Patent GB-1295428-A (GB)
IPC: B23Q7/00
Filed: 1970-07-02
Abstract: 1295428 Rotary tool heads; transferring workpieces GULF & WESTERN INDUSTRIAL PRODUCTS CO 2 July 1970 [2 July 1969] 32181/70 Headings B3B and B3T  In a machine for manufacturing tubular workpieces such as cartridge casings, in which casings carried by an endless belt 18 from a work receiving station to a machining station 14 are successively supplied to machining heads 32, at the machining station, are carried on a rotary turret member 26, the machining heads 32 are in the form of rotary cutter heads into which the cartridge casings are introduced by respective feed members 160. Each rotary cutter head 32 comprises a housing 36 in which is rotatably mounted an outer sleeve 46 gear driven 150, 152 from a power source not shown. Within the sleeve 46 is located a tool carrying slide member 62 which is keyed 66 to the sleeve 46 for rotation therewith but which is axially slidable within the sleeve. A further member 136 is located concentrically within a part 72 in the slide member 62 is biased upwardly by a spring 144 to locate a cartridge casing support portion 140 in an extended position. The cutter slide member 62 is similarly biased upwardly by a spring 98 acting on a rod member 84 concentric with the member 62 and secured thereto. The cutters 106, 108 are mounted at the upper end of the member 62 in guides which are transverse to  the axis of rotation of the sleeve 46, the outer ends of the cutter holders 102, 104 engaging a cam surface 132, 126 respectively so that axial displacement of the cutter slide ducting machining effects transverse displacement of the tools. In operation, the flexible belt 18 passes around three turrets, a feed turret 12 where the cartridge cases to be machined are received and inserted into clips 70 in the belt, the machining turret 14, and turret 10 where the machined eases are ejected. The cases 22 in the belt 18 arrive at station A on the turret 14 and are aligned with a machining head 32 and whereat in accordance with a cam 164 a slide 160, having a work gripper 170, moves into the casing 22 on the belt as the turret with the slides 160 move through the stations A to G, the cartridge casing being displaced from the belt by the gripper 170 into the machining head against the support 140 which is depressed against the spring 144 to engage the bottom of recess 138 in the part 72. This movement effects the axial alignment of the casing 22 in the head 32 and further axial displacement of the slide 160 with gripper 170 displaces the rotary tool slide 62 within the sleeve 46 against spring 98 and machining of a groove in the cartridge casing is effected by the cam controlled transverse displacement of the cutters 106, 108. At station G gripper 170 permits re-engagement between the belt and the casing 22 which is subsequently moved to the turret to where the casing is ejected. The gripper 170 on the slide 160 is in the form of an expandable mandrel which grips the internal surface of the cartridge casing and which comprises a relatively axially displaceable sleeve 176 and rod 184 with co-operating annular spring elements 192, 194 at one end. The rod and sleeve are passed by a spring 188 to effect collapse of the elements 192, 194, but when the rod end 190 which in operation is located in the bottom of the cartridge casing, engages the support part 140 the rod 184 is displaced axially on the sleeve 176 and the elements 192 are expanded radially to grip the cartridge casing.