Molded line adjustable fan volute, fan for testing and magnetic part thickness design method

The invention relates to a molded line adjustable fan volute, a fan for testing and a magnetic part thickness design method, which can improve the performance of the fan and remarkably reduce the iteration time and the manufacturing cost of the design. The fan volute with the adjustable molded line comprises a volute frame, the volute frame comprises a pair of end covers arranged at intervals, and each end cover is provided with an air inlet and a plurality of adjusting grooves formed around the air inlet; the volute annular wall comprises an elastic side wall movably arranged between the two end covers and a volute tongue fixedly arranged between the two end covers; one end of the elastic side wall is fixedly connected to the two end covers, so that an air outlet is defined by the elastic side wall and the volute tongue; the other end of the elastic side wall sequentially passes through the adjusting grooves and is wound in the volute tongue to form a winding drum. The two ends of each adjusting rod are inse