Method and apparatus for fastening
US5222289A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Oct 25, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53013
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus (10) for fastening upper and lower workpieces (20, 22) without movement of the workpieces. The apparatus is provided with a frame having upper and lower portions (24.1, 24.2) carrying upper and lower riveting ram assemblies (26, 28), respectively. Each riveting ram assembly includes a buck ram (30 or 32), a buck ram moving assembly (62 or 90, 92), a pressure foot (34 or 36), a pressure foot moving assembly (38 or 40), a buck ram position measuring device (74 or 104), and a pressure foot position measuring device (78 or 108). The upper pressure foot moving assembly (38) further includes an upper pressure foot compensation cylinder assembly (42). The apparatus also includes a load cell (112) carried by one of the buck rams for sending a force signal in response to the force being applied to the fastener during upset and thereafter. A programmable process controller (82) is provided which is capable of having programmed into it the length of a fastener, and a deflection compensation table which sets forth the deflection of a portion of the frame during upset. The controller modulates sequential operation of the various moving assemblies during operation to move …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.