| 摘要 |
PURPOSE:To enable the straight guiding of a wire electrode without any lateral runout by providing a electrode guide, feeding a fluid of high kinematic viscosity to its recess part and installing a rotary device causing relative rotation between said electrode and guide. CONSTITUTION:A wire electrode 1 is wound and stored on a reel 2 and supplied whenever necessary for machining a workpiece. A concave part 5a is formed at a wire electric passage inside a guide 5 introducing the electrode wire 1 and a fluid 6 of high kinematic viscosity is fed to the recess part 5a. The wire electrode as supplied from the reel 2 is tensioned by a brake 3 and a feed roller 4 for the removal of a bend and supply in a straightened form. In the guide 5, the fluid 6 works for stable guide without any friction and a workpiece is machined by the wire electrode 1 projected from the tip of the guide. The wire electrode 1 turns due to the rotation of a frame 10 driven by a motor 13 and the guide 5 driven by another motor 8 rotates relatively with the wire electrode 1. This relative motion causes an increase in contact resistance between the fluid 6 and the wire electrode 1, thereby giving the dynamic pressure control of centripetal force to said electrode 1. |
