GB1447570A - Manufacture of rollers for use in roller chains - Google Patents

Abstract

1447570 Making roller chain rollers CESKE ZAVODY MOTOCYKLOVE NARODNI PODNIK 4 Dec 1974 [22 Dec 1973] 52481/74 Heading B3A A machine for manufacturing rollers for roller chains from flat strip 54, Fig. 1, comprises a guide bed along which the strip is fed into the machine, a cut-out punch 16 and an associated cutting die 47 for removing a blank from the strip material, a broach 11 and an associated drawing die 48, a piercing tool 25, an upsetting tool 26 and a cutting tool 38 for acting on a blank to produce a finished roller, the cut-out punch, broach, cutting die and drawing die being coaxially mounted along a common axis, and the piercing, upsetting and cutting tools having a common axis spaced from and parallel to the common axis of the punch, broach and the dies. The strip is fed into a recess 45 of the machine where punches 16, controlled by a pressing plate 14, cut through the strip to form blanks which are shifted to the drawing die 48. Broaches 11 form the blanks into preformed roller cups 55. The piercing tools are moved downwards with a plate 15 and move the cups 55 into the upsetting dies 37 where they strike the cutting tools 38 as the plate 15 moves a plate 27 and the upsetting tools 26 downwards. The piercing tools, punches, broaches and upsetting tools are moved upwards following piercing of the cups. A feeder 52, Fig. 3, moves the cups between guides towards the piercing tools and finished rollers fall into a reservoir (not shown) and the cycle is repeated. The piercing tools are actuatable through action of a hammer on shock blocks 12 to cause contact of pulleys 13 with pulleys (21), Fig. 2 (not shown), mounted on pivotable forks (19). Such action causes lowering of a plate 23 relative to a body (18) provided in a recess (17) of the plate 15.