SEAM WELDING APPARATUS, SEAM WELDING METHOD, ROBOT CONTROL DEVICE, AND ROBOT CONTROL METHOD

摘要

In order to solve the problem of providing a seam welding device that is not affected by the surface condition or the entire body shape of a piece of work, a seam welding apparatus (10) is provided with: a pair of rotary electrodes (31, 32), an electrode support frame (37), a distance measuring means (50), and a control unit (43). The electrode support frame (37) supports the pair of rotary electrodes (31, 32). The distance measuring means (50) is provided to the electrode support frame (37), and measures the distance to an edge (61a) of a steel plate (61). When a real distance measured by the distance measuring means (50) deviates from a prescribed distance, the control unit (43) controls a robot (20) to adjust the travelling direction of the rotary electrodes (31, 32) such that the deviation reaches zero. Thus, the provided seam welding apparatus (10) has a reduced size whilst not being affected by the surface condition or the shape of a piece of work (steel plate (61)).