Design method of edge pressing device for drawing forming of continuous variable cross-section plate

A blankholder and panel technology, which is applied in the field of blankholders, can solve problems such as cracking of stepped compression rings, and wrinkling of blankholders in contact with blanks, so as to achieve the effect of reducing cracking and eliminating wrinkling

Active Publication Date: 2020-11-10
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a design method of a blank holder device for continuous variable section plate deep drawing, which can solve the wrinkling caused by the

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  • Design method of edge pressing device for drawing forming of continuous variable cross-section plate
  • Design method of edge pressing device for drawing forming of continuous variable cross-section plate
  • Design method of edge pressing device for drawing forming of continuous variable cross-section plate

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[0013] The principle of the present invention and its implementation will be further explained by the following examples and with reference to the drawings.

[0014] Automobile B-pillar is one of the typical thin-walled structural parts. The middle part of the traditional B-pillar uses a reinforcing plate to obtain higher strength. Variable cross-section plate forming automobile B-pillar adopts increased thickness instead of reinforcing plate, which has lower cost and higher performance. According to the forming characteristics of the B-pillar, deep drawing takes place in the width direction, and the two sides adopt a blanking method to provide resistance; the two ends of the length direction, subject to boundary conditions, are subject to greater resistance, and can be converted to a blanking method. For this reason, the B-pillar can be abstracted as a rectangular box-shaped piece.

[0015] The structure of the edge holding device for deep drawing forming of continuous variable ...

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Abstract

The invention discloses a design method of an edge pressing device for drawing forming of a continuous variable cross-section plate, and belongs to the field of automobile stamping die design. The problems of cracking, wrinkling and the like caused by mismatching of a continuous variable cross-section plate and a traditional blank holder are solved. The edge pressing device is a three-layer combined edge pressing device comprising a fixing plate (1), a middle supporting plate (2) and a hinge plate (4). The fixing plate and the hinge plate are respectively connected with the middle supporting plate through connecting bolts and spring guide columns (3). The hinge plate comprises a transition area plate (43), a thin side plate (41) and a thick side plate (44), the transition area plate is connected with the thin side plate (41) and the thick side plate through hinges (42), and the transition area plate, the thin side plate and the thick side plate can rotate relative to one another. The edge pressing device designed by the invention has the following advantages that (a) wrinkles in the forming process are reduced; (b) the edge pressing device is suitable for continuous variable cross-section plates with different plate thickness ratios; (c) the device is suitable for transition areas with different gradients and widths. and (d) variable blank holder force control can be realized.Different blank holder forces can be applied to different areas by adjusting the spring guide columns.

Description

technical field [0001] The invention relates to the field of stamping dies for automobiles, in particular to a design method of a blank-holding device adapted to deep-drawing of continuously variable-section plates. Background technique [0002] Continuously variable section plate is another automobile lightweight technology after tailor welded blank. It is a variable section thin plate with a predetermined thickness in the rolling direction obtained by adjusting the roll spacing in real time during the rolling process. Compared with tailor welded blanks, continuously variable section panels have the advantages of no weld seam, smooth transition zone and good uniformity. As a new type of plate, its application also faces many challenges, such as stamping die design, the original die design based on a single thickness plate is no longer applicable, especially the design of the blank holder needs to be improved urgently. [0003] The maximum slope of the transition zone of th...

Claims

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Application Information

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IPC IPC(8): B21D24/06
CPCB21D24/06
Inventor 陈水生杨志波任莉冯莽陈国强
Owner HENAN POLYTECHNIC UNIV
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