Patent GB-247772-A (GB)
Title: Improvements in or relating to machines for rolling discs
IPC: B21H1/02
Filed: 1925-03-31
Abstract: 247,772. White, A. E., (Budd Wheel Co.). March 31, 1925. Rolling discs. - A machine for rolling discs especially to a tapered and slightly dished formation comprises a rotating table 1 on which the disc blank B is placed and rollers 2 which descend on the blank and move outward from the centre of the disc and are then raised clear and returned to central position ready ior the next rolling, such operation being semi- or fullyautomatic. A new blank B is fed and displaces the finished disc A by a hand operated device, Figs. 18 and 26. The blank B held between gripping arms 307 and centred by a spring pin 314 is swung horizontally about pivot 301 until it squeezes its way between the table 216 and the finished disc A and so raises the disc A until its edge is engaged by a knob 315. The handle 317 is then jerked down thereby raising the arm 307 about its horizontal pivot 306 and lifting the finished disc A clear of the centre pin 218. Further horizontal swinging pushes aside the disc A and slides the disc B over the pin 218 until its centre is above the pin. The handle 317 is now jerked up bringing the disc down in position over the pin 218 which pushes the pin 314 out of the hole and allows the frame to be swung back. The rollers are provided with a conical outer face a cylindrical rolling face and an undercut trailing edge. The removable die plate 3 on the table is slightly dished to taper the blank. The rollers 2 are. mounted in a frame 33 which slides down on vertical guides by movable, hydraulic cylinders 80 mounted on the frame and supplied with pressure fluid through piston valve 104 operated through linkage by a hand lever 110, Fig. 1. The blank is clamped in position on the turntable 1 by a spring pressed rod 132 with thrust ball bearings mounted in the sliding frame 33. The pass is regulated by adjustable stops on the verticle guide of the sliding frame. When the pass is set. and the table 1 is rotating, movement of the hand lever 125 opens piston valve 121 and moves hydraulic piston 71 which through links and a bell crank lever 65 moves the rollers radially from the centre outwards, to roll the blank. At the end of the outward roll travel a stop 115, Figs. 1 and 3. engages a piston valve linkage and cuts off the fluid supply from the larger side of the piston so that the cylinders 80 are raised and raise the frame 33. The rollers are moved in automatically by a bell crank lever on the rising frame engaging a stop 129 which closes piston valve 121 and allows the constant pressure fluid on the smaller side of the piston 71 to return the rollers quickly to central position ready for a repeat operation. The table is cooled by water discharging from a pipe 24, Fig. 4, into the hollow of the die plate 3 and discharging from a chamber 26, Fig. 3, through a pipe 27. A stationary cross piece 25 prevents swirling. The rollers 2 are cooled by water pouring from the ends of shaft 42 to hollows in the rollers and then pouring into a draw off chamber 55, Fig. 4. Fluid pressure is supplied to storage tanks 94 from a force pump 92 operated by bevel gearing from a driven shaft 23. The machine may also be entirely automatic in which case the hydraulic apparatus is dispensed with and the various movements are started and stopped by a series of cams. An electric motor keeps the table 211 rotating through belt drive clutch and bevel gear. A second motor 255 fixed on the framing drives a cam shaft 267 through beit and hand-engaged clutch with brake and worm gearing. The rollers 236 are mounted in a carriage 224 whose weight is partly balanced on springs 327, Fig. 10. The carriage 224, Fig. 16, is provided with upper toggle links and knuckle pieces 284, 282 and a rocking lever 292 acted on by the cam 297 to reciprocate the carriage vertically on guides, which are provided with renewable adjustable stop collars 228. The roll carriers slide in a groove in the carriage and are moved in and out by cams 279 and 280, Fig. 12, operating through a rocker and an adjustable link and bell crank lever system 251. The whole cam system moves with the carriage 224 such movement being permitted by the belt drive 257.