Structural Analysis And Optimal Design Of Cross Cardboard Molding Machine

With the problem of environmental pollution becoming more and more prominent and the awareness of environmental protection increasing,corrugated paper packaging has become the main means of green packaging.At present,research on carton forming machinery is becoming more and more mature,but the research of cardboard molding machine is still in the initial stage of development.With the continuous improvement of partition protection and aesthetic requirements,cardboard molding machinery has become the research focus of enterprises.On the basis of the cardboard molding machine designed by YASKAWA SHOUGNAG robot Co Ltd for the milk packaging line of Mengniu’s milk packaging production line,this paper optimizes the design of the mechanism with virtual prototype technology and finite element analysis method for the problems of low service life and failure of parts and improves the service life of the mechanism.Specific research contents are as follows:1.Research on the mechanism optimization analysis scheme.In view of the structural characteristics of the cardboard molding machine,the malfunction analysis of the cardboard molding machine is carried out to improve the service life of the cardboard molding machine,and the optimization analysis scheme is set up;2.Research on the the clearance model of the cardboard molding machine.Aiming at the fracture failure of board forming machine parts,the method of engineering site restoration is applied to abstract the analysis model.Based on Hertz contact theory,a clearance kinematic pair model for cardboard forming machine is established.Through kinematics and dynamics analysis of the mechanism,the force and motion parameters of the key components are obtained,the effect of clearance on the motion of the mechanism is verified;3.Research on the fatigue life prediction method of cardboard molding machine.By means of finite element analysis,combined with the results of kinematics and dynamics analysis,the weak link of the mechanism is determined by static analysis.Through the fatigue life prediction of the mechanism,the results of comparison and the actual service life of the mechanism are compared,and the reliability of the simulation analysis are verified;4.Research on optimization and improvement of mechanism.This paper optimizes the key problems of the mechanism,ameliorates the accuracy of transmission constraints block octopus and raise the efficiency of rod mechanism.The virtual prototype and finite element analysis model are established,the mechanism is simulated and analyzed in combination with the clearance model of the cardboard molding machine and the fatigue life prediction method,and the effect of the mechanism life improvement before and after the optimization is compared.The light quantitative research on the octopus block is carried out with the study of optimization theory and optimization method.The direct optimization method for single objective optimization of octopus block is used to reduce the quality and achieve the goal of lightweight.The theory of modal analysis is studied,and the possibility of resonance is verified by modal analysis.Physical prototype is manufactured,and the rationality of the optimized design is verified through the molding experiment.The research in this paper lays the foundation for the promotion of cardboard molding machine.