Shaped blanks, methods for their production and improvements to the universal rolling of rails
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United States of America Patent
Stats
-
May 21, 1985
Grant Date -
N/A
app pub date -
Oct 22, 1982
filing date -
Nov 4, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The primary blank 1, which is to be transformed into a finished rail by means of universal passes, edging passes and a finishing pass, is characterized by a symmetric `.UPSILON.` section the thickness of which always varies in the same way. It is designed to be shaped exclusively in open grooves. This primary blank 1 is roughed in a specific manner in a universal stand and undergoes a strong forging which improves the quality of the finished rail. A secondary blank is then formed which has a special shape allowing the production by universal rolling of a very accurate profile of the finished rail.
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