Piston ring machining device

Abstract

The invention discloses a piston ring machining device. The piston ring machining device comprises a die sleeve which is used for limiting the radial direction of a piston ring and a pressing plate assembly which is used for realizing radial outward bending of the piston ring, wherein the pressing plate assembly comprises a left pressing plate and a right pressing plate; the left pressing plate is arranged on one inner axial side of the die sleeve; the right pressing plate is used for pushing the piston ring to the left pressing plate and is matched with the left pressing plate to perform radial outward bending on the piston ring; and the right pressing plate is positioned on the other inner axial side of the die sleeve and is coaxial to the left pressing plate. According to the piston ring machining device, by adopting the left and right pressing plates, the piston ring is bent, and distortion volume is formed; and the situation that the inner side wall of the piston ring is cut into a chamfer structure and then is assembled on an engine is not needed, and then distortion is naturally produced; and moreover, the piston ring machining device has the advantages of being low in machining difficulty and high in sealing property of the machined piston ring.

Description

technical field [0001] The invention relates to the technical field of piston rings, in particular to a piston ring processing device. Background technique [0002] The piston ring is a metal ring used to embed in the groove of the piston. The piston ring is divided into two types: compression ring and oil ring. The piston ring is a metal elastic ring with a large outward expansion deformation. In the corresponding annular groove, the reciprocating and rotating piston ring, relying on the pressure difference of gas or liquid, forms a seal between the outer circular surface of the ring and the cylinder, as well as one side of the ring and the ring groove. [0003] Rectangular piston rings are distorted when assembled to the engine. With the continuous improvement of emission standards, the requirements for piston ring sealing are getting higher and higher, especially for supercharged engines. To achieve good sealing performance, the mainstream design is twisted piston rings. ...

AI Technical Summary

Problems solved by technology

[0003] Rectangular piston rings are distorted when assembled to the engine. With the continuous improvement of emission standards, the requirements for piston ring sealing are getting higher and higher, especially for supercharged engines. To achieve good sealing performance, the mainstream design is twisted piston rings. At present, domestic and foreign distorted piston rings are twisted by cutting the inner wall of the piston ring into a chamfered structure and then assembling it into the engine to naturally distort it. The cross-section of this distorted piston ring will lead to low sealing performance and chamfering. Removal of corner material makes machining difficult and costly

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