| The intermittent transmission chain, as a critical part for performing the function of intermission, is an actuator widely used in Die-Cutting Machine. In practice, it is the dynamic performance of the intermittent transmission chain that determines the overall capacity and working accuracy of the Die-Cutting Machine since it always involves the characteristic of high-speed.In this paper, systematic study on the dynamic modeling of the intermittent transmission chain in Die-Cutting Machine is carried out. Firstly, the change characteristic of the speed and acceleration of the intermittent transmission chain under Polygon-Effect is analyzed. The computational method of the tension of the chain link, then, is derived. Also, several types of dynamic load are discussed in detail with more emphesis on the analysis of the phenomenon of the impact when the chain link meshed into the sprocket. Consequently, the form of vibration in the intermittent transmission chain is confirmed. Secondly, the physical model of the intermittent transmission chain is simplified in view of the analysis of its principle of operation. Then, its dynamic model, taking into account the rigidity and damping of the chain link, the input shaft and the preloading device, is established. In addition, the corresponding dynamic differential equations are derived using the Lagrange Method. Finally, Matlab tool is employed to solve the differential equations obtained above, based on which, the analysis of the dynamic performance of the system is presented as well. Specifically, the Runge-Kutta Method of Four Order is utilized to obtain the numerical solution, and the dynamic response of the system is tested under the different setup of the parameter of the system, which, in detail, involves the vibratory reponse of the chain, the driving sprocket wheel and the driven sprocket wheel as well as the tensile change during the intermittent motion which is first proposed in the paper. |
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