论文部分内容阅读
在维修车辆时发现,车辆的发动机部分零部件出现不同程度的损坏,对此,根据我们的经验谈一谈以修复为主修理发动机的方法。1.气缸盖(1)气门过梁裂纹此裂纹一般是由于应力过大而造成。所以,当裂纹出现后,应力已基本消除,这就保证新的裂纹不会出现,可采用加热减应焊修法。焊前将缸盖预热到600℃左右,在400℃以上施焊,焊后在650～700℃保温缓冷,采用铸铁填充料。该方法适用于铸铁缸盖,对铝合金缸盖气门过梁裂纹也可以焊,但焊接工艺比较复杂。
When repairing a vehicle, it was found that some parts of the engine of the vehicle were damaged to some extent. According to our experience, we talked about how to repair the engine mainly. 1. Cylinder head (1) Gate Beam Crack This crack is usually caused by excessive stress. Therefore, when the crack appears, the stress has been basically eliminated, which will ensure that new cracks will not occur, you can use the heat reduction welding repair method. Before welding the cylinder head preheated to about 600 ℃, the welding at above 400 ℃, after welding at 650 ~ 700 ℃ insulation slow cooling, the use of cast iron filler. The method is suitable for cast iron cylinder head, aluminum alloy cylinder head valve over beam crack can also be welded, but the welding process is more complicated.