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너트 프로젝션용접 품질 모니터링을 위한 전문가 시스템의 개발
김진우(J.W. Kim),임성룡(S.R. Lim),박찬우(C.W. Park),이광원(K.W. Lee),조상명(S.M. Cho) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.4
It has been very significant for car manufacturers to develop the quality assurance technology because of the application of PL(Product Liability). In the present study, during the nut resistance projection welding the current and voltage signal could be monitored to evaluate the welding quality. At the same time, dynamic resistance pattern could be obtained by the application of Ohm's law. Appling the dynamic resistance slopes to be defined as the differencial of the dynamic resistance by the proper time, process unstable factors such as initial contact, initial heat input and force followability could be evaluated. And the square sum of welding voltage and the end resistance could be used to evaluate total heat input and nugget growth. By setting up the algorithm to evaluate the various unstable conditions, the Expert System could be developed for the quality monitoring of the nut projection welding(M8)
김태진(T.J.Kim),변영복(Y.B.Byun),조기연(K.J.Joe),조상명(S.M.Cho),김철우(C.U.Kim) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
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-GMA W provides more control of the heat balance m the welding arc by taking advantage of the different arc characteristics obtained with each of the two polarities.<br/> In this paper, we proposed new VP GMA Welding method by control DSP 320C32, and the characteristic and experiment result-voltage, current, welding bead, penentraion by this method are presented