Multi-blank-holder radial blocking-blank pressing method applied to nonaxisymmetrical piece

A non-axisymmetric, blank holder ring technology, applied in the blank holder field, can solve the problem of separate blank holder, reduce the total blank holder force, improve the forming quality and forming limit, and optimize the blank holder effect.

Inactive Publication Date: 2012-07-04
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of existing blank-holding methods, solve the problem of separate blank-holding of different radially deformed particles in the fillet area, optimize the drawing process, and improve the deep-drawing of non-axisymmetric parts (box-shaped parts). The blankholder effect, providing a multi-binder ring radial block blankholder method applied to non-axisymmetric parts

Method used

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  • Multi-blank-holder radial blocking-blank pressing method applied to nonaxisymmetrical piece
  • Multi-blank-holder radial blocking-blank pressing method applied to nonaxisymmetrical piece
  • Multi-blank-holder radial blocking-blank pressing method applied to nonaxisymmetrical piece

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings by taking the box-shaped part as an example:

[0013] The structural forms and relative positions of each blank holder and force transmission plate are as follows: figure 1 , 2 , 3 shown.

[0014] As shown in the accompanying drawings, the blank holder area is divided into eight, four in the straight edge area and four in the rounded corner area, and each rounded corner area is divided into four small areas according to the radial position; the blank holder ring 10 It is mainly used for blanking of straight edges. The four blanking rings 4, 5, 6 and 7 in each fillet area are mainly used for blanking of rounded corners. Each blanking ring moves in the vertical direction without interfering with each other. , respectively provide blank-holding force.

[0015] In the actual drawing process, when the upper mold goes down, the die 8 first contacts the slab, and the blank ho...

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Abstract

The invention relates to a multi-blank-holder radial blocking-blank pressing method applied to a nonaxisymmetrical piece. The multi-blank-holder radial blocking-blank pressing method is characterized in that the nonaxisymmetrical piece adopts the circumferential blocking and blank pressing at a straight side part of a female die, and a fillet part of the female die adopts the radial blocking and blank pressing; and all blank holders in radial blocking and flange pressing move independently in the vertical direction, and blank holder forces are respectively provided for the corresponding position of each blank holder in a plate material flange deforming area. The multi-blank-holder radial blocking-blank pressing method has the advantages that the problem that different deformation particles are subjected to blank pressing in the radial direction respectively in the fillet area in the deep drawing process of the nonaxisymmetrical piece (a box-shaped piece) can be solved, and the defect of single circumferential blank pressing can be compensated, so that the further blank pressing effect can be optimized, and the nonaxisymmetrical piece (the box-shaped piece) forming quality is improved.

Description

technical field [0001] The invention relates to the field of sheet metal forming, in particular to a blank-holding method applied in the deep drawing process of a non-axisymmetric piece (box-shaped piece). Background technique [0002] In sheet metal deep drawing, when the structure and size of the mold, the material to be processed, the forming speed, the lubrication state, the forming temperature, etc. are constant, the blank holder force is the only process parameter that can be controlled. Generally speaking, if the blank-holding force is too small, the sheet is easy to wrinkle; if the blank-holding force is too large, the tendency of the sheet to be cracked increases. Blindholder force and related technologies have always been difficult and hot issues in deep drawing. [0003] In the deep drawing process of non-axisymmetric parts (taking box-shaped parts as an example), since the thickness of the deformed particles on the flange area is constantly changing, the deforma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/21
Inventor 秦泗吉
Owner YANSHAN UNIV
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