The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 19, 1996
Filed:
Jun. 07, 1995
David Michalewski, Cheektowaga, NY (US);
Joseph A Dionne, West Seneca, NY (US);
Mark A Siuta, Lockport, NY (US);
Gemcor Engineering Corp., Buffalo, NY (US);
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.