The Study of Corona Induced Discharge and Microwelding of Fine Wires
Date Issued
2010
Date
2010
Author(s)
Lin, Jin-Yi
Abstract
Micro technologies have been vigorously developed recently on the demand of micro products, which have been widely used in many fields, such as electronic, medical, optical, automotive and aerospace applications. Among which, micro joining is so challenging that lots of researches have involved with. In the field of micro joining, most studies are focused on laser, ultrasonic and arc welding technologies, none of which can satisfy all demands of micro welding. This study presents an innovative two-step discharging technology, performing on a self-made experimental platform, which can ignite the discharge of corona, then followed by spark discharge. In order to make sure if this technology is feasible, thin wire joining experiments, similar the joining of thin conductive wires of thermocouples, have performed. The achievements of the experiments includes presenting a welding technology of double discharging, figuring out theoretical joining current to be 47 mA and energy efficiency to be 78%, modifying the die on the micro welding machine to butt-weld a brass wire of 0.25 mm, etc. In order to testify the effect on micro welding, an electronic microscopy is used to check micro cracks and porosities, and tensile and hardness tests are also provided. The results confirm the excellent quality of the welding. The features of this technology include simple equipped, low cost, and easy to maneuver. A finite element analysis software is also introduced in this study to simulate the welding temperature field, generating energy modified values, which can be used to speed up welding process and improve quality. The technologies and discusses presented in this research are unique and creative, offering choice for the field of micro technology and hopefully opening new tract for applications of micro discharge.
Subjects
micro joining :micro welding :corona :spark discharge :corona induced discharge method
SDGs
Type
thesis
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