Kuka Systems Gmbh

Walter Hundhausen Gmbh & Co. Kg

Kuka Schweissanlangen+roboter Gmbh

Manfred Menzinger

Otmar Fischer

Klaus Schneider

Harald Meyer

Thomas Hauck

Heinrich Gruenauer

Wolfgang Farrenkopf

Frank Rudolph

Reinhard Opitz

Joachim Von Hirsch

A pressure welding method is provided and a pressure welding machine () is provided with a frame (), two welding heads (), mobile along a feed axis (), and two adjusting units (). The adjusting units () include feed drives () for the welding heads (). The two adjusting units () are mounted so as to be axially movable () on the frame () and are interlinked with an adjusting drive () by means of a common adjusting element () and supported in a closed system of forces while receiving the pressure welding forces, thereby relieving the frame (). The common adjusting element () is configured as a continuous spindle () having two self-locking threads () that run in opposite directions.

Pressure welding machine and pressure welding method

An improved friction-welding process for effecting a joint between steel and nodular graphite-containing cast iron by using (i) a short friction-generating time so as to minimize diffusion of carbon into steel and (ii) an elevated forging pressure so as to effect a quantitative ejection of carburized melt but avoid formation of a weld laminate, is provided, as well as a nodular graphite-containing cast iron of grade 40.3 S, suitable for use in friction-welding and comprising about 280-320 graphite nodules per mm.sup.2, 280-300 ferrite grains per mm.sup.2 and a spherulite proportion of about at least 95% by weight of the graphite precipitations.

Process for welding cast iron

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Kissing, Germany

Manfred Menzinger