电焊机2024，Vol.54Issue(8)：29-35,7.DOI:10.7512/j.issn.1001-2303.2024.08.04
基于X形正反螺纹搅拌针的搅拌摩擦搭接焊材料流动及其影响下的接头成形规律
Material Flow and Its Induced Joint Formation of FSLW Process by X-shaped Reverse-threaded Pin
摘要
Abstract
Making the pin largely plunge into the lower plate is a common process of friction stir lap welding(FSLW)tech-nology,but the induced hook with an up-bending morphology reduces the effective sheet thickness of the joint,which is not conducive to obtaining the joint with high bearing capacity.In this paper,in order to realize the down-bending morphology of hook,the X-shaped reverse-threaded pin was self-designed.By this pin,the material flow behavior was simulated numeri-cally during FSLW,and the relationship between material flow and joint formation was studied.The results showed that un-der the driving action of pin,the materials in stir zone(SZ)top and SZ bottom respectively flowed downwards and upwards and then accumulated in the middle of SZ,and these accumulated materials had a flowing trend along the horizontal direc-tion.When the material accumulated zone was located above the original lap interface,the hook bent downward and the SZ width was enlarged.At the rotating velocity of 800 rpm and the welding speed of 300 mm/min,the 2024-T4 aluminum al-loys FSLW joint had a 299.6 MPa tensile strength,and this value was greatly higher than the reported tensile strengths of 2000 series aluminum alloys FSLW joint.关键词
搅拌摩擦搭接焊/X形正反螺纹搅拌针/数值模拟/材料流动/接头成形Key words
friction stir lap welding/X-shaped reverse-threaded pin/numerical simulation/material flow/formation分类
矿业与冶金引用本文复制引用
余占兴,陈政硕,姬新淇,金晨,宋崎..基于X形正反螺纹搅拌针的搅拌摩擦搭接焊材料流动及其影响下的接头成形规律[J].电焊机,2024,54(8):29-35,7.基金项目
国家自然科学基金(52074184) （52074184）
