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Method for testing forming limit of tailor welded blank during metal plate incremental forming

A technology of incremental forming and sheet metal, applied in the field of sheet metal forming, can solve problems such as weld cracking, and achieve the effect of simple operation steps

Inactive Publication Date: 2015-12-09
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the included angle and deformation are too large, it will cause the crack of the weld

Method used

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  • Method for testing forming limit of tailor welded blank during metal plate incremental forming
  • Method for testing forming limit of tailor welded blank during metal plate incremental forming
  • Method for testing forming limit of tailor welded blank during metal plate incremental forming

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] A forming limit test method of tailor-welded blanks in incremental forming of sheet metal mainly includes two parts: test and data reading.

[0029] Specifically include the following steps:

[0030] Step 1: Construct the geometric model required for forming in the 3D modeling software, such as conical parts with different forming angles θ;

[0031] Step 2: If figure 1 , 2 As shown, the fixture base 1 is installed on the workbench of the progressive forming machine tool, and then the supporting plate 2 and the pressing plate 3 are placed in sequence, and a line is drawn on the supporting plate 2 to determine the offset l of the weld 6. 3. Place the sheet material 4 in the middle. When placing it, the weld seam 6 needs to be aligned with the marking line on the support plate 2. Fix the supporting plate 2 and the pressing plate 3 on the fixture base 1 with fas...

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Abstract

The present invention discloses a method for testing forming limit of a tailor welded blank during metal plate incremental forming, a part model needed by forming is constructed in three-dimensional modeling software, and a numerical control code is generated; the tailor welded blank is mounted between a fixture support plate and a pressure plate, and the weld joint offset position can be determined by marking on the support plate; a tool head is used for forming a plate, when the weld joint ruptures, the processing is stopped, and the depth of the rupture position is measured; according to the rupture depth, an included angle of a weld joint tangent line and a first principal strain position in the rupture position can be read out in the model, and the relation curve of the included angle and the forming angle can be drawn. The method for testing the forming limit of the tailor welded blank during metal plate incremental forming is simple in operation steps; the data needed to draw the curve can be obtained by forming of a small amount of the plate; and the rupture forming Phi- Theta diagram can provided a basis for testing the forming limit of the tailor welded blank during metal plate incremental forming.

Description

technical field [0001] The invention relates to a forming limit test method of tailor welded blanks in progressive forming of sheet metal, and belongs to the technical field of sheet metal forming. Background technique [0002] Sheet metal incremental forming technology is a flexible manufacturing technology suitable for single-piece, small-batch sheet metal products. With the help of the idea of ​​"layered manufacturing", the technology uses the forming tool head to do contour movement under the control of the numerical control system to form the sheet material layer by layer. This forming method saves the high cost of mold manufacturing and enables the production of sheet metal products to be digitized and customized. [0003] Tailored welded blanks have been widely used in automotive, aerospace and other fields. The main advantage of Tailored Welded Blank: It can take into account the strength and weight of sheet metal parts at the same time. Since the thickness of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/28
Inventor 史晓帆查光成吴梦陵陆传凯
Owner NANJING INST OF TECH
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