Method for manufacturing large mill cylinders

摘要

A plurality of cylinder sections are welded together to form a milling cylinder, wherein, prior to welding, individual cylinder sections are machined in the region of their end edges to be welded, using at least one machining tool. Furthermore, the cylinder section to be machined is provided with inwardly oriented bracing means, wherein a temporary axle is fitted on the bracing means such that the temporary axle is oriented in the mid-axis of the cylinder section, and wherein the at least one machining tool is fastened to the temporary axle by means of a holder and the machining tool is rotated relative to the cylinder section about or with the temporary axle during the machining of the end edges.

主权项

1. A method of manufacturing a mill cylinder, the mill cylinder comprising a plurality of cylindrical sections, the method comprising steps:
providing a first cylindrical section and a second cylindrical section, the second cylindrical section having inside and outside diameters substantially equal to inside and outside diameters of the first cylindrical section, the first cylindrical section comprising:
a circumferential surface, an end edge, and a reinforcing member; the reinforcing member including a central disk having an opening; a plurality of radial stays extending from the central disk to the circumferential surface; temporarily situating the first cylindrical section on an axle that passes through the opening; operably coupling a machining tool to the axle; causing the machining tool to rotate such that the machining tool machines an inside face and an outside face of the end edge to form a first web; abutting the first web with a second web of the second cylindrical section, the first and second webs having a uniform shape where abutting one another; welding the first web to the second web by placing welding material in an interior channel formed by the first and second abutting webs and in an exterior channel formed by the first and second abutting webs; and dismantling the reinforcing member.