Method for rolling on-gage head and tail ends of a workpiece

Details Method for rolling on-gage head and tail ends of a workpiece Method for rolling on-gage head and tail ends of a workpiece

G - Physics

05

D

341/43, 80/51

G05D 5/03 (2006.01) B21B 37/52 (2006.01)

Patent

CA 2031052

A METHOD FOR ROLLING ON-GAUGE HEAD AND TAIL ENDS OF A WORKPIECE ABSTRACT OF THE DISCLOSURE A method for making delivery gauge corrections at low mill speeds during threading and tailing out of a workpiece by varying the interstand tension of the workpiece. The tension between the last two stands is used with a desired tension and the delivery AGC by tension mode of an existing delivery automatic gauge control (AGC) to change the speed of the downstream stands. During the threading and tailing out phases, the delivery AGC by speed is turned off and set to zero. In the full run phase, the interstand regulators are changed to a tension by roll gap mode, and an existing delivery automatic gauge control (AGC) by speed is used to provide a stand speed reference for the downstream stands. In the full run phase, the delivery (AGC) by tension is turned off and set to zero. In the tailing out phase optionally, the tension between each stand is used in a similar manner to provide a speed reference change for each stand immediately downstream from where a tension controller is located.

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