Study on Micro Wire EDM with Vibration Cutting Technology

• Main Authors: Bai-Jun Cai, 蔡百鈞
• Other Authors: Gwo-Lianq Chern
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/33149332077812691856

碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 91 === In this thesis, Vibration Cutting Technology has been applied to the Micro Wire Electrical Discharge Machining. We analyzed the surface roughness of the workpiece, dimensional accuracy of the workpiece and the occurance of electric discharge short circuit. Further we looked for the best combination of machining parameters that obtained the optimum surface roughness and decreased the occurance of electric discharge short circuit. Through the results of the experiment, we discuss the effect of the vibration cutting on machining quality. Vibration cutting is made by a piezo-electrical actuator. In accordance with the machining type, the vibration cutting device was designed and manufactured to carry out the Wire Electrical Discharge Machinin experiment. We can observe the machined surface and slot pitch by optical microscope and Scanning Electron Microscope. Eventually, we analyze the results by Taguchi method. Form the results of the experiment, we found that vibration cutting improved the surface roughness, dimensional accuracy and electric discharge short circuit. In WEDM, we obtained the surface roughness of 0.9 with high frequency vibration and the surface roughness was 4.2 without vibration respectively. When vibration cutting is utilized, it can decrease the heat generated from cutting and the friction of the interface between copper wire and chips, and then improve the precision of manufacturing and the surface roughness.