Shaped blanks, methods for their production and improvements to the universal rolling of rails
US4518660A · kind A · utility
2Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1982 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Oct 22, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12271
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.