| 摘要 |
PROBLEM TO BE SOLVED: To enhance the total balance of the quality of a pressure-welded part, work efficiency and economical efficiency by attaining complete combustion of fuel gas including the quantity of entrainment of oxygen from the atmosphere when performing gas pressure welding of members to be joined such as reinforcing bars and rails by using the fuel gas other than acetylene gas. SOLUTION: When performing the gas pressure welding of the members to be joined by mixing gaseous oxygen with the fuel gas which is expressed by a general formula of C<SB>k-1</SB>H<SB>2k</SB>(k is a natural number), the volume ratio of the feed rate of the fuel gas to the feed rate of the gaseous oxygen is taken as 1:(1.25k-1) when there is no butting gap between the members to be joined. Only the feed rate of the fuel gas per unit time is increased as the but gap between the members to be joined is made larger. COPYRIGHT: (C)2009,JPO&INPIT
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