Patent GB-551518-A (GB)
Title: Improvements in or relating to header or upsetting machine
IPC: B21K27/06
Filed: 1941-10-29
Abstract: 551,518. Upsetting-machines; making balls. WILCOX, R. L., and WATERBURY FARREL FOUNDRY & MACHINE CO. Oct. 29, 1941, No. 13908. [Classes 83 (ii) and 83 (iv)] In a heading-machine the cut off block receives the fed wire at plane C, Fig. 4, rises to plane B when a pusher ejects the blank to a transferrer which carries or slides it to the heading die at plane A. By this arrangement the slide and transfer movements are shortened and the machine may run faster. The machine is stated to be applicable for making balls. The wire 39 is fed step by step as limited by a stop 42, Fig. 6, through a hole 41 in the back plate 36, two part gripping-die 38, and cutting-off dies 28, 18 the latter being mounted on the slide 17. A plunger 49 acts on the dies 28 so that the wire is clamped against back feed during cutting-off. After cutting off, the slide 17 raises the blank to the position shown in Fig. 6 at which the blank is ejected by the reduced end 53 of the rod 82 into transfer fingers 79, that locate the blank in line with the heading die 15 into which it is pushed by the punch 13 the fingers 79 returning before the end of the heading stroke. The slide 17 is actuated to cut off by a cam 19 on the shaft 20 and is returned by a spring 31 on a rod passing through a lug 30 on the slide and carried by the die blank 14, the lower position being determined by lock nuts 33. The roller on the lever 21 is kept in contact with the cam by a spring plunger similar to that 51, Fig. 4, for the lever actuating the plunger 49. The lever 21 acts on the slide 17 through an abutting yoke 26 pivoted to the end of a pin 24 secured in a bush 23 screwed into the lever to provide adjustment for the upper position of the slide. The ejector rod 52 has clamped to it a block 54 having a pin 55 engaged by a slit in a member 62 hinged to a cam lever 58. A spring 63 normally holds the member 62 in operative position in which a pin 64 on it engages a notch in the end of the cam lever to prevent relative lateral movement. Pressure on the end of the pin 64 disengages the member 62 from the pin 55 to permit the rod 52 to be withdrawn. Two or more positions, 65, 66 are provided for the fulcrum pin for stroke adjustment and a spring plunger 121 takes up backlash. A rock arm 68, Fig. 3, has a groove in which is adjustably mounted a carrier 69 to which is hinged at 72 a lever arm 73, normally held at the bottom of the groove by a leaf spring, and provided with a pin 75 on which swivels a block on the end of the rod 78. The transfer fingers 79 are carried by this block. The spring mounting of the arm 73 permits yielding in the event of faulty operation. The rod 78 is pivoted to a lever 90 hinged to a lever 82 adjustably connected to a lever 81 at 87. The levers carry rollers engaging cams 84, 86 and the lever 82 has an arm 77 carrying a slip screw to engage a fixed abutment to limit the motion of the fingers in one direction. The levers 90 and 82 are further connected by a rod 92 passing through lugs thereon and carrying an adjustably loaded spring 93, a set screw determines the relative position of the levers and controls the position of the fingers in the other direction. In a modification the transfer fingers are carried by a bar sliding in a fixed guide.