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Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method

A high-strength steel, laser tailored welding technology, applied in the direction of comprehensive factory control, digital control, electrical program control, etc., can solve problems such as curve weld layout and forming research, and achieve the effect of improving forming quality and improving analysis accuracy.

Inactive Publication Date: 2008-04-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above studies mainly involve the influence of different weld positions on the formability of tailored welded blanks, and no specific research has been conducted on the layout and form of curved welds

Method used

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  • Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method
  • Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method
  • Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: In the stamping process of high-strength tailor-welded blanks with differential thickness of curved weld seams, step blankholders are used to load variable blankholder forces that decrease linearly with the stroke of the punch (see Figure 5), or linearly decreasing blankholders are used. The variable punching speed technology (Figure 6) can control the direction and size of the sheet metal flow, and ensure that the curved weld seam difference thickness high-strength steel laser tailor-welded blank obtains better formability.

Embodiment 2

[0045] Example 2: Simultaneously adopt linearly decreasing variable blank holder force and linearly decreasing variable stamping speed technologies, and coordinate and optimize these two technologies to improve the formability of curved weld seam differential thickness high-strength steel laser welded blanks .

Embodiment 3

[0046] Embodiment 3: Design 5 clamping columns to control the movement of the weld seam near the thick-side base metal near the weld, and design a circular radius of 100mm process hole (Fig. 7) near the weld near the thick-side base metal to increase The flow of thick-side material makes the thick-side sheet metal deform more fully, and achieves better forming performance of laser-welded blanks of high-strength steel with different thickness.

[0047] The curve welds of different shapes differ in thickness and high-strength steel laser welded blanks, and the weld arrangement in the range of 120° to 150° can obtain better formability. If the arranged curvilinear welds are poor in thickness and high-strength steel tailor-welded blanks have poor formability or cannot be formed, advanced forming technologies such as variable blank holder force, variable stamping speed, welding seam clamping columns, and forming process holes can be used. Achieve shaping.

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Abstract

The invention relates to the laser welding plate forming research field, and is mainly applied to such occasion as layout and forming of different thickness high-strength steel laser welding board curved welding seams. The invention is provided with a curved welding seam which has different forms for a laser welding board, thereby getting reasonable seam layout through the welding seam moving an analytical model and the accurate modeling approach thereof, and improving the forming performance of the welding board; wherein, the flow of materials is improved and the layout and the good forming of different thickness high-strength steel plate laser welding board curved welding seam are achieved based on the variable blank-holder force, variable stamping speed, clamping in weld, designing cope hole with welding thick base metal, and other advanced forming technologies. By the method, the layout of the welding board curved welding seam is optimized, thereby increasing the forming performance of a curved welding seam welding board, and widely using.

Description

technical field [0001] The invention belongs to the field of stamping and forming of tailor-welded blanks, in particular to a method for arranging and forming curved seams of laser tailor-welded blanks of high-strength steel with differential thickness, and is mainly used in the design of laser tailor-welded blanks of high-strength steel with differential thickness and curved welds Where body panels are manufactured. Curved welds can better adapt to the characteristics of large size and complex spatial surfaces of body panel parts. By adopting the method, the welding seam layout of the high-strength steel laser tailor welded blanks with different thicknesses can be realized, the flexibility of the curved weld seam layout can be increased, the forming performance of the tailor welded blanks can be improved, and the forming quality can be guaranteed. Background technique [0002] Tailored welded blanks refer to the welding of two or more flat sheets for stamping to meet the p...

Claims

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Application Information

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IPC IPC(8): G05B19/18B21D22/00
CPCY02P90/02
Inventor 陈炜李卫国李新城吕盾岳陆游
Owner JIANGSU UNIV
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