• Title/Summary/Keyword: 박판 용접

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The Study of Variable Polarity AC Pulse MIG Arc Welding System (출력전류 극성비 변화를 가지는 펄스MIG아크용접의 특성)

  • 김태진;백주원;조상명;김철우
    • The Transactions of the Korean Institute of Power Electronics
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    • v.8 no.4
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    • pp.307-312
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    • 2003

  • Joining thin aluminum alloy is difficult using most welding techniques. Many of problems associated burn-through by the high heat input. Common welding techniques are TIG, MIG, and MIG-PULSE welding. The VP-GMAW provides more control of the heat balance in the welding arc by taking advantage of the different arc characteristics obtained with each of the two polarities. In this paper, we proposed new VP-GMAW method by control DSP 320C32, and the characteristic and experiment result-voltage, current, welding bead, penetration by this method are presented.

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A Study on the Spot Weldability of Sn-37%Pb Coated Cu-sheet (Sn-37%Pb solder를 도금한 Cu 박판의 점 용접성에 관한 연구)

  • 박창배;김미진;정재필
    • Journal of the Microelectronics and Packaging Society
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    • v.6 no.3
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    • pp.45-50
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    • 1999

  • Copper has been widely used for the electronic parts, and especially spot welded one for the leads of condenser or resistor. However, copper is generally hard to be spot welded because of its low electrical resistivity. For this experiment, Sn-37%Pb solder which has relatively higher resistivity was coated on the Cu-sheet to improve the spot weldability of copper. As the experimental variables welding pressure was varied from 100 to 200kgf, welding time from 20 to 50ms, and welding current from 100 to 2500A. Experimental results showed that the solder coated Cu-sheet can be spot welded under the conditions of 400~2200A welding current, 100~200kgf pressure and 20-50ms welding time. The tensile shear strength of the spot welded joint increased with welding current up to the critical current, and after the critical value decreased with current.

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