Patent GB-253132-A (GB)
Title: Improvements in or relating to the riveting of rims to wheel discs or the like
IPC: B21J15/26
Filed: 1926-06-03
Abstract: 253,132. Budd Wheel Co., (Assignees of Board, E.). June 3, 1925, [Convention date]. Wheels.-Rims are riveted to wheel disc flanges by automatically-controlled punching, rivet-feeding and riveting operations, the punching being completed on the first revolution of the work carrier and the feeding and riveting after an additional revolution of the work carrier corresponding to the arc separating the feeding and riveting positions from the punching position; the work-piece or the tool are kept freely floating during the punching and riveting operations to prevent deformation of the work. The punching-mechanism P and riveting- mechanism R are arranged at opposite sides of the work carrier C, and the rivet-feeding mechanism F between them. The annular boss 20 of the wheel disc, Fig. 7, is slipped over a boss 26 on the head 17 of the wheel carrier, and is securely clamped by a pneumatic cylinder device 47 the piston 53 of which actuates a rod 35 having at its forward end a pin engaging a spiral groove in a sleeve 37 keyed to a disc 34, the latter being thereby rotated so as to project a number of fingers 28 behind the wheel boss and clamp the wheel firmly in position. The carrier C is rotated step by step by the mechanism shown in Fig. 12. The shaft 10 of the carrier has a flange 56 to which is secured a notched disc 57 rotated intermittently by an arm 60 and pawl 61 actuated by a cam 69 and slide 66 through link 65, arm 64 and link 63. A spring-mounted roller 73 and a spring plunger 72 hold the wheel against movement in the intervals of its stepwise rotation. The punching-mechanism, Fig. 8, comprises a die 89 on the end 92 of an arm 94 and a punch 91 on a rod 96 sliding in the arm 94, the punching being effected by the toggle 98, 99 and pitman 100 actuated by cams 119, 120 on the shaft 121. Adjustment of the punch stroke is made by the taper block 105. The punchings escape from the die 89 through the opening 147 and are led away by a discharge tube 144. The rivet-feeding mechanism, shown in Fig. 14. comprises a hopper 146 in which oscillates about a pivot 154 a trough member 153 serving to lift a number of rivets from the hopper at each oscillation and pass along to the feed trough 147 those head uppermost. From the feed position 160 the rivets are picked up one by one by fingers 178 of the rivet-inserting device carried by a shaft 164 having a combined swinging and up-and-down movement. The fingers 178 are held closed on the rivet by a spring 182 and are opened by contact of the fingers with the wheel rim so that the rivet is dropped into position. The position of inserting the rivets is shown at 188, Fig. 10. The mechanism for oscillating and reciprocating the shaft 164 of the rivet picking up and inserting device comprises two cams 203, 202, Fig. 23, the former reciprocating the shaft through the lever 206 and the latter oscillating it by means of the lever 214 and link 216. Wheel carrier C is mounted on arms 11 on a shaft 12 and for the riveting operation is rocked from the dotted line position, Fig. 10, to the full line position to bring the head of the rivet against the anvil 233 by means of the lever 267 and cam 274, Fig. 6. The anvil 233 and riveting punch 232 are carried by the relatively sliding members 235, 238 and the riveting is effected by the toggle 249, 250 and pitman 254 actuated by an eccentric 259 on the shaft 68. The machine is driven by an electric motor 290 operating a worm shaft 287 engaging two main gears 292 on the shafts 121, 68 of the punching and riveting devices and adapted to be clutched to these shafts by main clutches 293, 294, Fig. 5, operable by hand levers 295, 299 acting through bell-crank levers and shafts 297, 301 or automatically when the wheel clamping pneumatic cylinder 47 is actuated. This automatic operation of the clutches is effected by a pneumatic cylinder 346, Fig. 1, operating a sliding bar 349 carrying a pivoted pawl 355, Fig. 30, which on its upward movement throws over the hand lever 295, thus starting the punch. ing-mechanism. The shaft 189 operating the rivet-feeding mechanism is rotated by worm gearing 303. 304, Fig. 6, from the shaft 287 through a clutch 305 operated by the links 307, 308, 309 from the shaft 297, which latter is connected by a coupling 319, Fig. 26, to the shaft 301. Actuation of the pneumatic cylinder 346 closes the clutches throughout the machine. The shaft 189 of the rivet-feeding mechanism drives by worm gearing 329, 328 a timing disc 314, Figs. 6 and 26, which makes a single revolution whilst the wheel makes one and a half revolutions, the period from the punching of the first hole to the riveting of the last rivet. Disc 314 carries two dogs 315, 317, the former adapted to operate an arm 316 on the shaft 297 and the latter adapted to operate an arm 318 on the shaft 301. Fig. 26 represents the disposition of the timing disc 314 at the commencement of the operation of the machine. After the disc has rotated through 240‹, corresponding with rotation of the wheel carrier through 360‹, dog 315 strikes arm 316 and opens the clutch 293 of the shaft 121 driving the punching-mechanism, which latter then ceases to operate. The rivet-feeding and riveting-mechanism continues in operation throughout a complete revolution of the disc 314, corresponding with one and a half revolutions of the wheel carrier, the dog 317 then striking the arm 318 on the shaft 301 whidh opens the other clutches and brings the whole machine to a stop. All the operations of the machine are automatic except for the placing and removal of the wheel on the carrier and the actuation of the pedal 335 controlling the admission of compressed air to the wheelclamping cylinder 47 and the clutch-actuating cylinder 346.