Automatic Loading And Unloading Of Large Closed Press System Design And Optimization

In recent years,with the continuous development of advanced manufacturing technology,stamping forming technology and information technology,modern control technology,information technology and other integration,mutual penetration,has been unprecedented development.In large and medium-sized enterprises,the traditional production mode has been gradually replaced by automatic punching line or multi-station press.For cost and safety reasons,small enterprises adopt single-machine automation to improve their competitiveness.Based on the YT28-1030 press of Shandong Gaomi High Forging Machinery Co.,Ltd.,this paper takes the self-developed automatic feeding and unloading system as the research object,aiming at the problems of slow production rhythm and unstable structure in the actual production process,carries out the optimization design.This paper mainly completes the following work:Firstly,according to the production situation of the enterprise and the control characteristics of YT28-1030 press,the design requirements of automatic feeding and unloading are put forward,different driving modes,transmission modes and control modes are analyzed,and the overall structure scheme of the manipulator is designed by means of servo drive,gear-rack drive and synchronous belt drive combined with the actual requirements.Secondly,the finite element analysis model of the manipulator is established.According to the application,the static analysis of the truss,Y1-axis manipulator and Y2-axis manipulator is carried out by ANSYS Workbench to verify the structural strength;the modal analysis of the whole manipulator and Y-axis manipulator is carried out to obtain the deformation under the solid-state frequency and the parts that need to be optimized,and to verify that the excitation frequency generated by the motor will not affect the mechanical strength.The hand system has an impact.Thirdly,ADAMS software establishes the dynamics model of the manipulator,obtains the velocity and acceleration curves of each axis,and obtains the end position curve,which is the theoretical basis for the optimization of the control sequence and the rhythm of the system;carries on the meshing force simulation analysis to the gear rack of the manipulator,and draws the conclusion that the equipment has impact vibration at the start-stop and speed nodes,but does not affect the normal of the equipment.Function.The vibration model of the system is established,and the position of the end of the Y2 axis manipulator is taken as the analysis point.The vibration frequency response model before and after optimization is obtained.After comparison,the vibration amplitude of the optimized system is obviously reduced.Fourthly,the control system of the manipulator is designed.PLC is chosen as the controller to complete the hardware selection and I/O point assignment of the control system.The pneumatic system of the end pickup is designed.The action flow chart and control sequence function chart of the manipulator are compiled,and the man-machine interaction interface is designed.Finally,through comprehensive analysis,the mechanical structure of the manipulator is further optimized and improved,and the production rhythm is optimized to 17.5second.Through practical verification,it can meet the production needs.