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Blank holder of stamping tool for motor vehicle body lining

A technology of stamping tool and blank holder, applied in the field of stamping of sheet metal parts, can solve the problems of variable thickness, wrinkles and cracks, and achieve the effect of reducing size and realizing simplification

Active Publication Date: 2017-03-15
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the lining has variable thickness and sharp corners that risk wrinkling and cracking

Method used

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  • Blank holder of stamping tool for motor vehicle body lining
  • Blank holder of stamping tool for motor vehicle body lining
  • Blank holder of stamping tool for motor vehicle body lining

Examples

Experimental program
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Embodiment Construction

[0038] In the present invention, the direction of punching corresponds to the direction of opening and closing of the punching tool allowing sheet metal working operations. The horizontal direction is perpendicular to the direction of punching.

[0039] figure 1 is an isometric view of a stamping tool 2. figure 1 The binder ring and the punch 4 surrounded by the binder ring are shown. The punch is shown by its fastening surface 6 . Tool 2 also includes a female die, not shown for reasons of clarity. The female die is known to have a cavity into which the male die 4 is inserted to form a sheet metal blank (not shown). The punch 4 (shown by its working surface) is complementary to the cavity, their surfaces abutting. The die and / or punch 4 and / or the blankholder are rigid, possibly metallic.

[0040] The punch 4 generally has a quadrangular, trapezoidal shape. It allows to realize the lining of the left rear door of a motor vehicle. This opening forms a belly-shaped wind...

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Abstract

The invention discloses a blank holder of a stamping tool for a motor vehicle body lining, and relates to a stamping tool 2 for conducting open stamping. The blank holder allows the realization of a lining of a vehicle door. The stamping tool 2 includes recessed die, a terrace die 4 which is intended for inserting to a die cavity for the realization of the lining in molding a blank of a sheet metal part, and a blank holder which has a fastening surface 6 which can be spread. The fastening surface 6 formes an open ring which surrounds the terrace die 4. The terrace die 4 includes a part 12 which interrupts the fastening surface 6 so as to form open stamping. As as supplement, a spiral area 16 which fixes the blank upon stamping is included in the fastening surface 6. The spiral area 16 is opened towards the opened part 12 along the edge of the terrace die 4 so as to reduce stamping depth.

Description

technical field [0001] This invention relates to stamping of sheet metal components, and more particularly to stamping for vehicle body linings. The invention also relates to a tool for carrying out open punching of sheet metal components. Background technique [0002] The door leaf of a motor vehicle usually has an outer sheet metal reinforced by a liner. This lining allows maintaining the outer sheet metal by following strict geometrical tolerances. This allows adherence to aesthetic standards and thus allows an increase in the perceived quality that adds value to the vehicle. In addition, the lining contributes to the rigidity of the door leaf and supports various equipment. The lining should limit its deformation during operation and provide an anchoring area for the hinge. The lining is usually produced by means of a stamped sheet metal part extending substantially over the entire area of ​​the door leaf. [0003] Document EP2202011B1 discloses a sheet metal punchi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02B21D24/04B21D22/22B21D22/06
CPCB21D22/02B21D22/06B21D22/22B21D24/04B21D53/88
Inventor 伯特兰·弗里蒙特米克·布瓦德
Owner PEZHO SITROEN AUTOMOBILS SA
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