Dynamic Analysis Of Cylindrical Indexing Cam Mechanism Based On Regid-Flexible Model

Spatial indexing cam mechanism has functions of translating guiding and controlling which is a kind of high speed and high precision intermittent motion mechanism. Spatial indexing cam mechanism is widely used in automatic machinery such as packaging field, printing field, lighting field, and so on. Contrast to the traditional intermittent motion mechanism, Spatial indexing cam mechanism has many advantages, such as compact configuration, high rigidity, high indexing precision, high input rotating speed and no restriction on follower motion laws.Spatial indexing cam mechanism contains globoidal indexing cam mechanism, cylindrical indexing cam mechanism and parallel indexing cam mechanism. The research of globoidal and parallel indexing cam mechanism has been maturity. The research of cylindrical indexing cam mechanism is advantaged in some countries, and is kept security from others. The studies mainly involve in surface equation of the cam, pressure angle, curvature, manufacture process, kinmatics analysis and so on in China. Based on the above analysis, this dissertation chooses cylindrical indexing cam mechanism as research object and the purpose of this dissertation is to improve the transmission accuracy and stability of the cylindrical indexing cam mechanism. The methods of this dissertation are the theory of spatial coordinate transformation, three-dimensional modeling method, modal analysis method and dynamic simulation analysis method. The content of this dissertation is to analyze the computer modeling method and dynamic characteristics of cylindrical indexing cam mechanism. The analysis can reduce the risk and loss in the peroid of physical prototype, shorten the design cycle and improve the design efficiency. The research results provide theoretical support for designing and assembling cylindrical indexing cam mechanism.In this dissertation, Pro/E can achieve3D solid modeling of the cylindrical indexing cam mechanism; the modal analysis of input and output shaft is finished in ANSYS; the virtual prototype model of cylindrical indexing cam mechanism virtual prototype is created and the simulation analysis of rigid-flexible multiply model is finished in ADAMS. This dissertation focuses on the following contents:First, the main structure parameters of the cylindrical indexing cam mechanism are analyzed in detail. Meanwhile, using two coordinate system to establish surface equation of cylindrical indexing cam mechanism based on the theory of spatial coordinate transformation.Second, building virtual prototype model of cylindrical indexing cam mechanism through the dynamics analysis software ADAMS and carry out its basic simulations. The contrast of the simulation data and the theoretical data shows correctness of the model.Third, the modal analysis of input-output shaft in cylindrical indexing cam mechanism is studied in ANSYS.Fourth, this dissertation studies the method of building rigid-flexible multiply model of cylindrical indexing cam mechanism, and researches its dynamic characteristics in different structure parameters and different work environment. This dissertation comprehensively analyzes the effect on the dynamic characteristics of cylindrical indexing cam mechanism in different conditions.