Pipe mill

专利名称：Pipe mill

发明人：William J. H. Chang申请号：US06/820418申请日：19860117公开号：US04776194A公开日：19881011

摘要：A pipe mill and method comprises certain improvements in pipe mills of cage-type. Edge forming roll sets, usually mounted immediately downstream of the

breakdown passes, are mounted for lateral movement to compensate for strip camberor lateral creep. In one form of the invention the edge forming rolls are adjustably fixedwith respect to each other on a mounting plate which is suspended on a pivot. Movementof the edge forming rolls from side-to-side about the pivot is obtained by powersteering each edge forming roll housing with the steering pivot located at the center ofpressure of the edge forming roll set. The steering is controlled by a closed loop systemutilizing sensors with a microprocessor. A taper pin lock holds the plate centered andagainst movement for threading purposes. Side push cylinder assemblies may be

employed to center the plate for locking. In another somewhat more sophisticated formprimarily intended for lighter gauge strip, the movement of the plate is further assistedby a double acting hydraulic cylinder controlled by the same closed loop automaticcontrol system which may include three or more sensors, at least one detecting speed,and at least two lateral motion or presence of camber in the strip. In another aspect ofthe invention the breakdown passes and/or the edge forming roll sets may be mountedfor slight angular adjustment from vertical to accommodate typical downhill or atypical

uphill forming. Such breakdown passes may also be steered to compensate for camberutilizing the same or similar closed loop control system, either by pivoting about thevertical center axis or by controlling the side-to-side gap or pinch points of thebreakdown.

申请人：CHANG; WILLIAM J. H.

代理机构：Renner, Otto, Boisselle & Sklar

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