Design of the cylindrical cam transfer system and modal analysis of the cam

Abstract The cylindrical cam conveying system is widely used in automated equipment due to its high motion accuracy. However, traditional designs are prone to instability caused by vibration at high rotational speeds, and the complex contours drive up the manufacturing cost. This paper proposes an innovative design scheme for a cylindrical cam linear conveying system based on the modified sine motion law. By segmentally combining sine and cosine functions, the motion curve of the follower is optimized, significantly reducing the maximum jerk and jump, and improving the dynamic impact characteristics. Combining mathematical modeling with Creo parametric design, the envelope equation of the cam contour is derived, and a three-dimensional model is constructed to achieve rapid and low-cost development. The modal analysis based on Ansys shows that the first six-order natural frequencies (288.27∼1877.9 Hz) of the cylindrical cam are much higher than the working frequency (12 Hz), verifying the structural stability under high-speed operating conditions. Experimental comparisons show that the modified sine law reduces the displacement error by 58.3%, the vibration acceleration by 37.8%, and the peak jerk value by 42.9%. The research proves that this scheme significantly reduces the cost while improving motion accuracy, providing theoretical and practical support for the engineering application of cylindrical cam systems with high dynamic performance.