为克服手工气压焊接的缺点,新日本制铁公司开发了使焊接条件定量化、标准化和焊接装置机械化、焊接程序自动化的粗直径钢筋自动气压焊接法。这一方法现已用于钢筋笼施工法和单体施工法,并可多接头(多达12根钢筋)同时焊接。在工程中用自动气压焊接法已焊接了D9～D51钢筋的50万个接头。自动焊接法的装置示意见图1。燃烧器驱动机种 In order to overcome the disadvantages of manual pressure welding, Nippon Steel Corporation developed an automatic pressure welding method for large-diameter steel bars that quantifies and standardizes welding conditions, and mechanizes the welding device and automates welding procedures. This method is now used for the reinforcement cage construction method and monomer construction method, and can be welded simultaneously with multiple joints (up to 12 steel bars). In the project, 500,000 joints of D9-D51 steels have been welded by automatic pressure welding. The automatic welding method is schematically shown in Figure 1. Burner drive type