Preparation of surface micro-structured coarse-grained diamond wheels based on high efficiency mechanical conditioning and picosecond pulsed laser machining

The conditioned coarse-grained diamond wheels are able to achieve the identical surface roughness, higher form accuracy and larger material removal rate on optical glasses while larger grinding forces and deeper subsurface damage depth also could be inevitably introduced due to the flat tops of the coarse diamond grains. In order to overcome this problem, the precision grinding technique of optical glasses with micro-structured coarse-grained diamond grinding wheels was developed in recent years. This paper introduces a method for preparing surface micro-structured electroplated coarse-grained wheels. A high efficiency mechanical conditioning based on vitrified fine-grained diamond wheel for electroplated coarse-grained diamond wheel is introduced, firstly. Subsequently, 4 micro-structure surfaces with different micro-structure patterns are obtained by laser micro-structuring with picosecond pulsed laser. At last, three surface micro-structured electroplated coarse-grained diamond grinding wheels were successfully prepared based on the conditioning method introduced in this paper and micro-structuring with picosecond laser.