GB779040A - Improvements in or relating to piercing and chamfering machines - Google Patents

Abstract

779,040. Making wheel rims; punching; countersinking. KELSEY-HAYES, [formerly KELSEY-HAYES WHEEL CO.]. Aug. 29, 1955 [Oct. 11, 1954], No. 24781/55. Classes 83 (2) and 83 (4). In a machine in which wheel rims passed along a guide are operated upon by spaced punching and chamfering devices which punch and chamfer a hole, e.g. a valve stem hole, in each rim, movable stops locate the rims in the punching and chamfering positions and a transfer device moves each rim from the punching to the chamfering position and holds each rim against rotation during movement. The rims slide on bars 3 down an inclined table 2 between guides 4, one of which is laterally adjustable, until the first rim engages a stop 27 and simultaneously actuates a switch 64, whereupon liquid is supplied to double-acting cylinders 18, 38 actuating the punching and chamfering tools, respectively. The punching device, Fig. 4, is similar to that of Specification 758,503 and comprises a channel member 6 pivotally mounted on a bracket 22 laterally slidable on the table 2, bolts 24, 25, 26 serving for adjustment and fixing. A yoke 7 slidably mounted in the channel member 6 is urged by a spring 12 against a stop 16 and carries the punch 8 which co-operates with a die 10 secured to a piston 20 in the cylinder 18 on the lower arm of the yoke. The chamfering device, Fig. 5, is similar to the punching device, but has a countersinking punch 33 on the piston and a recessed die 34 on the upper arm of the yoke 36. The punching and chamfering devices are operated and released simultaneously. Meanwhile, a clamp 48, Fig. 6, comprising pivoted geared jaws 55, 56 is operated by a compressed air cylinder 62 to grip the edge of the rim being punched and the stops 27, 42 which are operated by compressed air cylinders 29, 44 are lowered. A compressedair cylinder 49 then moves a slide carrying the clamp 48 longitudinally of the guides 4 to transfer the rim to the chamfering station and the stops 27, 42 are raised. The clamp 48 is returned to its normal position and the operating cycle is automatically repeated when the next rim actuates the switch 64.