Gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin

A large-scale, aluminum alloy technology, applied in the field of precision sheet metal processing, can solve the problems of poor integrity of parts, high cost, difficult control of shape accuracy, etc., achieve high dimensional accuracy and surface quality of parts, eliminate residual stress, and mold manufacturing accuracy. Easy-to-control effects

Active Publication Date: 2013-01-16
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0003] The technical solution of the present invention is to provide an air-inflation forming method for aluminum alloy large-size thin-walled spherical skin, which can overcome the shortcomings of po

Method used

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  • Gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin
  • Gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin
  • Gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin

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specific Embodiment approach

[0033] The specific implementation method is carried out according to the following process steps: the first step is to increase the process allowance: determine the process allowance, the size of the process blocking plate and the process flange according to the size of the ball segment skin, and determine the welding position. The second step of blanking: prepare the fan-shaped plate of the spherical segment skin. The process allowance of the large end is to increase 20mm in the height direction, and the process allowance of the small end is to increase 25mm in the height direction. Calculate the fan-shaped plate after increasing the process allowance. Unfolded length, see figure 2 , Use laser cutting or CNC punching method to place a single blank; similarly, place a single blank for the process blocking plate and process flange; remove the slag and deburr the blank. The third step is pre-forming: use a general-purpose circular machine to circle the fan-shaped sheet of the ...

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Abstract

The invention discloses a gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin. The gas bulging forming method includes the steps: 1) feeding according to the size of the ball-segment skin so as to obtain a sector plate with process allowance; 2) welding the sector plate for the ball-segment skin into a conical barrel; 3) welding a process blind to a small end of the conical barrel, and welding a process flange to a large end of the conical barrel so as to form a ball-segment skin billet; 4) placing the ball-segment skin billet into an inner cavity of a heated gas bulging forming die, closing an upper cover of the gas bulging forming die, and forming a closed cavity between the ball-segment skin billet and the upper cover; 5) feeding compressed gas into the closed cavity until the ball-segment skin billet is attached to the wall of the inner cavity of the gas bulging forming die so that the ball-segment skin is formed; and 6) cutting off the process allowance on the formed ball-segment skin according to the size requirements of the ball-segment skin so that a finished product is obtained. The ball-segment skin prepared by the method only has one welding seam so as to be good in integrality, size precision and surface quality of parts are high, and cost for the die is low.

Description

technical field [0001] The invention belongs to the technical field of precision sheet metal processing, and relates to an inflatable forming method for aluminum alloy large-size thin-walled spherical segment skins, which is suitable for forming various large-sized thin-walled aluminum alloy spherical segment skin parts. Background technique [0002] Due to its excellent performance, aluminum alloys are widely used in aerospace, rail transit, weaponry and other fields. In the field of aerospace, the integration and lightweight of large-scale skin shell parts and components are getting higher and higher, and the requirements for manufacturing precision are getting higher and higher. In the field of aluminum alloy sheet metal forming, cold stamping is mostly used in industry at present. Compared with steel plates, aluminum alloy sheet metal formed at room temperature has the disadvantages of large rebound and low plasticity, so forming large-sized and complex aluminum alloy sh...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21D26/02
Inventor 李保永秦英史科孙燚刘洋李强
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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