Page 26 - Gear Technology Solutions

Case 3 – Tooth Thickness at Pitch Point
In this case the switches for the normal chordal tooth thickness in the flank
generation input screen are turned on as indicated with the red arrows in
Figure 11. Case 3 also requires leaving the “Coordinate in Axial Direction” and
the “Coordinate in Radial Direction” equal zero in order for the program to
know that the calculation target is the tooth thickness at the pitch point.

After this, “Run Flank Generation” has to be clicked in order to generate the
appropriate CMM download file.

Figure 11: Flank Generation input screen, normal chordal tooth thickness
turned on

In case 3, the CMM grid has an equal distribution of columns and rows except
for the measurement point of the tooth thickness (see Figure 12). The angular
tooth thickness between the two distorted grid points is converted by the new
applet in the Dimension-Sheet program in a normal chordal tooth thickness. If
the Dimension-Sheet calculation is activated after the switches in Figure 11
are set to “On” and the flank generation was conducted, then the dimension
sheet output will show in part 6 in Figure 13 the normal chordal tooth
thickness, the axial distance of the tooth thickness points from the crossing
point of the respective member and the chordal addendum, In case 3 the tooth
addendum and the face width position reflect the correct pitch point location.

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