对摩托车车架焊接变形的研究

A Study on the Welding Deformation of Motorcycle Frame

摩托车车架大多采用复杂管和板式焊接结构,车架焊接后往往会出现焊接变形、内部产生焊接应力等,不但直接影响整车装配及整车性能,还会降低车架结构的承载能力,降低焊接接头和车架的疲劳强度而引发事故。如何保证摩托车车架的结构尺寸、形状精度及强度是车架生产中最大的问题,尤其是在大排量摩托车开发设计中尤为重要。只有对焊接进行全过程控制,采取有效的设计和工艺措施控制焊接变形,并对超出公差要求的焊接变形进行矫正,才能达到和保证车架尺寸精度和装配要求。

Most of the frames of motorcycles are of complex pipe and plate-type welding structure. Welding deformation and welding stress inside the frame may occur after the frame welded, which not only affects the motorcycle assembly and motorcycle performance, but also lowers the load-supporting capacity of the frame structure and the fatigue strength of the weld joints and the frame, thus causing accidents. How to ensure the structural dimensions, shape accuracy and the strength is the most important problem in frame production, especially in the design of large-displacement motorcycles. Only the welding is controlled in the process, the welding deformation is controlled by taking effective measures in the design and the technological process and the overproof welding deformation is controlled, can the frame dimension accuracy and assembly demands be met.