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辊子是光学薄膜模压制造的关键零件,其圆柱表面微结构复杂,表面粗糙度要求也极高.超精密车削成形作为微结构的一种高效加工方式,其加工的可达性、伺服刀具动态特性的制约、海量微结构的加工长时一致性等是高质量辊子微结构加工所需解决的关键问题.本文以圆柱球面微结构阵列为例,从其数学描述入手,分析了刀具几何尺寸、伺服系统动态特性与微结构加工可达性之间的制约关系,并在自主研制的超精密车床和快刀伺服系统上进行了两种球面微结构的加工实验,得到了预期的微结构形貌,并对加工实验中发现的切深不一致现象给出了初步的解释.
Roller is a key part in the optical film molding, and its cylindrical surface has complex microstructure and high surface roughness. Ultra-precision turning forming is an efficient processing method of microstructure. Its processing reachability, servo tool dynamic characteristics , The long-term consistency of the massive microstructure processing is the key problem to be solved in the high-quality roller micro-structure machining.In this paper, taking the cylindrical micro-structure array as an example, starting with its mathematical description, the paper analyzes the geometric parameters of the cutter, servo System dynamics and microstructure processing reachability between the constraints and the independent research and development of ultra-precision lathe and servo servo system for two kinds of spherical microstructure processing experiments obtained the desired microstructure morphology and A preliminary explanation is given on the inconsistency of depth of cut found in the processing experiment.