Composite micro-texturing guide rail

Abstract

The invention discloses a method for designing a composite micro-texturing guide rail. In the invention, orderly distributed composite micro textures are initiatively processed on a working surface of the guide rail by laser, and the geometrical parameters of the composite micro textures that diameters d of recesses are equal to 100 microns to 500 microns, depths h of the recesses are equal to 1 micron to 50 microns, diameters D of raised shoulders are equal to 50 microns to 450 microns, heights H of the raised shoulders are equal to 1 micron to 70 microns, and diameters of micro bump texture flat tops are equal to 5 micron to 550 microns, area ratio is 15%-65% and interval S is equal to 200 microns to1500 microns. According to the invention, dynamic friction and static friction on surface of the guide rail can be balanced, creeping phenomenon can be inhibited effectively, service life is prolonged obviously, and stability and machining quality are improved.

Description

technical field [0001] The invention relates to a surface treatment technology of a machine tool guide rail. Through laser micromachining and polishing processes, a flat top-shaped composite micro-topography is formed on the surface of the machine tool guide rail, and specifically relates to the application of a composite micro-texture guide rail technology in the machine tool industry. technical background [0002] With the advancement of science and technology, the demand for complex precision parts has increased significantly, and precision machine tools play an important role in the machinery manufacturing industry. The guide rail of the machine tool is a key component of the whole machine, and its performance directly affects the machining accuracy and the life of the machine tool. Common defects of machine tool guide rails include: large guide rail contact area, uneven oil film distribution, increased adhesive wear; guide rail surface is in a state of boundary lubrica...

AI Technical Summary

Problems solved by technology

Common defects of machine tool guide rails include: large guide rail contact area, uneven oil film distribution, increased adhesive wear; guide rail surface is in a state of boundary lubrication, and wear is intensified; The roughness of the machined surface increases and the precision decreases; dust or chips are mixed in the lubricating oil, causing scratches and wear on the guide rail surface; due to the uneven distribution of the lubricating oil, the friction force changes suddenly and crawling occurs

Although the lubricating effect of the guide rail is improved, the plastic deformation of the soft material under the load of the worktable and the slider will directly affect the surface quality of the processed parts; and it is difficult for the soft material to adhere to the guide rail base material. easy to fall off

[0004] Chinese patent CN201783819U discloses a guide rail wear-resistant sheet, which is bonded with a layer of polytetrafluoroethylene on the surface of the guide rail. Although the wear resistance of the guide rail is improved, polytetrafluoroethylene has "cold flow", that is, the material product is long-term The plastic creep that occurs under the action of time-continuous load brings certain restrictions to the application of this characteristic on the guide rail of the machine tool, which cannot meet the actual work requirements of the guide rail; PTFE is an excellent anti-sticking material, and this performance is also Makes it extremely difficult to bond with other steel surfaces and falls off easily

[0005] Chinese patent CN101117654A uses the guide rail quenching process to improve the wear resistance of the guide rail, but the crawling phenomenon and lubrication performance of the guide rail have not been improved, and the comprehensive performance of the machine tool guide rail cannot be improved.

The rolling guide rails used in high-precision machine tools, even if the comprehensive performance of the guide rails are improved, the guide rails have complex structures, inconvenient maintenance, high manufacturing costs, and poor economy.

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