Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces

A technology of skinning and parts, applied in the field of aviation technology, can solve the problems of increased production cost, high cost, and small pre-stretched plate specifications, and achieve the effects of reducing hardening performance, good plasticity, and improving forming quality

Active Publication Date: 2013-09-04
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specifications of incoming pre-stretched panels for the skin are small, especially the cost is high. For small batches of products, ordering a large number of pre-stretched panels will double the production cost

Method used

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  • Forming method capable of guaranteeing quality of chemically-milled thick skin workpieces

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Experimental program
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Effect test

Embodiment Construction

[0016] Such as figure 1 As shown, a forming method to ensure the quality of chemically milled thick skin parts includes the following specific steps:

[0017] (1) Choose an aluminum alloy non-pre-stretched plate or a titanium alloy non-pre-stretched plate to make the skin blank. During production, it is necessary to reserve jaw clamping margins in the two jaw directions 2 of the skin blank 1 according to the size of the part. The clamping margin is specifically: the width is 45mm, and the length is equal to the length of the skin blank 1;

[0018] (2) Prepare 4 craft aluminum strips 3. The craft aluminum strip 3 adopts LY12. Since the size of the craft aluminum strip needs to be consistent with the clamping margin reserved in the jaw direction, the width of the craft aluminum strip 3 is 45mm , the thickness is 1.2mm, and the length is also equal to the length of the skin blank 1;

[0019] (3) If the skin blank 1 is an aluminum alloy non-pre-stretched plate, use phosphoric ac...

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Abstract

The invention provides a forming method capable of guaranteeing quality of chemically-milled thick skin workpieces. The method specifically includes the steps: selecting a non-prestretched plate for producing a skin blank, and reserving jaw clamping allowances in two jaw directions of the skin blank; preparing four process aluminum rods with sizes equal to the reserved jaw clamping allowances in the jaw directions; adhesively bonding the process aluminum rods with the skin blank; adopting a skin stretching machine for prestretching the skin blank to enable the skin blank to form a pre-stretched plate with low internal stress; in a part forming process, adopting an aluminum rod bonding method for guaranteeing clamping force of a jaw of the skin stretching machine on the blank, performing chemical milling after forming, and cutting off the process aluminum rods and the jaw clamping allowances reserved in the jaw directions to form a skin workpiece; and finishing, painting and inspecting. The blank is pre-stretched to enable the internal stress of a skin material to be decreased, so that deformation of chemical milling is reduced, plasticity is excellent during forming, and forming quality of the chemically-milled thick skin workpieces is guaranteed.

Description

technical field [0001] The invention relates to a forming method for ensuring the quality of chemically milled thick skin parts, and belongs to the technical field of aviation technology. Background technique [0002] Chemical milling thick skin parts refer to skin parts with a part thickness of more than 3mm and with chemical milling to reduce the step structure. This type of skin product generally has a hyperbolic theoretical shape, its outer dimension is large, and there is a thinned chemical milling area on the inside of the skin. [0003] When the above-mentioned chemical milling thick skin parts are stretched and formed, due to the large thickness of the material, the blank is not easy to be filmed, and the manual trimming with large rigidity and large deformation cannot meet the general inspection specifications for parts, especially after the parts are processed by chemical milling. Serious beyond repair. [0004] As we all know, the use of pre-stretched plates can...

Claims

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Application Information

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IPC IPC(8): B21D22/22B23P15/00C23F1/04
Inventor 王玲毕野
Owner SHENYANG AIRCRAFT CORP
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