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Seam welding process and apparatus, wherein two plate-like workpieces are fed in a feeding direction toward a pair of roller electrodes, by guide rollers rotated by a driving device, while the workpieces are guided by a guiding device such that the edge portions overlap each other with a predetermin

Seam welding process and apparatus, wherein two plate-like workpieces are fed in a feeding direction toward a pair of roller electrodes, by guide rollers rotated by a driving device, while the workpieces are guided by a guiding device such that the edge portions overlap each other with a predetermined lap amount so that the overlapping edge portions are squeezed by the roller electrodes, and the edge portions are continuously welded together with a welding current being applied between the roller electrodes.

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[ We claim:] [1.] A seam welding process of continuously welding two plate-like workpieces at overlapping edge portions thereof while said overlapping edge portions are squeezed by a pair of roller electrodes disposed rotatably about respective two parallel axes thereof, said seam welding process co

[ We claim:] [1.] A seam welding process of continuously welding two plate-like workpieces at overlapping edge portions thereof while said overlapping edge portions are squeezed by a pair of roller electrodes disposed rotatably about respective two parallel axes thereof, said seam welding process comprising:a feeding step of feeding said two plate-like workpieces in a feeding direction toward said roller electrodes by a plurality of sets of guide rollers such that said two plate-like workpieces are pinched by said guide rollers in a direction of thickness thereof while said guide rollers are rotated;a guiding step of guiding said two plate-like workpieces being fed by said guide rollers, such that said edge portions overlap each other with a predetermined lap amount so that the overlapping edge portions are squeezed by said pair of roller electrodes; anda welding step of continuously welding said edge portions of said two plate-like workpieces squeezed by said pair of roller electrodes, by applying a welding current between said pair of roller electrodes.