| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2010: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
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| Research Abstract |
A new heat input estimation method based on local heat transfer for preheating of Oxyfuel gas cutting is developed, and the relation of the total calorific value and heat input properties for Hydrogen- gas and fossil gas. A thermal FE code with moving coordinates analysis function is developed. The relation of the gas heat transient characteristics to the work piece temperature ahead of the cutting kerf and the total heat input is examined by using this code. It is found that the maximum cutting speed, at which the work piece’s heating face temperature ahead of the cutting kerf is higher than the kindling temperature, becomes higher, and the total heat input per unit cutting length becomes smaller when preheating is performed by Hydrogen gas in place of fossil gas.
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