Accession Number : ADD013149

Title :   Electromagnetic Induction Method and Apparatus Therefor for Collapsing and Propelling a Deformable Workpiece.

Descriptive Note : Patent, Filed 20 Feb 85, patented 14 Apr 87,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Rose,Millard F ; Fitch,Osa E

Report Date : 14 Apr 1987

Pagination or Media Count : 16

Abstract : An improved electromagnetic induction method and apparatus is described for simultaneously collapsing and propelling a deformable annular-shaped workpiece of relatively lightweight construction in a direction outwardly of the apparatus and along its axis wherein the apparatus is made up of seven different embodiments for carrying out the method. Each apparatus is generally comprised of a framework. The framework includes at least one pulse coil means; and a power supply circuit is connected to the pulse coil means. Annular-shaped surface portions of various embodiments of the apparatus define part of an aperture or passageway for receiving a workpiece and function to position the workpiece in mutual inductance relation to the coil means. The pulse coil means, when energized after positioning of a workpiece in an apparatus, causes the formation of a series of magnetic forces acting on the workpiece that causes progressive collapsing of the workpiece in a direction towards the axis of the apparatus so as to form a slug of solid-like construction and approximately cylindrical or spherical shape.

Descriptors :   *PATENTS, *MAGNETIC FORCES, *MATERIAL FORMING, DEFORMATION, FABRICATION, ELECTROMAGNETIC INDUCTION, PULSE GENERATORS

Subject Categories : Mfg & Industrial Eng & Control of Product Sys
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE