Mag Ias Gmbh

Leo Schreiber

Matthias Weber

Jürgen Reingen

Wolfgang Hafner

Maarten Brussee

Andreas Grützmacher

Emanuel Gross

Hans Kuhn

Emanuel Groβ

For friction reduction in sliding bearing, it is known to structure the sliding surface () by ECM by introducing a plurality of microscopic small indentations (). According to the invention it is proposed in particular in the same process step to smoothen also the intermediary spaces () between the indentations (), thus to remove the tips of the surface profile.

Sliding surface

In order to reduce friction of a crank shaft during operation by a large amount with low complexity through structuring sliding bearing surfaces () of the crank shaft through controlled introduction of microscopically small indentations () it is proposed for the center bearings and the crank bearings to only structure highly loaded portions of the bearing surface in circumferential direction and also in axial direction since this is already difficult to achieve in view of the operating gap towards the tool that only has a size of a few &#x3bc;m.

Structuring of sliding surface portions

In order to be able to measure a diameter in a turning machine without rotating a workpiece and thus prevent circularity and concentricity errors from entering into the diameter determination, it is proposed according to the invention to use a measuring device that is movable in both transversal directions relative to the rotation axis, thus in the X-direction and also in the Y-direction, wherein the measuring device can scan the workpiece from both sides in one clamping step without rotating the workpiece.

Diameter measurement in turning machines

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Schwäbisch Gmünd, Germany

Leo Schreiber