Protection method for grinding composite material coating surface

Abstract

The invention belongs to the field of machining protection, and particularly relates to a protection method for grinding the surface of a composite material coating. According to the technical scheme, high-pressure air acts on a water mist generator through a vortex tube, water mist is generated by the high-pressure air and deionized water in the water mist generator, and the water mist passes through a coating surface protection nozzle, a cutter cleaning nozzle and a cutting chip removing nozzle which are connected with the water mist generator; and the surface of the ground composite material coating is protected. According to the protection method for grinding the surface of the composite material coating, the surface of the composite material coating in the grinding process can be protected, and pollutants are prevented from entering a coating matrix to cause coating pollution.

Description

Technical Field

[0001] The invention belongs to the field of processing protection, and in particular relates to a protection method for the surface of a composite material coating during grinding processing. Background Art

[0002] When processing composite coatings for aircraft engine products, due to the non-compactness of the coating, pollutants will enter the coating matrix and cause coating contamination, which is difficult to remove and will affect product quality and have an adverse effect on aircraft engines. Summary of the invention

[0003] The invention provides a method for protecting the surface of a composite material coating during grinding, which can protect the surface of the composite material coating during the grinding process and prevent pollutants from entering the coating matrix to cause coating contamination.

[0004] The technical solution of the present invention is as follows:

[0005] A method for protecting the surface of a composite material coating during grinding processing, using high-pressure air to act on a water mist generator through a vortex tube, and generating water mist with deionized water in the water mist generator. The water mist passes through a coating surface protection nozzle, a tool cleaning nozzle, and a chip removal nozzle connected to the water mist generator, thereby protecting the composite material coating surface during grinding processing.

[0006] Furthermore, in the method for protecting the surface of a composite coating during grinding, the protective coating surface nozzle is a fan-shaped nozzle, the angle between the axis of the protective coating surface nozzle and the composite coating is 30-45°, and the front end of the protective coating surface nozzle faces the composite coating surface and blows from the cutting end of the grinding tool to the cutting end.

[0007] Furthermore, in the method for protecting the surface of a composite material coating during grinding processing, the cleaning tool nozzle is a columnar nozzle, and the position between the cleaning tool nozzle and the grinding tool is fixed during the processing; the cleaning tool nozzles are respectively arranged on both sides of the grinding tool, and the front end of the cleaning tool nozzle faces the surface of the grinding tool and blows from the tail of the grinding tool to the front end.

[0008] Furthermore, in the method for protecting the surface of a composite material coating during grinding, the chip removing nozzle is a columnar nozzle, and the position between the chip removing nozzle and the grinding tool is fixed during the machining process; the angle between the axis of the chip removing nozzle and the composite material coating is 6-12°, and the front end of the chip removing nozzle faces the cutting surface, blowing from the machined surface to the unmachined surface.

[0009] Furthermore, in the method for protecting the surface of the composite coating by grinding, the vortex tube provides cooled high-pressure air, which generates 0-5°C water mist with the deionized water in the water mist generator. After the nozzle on the protective coating surface works for 30 seconds, the water inside the composite coating is absorbed to a saturated state, and then grinding is performed to reduce the probability of pollutants entering the composite coating.

[0010] Furthermore, in the method for protecting the surface of a composite coating during grinding, the vortex tube adjusts the water mist temperature to close to 0°C, the protective coating surface nozzle operates to form micro-ice crystals on the composite coating surface for protection, and then grinding is performed to prevent contamination of the non-grinding surface of the composite coating.

[0011] Furthermore, in the method for protecting the surface of a composite material coating during grinding, the grinding tool cuts from the part substrate to the composite material coating surface during the processing, so that pollutants generated by grinding are kept away from the composite material coating surface.

[0012] Furthermore, in the method for protecting the surface of a composite material coating during grinding, the air flow rate of the nozzle protecting the coating surface is greater than the air flow rate of the nozzle for cleaning the tool and the nozzle for removing chips, so as to prevent the formation of excessive gas turbulence.

[0013] Furthermore, in the method for protecting the surface of a composite material coating during grinding, the number of the vortex tube, the water mist generator, the coating surface protection nozzle, the tool cleaning nozzle and the chip removal nozzle is determined according to actual needs.

[0014] Furthermore, the method for protecting the surface of the composite material coating after grinding, the method for cleaning the composite material coating after grinding is as follows: the composite material coating is placed in water, and then a hose connected to a negative pressure device is used to move left and right along the contaminated part of the surface of the composite material coating, and the porous and water-permeable characteristics of the composite material coating are utilized to make the water flow rapidly through the contaminated part of the composite material coating, and the flowing water flow is used to carry away the contaminated particles.

[0015] The beneficial effects of the present invention are as follows: the protection method for the surface of a composite material coating during grinding processing provided by the present invention can protect the surface of the composite material coating during the grinding process and prevent pollutants from entering the coating matrix to cause coating contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an implementation mode of the present invention;

[0017] Figure 2 The protective coating surface nozzle, tool cleaning nozzle and chip removal nozzle are used to protect the composite coating surface during grinding. 1 is the part substrate;

[0018] Figure 3 It is a schematic diagram of a fan-shaped nozzle;

[0019] Figure 4 Schematic diagram of a cylindrical nozzle. DETAILED DESCRIPTION

[0020] like Figure 1-4 As shown, a method for protecting the surface of a composite material coating that is being ground is used, which uses high-pressure air to act on a water mist generator through a vortex tube to generate water mist with deionized water in the water mist generator. The water mist passes through a coating surface protection nozzle 6, a tool cleaning nozzle 5 and a chip removing nozzle 4 connected to the water mist generator to protect the surface of the composite material coating 2 that is being ground.

[0021] The protective coating surface nozzle 6 is a fan-shaped nozzle to increase the protection area; the angle between the axis of the protective coating surface nozzle 6 and the composite coating 2 is 35°, and the front end of the protective coating surface nozzle 6 faces the composite coating surface 2 and blows from the cutting end of the grinding tool 3 to the cutting end. The cleaning tool nozzle 5 is a columnar nozzle to increase the cleaning force; the position between the cleaning tool nozzle 5 and the grinding tool 3 is fixed during the processing; the cleaning tool nozzle 5 is respectively set on both sides of the grinding tool 3, and the front end of the cleaning tool nozzle 5 faces the surface of the grinding tool 3 and blows from the tail of the grinding tool 3 to the front end. The chip removal nozzle 4 is a columnar nozzle to increase the cleaning force; the position between the chip removal nozzle 4 and the grinding tool 3 is fixed during the processing; the angle between the axis of the chip removal nozzle 4 and the composite coating 2 is 9°, and the front end of the chip removal nozzle 4 faces the cutting surface and blows from the processed surface to the unprocessed surface. The air flow rate of the protective coating surface nozzle 6 is greater than the air flow rate of the cleaning tool nozzle 5 and the chip removal nozzle 4 to prevent the formation of excessive gas turbulence.

[0022] The vortex tube provides cooled high-pressure air to generate water mist with deionized water in the water mist generator. The vortex tube adjusts the water mist temperature to close to 0°C. The protective coating surface nozzle 6 works to form micro-ice crystals on the surface of the composite coating 2 for protection, and then the grinding process is performed to prevent contamination of the non-grinding surface of the composite coating 2. The cooling air source provided by the vortex tube can reduce the heat in the processing area and increase the life of the grinding tool 3.

[0023] During the machining process, the grinding tool cuts from the part substrate to the composite coating surface, so that the pollutants generated by grinding are kept away from the composite coating surface.

[0024] The number of the vortex tubes, water mist generators, protective coating surface nozzles 6, tool cleaning nozzles 5 and chip removal nozzles 4 is determined according to actual needs; the number of protective coating surface nozzles 6 is determined according to the area of ​​the composite material coating 2 to cover the entire coating surface; multiple vortex tubes with multiple nozzles can be used.

[0025] The cleaning method of the composite material coating 2 after grinding is as follows: place the composite material coating 2 in water, and then use a hose connected to a negative pressure device to move left and right along the contaminated part of the surface of the composite material coating 2, and use the porous and water-permeable characteristics of the composite material coating 2 to make the water flow rapidly through the contaminated part of the composite material coating 2, and use the flowing water to carry away the contaminated particles.

Claims

1. A method for protecting the surface of a composite material coating during grinding, characterized in that: High-pressure air is used to act on the water mist generator through a vortex tube, and water mist is generated with the deionized water in the water mist generator. The water mist passes through the protective coating surface nozzle, the tool cleaning nozzle and the chip removing nozzle connected to the water mist generator to protect the surface of the composite material coating that is being ground.

2. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The protective coating surface nozzle is a fan-shaped nozzle, the angle between the axis of the protective coating surface nozzle and the composite material coating is 30-45 degrees, the front end of the protective coating surface nozzle faces the composite material coating surface, and blows from the cutting end to the cutting end of the grinding tool.

3. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The cleaning tool nozzle is a cylindrical nozzle, and the position between the cleaning tool nozzle and the grinding tool is fixed during the processing; the cleaning tool nozzles are respectively arranged on both sides of the grinding tool, and the front end of the cleaning tool nozzle faces the surface of the grinding tool and blows from the tail of the grinding tool to the front end.

4. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The chip removal nozzle is a columnar nozzle, and the position between the chip removal nozzle and the grinding tool is fixed during the machining process; the angle between the axis of the chip removal nozzle and the composite material coating is 6-12°, and the front end of the chip removal nozzle faces the cutting surface and blows from the machined surface to the unmachined surface.

5. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The vortex tube provides cooled high-pressure air, which generates 0-5°C water mist with the deionized water in the water mist generator. After the nozzle on the protective coating surface works for 30 seconds, the composite coating absorbs water to a saturated state, and then performs grinding to reduce the probability of pollutants entering the composite coating.

6. The method for protecting the surface of a composite material coating during grinding according to claim 5, characterized in that: The vortex tube adjusts the water mist temperature to close to 0°C, and the protective coating surface nozzle works to form micro ice crystals on the composite coating surface for protection, and then the grinding process is performed to prevent contamination of the non-grinding surface of the composite coating.

7. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: During the machining process, the grinding tool cuts from the part substrate to the composite coating surface, so that the pollutants generated by grinding are kept away from the composite coating surface.

8. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The air flow rate of the nozzle for protecting the coating surface is greater than the air flow rate of the nozzle for cleaning the tool and the nozzle for removing chips to prevent the formation of excessive gas turbulence.

9. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The number of the vortex tubes, water mist generators, protective coating surface nozzles, tool cleaning nozzles and chip removal nozzles is determined according to actual needs.

10. The method for protecting the surface of a composite material coating during grinding according to claim 1, characterized in that: The cleaning method of the composite coating after grinding is as follows: place the composite coating in water, and then use a hose connected to a negative pressure device to move left and right along the contaminated part of the composite coating surface. Utilize the porous and water-permeable characteristics of the composite coating to make the water flow rapidly through the contaminated part of the composite coating, and use the flowing water to carry away the contaminated particles.

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