Mayekawa Mfg. Co., Ltd.

The Kansai Electric Power Co., Inc.

Hideki Shudai

Daisuke Miyazaki

Yoshihiko Ueno

Masato Takeda

Toshikazu Kamae

Keisuke Yamada

Hisashi Kitagawa

Yoshiyuki Oomasa

Tetsuji Terada

Toshinori Ohtomo

Akito Machida

Hiromichi Fukumoto

Shinji Fukamura

Daisaku Hashimoto

Yasuchika Kashihara

A welding device for a non-circular plate according to an embodiment includes a chuck for gripping and rotatably supporting a plurality of laminated non-circular plates, a welding torch for welding outer peripheral edge portions of the plurality of laminated non-circular plates, a stationary shield box, and a movable shield box which is position-adjustable with respect to the welding torch so as to form a shield space surrounding the welding torch with the stationary shield box.

Welding device for non-circular plate and producing method for non-circular plate structure

A method of producing a plate laminate unit for a heat exchanger includes: a compressing step of compressing a plate laminate, a pair of terminal plates disposed on both sides of the plate laminate in a laminating direction, and a pair of binding plates disposed on both sides of the pair of terminal plates in the laminating direction, using a pressing tool from both sides in the laminating direction; a welding step of welding an edge portion of the plate laminate to edge portions of the pair of terminal plates during the compressing step; a connecting step of connecting the pair of binding plates to each other by a connector after the welding step; and a pressure-releasing step of detaching the pressing tool after the connecting step.

Method of producing plate laminate unit for heat exchanger

A welding device for a plate laminated body according to an embodiment includes a welding torch, a chuck for gripping a plurality of laminated plates with a lamination direction being in a horizontal position, and at least one support extending along the lamination direction for supporting the plate laminated body from below.

Welding device for plate laminated body in horizontal orientation and producing method for plate structure thereof

According to some embodiments, there is provided a welding device for welding outer peripheral edges of two irregular shaped plates which are overlapped, including: a rotary table to which the two irregular shaped plates in an overlapped state are fixed; a torch unit, including a welding torch positioned to face the outer peripheral edges of the two irregular shaped plates fixed to the rotary table; a first torch actuator, capable of changing an orientation and a distance of the welding torch relative to the outer peripheral edges; and a first controller, configured to control the first torch actuator, so that the orientation of the welding torch relative to a tangential line of the outer peripheral edges and the distance of the welding torch from the outer peripheral edges are kept constant along a circumferential direction of the outer peripheral edges, during rotation of the two irregular shaped plates.

Welding device and welding method

A welding device according to some embodiments includes a rotary table fixing two irregular shaped plates which are overlapped, a torch unit including a welding torch positioned to face outer peripheral edges of the two irregular shaped plates fixed to the rotary table, a torch actuator configured to move the welding torch toward and away from the outer peripheral edges, an after-shielding part mounted to the welding torch on downstream side in a rotational direction of the rotary table and having nozzles arranged along the rotational direction, configured to jet shielding gas to the outer peripheral edges, and including a first nozzle positioned upstream and a second nozzle positioned downstream of the first nozzle in the rotational direction, and a controller configured to control an orientation of the nozzle in a direction of decreasing a shielding-gas-jetting distance between the second nozzle and the outer peripheral edges welded by the welding torch.

Welding device

The ice making system by supercooling release comprises an ice thermal storage tank, a residual supercooled water generating section, and a complete releasing section. The complete releasing section and ice thermal storage tank are connected with an ice water line. Further, the ice thermal storage tank and residual supercooled water generating section are connected with a water line. The residual supercooled water generating section is supplied with water from the ice thermal storage tank to generate supercooled water, which is released from the supercooled state, ice and residual supercooled water being produced thereby. The residual supercooled water is completely released from supercooled state in the complete releasing section. The complete releasing is performed in the manner, in which the mixture containing the residual supercooled water and generated ice nuclei is spout into an erect, cylindrical container from its bottom part to generate a spiraling flow or vortex flow therein, and supercooling release of said residual supercooled water is achieved by the increased frequency of contact between said residual supercooled water and said ice nuclei through the agitation of said mixture due to said vortex flow, which continues until the flow is pushed out from the outlet provided in the upper portion of said erect, cylindrical container.

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Tokyo, Japan

Hideki Shudai