Abstract: The existing bag hanging mechanism is difficult to adapt to the high-speed production line packaging demand due to the lack of synchronization performance.A high-speed bag hanging mechanism that could realize efficient long distance synchronization bag hanging processes was proposed. Firstly,the bag hanging action was analyzed,and a high-speed bag hanging mechanism based on the cam linkage composite mechanism was designed. Subsequently,a kinematic model of the mechanism was constructed,and the key factors affecting its synchronization as well as the fixed cam parameter model required to realize the bag hanging trajectory were obtained. On this basis,the synchronization of the vacuum upper and lower suction blocks was established as the optimization objective. Combining with specific production examples,using the MATLAB optimization toolbox for high-speed bag hanging mechanism parameter optimization design,the best mechanism parameters and convex contour line were determined. Subsequently,the use of ADAMS simulation was employed to obtain the motion curve and comparison and analysis with the theoretical results calculated by MATLAB were constructed to verify the optimization design and the accuracy of the kinematics model. Finally,the actual bag-hanging test further verified the significant advantages of the designed high-speed bag hanging mechanism in improving the efficiency and qualification rate of the packaging of sanitary products,which providing effective technical support for the high-speed production line.

Key words: sanitary product packaging machine, bag hanging mechanism, mathematical model, parameter optimization, high-speed bag hanging test