Steigerwald Strahltechnik Gmbh

Johannes Koy

Wilhelm Scheffels

Karl H Steigerwald

Franz Rappold

Dieter Konig

Peter Anderl

Walther Hiller

Erwin Kappelsberger

Clauspeter Monch

Disclosed is a method for producing an elongated weld seam in a workpiece by the use of a beam of charged particles, in particular an electron beam. According to the disclosed method, a beam of charged particles is directed to impinge on a workpiece and has a selected beam current, a selected accelerating voltage and is focused by a focusing field of a selected field strength. In order to produce a weld seam there is provided a relative motion between the charged particle beam and the workpiece, to move the point of impingement along the workpiece. The relative motion has a predetermined selected instantaneous velocity. The depth of penetration of the charged particle beam into the workpiece is varied by changing a parameter selected from the group consisting of the beam current and the velocity of relative motion. According to the improvement of the invention, simultaneous with the changing of the depth of penetration, there is provided an active control to change at least one parameter selected from a second group consisting of the strength of the focusing field, the amplitude of periodic beam deflection in a direction parallel or transverse to the path of the relative motion and the frequency of periodic beam deflection in a direction parallel or transverse to the relative motion.

Energy beam welding method

A method and an apparatus for the control of the filler material supply rate in energy beam welding as electron beam welding is disclosed. The width or cross-sectional area of a gap defined by opposed faces of two workpiece parts to be joined is measured by radiation, preferably X-ray radiation, and the rate with which filler material is supplied into a welding zone produced by the energy beam is controlled in proportion to the result of the measurement. The measurement may be made in advance of the welding zone and the control is then delayed by a period of time, which the welding zone takes to arrive at the position of the gap, where the measurement was made.

Method and apparatus for control of method parameters in energy beam

A deep penetration weld join is produced in an energy beam welding method where the energy beam, as for example, an electron beam, is directed into the join to produce a welding zone containing molten material, and moved along the join relative to the parts of the work. Additional material is introduced into the welding zone to fill a gap and/or to influence the metallurgical composition of the weld zone. By introducing the material into the melt at an acute angle to the beam axis and at a point spaced alongside the beam axis, the additive material penetrates deeply into the molten material. The additive material may be preheated prior to its introduction to the welding zone.

Method and apparatus for energy beam welding with filling material

In an energy beam welding method, as an electron beam welding method, wherein an elongated body or wire of filler material is introduced in a welding zone produced by the beam and comprising fused material, the filler material body is used to act on the fused material to prevent it from flowing out of the welding zone, which would cause voids and other defects of the seam produced. The method is particularly useful in welding thick workpieces as sheet metal plates with thicknesses of one to two inches and more.

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Germering, Germany

Johannes Koy