公开(公告)号：US20230149996A1

公开(公告)日：2023-05-18

申请号：US17995808

申请日：2021-03-08

Applicant: ABB Schweiz AG

Inventor： Markus Lindgren ,  Christer Sjögren ,  Carl-Fredrik Lindberg

IPC: B21B37/74 ,  G01B21/20 ,  B21B38/02

CPC classification number: B21B37/74 ,  B21B38/02 ,  G01B21/20

Abstract: A method for detecting a faulty cooling unit in a set of cooling units configured to provide a coolant to work rolls arranged to process a work item therebetween, the method including: varying the flow rates of the coolant ejected from a sub-set of the cooling units; in response to varying the flow rates, determining a flatness variation value of the work item for at least each of the cooling units in the sub-set of cooling units, the flatness variation value being indicative of the work item flatness variation downstream of the work rolls; and detecting a faulty cooling unit based on comparing the flatness variation values to a reference flatness variation value.

公开(公告)号：US09599401B2

公开(公告)日：2017-03-21

申请号：US14249028

申请日：2014-04-09

Applicant: ABB Schweiz AG

Inventor： Michael Lundh ,  Xiaojing Zhang ,  Jan-Erik Eriksson ,  Lidong Teng ,  Carl-Fredrik Lindberg

IPC: F27B3/28 ,  F27D19/00 ,  F27D27/00 ,  C22B4/08 ,  C21C5/52 ,  F27B3/08

CPC classification number: F27D19/00 ,  C21C5/5211 ,  C21C2005/5276 ,  C21C2005/5288 ,  C22B4/08 ,  F27B3/085 ,  F27B3/28 ,  F27D27/00 ,  F27D2019/0003 ,  F27D2019/0006 ,  Y02P10/216

Abstract: A method and device for controlling a melting and refining process in an electric arc furnace for melting a metal, wherein the electric arc furnace includes molten and solid metal and a slag layer on the surface of the molten metal, wherein an electromagnetic stirrer is arranged for stirring the molten metal. The method includes calculating/determining masses of the molten and solid metal at a point of time, wherein the calculation is based on initial values of the molten and solid metal, an arc power supplied to the electric arc furnace, and temperatures of the molten and solid metal, determining a stirring power based on the calculated/determined masses, and supplying the determined stirring power to the electromagnetic stirrer.

公开(公告)号：US11712724B2

公开(公告)日：2023-08-01

申请号：US17995808

申请日：2021-03-08

Applicant: ABB Schweiz AG

Inventor： Markus Lindgren ,  Christer Sjögren ,  Carl-Fredrik Lindberg

IPC: B21B37/74 ,  B21B38/02 ,  G01B21/20

CPC classification number: B21B37/74 ,  B21B38/02 ,  G01B21/20

Abstract: A method for detecting a faulty cooling unit in a set of cooling units configured to provide a coolant to work rolls arranged to process a work item therebetween, the method including: varying the flow rates of the coolant ejected from a sub-set of the cooling units; in response to varying the flow rates, determining a flatness variation value of the work item for at least each of the cooling units in the sub-set of cooling units, the flatness variation value being indicative of the work item flatness variation downstream of the work rolls; and detecting a faulty cooling unit based on comparing the flatness variation values to a reference flatness variation value.