Gear skiving theory was developed many years ago. Presently, it has become more realistic with the optimization of new rigid and precise CNC machines that can synchronize the movements with high accuracy.
Do not confuse power skiving and gear shaping (same tool geometry) or hard hobbing (also called skiving). Power skiving is a very fast process to generate gear teeth and combines principles of turning, hobbing, shaping and shaving. There is a cross axis angle between helix angle of the part and helix angle of the tool, as in shaving cutters. This principle helps obtain a very low surface roughness with a high quality finish up to DIN 5 class.
|Applications and components||Cylindrical spur/helical gear cutting of toothed transmissions; internal/external gear/spline cutting; large series manufacturing in multitask machines|
|Modules (DP)||Normal module from 0.4 to 8 (Diametral Pitch from DP64 to DP3.125)|
|Obtainable profiles||Involute, straight flank and other special splines; chain wheel, timing belt pulley and other toothed transmissions; splines with missing and/or full teeth; other toothed profiles|
|Profile modifications||Semitopping, topping, full radio, protuberance; involute modifications (tip rilief, crowing, K profile, etc.); *see table for hob cutters|
|Geometries||Disc, hub and shank type solid cutters; taper/cylindrical (rilief by tool/machine axis)|
|Materials||Powder Metal High Speed Steels (PM HSS), solid carbide|
|Coatings||All common PVD coatings: Alcrona ® and Altensa ®|
|Clamping||Bores and shanks like shaper cutters; for specific tooling, please ask|
Fhusa-TSA has more than 40 years of experience designing and manufacturing shaper cutters and shaving cutters, and this experience was useful to develop high quality power skiving tools. Performing gear cutting in a multi-task CNC machine, in an automatic sequence together with other operations, is not the only advantage of power skiving.
|Cycle time||Up to 6 times faster than shaping|
|Gear quality||1 class better than shaping (DIN class 5 to 7)|
|Surface roughness||Lower than hobbing, similar to shaving|
|Lead modification||Via machine axis (not possible by broaching)|
|Undercut groove||Not necessary (always necessary for shaping)|
After-sales service for Power Skiving
Sharpening and coating of power skiving tools are key factors. TSA developed a special treatment of the cutting edge. FHUSA-TSA works with specific partners in Europe, USA and China to ensure our customers the excellent performance of its gear cutting tools throughout all its life.