Metal deforming – By application of fluent medium – or energy field – By kinetic energy of fluid or field
Patent
1989-06-30
1990-10-16
Jones, David
Metal deforming
By application of fluent medium, or energy field
By kinetic energy of fluid or field
72707, 294192, 29DIG95, B21D 2614
Patent
active
049626566
ABSTRACT:
A process, system, and improvement for a process for electromagnetic forming of a workpiece in which characteristics of the workpiece such as its geometry, electrical conductivity, quality, and magnetic permeability can be determined by monitoring the current and voltage in the workcoil. In an electromagnet forming process in which a power supply provides current to a workcoil and the electromagnetic field produced by the workcoil acts to form the workpiece, the dynamic interaction of the electromagnetic fields produced by the workcoil with the geometry, electrical conductivity, and magnetic permeability of the workpiece, provides information pertinent to the physical condition of the workpiece that is available for determination of quality and process control. This information can be obtained by deriving in real time the first several time derivatives of the current and voltage in the workcoil. In addition, the process can be extended by injecting test signals into the workcoil during the electromagnetic forming and monitoring the response to the test signals in the workcoil.
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Kunerth Dennis C.
Lassahn Gordon D.
Dvorscak Mark P.
Gottlieb Paul A.
Jones David
Moser William R.
The United States of America as represented by the United States
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