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在修理拖拉机过程中,一项很重要的工作就是活塞连杆的组装,这道工序技术要求比较高。常温下,活塞销和销孔之间有0.01～0.02毫米的紧度,活塞销又不能敲打,因此,组装时对活塞进行加热,使活塞销孔胀大,以便组装。一般的加热方法是用机油煮,也有用水煮的,还有人放在火上烤,这些方法最大的缺点是温度不易掌握。下面介绍一种我们在修理4125发动机时所采用的电加热方法: 用截面积为1平方毫米左右的漆包线绕成如图所示的线圈,线圈
In the process of repairing tractors, a very important job is the assembly of the piston rod, this process requires relatively high technology. At room temperature, the piston pin and pin hole between 0.01 ~ 0.02 mm tightness, the piston pin can not be beat, so the assembly of the piston heating, the piston pin hole swell for assembly. The general method of heating is cooking oil, but also useful boiled, there are people on the fire roasted, the biggest drawback of these methods is the temperature is not easy to grasp. The following describes one of the electrical heating methods we used to repair the 4125 engine: Winding coils, coils, as shown, with enamelled wires with a cross-section of about 1 mm2