Discontinuous rotation surface cast iron inlaying ring

Abstract

The invention relates to the field of piston manufacture parts, and particularly relates to a cast iron inlaying ring. The discontinuous rotation surface cast iron inlaying ring comprises an inlaying ring main body in a shape of a circular ring, the inner lateral face, the upper lateral face or the lower lateral face of the inlaying ring main body are discontinuous rotation surfaces. By means of the technical scheme, combination between the inlaying ring and an aluminum substrate is tight, big tangential machining force can be borne, and quantity of unqualified products in piston machining can be effectively reduced. In a using process of a piston, capacity of the cast iron inlaying ring on peeling main body materials of the piston is improved, and reliability of the piston is improved. Simultaneously, contact area between the inlaying ring and the aluminum substrate is increased, heat at the head of the piston is easy to discharge from the inlaying ring, head temperature of the piston is lowered, and reliability of the piston is improved.

Description

technical field [0001] The invention relates to the field of piston manufacturing parts, in particular to a cast iron insert ring. Background technique [0002] The piston is the "heart" of the engine, which bears alternating mechanical loads and thermal loads, and is one of the key components in the engine with the worst working conditions. In order to improve the service life of the piston, people change the aluminum alloy piston into a cast iron piston. In this way, the aluminum ring groove is changed into a cast iron ring groove, and the wear resistance is greatly improved. But after such design, the weight of the piston doubles and the motion inertia increases, which brings many adverse effects on the connecting rod, crankshaft, bearing bush and even the whole engine. Therefore, people combine the high temperature and wear resistance of cast iron pistons with the light weight of aluminum pistons, and use cast iron to make a wear-resistant insert ring in the piston rin...

AI Technical Summary

Problems solved by technology

This kind of cast iron insert whose surface is a rotary surface is not strong enough to resist tangential machining force

Due to the difference in thermal expansion coefficient between the cast iron insert and the aluminum piston body, under the action of alternating mechanical loads and cold and heat loads, if the bond between the cast iron insert and the piston body is not good, the cast iron insert and the piston body There is a possibility of looseness between the aluminum pistons. Once loosened, it may cause the piston ring bank to break, and the engine will fail and cannot work.

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