| 摘要 |
Method for the manufacture of the cylindrical mantle (10) of the rolls or cylinders of a paper machine out of a corrosion-proof metal or alloy material, in particular of refined steel. In the method, out of a plate material, oblong plate blanks (20A) of a length equal to the total length of the roll mantle to be manufactured are cut. The plate blanks (20A) are machined or bent to mantle portions (20) of a cross-sectional shape equal to a part of a circular ring. Out of the mantle portions (20), the cylindrical mantle of a roll or cylinder is assembled by joining the mantle portions (20) together by means of axial welding joints (14) prepared by electron-beam welding performed in the vacuum chamber of an electron-beam apparatus by using a number of mantle portions (20) per one roll mantle (10). Further, a roll or cylinder manufactured by means of the method is described. |
