Honda Motor Co., Ltd.

Noriaki Shigematsu

Noriko Kurimoto

Mitsutaka Igaue

Kaoru Shibata

Kenichiro Kurai

Kazuhiko Yamaashi

Hitoshi Yoshimichi

Tetsuya Kodama

Yushi Aoki

Takuya Mori

Provided is a shaping device for a roller electrode for seam welding that prepares shapes for a first roller electrode and a second roller electrode attached to an arm of a robot. This shaping device is provided independently from the robot and disposed within rotational range of the arm, and is provided with a first roller and a second roller that are disposed on a line orthogonal to a line joining the rotational centers of the first and second roller electrodes and are in contact with the outer circumferences of the first and second roller electrodes.

Shaping device for roller electrode for seam welding

An autonomous traveling unit is provided with a pair of toggle mechanisms. The toggle mechanisms respectively have displaceable bodies provided with cam followers. A workpiece loading unit is provided with a member in an X shape to be clamped. The cam followers are respectively advanced to a pair of opposing corners (a first crossing portion and a second crossing portion) of the member to be clamped. When advancing to the pair of opposing corners, the cam followers are respectively brought into abutment on the member to be clamped, whereby the workpiece loading unit is restrained on the autonomous traveling unit.

Transport vehicle

The intensity of first reflected ultrasonic waves reflected from an end of a first electrode tip is measured while the electrode tip is separated from a workpiece. The intensity of second reflected waves reflected from the end of the electrode tip is measured while the electrode tip contacts with the workpiece. Based on the above intensities, an intensity ratio (reflectance) and the fraction of the waves entering the workpiece are determined from the following equations: reflectance=(intensity of second reflected waves)/(intensity of first reflected waves) fraction of waves entering the workpiece=1&#x2212;reflectance. From a predetermined correlative relationship between a contact area of a region enabling ultrasonic waves to be incident on the workpiece and the determined fraction of the entering waves, a ratio (contact area ratio) is determined between a total area of the region and a contact area of the region contacting with the workpiece.

Method of evaluation using ultrasonic waves

A spot welding inspecting apparatus is provided with: a gun chip; a signal transmitting part; an ultrasonic sensor; an inner cylinder; a through hole; a partitioning cylinder; a first flow path; a second flow path; and a third flow path. The inner cylinder is inserted to an outer cylinder of spot welding gun and holds the ultrasonic sensor. The through hole is provided on the inner cylinder. The partitioning cylinder surrounds the through hole and is inserted into a gap between the ultrasonic sensor and the outer cylinder. The first flow path is formed between the inner cylinder and the partitioning cylinder by passing the through hole from an inner portion of the inner cylinder. The second flow path is formed at the gun chip to be circulated around a front end of the partitioning cylinder. The third flow path is formed between the outer cylinder and the partitioning cylinder. A cooling agent flows in an order of the first flow path, the second flow path and the third flow path.

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Tochigi-ken, Japan

Noriaki Shigematsu