Hot-rolling mill

Patent metadata

Field	Value
Publication number	US-9694405-B2
Application number	US-201414888522-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 3, 2013
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

The invention concerns a hot-rolling mill comprising a finishing train ( 1 ) for finishing rolling stock, in particular a strip, the finishing train ( 1 ) comprising a number of rolling stands ( 2, 3, 4 ) which follow one another in a conveying direction (F) of the rolling stock. According to the invention, in order to improve the rolling force level during finishing, there is disposed at least between two rolling stands ( 2, 3, 4 ), following one another in the conveying direction (F), at least one heat-insulating element ( 5 ) by means of which the rolling stock can be protected from heat losses.

First claim

The invention claimed is:

1. A hot rolling mill, comprising a finishing train ( 1 ) for finish-rolling a rolled stock, in particular a strip, wherein the finishing train ( 1 ) has a number of rolling stands ( 2 , 3 , 4 ) following each other in a conveying direction (F) of the rolling stock, wherein
at least between two, following each other in the conveying direction (F), rolling stands ( 2 , 3 , 4 ), at least one heat insulation element ( 5 ) is arranged that can shield the rolled stock from heat losses,
characterized in that
air blow-off means and/or water spray-off means are (is) provided in a region of the at least one heat insulation element ( 5 ) for protecting the heat insulation element from water.

2. A hot rolling mill according to claim 1 , characterized in that heat insulation elements ( 5 ) are provided between all of the rolling stands ( 2 , 3 , 4 ).

3. A hot rolling mill according to claim 1 , characterized in that distance between two stands ( 2 , 3 , 4 ) in the conveying direction amounts to less than 25 m, preferably, less than 7 m.

4. A hot rolling mill according to claim 1 , characterized in that a region a length of which amounts to at least 25% of a distance (a) between two rolling stands ( 2 , 3 , 4 ), is provided with the at least one heat insulation element ( 5 ).

5. A hot rolling mill according to claim 1 , characterized in that at least one heat insulation element ( 5 ) or a portion thereof is directly mounted on a rolling stand ( 2 , 3 , 4 ), or is integrated therein, or is mounted on a stand built-in.

6. A hot rolling mill according to claim 1 , characterized in that between the at least one heat insulation element ( 5 ) and the rolled stock or next to the at least one heat insulation element ( 5 ), at least one protection element ( 6 ) is arranged.

7. A hot rolling mill according to claim 6 , characterized in that the protection element ( 6 ) is connected with the heat insulation element ( 5 ).

8. A hot rolling mill according to claim 6 , characterized in that a plurality of protection elements ( 6 ), which are connected with each other, are provided.

9. A hot rolling mill according to claim 6 , characterized in that the at least one protection element ( 6 ) is formed of a heat-resistant material.

10. A hot rolling mill according to claim 6 , characterized in that the at least one protection element ( 6 ) is provided with cooling.

11. A hot rolling mill according to claim 1 , characterized in that the at least one heat insulation element ( 5 ) is supported for pivotal or translational movement.

12. A hot rolling mill according to claim 1 , characterized in that a region between two rolling stands ( 2 , 3 , 4 ) is free of a roller table.

13. A hot rolling mill according to claim 1 , characterized in that bridge table, guide table, and/or looper is provided in a region between two rolling stands ( 2 , 3 , 4 ).

14. A hot rolling mill according to claim 1 , characterized in that the at least one heat insulation element ( 5 ) comprises a ceramic material or consist of one.

15. A hot rolling mill according to claim 1 , characterized in that the at least one heat insulation element ( 5 ) is provided with a protective sheet ( 7 ) for protecting it from water.

16. A hot rolling mill according to claim 1 , characterized in that the at least one heat insulation element is an absorption insulation element.

17. A hot rolling mill according to claim 1 , characterized in that the at least one heat insulation element is a reflection insulation element.

18. A hot rolling mill according to claim 1 , characterized in that insulation hoods within the finishing train are heated by pass-through or pre-rolled strips and, finally, temperature-critically strips (e.g., thin strips), which use the heated insulation hoods, are rolled.

19. A hot rolling mill according to claim 1 , characterized in that operation of heat insulation hoods within the finishing train is determined based on a process model for setting the rolling train and/or dynamic change of temperature during the rolling process.

20. A hot rolling mill according to claim 1 , characterized in that heat insulation within the finishing train is expressed at continuous rolling during product mass flow, in thickness×speed of less than 650 mm×m/min.

21. A hot rolling mill according to claim 20 , wherein the mass flow is less than 500 mm×m/min.

22. A hot rolling mill, comprising a finishing train ( 1 ) for finish-rolling a rolled stock, in particular a strip, wherein the finishing train ( 1 ) has a number of rolling stands ( 2 , 3 , 4 ) following each other in a conveying direction (F) of the rolling stock, wherein
at least between two, following each other in the conveying direction (F), rolling stands ( 2 , 3 , 4 ), at least one heat insulation element ( 5 ) is arranged that can shield the rolled stock from heat losses,
characterized in that
air blow-off means and/or water spray-off means are (is) provided in a region of the at least one heat insulation element ( 5 ), and
in that between the at least one heat insulation element and the roll stock or next to the at least one heat insulation element, a plurality of protection elements ( 6 ) is provided, wherein the protection elements ( 6 ) which follow each other between the two stands ( 2 , 3 , 4 ) in the conveying direction, are offset relative to each other in a width direction of the rolled stock.

23. A hot rolling mill according to claim 22 , wherein the protection elements are in form of ribs or strips.

24. A hot rolling mill according to claim 22 , characterized in that the protection elements ( 6 ) extend linearly and/or form an angle (α) in the conveying direction (F).

25. A hot rolling mill according to claim 24 , wherein the angle (α) amounts to form 0 to 45(°).

Assignees

• Sms Group Gmbh

Inventors

• Seidel Juergen
• Kunze Volker
• Kipping Matthias
• Sudau Peter

Classifications

• B21B13/00

  Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories (B21B17/00 - B21B23/00 take precedence) · CPC title

• Y02P70/127

  Cross-Sectional Technologies · mapped topic

• B21B45/008 Primary

  Heat shields · CPC title

• Y02P70/10

  Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working · CPC title