A kind of equipment and method for rapidly depositing dlc film layer on the surface of piston ring

Abstract

The invention discloses an apparatus for rapidly depositing a DLC film on the surface of a piston ring, and a method thereof. The apparatus comprises: an ion injection system used for vertically uniformly injecting ion flow; a vacuum chamber, wherein one end of the vacuum chamber is in sealing connection with the ion injection system, the other end of the vacuum chamber is in sealing connection with one end of a broad-beam magnetic filtering deposition system, and the other end of the broad-beam magnetic filtering deposition system is provided with an FCVA deposition cathode; a tool system used for realizing autorotation of a piston ring tool cylinder; and an intelligent control device used for controlling the ion injection and film deposition process, displaying a measurement result and preliminarily processing data. The apparatus and the method can realize large-batch uniform plating of the surface of the piston ring with the DLC film with high hardness and low friction coefficient.

Description

technical field [0001] The invention relates to the field of nuclear science technology and application, in particular to a system for coating a DLC (high-performance diamond-like carbon) film on the surface of a piston ring. Background technique [0002] In general, due to the special working environment of the engine piston ring, it is required to have a low friction coefficient and high hardness. The existing piston ring coating is mainly chromium nitride ultra-thick coating, but the main disadvantage of this ultra-thick coating is that the coefficient of friction is relatively large. [0003] As people pay more attention to the environment, higher requirements are put forward for the combustion efficiency and heat conversion efficiency of piston rings. The study found that the DLC film can well meet the current requirements of high hardness and low friction coefficient. At present, it is mainly Utilize chemical vapor deposition (CVD, Chemical Vapor Deposition) technolog...

AI Technical Summary

Problems solved by technology

[0004] 1) The deposition rate of DLC film is relatively slow, and the relative time cost is relatively high for industrial production;

[0005] 2) The internal compressive stress of the DLC film is relatively large, and it is difficult to realize the preparation of an ultra-thick film. At the same time, the bonding force between the DLC film and the piston ring is relatively poor and cannot meet the requirements of actual industrial applications;

[0006] 3) The life of the existing piston ring is difficult to reach 3000 hours or more in the normal operation of the engine

[0007] Therefore, there is an urgent need to improve the film thickness and friction coefficient of the engine piston ring, but it is difficult to achieve it with existing equipment or technology.

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