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Latest Information 2015 Vol. 457

Addition of 0.03 mm and 0.04 mm diameter wires to the product lineup of “SUMISPARK™ Gamma,” our steel-core electrical discharge machining wire

SUMISPARK™ Gamma
SUMISPARK™ Gamma
Usage example of electrical discharge machining wire
Usage example of electrical discharge machining wire

Our electrical discharge machining wire*1 named “SUMISPARK™ Gamma” is made by covering high-strength piano wire with brass (an alloy of copper and zinc). Use of gamma-brass,*2 brass containing a high percentage of zinc, as the covering material ensures higher electrical discharge machining speed as compared with conventional electrical discharge machining wires. Owing to their thinness, our electrical discharge machining wires are suitable for high-precision machining. We have introduced a new wire production process to ensure superior strength and straightness of the wires.

Sumitomo Electric has already released the “SUMISPARK™ Gamma” series of electrical discharge machining wires in diameters of 0.05 mm, 0.07 mm, and 0.10 mm. We have also developed 0.03 mm and 0.04 mm diameter wires suitable for micro-machining. These new wires are expected to be used for fabricating ultra-precision dies, medical equipment, and other apparatuses that will be required to be more precise in the future.

The Sumitomo Electric Group also manufactures and sells general-purpose brass wires and micro-machining tungsten wires. Aiming to meet the increasingly diverse needs of electrical discharge machining, the Group will continue to expand the steel-core wire product lineup.

*1
Electrical discharge machining wire: This wire is used as an electrode in electrical discharge machining. When a high-voltage wire is brought closer to a workpiece, the wire generates discharge energy. This energy is used to fabricate dies and other products. A 0.1 mm or thinner wire is usually used for high-precision machining.
*2
Gamma brass: A plating material
Sumitomo (SEI) Steel Wire Corp.

Sumitomo Electric receives an order for laying DC250 kV XLPE cables between Hokkaido and Honshu.

Sumitomo Electric has received an order from Hokkaido Electric Power Co., Inc. for the laying of underground electrical cables as part of the “Hokuto–Imabetsu DC Trunk Power Line” (transmission capacity: 300,000 kW) project for interconnecting Hokkaido and Honshu.

The objective of this project is to construct the “Hokuto–Imabetsu DC Trunk Power Line” (line length: 122 km) and thus to interconnect the Hokuto Power Conversion Station in Hokkaido and the Imabetsu Power Conversion Station in Honshu. We will lay 250 kV XLPE cables* in the Seikan Tunnel as the trans-Tsugaru Channel underground power transmission route (approx. 24 km). These cables are the world’s longest ultra-high voltage cables laid in channel tunnels. We will start the design, manufacture, and laying of the cables by the end of this fiscal year. Following completion of an acceptance test, the cables will be transferred to Hokkaido Electric Power Co. to begin power transmission in March 2019.

Cross-sectional view of the Hokuto-Imabetsu Trunk DC Power Transmission Line (source: Hokkaido Electric Power Co.’s website)
Cross-sectional view of the Hokuto-Imabetsu Trunk DC Power Transmission Line (source: Hokkaido Electric Power Co.’s website)

*XLPE cable:A cable insulated by cross-linked polyethylene

Power Cable Division

Commended by the Ministry of Health, Labor and Welfare as a FY 2015 Excellent Business Facility Employing Persons with Disabilities

Commended by the Ministry of Health, Labor and Welfare as a FY 2015 Excellent Business Facility Employing Persons with Disabilities

On September 8, Sumitomo Electric Printed Circuits, Inc. was commended by the Ministry of Health, Labor and Welfare as a FY 2015 excellent business facility employing persons with disabilities.

The award was granted to the company to recognize the fact that for about 20 years, including the days of Sumiden Circuits, Inc., the forerunner of Sumitomo Electric Printed Circuits, Inc., the company has been consistently providing employment opportunities for people with physical, intellectual, or mental disabilities, in order to contribute to the local community. Although 24 companies were commended nationwide in FY 2015, Sumitomo Electric Printed Circuits, Inc. was the only company in Shiga prefecture that was so honored.

The company provides not only employment opportunities, but also a venue where a local facility for disabled people can sell their products. By ensuring cooperation and interaction with people with disabilities, the company strives to incorporate diversity into its corporate culture. The Sumitomo Electric Group would like to take this opportunity to provide many more employment opportunities for the disabled, and to reinforce efforts to ensure that such individuals can work even more vigorously throughout the group.

Sumitomo Electric Printed Circuits, Inc.

Accelerating the ITS Business in Thailand

Signing ceremony with Genius
Signing ceremony with Genius

We have launched the project of “Disseminating Japanese Technology for Operation and Maintenance of Traffic Control System for Improving Traffic Problems in Bangkok,” which has been adopted by the Japan International Cooperation Agency (JICA). The purpose of this project is to introduce a traffic control pilot system, to demonstrate the system’s effects in mitigating traffic congestion, to instruct local officials in the system’s technology in order to operate and maintain the new system, and to help them understand the benefits and importance of long-term system operation.

In addition, we have concluded an agreement with Thai Genius Traffic System Company Limited (Genius), a major Thai company that manufactures and sells equipment for traffic control systems,  regarding cooperation in the field of the country’s intelligent transport systems (ITS). While cooperating with Genius on the JICA project above, we will work together with Sumitomo Electric (Thailand) Ltd, a group company, thus aiming to expand our ITS business in Thailand and also contribute to improving the current traffic environment in the country.

Systems & Electronics Division

Mr. Konishi and Mr. Tamura of Sumitomo Athletics Club Compete in the World Athletics Championships (Beijing)

At the 15th IAAF World Championships in Athletics, held in Beijing August 22 to 30, Yuta Konishi and Tomoya Tamura, members of our athletics club, competed in the 4 × 400 m hurdles and 4 × 400 m relay, respectively.

Although this was the first time that members of our athletics club competed in the world championships, both Mr. Konishi and Mr. Tamura did their best on the international stage.

On their behalf, your warm support is most appreciated.

Tomoya Tamura
Tomoya Tamura
Yuta Konishi
Yuta Konishi
HR & Administration Division

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