Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Michio Sakurai

Toru Sakai

Takashi Urashima

Daichi Higashi

Kenta Kubota

Kenji Takahashi

Atsuhiro Kawamoto

Junji Fujiwara

Toshiyuki Mishima

Tomoko Fukunaka

Masashi Ishiguro

Narumi Atsuta

Shinsuke Kurahashi

Masashi Yoshida

Kensuke Urata

A laser welding device includes: an irradiator configured to overlap laser light and measurement light coaxially with each other and apply the laser light and the measurement light to a weld part, a wavelength of the measurement light being different from a wavelength of the laser light; a measuring instrument configured to repeatedly measure a weld penetration depth of the weld part based on the measurement light that is emitted from the irradiator and reflected on the weld part so as to generate measured values; and a determiner configured to determine the weld penetration depth of the weld part based on: (i) one or more of the measured values; or (ii) an average value of the one or more measured values, the one or more measured values being included within a predetermined range with reference to a greatest side measured value of the measured values.

Laser welding device and laser welding method

A laser welding device is configured to switch an irradiation position of a measurement beam between a position of a keyhole coaxial with the optical axis of a laser beam and a position of a weld bead behind the center of an optical axis of the laser beam in a welding direction. The laser welding device determines whether there is a gap between an upper metal plate and a lower metal plate based on a measured value of a recess depth measured at the position of the weld bead.

Laser welding device

Laser welding is performed while moving irradiation positions of a laser beam and a measurement beam in forward, rightward, rearward and leftward directions, and the penetration depth of a weld portion is measured during laser welding in each of the directions. Then, a direction in which a value smaller than a reference value is measured is determined to be an optical axis deviation direction, and a correction value is added to the values measured during the laser welding when the laser welding is performed in the optical axis deviation direction.

Laser welding method

A laser welding device () for welding a weld part () with laser light (L) includes: a laser emitting head () overlapping the laser light (L) and a measurement light (S) coaxially with each other and applying the laser light (L) and the measurement light (S) to the weld part (), the measurement light (S) having a wavelength different from a wavelength of the laser light (L); a first parallel plane plate and a second parallel plane plate, changing an irradiation position of the measurement light (S) such that the irradiation position orbitally move around a center of rotation that moves on a predetermined welding path in a radius of rotation that is smaller than ½ of a spot diameter of the laser light (L); a measuring instrument () repeatedly measuring a weld penetration depth of the weld part () based on the measurement light (S) that is emitted from the laser emitting head () and is reflected on the weld part () while the measurement light (S) is being orbitally moved; and a determiner () determining the weld penetration depth of the weld part () using a plurality of measured values of the weld penetration depth, the plurality of measured values being measured by the measuring instrument () within a fixed time period while shifting a start time point of the fixed time period.

A laser welding device includes: an irradiator configured to overlap laser light and measurement light coaxially with each other and apply the laser light and the measurement light to a weld part, a wavelength of the measurement light being different from a wavelength of the laser light; a measuring instrument configured to repeatedly measure a weld penetration depth of the weld part based on the measurement light that is emitted from the irradiator and reflected on the weld part so as to generate measured values; and a determiner configured to determine the weld penetration depth of the weld part based on (i) one or more measured values; or (ii) an average value of the one or more measured values, the one or more measured values being included within a predetermined range with reference to a greatest side measured value of the plurality of measured values.

A welding system includes a welding apparatus and an appearance inspection apparatus. The appearance inspection apparatus includes: a shape measurement unit that measures the shape of a weld; an image processor that generates image data based on data of the shape; a determination unit that determines whether the shape of the weld is good or bad based on the image data and a determination model; and a feedback unit that extracts shape defect information if the result of the determination by the determination unit is negative. An output controller of the welding apparatus corrects a welding condition for a workpiece based on the shape defect information extracted by the feedback unit.

Welding system, and method for welding workpiece in which same is used

A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam S deviates from a laser beam L. In performing laser welding in the optical axis deviation direction, an irradiation position of the measurement beam S is changed so that the irradiation position of the measurement beam S is moved to a rear side of the center of the optical axis of the laser beam L in the welding direction.

A method and device capable of properly selecting light radiating conditions in soldering work where components are soldered onto a board with light radiation applied to a solder joint. The device for selecting the light radiation conditions may contain a) an input device for entering information on; b) a storage for storing at least any one of databases on light radiation power and light radiation time for soldering; c) a calculator for determining light radiating conditions according to the information entered through the input device and the database stored in the storage; and d) an output device for outputting the light radiating conditions determined by the calculator. The input device may further comprise i) a component; ii) a board on which the component is soldered; and iii) solder for soldering the component.

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Osaka, Japan

Michio Sakurai