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Method for continuously and unevenly compressing and forming three-dimensional curved surface

A technology of uniform compression and three-dimensional curved surface, which is applied in storage devices, metal processing equipment, feeding devices, etc., can solve the problems that the processing technology cannot meet the actual requirements, and achieve the effect of small springback, simple equipment structure and good forming effect

Inactive Publication Date: 2012-10-17
JILIN UNIV
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  • Abstract
  • Description
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Problems solved by technology

Since the traditional processing technology cannot meet the actual requirements, the processing of single-piece and small-batch curved surface parts has become a technical bottleneck in many fields.

Method used

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  • Method for continuously and unevenly compressing and forming three-dimensional curved surface
  • Method for continuously and unevenly compressing and forming three-dimensional curved surface
  • Method for continuously and unevenly compressing and forming three-dimensional curved surface

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Embodiment Construction

[0031] The specific content and working process of the present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0032] The continuous forming of the curved surface is mainly realized by the paired upper forming tool 1a and lower forming tool 1b and the feeding motion of the sheet. The upper forming tool 1a and the lower forming tool 1b are elongated, can be bent with a small deflection, and are arranged perpendicular to the sheet material feeding direction (transverse direction). After shape adjustment, curved gaps 2a, 2b are formed between the upper forming tool 1a and the lower forming tool 1b. When the sheet passes through the forming tool, a cavity that causes the sheet to compress and deform along the thickness direction is formed at the gap between the upper and lower forming tools. The width of the cavity is non-uniformly distributed along the length direction (transverse direction) of the forming tool. ...

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Abstract

The invention provides a method for continuously and unevenly compressing and forming a three-dimensional curved surface by using a sheet metal, belongs to the field of metal plastic processing and is especially suitable for the quick forming of a double-curvature three-dimensional curved surface part. The method is characterized in that the continuous forming of the curved surface is realized by paired upper and lower forming tools and the feeding motion of the sheet metal. When the sheet metal continuously passes by the forming tools, a plastic deforming area with a cross section having a curved shape and a thickness gradually reducing along the feeding direction of the sheet metal is formed at a gap of the upper and lower forming tools. The sheet metal is subjected to horizontal bending deformation and uneven compressing deformation along thickness direction in the deforming area; the uneven extension volume of the sheet metal along the horizontal direction is caused by the uneven compressing, so that an additional longitudinal bending moment is formed on the bent cross section and the sheet metal is longitudinally bent; and following the longitudinal continuous feeding of the sheet metal, a double-curvature three-dimensional curved surface is formed under the combined action of the horizontal and longitudinal bending deformation.

Description

technical field [0001] The invention relates to a sheet material forming method, which belongs to the field of metal plastic processing, and is especially suitable for rapid forming of hyperbolic three-dimensional curved surface parts. Background technique [0002] Three-dimensional curved surface parts are widely used in manufacturing fields such as airplanes, ships, high-speed trains, and chemical containers. The demand for hyperbolic curved surfaces in modern architectural structures and urban sculptures is also increasing. These surface parts are usually produced in a single piece and in small batches, and the shapes of the parts are various, and the number of parts of each shape is not much. The traditional mold forming technology is suitable for mass production of parts, but when used for small batch processing of curved surface parts, the mold cost is too high, so it is no longer applicable. Since the traditional processing technology cannot meet the actual requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D31/00B21D43/09
Inventor 蔡中义李明哲王蜜李湘吉
Owner JILIN UNIV
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