Patent GB-454887-A (GB)
Title: A combined shearing and planing machine
IPC: B23D19/08
Filed: 1935-07-11
Abstract: 454,887. Shearing and planing machines. BENNIE, H. O., and ORR, R. W., Clyde Engine Works, Drumoyne Road, Govan, Glasgow. July 11, 1935, No. 19796. [Classes 83 (iii) and 83 (iv)] In a combined shearing and plate-edge planing machine the work 1, mounted on a table 2, may be sheared and/or planed with a square, bevelled cr other edge. The table 2 is mounted on a slide bed 3, and a tool-head 4, mounted on a saddle 9, carries coacting rotary shearing cutters 5, 6 and two planing tools 7, 8. The latter are each arranged to cut in one direction. The cutters 5, 6 are mounted on intergeared spindles 10 11 driven from an electric motor on the head. The spindle 11 is also connected through gears 19, 17, 15 to a fixed rack 14 so that when the shears are rotated the saddle 9 travels along the bed at about the same speed as the peripheral cutter speed, any speed difference being corrected by a slipping coupling in the gearing. The upper spindle 10 is mounted in vertically adjustable blocks 20, 21 to set the shears to the required plate thickness. The same spindle is axially adjustable by screw-and-nut gearing to produce either a square or bevelled edge on the plate as described in Specification 425,900. The tool-head is adjusted transversely in the saddle along guides 32, 33 by a hand wheel 27. The planing tools 7, 8 are carried in slides 34, 35 adjustable transversely on guides 52, 53 by screwed spindles 48. The tool 8 is secured in a tilting box 36 on a tool bar 38 by screws 37, the relieving movement being effected against a plunger 40 and the tool bar is pivoted at 42 and is secured in any angular position by a bolt 45 engaging a curved slot in the tool slide. In finishing a plate to a line the shears are set to cut the plate slightly oversize while the planing tools finish the plate to size. Either shearing or planing operations may be performed separately, the tools not required being moved to an inoperative position. For planing a double bevelled edge the two tool bars may be tilted in opposite directions ; in other cases form tools may be used. In another modification the entire tool-head mav be tilted angularly for shearing and planing bevelled edges. In another form the toolhead may be traversed by screw or chain gearing, the shearing cutters being either driven positively or rotated by the work. In some cases two or more tool heads may be employed. In a further modification, Fig. VI, a long fixed shear blade (which may be built up) is secured to the table 2 and the tool-head 4 is guided along an upper bar 56 against which it is held by a counterweight. The tool-head carries a non-driven rotatable shear 5 and is traversed by a chain 60. The planing tools are arranged as described above. In another modification the tool-heads may have cutters arranged as in Fig. II, the lower cutter spindle carrying a chain sprocket engaged by a slack chain anchored at either end of the machine so that when the cutters rotate the chain gearing moves the tool head at a slightly lower speed than the cutter peripheral speed. When the cutters engage the plate the head is dragged along by the friction of the cutters and after completion of the shearing the head stops and the slack in the chain is taken up before the head moves on again to complete the planing operation.