| 摘要 |
<p>An electric discharge machining device wherein an impulsive rapid motion occurring when an electrode actuator is put in operation is prevented from being transmitted to the quill side, while the rapid withdrawal of a tool electrode by the electrode actuator is effectively carried out, in which the tool electrode (4) is mounted on the quill (1) via an elastic support portion (2) and a piezoelectric actuator (3) with the elastic support portion (2) being placed on the quill side. The elastic support portion (2) is provided with such elasticity as not providing difficulty in positioning the tool electrode (4) in a normal fashion, and the piezoelectric actuator (3) is used for rapid withdrawal of the tool electrode (4). A counterweight (18) having a mass capable of absorbing that component of the impulsive rapid motion of the electrode actuator (3) which is directed towards the quill side is provided on a supporting body (12).</p> |
