CN216399151U

CN216399151U - Coating removing tool

Info

Publication number: CN216399151U
Application number: CN202122727939.6U
Authority: CN
Inventors: 易朝辉; 胡强; 付学应; 吴杰; 颜娟娟; 黎明; 胡敏; 张延晶; 闵伟
Original assignee: Jiangxi Hongdu Commercial Aircraft Co ltd
Current assignee: Jiangxi Hongdu Commercial Aircraft Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-04-29
Anticipated expiration: 2031-11-09

Abstract

The utility model belongs to the technical field of aircraft assembly bonding, and particularly relates to a coating removing tool for a bonding surface when a bonding fastener is bonded with a structural member. The grinding disc comprises a grinding disc, a three-jaw supporting piece, a bushing and a bearing; the bearing is cold-pressed in the inner hole of the bushing, and the end surface of the bearing is flush with the upper surface of the bushing; the bushing is in threaded connection with the three-jaw supporting piece; cold pressing a connecting rod of a polishing disc in an inner hole of the bearing; the grinding sheet is positioned below the grinding disc. The coating removing tool disclosed by the utility model is simple in structure and convenient to operate, solves the problems of low manual polishing efficiency, rough polishing surface, difficulty in controlling polishing thickness and the like during coating removing, and can generate certain economic benefits in the stage of aircraft batch production. The method has better practicability, is easy to popularize and apply, and has higher development and application values in the professional field.

Description

Coating removing tool

Technical Field

The utility model belongs to the technical field of aircraft assembly bonding, and particularly relates to a coating removing tool for a bonding surface when a bonding fastener is bonded with a structural member.

Background

The main connection forms in the aircraft assembly include the connection and fixation of structures such as riveting, screw connection and the like and the connection forms such as glue joint, electric lap joint and the like. Aiming at the technical requirements of glue joint and electric lap joint of CEAD series standard parts and structure binding surfaces, the binding surfaces are kept dry and free of oil stains, dust or other pollutants, and coatings between the binding surfaces need to be polished and removed before installation. According to the technical specification CPS2133 of the installation of bonding fasteners of the domestic large airliner, CPM923/CPM5695-6 alumina waterproof abrasive paper is used for wiping a polishing area, small circle movement is carried out until metal is exposed, the thickness of a removed surface layer cannot exceed 0.13mm, the precision is high, and the construction difficulty is high.

At present, the binding face mode of polishing is polished for manual abrasive paper before the cementing fastener installation, and intensity of labour is big, and the quality of polishing is also not high and difficult assurance thickness requirement of polishing, need go out the scope of polishing with sticky tape paper circle when polishing to pay close attention to the condition of polishing constantly at the in-process of polishing, the roughness also is difficult to be guaranteed, produces certain influence to the quality of bonding.

In summary, when the CEAD standard components are glued, how to design a set of coating removal tool with simple structure and convenient use is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coating removing tool with simple structure and convenient use, so as to solve the problems described in the technical background, meet the requirement of the adhesion force of the CEAD series standard parts of the airplane after being glued and improve the assembly quality.

In order to achieve the purpose, the utility model provides the following technical scheme: a coating removal tool includes a sanding disc, a three-jaw support, a bushing, and a bearing;

the bearing is cold-pressed in the inner hole of the bushing, and the end surface of the bearing is flush with the upper surface of the bushing;

the bushing is in threaded connection with the three-jaw supporting piece;

cold pressing a connecting rod of a polishing disc in an inner hole of the bearing;

the grinding sheet is positioned below the grinding disc.

Furthermore, the polishing sheet, the three-jaw supporting piece and the polishing area of the outer surface of the part are positioned on the same surface.

Further, the three-jaw support is fixed with the bushing by a screw.

Furthermore, the connecting rod of the polishing disc is in interference fit with the inner hole of the bearing.

Further, the bush and the outer ring of the bearing are in interference fit.

During the use, install this device in the air drill, behind the tight polishing set pull rod of air drill clamp, use the part surface of polishing as the benchmark, will polish piece and three-jaw support piece and the laminating of part surface of polishing, rotatory three-jaw support piece is to polishing piece protrusion support piece 0.1mm to pinned support piece and bush with the screw, in case not hard up, then place in the bonding surface, control certain rotational speed and polish the removal coating to the bonding surface, guarantee the machining precision requirement through three-jaw support piece and the laminating of product surface.

The installation process of the coating removal tool comprises the following steps: guarantee bearing end face and bush upper surface flush in the bush hole with bearing cold pressing earlier, then through bush external screw thread screw in support piece, guarantee polishing piece and support piece three-jaw in same surface, record the scale numerical value that the scale mark aligns on the bush and the support piece in bearing hole cold pressing with the polishing dish connecting rod. As the thread pitch is 0.5mm, after the support piece is rotated by 72 degrees, the support piece is ensured to rise by 0.1mm, then the support piece is pinned by a screw, the pneumatic drill is started to polish the outer surface gluing area of the part until the three-jaw support piece is attached to the surface of a product, and the polishing operation is finished

Utility model's beneficial effect: the coating removing tool disclosed by the utility model is simple in structure and convenient to operate, solves the problems of low manual polishing efficiency, rough polishing surface, difficulty in controlling polishing thickness and the like during coating removing, and can generate certain economic benefits in the stage of aircraft batch production. The method has better practicability, is easy to popularize and apply, and has higher development and application values in the professional field.

Drawings

FIG. 1 is a schematic view of the coating removal tool assembly of the present invention;

FIG. 2 is a schematic cross-sectional view of a coating removal tool of the present invention;

FIG. 3 is a schematic view of the coating removal tool of the present invention in use.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A coating removes the tool, it includes polishing disc 1, polishes slice 2, three-jaw support 3, bush 4 and bearing 5;

the bearing 5 is cold-pressed in the inner hole of the bush 4, and the end surface of the bearing 5 is flush with the upper surface of the bush 4;

the bushing 4 is in threaded connection with the three-jaw support 3;

cold pressing the connecting rod of the polishing disc 1 in an inner hole of the bearing 5;

the sanding sheet 2 is located below the sanding disc 1.

Further, the polishing sheet 2 and the three-jaw support 3 are positioned on the same surface as the polishing area of the outer surface of the part.

Further, the three-jaw support 3 is fixed to the bushing 4 by a screw 6.

Further, the connecting rod of the polishing disc 1 is in interference fit with the inner hole of the bearing 5.

Further, the bush 4 and the outer ring of the bearing 5 are in interference fit.

The installation process of the coating removal tool comprises the following steps: the bearing 5 is firstly cold-pressed in an inner hole of the bushing 4 to ensure that the end face of the bearing is flush with the upper surface of the bushing, the three-jaw support 3 is screwed in through the external thread of the bushing 4, the pull rod of the polishing disc 1 is cold-pressed in the inner hole of the bearing 5 to ensure that the polishing disc 2, the three jaws of the support 3 and the outer surface polishing area of the part are positioned on the same surface, and the scale numerical value aligned with the scale mark on the support on the bushing is recorded. After rotating the support by 72 °, it is ensured that the support rises by 0.1mm and is then pinned by the screw 6. And starting the pneumatic drill to polish the outer surface gluing area of the part until the three-jaw support piece 3 is attached to the surface of the product, and finishing the polishing operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A coating removal tool, characterized by: the grinding disc comprises a grinding disc (1), a grinding sheet (2), a three-jaw supporting piece (3), a bushing (4) and a bearing (5);

the bearing (5) is cold-pressed in the inner hole of the bushing (4), and the end surface of the bearing (5) is flush with the upper surface of the bushing (4);

the bushing (4) is in threaded connection with the three-jaw support (3);

cold pressing a connecting rod of the polishing disc (1) in an inner hole of the bearing (5);

the polishing disc (2) is positioned below the polishing disc (1).

2. The coating-removal tool of claim 1, wherein: the polishing piece (2) and the three-jaw supporting piece (3) are positioned on the same surface with the polishing area of the outer surface of the part.

3. The coating-removal tool of claim 1, wherein: the three-jaw supporting piece (3) is fixed with the bush (4) through a screw (6).

4. The coating-removal tool of claim 1, wherein: the connecting rod of the polishing disc (1) is in interference fit with the inner hole of the bearing (5).

5. The coating-removal tool of claim 1, wherein: the bushing (4) is in interference fit with the outer ring of the bearing (5).