Research And Optimization Design Of Static And Dynamic Performance Of The Support Structure Of The Inverted Puller

The inverted disc puller machine is one of the important equipment for drawing pipes.It has been widely used due to its advantages of high efficiency,fast speed and good performance of finished products.At present,the domestic market of the machine output tends to saturation,manufacturers urgently need to expand the foreign market,but the vibration of the machine support structure seriously affected the export.This paper focuses on the research object of a disc puller machine of Suzhou Aozhi intelligent equipment co.LTD.Centering on the central problem of reducing the vibration of the disc puller machine,it studies and optimizes the static and dynamic characteristics of the support structure of the disc puller.The main contents are as follows:(1)The 3d model of the key part of the support structure is established and the modal analysis is carried out by using the finite element software.The natural frequency and mode of the main platform are obtained by the modal experiment of "hammering method".By comparing the experimental mode with the computational mode,the accuracy of finite element modeling was verified,and the weakness of the main platform was analyzed.All the components are assembled into the support structure according to the assembly relationship,and the overall frequency and mode of the support structure are calculated and analyzed.(2)The vibration test under the motion state of the reduction gear transmission system of the disc puller is carried out by using the signal acquisition box and LabVIEW software,and the vibration data when the rotation speed changes from 300r/min to 1000r/min are obtained.By using MATLAB to analyze the vibration acceleration data,the range of the actual excitation frequency caused by the vibration source is found,and the optimization target of the natural frequency of the supporting structure is defined.The corresponding vibration reduction methods are proposed for the vibration source inside the machine and the vibration source outside the machine.(3)The static characteristics of the supporting structure are analyzed for the normal and extreme working conditions and the strength and stiffness of the supporting structure are verified.According to the static analysis results,combined with the structural optimization method,the support structure is optimized by using ANSYS software to make its structure more reasonable on the premise of ensuring the safety and reliability of the support structure.The static and dynamic characteristics of the optimized structure are further analyzed,and the optimized results are evaluated.(4)This paper analyzes the causes of the vibration of the pipe wound on the drum when it falls.A brief pressure release device is designed for bending stress and the friction force is analyzed from the angle of friction coefficient and lubrication.ABAQUS is used to simulate the stress and deformation of pipes under different friction coefficients.The results show that the smaller the friction coefficient is,the smaller the drawing deformation of pipes will be,indicating the importance of reasonable lubrication.