Study On Processing Device Used In Nutation Drive Cone Cycloid Teeth Cutting

Nutation drive cone cycloid gear is the vital important of nutation driving reducer. Radial dimension could be narrowed if cone cycloid gear could be used in the reducer. Technique of gear cutting and manufacturing was not perfect though the study of nutation theory, a lot of things were left to do in this aspect. The processing device used in cone cycloid teeth cutting was studied on the base of studying the theory of nutation engagement.Form of cone cycloid gear was described by spatial movement. First of all, nutation principle was studied; spatial mechanism model was established. Formula of gear form and the engaging characters were attained by coordinate conversion and formula derivation.Gear processing device based on enveloping method was proposed to cut cone cycloid gear, according to nutation drive style of cone cycloid gear. Special processing device which could handle both rough and machining and fine machining to cone cycloid gear could be reassembled by hobbing machine.Further reassemble to the processing device was proposed on base of the founded model. Processing device, both rough machining and fine machining could be handled to cone cycloid gear, could be reassembled by the upright column, body and rotary work-table of hobbing machine.Simplified method that meets the demand of kinematics was proposed to realize the movement constrain after analyzing.Processing device was designed based on the parameters of the 2K-H type reducer, the number of planet gear Z₂ = 15, number of the center wheel, the nutation angleθ= 2.317°and cone rolling angleβ= 3.217°.Milling force, milling velocity and milling power were studied; grinding power and grinding velocity were also analyzed according to this processing device.The force and the forming lever were analyzed by utilizing the Finite Element Analysis Method and the software of ANSYS, and the adjustment to the cutting tool was made according to the analysis effect. Form of cone cycloid gear was preliminary studied. Enveloping line equation was gotten through deduction and equation of cone cycloid gear form on normal section.Influence on gear form of each parameter was discussed.