Process for spot welding of crane beam housing assembly and apparatus for welding of crane beam housing assembly

摘要

The invention relates to a method and apparatus for the assembly welding of a girder casing of a crane. The method utilizes a light-construction clamp gantry, which can be moved on the casing, for pressing the plates to be welded against the internal structures of the casing. The apparatus comprises a frame structure (6) that rests on the upper surface of the casing on wheels, that acts as a carriage, and that comprises articulated vertical lever arms (5). The upper ends of the lever arms are interconnected with a power means (1), and the lower ends of the lever arms are arranged to rest on the casing from below.