| 摘要 |
1,173,980. Machine tool details. KEARNEY & TRECKER CORP. 21 Nov., 1967 [21 Nov., 1966], No. 52845/67. Heading B3B. [Also in Division F2] A machine tool comprises a tool magazine 35, a pivotable tool changing arm 48 for transferring tools to and from the magazine and the tool spindle 42, and keys and keyways 45, 46, 55, on the tool holders, magazine tool sockets and spindle, for ensuring that the tools are transferred when the spindle and toolholders are in predetermined angular positions. Spindle 42 is driven by an hydraulic motor 53, Fig. 2, through a change-speed transmission 65, and a key and keyway 176, 177 are provided for holding the spindle in the required angular position during a tool change. The transmission provides sixteen different speeds and motor 53 can be driven in either direction at two speeds. The gear-shifting forks 86-89, Fig. 4, are moved by hydraulically actuated rods, the fluid supply to which passes through solenoid operated valves, which may be tape controlled along with the other movements of the machine tool. Motor 53 may also be operated at a creep speed to assist in engagement of key and keyways 176, 177, and to prevent shearing off of this key. A spindle angle orientation signalling device is provided which causes the pressure supply to motor 53 to be reduced. |
