子孔径范成法铣磨半球及超半球光学整流罩  

Sub-aperture generating method for grinding hemispherical and hyperhemispherical optical dome

作　　者：叶斯哲 王朋[3] 张昊[3] 回长顺[3] YE Sizhe;WANG Peng;ZHANG Hao;HUI Changshun(Xiamen Institute of Rare Earth Materials,Haixi Institute,Chinese Academy of Sciences,Xiamen 361021,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen 361021,China;Tianjin Institute of Jinhang Technical Physics,Tianjin 300380,China)

机构地区：[1]中国科学院海西研究院厦门稀土材料研究中心,福建厦门361021 [2]厦门市稀土光电功能材料重点实验室,福建厦门361021 [3]天津津航技术物理研究所,天津300308

出　　处：《应用光学》2023年第6期1362-1370,共9页Journal of Applied Optics

基　　金：福建省中国科学院STS计划配套项目(2023T3002;2023T3085);医学光电科学与技术教育部重点实验室,福建省光子技术重点实验室开放课题(JYG2205);厦门稀土材料研究所自主部署项目(2023CX06)。

摘　　要：为攻克高陡度球面光学零件成型技术,以半球及超半球红外光学整流罩为研究对像,提出了一种子孔径铣磨加工方法。对传统范成法铣磨成型理论进行拓展,将球面离散为一系列子孔径环带,砂轮沿环带“步进”运动,拼接成型得到完整的球面。分析了成型球面与三轴机床位置坐标之间的转换关系,对加工运动轨迹进行仿真,开展半径误差补偿验证实验及变速进给参数优化实验,提出变半径铣磨法解决超半球加工材料过切问题。对长径比分别为0.5(半球)和0.55(超半球)的热压硫化锌、镁铝尖晶石整流罩开展成型工艺试验,加工表面各点矢高差<4μm,表面粗糙度Ra<1.5μm。实验结果表明:该方法为高陡度球面加工提供了有效的解决方案。In order to overcome the molding technology of high-steep spherical optical parts,a sub-aperture grinding method was proposed,taking the hemispherical and hyper-hemispherical infrared optical domes as the research object.The traditional generating method grinding forming theory is expanded,the spherical surface is discretized into a series of sub-aperture rings,the grinding wheel"steps"along the ring,and a complete spherical surface is obtained by splicing and forming.In this paper,the transformation relationship between the forming spherical surface and the position coordinates of the three-axis machine tool was analyzed,the machining motion trajectory was simulated,and the radius error compensation verification experiment and the variable feed parameter optimization experiment were conducted.A method of variable radius grinding was proposed to solve the problem of over-cutting of hyper-hemisphere machining materials.The forming process test was carried out on the hot-pressed zinc sulfide and magnesium-aluminum spinel spherical dome with the aspect ratios of 0.5(hemisphere)and 0.55(hyper-hemisphere)respectively,the sag height difference of each point on the processing surface<4μm,and the surface roughness Ra<1.5μm.The results show that the method is feasible and can provide an effective solution for deep high gradient spherical processing.

关 键 词：光学加工 铣磨 范成法 超半球 

分 类 号：TN205[电子电信—物理电子学] TG580.6[金属学及工艺—金属切削加工及机床]