WELDING DEVICE AND WELDING METHOD

摘要

To provide a technique wherein a compact pressing body with a pressing surface smaller in the area than a welding range can weld together sheet-like members over the whole area of the welding range by pressing the sheet-like members being reliably moved in a direction substantially orthogonal to a pressing direction of the pressing body. In a state where sheet-like members (S) are pressured by a pressing surface (35a) pressing the sheet-like members in a pressing direction (Z), the sheet-like members (S) are repeatedly pressured by a horn (35) during a predetermined pressuring time in one cycle of a preset low-frequency vibration period by maintaining the horn (35) in low-frequency vibration with the low-frequency vibration period. Therefore, the sheet-like members (S) being reliably moved in the direction substantially orthogonal to the pressing direction (Z) can be welded together over the whole area of the welding range by pressing with the compact horn (35) including the pressing surface (35a) smaller in the area than the welding range.