Patent GB-684430-A (GB)
Title: Improvements in swaging machines
Inventor: SIMPSON HAROLD
IPC: B21J7/16
Filed: 1950-07-10
Abstract: 684,430. Forging-machines. NATIONAL STANDARD CO., Ltd. July 4, 1951 [July 10, 1950], No. 17189/50. Class 83 (iv). A swaging machine for rings or long lengths of material which cannot be inserted endwise between the dies comprises a rotating head carrying radially movable dies and having a slot whereby the material to be swaged may be passed from outside the head to its centre, .the dies being actuated by cam means supported by a split ring which provides a gap through which the material may be passed from outside the ring to the rotating head. In one example a rotating head 65, Fig. 3, having a radial slot 70 for the insertion of the work is supported on bosses 69 by bearing pillars 64 having a slot 84 with which the slot 70 is aligned each time the rotating head 65 is brought to rest. The head 65 is driven from a pinion 80 through a pair of pinions 79, Fig. 5, engaging a toothed gear-ring 77 on the rotating head and having a slot corresponding to the slot 70, the pair of pinions 79 maintaining a continuous drive. The pinion 80 is driven through a pin and latch clutch by which the head 65 is brought to rest in the required position. Radially slidable dies 73 in the rotating head 65 are actuated by rollers 75 supported inside a split ring comprising parts 48, 49 supported in housing members 45, 46 pivoted on a hollow pin 47 to the machine base 44 and which are separated for removal or insertion of the work by pneumatic rams 62, 63. The parts 45, 46 are clamped together at the upper end by a toggle clamp actuated by a ram 53 which rotates a crank 54 pivoted on the part 45 to apply tension to a bolt 56 and, on release, throws the bolt clear of the part 46 by rotating an arm 58 as the crank 54 continues its movement. The dies 73 are engaged by the rollers 75 through hammers 71 with curved ends 74, the hammers being held clear of the work when the parts 48, 49 of the ring are separated by springs 89 engaging flanges 87 on the hammers 71. Adjustment of the dies may be made by the insertion of shims between the dies and hammers. The work is fed through the dies by reciprocating clamping means 93 in front of and behind the machine and moving on bases 94. Pneumatic rams (not shown), mounted in the machine base 44 operate work-gripping jaws 95 through a pushrod 98 and toggle mechanism 96 and a single pneumatic ram moves the clamping means 93 to feed the work by rotating toothed quadrants 99 pivoted on the machine base 44 and engaging racks 100 on the underside of each clamping means. In a modification only one of the halves 30, Fig. 2, of the split ring is pivoted for separation and the other half 29 is integral with the machine base 34 and the toggle mechanism is replaced by a simple nut and bolt 32. The rolls are also replaced by fixed cylindrical cams 39 embedded in the split ring 28, the hammers 36 for the dies 17 having rollers 37 on the outer ends for engagement with the cams 39. In another modification the whole of the machine casing 3, Fig. 1, is integral with the machine base 5 and supports a split ring 1, slots 2, 4 in the ring and casing permitting insertion or removal of the work. The rotating head 11 is supported on bearings 12 in coverplates 7 which are bolted through holes 6 to each end of the casing 3 and have radial slots 8 coincident with the slots 2, 4. Rollers 20 are inserted between the rotating head 11 and split ring 1 and are supported in a split cage 19 subtending an angle of approximately 300 degrees at its centre. The rotating head is oscillated through an angle of 100 degrees by a crank 25 connected to a sector 22 engaging a toothed quadrant 21 on the rotating head. Pins 26 on the cover-plates .7 prevent the cage 19 from slipping into a position in which it fouls the slots 2, 4. In a further modification, Fig. 7, a rotating head having a single hammer is used, the hammer engaging a radially movable die 107 which is backed by a fixed die 106. Three or more radially disposed hammers may alternatively be used in the rotating head. The machines 'are suitable for swaging a joint between two ends of a length of wire in making bead wires for tyres according to the method described in Specification 679,498. The Provisional Specification refers to a machine similar to that shown in Fig. 3, in which the rollers are separated by auxiliary rollers and are prevented from axial movement by flanges on the split ring 48, 49 or on the revolving head 65.