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US 4,376,886 AGranted
Method for electron beam welding
AssigneeSciaky Bros., Inc.
InventorsAlbert M. Sciaky, William J. Farrell, Julius L. Solomon
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AssigneeSciaky Bros., Inc.
InventorsAlbert M. Sciaky, William J. Farrell, Julius L. Solomon
Estimating the term…
This invention concerns a process of welding by an electron beam. The process is one in which the beam is rapidly deflected from point to point of a predetermined matrix of spots over which the beam rests for predetermined lengths of time in order to produce a predetermined distribution of energy over a defined area along the surface of the material being welded along a seam formed at the adjacent edges of workpieces. The length of time the beam is maintained at each position and the total beam power may be varied from spot to spot in order to produce a desired distribution of energy over a given area. This process is useful to avoid defects in partial penetration welds and in the welding of joints in which the gap between the edges to be welded may approach the diameter of the electron beam. The method is also useful in avoiding defects which may normally occur at the beginning and end of a weld seam.
A method of seam welding two workpieces by the electron beam welding process so as to form a seam along the full length of their adjacent edges, including the steps of:
A method of seam welding two workpieces by the electron beam welding process whose edges are separated by a gap in which the said gap width is measured dynamically by moving, at a given speed, an electron beam transversely across the gap between the two plates being welded, measuring the period between abrupt variations in intensity of electrons reflected from the said plates and translating said period to an analog voltage which defines gap width, generating a deflection coil current in accordance with a previously established law of gap width versus gap width voltage analog, passing said deflection coil current through a deflection coil associated with said electron gun so as to cause a variation in displacement of the beam on the workpieces with respect to the measured gap width.
Dependencies are inferred from the claim text.