公开(公告)号：EP1726397A4

公开(公告)日：2009-04-01

申请号：EP05719733

申请日：2005-02-23

Applicant: NAT INST FOR MATERIALS SCIENCE ,  ISHIKAWAJIMA HARIMA HEAVY IND

Inventor： TSUKAMOTO S ,  KAWAGUCHI I ,  ARAKANE GORO ,  HONDA H

IPC: B23K26/00 ,  B23K26/20 ,  B23K26/03 ,  B23K26/06

CPC classification number: B23K26/032 ,  B23K26/03 ,  B23K26/06 ,  B23K26/21 ,  B23K31/125

Abstract: A laser welding method not causing welding defect by imparting controlled variation of the waveform and frequency to the laser output. The variation with time of the intensity of light of the plasma or plume produced by a laser welding unit is detected. The laser output variation condition is set so that the variation with time of the light intensity corresponds to the variation of the laser output, thus performing laser welding. As a result no welding defect is produced by imparting adequate variation of the waveform and frequency to the laser output. With this, a novel laser welding method in which the laser output variation condition is simply and adequately optimized is realized.

Abstract translation: 一种激光焊接方法，通过将波形和频率的受控变化赋予激光输出而不引起焊接缺陷。 检测由激光焊接单元产生的等离子体或羽流的光强度随时间的变化。 激光输出变化条件被设定为使得光强度随时间的变化对应于激光输出的变化，从而执行激光焊接。 结果，通过赋予激光输出足够的波形和频率变化，不会产生焊接缺陷。 由此实现了激光输出变化条件被简单且充分优化的新型激光焊接方法。

公开(公告)号：EP1516692A4

公开(公告)日：2007-08-29

申请号：EP03761829

申请日：2003-06-27

Applicant: NAT INST FOR MATERIALS SCIENCE

Inventor： KURODA SEIJI ,  FUKUSHIMA T ,  TSUKAMOTO S ,  ARAKANE G

IPC: B23K26/00 ,  B23K26/20 ,  B23K26/14 ,  B23K26/18 ,  B23K26/32 ,  B23K26/42 ,  B23K37/06

CPC classification number: B23K37/06 ,  B23K26/123 ,  B23K26/18 ,  B23K26/60 ,  B23K2201/34 ,  B23K2203/08

Abstract: In a laser welding method, the invasion of atmosphere gas into a molten metal and the occurrence of welding defects are prevented by coating a material having a high affinity for the atmosphere gas on the back surface of a work and therefore it is possible for a large output laser to easily weld a thick plate by employing a simple method.