Method and device for deforming a workpiece made of a material having an exponential tensile stress-strain behavior into a thin-walled, hollow shell
US7243517B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jul 12, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention relates, among other things, to a method for forming a workpiece (240) of a material having an exponential tensile stress-strain behavior into a thin-walled, hollow shell (243). In this method, the workpiece (240) is clamped on its periphery and is actively rotated about its center line (M). A freely rotatable spinning die (4) having an external side (4a) with the desired shell shape (243) is pressed with a suitable pressure force against a workpiece side (24a). At least one path-controlled spinning roller (14, 17) is pressed against the other workpiece side (24b) so that the rotating workpiece (240) is formed into shell (243) exclusively by the local pressure forces, the relative velocity between the workpiece (240) and the at least one spinning roller (14, 17) and the force exerted on the workpiece (240) by the at least one spinning roller (14, 17) and the spinning die (4) being matched to one another such that the pressure forces applied to the workpiece (240) are below the yield strength of the workpiece (240). In addition, the present invention relates to a device for carrying out the method. Moreover, the present invention relates to a method and a devic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.