Dry electrical discharge dressing and truing of diamond grinding wheel V-tip for micro-grinding

Abstract

Abstract:The dry electrical discharge dressing and truing technology was proposed to realize the high efficient and precise truing of diamond grinding wheel in this paper. Firstly, the V-shape tip of diamond grinding wheel was formed using dry electro-contact discharge (ECD) truing along setting crossed V-shape interpolation path. Secondly, the influence of different pulse discharge parameters on V-tip angle and V-tip radius was investigated, respectively. Finally, the trued V-tip diamond wheel was employed to fabricate micro-groove and micro-pyramid array structures on the surfaces of two hard and brittle materials by micro-grinding machining. The results indicated that the optimal pulse discharge parameters were open-circuit voltage E of 5V, pulse frequency f of 4000Hz and duty cycle d c of 50%. The least V-tip angle error and radius of trued SD600 V-tip diamond grinding wheel was 1.1º and 33 µm, respectively. The micro-groove and micro-pyramid structures with regular shape and smooth surface can was effectively machined on the surfaces of difficult-to-cut materials.

Fabrication of Micro-Structured LED Diffusion Plate Using Efficient Micro Injection Molding and Micro-Ground Mold Core

“…Therefore, under the premise of environmental protection and high efficiency, it is very difficult to process a micro-structured mold with high shape accuracy and surface quality at the micron scale. The previously developed micro-grinding technology may be used to machine high-quality microarray structures with controllable shape accuracy on the surface of hard and brittle mold materials [19,20]. Moreover, the environmentally friendly and pollution-free processing method has a low production cost and was a simple operation.…”