目前,所有的柴油机制造工厂都是用圆形简体一热定形的方法制造活塞环的。这种方法有一定的优点(主要是工艺简单),但也有很大的缺点。首先是不能制出具有计算径向压力分布图形的活塞环。此外还有资料介绍,用热定形法制造的活塞环在其物理一机 At present, all diesel engine manufacturing plants manufacture piston rings in the form of a round and a simple heat-setting method. This method has some advantages (mainly simple process), but also has great drawbacks. The first is that a piston ring with a graph for calculating the radial pressure distribution can not be made. In addition there is information on the use of heat-set piston rings made in its physical a machine