Rolling mill for forming seamless tubes, and seamless tube-making apparatus comprising such a mill
US4091650A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1977 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Jan 17, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B17/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The specification discloses a rolling mill for forming seamless tubes from n extruded blank wherein the mandrel is driven through the milling gap in a direction tangential to the milling rolls at a speed of from about 5% to about 10% of that of the tube blank during milling. Similarly the mandrel has a length of from about 5% to about 10% of that of the tube blank. A further pair of milling rolls may be provided, adjacent the first and rotatable about mutually parallel axes orthogonal to the mutually parallel axes of rotation of the first pair of rolls in which case the mandrel will be twice as long as that required for a single milling roll gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.