同济大学学报（自然科学版）2024，Vol.52Issue(2)：276-283,8.DOI:10.11908/j.issn.0253-374x.22208
异径铝合金薄壁圆管的加热塑性连接方法与模具设计
Tool Design of Heating Plastic Connection for Unequal Diameter Aluminum Thin-Walled Tubes
摘要
Abstract
Aluminum thin-walled tube can be cracked during axial compression connection,which can result in connection failure.To improve the compressional plastic formability of aluminum alloy,a heating plastic connection tool for unequal diameter thin-walled tubes was designed in the paper.The thermal stress and heat transfer of the tool in the process of heating plastic connection were numerically simulated by finite element software.The cooling system structural parameters were analyzed by using the orthogonal test method.The tool and the trial unequal diameter aluminum joint were manufactured.The results show that the maximum stress of the tool at 20℃and 600℃are lower than the yielding strength of the material at the corresponding temperature,which meets the requirements of heating plastic connection process for steel and aluminum.The cooling system designed can effectively slow down the heat transfer from the tool to the tensile machine.The joint of φ 44 and φ30 is successfully connected by the tool at 300℃,which verifies the rationality of the tool design and the feasibility of the connection process,provideing guidance for subsequent engineering application.关键词
塑性连接/薄壁管/轴向失稳/模具设计Key words
plastic connection/thin-walled tube/axial instability/tool design分类
机械制造引用本文复制引用
吴航宇,余海燕..异径铝合金薄壁圆管的加热塑性连接方法与模具设计[J].同济大学学报（自然科学版）,2024,52(2):276-283,8.基金项目
上海市自然科学基金(19ZR1460100),国家重点研发计划项目(2022YFE0208000) （19ZR1460100）
