Universal roll stand and method of operating same

Details Universal roll stand and method of operating same Universal roll stand and method of operating same

1990-06-01

1992-02-04

Spruill, Robert L.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72225, 72234, 364472, B21B 3700

Patent

active

050850652

ABSTRACT:
A workpiece is advanced through a succession of universal roll stands each having a pair of rotatably positively driven horizontal rolls engaging horizontal surfaces of the workpiece and a pair of idling vertical rolls engaging vertical surfaces of the workpiece and normally only rotationally entrained by engagement with the advancing workpiece. The roll stand is controlled by detecting the peripheral speeds of the vertical rolls and generating outputs corresponding thereto and then comparing the outputs to set points and generating error signals corresponding to the difference. The peripheral speed and position of the horizontal rolls are detected to establish same as operating characteristics. Finally the peripheral speeds of the vertical rolls are varied in accordance with the respective differences by varying at least one of the operating characteristics. Such variation is done by changing the crosswise position and/or the peripheral speed of the horizontal rolls, as the vertical/horizontal speed ratio is affected both by amount of vertical compression and amount of tension in the workpiece.

REFERENCES:
patent: 4030326 (1977-06-01), Morooka et al.
patent: 4236216 (1980-11-01), Anbe
patent: 4248072 (1981-02-01), Hasegawa et al.
patent: 4617814 (1986-10-01), Kotera
patent: 4625536 (1986-12-01), Morooka
patent: 4705969 (1987-11-01), Gross
patent: 4706479 (1987-11-01), Tominaga
patent: 4864838 (1989-09-01), Engel et al.

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