Method for producing beam blank for universal beam
US4420961A · kind A · utility
8Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1982 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Jun 10, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B1/088
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rough rolling process for forming a beam blank for a universal beam from a flat slab, comprises the steps of making a triangular slit of a predetermined apical angle in each of longitudinal side edges of said flat slab and gradually deepening said slit with the apical angle thereof fixed; and widening the slit after the depth of said slit has reached a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.