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Forming die and method for special-shaped curved surface structural part

A technology for forming molds and special-shaped curved surfaces, which is applied in the field of precision sheet metal processing. It can solve problems such as heavy workload, easy cracks in shape correction, and inability to form products with non-uniform wall thickness at one time, so as to prevent stacking, ensure product quality, Effect of reducing the risk of wrinkling and cracking

Active Publication Date: 2021-03-12
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Cold stamping processing equipment and processing technology can only process products with equal wall thickness, and products with non-equal wall thickness cannot be formed at one time, and only tailor-welded after segmental forming can be used craft
[0004] There are the following disadvantages in adopting the process of segmented forming and then tailor welding: First, the process of segmented forming and then tailor welding requires manual repair, shape correction and grinding, and the workload is large , leading to extremely low product processing efficiency
Secondly, there are many welding seams, large welding seam deformation, and cracks are easy to occur in the shape correction, resulting in a low pass rate of the product at one time
Thirdly, the surface quality of the products processed by tailor welding process is poor
Finally, due to the presence of welds, the mechanical properties of the parts will inevitably be reduced

Method used

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  • Forming die and method for special-shaped curved surface structural part
  • Forming die and method for special-shaped curved surface structural part
  • Forming die and method for special-shaped curved surface structural part

Examples

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Effect test

Embodiment 1

[0072] A specific embodiment of the present invention discloses a forming device, which is used for one-time forming of structural parts with non-uniform wall thickness and special-shaped curved surfaces.

[0073] Non-equal wall thickness special-shaped curved surface structural parts include front section 8, shrinkage section 9 and tail section 10; the product material is: 1Cr18Ni9Ti stainless steel, the material thickness is 1mm and 2mm respectively, that is, the front section and shrinkage section are 1mm, the rear section is 2mm, and the product length × width × height is 1100mm × 130mm × 100mm, the product model after forming is as follows Figure 7 shown. The bottom surface of the formed special-shaped curved surface structure is inclined upward from the tail section to the front section, and the angle between the bottom surface and the horizontal plane is β, such as Figure 8 (a) and Figure 8 (b) shown.

[0074] According to the traditional design idea, in order to ...

Embodiment 2

[0100] Another specific embodiment of the present invention discloses a method for forming a structural member with non-uniform wall thickness and special-shaped curved surface. The forming die of Embodiment 1 is used for one-time forming of the structural member with non-uniform wall thickness and special-shaped curved surface.

[0101] Figure 8 (a) is a schematic diagram of the target product formed by a traditional mold, Figure 8 (b) is a schematic diagram of the target product formed by the forming die of the present invention. Figure 8 (a) and Figure 8 The products of (b) are identical, but superficially Figure 8 (a) The upper surface of the product is parallel to the horizontal plane, and the lower surface is inclined upward by an angle β; and Figure 8 (b) The lower surface of the product is parallel to the horizontal plane, and the upper surface is inclined downward at a certain angle.

[0102] The forming process of the product is described in detail below. ...

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Abstract

The invention relates to a forming die and method for a special-shaped curved surface structural part, and belongs to precision sheet metal machining, and the problems that in the prior art, a special-shaped curved surface product with different wall thicknesses cannot be formed at a time, the surface quality of the product is poor, and the machining efficiency is low are solved. The forming die comprises an upper die and a lower die, wherein an opening is formed in the upper surface of the lower die, and a blank makes contact with the lower surface of the upper die and enters a lower die cavity through the opening; and a step is arranged on the side face of the upper die and corresponds to non-flush faces of the blank with different thicknesses. The forming method comprises the followingsteps: manufacturing the blank; welding the blank; placing the welded blank on the forming die, wherein a weld joint corresponds to the step of the upper die; and descending the upper die and a top cylinder to finish one-step forming of the special-shaped curved surface structural part with different wall thicknesses. With the forming die and method, one-step forming of the special-shaped curved surface structural part with the different wall thicknesses is realized.

Description

technical field [0001] The invention relates to the technical field of precision sheet metal processing, in particular to a forming die and a forming method of a special-shaped curved surface structural part. Background technique [0002] Aerospace components are becoming more and more complex, and non-uniform wall thickness products are widely used in aerospace vehicles as a typical component. [0003] The cold stamping processing device and processing technology can only process products with equal wall thickness. For products with non-equal wall thickness, they cannot be formed at one time, and only the process of tailor welding after segmental forming can be used. [0004] The process of segmented forming and then tailor welding has the following disadvantages: First, the process of segmented forming and then tailor welding requires manual repair, shape correction, and grinding, and the workload is heavy, resulting in extremely low product processing efficiency. Secondl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D22/06B21D45/02B21D43/00B21D37/12
CPCB21D37/10B21D22/06B21D45/02B21D43/003B21D37/12
Inventor 周蕾蕾刘奇李妍华李保永秦中环刘玉平韩维群
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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