EP 4289522 A1 20231213 - ROLLING MILL ROLL FOR ROLLING RAILWAY AND TRAM RAILS
Title (en)
ROLLING MILL ROLL FOR ROLLING RAILWAY AND TRAM RAILS
Title (de)
WALZWERKSWALZE ZUM WALZEN VON EISENBAHN- UND STRASSENBAHNSCHIENEN
Title (fr)
CYLINDRE DE LAMINOIR POUR LAMINER DES RAILS DE CHEMIN DE FER ET DE TRAMWAY
Publication
Application
Priority
PL 44142822 A 20220609
Abstract (en)
The subject-matter of the invention is a rolling mill roll used for rolling railway and/or tramway rails, especially of leading roll and finishing roll, wherein a pass of the working surface of the roll forming the bottom surface of rail foot is convex, while the lines forming the roll pass convexity are rounded with a radius at their contact point, and the size (S) of convexity of roll passes calculated from the straight line joining the ends of the roll pass intended to form the rail foot is in the range of 0.5 mm to 2.0 mm for the leading roll pass and in the range of 0.2 mm to 0.75 mm for the finishing roll pass.
IPC 8 full level
B21B 1/085 (2006.01)
CPC (source: EP PL)
B21B 1/085 (2013.01 - EP PL); B21B 1/0855 (2013.01 - PL); B21B 1/34 (2013.01 - PL); B21B 13/04 (2013.01 - PL); B21B 27/02 (2013.01 - PL)
Citation (applicant)
CN 110180889 A 20190830 - BERIS ENG & RES CORP
Citation (search report)
- [A] CN 201632479 U 20101117 - PANGANG GROUP PANZHIHUA STEEL, et al
- [A] US 4400962 A 19830830 - MICHAUX JACQUES M [FR]
- [X] CN 102049416 A 20110511 - PANZHIHUA IRON & STEEL RES, et al
- [X] "Improved Rail or Beam", RESEARCH DISCLOSURE, KENNETH MASON PUBLICATIONS, HAMPSHIRE, UK, GB, vol. 576, no. 4, 1 April 2012 (2012-04-01), pages 260, XP007141218, ISSN: 0374-4353
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 23460020 A 20230522; PL 44142822 A 20220609