Research On Multi-roller Rotary Forged Swing Head Structure And Forming Process

Based on the research of single-roll rotary forging and double-roll rotary forging,the multi-roll rotary forging technology is a new method for integrally forming plastic super-large diameter discs.This technology can integrally process a metal disc or a metal ring with a large diameter/thickness ratio(the diameter/thickness ratio of more than 100,a diameter of up to 10 m,and a thickness of up to 100 mm or less)to replace the traditional time-consuming and material-wasting Welding assembly.It can solve the problem of the manufacturing technology of the large-diameter metal disc and metal ring required for the overall head or end plate of large-scale containers such as nuclear power and chemical industry.With the advantages of improving material utilization rate,production efficiency and forming performance of super-large diameter disc,this method can meet the requirements of large nuclear power and high-pressure vessel safety level.In this paper,the working principle of multi-roll pendulum was analyzed,and the motion model of multi-roller pendulum process was established.The formula for calculating the forming force,torque and power of multi-roller was derived,and the multi-roll pendulum swing head was designed.Structure,explored the interaction mechanism between multiple cone rollers and blanks.Taking a multi-roll pendulum to form a steel disc with a diameter of 500 mm and a thickness of 5mm(hereinafter referred to as the workpiece)as the research object,and completes the research on the structure of the swing head and the lower mold of the multi-roller disc.The designed multi-cone roller oscillating head and lower die motion principle were studied.A multi-roll pendulum simulation model was established,and different multi-roller enthalpy simulation schemes with different oscillating taper and different processes were set up.Different taper,different feed rate and different core depths were used to form the multi-roller disk.Influence the law.The simulation of the 90-degree double-roller groove is carried out by using DEFORM-3D software,and the final forming effect is similar to that of the 90-degree coaxial multi-cone roll simulation.By transforming the existing 5000 k N tonnage double-roller rotary forging equipment double-roller into a multi-roller,the multi-roller squashing ratio forming experiment was carried out to test the forming process of the multi-roller swaying disc part,according to the swaying disc The parts were designed and manufactured with corresponding pendulum molds,and field experiments were carried out to obtain metal disc pendulum forming parts.The macroscopic deformation law was analyzed,and the variation of pendulum pressure and load during the experiment was recorded.The difference between the numerical simulation results and the pendulum disk was compared.The results of the double roll slotting experiment were consistent with the simulation results,indicating that the simulation scheme is.It is reasonable,and the process scheme can integrally form a metal disc member having a large diameter to specific thickness.