Metal deforming – By application of fluent medium – or energy field – By kinetic energy of fluid or field
Patent
1995-06-07
1996-11-19
Jones, David
Metal deforming
By application of fluent medium, or energy field
By kinetic energy of fluid or field
72430, 2924353, B21J 730, H02K 3300
Patent
active
055751660
ABSTRACT:
A method and apparatus for forming a metal object wherein first and second coils are provided in close proximity to and in electromagnetic association with each other, the first coil is in driving association with a forming tool for forming the metal object and the first and second coils are supported in a manner allowing movement of the first coil relative to the second coil, and wherein an electric current pulse is supplied simultaneously to the first and second coils to produce a repulsive electromagnetic force sufficient to accelerate the first coil and drive the forming tool to perform a forming operation on the metal object, the pulses being shaped in accordance with a characteristic of the object being formed. The pulse shaping aspect includes matching the magnetic force based on the current pulse with the stress-strain characteristic of the object being formed. A voltage doubling network can be employed to provide increased output force. In high energy impact fastener installation apparatus, there is balancing of the applied force from both ends of the fastener during simultaneous impact and upset to eliminate transfer of force to the workpiece and supporting structure.
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Dionne Joseph A.
Michalewski David
Siuta Mark A.
Gemcor Engineering Corp.
Jones David
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