Patent ID: 9452498
Filing Date: 2016-09-27
CPC Classification: B23K,D21F,Y10T

Claim Text:
1. A process for manufacturing a steel Yankee cylinder, comprising the following steps: a.) cutting and curling individual shell plates at a specific manufacturing location; b.) welding the shell plates together to form at least two cylinder sections, each with an inside, an outside, and axially spaced end faces, at the manufacturing location; c.) transporting the individual cylinder sections from the manufacturing location to an assembly location; d.) welding the individual cylinder sections together at adjacent end faces at the assembly location to form a complete cylindrical shell surface of the Yankee cylinder, wherein a length of the complete cylindrical shell surface is at least 5 meters and the assembly location is a paper or tissue production plant; e) attaching at least one end cover to at least one of the individual cylinder sections after one of steps b.), c.) or d.); and f) wherein step d.) is performed, at least from one side, by a narrow gap welding process using a mobile welding robot or an electro-mechanical welding carriage placed inside the individual cylinder sections.