METHOD OF DETERMINING ABNORMALITY OF BUTT WELDING

PROBLEM TO BE SOLVED: To provide a method of determining abnormality of butt welding enabling the occurrence of a blow hole in a weld bead to be determined.SOLUTION: The method of determining abnormality of butt welding comprises the steps of: (ST101) forming weld beads (M0-M3) by continuously irrad...

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Hauptverfasser:	TATEYAMA NOZOMI, UCHIDA YOSHIAKI
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:	PROBLEM TO BE SOLVED: To provide a method of determining abnormality of butt welding enabling the occurrence of a blow hole in a weld bead to be determined.SOLUTION: The method of determining abnormality of butt welding comprises the steps of: (ST101) forming weld beads (M0-M3) by continuously irradiating a laser beam (L1) so as to cross a butt surface (W3): (ST102) irradiating the weld beads (M0-M3) with laser beam smaller in output than output of the laser beam (L1) irradiated in the welding step (ST101) and acquiring a light intensity waveform of the reflected light reflected from the weld beads; and (ST103) determining that abnormality is caused in butt welding when the acquired light intensity waveform of the reflected light is different from a prestored reference light intensity waveform.SELECTED DRAWING: Figure 6 【課題】溶接ビード内におけるブローホールの発生を判定することのできる突き合わせ溶接の異常判定方法の提供。【解決手段】突き合わせ面（Ｗ３）を横切るように連続してレーザ光（Ｌ１）を照射し、溶接ビード（Ｍ０〜Ｍ３）を形成する（ＳＴ１０１）。溶接ステップ（ＳＴ１０１）において照射されるレーザ光（Ｌ１）の出力よりも出力が小さいレーザ光を、溶接ビード（Ｍ０〜Ｍ３）に照射して、溶接ビードから反射される反射光の光強度波形を取得する（ＳＴ１０２）。取得した反射光の光強度波形が、予め記憶しておいた基準となる基準光強度波形と異なる場合に、異常が突き合わせ溶接に生じたと判定する（ＳＴ１０３）。【選択図】図６