Stretch roll forming apparatus using frusto-conical rolls
US6286352A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2273/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A stretch roll forming apparatus has multiple roll forming stations arranged serially so that a sheet metal workpiece can be advanced through the stations in sequence. Each station includes a pair of roller dies supported by an inboard support station and by an outboard support station, in spaced apart relationship, so that the roller dies are each rotatable about a horizontal axis. The roller dies are configured to shape a sheet metal workpiece which is advanced between them. At least one of the roll forming work stations is a stretch roll forming work station. In this station, the roller dies each have a frusto-concial shape. The roller dies are positioned such that the taper of one extends from the inboard support to the outboard support while the taper of the other extends from the outboard support to the inboard support. When a sheet metal workpiece is advanced between the roller dies of the stretch roll forming station, one longitudinal edge of the workpiece is stretched relative to the other longitudinal edge. This gives the workpiece a longitudinal curvature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.