| 摘要 |
A machining center has a tool magazine in the form of an endless track. The tools are each mounted in an individual carriage, the carriages being packed end-to-end in the track and being drivable along it. A tool-change station is defined by a gap in the track from which one carriage may be removed for insertion of the tool into the machine spindle. A main tool-change incorporates a section of the track which completes the magazine track when this arm is in one position, and an auxiliary or carrier arm completes the track when the main arm is located away from the track. To avoid direct reading of the tools or carriages (which change their order in the magazine as tools are used and replaced) a simulator track is provided along which elements simulating the tools or carriages are driven simultaneously with the drive to the carriages. A reading device reads distinctive indicia on the simulator elements as they pass a reading station, and a signal is generated which governs the movement of the carriages and simulator elements. When a simulator element corresponding to a fresh tool required is read, the drive is stopped with this tool in the correct position for the first stage of tool-change. |
