| 摘要 |
PURPOSE:To reduce the man-hour by providing a beveling gap in a groove shape on the outer periphery of a diaphragm and by arranging the gap part for slag pool at the lower part thereof, then by performing an electroslag welding by closing a slag pool part with a copper made backing sheet. CONSTITUTION:Two sheets of flanges 4, two sheets of webs 5, four sheets of diaphragms 2 and four units eight sheets of backing sheets 7 which forms the beveling gap 6 on the four corners of the outer periphery thereof are prepared. The gap part 6a for slag pool enlarging the cross sectional area is provided at the lower end of the beveling gap 6 at both sides of the diaphragm 2 and closed by the copper made backing sheet 8. The opposite side is then welded by performing an electroslag welding on the beveling gap 6 and further reversing a box column by 90 deg.. The man-hour can be reduced in this way since the nozzle through hole and the through hole of the deposited metal become unnecessary and the processing of a welding toe part is omitted as well. |
