Press-working method, and press-working apparatus

A technology of stamping processing and stamping forming, which is applied in the field of stamping processing and stamping processing devices, can solve problems such as tensile stress concentration, and achieve the effect of preventing wrinkles

Inactive Publication Date: 2009-09-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the part formed in such a concave angle shape is formed by burring the workpiece, te

Method used

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  • Press-working method, and press-working apparatus
  • Press-working method, and press-working apparatus
  • Press-working method, and press-working apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0078] figure 1 It is a front view showing the structure of a vehicle rear side outer panel 180 as a formed product press-formed by the press working apparatus and the press working method according to the first embodiment of the present invention.

[0079] The rear outer panel 180 is made of a single steel plate, and has a substantially flat upper panel 181 and lower panel 182 , and a flange 183 that fits into a door of a vehicle (not shown).

[0080] Characteristic lines 185 serving as ridgelines formed by bending a steel plate are formed on the rear outer panel 180 . As a result, the rear outer panel 180 takes the characteristic line 185 as the boundary line according to the figure 1 The middle and upper parts are divided into upper plate 181 and lower plate 182 .

[0081] The flange portion 183 is provided on the top of the plate 181 and the bottom of the plate 182. figure 1 Center left. The flange portion 183 is formed by bending the end of the steel plate along figu...

no. 2 approach

[0140] Figure 11 It is a front view showing the structure of the vehicle rear side outer panel 280 press-formed by the press working apparatus of the 2nd Embodiment of this invention.

[0141] The rear outer panel 280 is made of a single steel plate, and has a substantially flat upper panel 281 and lower panel 282 , and a flange 283 that fits into a door of a vehicle (not shown).

[0142] The upper part 281 of the plate and the lower part 282 of the plate are separated and located at the boundary of the characteristic line 285 Figure 11 Upper and lower parts. This characteristic line 285 is an important ridgeline in design.

[0143] The flange part 283 is provided on the upper part 281 of the above-mentioned board and the lower part 282 of the board. Figure 11 Center left. The flange portion 283 is formed by bending the end of the steel plate along the Figure 11 Extend in the up and down direction. In addition, in this flange portion 283 , a recessed corner portion a...

no. 3 approach

[0191] Figure 17 It is a front view showing the structure of a vehicle rear side outer panel 380 press-formed by a press working apparatus according to a third embodiment of the present invention.

[0192] The rear outer panel 380 is made of a single steel plate, and has a substantially flat panel body 381 and a flange portion 385 that fits into a door of a vehicle (not shown).

[0193] The plate main body 381 is bordered by a characteristic line 382 formed by bending the steel plate. Figure 17 The upper and lower parts are divided into upper plate 383 and lower plate 384 .

[0194] The flange portion 385 is provided on the top of the plate 383 and the bottom of the plate 384. Figure 17 Center left. The flange portion 385 is formed by bending the end of the steel plate along the Figure 17 Extend in the up and down direction. In addition, in this flange portion 385 , a recessed corner portion adjacent to the plate portion 383 constitutes a bent portion (end portion) 38...

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PUM

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Abstract

The invention provides a press-working apparatus capable of forming a clear character line. The press-working apparatus (110) forms a product having a character line. The press-working apparatus (110)The invention provides a press-working apparatus capable of forming a clear character line. The press-working apparatus (110) forms a product having a character line. The press-working apparatus (110) comprises an upper die (138) and a lower die (152) arranged across a steel sheet (112), an upper die mechanism (118) for moving the upper die (138) toward and away from the lower die (152), a first hcomprises an upper die (138) and a lower die (152) arranged across a steel sheet (112), an upper die mechanism (118) for moving the upper die (138) toward and away from the lower die (152), a first holder (142) and a second holder (144) for clamping the steel sheet (112) and applying an unwrinkling force to the same, and a control unit (116) for controlling the upper die mechanism (118) and the folder (142) and a second holder (144) for clamping the steel sheet (112) and applying an unwrinkling force to the same, and a control unit (116) for controlling the upper die mechanism (118) and the first holder (142). The upper die (138) is divided on thecharacter line of the product into a first upper die (148) and a second upper die (158). The control unit (116) makes the unwrinkling force by tirst holder (142). The upper die (138) is divided on thecharacter line of the product into a first upper die (148) and a second upper die (158). The control unit (116) makes the unwrinkling force by the first holder (142) stronger than that by the second holder (144), so that the steel sheet (112) is press-worked by the second upper die (158) and then by the first upper die (148).he first holder (142) stronger than that by the second holder (144), so that the steel sheet (112) is press-worked by the second upper die (158) and then by the first upper die (148).

Description

technical field [0001] The present invention relates to a stamping processing method and a stamping processing device. Background technique [0002] Conventionally, for example, an outer panel of a vehicle is formed by press forming a thin plate-shaped workpiece (see Patent Document 1). According to the pressing method and the pressing apparatus disclosed in this patent document 1, the ends of the workpiece are clamped by the blank ring, and wrinkle-preventing pressure is applied to the workpiece. Then, the upper mold is lowered, and the workpiece is punched with the upper mold and the lower mold to perform press forming. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 63-194826. [0004] However, there are cases where character lines are formed on the outer panel surface of the above-mentioned vehicle. The characteristic line refers to a design-important ridge line formed on the surface of a molded product such as an outer panel of a vehicle. Such ...

Claims

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Application Information

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IPC IPC(8): B21D24/04B21D24/14B21D22/26
Inventor 前田真吾回秀夫高桥圣次永井裕一
Owner HONDA MOTOR CO LTD
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