Patent GB-1167790-A (GB)
Title: Improvements in coil developing apparatus and method of achieving same.
IPC: H01F41/06
Filed: 1967-09-18
Abstract: 1,167,790. Coil winding apparatus; shearing. GENERAL ELECTRIC CO. 18 Sept., 1967 [15 Nov., 1966], No. 42354/67. Headings B3A and B3W. A coil winding apparatus 50 comprises a multi-stage coil form 62, winding means for producing serially connected wound coils on the coil form, clamping means for holding an end of the wire 86 during at least a portion of the winding cycle to permit the wire to be formed in coils, means for controlling oscillation of the wire during winding, a transfer device 88 releasably supported by means adjacent the coil form 62, and means for transferring the group of coils formed on the coil form into the transfer device whereby the transfer device with the coil group may be released from the supporting means to transfer the coil group away from the winding means. General construction of apparatus.-The coil form 62 is included in a winding assembly 52 and is mounted on a jump assembly 64, which, by means of a driving and control assembly 54, moves the coil form intermittently to locate it in the path of a winding flyer 66. The flyer is rotated by a motor 68 and pulley group 70. The assembly 54 also includes a mechanism 72 for controlling the jump assembly 64 and a tape reader 74. The mechanism 72, the flyer 66 and the tape reader 74 are coupled, via the pulley group 70, to the drive motor 68 to provide a direct mechanical relationship between rotation of the flyer 66 and stepping of the coil form 62. A stripper assembly 56 comprises a rod 78, actuated by a cylinder 76, whereby a stripper plate (79), Fig. 6 (not shown), pushes the coils from the coil form into a coil receiving assembly 60. A wire clamping assembly 58 is interposed between the assemblies 52, 60 and includes a pivotally mounted frame (80), Fig. 3 (not shown), in which is located clamp means 84. The clamp means holds one end of the wire 86 adjacent the coil form when the winding flyer 66 begins its rotation and an opening 85 in a masking plate 82 in the frame (80) allows the coil form to pass therethrough so that the edge of the opening controls the oscillation of the wire 86 during winding. The coil receiving assembly includes a rotatable magazine 88 which receives the wound coil groups at their correct angular displacement. A foot valve 477 actuates a cylinder 398 to operate latching means releasably mounting the magazine on a shaft. Alternatively the latching means may be operated by a valve in a valve bank 338. The shaft is rotated by a rack 406 and pinion 402 and index plates 422, 424 are also mounted on the shaft. Pawls 440, 442 engage in notches in the plates 422, 424 and are selectively actuated by a spring clip 446. The rack is driven upwardly by a cylinder 408 and a horizontal rod thereon disengages the pawls, rotation of the magazine shaft being prevented by a uni-directional clutch. Upon downward movement of the rack, the plates are rotated until a pawl engages in one of the notches. Plate 422 has six notches and plate 424 has four notches and are used respectively for six-pole or two- or four-pole windings. Operation of apparatus.-At the beginning of the winding cycle, the frame 80 is lowered with the upper peripheral edge of the opening 85 closely adjacent the first coil forming station of the form 62, an end of the wire having been threaded over a guide in the flyer head 120 and clamped in the clamp 84. The magazine 88 in the receiving assembly 60 is then advanced adjacent the masking plate 82. A switch 302 is closed, causing the tape reader 74, to signal the drive motor 68 to rotate and a clutch 304 to engage to rotate the pulley 216, thereby rotating the flyer head 120. When about six or ten turns have been wound, the clamp 84 is released and the frame 80 raised, these operations being controlled by the tape reader 74. The wire is wound on to the inclined arcuate surfaces located between the stepped cylindrical surfaces of the form and are forced forwardly on to the latter by succeeding turns. When the coil has been wound the tape reader actuates a solenoid 260 which drives forward a pin 254 mounted in an oscillating arm 248. The movement of the arm 248 is generated by a linkage 252 actuated by an eccentric on a shaft and driven by the motor 68 via the pulley group 70. The pin 254 engages a trip arm 238 and disengages it from a yoke 234, which is then free to be driven forwardly by a cylinder 228, thereby advancing a yoke tube (148) lying within a spindle tube 134 and connected to the coil form 62, Figs. 4, 4a (not shown). The coil form is stepped forwardly so that the next inclined surface is in the winding plane when the flyer arm is in the lower portion of its cycle. A coil is then formed at this station and the procedure repeated until an entire coil group has been wound. The tape reader then signals the clutch 304, declutching the motor 68 and engaging a gear motor 306 to the output pulley 216. The motor 306 rotates at a much slower speed than the motor 68 so that the output pulley 216 and thereby flyer head and shaft 218 are slowed down. The tape reader again signals the clutch 304 to disengage it and when a slit 300 in a disc 296 of a proximity switch 294 is aligned with a sensor 298, a brake 308 is energized to stop the output pulley, with the flyer arm located slightly off top centre. A bevel gear drive 290, 292 provides the mechanical co-ordination between the tape reader and the drive and control assembly 54 to ensure that the coil form is indexed forward only when the flyer arm is in the lower half of its cycle. The stripper plate (79) is then actuated to push the coil group into the magazine 88. Additional groups are wound, the polarity thereof determining the direction of flyer rotation and when the required number of coil groups have been developed, a cutter arm 350 is actuated to cut the wire, the magazine being then withdrawn. The magazine is then placed in the tooling section of a conventional coil injection machine and the coils are pushed from the magazine into the injection magazine, Fig. 20 (not shown).