Patent GB-1290476-A (GB)
IPC: H02K15/06
Filed: 1970-02-16
Abstract: 1290476 Making stators; winding and reeling; shearing INDUSTRA PRODUCTS Inc 16 Feb 1970 [29 July 1969] 7337/70 Headings B3A B3E and B3W  Apparatus A, Fig. 1, for winding and placing coils in stator slots comprises, an indexing conveyer 1, a plurality of placer heads 3A-3C, means for indexing the conveyer to move each placer head successively to a series of winding stations WS1, WS2 and thence to a placing station, a transfer mechanism at each winding station comprising means for transferring the wound coil to a placer head, and means at the placing station for pushing the coils into the stator slots. Coil winding (Figs. 24B, 24C).-Wire PW is led through a tensioning unit 253 and upper and lower tubes 185, 187 of a flyer 171 to a clamp unit 513 mounted on a carriage 507. The unit 253 is activated when a flyer carriage 193 and the clamp carriage 507 are in their starting positions 193a, 507a. A drum 153, the flyer 171, and lead-screws 213, (215) are rotated via a drive 235 and gears (237), (239), Fig. 8 (not shown). The lead-screws rotate in opposite directions and depending on the direction of winding, either a follower 241 or (243) engages the lead-screw 213 or (215) respectively, to traverse the flyer carriage upwardly, the tube 187 telescoping over the tube 185. When a number of turns have been wound on the lowest step of the coil form 169, the jaws 575 of two wire holder units clamp the wire against the form, thereby allowing the clamp unit 513 to be released. The carriage 507 is then lowered to position 507b. When about half the full number of turns of the coil PC1-PC3 have been wound, the motor 177 is decelerated and subsequently stopped when winding is completed. Coil transfer.-The carriage 507 is raised and a clamp unit 515 clamps the wire extending between the coil form and the tube 187. A wire eyelet 257 is withdrawn from a position coincident with the coil axis to allow pushers 275, 287 to be lowered and the jaws 575 are retracted. A stem 277 engages a head 415 on a tube 413, which is driven down against a spring 417. The tube 413 telescopes over a tube 401, Fig. 7, and drives a slider 405 downward along with guidebars (449), (463) and guide-pins (451), (453), (455) so that the bars and pins extend below the coil form with their lower ends engaging fingers (21) of the placer head 3A, Figs. 10-15A (not shown). The slider engages a plate 391 driving it downwardly until a roller 389 drops into a pocket 399 to collapse section 353 of the coil form. The pusher 287 now disengages latches 479 from a groove 495, Fig. 7, in a cylinder 327 and a rod 300 secured to the pusher engages a rod 311, Fig. 24A (not shown). Hydraulic cylinders 293 then drive the pusher 287 while the pusher 275 remains stationary. The pusher 287 slides over the tube 413 and pushes a slider 421 to drive stripper bars 425, (427) to strip the coil from the coil form down on to the placer head 3A. Prior to actuation of the cylinders 293, the follower is released from the lead-screw, so that as the rod 300 drives the rod 311 the flyer carriage 193 and tube 187 are returned to their starting positions along with the clamp carriage 507. The pusher 287 is raised by the cylinders 293 and then both pushers 275, 287 are raised in unison by the cylinder 269. The winding process is repeated, but in the opposite direction, and on completion of winding with the clamp carriage lowered to position 507b, the placer head 3A is rotated 90 degrees to receive the coil. Two further coils are wound and placed on the head to complete a phase winding (P1-P4), Fig. 4 (not shown). Wire cutting.-After the fourth winding (P4) has been placed on the head, the wire is retained clamped, so that there is a reach of wire between the clamp jaws and the flyer 171. A cylinder 597 is then actuated to swing a lead puller on an arm 593 on to the reach of the wire and bring the wire into a notch 615 of a wire cutter, Fig. 23. A punch 617 driven by a cylinder 609 cuts the wire and the wire extending from the clamp serves as a lead for the next set of phase windings to be wound. The placer head 3A is indexed to the winding station WS2, where four main windings (M1- M4) are wound in the same manner as described above, and it is indexed to the placing station PS. Coil placing.-A stator is applied to the placer head 3A and clamp units 59 are actuated to lower and swing jaws 75 into engagement with the stator. A unit 19 is then actuated to drive a stripper (51) upwardly and drive the coils (P1-P4) and (M1-M4) and bore wedges (BW) into the stator slots, Figs. 4, 5 (not shown).