The Elasto-Dynamics Study On Dual-Elbow-Bar Mechanism Of The Platen Die-Cutting Machine

The platen die-cutting machine is one of important devices in printing industry . With the rapid development of modern society and the improvement of people's demands , high speed and high precision have become the most important trend of the platen die-cutting machine . The die-cutting mechanism is the core of the die-cutting machine , and its capability decide the work ability , the work speed and the qulity of the products . However , because of the traditional habit, people only analyzed the mechanism's movement characteristic and the static power , and the fact is more intricate . Therefore , we should study the work principle , the movement characteristic and the dynamics characteristic of the die-cutting mechanism .The major content is as follow:1. The kinematics analysis is the basic of the dynamics analysis, in this article, the mechanism transformation method and the searching algorithm are used to analyze the movement of the dual-elbow-bar, and we get the rule of movement of the double-elbow-bar in a period by using the MATLAB software .2. Based on the D'Alembert principle, the rigidity dynamics analysis of the dual -elbow-bar is disposed to get the value of the power in a period, on the assumption that the mechanism is rigid. And the contrast indicates that the value of the power will be increscent largely , in the case of considering the press, which will bring the negative effect.3. The elasto-statics analysis of the dual-elbow-bar is disposed to get the value of the stress and the distortion of every bar, in the case of considering the mechanism's elasticity . And the result indicates that the stress of the parts which belongs to the linkage and the elbow-bar mechanism is bigger than allowable stress when the press becomes 300t.4. The mode analysis on the dual-elbow-bar indicates that the natural frequency has no important relation to the final movement of the dual-elbow-bar mechanism, in the case of considering the mechanism's elasticity, and we can think of the mechanism as rigid .5. In the case of considering the mechanism's elasticity, the finite element method is used to analyze the transient dynamics by the ANSYS software .And the data shows that ,if the press is brought to bear, the middle part of the moving platform mechanism is changed easily, when thedual-elbow-bar is running.