单点金刚石车削技术广泛应用于红外脆性晶体材料光学表面的加工。然而, 受车削参数、材料特性、刀具参数等多因素的影响, 将会导致车削表面质量的不均匀。为了获得更为均匀优质的表面质量, 在分析单点金刚石车削影响因素的基础上, 提出了等距恒速的车削方法。详细介绍了等距恒速车削的原理, 分析了车削参数的确定过程, 得到了等距恒速车削的工件转速和进给速度曲线。最后应用一CVD ZnS 材料进行了车削试验, 获得了该材料车削最佳的线速度, 应用此参数进行车削, 得到了均匀优质的车削表面, 整体表面粗糙度由Ra=6.4 nm降低到了Ra=4.1 nm。

Single Point Diamond Turing(SPDT) technology has been widely used in the infrared optical surface manufacturing field. However, the micro-nano texture of turned surface is influenced by the turning parameters, the infrared material properties, tip′s parameters of the diamond tools and so on. Based on the detailed analyses of the factors which will affect the turned surface quality during the infrared optical surface SPDT process, a new type of cutting movement that called Evenly tool marks Space and Constant linear Velocity(ESCV) cutting method was proposed for obtaining high surface quality in the paper. The principle of the ESCV method was introduced in detail, the process of cutting parameters determination of the ESCV was given out, and the curve of spindle speed and federate of the ESCV was simulated based on the cutting parameters. A CVD ZnS workpiece was turned via ESCV method, it′s best cutting linear velocity was 3.14 m/s, the Ra value of whole surface roughness was decreased from 6.4 nm to 4.1 nm before and after ESCV. The uniform quality turned surface is gained.