Method of and apparatus for fabricating stator assemblies of electrical

Abstract

A method for fabricating stator assemblies of electrical machines and an apparatus suitable for carrying the method into practice, wherein a plurality of transfer tools receiving wound coils and inserting the coils into stator cores are transported by conveyors in two identical closed paths arranged symmetrically. Located along each closed path are a plurality of main coil winding devices for winding main coils and transferring them to the transfer tools, a plurality of auxiliary coil winding devices for winding auxiliary coils and transferring these coils to the transfer tools, and a transfer tool indexing device interposed between the main coil winding devices and the auxiliary coil winding devices for indexing the auxiliary coils with the main coils. A drawing-in device common to the two closed paths simultaneously draws the main and auxiliary coils on each transfer tool into stator grooves. The main coils wound by one of the main coil winding devices and the auxiliary coils wound by one of the auxiliary coil winding devices are successively transferred to each transfer tool while the latter moves in each closed path. The coils are simultaneously drawn into the stator grooves by the drawing-in device in one operation.