Low amperage electromagnetic apparatus and method for uniform rivet upset
US5398537A · kind A · utility
39Cited by
49References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1991 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Dec 6, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53774
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A riveting apparatus and method wherein riveting upset force is provided by a solenoid operated plunger wherein the current provided to the coil of the solenoid is controlled such as by a servo-controller to achieve rivet upset time versatility whereby cracking may be minimized while maintaining high quality rivet upset uniformity. A condition such as plunger velocity or applied force during upset is sensed, and signals indicative of the condition are fed back to the servo-controller so that the condition may be instantaneously adjusted as the plunger is moved for rivet upset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.