| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
A fiber laser was used in order to achieve stable consumable-electrode welding with pure Ar shielding gas (Ar-GMA). Ar-GMA welding is unstable welding because of a long column of liquid molten metal (CLM), which is generated at the wire tip. This long CLM causes arc instability and irregular short-circuit. Therefore, to stabilize the Ar-GMA welding, it is necessary to shorten this CLM. To shorten the CLM, we have developed a method for cutting the CLM by using of a fiber laser.
Cutting conditions using a fiber laser were investigated. By using appropriate cutting conditions, we were able to control the welding behavior of Ar-GMA welding.
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