关于铝合金薄板高速搅拌摩擦焊接搅拌头的新型设计  

New Design of Tool for High Speed Friction Stir Welding of Aluminum Alloy Sheet

作　　者：刘柏韬 顾彬[1] 余海东[1] LIU Botao;GU Bin;YU Haidong(Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structure Technology,Shanghai Jiao Tong Univ.,Shanghai 200240,China)

机构地区：[1]上海交通大学、上海市复杂薄板结构数字化制造重点实验室,上海200240

出　　处：《机械设计与研究》2023年第5期152-157,共6页Machine Design And Research

基　　金：国家自然科学基金资助项目(52275502)。

摘　　要：搅拌摩擦焊是新能源汽车电芯制造中代替传统激光焊接的关键方法。高速搅拌摩擦焊是提升电芯生产效率的关键工艺,科学的搅拌头尺寸参数设计方法可以有效减少高焊速条件下飞边沟槽缺陷,并提升电芯生产的合格率。基于对高焊速搅拌摩擦焊搅拌头的设计的理解,设计包括轴肩半径、轴肩摩擦系数、轴肩内凹角、轴针上半径、轴针下半径和轴针长度在内的高焊速搅拌头尺寸参数研究系统。针对铝合金薄板工业生产中质量需求,设计焊后焊缝质量评价指标。在考虑焊缝飞边大小、沟槽深浅以及左右材料交互比例的基础上,分析不同搅拌头参数影响下的焊接质量变化,获得搅拌头尺寸参数变化对焊接质量的影响规律,获得高焊速条件下的铝合金薄板搅拌摩擦焊搅拌头的最优设计。Friction stir welding,replacing traditional laser welding,is playing a key role in the production of new energy vehicle battery cells.High-speed friction stir welding is a crucial process for improving the production efficiency of battery cells.A scientifically designed parameter system for the size of the welding tool can effectively reduce defects such as flying edges and grooves under high welding speeds as well as improving the yield rate during battery cell production.Based on the comprehension of the high-speed friction stir welding tools design,this article proposes a system to analyze the size parameters of the welding tool,including the shoulder radius,the shoulder friction coefficient,the shoulder concave angle,the upper and lower pin radius and the pin length.In response to quality requirements in industrial production of aluminum alloy thin plates,quality evaluation indicators for post-welding seams are designed.Considering the size of the flying edges,the depth of the grooves and the proportion between the left and right materials,the changes in welding quality under the influence of different welding tool parameters are analyzed to obtain the rules in which welding size parameters influence the welding quality,and to obtain the optimal design of the friction stir welding tool on aluminum alloy thin plates under high welding speed.

关 键 词：高速搅拌摩擦焊 搅拌头设计 尺寸参数 焊接质量评价 焊接参数 

分 类 号：TG453.9[金属学及工艺—焊接]