Unsymmetrical stretching forming mould capable of inducing plate material to rebound

A stretch forming, asymmetric technology, applied in the field of sheet metal forming, can solve problems such as the complexity of the measurement process, the difference, the impact of the springback placement method, etc., and achieve the reduction of cutting times, good similarity, test repeatability and reproducibility Good results

Active Publication Date: 2008-04-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problems of the above method are: (1) Since the ring stretching is an axisymmetric deformation, its strain still belongs to two-dimensional deformation, so the springback measurement method is different from the evaluation of stamping springback; (2) The measurement process is complicated, It needs to be cut three times; 3) The measured springback is indirect springback, and the amount of springback is easily affected by the placement method

Method used

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  • Unsymmetrical stretching forming mould capable of inducing plate material to rebound
  • Unsymmetrical stretching forming mould capable of inducing plate material to rebound
  • Unsymmetrical stretching forming mould capable of inducing plate material to rebound

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Embodiment Construction

[0015] figure 1 It is a schematic diagram of the structure of the asymmetric stretch forming die for inducing the rebound of sheet metal in the present invention, including: punch 3, die 11, blank holder 4, punch fixing plate 2, die backing plate 7, lower template 1, Upper template 6, upper mold backing plate 8, shoulder-shaped guide post 5, push piece block 9, spring 10. The connection relationship is: the punch 3 is connected with the punch fixing plate 2 through screws, and is connected with the lower moving mechanism of the stamping equipment; the blank holder 4 is connected with the lower template 1 through screws, and is connected with the workbench; Sliding connection with the die 11 through the shoulder-shaped guide post 5; the die 11 is connected with the die backing plate 7, the upper die backing plate 8 and the upper template 6 through screws, and is connected with the upper slider of the equipment.

[0016] figure 2 It is a schematic diagram of the lower mold pa...

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Abstract

The present invention relates to a non-symmetrical stretcher forming die equipment capable of inducing resilience of plate material. It includes the following several portions: male die, female die, blank holder, male die fixing plate, femal die baseplate, lower die plate, upper die plate, upper die baseplate, pushing block and spring. Said invention also provides the connection mode of all the above-mentioned portions and the working principle of said die equipment.

Description

technical field [0001] The invention relates to a sheet material forming technology, in particular to an asymmetric stretch forming die for inducing sheet material springback. Background technique [0002] At present, various high-strength steel plates and aluminum alloy plates are more and more widely used in structural parts of mechanical products. These sheets have a greater amount of springback when formed than conventional sheets. It is necessary to establish a certain method or standard to assess the springback characteristics of this type of sheet metal after stamping, and to analyze the influence of process parameters on the sheet metal springback. [0003] Most of the existing springback evaluations (such as V-bending and U-bending) are simple bending evaluation methods. The V-shaped bending method is to determine the springback of the test material by measuring the inclination angle of the side wall before and after the V-shaped bending of the specimen; Angle α,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D37/12B21D22/20
Inventor 蒋浩民石磊陈新平谢坚强
Owner BAOSHAN IRON & STEEL CO LTD
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