| 摘要 |
A wire electrode pull-up mechanism in a wire-cut electric discharge machine having an energized wire electrode stretched between upper and lower guides for machining a workpiece wherein the wire electrode pull-up mechanism pulls up a wire electrode which has been passed through a bore in the workpiece until the upper end of the wire electrode protrudes from the upper side of the workpiece, and includes a gripping member for gripping the wire electrode. The gripping member includes an arm having a bearing wall at the distal end thereof; a clamping member pivotally provided on the arm and having a cam body and a restraining portion for abutting against the bearing wall of the arm; a spring member for urging the clamping member in such a manner that the restraining portion thereof abuts against the bearing wall; and an operating member pivotally provided on the arm and having a cam operating portion abutting against the cam body of the clamping member for pivoting the clamping member, the operating member being pivoted owing to pressured contact with the upper surface of the workpiece. The clamping member is pivoted as the operating member abuts against the workpiece, in such a manner that the clamping member causes a gap to be formed between the restraining portion and the bearing wall, and the operating member separates from the workpiece when the arm is raised. |
