| 摘要 |
1,227,837. Heading cartridge cases; making hollow ware; forging. E. W. BLISS CO. 12 Nov., 1968 [12 Dec., 1967], No. 53575/68. Headings B3A, B3H and B3Q. [Also in Division B8] A press comprises an endless flexible helt providing spaced work-receiving openings aligable with a punch and die for feeding work to, or discharging it from, the press. Cans or pencil casings may be formed in the press or, as shown, it may be placed in a production line, Fig. 1, for making cartridge casings. The line includes a hopper A feeding cup-shaped blanks 12 to a vibratory bowl 14 which transfer them to apparatus B where they are inserted in a belt conveyer 44 feeding a rotary-turret, deepdrawing press C. A second belt conveyer 90 discharges the press C and transfers the workpieces 12a to a similar press D preferably for re-drawing. A third conveyer 104 discharging press D feeds the work to a further rotary-turret press E for heading the cases and tapering their walls, to an induction annealing plant F and to apparatus for discharging the cases for subsequent processing. The inserting apparatus B comprises a vibrating pan 24 for placing the blanks in pockets 32 in a rotary table 30 from which they are ejected by cam-operated plungers (34), Fig. 2 (not shown), into openings 49 in plastics clips 48 riveted or bonded on the stainless steel conveyer belt 46, which is driven by a member (42), Fig. 4 (not shown), beneath the table 32. If the base of a blank is uppermost in a pocket 32, the blank will be ejected through the clip 48 by the plunger (34). Deep drawing.-The press C, Fig. 5, includes a stationary cam 86 for operating the punches 82 as the turret rotates, and a rotary disc 64 carrying the drawing dies 68. Upper and lower rotary driving discs 60, 98 have pockets 62, 99 and pins 93 for engaging the feed and discharge belts 44, 90, the punches 82 transferring the blanks 12a between the belts during the drawing operation. A similar transferring operation occurs at the re-drawing press D. Heading and tapering.-The press E, Figs. 6 and 6A, is similar to the other turret presses, having an additional stationary cam 124 for operating a lower impressing punch 134. After the blank has been gripped between the upper and lower punches 130, 134 at station 2E, the conveyer 104 loops away from the turret leaving space at station 3E for the tapering die 144, Fig. 6 and Fig. 7 (not shown). The punch 134 is now raised to complete the heading operation and the conveyer 104 rejoins the turret to remove the headed case and transfer it to the annealing stage. Springs (138, Fig. 7) above the punches 130 free the cases from the dies 132. Gauging, pickling and washing operations may also be performed, and the work may be carried in holes in the conveyer belts themselves. |
