The Design And Optimization Of A Mechanism With Trajectory And Special Gesture Requirements For Ultra-high Speed Packing Machine

In the process of product packing, the packing mechanisms are required tocomplete some complex trajectories and special gestures according to the complexrequirements of packing. Generally, Many traditional basic mechanisms and combinedmechanisms can only complete some trajectory requirements because of the limitationof their structural characteristics, as to some special gesture requirements, it is oftenvery difficult to realize and thus affect the quality of the product packing. With thespeed of product packing become ultra-high, the packing requirements also increase.It not only requires the packing mechanisms to achieve the complex trajectories andspecial gestures but also requires the packing mechanisms having good performance.Firstly, a design method was proposed to realize the complex trajectory andspecial gesture requirements for the ultra-high packing mechanisms. The method isbased on the theory of superposition and combination of mechanisms and can realizethe trajectory and special gesture requirements of the ultra-high packing mechanisms.To begin with, it needs to design the trajectory and gesture of the mechanismsaccording to the trajectory and special gesture requirements of the packingmechanisms. Secondly, select the proper mechanisms of the based mechanism andattached mechanism, then conduct the kinematic analysis, the design and verificationof the mechanism. Finally, an engineering example is given to realize this method indetail. the mechanism designed with this method can realize complex trajectories andsome special gestures.Secondly, an optimization method based on micro-genetic algorithm wasproposed for the kinematic performance requirements of the ultra-high-speed packingmachine. The method used the kinematic performance as the optimal goal anddetermined the design variables according to kinematic analysis and impact factoranalysis. As to the constraints, this optimization method considered the trajectoryrequirements, gesture requirements and the kinematic requirements of the basicmechanisms as well. Then an optimization model was established with the optimalgoal, the design variables and the constraints. In order to get a good result, thisoptimization method adopted the micro genetic algorithm to solve the optimizationmodel above. As an engineering example, an aluminum foil folding and pushing handfor cigarette of an ultra-high speed machine was optimized. The result shows the efficiency of this method.Finally, the above mechanism design methods and optimization methods wereapplied to the new ultra high-speed packing machine and designed an ultra high-speedaluminum foil folding and pushing hand for cigarette. The results show that the ultrahigh-speed aluminum foil folding and pushing hand for cigarette not only can realizethe complex trajectory and special gesture requirements but also has good kinematicperformance. The new ultra high-speed aluminum foil folding and pushing hand forcigarette can reduce the damage of the cigarette and improve the packing quality ofaluminum foil cigarette.