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Forming method for cylindrical shell piece with flanged holes

A technology of flanging holes and parts, which is applied in the field of sheet metal forming, can solve the problems of difficult part forming, unloading, poor surface quality, etc., and achieve the effects of reducing forming tooling, ensuring product quality, and simplifying the forming process

Active Publication Date: 2014-03-19
XIAN AIRCRAFT IND GROUP
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  • Abstract
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Problems solved by technology

[0009] The invention discloses a method for forming a cylindrical shell part with flanging holes, which is used to solve the problems of difficult part forming, difficult unloading and poor surface quality, improve the production efficiency and product quality of the part, and meet the assembly requirements of the fuel tank

Method used

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  • Forming method for cylindrical shell piece with flanged holes
  • Forming method for cylindrical shell piece with flanged holes
  • Forming method for cylindrical shell piece with flanged holes

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Embodiment Construction

[0024] The following is an example of a typical cylindrical shell part with flanged holes.

[0025] See attached picture, figure 1 It is a schematic diagram of the cylindrical multi-mouth shell parts. According to the structural design of the aircraft, the cylindrical shell parts are made of anti-rust aluminum sheets, which are welded and assembled with multiple parts such as the tank cover, tank bottom, and conduits to form a fuel tank assembly. The part has a butt weld 4 in the cylinder height direction, the cylinder wall has reinforcing ribs 2 along the circumferential direction, and there are special circular first flanging holes 5 with different positions and sizes along the normal direction of the cylinder rotation axis. Flange hole 6, the 3rd flange hole 7 (as figure 2 Shown), used for the butt joint of fuel tank and oil pipe, there are flanges 3 at both ends of the cylinder and at the edge of the weld. For the forming of this part, the curling of the cylinder, the ...

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Abstract

The invention relates to a forming method for a cylindrical shell piece with flanged holes, which is manufactured and invented to aim at a fuel tank of an airplane. The forming method for the cylindrical shell piece with flanged holes comprises the steps of paving and pasting a rubber pad on the outer side of an element to form a combined body, forming the combined body by rolling and bending, correcting the shape of the element and the flanged holes through a detachable combined type tire, and resolving the combined type tire after the correction. The forming method avoids the interference phenomenon of the element and a die during the disassembly, thus the element can not transform after being disassembled, and the unnecessary correcting processes are reduced.

Description

technical field [0001] The invention relates to the technical field of sheet metal forming, and mainly aims at a forming method of sheet metal parts such as aircraft fuel tank shells. Background technique [0002] In aircraft parts, cylindrical shell parts with flanging holes are often used in various types of aircraft fuel tank shells. These parts are welded and assembled with multiple parts such as tank covers, tank bottoms, and aircraft conduits to form fuel tank assemblies for storing lubricating oil. , hydraulic oil and other liquid media, in the aircraft fuel tank assembly, the cylindrical shell parts with flanging holes are very typical. [0003] The structure of this kind of parts is complicated, and the previous forming process method is: first, manually form the oval flanging hole → hydraulically form the reinforcing rib, bend the edge around it → manually gradually curl the part into a cylinder → manually correct the flanging hole on the forming die to make it Pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D21/00
Inventor 章文亮曹锋艾立波
Owner XIAN AIRCRAFT IND GROUP
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