Title:
A METHOD OF ROLLING RAILS, APPARATUS FOR ROLLING RAILS AND RAIL PRODUCED ACCORDING TO SAID METHOD
Document Type and Number:
WIPO Patent Application WO/2011/063935
Kind Code:
A3
Abstract:
This invention relates to a method of rolling steel rails comprising : a method of rolling steel rails comprising: providing a rail blank (5), the blank comprising a foot portion (2), a head portion (3) and a web portion (4) connecting the foot portion to the head portion; finishing the rail blank to form a steel rail (6) in a multi-stand continuous tandem finishing mill comprising at least one horizontal stand (H) and at least five four-roll universal stands (U), wherein each universal stand (Ux) only contains flat vertical rolls for forming the lower foot portion (2a) and the head portion (3a) of the rail, and wherein each universal stand (Ux) contains two shaped horizontal rolls for forming the sides (6a, 6b) of the rail and particularly the web portion (4a, 4b) of the rail, wherein the rail blank is passed only once through said finishing mill, and wherein in at least one combination of two subsequent stands Ul and Ul+1 ⋅ the rail is worked on the foot and not on the head using the flat vertical rolls in Ul and wherein the rail is worked on the head and not on the foot using the flat vertical rolls in Ul+1; or ⋅ the rail is worked on the head and not on the foot using the flat vertical rolls in Ul and wherein the rail is worked on the foot and not on the head using the flat vertical rolls in Ul+1. The invention also relates to an apparatus for carrying out said method, and to a product produced therewith.
Inventors:
SHIPTON DAMIAN GERARD (GB)
NORFOLK DARREN MICHAEL (GB)
NORFOLK DARREN MICHAEL (GB)
Application Number:
PCT/EP2010/007102
Publication Date:
November 24, 2011
Filing Date:
November 24, 2010
Export Citation:
Assignee:
TATA STEEL UK LTD (GB)
SHIPTON DAMIAN GERARD (GB)
NORFOLK DARREN MICHAEL (GB)
SHIPTON DAMIAN GERARD (GB)
NORFOLK DARREN MICHAEL (GB)
International Classes:
B21B1/085
Domestic Patent References:
| WO2004009259A1 | 2004-01-29 |
Foreign References:
| US4503699A | 1985-03-12 | |||
| US4503700A | 1985-03-12 | |||
| JPS5850101A | 1983-03-24 |
Attorney, Agent or Firm:
BODIN, Andre (Tata Steel - Group Intellectual Property ServicesP.O. Box 10000, CA IJmuiden, NL)
Download PDF: