自行车接头对焊机焊接过程的进行采用凸轮机构控制,焊接过程由凸轮的外廓形状所决定。常用的凸轮工作部分径向尺寸是变化的。本文通过对自行车接头的分析和试验,提出设计工作部分等半径凸轮的方案。使得凸轮的设计、加工和维修都大大简化。该对焊机所焊接的自行车接头质量超过国内某些名牌自行车所用的接头。 Bicycle joint welding machine welding process using the cam mechanism control, the welding process is determined by the shape of the cam contour. Commonly used cam working part of the radial size is changing. In this paper, through the analysis and experiment of the bicycle joint, the scheme of designing the working part such as the radius cam is put forward. Making the cam design, processing and maintenance are greatly simplified. The welding quality of the welded bicycles than some domestic brands of bicycles used joints.