Patent GB-134088-A (GB)
IPC: B21K15/02
Abstract: 134,088. Martin & Co., J., and Glynn, D. F. Nov. 27, 1918. Bending and forging horseshoes; bending dies and formers; forging-dies.-In a machine particularly suitable for bending and forming horseshoes, the cycle of operations commences with the release of a heated blank from a feed-magazine by a gate operated by a reciprocating slide. A former-die is mounted on this slide, and, during its forward movement, the blank is bent round the die by means of rollers controlled by formerguides. Other reciprocating slides then move forward to cause enclosing-dies to close round the bent blank on the die, whereupon a vertical slide carrying a face-die descends and forms the fullering grooves while finally shaping the shoe. After the withdrawal of the face-die and the enclosing- dies, the former-die is raised from its bed-plate, and, during the return movement of the slide carrying the former-die, pawls engage the shoe and propel it down an inclined shoot into a delivery shoot. In order to form a clip on the shoe, there may be provided a clipping-tool actuated by a former-guide carried by the slide and adapted to displace the metal to form the clip, a clipfinishing tool carried by the face-die or by the slide forcing the displaced metal into a recess in the former-die. In a modified form of machine, the former-die is fixed, the heated blank is released from the feed-magazine on to the bed of the die, and rollers carried on a reciprocating slide bend the blank round the die. Subsequently, these rollers are withdrawn, and enclosing-dies come forward and shape the blank round the die. After the withdrawal of these enclosing-dies, the face-die descends and, while enclosing the sides of the die to shape it, forms the fullering-grooves. A separate cam-actuated ejector removes the finished shoe. In the first form of machine, the former-die 44, Fig. 2, is mounted on the slide 32. The feed-magazine, which is described below, places a blank across the slide 32, between the die 44 and the rollers 52. As the slide is moved forward by the action of the cam 15 and lever 16, the rollers 52, which are controlled by the guides 47, bend the blank round the die. The forward movement of the slide 32 is stopped with the bent blank in the position shown in dotted lines, whereupon the slides 36 are moved forward by cams, and the enclosing-dies 54 hold the blank on the die 44. In this position, a face-die 60, Fig. 5, is forced down by a cam finally to shape the shoe, while the tools 61 form the fullering-grooves. The tools 61 are constructed so that the inclination. of the side of the grooves varies progressively from heel to toe. The inclined edge of the die 44 ensures that the shoe is not withdrawn as the die 60 retires; 'but when the enclosing-dies 54 and the die 60 have been withdrawn, the die 44 is raised, as shown in Fig. 16, by the action of a cam on the cam shaft. The stripper plate 55 is brought down by the cam 59 to release the shoe from the die 44. As the slide 32 is withdrawn, the pawls 66 engage the shoe and propel it down the shoot 12 into a delivery shoot. Fig. 23 shows means for forming a clip on the shoe. As the slide 32 moves to the right, the roller 77 engages with the guide 78<a> and causes the tool 76 to strike the blank to displace metal. The tool 80<a> on the face-die 60 subsequently presses this metal into the recess 80<b> in the die-plate 43. The feedmagazine 69 is shown in Fig. 8. On the withdrawal of the slide 32, the former-die 44 withdraws the gate 70 from the magazine, thus allowing the die to carry forward another blank on its succeeding movement. The gate 70 is controlled by the weight 71. In the modified form of the machine shown in Figs. 19, 20, and 21, the die 44 is fixed. The magazine 69<1> is normally closed by the gate 70', but the gate is adapted to be raised by the cam-actuated feed-platform 71<1>, thus placing a heated blank between the former-die 44<1> and the rollers 52'. As the slide 32<1> advances, the rollers 52<1>, guided by the cams 51<1> and guidegrooves 47<1>, roll the blank round the die 44<1>. As the slide 32<1> withdraws, the enclosing-dies 54<1> are actuated by their cams to close on the blank and shape it. These slides also withdraw before the face-die 60<1> descends, this die being shaped to enclose the sides of the blank, as well as to form the fullering-grooves by means of the tools 61'. The removal of the shoe from the die 60' on the withdrawal of the latter is ensured by providing a ston 55<1> on an arm 56<1>, adapted to strike on the rod 59<2> to cause the stripper 68<1> to separate the shoe from the die, thus leaving the shoe on the seating-die 43<1>. This seating-die 43' is raised by the cam-actuated rods 45<1>, and the ejector lever 72<1> is also actuated by a cam to draw the shoe into the delivery shoot 73'. In this form, means for forming the clip comprises a clipping-tool and a clip-finishing tool mounted on the slide 32<1>. The face-die 60<1> may be operated by toggle-arms controlled from the main shaft, instead of by cams.