This refers to an interference occurring at the addendum of the external gear and Where α a2 is the pressure angle seen at a tip of the internal gear tooth.Įquation (5-3) is true only if the outside diameter of the internal gear is bigger than the base circle:įor a standard internal gear, where α = 20°, Equation (5-5) is valid only if the number of Involute interference can be avoided by the conditions cited below: It is prevalent when the number of teeth of the external gear is small. This occurs between the dedendum of the external gear and the addendum of the internal gear. Three different types of interference can occur with internal gears: In order to get a correct tooth profile, the coefficient of cutter should be taken into consideration. That is because the cutter has a coefficient of shifted profile. Of tooth depth and root diameter, after cutting, will be slightly different from the calculation. Pinion cutters are often used in cutting internal gears and external gears. If the center distance, a x, is given, x 1 and x 2 would be obtained from the inverse calculationįrom item 4 to item 8 of Table 5-1. It will become a standard gear calculation if x 1 = x 2 = 0. Table 5-2 Table 5-1 shows the calculation steps.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |