Process for modifying the section of a railway rail and rail thus obtained
AssigneeKihn
InventorsJean-Pierre Allegrucci, Gerard Testart
Life of this patent
Estimating the term…
Abstract
The process consists in increasing the height of the rail to the detriment of the thickness of the web (16) and of the flange (18). Firstly, the thickness of the upper part of the web (16) below the head (14) is reduced by machining and, next, the rest of the web (16) and the flange (18) of the rail (10) are heated up and deformed by forging. This process avoids hardness modifications of the running surface of the rail.
Claims9
Process for modifying a section of a railway rail comprising a flange, a web and a head, by increasing a height of the rail to a detriment of a thickness of the web and of the flange, the process comprising the steps of:
- machining an upper part of the web below the head to reduce a thickness of the upper part of the web;
- directing heat to only a lower part of the web, and the flange of the rail;
- and
- deforming heated portions of the rail to increase the height of the rail.
A method of reshaping a rail section, the rail section including a head, a web and a flange, the method comprising the steps of:
- machining a first portion of the web near the head to reduce a thickness of the first portion to a predetermined web thickness;
- selectively heating the flange and a second portion of the web near the flange to a forging temperature while maintaining the head below a predetermined temperature;
- and
- deforming the second portion of the web and the flange while heated to the forging temperature to increase and reshape the rail section.
Dependencies are inferred from the claim text.