锻锤活塞与锤杆过盈联接配合的孔、轴结合面原设计是圆锥面。在加工时由于相配合的孔、轴锥度公差控制难度大,往往因圆锥配合面接触不好,在结合面上产生的结合压力降低。因此,有时在运行中发生活塞和锤杆脱离。这样,极大地影响生产。有时造成该部件报废,价值几千元以上,造成严重损失。为此 Forged hammer piston and hammer interference fit with the hole, the original design of the shaft joint surface is a conical surface. Due to the matching of the holes during machining, it is difficult to control the taper tolerance of the shaft, which is often caused by the poor contact of the conical mating surfaces and the reduction of the combined pressure on the mating surfaces. As a result, the piston and hammer rod sometimes break off during operation. In this way, production is greatly affected. Sometimes caused by the scrap parts, the value of a few thousand dollars, resulting in serious losses. to this end