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A sheet material wrapping forming device and forming method

A plate and cladding technology, which is applied in the field of plate wrapping and forming devices, can solve the problems of easily broken forming height, etc., and achieve the effects of reducing equipment scale, saving production costs, and reducing total energy

Inactive Publication Date: 2016-03-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems of severe material thinning, easy cracking and shallow forming height in the drawing process of the sheet, a sheet wrapping forming device and a method for drawing and forming using the device are proposed. The discharge coil makes the plate area facing the rounded corner of the die bend and bulge, and the plate is gradually wrapped around the punch through step-by-step discharge to form a cylindrical part

Method used

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  • A sheet material wrapping forming device and forming method
  • A sheet material wrapping forming device and forming method
  • A sheet material wrapping forming device and forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] refer to Figure 1a ~ Figure 1h , a sheet material wrapping forming device, including a punch 1, a die 2, and a blank holder 3 for cooperating with the top surface of the die 2 to press a sheet 5, and the sheet 5 is drawn and deformed to produce a flange portion 51 , the flange portion 51 refers to the horizontal undeformed annular portion on the plate 5 , and the function of the blank holder 3 thereafter is mainly to press the flange portion 51 of the plate 5 .

[0063] The blank holder 3 is located above the die 2, and the die 2 is provided with a rounded corner 21 that is convenient for drawing the plate 5, and the die 2 is equipped with an anti-expansion coil 4 at a position corresponding to the rounded corner 21. , as a preference of this embodiment, the anti-expansion coil 4 is a concentric coil, and the anti-expansion coil 4 is used to make the area of ​​the plate 5 that slides to the fillet 21 of the die 2 move away from the fillet 21 after being energized Bend...

Embodiment 2

[0071] refer to Figure 2a ~ Figure 2h , the difference from Example 1 is that on the basis of Example 1, upper close-packed coils are respectively provided on the blank holder 3 and the die 2 at positions corresponding to the flange portion 51 of the plate 5 6 and the lower close-packed coil 7, as a preferred embodiment of this embodiment, the upper close-packed coil 6 and the lower close-packed coil 7 are concentric coils, and the upper close-packed coil 6 and the lower close-packed coil 7 are under the action of pulse current Lateral electromagnetic force is generated to push the flange portion 51 of the plate 5 toward the punch 1 .

[0072] The deep drawing forming method of a kind of plate wrapping forming device described in embodiment 2 is as follows:

[0073] Such as Figure 2a As shown, firstly, the plate 5 to be formed is placed between the blank holder 3 and the die 2 . The upper close-packed coils 6 and the lower close-packed coils 7 are arranged in the grooves ...

Embodiment 3

[0075] refer to Figure 3a ~ Figure 3hThe difference between embodiment 3 and embodiment 2 is that, on the basis of embodiment 2, a side push coil 8 is arranged between the blank holder 3 and the die 2, as a preferred embodiment of this embodiment , the side push coil 8 is a concentric coil, and the side push coil 8 surrounds the flange portion 51 of the plate 5, and the side push coil 8 generates side thrust under the action of a pulse current to apply a lateral force to the outer edge of the flange portion 51 of the plate 5. The electromagnetic force pushes the flange portion 51 of the plate 5 toward the punch 1 .

[0076] The deep drawing forming method of a kind of sheet material wrapping forming device described in embodiment 3 is as follows:

[0077] Such as Figure 3a As shown, firstly, the plate 5 to be formed is placed between the blank holder 3 and the die 2 . The upper close-packed coils 6 , the lower close-packed coils 7 and the side push coils 8 are arranged in...

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Abstract

The invention discloses a plate packaging and drawing forming device which comprises a male die, a female die and an edge pressing ring which works together with the top end face of the female die to press a plate, wherein the edge pressing ring is positioned above the female die; a fillet convenient for drawing and forming of the plate is arranged on the female die; an anti-expansion coil is mounted on the female die and corresponds to the fillet; the anti-expansion coil is a concentric coil and is used for enabling the plate region sliding to the fillet of the female die to be bent and expanded in the direction far away from the fillet so as to form a bent and expanded part after the anti-expansion coil is powered on. An electromagnetic discharging coil is arranged at the fillet of the female die, so that the plate region opposite to the fillet of the female die can be bent and expanded; therefore, the flowability of a material of a flange part of the plate can be effectively improved, and the drawing and forming quality of a part is finally improved.

Description

technical field [0001] The invention belongs to the field of sheet metal deep drawing and forming, and more specifically relates to a sheet material wrapping and forming device and a method for using the device for deep drawing and forming. Background technique [0002] In the traditional sheet metal deep drawing process, the cracking defect often occurs at the place where the wall thickness changes the most. The root cause of workpiece rupture is that the load-bearing area of ​​the side wall of the workpiece is damaged due to excessive tensile stress during deep drawing. [0003] The tensile stress transmitted by the side wall during deep drawing is used for the following three parts: to overcome the deformation resistance of the blank flange deformation zone; to overcome the bending resistance of the blank at the rounded corner of the die; to overcome various friction losses. Under normal circumstances, the proportions of the three are about 70%, 20% and 10%, respectively...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/14B21D37/12
Inventor 莫健华李建军崔晓辉方进秀周波黄亮
Owner HUAZHONG UNIV OF SCI & TECH
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