Method and system for forming a three-dimensional frame structure
US4982891A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Aug 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D43/006
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and a system for forming a rod-like member into a three-dimensional frame structure, involving a work feed station for individually feeding a rod-like member, a bending station for bending the rod-like member having a prescribed length into a two-dimensional frame structure, a welding station for welding two mutually abutting ends of the two-dimensional frame structure of the rod-like member; and a forming station for plastically forming the two-dimensional frame structure into a three-dimensional frame structure. Typically, the two dimensional structure comprises a loop structure formed by joining two opposite ends of the rod-like member by welding, and the rod-like member consists of a pipe member. Thus, by welding the mutually abutting parts of the rod-like member together when it is formed into a two-dimensional frame, retaining the rod-like member for the welding is simplified as it involves the retaining of the rod-like member against its positional variations only in one direction. Further, by stamp forming or otherwise plastically forming the two dimensional frame structure including a loop, a three-dimensional structure having a high dimensional accuracy can be pr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.