Clamping fixture for automatic spiral blade welding

The invention relates to a clamping fixture for automatic spiral blade welding. The clamping fixture comprises an installation part and clamping parts and an adjusting mechanism which are arranged onthe installation part, the clamping parts are arranged in the circumferential direction of the installation part at intervals, clamping sub-parts are arranged on the clamping parts at equal intervals,clamping openings used for clamping spiral blades are formed in the clamping sub-parts, the clamping sub-parts at the same number of times on each clamping part form a clamping unit for fixing a circle of the spiral blades, the clamping sub-parts on the same clamping unit are arranged in a spiral line shape, each clamping part is movably mounted on the installation part, the adjusting mechanism comprises a radial adjusting unit, the clamping parts are connected with the radial adjusting unit, and the radial adjusting unit adjusts the distance between the clamping sub-parts on each clamping part and the center of the i