Patent GB-1442603-A (GB)
Title: Apparatus for assembling components particularly cartridge fuse components flame-ret'''''''-'''''''' 'n'ustries ltd
IPC: B23P21/00
Filed: 1973-01-09
Abstract: 1442603 Turret machines for making cartridge fuses BADALEX Ltd 21 Dec 1973 [9 Jan 1973] 1087/73 Heading H1J A turret machine for making cartridge fuses comprises a main assembly turret 31 and a sub-turret 70. The turret 31 comprises an annular plate 36 mounted on a hollow shaft 33 for rotation on a housing 30, the plate having a forwardly projecting annular flange 37 which supports a series of radially outwardly projecting tubular guides in the form of hollow needles 39. Corresponding to each needle 39 is a spool 42 of fuse wire 43, the spools being mounted on an annular plate 40 at the opposite end of the shaft 33 from the plate 36 and the fuse wire being fed from each spool through the shaft and through the corresponding needle under the control of a block 45a, the wire being gripped between the block and a leaf spring 45. The block is carried by a radially slidable rod 45b which is biased outwardly by a spring 37b and abuts a cam track 37c fixed to the front plate F of the housing 30 and extending circumferentially around the turret. The turret is indexed by a cam 51 engaging rollers 49 carried by an annular flange 48 on the shaft 33. At station 1 a bottom fuse cap 54 is fed on to needle 39a and is pushed to the bottom of the needle by a pusher P at station 2. In passing from station 2 to station 3 the cap 54 passes under a cam track 55 which also extends circumferentially around the turret and holds the cap axially of the needle. At station 3 a ceramic insulator body 56 is fed on to the needle whilst at station 5 the body is gripped by jaws 58 and an outer fuse cap 57 is forced on to it. At station 6 the cam track 37c starts to diverge radially outwardly so that movement of the rod 45b advances the fuse wire 43 through the needle so that the end projects a short distance beyond the free end of the cap 57. At station 7 a reciprocated member 60 bends the projecting wire over the lip which bounds the aperture in the cap 57 while the cap is engaged by a support member 61, the wire being soldered to the cap at station 10. At station 14 the body is engaged by jaws 63 which pull it clear of the needle, and at stations 17 and 18 it is immersed in a fluidized bed of sand in a vertically reciprocatable container 65 so that the space between the fuse wire and the body is filled with sand. At station 19 the cam track 55 has diverged sufficiently to permit cap 54 to pass along the needle and be forced on to the body by jaws 66, 66a, the body being held by jaws 67. At station 21 a guillotine 68 severs the fuse wire and the fuse slides down a shoot 69 to the sub-turret 70. The sub-turret 70 comprises a rotatable head 73 having radially-directed fuse-receiving recesses 71. A fuse is delivered by the shoot 69 at station A and at one of the stations B-F the free end of the fuse wire projecting from cap 54 is bent over by a member such as 60. At station G the wire is soldered to the cap, and the fuse is cooled while passing through stations J-L, where it is tested for electrical continuity. At station M the fuse falls to a shoot 82 containing a "flip-flop" gate 83 which directs it to the "reject" duct 84 or "pass" duct 85 as appropriate. The apparatus used at the various stations is described in detail in the Specification.