車門用異種鍍鋅鋼板激光焊接新工藝與接頭性能研究

打開文本圖片集

中圖分類號(hào)：U466；TG456.7 文獻(xiàn)標(biāo)志碼：B DOI：10.19710/J.cnki.1003-8817.20240401

Research on NewLaser WeldingProcessand JointProperties ofDissimilar Galvanized Steel Sheets for Car Doors

Zhou Mu， Zhou Chuanchuan， Li Jinbao， Jiang Yifan， Liu Baofeng， He Tengxiang （Engineering Technology Department，China FAW Co.，Ltd.， Changchun 130000）

Abstract：For the car door dissimilar galvanized steel，this paper explores in theconditions without the use of prefabricated protruding point，byadjusting the laser welding power，welding speed，welding pendulum amplitude，to developasinusoidal pendulum basednew laserwelding process，toachieve first-stage weldingof the disimilar galvanized steel shet.Meanwhile，the paper alsoexplores theruleof influenceof different process parameters on weld morphologyand mechanical propertiesof welded joints intheprocessofoscilating laser welding，toprovide theoretical basis and technical support for the development and application of new automotive laser welding process and cost optimization of production line scheme planning.

Keywords：Laserwelding，Dissimilargalvanized steel，Oscilating welding，Welded joint，Mechanical properties

1前言

激光焊接工藝具有能量密度高、焊接速度快、焊接應(yīng)力變形小、柔性好等優(yōu)勢(shì)1，因而廣泛應(yīng)用于乘用車白車身的焊接[2-3]

在傳統(tǒng)的鍍鋅鋼制車門激光焊接時(shí)，鍍鋅鋼板焊接受熱迅速汽化產(chǎn)生鋅蒸氣，僅通過一次激光焊接無法使鋅蒸氣完全逸出，這將導(dǎo)致焊縫處出現(xiàn)縮孔等缺陷[4-5]。（剩余5729字）