Repairing method for composite material cartridge receiver

Abstract

The invention belongs to the field of composite material surface repairing, and particularly relates to a composite material cartridge receiver repairing method. According to the technical scheme, the repairing method for the composite material casing comprises the following steps that a modified epoxy resin type normal-temperature curing high-temperature-resistant adhesive is determined to serve as an adhesive for the composite material casing; abrasive paper is used for polishing the edge of the damaged part and the damaged part; performing oil removal and cleaning; the periphery of the damaged part is protected; coating an adhesive by using a scraper; the part is placed in a dry and ventilated place; covering a temperature-adjustable silica gel heating plate on the gluing surface for heating and curing; and local polishing is conducted, so that the glued surface is smooth and is in smooth connection with the surrounding composite material base body. According to the composite material cartridge receiver repairing method, after the damaged part is coated with the adhesive, the temperature-adjustable silica gel heating plate is selected for heating, curing and polishing, repairing of the composite material cartridge receiver is achieved, and the part production requirement is met.

Description

Technical Field

[0001] The invention belongs to the field of composite material surface repair, and in particular relates to a composite material casing repair method. Background Art

[0002] During the use of composite material casing, its inner surface will have different damages. According to the damage of composite material casing, the composite material casing can be repaired through repair process to reduce cost and improve efficiency.

[0003] According to the structural characteristics, strength, stiffness and other requirements of composite parts, the repair methods mainly include non-patching and patching. Patching repair can protect the damaged parts from secondary damage. At present, the repair of composite casings has the following problems: 1. Evaluation of high temperature resistance of adhesives; in view of actual use needs, in order to ensure the reliability of use under high temperature, thermal vibration and scouring conditions, the bonding strength between adhesives and composite casings is the focus of assessment. Shear strength tests at 280°C are required. Due to the special materials and high temperatures, it is difficult to clamp the test pieces. The specific parameters and test methods of the test process need to be determined through experiments to comprehensively evaluate its high temperature resistance. 2. Determination of the bonding process; in order to ensure the application of adhesives to the damaged parts, it is necessary to explore the process route, including parts cleaning, glue coating process, curing process and adhesive surface treatment after curing. Summary of the invention

[0004] The present invention provides a composite material casing repair method, which realizes composite material casing repair by applying adhesive to the damaged part and then using a temperature-adjustable silicone heating plate for heating, curing and polishing to meet the parts production needs.

[0005] The technical solution of the present invention is as follows:

[0006] A composite material casing repair method comprises the following steps:

[0007] Step 1: Through the temperature resistance test and high temperature shear performance evaluation, determine the modified epoxy resin room temperature curing high temperature resistant adhesive as the adhesive for the composite casing;

[0008] Step 2: Use sandpaper to fully polish the edges of the damaged parts of the composite casing;

[0009] Step 3: Use sandpaper to polish the damaged parts of the composite casing;

[0010] Step 4: Use acetone to degrease the damaged parts of the composite casing; use anhydrous ethanol to clean the damaged parts of the composite casing;

[0011] Step 5: Use tooling or tape to protect the damaged area around the composite casing;

[0012] Step 6: Use a scraper to apply a room temperature curing high temperature resistant adhesive of a modified epoxy resin type on the surface of the damaged part of the composite casing;

[0013] Step 7: Remove the protective tooling or tape and place the parts in a dry and ventilated place;

[0014] Step 8: Check the glued surface. If there is glue missing or unevenness, wipe it off with absorbent cotton dipped in acetone and re-apply glue to repair it;

[0015] Step 9: Cover the glued surface with a temperature-adjustable silicone heating plate for heating and curing;

[0016] Step 10: Perform local grinding to make the glue-coated surface smooth and smoothly connected with the surrounding composite material matrix.

[0017] Furthermore, in the composite material casing repair method, in step 2, the edge of the damaged portion of the composite material casing is polished with 800-grit sandpaper.

[0018] Furthermore, in the composite material casing repair method, in step 3, the damaged portion of the composite material casing is polished with 80-120 grit sandpaper.

[0019] Furthermore, in the composite material casing repair method, in step 4, the casing is left to air-dry for 15 to 20 minutes after degreasing and cleaning.

[0020] Furthermore, in the composite casing repair method, in step 7, the composite casing is left to stand in a dry and ventilated place for 8 hours to 16 hours.

[0021] Furthermore, in the composite material casing repair method, in step 9, the curing parameters are 100°C ± 10°C for 4h to 4.5h.

[0022] Furthermore, in the composite material casing repair method, in step 10, the local polishing is first performed by polishing the glue-coated surface with No. 180 sandpaper and then polishing it with No. 800 sandpaper.

[0023] The beneficial effects of the present invention are as follows: the present invention realizes the repair of composite casings by using a temperature-adjustable silicone heating plate to heat and solidify the damaged part after coating, and a protective polishing method during the coating process, so as to meet the production requirements of parts and ensure that the damaged part of the part will not be damaged again. This process can reduce production costs and improve work efficiency. DETAILED DESCRIPTION

[0024] A composite material casing repair method comprises the following steps:

[0025] 1. Use 800-grit sandpaper to fully sand the edges of the damaged parts of the composite casing until the edges no longer peel off, and use a brush to gently remove the particles formed by sanding;

[0026] 2. Use 80-120 grit sandpaper to polish the damaged part until the surface is rough;

[0027] 3. Degrease the damaged area with acetone and leave it in the air for 18 minutes; clean the damaged area with anhydrous ethanol and leave it in the air for 18 minutes;

[0028] 4. Use a non-damaging and non-polluting tape around the damaged area to protect it, leaving the damaged area exposed in the middle;

[0029] 5. Place the modified epoxy resin room temperature curing high temperature resistant adhesive in a clean beaker or plastic container and stir with a stirring rod for 10 to 15 minutes until the color is uniform;

[0030] 6. Use a scraper to apply a modified epoxy resin type room temperature curing high temperature resistant adhesive on the surface of the damaged part, keep the glue-coated part level, control the amount of glue, make it level, and cover the damaged part;

[0031] 7. Remove the protective tape and place the casing coated with adhesive in a dry and ventilated place for 10 hours;

[0032] 8. Cover the adhesive surface with an adjustable temperature silicone heating plate, adjust the heating temperature, use a thermometer to test the adhesive surface temperature, control it at 100℃±10℃, and keep it warm for 4 hours;

[0033] 9. Check the surface of the glue repair; if the surface is flat, there is no need to treat the cured surface; if the surface is uneven, use a tape that does not damage or pollute the substrate to protect the surrounding area of ​​the glue coating, and use No. 180 sandpaper to grind the glue coating surface; then use No. 800 sandpaper to grind it to make the surface flat and smoothly connected with the surrounding composite material substrate.

Claims

1. A composite material casing repair method, characterized in that: The steps include: Step 1: Through the temperature resistance test and high temperature shear performance evaluation, determine the modified epoxy resin room temperature curing high temperature resistant adhesive as the adhesive for the composite casing; Step 2: Use sandpaper to fully polish the edges of the damaged parts of the composite casing; Step 3: Use sandpaper to polish the damaged parts of the composite casing; Step 4: Use acetone to degrease the damaged parts of the composite casing; use anhydrous ethanol to clean the damaged parts of the composite casing; Step 5: Use tooling or tape to protect the damaged area around the composite casing; Step 6: Use a scraper to apply a room temperature curing high temperature resistant adhesive of a modified epoxy resin type on the surface of the damaged part of the composite casing; Step 7: Remove the protective tooling or tape and place the parts in a dry and ventilated place; Step 8: Check the glued surface. If there is glue missing or unevenness, wipe it off with absorbent cotton dipped in acetone and re-apply glue to repair it; Step 9: Cover the glued surface with a temperature-adjustable silicone heating plate for heating and curing; Step 10: Perform local grinding to make the glue-coated surface smooth and smoothly connected with the surrounding composite material matrix.

2. The composite casing repair method according to claim 1, characterized in that: In step 2, the edge of the damaged portion of the composite casing is polished with 800-grit sandpaper.

3. The composite casing repair method according to claim 1, characterized in that: In step 3, the damaged part of the composite casing is polished with 80-120 grit sandpaper.

4. The composite casing repair method according to claim 1, characterized in that: In the step 4, after degreasing and cleaning, the product is left to air-dry for 15 to 20 minutes respectively.

5. The composite casing repair method according to claim 1, characterized in that: In step 7, the mixture is allowed to stand in a dry and ventilated place for 8 to 16 hours.

6. The composite casing repair method according to claim 1, characterized in that: In step 9, the curing parameters are 100° C.±10° C. for 4 h to 4.5 h.

7. The composite casing repair method according to claim 1, characterized in that: In step 10, the local polishing is first performed by polishing the glue-coated surface with 180-grit sandpaper and then with 800-grit sandpaper.