Modification and adaptation of WEDM wire-lag models for use in production environments
| Autor: | Kirwin, Roan |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Text |
| Popis: | Wire Electrical Discharge Machining (WEDM) is a type of machining that uses electric discharges between a wire and a work piece to erode electrically conductive material. WEDM suffers from a phenomenon called wire lag. Wire lag is when the wire electrode bends into an arc and the center of the wire is pushed in the opposite direction of machining. The lag is generally very small but, when extremely tight tolerances on curved or sharply angled geometry are desired, can be a large source of error. Lag is caused by both electromagnetic forces and explosive forces acting between the wire and the workpiece. This research investigates the feasibility of a program to modify machining G-code to compensate for wire lag at sharp corners. A model of wire lag was demonstrated and methods for developing modifications to incorporate both surface feed and eliminate the need for a scanning electron microscope measurements to minimize wire lag have been discussed. This was done by demonstrating a method for relating pulse on time and voltage with each plasma discharge’s area. Lastly an outline for a program that compensates for wire lag at thresholded angles was shown. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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