| 摘要 |
PURPOSE:To improve the positioning accuracy and the machining accuracy of an electrode by providing a mechanism by means of which the angle of each joint part is fixed, in an electric machine in which a mechanical hand for holding said electrode is provided on the end of its multi-joint arm. CONSTITUTION:In an electric machine such as an electric discharge machine, etc., a mechanical hand 15 for holding an electrode 20 is provided on the main shaft at the end of a multi-joint arm 3 to 5. The replacement of electrodes in a tool magazine is carried out by the action of the multi-joint arm 3 to 5 and the hand 15, to select a required electrode. The electrode 20 is positioned in a desired position at a desired angle on a workpiece 21 by means of the multi- joint arm, and position pins are fitted in engaging holes by operating solenoids 17, 27, 28, to fix the angle of each joint. By means of this locking mechanism, the positioning accuracy and the accuracy of angle of the electrode can be improved. |
