Composite micro-texturing guide rail

A technology of micro-texture and guide rail, which is applied to large fixed members, metal processing machinery parts, metal processing equipment, etc., can solve the problems of increased wear, excessively thick oil film, uneven distribution of oil film, etc., so as to prolong the life of guide rails and improve the lubrication performance. , the effect of improving the overall performance

Inactive Publication Date: 2015-04-29
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The embodiment of the present invention provides a preparation method for a CA6140 ordinary lathe composite micro-textured guide rail. The steps are: Step 1, CA6140 ordinary lathe, the guide rail type is a rectangular sliding guide rail, the composite micro-topography type is spherical crown, and the micro-topography specific parameters: pits Diameter 8d=100-500um, pit depth 5h=1-50um, shoulder diameter 7D=50-450um, shoulder height 6H=1-70um, micro-protrusion flat top diameter 9 is 5-500um, shape Spacing 4S=200-1500um, compound micro modeling The area occupancy rate is 15%-65%.

[0037] Step 2, the guide rail surface 2 needs to undergo a pretreatment process before laser micromachining. The pretreatment process adopts grinding to make the guide rail surface 2 precision meet the requirements of laser micromachining. Surface roughness parameters: the arithmetic mean deviation of the contour Ra≤0.8 um, the maximum height of the profile Rz≤3.2um, geometric tolerance: both...

Embodiment 2

[0043] The difference between Example 2 and Example 1 is that the type of composite microtopography is crater type, and the type of crater is a composite microtopography with concave and surrounding convex in the middle, and the specific geometric parameters of the topography are: pit diameter 8d=100 -500um, pit depth 5h=1-50um, shoulder height 6H=1-70um, micro-protrusion shape flat top diameter 9 is 100-550um, shape spacing 4S=200-1500um, composite micro modeling The area occupancy rate is 15%-65%.

Embodiment 3

[0045] Embodiment three, such as picture As shown in 7, the composite microtopography of the present invention is applied to the static guide rail 16 of the triangular guide rail, corresponding to the moving guide rail 15 of the triangular guide rail.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/01B23P15/00
CPCB23P17/00B23Q1/017
Inventor 符永宏王林森康正阳符昊纪敬虎
Owner JIANGSU UNIV
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