Analyse And Research Of Die-Cutting Machine's Paper Feeding And Positioning System

The periodic motion mechanism and positioning mechanism, whose performance could impact directly on the Die-cutting machine's works, are two of the most important components in that machine. The paper is proceeded with a fund project of Beijing Municipal Education Commission named"The Research of Die-cutting Machine's Stability and Reliability". The motional theories were used in the research of the periodic motion mechanism; the model of periodic motion machine was established using Newton's theory and the motional principle of the mechanism was optimized. The positioning mechanisms were redesigned after analysis of them using optimization design was done, and the result was good. The results were summarized as follows:1. The profiles of the periodic motion mechanism was analyzed, and the profiles of parallel indexing cam with different parameters and motional principles were got as well as the data; the conditions that impacted the profiles were realized and analyzed;2. A model that described the torsion stiffness of the input and the output shafts, these were two most important factors, was established; the equations describing the model were got as well as the resulting curves after computing them;3. The resulting curves describing acceleration of parallel indexing cams with different motional principles and different parameters were got; the analyses and comparisons of principles'and parameters'impacts on the resulting were done;4. The motional principle of the parallel indexing cam in a Die-cutting machine were optimized; ten times'points of a special principle were variables, and vibrations of the resulting curve of ceasing period were the targets, and the connection of variables and other performances were conditions. The optimized curve slowed down the vibration;5. The first positioning original motion curves were got after the cam was computed. The academic collision speed that was too high for precise positioning was lower afternew motional principle was used;6. The second positioning original cam was made up of three arcs that made positioning error in high speed increased. The academic condition was improved after cam's surface's using new motional principle.