CN105643962A - Method for repairing R corner of tool - Google Patents

Description

A method for repairing tooling R angle

technical field

The invention belongs to the field of composite material manufacturing and relates to a method for repairing the R angle of a tooling.

Background technique

Repairing the R corner of composite material tooling has always been a major difficulty in tooling repairs. It is difficult to meet the requirements of use with conventional repair welding repairs, and the operation is difficult and the use is limited. After repairing, the machining cost is high and the effect is not good. , the surface porosity and flatness of the repaired tooling can not meet the acceptance requirements, so once the R corner is repaired, the basic tooling needs to be remanufactured. In order to improve this situation, an effective method is urgently needed to solve this problem. problem.

Contents of the invention

The technical problem to be solved by the present invention is to propose a convenient, economical and effective method for repairing missing flesh at the R corner, which can meet the requirements of tooling after repairing.

The technical scheme of the present invention is: a kind of method that is used for tooling R angle repair, and the repairing step is as follows:

The invention provides a method for repairing the R angle of the tooling, which is characterized in that it comprises the following steps:

1.1. Clean and roughen the R area to be repaired;

1.2. Mix the adhesive with the reinforcing material to form a mixed material;

1.3. Bond the mixed material to the R area to be repaired;

1.4. Scrape off the excess mixed material along the tooling to obtain the R angle required by the design, and then solidify the mixed material to form a supplementary area for the R angle.

Further, after step 4, the following steps are also included:

A thin layer of plastic tape or equivalent gel coat is covered on the surface of the R-corner patch area. Use thin plastic tape or equivalent gel coat. It can improve the surface effect and improve the surface finish of the product.

Further, the reinforcing material includes aluminum powder, carbon fiber powder or glass fiber powder. It can improve the service life of the rework tooling and enhance the rework effect.

Further, in step 4, the mixed material is scraped off with an R gauge or a rubber strip.

Further, in step 1, the R area to be repaired is polished to two closed angle areas at the same time. It is possible to limit and fix the supplementary area of the R angle.

The beneficial effects of the present invention are: the present invention is a method for repairing the R corner of the tooling. When the design of the R corner of the tooling is changed, it can quickly repair the lack of meat in the R corner, which can greatly improve the repairing cycle of the tooling and save the repair cost The test proves that the present invention can reduce the maintenance cost by more than 300%, and the production cycle can be shortened by more than 200%.

Description of drawings

Fig. 1 is the schematic diagram of a kind of embodiment of tooling R angle repairing method of the present invention;

Fig. 2 is the schematic diagram of another embodiment of tooling R angle repair in the present invention;

detailed description

The specific implementation manners of the present invention will be further described in detail below.

The invention provides a method for repairing the R angle of the tooling, the steps are as follows:

1.1 Clean the R area to be repaired with acetone or other organic solvents, and polish the R area to be repaired rough, and polish two closed corner areas at the same time, clean it with acetone and dry it before proceeding to the next step;

1.2 Use adhesive (high temperature structural adhesive) to mix with aluminum powder or other equivalent reinforcing materials such as glass fiber powder and carbon fiber powder;

1.3 Bond the prepared adhesive and reinforcing material to the R area to be repaired and the closed angle area previously polished;

1.4 Use R gauge or other special equivalent tools to scrape off the excess glue mixture along the tooling, or use a round hard object of the same size as the R angle to place in the repair area, make a vacuum bag to form the R angle, and trim After the R angle is fixed, it will be cured according to the selected adhesive curing conditions;

1.5 Treat the surface of the repaired area after curing, and use water sandpaper above 400# for grinding and polishing. In order to improve the service life of the repair tooling and enhance the repair effect, a thin layer of Teflon tape can be covered on the surface of the repair area or spray equivalent Epoxy resin gel coat;

Example 1

Referring to Figure 1, to repair the R angle shown in the fixed cover of a certain model, the repair steps are as follows:

1. Clean the R area to be repaired with acetone, and roughen the R area to be repaired, clean it with acetone and dry it before proceeding to the next step;

2. Use adhesive 2080 glue to mix with aluminum powder;

3. Place the prepared 2080 glue and aluminum powder in the R area to be repaired;

4. Use the Φ5R gauge to scrape off the excess glue mixture along the tooling;

5. After curing, treat the surface of the repaired area, and use 400# water sandpaper for grinding and polishing. In order to improve the service life of the repair tooling and enhance the repair effect, cover the surface of the repaired area with a thin layer of Teflon tape;

Example 2

To repair the R corner of a fixed plate of a certain type shown in Figure 2, the repair steps are as follows:

1. Use acetone to roughen the R area to be repaired with acetone, and polish two closed corner areas at the same time, clean it with acetone and dry it before proceeding to the next step;

2. Use adhesive EA9309.3 to mix with carbon fiber powder;

3. Stack the prepared EA9309.3 evenly mixed with carbon fiber powder in the R area to be repaired and the previously polished closed angle area;

4. Use a round hard object of the same size as the R angle to place in the repair area, make a vacuum bag to form the R angle, and then cure according to the curing conditions of EA9303.3 after trimming the R angle;

5. After curing, treat the surface of the repaired area, and use 400# water sandpaper for grinding and polishing. In order to improve the service life of the repair tooling and enhance the repair effect, a layer of epoxy resin gel coat is sprayed.

Claims (5)

1. A method for tooling R angle repair, is characterized in that, comprises the following steps: 1.1. Clean and roughen the R area to be repaired; 1.2. Mix the adhesive with the reinforcing material to form a mixed material; 1.3. Bond the mixed material to the R area to be repaired; 1.4. Scrape off the excess mixed material along the tooling to obtain the R angle required by the design, and then solidify the mixed material to form a supplementary area for the R angle. 2. The method for tooling R angle repair according to claim 1, characterized in that, after step 4, the following steps are also included: A thin layer of plastic tape or equivalent gel coat is covered on the surface of the R-corner patch area. 3. The method for repairing the R-angle of tooling according to claim 1, wherein the reinforcing material comprises aluminum powder, carbon fiber powder or glass fiber powder. 4. The method for repairing the R corner of the tooling according to claim 1, characterized in that in step 4, the mixed material is scraped off by using an R gauge or a rubber strip. 5. The method for repairing the R corner of tooling according to claim 1, characterized in that in step 1, the R region to be repaired is simultaneously ground to form two closed corner regions.