Sheet bar reciprocating type forming method based on force transferring by viscoelastic medium

A viscoelastic and reciprocating technology, which is applied in the field of sheet metal forming, can solve the problems of forming difficult parts and not being able to use the forming properties of materials more effectively, and achieve the effects of good product quality, increased limit forming degree, and good application prospects

Inactive Publication Date: 2005-06-29
CHONGQING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The above-mentioned process only uses viscous medium instead of liquid for force transmission, but it does not improve from the perspective of forming proc...

Method used

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  • Sheet bar reciprocating type forming method based on force transferring by viscoelastic medium
  • Sheet bar reciprocating type forming method based on force transferring by viscoelastic medium
  • Sheet bar reciprocating type forming method based on force transferring by viscoelastic medium

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Experimental program
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Embodiment Construction

[0023] The forming device used in this method is as figure 1 As shown, it consists of two upper and lower cavities 2 and 6, upper and lower pistons 1 and 7.

[0024] The following to produce Figure 5 Using the final product shown as an example, the operation of the method is described in detail:

[0025] 1. See figure 1 Place the blank 4 to be formed between the upper and lower cavities 2 and 6 of the forming device, install the punch 5 on the top of the piston 7 of the lower cavity 6, and fill the upper and lower cavities with viscoelastic medium alkyd resin 3 ;

[0026] 2. Push the lower piston 7 where the punch is located by external power to make it go up, and the pressure in the lower chamber 6 increases, causing the sheet 4 to deform upwards, and at the same time, the upper piston 1 moves upward under pressure to achieve the purpose of pressure relief, such as figure 2 ;

[0027] 3. When the deformation reaches the pre-forming requirements predicted by the process...

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Abstract

The invention is a type way based on the flexibility plate. It uses the flexibility material as the medium, utilizing the shape equipment of up and down cavities and pistons put the material between the two cavities, bulge film is fixed on the piston top, by the moving of piston, the material type first. Then type last by opposite direction, and we get the product. The type way can increase the material transform degree and the product transform limit, and decrease the steps to produce and get the high quality product, so it has very good foreground to apply.

Description

technical field [0001] The invention belongs to sheet material forming technology, in particular to soft mold or moldless flexible forming methods for sheet materials, and is a sheet material reciprocating forming method based on viscoelastic medium force transmission. Background technique [0002] At present, the soft mold or moldless flexible forming methods at home and abroad mainly include: [0003] ① Soft molding process of polyurethane rubber. The disadvantage is that the deformation degree of the elastic body itself limits the forming of complex parts, the molding performance is poor, the pressure control cannot be easily realized, and the pressure distribution is extremely uneven. As well as the lack of reasonable envelope for parts, it is difficult to form complex parts with deep drop. [0004] ②Hydraulic bulging and rubber hydroforming. The pressure transmission medium of hydroforming is usually oil, emulsion or water, etc., and the common feature of these media...

Claims

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Application Information

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IPC IPC(8): B21D26/021
Inventor 邓明胡建军许洪斌
Owner CHONGQING UNIV OF TECH
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