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Progressive drawing die and operation method thereof

A deep drawing die and progressive technology, applied in the field of progressive deep drawing dies, can solve problems such as difficult deep drawing forming, and achieve the effects of avoiding cumulative errors, saving manufacturing costs, and shortening the forming cycle

Active Publication Date: 2022-03-15
CHENGDU AIRCRAFT INDUSTRY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of this application is to provide a progressive drawing die and its operation method, aiming to solve the technical problem that the existing drawing die is difficult to draw in one step for workpieces with too large drawing ratio

Method used

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  • Progressive drawing die and operation method thereof
  • Progressive drawing die and operation method thereof
  • Progressive drawing die and operation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] refer to Figure 1-Figure 7 , the present embodiment provides a progressive drawing die, including a lower mold base 110, a punch assembly 120 and an electromagnet 130, and a molding cavity 111 is opened in the lower mold base 110, and the molding cavity 111 includes multiple layers from The parting cavity is arranged from top to bottom, and the cross-sectional area of ​​the parting cavity decreases successively from top to bottom. The punch assembly 120 includes a central punch 121, and a middle punch 122 is set on the center punch 121. The middle punch 122 is sleeved with an outer layer punch 123, the center punch 121, the middle punch 122 and the outer layer punch 123 can move relative to each other in the vertical direction, the center punch 121, the middle punch 122 and the outer layer punch Die 123 can stretch in the corresponding parting cavity, and the two side walls of central punch 121, the two side walls of middle punch 122 and the inner side wall of outer la...

Embodiment 2

[0056] refer to Figure 1-Figure 7 , the present embodiment provides a method for operating a progressive drawing die, comprising the following steps:

[0057] Place the blank 180 at the corresponding position on the top of the lower mold base 110, and give the blankholder 160 a blankholder force to fix the blank 180;

[0058] The punch assembly 120 moves down as a whole until the punch assembly 120 presses the blank 180 into the cavity of the first layer;

[0059] All electromagnets 130 between the middle punch 122 and the outer layer punch 123 are powered off, and the center punch 121 and the middle punch 122 continue to move down to press a part of the blank 180 into the second layer parting cavity. The punch 123 stays in the first layer parting cavity;

[0060] All the electromagnets 130 between the center punch 121 and the middle punch 122 are powered off, and the center punch 121 continues to move down to press a part of the blank 180 into the third layer parting cavit...

Embodiment 3

[0063] refer to Figure 1-Figure 7 In this embodiment, the intermediate punch 122 in the progressive drawing die is provided with two groups, which are respectively the middle punch A and the middle punch B, the middle punch A is set on the center punch 121, and the middle punch B Set on the middle punch A, the outer layer punch 123 is set on the middle punch B, and the corresponding electromagnet 130 is also embedded between each punch, then the parting cavity should be provided with four layers, so this embodiment A method for operating a progressive drawing die is provided, comprising the following steps:

[0064] Place the blank 180 at the corresponding position on the top of the lower mold base 110, and give the blankholder 160 a blankholder force to fix the blank 180;

[0065] The punch assembly 120 moves down as a whole until the punch assembly 120 presses the blank 180 into the cavity of the first layer;

[0066] All the electromagnets 130 between the middle punch B ...

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Abstract

The invention discloses a progressive deep drawing die and an operation method thereof.The die comprises a lower die base, a male die assembly and an electromagnet, a forming cavity is formed in the lower die base and comprises multiple layers of parting cavities arranged from top to bottom, the cross sectional areas of the parting cavities are sequentially decreased from top to bottom, and the male die assembly comprises a center male die; the center male die is sleeved with a middle male die, the middle male die is sleeved with an outer-layer male die, the center male die, the middle male die and the outer-layer male die can move relatively in the vertical direction, and the center male die, the middle male die and the outer-layer male die can stretch into the corresponding parting cavities; electromagnets are embedded in the two side walls of the center male die, the two side walls of the middle male die and the inner side wall of the outer layer male die, the electromagnets can be powered on and powered off, and the one-step deep drawing forming die has the advantages that one-step deep drawing forming can be conducted on workpieces with the too large deep drawing ratio, and the die cost is low.

Description

technical field [0001] The present application relates to the technical field of deep drawing, in particular to a progressive deep drawing die and an operation method thereof. Background technique [0002] Deep drawing is to apply complex external force to the sheet through the mold, which causes a complex stress state in the sheet and promotes the flow of the sheet in an ideal direction. In the deep drawing process, it is necessary to install a blank holder to generate frictional resistance to increase the tensile stress in the sheet, control the flow of the material, and avoid wrinkling. The size of blank holder force is an important process parameter and control method in sheet metal deep drawing. The traditional sheet metal deep drawing method often uses the elastic binder ring of the single-action press and the fixed binder ring of the double-action press to generate the blank-holder force required for deep drawing. [0003] Drawing die is a kind of die that draws fla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D37/12B21D22/22
CPCB21D37/10B21D37/12B21D22/22
Inventor 李晓军徐勇夏亮亮张士宏门向南陈铭
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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