Hot and cold composite formed square and rectangular steel tube with thickened corners and production method
US11618066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2021 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Jan 18, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hot and cold composite formed square and rectangular steel tube and a production method for the same are provided. The radius of an outer corner of the square and rectangular steel tube meets the following conditions: when t is less than or equal to 6 mm, R is greater than 0 and less than 2.0 t; when t is greater than 6 mm and less than or equal to 10 mm, R is greater than 0 and less than 2.5 t; when t is greater than 10 mm, R is greater than 0 and less than 3.0 t, wherein t is the wall thickness of a straight tube part of the square and rectangular steel tube; R is the radius of each of the outer corners of the four corners of the square and rectangular steel tube; and the wall thickness of each corner of the square and rectangular steel tube is between 1.0 t and 1.8 t.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.