인버터 저항 용접기의 냉각 성능 개선이 용접 특성에 미치는 영향에 대한 연구
Welding characteristics on the effect of improving the cooling performance in the inverter resistance welding machines
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초록
The DC current was utilized for welding in inverter resistance spot welding machines. Also, a diode rectifier as a DC power supply had been used in the current resistance welding machines. In the process of rectifying an alternating current into a direct current by a diode rectifier, heat could be generated in the diode and, when overheated, the performance of the resistance welding machines might become unstable or could be set on a fire. In order to prevent these phenomena, the size of the diode assembly has been greatly increased by the amount of current required when outputting a high voltage current. In order to prove the effect of improving the cooling performance of the inverter resistance welding machines on welding characteristics, impact tests, leak tests, and tensile tests were all performed. This study aims at improving the cooling performance and rectifying the diode rectifier for the transformer of the inverter resistance spot welder for both rectifying a large amount of current and reducing the size of the external shape in order to produce stable welding characteristics.
Abstract
The DC current was utilized for welding in inverter resistance spot welding machines. Also, a diode rectifier as a DC power supply had been used in the current resistance welding machines. In the process of rectifying an alternating current into a direct current by a diode rectifier, heat could be generated in the diode and, when overheated, the performance of the resistance welding machines might become unstable or could be set on a fire. In order to prevent these phenomena, the size of the diode assembly has been greatly increased by the amount of current required when outputting a high voltage current. In order to prove the effect of improving the cooling performance of the inverter resistance welding machines on welding characteristics, impact tests, leak tests, and tensile tests were all performed. This study aims at improving the cooling performance and rectifying the diode rectifier for the transformer of the inverter resistance spot welder for both rectifying a large amount of current and reducing the size of the external shape in order to produce stable welding characteristics.
참고문헌 (7)
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- Oh, J. H., "A Develope of Inverter Spot Welding System", Proc. of the Power Electronics Annual Conference, pp.172~174 (2006)
- 윤한기, "전기저항 점용접한 자동차 강판의 강도특성평가", 동력시스템공학회지, 17(4), pp.115~119 (2013), 한국동력기계공학회
- Kang, Y. K., "A study on the selectionoptimun welding condition of aluminum-alloy using simulation", Master, pp.2003
- Jung, Y. H., "A Study of Weldability & Indentation Depth Eveluation of Electrochemical Galvanized Steel Sheet According to the Welding Conditoions", KWS Conference, pp.162~164 (2003)
- Kang, Y. C., "A Study on Microstructures and Mechanical Properties of Mild Steel Joined with Various Spot Welding Conditions", Journal of KSW, 18(1), pp.52~58 (2000)