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Modeling and Geometric Characteristics of a Circular-Arc-Profile and Circular-Arc-Tooth-Trace Cylindrical Gear Generated by Complementary Circular-Arc Cutters
To improve the limited flexibility in tooth-surface geometry control of circular-arc-tooth-trace cylindrical gears, a circular-arc-profile and circular-arc-tooth-trace cylindrical gear (C2CATT) generated by a pair of complementary, locally conjugate circular-arc cutters is proposed. Based on the machining principle of a dual-edge rotary cutter head, the cutter swept-surface equations, cutter-workpiece meshing equation, and parametric tooth-surface models are established. The effects of the main parameters on the middle-section tooth profile and tooth-trace geometric offset are then investigated. The results show that the tooth-trace geometric offset is symmetric about the mid-facewidth section, and its amplitude gradually decreases from the middle toward both ends. When the number of teeth increases from 31 to 67, the maximum offset amplitude decreases by 52.7%; when the module increases from 2 mm to 5 mm, it increases by 20.0%. Increasing the cutter-head radius effectively reduces the maximum offset amplitude. The pressure angle mainly affects the addendum, dedendum, and working tooth profile, whereas the cutter profile arc radius and root fillet coefficient primarily affect the local transition regions. The proposed model and the obtained parameter relationships provide a theoretical basis for tooth-surface design and cutter parameter selection of C2CATT gears.
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Supporting Agencies
- Funding: This work was supported by the Sichuan Science and Technology Program (Project No. 2023ZYD0139), the Natural Science Foundation of Sichuan Province (Project No. 2022NSFSC0454, 2022NSFSC1975).


