US 2019/0126383 A1Published application

Seam welding method for vehicle door sash

AssigneeShiroki Corporation

InventorsJiro YOSHIHARA, Koji YOSHIDA, Toshifumi YANAI

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Abstract

Seam welding is performed by clamping a coupling portion of an upper sash with a first roller electrode and a second roller electrode, and applying electricity while rotating first roller electrode and the second roller electrode. The first roller electrode includes a plurality of first projecting portions and second projecting portions that are at intervals in a circumferential direction around a first rotational center. The second roller electrode may include a plurality of first opposing projecting portions and second opposing projecting portions that are at intervals in a circumferential direction around a second rotational center, by clamping a coupling portion of an upper sash and applying electricity while rotating.

Claims6

Dependent claims

A seam welding method for a vehicle door sash, the seam welding method comprising

performing seam welding by applying electricity between a first roller electrode and a second roller electrode in a state where a welding target portion is clamped by the first roller electrode and the second roller electrode rotating in conjunction with the first roller electrode, the welding target portion including a plurality of overlapped metal sheets out of regions of the vehicle door sash, the first roller electrode including a first row of a plurality of first projecting portions that are arranged at intervals in a circumferential direction around a first rotational center and a second row of a plurality of second projecting portions that are in locations shifted toward one side in an axial direction of the first rotational center from the first row and arranged at intervals in the circumferential direction around the first rotational center.

Dependencies are inferred from the claim text.