活塞环是锻锤气缸中起密封作用的重要零件,过去均由金属材料制造。由于我厂机械加工能力有限,制造的金属活塞环质量不过关,加之对机床维护不善,经常出现气缸研伤、拉毛,有时拉伤面积达40～90％,深度达0.5～1.0毫米,以致修复很困难。在厂党委的领导下,我们组成了三结合的研制小组,决定用聚四氟乙烯塑料活塞环代替金属环。首先在2吨模锻锤上进行了试验,並取得了成功。继之,又在5吨模锻锤、25吨-米无砧座锤上应用,效果亦 The piston ring is an important part that plays a role in the sealing of the hammer cylinder. It was made of metal materials in the past. Due to the limited machining capacity of our factory, the quality of the manufactured metal piston rings is not enough, and in addition to the poor maintenance of the machine tools, cylinder grinding and pulling are often found. Sometimes, the area of ​​the wound is 40 to 90%, and the depth is 0.5 to 1.0 mm, resulting in repairs. Very difficult. Under the leadership of the factory party committee, we formed a three-combination development team and decided to replace the metal ring with a PTFE plastic piston ring. The test was first performed on a 2 ton forging hammer and succeeded. Followed by the application of a 5-ton die forging hammer and a 25-ton-meter anvilless hammer.