机车车辆部在不锈钢铁道车辆生产线上安装了新型自动化电阻点焊机。每辆车有 50 0 0多个焊点 ,从而将墙板与侧面构架连接在一起。传统的焊机在独立控制的移动轴线上设有风缸驱动的电极。新型焊机的特点是采用 AC伺服电机和滚珠丝杆协同控制电极。该系统实现了电极的行程和力度得到精确控制的高速运动。每个焊点的平均焊接时间缩短至 3.5s,与传统的焊机相比 ,工作时间缩短了一半。而且 ,焊点质量有所提高 ,工作场地的噪音也有所降低 Locomotive and Rolling Stock Department in the stainless steel railway vehicle production line installed a new type of automatic resistance spot welding machine. Each vehicle has more than 50 0 joints, connecting the wall panels to the side frame. Conventional welders have cylinder-driven electrodes on independently controlled axes of movement. The new welding machine features AC servo motor and ball screw cooperating control electrode. This system realizes precise control of the stroke and force of the electrode at high speed. The average welding time per weld point is shortened to 3.5s, reducing working time by half compared to conventional welders. Moreover, solder joint quality has improved, the workplace noise has also been reduced