Design And Anaysis Of Elbow Actuator Of High-speed Precision Press

With the number of blanking or punching efficiency and the improvement of thequality requirements of blanking parts,small parts of the growing demand for precision,so the current development of high-speed precision punch is the trend.In this paper,the kinematical analysis and dynamic analysis of the elbow-joint actuator arecarried out on the structure optimization and dynamic performance of the high-speed press elbow-joint actuator,and according to the multi-body dynamics,the construction of the elbow joint actuator is carried out.Modular and Simulation.The main contents of this paper are as follows:(1)The displacement equation,velocity equation and acceleration equation of each bar and slider are established,and the kinematics analysis is carried out.By means of a group of examples,by means of Matlab And the elbow-type actuator mathematical model,a more in-depth analysis of the implementation of the agency's motion characteristics.In order to achieve the shortest objective of the crank rod,a hybrid algorithm combining the engineering genetic algorithm and the conjugate gradient method was used to optimize the rod length of the actuator and obtain the optimized rod length and verify the correctness of the optimization.(2)By the high-speed precision press elbow-type actuator split into several independent branch structure,the establishment of the bar and the slider displacement equation,the speed of the first mechanical system dynamics to do a detailed introduction,leads to mechanical system dynamics And the dynamic statics equations related to dynamic static analysis are introduced emphatically.Especially,how to establish the equations and solve the equations is discussed.The dynamic analysis of the joystick of the toggle actuator is carried out and the principle is established according to the D'Alembert principle.The dynamic equations are solved by using mathematic software Matlab,and the load curve of the rocker is obtained finally.The main contents and simulation flow of the multi-body dynamics analysis software Recurdyn are introduced,and then the elbow The three-dimensional model of the high-speed precision punch press as the transmission system is introduced into Recurdyn.The restraints and working load driving loads are added according to the assembly requirements.Then the post-processing of the results shows the change of the force on the key rod of the toggle actuator,Through the Matlab with the force curve is compared to verify our design is reasonable.The kinematic analysis is carried out.Through a series of examples,the motion characteristics of the actuator can be analyzed more deeply by using the mathematic model of Matlab and the elbow joint actuator.In order to achieve the shortest objective of the crank rod,a hybrid algorithm combining the engineering genetic algorithm and the conjugate gradient method was used to optimize the rod length of the actuator and obtain the optimized rod length and verify the correctness of the optimization.(3)According to the fixed interface modal synthesis method,the connecting rod and the supporting column are used as the flexible body,and the multi-body dynamics software RecurDyn is used to construct the rigid-flexible coupling dynamics model of the actuator.According to the theory of flexible multibody dynamics and the principle of clearance collision,the model of the high-speed precision-free punching machine with clearance and rigid-flexible coupling is obtained by comparing the two cases of no-load punching andpunching.Velocity,acceleration and body vibration,and compared with the dynamic characteristics of the punch in the ideal case,the influence of the flexibility and the clearance on the dynamic performance of the press was studied.