analyzed.The results show that increasing internal pressure and downward displacement of upper die are beneficial to the filling of fillet,and the relative fillet radius of rectangular component reaches 0.86 by appropriate internal pressure and downward displacement of upper die.Furthermore,different from the serious thinning of fillets and nearby areas in the traditional hydroforming,the fillets and nearby areas are thickened by the bulging-pressing composite forming process,which is beneficial to obtain the small fillet part with more uniform wall thickness.Thus,on the basis of the study of forming law,the forming process window of tube with rectangular section and small fillet is established,and the tube meeting the requirements of shape and size is formed.

关 键 词：胀-压复合成形 小圆角成形 矩形截面管件 壁厚分布 工艺窗口 

分 类 号：TG394.2[金属学及工艺—金属压力加工]