The geometry of a spur gear tooth is synthesized by mechanism motion. A blank gear is engaged in motion with a rack, so that a rack tooth “cuts its way” into the gear, thus generating the tooth profile. The resulting gear teeth are perfectly interdigitated with the teeth of the rack. Then, the gear is also engaged with a spur gear that was made with involute curves (same specs). The gears are also perfectly interdigitated, showing that the synthesized gear has the proper teeth profile (also involute). The design is driven parametrically (Metric gear: Module, Pressure Angle, Addendum/Dedendum coefficients, number of teeth), so that the methods can be used to generate any spur gear. Moreover, the methods of geometry synthesis based on mechanism motion are widely applicable to other designs.
How to design a standard spur gear (Creo Parametric)
The geometry of a spur gear tooth is synthesized by mechanism motion. A blank gear is engaged in motion with a rack, so that a rack tooth “cuts its way” into the gear, thus generating the tooth profile. The resulting gear teeth are perfectly interdigitated with the teeth of the rack. Then, the gear is also engaged with a spur gear that was made with involute curves (same specs). The gears are also perfectly interdigitated, showing that the synthesized gear has the proper teeth profile (also involute). The design is driven parametrically (Metric gear: Module, Pressure Angle, Addendum/Dedendum coefficients, number of teeth), so that the methods can be used to generate any spur gear. Moreover, the methods of geometry synthesis based on mechanism motion are widely applicable to other designs.
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