Deviation analysis

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Deviation analysis for cylindrical gears

KLINGELNBERG Precision Measuring Centers

Tooth flank waviness and its causes

Low noise levels in the interior are an important quality criterion for passenger cars. As engines become increasingly quiet, and in particular as the use of electric drives becomes more widespread, noise caused by transmissions is now the subject of greater focus. Today, evaluation methods are available that make it possible to analyze tooth flank waviness reliably and reproducibly and to compare it against tolerance specifications. If noise-causing waves can be identified on the gear surface, the next step is to identify the causes giving rise to such waviness so that it can be eliminated.

Organized search for causes

  • Graphical analysis of deviation curves by comparing measurements
  • Joint evaluation of all teeth – Waviness over the rotation angle
  • Practical methods for waviness analysis
  • Cause analysis: Workpiece, tool, machine, process 
  • Topographical false color diagrams and plotting of the waviness helix angle
  • Simulation of hobbing and generation grinding: errors caused by wobble/axial feed interaction among others
  • Topographical representation of the effect of axial feed on surface structure