Process for manufacturing a yankee cylinder

摘要

The invention relates to a process for manufacturing a steel Yankee cylinder (1), where the Yankee cylinder (1) is welded together from individual pre- or finish-machined cylinder sections (8, 9, 10).;The invention also relates to a Yankee cylinder (1) that is manufactured using the manufacturing process according to the invention.

主权项

1. A process for manufacturing a steel Yankee cylinder, comprising the ordered steps of:
a.) cutting and curling individual shell plates; b.) welding the shell plates together (6) to form individual cylinder sections (8, 9, 10), each section having an inside (15), an outside (16), and axially opposite end faces; c.) mechanically lathing the individual cylinder sections on the inside and on the end faces and mounting two end face covers (3, 4) on respective two cylinder sections; d.) welding the individual cylinder sections together at respective end faces with inner and outer seam welds to form a complete shell of said Yankee cylinder wherein the inner seam welds are by narrow gap welding using an electro-mechanical welding carriage inside the shell and a length of the complete shell of said Yankee cylinder is at least 5 meters; e.) wherein the inside of each individual cylinder section is in a substantially finish-machined condition before the individual cylinder sections are welded together; and f.) wherein any machining performed inside the shell after forming the complete shell, is only for finishing the inner seam weld (13).