论文部分内容阅读
活塞环开口处外圆不在同一弧面上的高低现象,在我厂颇为普遍。从直径52毫米至直径180毫米的活塞环,不管是平环还是油环或不同形状环,几乎都不同程度的存在着这种不良疵病。（编者注:该厂系正圆桶体毛坯） 一片开口有高低的成品环,装缸后在内燃机的往复运动中高端和低端磨损不一,高端磨损大,低端磨损较小。一片经热定型后开口有高低的半成品环,常常会在以后的再加工时出现径向厚薄不一,造成报废。我们在分析一定的数量因开口漏光的废品环中,发现其54.4％是因开口有高低造成的。但这种现象,目前并未得到应有的重视。 为什么会产生开口有高低呢?一般往往以为是热定型时造成的。其实正确的热定型工艺决不会造成开口高低的。 其主要原因是塞铁不合理:我厂用直方柱塞铁,其横截面是长方形。按要求,装环后环心与塞铁横截面的中心线NM应相重合（图1）。实际上这是很难做到的。因
Piston ring opening at the outer surface of the arc is not the level of the phenomenon, quite widespread in our plant. Piston rings ranging from 52 mm in diameter to 180 mm in diameter have nearly all levels of defects, whether flat or oil rings or rings of different shapes. (Editor’s note: The factory is full of rough cylindrical body) an opening of the finished product ring high and low, cylinder mounted in the reciprocating internal combustion engine high and low end wear and tear, high-end wear large, low-end wear smaller. A piece of heat-setting after the opening of the semi-finished products ring, often in the future re-processing of radial thickness varies, resulting in scrapped. We analyze a certain amount of light leakage ring because of the waste ring, found that 54.4% is due to the level of the opening. However, this phenomenon has not been given due attention at present. Why is there a level of opening it? Generally thought it is caused when the heat setting. In fact, the correct heat setting process will never cause the opening level. The main reason is the irreducible iron: I plant with a straight plunger iron, the cross section is rectangular. Upon request, the center line NM of the ring center of the ferrule and the cross section of the ferrule should coincide (Fig. 1). In fact it is hard to do. because