Patent GB-472500-A (GB)
Title: Improvements in machines for rolling the bases of cartridge cases
IPC: B21D51/54
Filed: 1936-03-27
Abstract: 472,500. Rolling. DEUTSCHE WAFFENUND MUNITIONS FABRIKEN AKT.-GES. March 27, 1936, No. 9197. Convention date, March 28,1935. [Class 83 (iv)] A pair of cartridge cases t, u have their bases rolled simultaneously by rotating them against a ball v, the machine performing automatically, by hydraulic or pneumatic &c. controls, in sequence, the operation of moving the two cartridges inwards towards the ball while the ball is moved up to meet them, starting the axial rotation of the cartridges, lowering and raising the ball during end rolling, and moving apart the cartridges. On the drawing the main driving shaft 104 should be shown coupled by sprocket drive to the shaft of the gear x which in turn is coupled by sprocket drive to the shaft of clutch 101. The operator throws over lever 110 on piston d, so opening conduit 7 and opening and moving valve a to the left and then depresses a control button m whereby the pump O supplies fluid by conduits 1 and 2 to a control valve d to engage the main clutch 105, 104. Movement of valve a allows fluid through 7, 8 to cylinder 9 which disengages a catch pin to release control piston g and also through conduits 13, 14 moves valve b to the left whereby conduits 15, 16 convey fluid pressure to the piston moving the righthand cartridge-holding slide inwards. At the same time fluid pressure through pipes 17, 14 moves up piston n and the rolling ball v. Fluid pressure through 15, 19, 20 reverses valve k whereby conduit 21 is opened and valve b is moved to the right so that pressure fluid through 22, 23 moves piston 1 and so closes clutch z. Fluid pressure through conduits 24, 25 moves pistons which strike control rod 106, so engaging clutches y and 103 thus rotating screwed shaft 100 to move the cartridge holders inwards. Fluid pressure through conduit 26, 27 disengages catch pin to release valve a which moves to the centre. Inward movement of left cartridge slide drives disc and the dog p of which forces piston e back so that fluid through 30, 31 pushes rods 106 back so stopping further movement of the slides. Fluid pressure through 30 moves piston 32 thereby switching on a light signal q showing that rolling has begun. When the impulse cylinder at 31 is forced down, pressure through 33, 34 closes clutch 101 to start rotation of the cartridge-holding slides, whereupon pressure through 35, 36 moves valve C to left, connecting 37, 38 to pump O. The piston I is pushed down when a dog on the control disc 108 rotates sufficiently to depress it, i.e. when the ball slide is at the top of its stroke so that fluid through 39, 40 moves control rod 107 to start the ball moving down again. When the ball V has moved down a dog on the disc 108 moves valve h whereupon fluid through 41, 42 and 43 depresses rod 107 and starts the ball moving up again. At the end of the upward movement, throwing over of the control lever 109 moves control valve y so that fluid through 45, 46 moves up plunger 47 so,that the ball slide remains in its upward position, while fluid through 49, f, 50 and 52 moves rods 106, engages clutches Y and 102 to start moving apart the cartridge-holding slides and fluid through 51 switches off the light signal q so indicating the end of the rolling. Fluid through conduit 53, 54 opens clutch 101 to stop rotation of the cartridge holders and fluid to plunger 55 initiates the rapid moving apart of the cartridge holders. Fluid through 56, from valve f, opened by the adjustable dogs on the control disc r, to plunger 57, terminates the movement apart of the cartridge-holding slides. Fluid from 57, 58 and piston 59 disengages catch pin whereby the spring controlled piston valve a moves to the right and fluid through 62 to 63 and piston n moves the rack W of the ball slide down at top speed and fluid from 62-64 opens the clutch at Z. Fluid through 65 moves valve C to right and through 64, 66 moves valve b to left, and fluid from 67, 68, 69 pushes back the piston so stopping the moving apart of the cartridge holders so resetting everything for the next rolling operation on new cartridges.