Research On Machining Process Of Poly-Ether-Ether-Ketone(PEEK) Thin Wall Ring

Poly-Ether-Ether-Ketone(PEEK)is a new type of semi-crystalline polymer with great application potential.Because of its excellent performance,it has become the material for preparing thin-walled ring molds in the mainstream spot plating process of integrated circuits.However,due to the high plasticity of the PEEK material,the large size,weak rigidity,and high material removal rate of the thin-walled ring,the processing deformation of PEEK thin-walled parts during the preparation process is large,resulting in lower processing accuracy,which affects the performance and downstream of the workpiece Product accuracy.Therefore,this article focuses on the accuracy of PEEK-550 G thin-walled ring workpieces in the process of machining,combined with material performance research,using finite element simulation technology to perform dynamic and static analysis of the process,predict and control deformation,and carry out related measurements and process tests.The verification of the model and process optimization,and provide guidance for actual production.Study the mechanical properties of PEEK-550 G material and obtain the material constitutive model parameters.Through uniaxial tensile experiment,the mechanical properties of PEEK-550 G material are obtained,and the constitutive model of PEEK-550 G material is fitted based on the experimental data.The tensile test is replicated in the ABAQUS finite element simulation software to verify the accuracy of the constitutive parameters,which lays the parameter foundation for the dynamic and static finite element simulation of PEEK-550 G material.Carry out experiment and simulation research on PEEK-550 G material plane cutting.Orthogonal process experiment is designed,PEEK-550 G material is flatturned,and the surface quality of the processed surface is detected by a roughness meter,and the degree of influence of turning parameters on the surface roughness of the material is analyzed,and the process parameters are optimized.Based on the optimal parameter combination,a single-factor experiment of plane cutting is carried out to study the influence of different process parameters on the surface roughness of the material.The PEEK-550 G plane cutting finite element simulation model was established,and the influence of tool rake angle and process parameters on cutting force and residual stress in the machining process was studied based on this,and the influence of tool and process parameters on material surface quality was further revealed.Carry out simulation and experimental research on PEEK-550 G thin-walled ring clamping conditions.According to the actual clamping conditions,establish a static simulation model of PEEK-550 G thin-walled ring clamping conditions,study the deformation of the workpiece and fixture under the original clamping conditions,and analyze the influence of different fixture materials and structural dimensions on the deformation of the thin-walled ring,And design measurement experiments,using displacement sensors and other instruments to extract the surface profile of the thin-walled ring before and after different clamping conditions,analyze the radial,axial,and circumferential deformation of the workpiece under different clamping conditions,and comprehensively analyze the source of error.Carry out the experiment and simulation study of PEEK-550 G thin-walled ring outer circle cutting.Carry out the single factor experiment of external turning of PEEK-550 G thin-walled ring,use the three-coordinate measuring instrument to measure the roundness of the workpiece,study the relationship between the process parameters and the roundness of the workpiece,and establish the external cutting of the PEEK-550 G thin-walled ring based on the external turning experiment The finite element simulation model analyzes the influence of process parameters on the cutting shape,cutting force,and residual stress,and further explains the law of influence on roundness.Finally,through the orthogonal experiment of outer circle cutting,parameter optimization was carried out,and the influence of the clamping and process parameter optimization plan on the roundness,roundness deviation and diameter deviation of the workpiece was comprehensively evaluated,which effectively improved the machining accuracy of the PEEK-550 G thin-walled ring.