| 摘要 |
An automatic tool changing device for aligning a selected tool accurately with a headstock spindle. A rotatable drum has a plurality of tool holding positions and a locating rod adjacent to and axially aligned with each of the tool holding positions. An electric motor with an electromagnetic brake rotates the drum to substantially properly align a selected tool. The drum is laterally movable on a support mounted on the headstock between a first position in which the selected tool is spaced axially from the headstock spindle but substantially aligned therewith, and a second position in which said tool engages the spindle. A tapered aligning opening on the headstock receives the locating pin associated with the selected tool as the drum is moved laterally to rotate the drum slightly, if necessary, to precisely align the tool as it engages the spindle. |
