我所于1973年开始,进行活塞环的试验、研究工作。几年来,在活塞环的热加工、冷加工、表面喷涂、电镀,以及测试等方面取得了一些进展,并初步形成了活塞环全工序研究和生产的能力。考虑到单体铸造的活塞环可以获得致密、均匀的金相组织和强度较好的基体;靠模加工可以直接从铸态下获得弹力、其热稳定性较好,对于国产16V240Z型(大连工厂)、12V240Z型(二七工厂)和进口A.G.O.240V16SHR型(法国)柴油机用缸径为240毫米的活塞环,选用了单体铸造、靠模加工的生产工艺。用该工艺生产的240活塞环,已在1979年通过部级鉴定。本文重点介绍加工240活塞环用的靠模 I started in 1973, the piston ring test, research work. In the past few years, some progresses have been made in the hot working, cold working, surface coating, electroplating and testing of piston rings, and the preliminary research on the whole process of piston rings has been formed. Taking into account the single piston ring casting can get dense, uniform microstructure and better strength of the matrix; by die processing can be obtained directly from the cast elastic, its thermal stability is better, for domestic 16V240Z type (Dalian factory ), 12V240Z type (27 factories) and imported AGO240V16SHR (France) diesel engine piston diameter of 240 mm, the choice of a single casting, by die processing production process. The 240 piston ring produced by this process passed the ministerial level appraisal in 1979. This article focuses on the processing of 240 piston ring with the model