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发动机曲轴运行中的损伤,主要有弯曲、扭转和表面磨损。目前,对曲轴弯曲的校正一般采用冷压校正和表面敲击法。现简述如下: 一、冷压校正法将弯曲的曲轴反方向压过来,其作用力的大小应使所产生的残余变形,在压力负荷除去之后能消除曲轴的弯曲度。根据多年的实践摸索,由于曲轴的“松弛”和“后效”,校正时应使曲轴变形比所要校正的弯曲值大10～15倍。所谓“松弛”,即曲轴经冷压除去负载后,曲轴内应力状态的自动改变。所谓“后效”
Engine crankshaft damage during operation, mainly bending, torsion and surface wear. At present, the correction of crankshaft bending commonly used cold pressure correction and surface tapping method. Is summarized as follows: First, the cold pressure correction method will bend the crankshaft in the opposite direction pressed, the size of the force should make the residual deformation generated, the pressure load can be removed to eliminate the curvature of the crankshaft. Based on years of practice, due to crankshaft “relaxation” and “after effect”, the correction should make the crankshaft deformation is 10 to 15 times larger than the desired value of the correction. The so-called “slack”, that is, after the crankshaft is cold-pressed to remove the load, the crankshaft internal stress state automatically changes. The so-called “after effect”