METHOD FOR EVALUATING JOINT POINT OF SPOT WELDING

To provide a method for accurately evaluating a quality even in a joint point that cannot be evaluated by a chisel test and ultrasonic inspection.SOLUTION: A method evaluates a joint point (nugget) using heating density D represented by D=I V/S, when a current value flowing between a pair of electro...

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Bibliographische Detailangaben
Hauptverfasser:	KIMOTO KEIICHIRO, KATO TOMOTSUGU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	To provide a method for accurately evaluating a quality even in a joint point that cannot be evaluated by a chisel test and ultrasonic inspection.SOLUTION: A method evaluates a joint point (nugget) using heating density D represented by D=I V/S, when a current value flowing between a pair of electrodes 10 and 20 is represented by I, a voltage between the pair of electrodes 10 and 20 is represented by V and a contact area in a joint-scheduled part P of a plurality of metal plates 1 and 3 is represented by S.SELECTED DRAWING: Figure 2 【課題】たがね試験や超音波検査では評価できない接合点であっても、品質を正確に評価できる方法を提供する。【解決手段】一対の電極１０，２０間を流れる電流値をＩ、一対の電極１０，２０間の電圧をＶ、複数の金属板１，３の接合予定部Ｐにおける接触面積をＳとしたとき、Ｄ＝Ｉ・Ｖ／Ｓで表される発熱密度Ｄを用いて接合点（ナゲット）の品質を評価する。【選択図】図２