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US 4,357,517 AGranted
Electron beam welding with beam focus controlled responsive to absorbed beam power
AssigneeCompagnie Francaise des Petroles
InventorsBruno J. M. de Sivry, Claude R. Carsac, Christian Bonnet
Life of this patent
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Abstract
In a process for electron beam welding, the electron beam welding gun is controlled to maintain the power absorbed by the pieces being welded substantially constant. In a preferred embodiment the intensity of the electron beam transmitted by the pieces being welded, which corresponds to the power absorbed, is measured, compared with a preset intensity and the difference used to control the focussing current supplied to the gun to maintain the intensity of the transmitted beam constant.
Claims7
A process for regulating an electron beam welding of pieces, comprising the steps of:
- measuring the power of the electron beam emitted from an electron gun;
- measuring the power passing through said pieces to be welded;
- substracting said measured power passing through said pieces from said measured power of said gun electron beam;
- comparing said difference to a preset constant value obtained from previous tests for getting good mechanical and metallurgical characteristics of the weld;
- and
- utilizing a signal resulting from this comparison for adjusting a focusing of said electron beam so as to produce a weld having said good mechanical and metallurgical characteristics.
3 more elements
Dependencies are inferred from the claim text.