Patent GB-191005584-A (GB)
Title: A New or Improved Machine for Re-making Wire Drawing Dies.
IPC: B21C3/18
Filed: 1910-03-05
Granted: 1911-03-06
Abstract: 5584. Turnbull, N. K., and British Steel and Wire Co. March 5. Planishing and beating. -In a machine for re-working wire-drawing dies, as described in Specification 23,035/09, the hammer is given a spiral or circular motion while the die is stationary or moved in a straight line, to hammer round the eyes or between rows of eyes of largo die-plates. The holder A<1> of the pneumatic hammer is mounted in three eccentric sleeves D, E, F, one within the other, the last being mounted in the framing G. The sleeve F has a gear f in mesh with the gear f<1> on the shaft H which also drives the gear d through floating gears d<8>, d<2>, &c. at a reduced speed. The sleeve E is secured in an adjusted angular position to the sleeve F by a set-screw f<x> to give a sleeve of required eccentricity. The sleeve D may be driven at the reduced speed from the gear d through the clutch teeth d<1> of the feathered sleeve J; or by moving this sleeve down, by means of a hand-lever, the sleeve D may be driven with the sleeves E, F through the clutch teeth e', the former arrangement giving a spiral, and the latter a circular motion to the hammer. The sleeve h<6>, driven through bevelgears h<15>, h<16> from the shaft h<17>, may drive the shaft H by moving down the clutch block h<3> feathered thereon by means of a hand-lever. The sleeve h<20>, rotatably mounted on the shaft H, is driven therefrom at a higher speed through the gears h<24>, h<25>, h<26>, so that the projection h<23> is moved out of line with its recess h<22>, and the sleeve h<6> cannot move up again under the action of the spring h<8> until the sleeve has made one revolution more than the shaft H, during which time the shaft H has made six revolutions and the cycle performed by the hammer is completed. The die B to be operated upon is placed in the holder b<5> and moved below the hammer, so that the pin b<15> through the levers b<14>, b<12>, and b<9> operates a valve b, Fig. 15, admitting air below the piston b<3>. This presses the die firmly against the shoe a<12>, which yields a little by reason of a cushion. ing-ring a<16> and by a pin a<19>, Fig. 15, moves the rod a<20> against a spring to turn the pivoted plate a<21>, Fig. 17, causing the recess therein to act as a fulcrum for the floating lever a<27> so that, if the gearing is started, a cam a<29> on the gear d will be able to cause the lever a<27> to press down the valve a<9> admitting air to reciprocate the hammer during three-and-a-half revolutions of the shaft H, the blows following a path as shown in Fig. 11. When the machine is to be used for hammering in lines, the hammer is arranged to follow a circular path and the automatic valve operation replaced by the use of treadles c<25>, c<27>. The shoe a<12> is replaced by a guide c<2>, Fig. 18, and the holder b<5> by an anvil c reciprocated by a lever c<6> which engages a cam slot c<8> in a drum c' driven through reducing gearing and a band c<18> from the shaft c<17>. The anvil is prevented from rising too far by an adjustable stop c<4>. The path resulting from the motion of the die plate C and the hammer A is shown in Fig. 20. At the end of each reciprocation of the anvil c, the plate C is moved sideways by hand so as to operate between the next rows of holes.