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Method for solving chemical milling deformation of domestic un-prestretched sheets

A pre-stretching and thinning technology, which is applied in the direction of furnace type, furnace, heat treatment furnace, etc., can solve problems such as chemical milling deformation

Inactive Publication Date: 2012-03-28
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for solving the deformation of domestically produced non-pre-stretched thin plates by chemical milling. The labor intensity of workers improves the manufacturing quality of large-scale skin parts

Method used

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Examples

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Embodiment Construction

[0016] Select a thin plate material with a wool size of 1200mm×4000mm×3.5mm, the material is 7B04T6B, and adopt a method to solve the deformation of the domestic non-pre-stretched thin plate by chemical milling, including the following steps:

[0017] 1) Degreasing the thin plate before quenching;

[0018] 2) Quenching the sheet according to the heat treatment system: put the aluminum sheet into the saltpeter tank with a crane, control the temperature within the range of 465°C~475°C, keep it warm for 15 minutes, and then place it in the cold water tank for rapid cooling within 15 seconds ;

[0019] 3) Under the new quenching state, horizontally stretch the sheet metal to eliminate the internal stress of the material. Use the VTL1000 stretching machine and the flat mold tire to carry out horizontal pre-stretching. The stretching deformation does not exceed 1%. After stretching, the The sheet is inspected on a standard platform, and the plane of the sheet is not greater than 2m...

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Abstract

The present invention relates to a method for solving chemical milling deformation of domestic un-prestretched sheets, which includes the following steps: 1, applying oil to a sheet before quenching; 2, quenching the sheet according to thermal treatment regulations; 3, in the state of quenching, horizontally stretching the sheet to eliminate the internal stress of materials; and 4, finishing subsequent formation and chemical milling procedures according to the drawing. The method can eliminate the internal stress of process un-prestretched sheets, solve the problem of serious chemical milling deformation, reduce the labor intensity of workers and improve the making quality of large-sized enveloped parts.

Description

technical field [0001] The invention relates to a method for solving the deformation of the domestic non-pre-stretched thin plate by chemical milling, which is used to solve the problem of serious deformation of the domestic non-pre-stretched aluminum thin plate by chemical milling. Background technique [0002] At present, my country's metallurgical industry does not have the ability to produce pre-stretched thin aluminum plates with a thickness of less than 10mm. The aluminum plates after leaving the factory have large internal stress and poor flatness due to the lack of pre-stretched treatment. The internal stress is further released during the cutting process, resulting in serious distortion of the parts, which can only be scrapped. The conventional method of flattening the material is to use rollers to manually pull or roll the bending machine to flatten the raw material to eliminate internal stress, and then to manually trim the parts of the chemical milling. After usin...

Claims

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Application Information

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IPC IPC(8): C21D9/46C22F1/04C23F1/04
Inventor 李丁
Owner SHENYANG AIRCRAFT CORP
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