| 摘要 |
PURPOSE:To perform sound welding without producing any clearances between gauges and an inner and outer wheels, by pushing the thin gauges against the inner and outer wheels and closely adhering the gauges to the wheels. CONSTITUTION:A band which is prepared by working a rolled plate for boiler in the form of a circular arc is used as a spacer and plural gauges 61-65 and 71-75 are produced by precisely automatically cutting the band at regular intervals in the circumferential direction. Positioning is performed by pushing the gauges 61-65 and 71-75 against the outer peripheral surface of an inner wheel 2 and inner wall of an outer wheel 3 and, at the same time, nozzle wings 41-45 are put between adjacent gauges. After such preparatory works are finished, welding is performed. |
