Electrically-assisted tooth-shaped rolling process and device for preparing gradient ultrafine-grained sheet
US12427561B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2025 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | May 21, 2045 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B37/74
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electrically-assisted tooth-shaped rolling process and device for preparing a gradient ultrafine-grained sheet is provided. A rib-forming pressure roller, a rib-flatting pressure roller and a straightening pressure roller are adopted to sequentially roll relative to a surface of a sheet under a preset pressing force. The surface of the sheet is driven, under a rib forming process, to generate large deformation in micro-area to crush and refine grains, and under a rib flatting process to generate reverse large deformation in micro-area. Large deformation areas in the rib forming process and the rib flatting process are staggered to further crush and refine the grains. A cold straightening process drives the sheet to be restored to an original shape, so that the sheet becomes the gradient ultrafine-grained sheet with a decreasing grain size gradient from an interior to a surface layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.