Patent GB-265822-A (GB)
Title: Improvements relating to the bending, forging, shaping, cutting and like treatment of metal sheets, pipes, bars and the like
IPC: B21D5/14
Filed: 1926-05-03
Abstract: 265,822. Hume, W. R., and Hume Steel, Ltd. May 3, 1926. Angular bending; tube expanders; corrugating; rolling tubes; shearing.- Bending, forging, shaping and cutting metal sheets, bars, pipes &c., is effected by a combined percussive and rolling action imparted to the work by a freely rotatable forming member mounted on an eccentric portion of a positively driven shaft. In bending a strip 6, Fig. 3, to form a pipe collar for use in joining pipes, the strip is bent step-by-step between a shaped anvil 7 and a roller 2 which is freely rotatable on an eccentric or crank pin 3 projecting from a power-driven shaft 4. The anvil may be held by bolts 16 and may be adjusted by packing strips 15, and lateral work guides 14 may be provided. In another form, for making pipes, the driven shaft may be mounted in bearings at 'both ends, a long roll being freely rotatable on an eccentric intermediate portion thereof, the anvil being supported on screw jacks. The outer bearing may be movable on a pivot so as to facilitate removal of the pipe. In a modification of this form, separate shafts with crank pins are mounted in the end bearings and are connected by gearing. The crank pins engage recesses in the ends of the roll, which may be slightly tapered from its ends towards an enlarged centre to avoid the roller bending when it is long and small and is acting on thick plates. The shafts may be withdrawn longitudinally so as to permit removal of the pipe. In forming an internal rib 21, Fig. 4, in a pipe collar for pipe joints so as to facilitate ramming of the jointing material, a roll 2 is provided with a groove 17 co-operating with a curved rib 18 formed on or secured to the anvil 7. In expanding the ends of pipes into faucet formation, a shaped roll 2, Fig. 6, freely rotatable on the eccentric end 3 of a shaft 4, driven by gearing 27 from a shaft 28, co-operates with a similarly shaped anvil supported by jacks 23. The pipe is supported at one end on a roller support 39 and at the other end on a shaped bearer 3 which is pivoted at 33, passes through a slotted guide 37 and is adjustable by a screw 34 with a ball and socket connection 36. The pipe may be rotated by hand, being furnished with a detach-' able ring having hand pieces 40<a>. The ends of pipes may be flared out prior to forming faucets, by a number of rolls 2, Fig. 15, freely mounted on the eccentric ends 3 of shafts 4 connected together by gearing. The adjacent shaft bearing may have a self-centering bearer comprising a series of radial vanes 46. The pipes may otherwise be supported as in the form shown in Fig. 6. A tube 26, Fig. 12, may be swaged to a smaller diameter by feeding it between a pair of rolls 2 freely rotatable on the eccentric ends 3 of a pair of driven shafts 4 connected together by gearing. Plates may be severed by a pair of discs 2b, 52, Fig. 16, the disc 2<b> being secured to a roller 2d freely rotatable on the eccentric portion 3 of the driven shaft 4, and the disc 52 being secured to a roller 56 freely rotatable concentrically on a spindle 57. The disc 52 may be replaced by a stationary cutter. In a modification, the lower disc may be replaced by a work table with a slot in alignment with the edge of the disc. The motion of the disc may be retarded by a brake to overcome the dragging effect on the work as the disc moves into and out of engagement therewith.