| 摘要 |
962,750. Machine tool details; nut runners. AMERICAN MACHINE & FOUNDRY CO. July 7, 1961 [July 15, 1960], No. 24702/61. Headings B3B and B3N. [Also in Divisions B8, F2 and G3] A device for manipulating a workpiece or for controlling the operation of machine tools such as presses and lathes is controlled from a programme on a tape recording and comprises a base 70, which may be wheeled, supporting a column B which is rotatable about a vertical axis and along which a carriage C is movable, the carriage C supporting an arm A which is movable horizontally with respect to the carriage and which is provided with a gripper device G. The column B is rotated by operation of a pair of hydraulic rams 90, the pistons of which are interconnected by chains 82 passing round sprockets on the column. The carriage C is provided with rollers engaging triangular cross-section rails 220 and is raised by operation of a pair of aligned hydraulic rams the pistons of which are secured to a yoke 150 carrying a sprocket, Fig. 15 (not shown), which engages a rack 156, secured to the column B, and a rack 158 suspended from the carriage C. The arm A comprises a tubular member 228 supported by rollers on the housing 162 of the carriage C and provided with a rack 234 which is engaged by a pinion 246 slidably mounted and keyed to a drive-shaft 248. The shaft 248 is connected by gears to a pair of racks, Fig. 16 (not shown), which are reciprocable under the action of a pair of interconnected hydraulic rams. Grippers.-The gripper device G, Fig. 37, comprises jaws 324, 326 attached by bolts 328, 340 to arms 330, 342 which are secured by bolts 332, 344 to meshing pinions 334, 346 mounted on a plate 336 in a housing 348 at the end of tubular member 228. The jaws are opened and closed by a rack 354 which engages the pinion 334 and which is reciprocated by an hydraulic ram mounted within the member 228. A further rack, slidably mounted within the member 228 engages a pinion which is secured to the plate 336 and which is coaxial with pinion 334 so that reciprocation of the rack rotates the housing 348 about the axis of pinion 334. The jaws are also rotatable about the longitudinal axis of the tubular member 228. To programme the device, a detachable handle H is rotatably mounted on the top of the column B and is provided with a hand lever 644 which is movable vertically, and is mounted on a universal joint and which is associated with potentiometers which actuate the servo valves controlling the movements of the device and which record the programme on a magnetic tape. The device is thereafter controlled from the tape through an error detection system. |
