目前市场上销售的活塞油环有整体式和组合式两:组合式油环在设计和工艺上作了改进,较前更合理、更先进、成本下降明显。改进后的活塞油环至少有三个优点:其一,老工艺油环孔量经机床铣削而成,它会产生一定的切削应力。因此在拆装和使用时容易断裂。其二,老工艺油环材料和缸体材料均系合金铸铁,摩擦情况不佳,而新工艺油环材料是 Piston oil ring currently on the market sales of the overall and combined two: modular oil ring made in the design and process improvements made more reasonable, more advanced, the cost dropped significantly. The improved piston oil ring has at least three advantages: First, the old process oil hole hole milling machine made, it will produce a certain cutting stress. Therefore, disassembly and easy to break when used. Second, the old process oil ring material and cylinder materials are alloy cast iron, friction is poor, and the new process oil ring material is