With the goal of ensuring optimum tooth flank contact, the teeth of gear pairs can undergo flank corrections based on three different approaches according to ISO 21771-1, i.e. flank line crowning, flank line slope modification and flank line end relief. By selecting on ‘Tooth flank modifications’ at the page ‘Gear connections’, the corresponding geometrical data in relation with these approaches can be defined. For each gear it is possible to have either symmetric or unsymmetrical modifications by setting or clearing the available flags respectively at the bottom. By activation of an unsymmetrical flank modification, the corresponding data column is added in the window.
All in all, the user can make use of the line load and gap width graphics as guidance to establish a flank correction proposal. If, for instance, we start from a gear tooth mesh condition like this:
0
And we apply a combination of flank line crowning and flank line slope modification, it significantly helps to have an homogenous line load as shown in the following pictures:
