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活塞—气缸摩擦副的寿命在很大程度上取决于摩擦表面的精加工方法。业已确定,铸铁零件的磨损机理因铸铁组织内存在游离石墨而有它自己的特点。这种机理与粘着现象结合在一起,造成各种金属组份的微粒从铸铁表面脱落,并因而出现擦伤。应用最广泛的提高铸铁零件耐磨性的方法是将工作表面的粗糙度降低到理想值。实现这一目标的主要困难是缺少能获得加工表面粗糙度Ra=0.2～0.3μm的经济而又有效的精机械加工方法。本文介绍一种铸铁活塞机械加工新工
The life of a piston-cylinder friction pair depends to a great extent on the finishing of the friction surface. It has been determined that the wear mechanism of cast iron parts has its own characteristics due to the presence of free graphite in the cast iron structure. This mechanism is combined with the sticking phenomenon, causing the particles of various metal components to fall off the surface of the cast iron and cause galling. The most widely used method to increase the wear resistance of cast iron parts is to reduce the roughness of the working surface to the desired value. The main difficulty in achieving this goal is the lack of an economical and effective finishing method that yields a machined surface roughness of Ra = 0.2-0.3 μm. This article describes a cast iron piston machining new workers