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多年来,锻锤活塞环一直采用铸铁或碳钢制成。为使活塞环具有一定的弹力,必须经适当的热处理,其几何精度和表面粗糙度的要求机械加工也难以达到.由于制造上难度较高,所以废品率也较高。金属活塞环最大的缺点是使用中对缸壁的磨损较快,一般中修须镗缸.大修时要换缸套。尤为严重的是,若汽缸润滑不良、缸壁有杂物、或打偏锤及立柱位置调整不当,使活塞有挤压汽缸内壁现象,很容易划伤缸壁,甚至拉出很明显的严重沟痕,最深可达1—1.5毫米,宽度可达2—3毫米或更大的面积,在圆周方向上以不均匀状态分布,造成漏气。如不及时修理,将严重
Forging hammer piston rings have been made of cast iron or carbon steel for many years. In order for the piston ring to have a certain degree of elasticity, it must be properly heat-treated, and its geometrical accuracy and surface roughness are difficult to achieve by mechanical processing, and the rejection rate is also high due to its high manufacturing difficulty. The biggest disadvantage of the metal piston ring is the use of the cylinder wall wear faster, the general repair bore cylinder. Overhaul to change cylinder liner. Particularly serious is that if the cylinder lubrication is poor, there are debris cylinder wall, or hammer and column position improper adjustment, the piston squeeze cylinder wall phenomenon, it is easy to scratch the cylinder wall, and even pulled out the obvious serious groove Scars, up to 1-1.5 mm deep, up to 2-3 mm wide or larger, are unevenly distributed in the circumferential direction, resulting in air leaks. If not repaired, will be serious