Laser micro-texturing method of piston ring

Abstract

The invention discloses a laser micro-texturing method of a piston ring meeting the national V emission standard. The method includes the following steps that the optimal friction pair contact surface parameter is selected, and a piston ring-cylinder sleeve friction pair surface fluid lubrication theoretical model is built; the optimal theoretical morphology of the friction surface of the piston ring is built, and the radius and the depth of a cavity in the outer-circle sealing surface of the piston ring, the area ratio of the cavity, the radius and the depth of cavities in the upper end face and the lower end face and the area ratio of the cavities are determined; the same-point single pulse interval multiple laser micro-machining process is used for performing laser micro-texturing machining on the working surface of the piston ring. According to the laser micro-texturing method of the piston ring, through the surface morphology of the laser micro-textured piston ring, the piston ring can be directly machined in the air environment, and no pollution is generated, and no noise is generated; the kinetic friction coefficient of the piston ring can be reduced in the use process of the piston ring, the friction power consumption is reduced, the service life of the piston ring is effectively prolonged, the fuel consumption rate and machine oil are reduced, and the PM2.5 value in tail gas is lowered.

Description

technical field [0001] The invention relates to a piston ring, in particular to a manufacturing method of the piston ring. Background technique [0002] Piston ring is a metal ring used to insert into the piston groove. The traditional manufacturing process of piston ring is: rough, annealing, rough grinding, quenching and tempering, fine grinding, surface treatment, demagnetization, smooth grinding, oiling and storage. Among them, the surface treatment of the outer circular working face is mainly chrome plating, molybdenum spraying and nitriding. The manufacturing process not only pollutes the environment, but also causes problems such as high frictional power consumption, high oil consumption, and high PM2.5 content in the exhaust gas during use of the piston ring. For details, see the oil film pressure distribution of the untextured piston ring. figure 1 , 2 , high peak pressure and extremely uneven distribution. Contents of the invention [0003] Purpose of the inve...

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Problems solved by technology

The manufacturing process not only pollutes the environment, but also causes problems such as high frictional power consumption, high oil consumption, and high PM2.5 content in the exhaust gas during use of the piston ring. For details, see the oil film pressure distribution of the untextured piston ring. figure 1 , 2 , high peak pressure, extremely uneven distribution

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