Papers by Author: Fang Wang

Abstract: In view of the complexity of the gear measurement center and its error calibration, the paper put forward the basic concept of a virtual gear measurement center, and analyzed the compositon of the virtual system. The virtual gear measurement center can be used to simulate the real gear measurement process and quantitatively analysis the effects of error, so as to calculate the measurement uncertainty. The application of the virtual gear measurement center was discussed.

Abstract: Synchronization torsion bar is a key part in independent and dependent impression mechanism which ensures synchronization motion at both ends of blanket cylinder. Due to frequent action of the mechanism in high-speed printing, synchronization torsion bar would cause huge impact torque so as to affect parallel shifting of blanket cylinder and uniformity of printing impression. Based on structure features and force of synchronization torsion bar, finite element model of synchronization torsion bar was established by adopting structural mechanics and finite element method, then static stiffness of synchronization torsion bar was solved by adopting principle of minimum potential energy. The result of computation shows that the maximum torsion deformation of torsion bar in X direction happens at the left connection point. Because the deformation is very small, the bar can meet the requirements that blanket cylinder.

Abstract: Each component of die-cutting machine at high speed may produce vibration and die-cutting quality would be affected in different degrees by direct or indirect vibration. Position accuracy of paper-conveying grippers may be an important influencing factor. Under some suitable hypothetical conditions, single degree of freedom no-damp dynamic model was established based on transferring principle of mass and stiffness equivalence and principle of equivalent substitution. Position process has been discussed at high speed, dynamic displacement deviationresponse spectrum has been gotten by numerical computation method in cam resting rang. The result of the analysis and computation shows that position error has an increasing tendency with the increase of the working speed. So it is vitally necessary that the maximum speed of die-cutting machine must be limited to meet die-cutting accuracy requirement when natural frequency of the machine is known.

Abstract: Ammunition fuse shell is carried rapidly by the carrying manipulator from heating furnace to molding machine, so manipulator need accurate repeated position. The servo position control system is established to meet manipulator multi-point and flexible location based on pneumatic driving system. Linear mathematical model of the servo position control system is built based proper assumption, and model was used to analyze control system theoretically. The carrying manipulator can satisfy demands including decided order and positions; the control character is good by debugging.

Abstract: Position stability analysis of gripper bars on die-cutting machine is one of the important factor which affects machining quality and production capacity. By introducing comprehensive influence parameter period ratio such as machine speed and mechanism natural frequency,mathematical model of gripper bars in stopping period has been established. The results indicate that dynamic motion error of gripper bars in stopping period show an increasing tendency so as to affect stable position with the increasing of period ratio. To ensure a stable position state in stopping period, finally two solutions are given out to satisfy high accuracy.

Abstract: Planet gear mechanism is designed according to the planet gear action during the course of screw cap after working principle of the cap screwing machine is briefly introduced. The course of screw cap can be simulated by the dynamics simulation software ADAMS. The relation between rotational speed and the gearing-in force can be obtained. This provides the theoretical foundation for the improvement of seal quality in cap screwing machine.

Abstract: To improve the efficiency of PET bottle automatic capping machine and obtain a better usability for meeting the requirement of industrialization, a kind of cap sorter mechanism of Cap Screwing machine has been designed. The structure, working principle and working process of the mechanism was analyzed. The virtual model machine of cap sorter mechanism was established with the help of ADAMS software. The dynamic simulation and analysis of cap movement in cap sorter mechanism has been done, and optimization analysis of the factors which affected performance of the mechanism was also done. The optimization result was obtained through analysis of cap surface wear by using ANSYS software, which can provide theoretic foundation for the improvement and optimization of cap screwing machine.