Patent GB-1086320-A (GB)
Title: Tool changer
IPC: B23Q3/155
Filed: 1964-10-05
Abstract: 1,086,320. Tool-changing. HEALD MACHINE CO. Oct. 5, 1964 [Oct. 4, 1963], No. 40606/64. Heading B3B. [Also in Division G3] A tape-controlled tool changer 40, Fig. 1, comprises a tool storage rack 65, a presenter 64 movable from a selected position over the rack 65 to a fixed position and a tool interchanger 63 located between the fixed position and an operating station, the interchanger being movable vertically and rotationally. The interchanger 63 is mounted on the drilling or tapping head 59 and the presenter 64 is vertically slidable on the rack 65, which is carried by a structure 67 resting on its own base levelled by screws 73. An adjusting screw 79 connects the structure to the drilling machine 48. All of the tool changer movements and tool selection can be controlled from a panel 81, Fig. 5, by push-buttons and selector switches 84 to 96 and 459, and 82 (453, 454) and 83 (475, 476) including a switch 95 for controlling an air-operated spring-closed chuck. Control circuits include solenoid valves controlling pneumatic and hydraulic pressure. The interchanger has a tubular support 136, Figs. 7 and 8, movable vertically by a doubleacting fluid-operated piston rack 143 carrying shock-absorbers 147, 148. An inner sleeve 107 is oscillatable by a fluid-operated rack-andpinion device 151. A central rod 108 is moved axially by a spring-returned piston 164 to rock arms 111, 112 to clamp tool flanges against jaws 113, 114 carried by the sleeve 107. The presenter 64, Fig. 14, is mounted on a plate 189 movable vertically by hydraulic means 72 acting through a chain 68. The presenter comprises a carriage 195 moved transversely by an hydraulic motor 237 and a chain 244, a carriage 203 moved to-and-from the storage rack by a fluid-operated rack-and-pinion and chain drive 218, 221 and a tool-holding socket 206 pivoted by a fluid-pressure operated rack device 212. The vertically-movable storage rack 65, Fig. 16, is formed with sockets 249 and carrie<SP>s</SP> sets of horizontal and vertical recessed bars 256, 257, 265, 266 moved by solenoids to release or retain a tool in the rack. A tool can be removed only when both the horizontal and vertical bars associated with its socket 249 have been actuated. The position of the rack 65 is set initially by supplying fluid to an hydraulic ram (74) to raise the rack, or releasing fluid to allow it to drop, and a catch (344) is then engaged with a stop-block (341) set according to the initiallyadjusted upper position of the drill spindle. On receipt of a signal from the tape concerning the tool to be selected, the presenter is moved vertically by the rod (76) of the hydraulic device (72) towards the correct row of tools. A rack 316, Fig. 23, carried upwardly with the presenter, rotates a gear 317 carrying cams 331 and 323. When a head (77) on the rod (76) actuates a switch, a plunger 324 is released, a switch LS-13 is rendered operative and the rate of movement is reduced. The final position of the presenter is therefore determined by the cam 323 engaging the plunger 324. The presenter is then moved horizontally by the motor 237 and the socket is moved to pick up a tool. Relay logic panels and stepping switches are included in the control apparatus to add a word to the normal eight-word sequential tape format. The word consists of three digits to indicate if a new tool is required, which bank it is in, and which row it is in. Each tool-holder 365, Fig. 29, comprises a socket in which a tool is secured by a set-screw 371 and a keyway. It carries a plastic identification tag 368 and is grooved to receive a balldetent when in the storage rack. It also has a gripping flange 372 and driving teeth 373.