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Method for preparing micro-texture self-lubricating ceramic guide rail

A self-lubricating, micro-textured technology, applied in the field of machine tools, can solve the problems of matrix plastic aging, lower machine precision, poor thermal conductivity, etc.

Inactive Publication Date: 2018-01-16
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness of the metal guide rail material is low. When the guide rail bears a large load, the iron filings and sand grains of the rough machining blank will easily cause wear and strain on the guide rail. product quality
Plastic guide rails have good manufacturability, low cost, and good low-speed crawling resistance, but have poor thermal conductivity, large linear expansion coefficient, and there are problems of bonding with the substrate and plastic aging
With the development of high-efficiency automated CNC machine tools, high-precision precision machine tools and heavy-duty machine tools, the types and types of machine tool guide rails are constantly changing, and then there are static pressure guide rails and magnetic levitation machine tool guide rails. The cost and maintenance costs of such guide rails are relatively high. , currently only used for large-scale high-precision CNC machine tools

Method used

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  • Method for preparing micro-texture self-lubricating ceramic guide rail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Take raw materials according to the mass percentage of alumina 97%, diopside 3%; Mix the weighed raw materials, add 0.8% (mass percentage, the same below) PVA and 0.5% ammonium polyacrylate, and remove Ionized water was mixed with a mass ratio of 3:2, put into a ball mill barrel made of polyurethane, and then sprayed and granulated for 100 hours; The temperature is 95~110℃, the feeding speed is controlled at 10~14ml / min, and the diameter of the nozzle hole is 1mm; the mixed powder after granulation is vacuum grouted, and the vacuum grouted blank is molded at 20~30 Dry at room temperature at a temperature of ℃, and the dried blank is compacted by cold isostatic pressing under an oil pressure of 180 MPa, and the holding time is 10 minutes; the ceramic blank after cold isostatic pressing is placed in the The gas-fired energy-saving intermittent sintering furnace is buried in the air, the sintering temperature is 1500°C, the heating time is 70 hours, and the h...

Embodiment 2

[0021] Embodiment two: other is the same as embodiment one, difference is to take raw material according to the mass percent of aluminum oxide 93%, diopside 4%, iron oxide 3%; During spray granulation, binding agent content is 1%, disperses The additive content is 0.8%; the cold isostatic oil pressure is 200MPa, and the sintering temperature is 1580°C. Microholes (4) are processed on the fixed guide rail (5) and the movable guide rail (2) by using femtosecond laser processing technology. Filled with MoS with a diameter of 1 μm 2 Grease. The bending strength of the ceramic guide rail is 321~349MPa, the Vickers hardness is 12~14GPa, the fracture toughness is 4.1~4.6, and the friction coefficient is 0.105 when the load is 200N and the speed is 300 mm / min.

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Abstract

The present invention belongs to the field of machine tools, and particularly relates to a method for preparing a micro-texture self-lubricating ceramic guide rail. The ceramic guide rail is made of alumina, diopside and iron oxide as raw materials. The method for preparing the micro-texture self-lubricating ceramic guide rail is characterized in that pressure-less sintering is carried out according to the ratio of raw materials including, by mass percentage, 89% to 99% of alumina, 1% to 5% of diopside and 0% to 6% of iron oxide, and the produced product blank is subjected to coarse and fine grinding process in the processing center of CNC brittle material by using a diamond grinding wheel to prepare a movable guide rail and a fixed guide rail. Micropores for storing a solid lubricant areprocessed on the surfaces of the fixed guide rail and the movable guide rail by using the femtosecond laser processing technology, and screw holes are processed on the fixed guide rail and the movableguide rail by the electric discharge machining technology and are fixed on the machine body by screw connection. The solid lubricant is added to the micropores. When the movable guide rail reciprocates on the fixed guide rail, the solid lubricant is dragged between the friction pairs to form a continuous solid lubricating layer, so as to reduce the friction, reduce the wear and improve the life of the guide rail.

Description

technical field [0001] The invention belongs to the field of machine tools, in particular to a method for preparing a micro-textured self-lubricating ceramic guide rail. Background technique [0002] The function of the machine tool guide rail is to support and guide the workbench, tool rest and other executive parts, and ensure their motion accuracy. Therefore, guide rails are widely used in processing equipment such as metal cutting machine tools, grinding machines and CNC machine tools. Existing guide rails are usually paired pairs of several metal guide rails such as cast iron-cast iron, cast iron-hardened steel, hardened steel-hardened steel. The hardness of the metal guide rail material is low. When the guide rail bears a large load, the iron filings and sand grains of the rough machining blank will easily cause wear and strain on the guide rail. product quality. Plastic guide rails have good manufacturability, low cost, and good low-speed crawling resistance, but h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/01B24B7/14B24B7/22B23K26/382B23H9/14B23H1/00C04B35/10C04B35/622C04B35/64
Inventor 刘长霞孙军龙张凤明
Owner LUDONG UNIVERSITY
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