Abstract
The evolution of electrical appliances, such as digital cameras, mobile phones with integrated cameras, and liquid crystal displays, has resulted in the requirement for high degrees of precision and quality. To manufacture such appliances, optical devices that use aspheric molds for lenses must satisfy specific geometric precision and surface roughness characteristics, and this is usually achieved by using monocrystalline diamond tools.1) An experiment was performed to compare the influence of the material of the cutting edge of a milling tool on the surface roughness of an aluminum A7075 block. The materials tested were monocrystalline diamond, polycrystalline diamond (PCD), and tungsten carbide. The surface roughness results show that the PCD, tungsten carbide, and monocrystalline diamond left Ra of 300, 200, and 50 nm, respectively.
