Low amperage electromagnetic apparatus and method for uniform rivet upset
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United States of America Patent
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-
Mar 21, 1995
Grant Date -
N/A
app pub date -
Dec 6, 1991
filing date -
Dec 6, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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