Kabushiki Kaisha Yaskawa Denki

Kabushiki Kaisha Yaskawa Denki Seisakusho

Other

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Yasakawa Denki Seisakusho

Kabushiki Yaskawa Denki

Hitachi Via Mechanics, Lt

Seigo Nishikawa

Shinji Okumura

Tatsumi Nakazato

Hiroaki Ito

Ryuichi Morita

Tsuneo Shinada

Tadayuki Amano

Kazutoshi Hata

Akio Sato

Tomohiro Matsuo

Tomoyuki Shiraki

Koji Nomura

Atsushi Ichibangase

Kazuhiro Haniya

Toshimitsu Irie

Kiyoshi Hirakawa

Yoshitaka Sakamoto

Seiichiro Fukushima

Masaaki Hara

Hiroyasu Hirota

Kazuhiro Tomiyasu

Tsuneo Mita

Taketoshi Tazaki

Hiroshi Inokuchi

Kazushige Ichikawa

Kiminori Nishimura

Kazuhiko Nishimura

Shunsuke Maeda

Koji Muragaki

Kiyoshi Naito

Takeshi Ikeda

Hideyasu Machii

Hirotaka Adachi

Kanji Katada

A consumable electrode type arc welding method for generating arc between a plate-shaped work and a welding wire by a mixed shield gas including argon gas to weld the plate-shaped work, includes:

Arc welding method

The present invention provides a robot system in which a robot and a positioner are combined with each other. In the robot system, footprint is reduced and a production line having a short tact time between steps is formed. The robot system includes a work object, robots that perform a work operation on the work object, and positioners that position the work object, wherein the robots are provided on frame members of the positioners.

Robot system

A robot system includes s a robot () which moves a tool () attached to an end of the robot () by driving a robot drive shaft. The tool () applies a laser beam inputted from a laser oscillator () by drive of the tool drive shaft to an object. A robot control device () controls the robot drive shaft and the tool drive shaft in synchronization.

Laser tool robot system with coordinated drive shaft control

A robot welding controller and a robot welding control. It comprises a robot having a welding torch at its tip, a robot controller, a wire feeder, and a welding electric power. It performs welding by moving the welding torch on the basis of a commanded welding line. A contact detecting section detects contact of the wire and the base material. A feed direction switching section switches feed directions of the wire. An arc generation detecting section detects that an arc is generated between the wire and the base material. A waveform control section controls electric power waveforms of plural shapes applied between the wire and the base material. A welding sequence section controls the operations of the contact detecting section, the feed direction switching section, the arc generation detecting section and the waveform control section in block.

Robot welding controller and control method

An arc welder comprising: a rectifier circuitwhich rectifies an alternating currentto a direct current; an inverter circuit; a transformer; a second rectifier circuitwhich rectifies an output of the transformerto a direct current; and a first reactorwhich is connected to the second rectifier circuit. The arc welder further has a current circuitwhich is connected in parallel to the second rectifier circuitwith a reactance that is larger than the reactance of the first reactor

Arc welder

It is an object to provide an arc welding apparatus capable of causing an operator to easily decide a welding abnormality and the quality of a welding condition by simultaneously displaying a welding current command value, a welding voltage command value and a wire feeding speed command value and switching and displaying an actual welding current value, an actual welding voltage value and an actual wire feeding speed. There are provided a welding torch (), a wire feeding device for feeding a wire () in contact with the internal surface of a chip () of the welding torch (), a welding source () for supplying a power to the chip () and a base metal (), a welding current detector () and a welding voltage detector (), and a wire feeding speed command value, a welding current value and a welding voltage value are displayed independently and simultaneously.

Arc welding equipment

An arc welding cable that is resistant to bending and twisting and can give a long life is provided. For this purpose, an arc welding cable () for supplying a welding current, a welding wire and a sealed gas from a wire feeding device () to a welding torch (), has a passage () for the welding wire () and sealed gas is located at a center of the arc welding cable and a plurality of conductors () are arranged apart from one another on a circumference around the passage (). The space between the plurality of conductor () may be filled with a cushion material such as cotton or elastic synthetic resin.

Arc welding cable

An EP output voltage to be outputted during a period of EP polarity is set so that a welding current becomes equal to or lower than a critical current level, and an EN output voltage to be outputted during a period of EN polarity is set at a level lower than the EP output voltage. This makes it possible to substantially equalize a wire melting rate in the period of EN polarity and that in the period of EP polarity with each other. Even at such a short arc length as causing frequent short circuiting, gas-shielded AC arc welding making use of a consumable wire can be still performed stably so that high wire melting rate, shallow penetration, convex weld reinforcement and the like, which are characteristic features of AC welding, can each be set selectively at a desired level or in a desired shape depending on the application.

Gas-shielded AC arc welding method and machine making use of consumable electrode

Line detecting method using two rectangular windows passing through the

In the case where lap fillet welding is carried out by a conventional arc welding robot, when a weld wire is once departed towards an upper plate, the wire keeps being away from a weld line, and therefore, various teaching techniques so as to prevent such a departure have been re-required. In the case where a weld line is long, if the wire is departed, a defective weld length becomes long, thus posing an significant problem. The present invention provides a control method for an arc sensor by detection of a weld current. That is, a departure of a lap fillet weld towards an upper plate is prevented merely by addition of a detection algorithm, teaching can be simplified and practical merits are great.

Automatic copying method for a welding torch in an arc welding robot

A method of detecting information on an arc welding position by monitoring the shape and/or position of an welding arc. When in the arc welding along a welding groove position while locating the same, the shape of the arc is picked up from above the joint portion of a member to be welded by means of an image pickup device, and the arc shape picked up is binary-coded. This binary arc shape and/or position are monitored to detect the welding groove position, the height of the welding torch, the welding start point, the welding end point, the external corner point, the internal corner point, the contact point of the welding wire with the work, and the welding groove gap.

Positional information detecting method in arc welding

A method is disclosed for correcting the travel path of an oscillating robotic welding torch tracing a groove line defined by an upper and lower plate. According to one aspect of the invention, a first integrated value of the welding current at the center of oscillation is compared with second and third integrated values of the welding current at opposite first and second ends of the oscillation, respectively. The travel path of the robotic welding torches adjusted towards the second end of oscillation when the second and third integrated values of the welding current are smaller than the first integrated value of the welding current. According to another aspect of the present invention, a first integrated value of the welding current at the second end of oscillation of a previous oscillation torch is compared with a second integrated value of the welding current at the second end of oscillation of a subsequent oscillation. The travel path of the robotic welding torch is adjusted towards the second end of oscillation when the difference between the first and second integrated value exceeds a predetermined allowable value. According to yet another aspect of the present invention, an integrated value of the welding current at the second end of oscillation is compared with an average integrated value of the second end of oscillation. The average integrated value at the second end of oscillation being a value resulting when the robotic vehicle correctly traverses the groove line. The travel path is adjusted towards the second end of oscillation when the difference between the first and average integrated values exceeds a predetermined allowable deviation value.

Automatic groove tracing method for an arc welding robot

Growing community of inventors

Fukuoka, Japan

Seigo Nishikawa