大型复杂多腔挤压件校形工艺数值模拟与实验研究  

Numerical simulation and experimental study on correction process for large complex multi-cavity extruded parts

作　　者：王清峰 孙磊 初冠南[1] Wang Qingfeng;Sun Lei;Chu Guannan(School of Materials Science and Engineering,Harbin Institute of Technology(Weihai),Weihai 264209,China)

机构地区：[1]哈尔滨工业大学(威海)材料科学与工程学院,山东威海264209

出　　处：《锻压技术》2023年第5期282-286,共5页Forging & Stamping Technology

基　　金：山东省重大科技创新工程(2020CXGC010303);山东省重大科技创新工程(2019TSLH0103);国家自然科学基金重点项目(U1937205)。

摘　　要：提出了一种新的充液轴向镦压校形工艺,以降低大型复杂多腔型材在热挤压生产过程中产生的变形,该工艺的核心是在内压的支撑下通过轴向压缩变形来提高零件截面的形状精度。通过有限元模拟和实验研究,验证了该工艺在6005-T6铝合金复杂多腔挤压件上的可行性。结果表明:在内压的支撑下,经过压缩变形,型材的宽度增大。充液轴向镦压校形工艺获得的型材关键尺寸与目标值基本一致,而且截面形状与设计轮廓基本贴合,且机加工后满足后续工装需求。充液轴向镦压校形工艺在减小复杂多腔热挤压型材变形、提高形状精度方面是可行的。A new axial hydroforming extrusion correction process was proposed to reduce the deformation of large complex multi-cavity profiles during hot extrusion production process,and the core of the process was to improve the shape accuracy of part section through axial compression deformation supported by internal pressure.Then,the feasibility of the process on 6005-T6 aluminum alloy complex multi-cavity extruded parts was verified by finite element simulations and experimental studies.The results show that the width of the profile increases after compression deformation under the support of internal pressure.The key dimensions of the profiles obtained by the axial hydroforming extrusion correction process are basically consistent with the target values,and the sectional shape basically fits the designed contour,which meets the requirements of subsequent tooling after machining.Thus,the axial hydroforming extrusion correction process is feasible in reducing the deformation of complex multi-cavity hot extruded profiles and improving the shape accuracy.

关 键 词：热挤压件 多腔型材 镦压校形 镦形量 形状精度 

分 类 号：TG394[金属学及工艺—金属压力加工]