我厂锻工车间有一台560公斤空气锤,由于连接曲轴和连杆的螺丝折断,将活塞尾部碰坏(如图1所示),因为没有备件,如更换新的,则要两、三个月,这样影响生产任务的完成。后来我们采用以下修复方法,顺利地解决了这个问头。首先将断裂的部分车掉,挑出2级细牙螺纹;再根据活塞尺寸大小配一青铜套,挑出2级细牙内螺纹,但要小于活塞的螺纹0.1～0.2毫米。将其加热到200℃左右和活塞丝扣进行热装配。然后将所配青铜套的外径车成原来 I plant a forging shop has a 560 kg air hammer, due to the connection of the crankshaft and connecting rod break the screw, the piston will damage the tail (as shown in Figure 1), because there is no spare parts, such as the replacement of new, then two or three Month, thus affecting the completion of production tasks. Later, we used the following repair method, successfully solve the problem. First of all, the broken part of the car off, pick out 2 fine thread; then according to the size of the piston with a bronze sleeve, pick out fine thread 2, but less than the piston thread 0.1 to 0.2 mm. Heat it to around 200 ° C and assemble the piston with threaded fasteners. Then the outer diameter of the car with bronze into the original car