Position regulation of a charge carrier beam

Details Position regulation of a charge carrier beam Position regulation of a charge carrier beam

1980-01-08

1982-09-07

Truhe, J. V.

Electric heating

Metal heating

By arc

219121EC, 219121EV, 250397, B23K 1500

Patent

active

043485766

ABSTRACT:
In a charge carrier beam machine, as an electron beam welding machine, a system for establishing the relative position of a beam impingement spot on a workpiece surface and a machine reference position, as a beam gun axis, comprises an X-ray sensor defining at least one measuring field boundary intersecting the workpiece surface at a line of intersection spaced from the gun axis. During repetitive measuring periods, the beam is deflected from the normal working position along a measuring path, which crosses the line of intersection, and a signal functionally related to the period of time the beam needs to travel from a reference position along the measuring path to the line of intersection is produced. This signal comprises the desired information about the relative position and can be used in a regulating apparatus for maintaining a desired relationship. Two sensors having differently oriented measuring field boundaries can be used to detect any deviations of the workpiece surface from a desired plane and the output signals of these detectors are useful for maintaining a desired positional relationship between a welding site and a filler wire supplied to the welding site. The shape of the cross-section of the beam may be altered during the measuring period to improve the accuracy of the measurement.

REFERENCES:
patent: 2793281 (1957-05-01), Steigerwald
patent: 3417223 (1968-12-01), Steigerwald et al.
patent: 3534386 (1970-10-01), Mercer
patent: 3534387 (1970-10-01), Sanderson et al.
patent: 3775581 (1973-11-01), Sciaky
Automatic Welding, (G.B.); vol. 25, No. 1, Jan. 1972; pp. 38-40; "A Seam Tracking System for Electron Beam Welding", by F. N. Ryzhkov et al., Voronezh Polytechnic Institute.

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