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Preparation method for anti-slip coating of floating clamp

A technology of anti-slip coating and clamps, which is applied in the field of preparation of anti-slip coatings for floating clamps, can solve the problems affecting the accuracy of machine tools and trouble-free working time, increasing the friction resistance between clamps and plates, and affecting the quality of products in the production process, etc. Achieve the effect of being suitable for large-area spraying, improving product quality, high density and hardness

Inactive Publication Date: 2018-01-05
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the structure of the lathe clamp is not complicated, the efficiency of the CNC lathe is high, and the wear of the clamp is inevitable, which affects the accuracy of the machine tool and the trouble-free working time. The design should take into account the appropriate selection of clamp material and processing technology to prolong its life. continuous working time
At the same time, traditional floating or fixed clamps usually adopt a dovetail groove structure to increase the frictional resistance between the clamp and the plate
With the traditional dovetail groove structure, when the clamping force is small, the sheet will be displaced relative to the clamp; when the clamping force is large, there will be problems such as local deformation of the sheet during the clamping process, which will affect the production process and the quality of the final product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Use acetone to ultrasonically clean the surface of the floating clamp to remove impurities such as oil, rust, etc., and dry it immediately after cleaning to prevent rust.

[0046] 2. Use brown corundum with a particle size of 20 mesh to roughen the surface of the floating clamp to be sprayed to improve the bonding strength between the coating and the substrate, and the surface roughness after roughening is required to be greater than Ra 7.0.

[0047] 3. Select 10Co4CrWC powder with a particle size of 15-45μm, and dry the powder in an oven at 100°C for 2 hours before spraying.

[0048] 4. Supersonic flame spray coating is used on the surface of the floating clamp base, and the air pressure is fixed at 0.6MPa during spraying, O 2 The flow rate is 55m 3 / h, the kerosene is 23L / h, the powder feeding rate is 90g / min, and the spraying distance is 33cm. Use aluminum foil to protect the non-sprayed surface during the spraying process.

[0049] 5. Immediately after the spr...

Embodiment 2

[0053] The difference between this embodiment and embodiment 1 is that in step 3, WC-12Co powder with a particle size of 30-70 μm is selected; in step 4, the air pressure is fixed at 0.6 MPa when spraying on the surface of the floating clamp substrate, o 2 The flow rate is 55m 3 / h, the kerosene is 23L / h, the powder feeding rate is 120g / min, and the spraying distance is 35cm.

[0054] A non-slip and wear-resistant WC-12Co ceramic coating with a thickness of about 240 μm and a hardness of about 1100HV0.1 was prepared on the surface of the floating clamp. The coefficient of friction is high, the wear resistance is good, and the porosity of the coating is about 2%.

Embodiment 3

[0056] The difference between this embodiment and embodiment 1 is that in step 3, the WC-12Co powder with submicron and nano particle size mixed at 7:3 is selected; in step 4, the air pressure is fixed at 0.75MPa during spraying, O 2 The flow rate is 50m 3 / h, the kerosene is 22L / h, the powder feeding rate is 100g / min, an 8-inch spray gun is used, and the spraying distance is 30cm.

[0057] A non-slip and wear-resistant WC-12Co ceramic coating with a thickness of about 240 μm and a hardness of about 1300HV0.1 is prepared on the surface of the floating clamp. The coating prepared by this method has a low porosity of about 1% and a high friction coefficient , good wear resistance.

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Abstract

The invention relates to a preparation method for an anti-slip coating of a floating clamp. The preparation method comprises the following steps that sand-blasting roughening treatment is conducted ona working face of the floating clamp with brown fused alumina, metal ceramic powder is sprayed on the surface of a base body of the working face of the floating clamp with adoption of a supersonic flame spraying technology, the anti-slip and abrasion-resistant coating is prepared, and sprayed workpieces are wrapped with asbestos and are placed in air for natural cooling. According to the preparation method for the anti-slip coating of the floating clamp, defects which exist in a previous dovetail groove structure are overcome; metal ceramics are used as spraying materials, commercial powder can be directly purchased and used for the spraying materials, quality of the coating is higher, the service life is longer, spraying efficiency is high, and cost is low; and the heat influence on thebase body of the floating clamp in the spraying process is small, and texture and the shape of the base body are not changed.

Description

technical field [0001] The invention relates to engineering and material science, in particular to a preparation method of an anti-slip coating for floating clamps. Background technique [0002] my country's CNC machine tool industry is developing rapidly, but there is still a significant gap between most products and foreign advanced CNC processing equipment. The gap in the research and development of medium-to-high-end and large-scale CNC machine tools is even more obvious, and more than 70% of functional components rely on imports . As a basic industry in my country, the machine tool manufacturing industry has a wide range of influence and great influence. To a certain extent, it determines the international competitiveness of our country. It has become the consensus of the whole society to vigorously revitalize the equipment manufacturing industry. [0003] Although the structure of the lathe clamp is not complicated, the efficiency of the CNC lathe is high, and the wear...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06
Inventor 张超吴庆丹肖金坤卞正文庄瑞斌
Owner YANGZHOU UNIV
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