CN113019845A

CN113019845A - Gluing process

Info

Publication number: CN113019845A
Application number: CN202110286353.2A
Authority: CN
Inventors: 孟少轩; 程文静; 张义德; 许立君; 蒲海龙; 郭旭东; 陈媛媛; 马清妍
Original assignee: AECC Aviation Power Co Ltd
Current assignee: AECC Aviation Power Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-06-25

Abstract

The invention discloses a gluing process, which comprises the following steps: covering a covering layer on the edge of the contact area of the tenon and the blade disc of the blade; coating glue in the area surrounded by the covering layer, and flattening the surface coated with the glue; and after the glued surface is leveled, the glue is solidified, the covering layer is removed, and the gluing process is finished. The invention can well control the processing size of the adhesive layer and has lower requirements on processing methods of operators.

Description

Gluing process

Technical Field

The invention belongs to the technology of machining blades of an aero-engine compressor, relates to an improvement on a machining method of blades of an aero-engine compressor, and particularly relates to a gluing process.

Background

When the tenon of the rotor blade of the engine compressor is connected with the blade disc, glue is needed to be coated on the position, in contact with the blade disc, of the tenon. At present, the rotor blade is coated with glue in China mainly by manual direct spraying, the surface quality of the sprayed glue is poor, the processing size of a glue layer (such as a glue coating area and the thickness of the glue layer) is unstable during spraying, and the requirement on the processing method of an operator is extremely high.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a gluing process, which can well control the processing size of a glue layer and has lower requirements on processing methods of operators.

The technical scheme adopted by the invention is as follows:

a gluing process comprises the following steps:

covering a covering layer on the edge of the contact area of the tenon and the blade disc of the blade;

coating glue in the area surrounded by the covering layer, and flattening the surface coated with the glue;

and after the glued surface is leveled, the glue is solidified, the covering layer is removed, and the gluing process is finished.

Preferably, the glue is smoothed to be flush with the cover layer when the glued surface is smoothed.

Preferably, the glue is smoothed to be flush with the cover layer using a blade when the surface to which the glue is applied is smoothed.

Preferably, the glue curing process comprises primary curing and complete curing, the covering layer is removed after the glue is primarily cured, and then the glue is completely cured to form the glue layer.

Preferably, after the glue is completely cured, checking whether the glue layer has a degumming phenomenon, and if the glue layer has no degumming phenomenon, finishing the gluing process; if the degumming phenomenon exists, removing the glue layer at the degumming part, and then coating the glue again to form the glue layer until the degumming phenomenon does not exist.

Preferably, the process of removing the formed glue layer is performed by using a clamping method.

Preferably, the time for the primary curing of the glue is 1 to 2 hours after the surface to be coated is leveled, and after 18 to 30 hours after the cover layer is removed, the glue is completely cured.

Preferably, the covering layer is made of adhesive tape, and the adhesive tape is adhered to the edge of the contact area of the tenon and the blade disc of the blade.

Preferably, when bonding the adhesive tape, the number of layers of the adhesive tape is determined according to the thickness of the applied adhesive, and the thickness of each layer of the adhesive tape is not larger than the thickness deviation of the adhesive.

Preferably, the tenon comprises a tenon tooth and a flange plate, the tenon tooth is arranged on the flange plate, the contact area of the tenon and the blade disc comprises a blade disc contact area on the tenon tooth and a blade disc contact area on the flange plate, a covering layer covers the edge of the contact area of the flange plate and the blade disc on the tenon head, and a covering layer covers the edge of the contact area of the tenon tooth and the blade disc on the tenon tooth.

The invention has the beneficial effects that:

in the gluing process, the covering layer covers the edge of the contact area between the tenon of the blade and the blade disc, so that the area to be glued can be determined, an operator can be prevented from coating glue on the area which does not need to be glued in the subsequent gluing process, and compared with spraying glue, the gluing position is easy to grasp; simultaneously, the thickness of the coated glue can be controlled by controlling the thickness of the covering layer and the leveling process, the leveling process has low requirements on processing methods of operators, and the surface quality of the glue layer can be improved by leveling.

Further, after the glue is primarily cured, the covering layer is removed, and on one hand, the glue is not firmly bonded with the covering layer, so that the covering layer is easy to remove; on the other hand, in the process of removing the covering layer, the covering layer is not easy to lift the adhesive tape adhered with the tenon, and the phenomenon of degumming caused by removing the covering layer is prevented.

Furthermore, the covering layer adopts the adhesive tape, the covering process is easy to operate, the cost is low, and the thickness is easy to control.

Drawings

FIG. 1 is a schematic diagram of a gluing position and tape adhesion when the gluing process is applied to a certain type of engine compressor rotor blade structure;

FIG. 2 is a schematic view of FIG. 1 taken along line B;

fig. 3 is a schematic view of fig. 1 taken along direction a.

In the figure, 1-edge plate adhesive tape, 2-tenon adhesive tape, 3-tenon, 4-edge plate adhesive tape, 5-tenon adhesive tape, 6-edge plate and 7-tenon.

Detailed Description

The invention is further illustrated by the figures and examples.

Referring to fig. 1 to 3, the gluing process of the present invention comprises the steps of:

step 1, cutting the adhesive tape, namely cutting the adhesive tape into a strip shape according to the size of a part to be coated with adhesive, wherein the width of the adhesive tape does not meet the requirement of enforcement, but meets the requirement of actual use;

step 2, preparing rubber, and filling a large barrel of rubber into the medical needle tube for later use;

step 3, determining the number of layers of the adhesive tape to be used according to the thickness (design requirement) of the final adhesive tape, and sticking the adhesive tape to the edge of the appointed part of the blade according to the position size of the adhesive tape (the appointed part is the part of the blade tenon in contact with the blade disc and is determined by a design drawing);

step 4, gluing by using a needle tube, and uniformly extruding a glue material between the two adhesive tapes;

step 5, scraping the glue stock to be level with the adhesive tape by using a blade;

step 6, after 1-2 hours, carefully removing the adhesive tape for protection and removing the redundant adhesive material;

step 7, placing the leaves for 18-30 hours;

and 8, checking the blade after the step 7 is finished, checking whether the glue coating part has a degumming phenomenon, removing the glue layer by clamping if the glue coating part has the degumming phenomenon, and performing repairing coating according to the steps 1-6 again.

Examples

Referring to fig. 1-3, the structure, the gluing position and the tape gluing of the secondary rotor blade of a certain type of engine compressor are schematically shown, and the main steps of gluing the tenon of the rotor blade of the type comprise:

step 1, cutting the adhesive tape, wherein a specially-assigned person cuts the adhesive tape according to the size of a part to be coated with adhesive of a rotating blade tenon, and the cutting width is 2 +/-0.1 mm;

step 3, determining the number of adhesive tape layers (3 layers) to be used according to the final adhesive tape thickness (1.5 +/-0.2 mm), and pasting the adhesive tape to the edge of the appointed part of the blade by an organization specialist according to the positioning size of the adhesive tape;

step 6, carefully removing the protective adhesive tape after one hour, and removing redundant adhesive material;

step 7, placing the leaves for 24 hours;

and 8, checking whether the glue coating part of the tenon of the blade placed for 24 hours has a degumming phenomenon or not, and finishing glue coating.

The gluing process of the invention comprises the following steps: 1) the processing technology is simple, the processing steps are few, the processing period is short, and the processing efficiency is high; 2) the position size of the sizing material is limited through the adhesive tape, so that the position precision is ensured; 3) the glue material scraped by the blade has strong binding force with the tenon and is not easy to fall off. The invention can ensure the processing quality of the blade, improve the processing efficiency and shorten the processing period.

Claims

1. A gluing process is characterized by comprising the following steps:

covering a covering layer on the edge of the contact area of the tenon (3) of the blade and the blade disc;

2. A glue spreading process according to claim 1 wherein the spread surface is smoothed to be flush with the cover layer.

3. A glue spreading process according to claim 2 wherein the spread surface is smoothed by a blade to be flush with the cover layer.

4. A glue spreading process according to claim 1 wherein the glue curing process comprises a preliminary curing and a full curing, the cover layer being removed after the preliminary curing of the glue, and the glue being allowed to fully cure to form the glue layer.

5. A gluing process according to claim 4, wherein after the glue is completely cured, the glue layer is checked for the presence of a degumming phenomenon, and if the glue layer is not degummed, the gluing process is completed; if the degumming phenomenon exists, removing the glue layer at the degumming part, and then coating the glue again to form the glue layer until the degumming phenomenon does not exist.

6. A gluing process according to claim 5, wherein the removal of the glue layer formed is carried out by means of a clinch.

7. A gluing process according to any one of claims 4 to 6, wherein the initial setting of the glue is 1 to 2 hours after the surface to be glued has been smoothed, and the glue is fully set 18 to 30 hours after the cover layer has been removed.

8. A gluing process according to any one of claims 1 to 6, characterised in that the coating is applied by means of an adhesive tape, which adheres to the edge of the blade where the tenon (3) contacts the blisk.

9. A gluing process according to claim 8, wherein the number of layers of tape is determined according to the thickness of the glue applied when gluing the tape, each layer of tape having a thickness not greater than the deviation of the thickness of the glue.

10. A gluing process according to claim 1, wherein the tenon (3) comprises a tenon tooth (7) and a flange plate (6), the tenon tooth (7) is arranged on the flange plate (6), the contact area of the tenon (3) and the blade disc comprises the blade disc contact area on the tenon tooth (7) and the blade disc contact area on the flange plate (6), the edge of the flange plate (6) and the blade disc contact area on the tenon (3) is covered with a covering layer, and the edge of the tenon tooth (7) and the blade disc contact area on the tenon tooth (7) is covered with a covering layer.