Kawasaki Jukogyo Kabushiki Kaisha

Central Motor Wheel Co., Ltd.

Ichiro Arita

Kazuhiko Onoue

Yukimitsu Suzuki

Hirotaka Uehara

Satoru Yamasumi

Masaru Seto

Tadao Shimada

Sadao Kubo

Kunio Uchikoshi

Hirotaka Kinoshita

Takahisa Iizuka

To provide an arc start method in a consumable electrode type arc welding method capable of firmly executing arc start and capable of executing high quality high speed welding by restraining a welding defect from being brought about therefor, at a portion of a wire projected from a welding tip, a temperature of a front end portion of the wire is made to be at a temperature higher than a temperature of a portion thereof near the welding tip. The front end portion of the wire is preheated to 300&#xb0; C. or higher, preferably, 450&#xb0; C. or higher. The front end portion of the wire is preheated by generating arc for preheating. The preheating arc is generated in a spot-like shape at a position near a terminal end portion of a predetermined welding line by constituting a current lower than a welding current.

Arc start method in consumable electrode type arc welding method

A method of measuring a welding-groove position for an over-lapped fillet welding of thin members, comprising a projection step of projecting a slit light so that the slit light is projected on both the thin members crossing a welding-groove face, a two-dimensional image acquisition step of capturing the slit-light image projected on each of the thin members as two-dimensional images; a three-dimensional conversion step of converting the two-dimensional images into three-dimensional images using a predetermined three-dimensional conversion parameter, and a calculation step of calculating the welding-groove position based on the three-dimensional data of the projected slit-light images, and relative positions between the projected slit-light images in the three-dimensional data defined by shapes and arrangement of the thin members.

Method, apparatus and system for measuring a welding-groove position

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Ichiro Arita