| Packing machine is an indispensable critical equipment in the field of industrial packaging,widely used in the packaging of beverages,tobacco,food and pharmacy,electronic products,etc.But,due to the restriction of the erecting process of cartoning machine and high difficulty of the case erecting cam curve design and solving,which lead to the difficulty break through the capacity threshold of 150 cases per minute,Which become an urgent technical problem to be solved in the back-end packaging industry.Therefore,this dissertation takes the Case Erecting Mechanism(CEM)of the packing machine as the research object,the cam-type CEM is designed and developed to realize the high-speed and smooth operation of the case erecting machine above the throttle of production capacity,the main research content are as follows:Firstly,the case erecting process is analyzed,and the whole case erecting cycle is divided into four sections: taking,turning,delivery and transition,and the mathematical models of each station segment is established based on different working conditions in the delivery station section,four schemes of circular arc delivery,linear delivery,extrapolation delivery and internalization delivery are designed to increase the application range of the CEM.The causes of interference overlapping of suckers in circular arc transmission scheme is studied and the solution is proposed.Secondly,the sine function is introduced into the construction of the transition section displacement curve,aiming at the minimum valley peak drop of slope curve and second derivative curve,the key node parameters of the cam is optimized to improve its motion performance.In order to improve the design efficiency of this type of cam,the design and optimization process of the cam is programmed.Thirdly,based on ADAMS software,the motion simulation is carried out for the cases taking station,delivery station and CEM of the packing machine.The deviation between the key motion parameters of the simulated angular displacement,angular velocity,angular acceleration and angular jump and the theory are analyzed to verify the accuracy of the theoretical model of the cam style high-speed CEM.Finally,the manufacturing process of the cam is studied,and the function verification experiment is carried out.The error analysis of the rotation angular velocity is carried out,and the function and efficiency of the cam have reached the set goal,so that the correctness of the theoretical model of CEM is verified.The dissertation is based on the systematic research on the process,mathematical modeling,optimization,simulation and experiment of the case erecting mechanism of the high-speed packing machine,the production capacity threshold can be broken through,and the research and development ideas and theoretical references of the same type of cam case erecting mechanism can be provided. |
