Research On Motion Analysis And Hydraulic Control Of Twin Roller Spinning Machine

Spinning technology,as a common processing method for rotary parts,has unique advantages in the form of workpieces with curved surfaces.It has been widely used in the production of aerospace,automobiles,home appliances and various civilian products.On this basis,a wide range of spinning equipment is also widely used in the production of various industries.In this paper,a spinning device for curved surface forming is studied.The device adopts a spinning method with a double-roller clamping without a core mold,and uses hydraulic pressure as a driving method for precise motion control.The main research contents are as follows:(1)The motion control of the spinning machine is analyzed.The limitation of the two-variable interpolation method when the CNC system is used to machine the curved surface by the double-roller clamping method is discussed.The rotation angle variable θ is introduced and the three-variable interpolation is proposed.The method and the implementation method,and the running track of the rotating wheel is determined according to the contour of the surface.(2)A comprehensive introduction to the structural design of each part of the spinning equipment,the focus is on the detailed description of the structural design of the rotating wheel mechanism.The finite element analysis software was used to analyze the static performance of the main force components of the rotary wheel mechanism to ensure that the structural strength meets the design requirements.(3)The design and modeling of the hydraulic system of the spinning equipment was completed.According to the system load and working conditions,the design and component selection of the hydraulic system are carried out.The mathematical model of the four-side sliding valve controlled symmetric hydraulic cylinder is established for the electro-hydraulic proportional position control system of the zipper cylinder.By calculating the parameters of the transfer function,the system simulation block diagram is established by using MATLAB/Simulink,and the system Bode diagram,step response curve and sinusoidal response curve are obtained.The PID controller and fuzzy PID controller are added to the system to improve the control precision..(4)Experiment verification for the design and simulation of the previous topic.Observe whether the parts obtained by the spinning process according to the design and manufacture of the spinning equipment meet the processing requirements,and verify whether the electro-hydraulic proportional position control simulation result and the PID control method are accurate by experiments.According to the research results,the movement condition of the double-roller clamping spinning machine meets the design requirements,the structural strength of the equipment meets the requirements of use,and the control precision of the hydraulic position control system of the zipper cylinder is within the required range.Based on the engineering practice project,this paper conducts a deeper theoretical research,which not only serves the engineering practice but also has the corresponding theoretical guidance,and has certain research significance.