专利名称：Laser welding quality evaluation method and apparatus 发明人：松本 清市，三瓶 和久，粟野 芳朗，河木 博行，北山 綱次，石井 靖弘
申请号：JP2004271860
申请日：20040917
公开号：JP4179558B2
公开日：
20081112
摘要：
PROBLEM TO BE SOLVED: To surely recognize the situation of the generation of blow out from image picking-up picture.
SOLUTION: A CCD camera 8 for receiving the reflected light B of a laser beam A which is reflected from a laser beam irradiation area through an optical filter 7 is fixed to a laser beam torch 1 for irradiating a material W to be welded with the laser beam and the image of a molten pool 5 including a key hole 4 and its periphery are picked up by the CCD camera 8. The picked-up image is sent to an image analyzing means 11 in a signal processor 9 and the positional variation of a back high luminance part which is located on the backside in the welding direction is calculated. Thereupon, arithmetic results (fluctuating frequency, the range of fluctuation, etc.) obtained by the image analyzing means 11 are compared with a preliminarily stored threshold value by the quality judging means 12 and it is judged that the blow out is generated in the case the arithmetic results exceed the threshold value.
COPYRIGHT: (C)2006,JPO&NCIPI
申请人：トヨタ自動車株式会社，株式会社豊田中央研究所
地址：愛知県豊田市トヨタ町１番地，愛知県愛知郡長久手町大字長湫字横道４１番地の１国籍：JP,JP 代理人：萼 経夫，宮崎 嘉夫，小野塚 薫,▲高▼ 昌宏，中村 壽夫
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