Machining method for manufacturing regular microtexture on surface of metal matrix or coating

Abstract

The invention discloses a machining method for manufacturing a regular microtexture on the surface of a metal matrix or coating, and belongs to the technical field of laser machining and micro-abrasive jet machining. The machining method includes steps of manufacturing a mask, and machining a texture. In the step of manufacturing the mask, a metal material or an inorganic material is used as a mask plate material, patterns are machined on the plate material by a laser machining process, the thickness of a mask plate ranges from 50 micrometers to 300 micrometers, and a ratio of the thickness of the mask plate to the diameter of the smallest pattern of the texture is required to range from 0.5 to 1.2. In the step of machining the texture, the mask is fixed onto the surface of the metal matrix or coating to be machined after the surface of the metal matrix or coating is ground and cleaned, erosion machining is carried out by a micro-abrasive jet machining technology, the erosion pressure ranges from 0.3MPa to 0.8MPa, hard abrasive grains with grain sizes smaller than 50 micrometers are selected, and the diameter of a gas jet nozzle of a spray gun ranges from 1 millimeter to 3 millimeters. The machining method has the advantages of wide application range, high machining efficiency and precision, low cost, good repeatability, controllable machined patterns and the like.

Description

Technical field: [0001] The invention relates to a method for processing a regular micro-textured surface with excellent tribological performance, and belongs to the technical fields of laser processing technology and micro-abrasive jet processing. Background technique [0002] Environment, resources and population are the three main problems facing human society today. The mechanical and electrical product manufacturing industry is the largest application field of energy and resources, and it is also an important source of environmental pollution. The operation of mechanical equipment cannot do without friction. Friction plays a beneficial role in the braking of vehicles, closing of clutches, and tightening of bolts and nuts; while friction in engines, gears, bearings, and seals not only consumes a lot of energy, but even causes parts failure, resulting in equipment failure. It is well known that the surface morphology of a friction pair has a great influence on its fric...

AI Technical Summary

Problems solved by technology

Due to the complex preparation process of the mask and the high requirements on the surface accuracy and size of the workpiece, the photolithography technology limits its application range

Although mechanical rolling and other methods have high processing efficiency and precision, the preparation of the mold is difficult and the structure is single. Partial damage to the mold during processing may affect the overall efficiency of texture processing.

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