Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1997-02-13
1999-04-13
Hughes, S. Thomas
Metal working
Method of mechanical manufacture
With testing or indicating
2940709, 29703, 29715, 227 4, 227 7, B23P 1100, B23P 2100, B21J 1528
Patent
active
058932038
ABSTRACT:
A process for seating a tight-fitting headed fastener in a hole in a workpiece so that the head of the fastener contacts the surface of the workpiece. The process includes inserting a distal end of the fastener, opposite its headed end, into the hole so that the distal end is tightly wedged into the hole and the headed end of the fastener is spaced from the workpiece surface. A driver of an electromagnetic impulse actuator is extended into contact with the fastener head, and the position of the driver when it is in contact with the fastener head is sensed and recorded to determine how far the fastener must be driven into the hole to seat the fastener head against the workpiece surface. A desired off-set distance of the driver from the fastener head is calculated which will result in seating of the fastener when the electromagnet impulse actuator is actuated, but will not cause excessive impact of the fastener head with the workpiece surface. The driver is withdrawn to the desired offset distance, and the electromagnetic impulse actuator is actuated to propel the driver into contact with the fastener head to seat the fastener against the workpiece surface.
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Hughes S. Thomas
Neary J. Michael
Nelson Lawrence W.
The Boeing Company
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