Double Flank Roll Testing

Once the double flank roll test is carried out, a sinusoidal graphic is obtained including a low frequency component due to the runout and a high frequency component representing the quality of the gear [6]. In order to have these values in a separate way, the data obtained in the test are decomposed by means of the Fourier transform defining in this way the runout effect and tooth profile generation respectively. 

Double flank roll testing as verification technique for micro gears... 

A broad range of verification techniques for gears are currently available in the market but not so many seem to be valid or extrapolated for a micro range (Figure 1). Thus a thorough analysis of these techniques and a definition of a double flank rolling test for micro gears were accomplished in this paper. 

Double flank roll test (working principle)... 

Fig. 2. Double flank roll test principles. Source Frenco GmbH...

Double flank rolling deviation Fi . Fi is the difference between the maximum and minimum values of the working centre distance, a , which occurs during a radial (double flank) composite test. 

Test equipment. Three double flank roll testers located in three different laboratories are used in the tests explained in this paper. 

The first target of this paper was obtaining reliable testing results out of a different range of double flank roll testers for worm and worm gear and this aim was clearly achieved. In the near future a complete statistical analysis of the tester range will be accomplished. 

Fig. 4. Double flank roll tester 2D model for micro gear testing...

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