Analysis of Wire-Guide’s Quality in Wire Electrical Discharging Machine

• Main Authors: Chen,Wei-Lin, 陳威霖
• Other Authors: Wang Hai
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/yk673v

碩士 === 明志科技大學 === 機械工程系機械與機電工程碩士班 === 104 === The use of thin wire continuously fed as an electrode, when Wire Electrical Discharging Machine (WEDM) in operation. Discharge method to the workpiece with high accuracy. Process to impose tension on the wire electrode, the wire electrode keep transport and tension to maintain the situation at the same time, and gradually moved toward the workpiece so as to cause a discharge phenomenon. However, the vibration will cause the electrode wire cutting deviation, thereby affecting the processing accuracy, reduce the vibration phenomena in general is to install two sets of wire guides on electrode lines. The purpose of this thesis is the use of QV (Quick Vision) image measurement detected in WEDM wire-guide. In research, using different measurement strategies and establish a set of measurement techniques to measured wire-guide’s various data include: concentricity, wire-guide’s bearing length, wire-guide’s aperture and change measurement parameters such as: light intensity, different magnifications, different focus method, with the use of the Taguchi method to find the optimum measurement parameters to find the best stability from aperture measurement, After then multiple objectives modular automated measurement of yield huge demand for quality wire eye mode full review and compare with manual inspection. Finally using the higher precision’s confocal microscope to measure wire-guide’s aperture and make the error comparison with QV, to proof OV’s accuracy in order to increase the reliability of the measured data. The results show, in which a wire guide is not in tolerance limits (+ 0.003mm~ -0.0015mm) within, all other dimensions are within tolerance limits. The length of the bearing is preferably 20% to 50% of the aperture size, then one diamond bearing length only with 13.18% of the aperture size, and get the true measure of optimal parameters of roundness measurement error standard deviation was obtained as a fast focus speed, the lens magnification 2X, high light intensity and the number of 72 points to take.