Manufacturing method and manufacturing tool of belt type spiral

The invention relates to a manufacturing method and a manufacturing tool of a belt type spiral, and the manufacturing method of the belt type spiral comprises the following steps: processing a main shaft into a semi-finished main shaft; one end of each spoke is machined into a finished product end, the semi-finished spindle is placed on a manufacturing tool, and the semi-finished spokes of the first set are fixed and welded through a positioning structure; the main shaft rotates by 90 degrees, and the semi-finished spokes in the second group are fixed and welded through a positioning structure; milling gaps of the second group of semi-finished spokes; the main shaft rotates by 90 degrees, and notches of the first set of semi-finished spokes are milled; the spiral pieces and the corresponding notches are positioned, and the spiral pieces are welded; and finishing the semi-finished spindle to obtain a finished spindle. During welding, the manufacturing tool is used for positioning and clamping, the positioning