Structural Optimization Design And Dynamic Characteristics Analysis Of Flexible Drilling Machine

Drilling is a widely used production process in the production process.With the rapid development of manufacturing technology,various new drilling and processing equipment are also emerging.However,through research status analysis and market research,it is found that it is currently used in batches in some industries.The drilling processing equipment produced still has problems such as low production efficiency,poor precision,and high cost.This article develops a flexible drilling machine tool with high production efficiency and good structural rigidity in accordance with the processing requirements of the core component of the textile equipment circular knitting machine.Use SOLIDWORKS software to establish its three-dimensional model,use ANSYS Workbench software to analyze the statics and dynamics of the machine tool,and perform multi-objective optimization of the machine tool,and verify the reliability of the simulation analysis through modal experiments.The main research contents are as follows:First,initially determine the overall layout plan of the flexible drilling machine tool according to the parts processing requirements;determine the design plan of the drilling power head of the machine tool through the calculation of drilling parameters;carry out detailed structural design of the drilling power head and key components of the machine tool,And use SOLIDWORKS to establish a three-dimensional structure model of the whole machine.Second,use ANSYS Workbench to establish a finite element model of the entire flexible drilling machine,apply boundary load conditions according to actual working conditions,and analyze the static and dynamic characteristics of the entire machine.The static analysis shows that the maximum displacement of the entire machine is177.21μm.,The maximum stress is 17.635MPa;the main vibration mode and the first six-order natural frequency are obtained through modal analysis,and the first-order natural frequency is easy to cause machine tool resonance through the combination of harmonic response analysis.The static and dynamic stiffness changes,and find its weak links and optimizable space.Third,in the ANSYS Workbench software,the lightweight design of the base was carried out through topology optimization,and the pseudo-density distribution map of the base material was obtained.The base was optimized and improved through the optimal material distribution to realize the lightweight design,and the response surface size optimization method was used to optimize the whole machine.The structure is further optimized and designed,the mathematical model is established according to the multi-objective genetic algorithm,and the optimal design scheme is found.The optimization results show that after optimization,the mass of the whole machine is reduced by 7.2%,the maximum deformation is reduced by 23.1%,and the first-order natural frequency is increased by 33.6%,achieving the expected goal of optimization of the whole machine.Fourth,the modal experiment method is used to conduct dynamic test experiments on the whole flexible drilling machine tool using LMS equipment,and compare with the finite element static and dynamic characteristics analysis results to verify the accuracy of the finite element analysis and the reliability of optimization.The results show that the natural frequencies of the gantry and base obtained from the experiment are basically consistent with the modal analysis results,which verifies the reliability of the finite element model and the rationality of the finite element analysis results.