Device for automatic adjustment of the roll gap in a mill stand

Details Device for automatic adjustment of the roll gap in a mill stand Device for automatic adjustment of the roll gap in a mill stand

1977-04-18

1978-04-11

Mehr, Milton S.

Metal deforming

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

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

72 20, 72245, B21B 3708

Patent

active

040832139

ABSTRACT:
A device for automatic adjustment of the roll gap in a mill stand has at least one load cell for each side of the stand. The load cells are mounted under chocks of at least one of the rolls and are adapted to absorb a rolling force. For prestressing the stand, the device is provided with hydraulic cylinders which are mounted so as to have no effect on the load cells. The device also incorporates three-chamber fluid (oil) pressure regulators, one for each load cell, communicating through a first end chamber thereof with chambers of the hydraulic cylinders at the respective side of the mill stand, through a midchamber thereof with the load cell chamber, and through a second end chamber with a constant-pressure fluid source. In addition, the device is fitted with regulated pressure valves, one for each load cell, said valves having throttle chambers communicating with a variable-pressure fluid source and with a midchamber of the three-chamber fluid pressure regulators, a control chamber of said valves being in communication with chambers of the load cells.

REFERENCES:
patent: 3427839 (1969-02-01), Neumann
patent: 3686907 (1972-08-01), Soholov et al.

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