我厂B2152型龙门刨床,在加工零件运行中,由于压紧工件的螺钉松动,工件受力滑动,造成工作台齿条打坏八个齿(见图1)。齿条材质为灰口铸铁,为保证齿条公差要求和焊后工件变形小,我们采用冷焊法补焊。修复后,完全达到了设备技术要求。焊补效果良好。一、焊前准备 1。焊前,将齿条和齿条槽上的油污用汽油和纱布洗擦干净;然后用扁铲修整损坏的齿牙,破齿补焊部分与残存的连接处修成60°角,连接处根部修成圆弧形(见图2)。 2.焊条在使用前,经200℃烘干两小时。二、焊补方法 I plant B2152 gantry planer, machining parts in operation, the workpiece due to the compaction of the screw loose, the workpiece sliding force, resulting in work table gear broken eight teeth (see Figure 1). Rack material gray cast iron, to ensure that the rack tolerance requirements and deformation of the workpiece after welding small, we use cold welding repair welding. After the repair, fully meet the technical requirements of the equipment. Welding effect is good. First, welding preparation Before welding, the oil on the rack and rack grooves were cleaned with gasoline and gauze; then the damaged teeth were trimmed with a flat shovel, and the broken part and the remaining connections were made into a 60 ° angle. The root of the connection was repaired Arc-shaped (see Figure 2). 2 electrode before use, after drying at 200 ℃ for two hours. Second, welding methods