HIGH ENERGY BEAM WELDING QUALITY DETERMINING METHOD, QUALITY DETERMINING DEVICE USING DETERMINING METHOD, AND WELDING MANAGEMENT SYSTEM USING DETERMINING METHOD

WIPO Patent Application WO/2017/159532

A1

The present invention can improve accuracy of determining a welding quality or accuracy of maintaining, through feedback, a fixed welding quality in high energy beam welding, and thereby, improves the manufacturing efficiency, that is, the yield of welded articles. The present invention is characterized in that: an image of a molten pool is acquired by a camera; the width, length, and area of the molten pool are acquired by image processing; reflected light, plasma, and thermal radiation light are further acquired by an optical sensor; a weld penetration depth is predicted with high accuracy by multiple regression analysis using signals and using certain signals having interaction therebetween among the signals, and thus, a welding quality is determined with high accuracy; and beam output and a focal position are also predicted, the beam output and the focal point are maintained at appropriate values by feedback control of the beam output and the focal position, and thus, the welding quality is maintained at a fixed level.

ICHINOHE MASAYUKI (JP)
MIYAGI MASANORI (JP)
KUROKI TATSURO (JP)
ZHANG XUDONG (JP)
INOUE RYO (JP)

PCT/JP2017/009468

September 21, 2017

March 09, 2017

Click for automatic bibliography generation  

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

B23K26/21; B23K26/00; B23K26/03; B23K26/046; B23K26/08; F02M59/44; F02M61/16

JP2003170282A	2003-06-17
JP2011161452A	2011-08-25
JP2007326134A	2007-12-20
JP2015188912A	2015-11-02
JP2015047638A	2015-03-16
JP2012122388A	2012-06-28
JP2011073674A	2011-04-14
JP2013240801A	2013-12-05
JP2004358529A	2004-12-24

ONO, Shinjiro et al. (JP)

View/Download PDF      PDF Help

Previous Patent: ELECTRONIC DEVICE

Next Patent: AGENT FOR CONTROLLING THRIPS AND USE THEREOF