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Title: Control and monitoring method and system for electromagnetic forming process

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.

Inventors:
 [1];  [1]
  1. (Idaho Falls, ID)
Issue Date:
Research Org.:
EG & G IDAHO INC
OSTI Identifier:
867553
Patent Number(s):
4962656
Assignee:
United States of America as represented by United States (Washington, DC) INEEL
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
control; monitoring; method; electromagnetic; forming; process; improvement; workpiece; characteristics; geometry; electrical; conductivity; quality; magnetic; permeability; determined; current; voltage; workcoil; electromagnet; power; supply; provides; field; produced; form; dynamic; interaction; fields; information; pertinent; physical; condition; available; determination; obtained; deriving; time; derivatives; addition; extended; injecting; signals; response; physical condition; monitoring method; magnetic permeability; supply provides; electromagnetic fields; field produced; process control; electromagnetic field; magnetic field; magnetic fields; power supply; electrical conductivity; provides information; provides current; forming process; electromagnetic forming; time derivative; /72/29/

Citation Formats

Kunerth, Dennis C., and Lassahn, Gordon D. Control and monitoring method and system for electromagnetic forming process. United States: N. p., 1990. Web.
Kunerth, Dennis C., & Lassahn, Gordon D. Control and monitoring method and system for electromagnetic forming process. United States.
Kunerth, Dennis C., and Lassahn, Gordon D. Mon . "Control and monitoring method and system for electromagnetic forming process". United States. https://www.osti.gov/servlets/purl/867553.
@article{osti_867553,
title = {Control and monitoring method and system for electromagnetic forming process},
author = {Kunerth, Dennis C. and Lassahn, Gordon D.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

Patent:

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