Research On Nut Forging Automatic Production Line And Position Control Algorithm Of Forging Station Transfer

To approach the practical application needs in the field of mechanical automatic manufacturing,this thesis proposes a variable universe fuzzy PID position control algorithm,which is deployed to the controller design of position control system of forging press station transfer moving platform in the nut automatic forging production line.We develop the equivalent mathematical model for the position control of the mobile and leverage variable universe fuzzy PID algorithm to build the position control system model of the moving platform via MATLAB & Simulink,which is verified by simulation analysis.The results show that the variable universe fuzzy PID control system has excellent dynamic and static performance,higher response speed,and better advantages in allowing adjustment on time and accuracy.This thesis mainly investigates the following aspects.First,according to the forging process,processing characteristics,and enterprise production requirements,we design the overall scheme of nut hot forging automatic production line.The overall scheme includes a single-machine multi-station hot forging machine and its automatic feeding and blanking device,metal-bar automatic processing machine,which can complete the automatic production of nut from metal bar unbundling,cutting and blanking,heating,forging and forming processes.The nut hot forging automatic production line adopts modular design,which has the characteristics of high efficiency and flexibility.According to the overall scheme,we complete the overall design of the automatic conveying device of the single-machine multi-station forging.In addition,the station-transfer moving platform is designed and modeled by the software of Solidworks.Then,according to the composition characteristics of the position control link of the station-transfer mobile worktable,we leverage the control principle of three closed-loop feedback and develop the equivalent mathematical models of the position control system and the screw drive system.Meanwhile,by simplifying and calculating the model of the entire moving platform position control,we derive the transfer function of the entire moving platform system.Finally,according to the requirements and control characteristics of the station-transfer moving platform control system,we propose a mobile worktable position control algorithm based on variable universe fuzzy PID.Building upon the fuzzy PID control,we add a variable universe module to adjust the universe of fuzzy control with the change of system conditions,which finally set the PID parameters that meet the requirements of system control.Through MATLAB / Simulink software,we build the position control system model of the moving platform based on variable universe fuzzy PID algorithm and verify the model by simulation.The simulation results show that by incorporating the variable universe fuzzy PID control algorithm into the position control system,we are able to improve the response speed of the system,reduce the steady-state adjustment time of the system,and decrease the steady-state error of the system,leading to better system control performance.The proposed approach is applicable to complex nonlinear coupling control systems.This thesis innovatively proposes the control system of nut forging automatic station transfer moving platform synergizing the strength of the variable universe fuzzy PID position control algorithm,which contributes to this area with both theoretical insights and practical engineering application value.