Research On Cutting Of Single Crystal Copper Quadrilateral Pyramid Optical Functional Textured Mold

Optical functional textured films have a wide range of applications in the fields of optical systems,photovoltaic industry,road traffic signs,and lighting,and their high-quality and high-precision preparation methods have attracted more and more attention.At present,the optical functional textured film is mainly prepared in two ways:(1)the optical functional textured film is directly prepared on the component matrix;(2)the optical functional textured film is prepared by embossing the optical functional textured mold.Studies have shown that the method of preparing optically functionally textured molds by imprinting can obtain high-quality,high-precision,and high-efficiency optically functional textured films on a large scale.At present,most of the optical functional texture mold are made of polycrystalline copper,and the microstructures such as grain boundaries and grains in the polycrystalline copper material will affect the evolution of dislocation defects and the formation and evolution of subsurface damage,thereby affecting the polycrystalline,the processing precision and performance of copper.Single crystal copper has important application value in the field of precision instruments and electronics due to its excellent mechanical and physical properties,good plastic processing and fatigue resistance.It is an ideal material for making precision components.Compared with polycrystalline copper,single crystal copper material used in the preparation of optical functional texture mold can achieve better processing surface quality.This paper proposes to use single crystal copper as the material for preparing the quadrangular pyramid optical functional texture mold material.The four sides of the optical functional quadrangular pyramid texture mold unit are constructed by using the(111)crystal plane with the smallest bonding force in the single crystal copper structure.The cutting plan of the four-sided pyramid optical functional texture mold;and the influence of different cutting depths and cutting speeds on the surface roughness and exit burrs of the three crystal faces of single crystal copper in the ultra-precision cutting processing experiment of single crystal copper is analyzed and studied.And the trend of change,which provides the corresponding guiding significance for the ultra-precision processing of the single crystal copper light function quadrangular pyramid micro-texture mold with better surface quality.The research is mainly carried out from the following aspects:Based on the face-centered cubic crystal structure of single crystal copper,the relationship between the bonding force of the three crystal faces of single crystal copper is analyzed,and the crystal face with the smallest crystal face bonding force is selected as the four cuttings of the single crystal copper four-pyramid optical functional texture.On the side,the cutting plan of the single crystal copper quadrangular pyramid optical functional texture mold is planned.To study and analyze the influence of different cutting depths and cutting speeds on the surface roughness and export burrs of the three crystal faces of single crystal copper in ultra-precision cutting,and propose the three kinds of crystal faces for single crystal copper.The optimization plan of processing parameters achieves the goal of reducing burrs and surface roughness;and through the comparative analysis of the best surface roughness and exit burrs of the three processed crystal faces of single crystal copper,the three different crystals of single crystal copper are studied.Combining the optimal processing parameters and the cutting plan of single crystal copper quadrangular pyramid optical functional texture,the cutting experiment of single crystal copper quadrangular pyramid optical functional texture mold is carried out,and the single crystal copper quadrangular pyramid optical functional microtexture mode is analyzed.The surface quality of the mold unit and the definition of area ratio of retro-reflection K_Sare used to analyze and evaluate the effective optical functional area of the quadrangular pyramid optical functional texture mold.The research results show that the single crystal copper samples are processed by choosing different reference planes,and the surface roughness of(100),(110)and(111)three processed crystal planes is anisotropic.Among them,the(111)crystal plane has the characteristics of anisotropy.The processing surface quality is the best;the cutting plan of the four-sided pyramid optical function texture mold with(111)crystal faces is planned and designed,and the cutting experiment is carried out in combination with the best cutting parameters.The four side surfaces of the mold unit are average that the roughness can reach 6.57nm,which meets the requirements of optical element surface roughness less than 10nm;the effective optical function area is evaluated by area ratio of retro-reflection Ks.The average Ks value is 96.6%,which meets the processing quality requirements of the quadrangular pyramid optical functional texture mold.