Surface modification and tooth contact analysis of variable hyperbolic circular-arc-tooth-trace cylindrical gears

Abstract. To improve the bearing capacity and provide mathematical model basis for vibration noise reduction of variable hyperbolic circular-arc-tooth-trace (VH-CATT) cylindrical gear, tooth surface modification design method based on parabolic forming blade cutter inclination was proposed. The geometric inclined completed. modified equation deduced, influence parameters curvature characteristics analysed further. contact analysis (TCA) established, elliptical area analysed. Research shows that coefficient a vertex position u0 have effects main concave–convex surface, both profile line direction, but angle only has is larger. γ, parabola a, certain influences area. γ most important parameter to capacity, excessive will cause bridge contact, value range can be determined radius. research results technical improving VH-CATT gear optimising design.