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Seam welding method and vehicular body

A technology of seam welding and car body, which is applied in the direction of vehicle parts, roller electrode welding, welding power source, etc., can solve problems such as difficulty in improving work efficiency, and achieve the effect of shortening processing time

Active Publication Date: 2016-03-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to form the vehicle body by the spot welding, larger parts need to use more welding spots, and it is difficult to improve work efficiency.

Method used

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  • Seam welding method and vehicular body
  • Seam welding method and vehicular body

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no. 1 Embodiment approach

[0030] First, refer to figure 1 The seam welding method according to the first embodiment of the present invention will be described in detail.

[0031] The seam welding method of this embodiment, for example, in figure 1 The illustrated side panel 101 of an automobile is used as a workpiece when welding the peripheral edge of the door opening 102 of the side panel 101 . The side plate 101 is formed by laminating a plurality of metal plates, and the joint portion 103 is formed by performing spot welding at a plurality of places around the periphery of the door opening 102 to maintain the shape, and the plurality of metal plates are temporarily fixed by the joint portion 103 .

[0032] The seam welding method of the present embodiment is performed as follows: the regions A, B, C, D, and E between the joining parts 103 are used as welded parts, and the welded parts are clamped between a pair of rolling electrodes not shown in the figure. During this time, the rolling electrod...

no. 2 Embodiment approach

[0041] Next, refer to figure 2 A vehicle body according to a second embodiment of the present invention will be described in detail.

[0042] In this embodiment, the figure 2 The illustrated side panel 201 of an automobile is explained as an example of a vehicle body. A portion of a side panel 201 serving as a vehicle body surrounding the front door opening 202 is constituted by a front portion 203 , a front pillar 204 , a center pillar 205 , and a side sill 206 . The front door opening 202 has a substantially quadrangular shape, and portions of the quadrangular shape corresponding to the vertex corners form corners 207 , 208 , 209 , and 210 that form sharp curves.

[0043] The front part 203, the front pillar 204, the center pillar 205, and the side sill 206 are all formed by laminating parts obtained by stamping a plurality of sheet metal materials. The stacking state of the sheet metal, such as the number, material, sheet thickness, etc., varies. For example figure ...

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Abstract

When a roller electrode passes through portions (103) to which at least a metal plate is temporarily spot-welded, the pressing force of the roller electrode on a workpiece (101) is reduced, the roller electrode stops being energized, and, after the roller electrode has passed through the portions (103), the pressure force of the roller electrode on the workpiece (101) and energizing of the roller electrode are restored, thereby reducing processing time when the workpiece (101) is seam-welded, and preventing the ends of a seam-welded joint from being stripped away even when the welding joint does not have an endless configuration.

Description

technical field [0001] The present invention relates to a seam welding method and a vehicle body obtained by seam welding. Background technique [0002] Conventionally, there is known a vehicle body for a vehicle such as an automobile obtained by spot welding a plurality of laminated metal plates at a plurality of locations (for example, refer to Patent Document 1). However, in order to form the vehicle body by the spot welding, it is necessary to use more welding spots for larger parts, and it is difficult to improve work efficiency. [0003] On the other hand, seam welding is known as one method of resistance welding, and is used, for example, in the manufacture of fuel tanks such as trucks (for example, refer to Patent Document 2). A plurality of stacked metal plates are sandwiched between the side surfaces of the disc-shaped body by a rolling plate electrode composed of a pair of disc-shaped bodies, and the rolling plate electrode is pressed against the metal plate with...

Claims

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Application Information

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IPC IPC(8): B23K11/24B23K11/00B23K11/06B62D25/02
CPCB23K2101/006B62D25/02B23K11/11B23K11/065
Inventor 河合泰宏栗本典子金子贡小林晴彦山足和彦
Owner HONDA MOTOR CO LTD
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