VARIABLE FLOW RATE ROLL COOLANT VALVE FOR ROLLING CONTROL, ROLLING CONTROL DEVICE, AND METHOD OF ADJUSTING COOLANT INJECTION AMOUNT FROM INJECTION NOZZLE IN ROLLING CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a variable flow rate roll coolant valve for rolling control which can gradually adjust the injection amount of a coolant, a rolling control device, and a method of adjusting coolant injection amount from an injection nozzle in the rolling control device.;SOLUTION: A variable flow rate roll coolant valve for rolling control controlling coolant injection amount for cooling work roll and/or a rolling material, is equipped with a stepping motor; a moving core coupled to a shaft of the stepping motor; and a balance piston type poppet which is adjusted an opening degree of a pilot hole for making a pilot fluid frow out from a pilot space, by the moving core. A position of the poppet is adjusted by a relationship of the amount of the pilot fluid flowing into the pilot space at a poppet rear end through an orifice of the poppet, and the amount of the pilot fluid flowing out to a poppet front end from the pilot space through the pilot hole, thereby adjusting coolant injection amount.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT