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Multipoint blank holder force variable hydraulic press

A technology of variable blank-holding force and press, which is applied in the field of sheet metal stamping and forming, and can solve problems such as changes in blank-holding force and low precision of blank-holding force

Inactive Publication Date: 2005-06-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this press is that the blank-holding force applied to different parts has low accuracy, and at the same time, the blank-holding force at different parts cannot be changed with the change of the stamping stroke during the stamping process

Method used

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  • Multipoint blank holder force variable hydraulic press

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Embodiment Construction

[0009] Such as figure 1 As shown, the present invention comprises: main cylinder 1, crossbeam 2, slide block 3, column 4, base 8, workbench 13 and hydraulic drawing pad mechanism 5, and its connection relation is: main cylinder 1 is fixed on crossbeam 2, and main cylinder The piston of 1 is connected to the slider 3, the slider 3 slides up and down along the column 4, the hydraulic drawing pad mechanism 5 is set at the lower part of the workbench 13, the base 8 supports the above components, and the frame is fixed on the ground with anchor bolts .

[0010] The hydraulic drawing pad mechanism 5 includes: connecting rod 6, several blank holder cylinders 7, jacking cylinder 9, bottom plate 10, pull down rod 11, drawing backing plate 12, ejector rod 14, and its connection relationship is: blank holder cylinder 7 The jacking cylinder 9 is fixed on the bottom plate 10, the upper end of the pull rod 11 is connected with the worktable 13, and the lower end is connected with the botto...

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PUM

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Abstract

The invention is a multi-point altering edge pressing force hydraulic pressure presser which is for sheets pressing shaping field. The invention includes: main cylinder, bridging beam, sliding block, crutch, hydraulic power drawing mechanism, base, and workbench. The main cylinder is fixed on the bridging beam with its piston linked with the sliding block which sliding up and down along the crutch. The hydraulic power drawing mechanism is set below the workbench all supported by the base. The hydraulic power drawing mechanism includes connecting rod, several edge cylinders, jacking cylinder, soleplate, lower draw rod, drawing bed piece, jacking rod. The invention advantages are that several independent controlling edge cylinder is installed below the presser casting through the drawing bed plate on different sections of the edge rings with different edge pressing force altering by time so to precisely control the edge pressing force stroke-wise according to the technics and the designer requirements so that the sheet shaping property and size stability is greatly enhanced which lies a cornerstone for enhance the pressing piece qualities.

Description

technical field [0001] The invention relates to a press, in particular to a multi-point variable blank-holding force hydraulic press, which is used in the field of sheet metal stamping and forming. Background technique [0002] Since the wrinkling and cracking tendencies of stamping parts are different at different stages during the stamping forming process, the blank holder force should also change with the change of the punch stroke; and different parts of the asymmetrical parts require different blank holder forces to ensure the stamping The forming quality of the parts, therefore, the requirements for the press are getting higher and higher. Traditional presses generally use springs and air cushions to apply blank-holding force, but since the blank-holding force exerted by these elastic elements is generally linearly proportional to the compression of the elastic element, the blank-holding force applied during the stamping process cannot be controlled. At the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B30B1/32
Inventor 林忠钦陈关龙蒋浩民孙成智徐伟力
Owner SHANGHAI JIAO TONG UNIV
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