JPS57137089A - Control method for welding state - Google Patents

Control method for welding state

Info

Publication number
JPS57137089A
JPS57137089A JP56021925A JP2192581A JPS57137089A JP S57137089 A JPS57137089 A JP S57137089A JP 56021925 A JP56021925 A JP 56021925A JP 2192581 A JP2192581 A JP 2192581A JP S57137089 A JPS57137089 A JP S57137089A
Authority
JP
Japan
Prior art keywords
reflected
light
detection
melt
photodetectors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56021925A
Other languages
Japanese (ja)
Other versions
JPH0228433B2 (en
Inventor
Taisuke Shimoi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56021925A priority Critical patent/JPS57137089A/en
Publication of JPS57137089A publication Critical patent/JPS57137089A/en
Publication of JPH0228433B2 publication Critical patent/JPH0228433B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam

Abstract

PURPOSE:To make the automatic decision of whether welding states are good or not possible by irradiating detection light to the members to be welded, and detecting melt diameter from the change in the quantity of the reflected detection light. CONSTITUTION:When a laser beam L is outputted by operating a laser oscillator and the 1st member 12 to be welded is irradiated, the member 12 begins to melt upon lapse of a prescribed time after the start of the irradiation. On the other hand, light projectors 14a-14e are operated together with the laser oscillator and the detection beams l1-l5 reflected by the member 12 are detected with photodetectors 15a-15e. More specifically, the detection beam l3 reflected from the central part of the spot of the laser beam L irradiating the member 12 lowers in reflectivity and the quantity of reflected light as the central part melts earliest. The states of the quantity of the reflected light detected with the photodetectors 15a-15e are arithmetically operated in a single processing and displaying device 16, by which the melt diameter of the 1st member 12 is known. From this melt diameter, whether the molten state is good or not is decided.
JP56021925A 1981-02-17 1981-02-17 Control method for welding state Granted JPS57137089A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56021925A JPS57137089A (en) 1981-02-17 1981-02-17 Control method for welding state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56021925A JPS57137089A (en) 1981-02-17 1981-02-17 Control method for welding state

Publications (2)

Publication Number Publication Date
JPS57137089A true JPS57137089A (en) 1982-08-24
JPH0228433B2 JPH0228433B2 (en) 1990-06-25

Family

ID=12068640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56021925A Granted JPS57137089A (en) 1981-02-17 1981-02-17 Control method for welding state

Country Status (1)

Country Link
JP (1) JPS57137089A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61286081A (en) * 1985-06-13 1986-12-16 Toshiba Corp Laser welding method
JPS6483390A (en) * 1987-09-24 1989-03-29 Nec Corp Laser beam machine
US20090032512A1 (en) * 2005-03-07 2009-02-05 Boris Regaard Method for Measuring Phase Boundaries of a Material During Machining With a Machining Beam Using Additional Illumination Radiation and an Automated Image Processing Algorithm, and Associated Device
CN106181144A (en) * 2016-07-13 2016-12-07 广东工业大学 A kind of detection method of concave welding bead position

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55144393A (en) * 1979-04-25 1980-11-11 Westinghouse Electric Corp Method of observing welding portion

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55144393A (en) * 1979-04-25 1980-11-11 Westinghouse Electric Corp Method of observing welding portion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61286081A (en) * 1985-06-13 1986-12-16 Toshiba Corp Laser welding method
JPS6483390A (en) * 1987-09-24 1989-03-29 Nec Corp Laser beam machine
US20090032512A1 (en) * 2005-03-07 2009-02-05 Boris Regaard Method for Measuring Phase Boundaries of a Material During Machining With a Machining Beam Using Additional Illumination Radiation and an Automated Image Processing Algorithm, and Associated Device
US8207471B2 (en) * 2005-03-07 2012-06-26 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Method for measuring phase boundaries of a material during machining with a machining beam using additional illumination radiation and an automated image processing algorithm, and associated device
CN106181144A (en) * 2016-07-13 2016-12-07 广东工业大学 A kind of detection method of concave welding bead position

Also Published As

Publication number Publication date
JPH0228433B2 (en) 1990-06-25

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