Producing Profile and Lead Modifications in Threaded Wheel and Profile Grinding

摘要

The main reasons for gear modification are to compensate for the deformation of the teeth due to load and to ensure a proper meshing to achieve an optimized tooth contact pattern (Fig. 1). Figure 2 shows typical flank modifications that may be subdivided into profile and flank modifications (Ref. 1). Both modification types are defined separately but can be superimposed. The most common modifications-profile and lead crowning-are utilized in order to achieve a good contact pattern without having contact on both ends of the flank at either the tip or root area. Other designs are tip and root relief, and end relief. Profile or lead angle modifications are used to compensate for deformation of the teeth themselves, but also for shaft deformation within the gearbox resulting in non-parallel axes. All of these modifications can be combined and thus result in complex flank modifications (Refs. 2-3).