In recent years, micro-sized V-shaped grooves have been designed on optical fiber docking, medical cell analysis, and photovoltaic cell lamp working substrates, which can produce new functions such as positioning of micro-fiber arrays and guidance of micro-cells. However, most of these high value-added substrates are made of hard and brittle materials that are difficult to process. Relying on low-efficiency and high-cost optical and chemical etching processing methods. This study proposes that micro-precision dressing using the V-shaped tip of the grinding wheel is a key technical issue to ensure the fineness of processing.

In the study, the grinding wheel used two dressing methods, CNC counter-grinding technology and contact discharge technology, to dress the V-shaped tip of the diamond grinding wheel, and the feasibility of fine dressing was analyzed. Moreover, a detection and evaluation model for the V-shaped tip angle and tip arc radius was established, the factors affecting the V-shaped tip forming quality of the diamond grinding wheel were studied, and the dressing accuracy and dressing efficiency were experimentally analyzed.

First, CNC counter-grinding technology was used to dress the V-shaped tip of the diamond grinding wheel and a processing experiment was conducted. The experimental results show that when the #600GC grinding stone is used to perform V-shaped tip counter grinding and dressing on the SD600 diamond grinding wheel, the tip arc radius can be less than 20 μm, and the fine diamond abrasive grains on the V-shaped tip can be trimmed and can be used. Micro-machining of micro-grooves. When processing single crystal silicon, the arc radius of the micro-groove tip reaches 28.3 μm, and its aspect ratio reaches 0.20. In addition, the cutting edge shape of micro-abrasive grains at the V-shaped tip has a great impact on dressing efficiency and machining accuracy. Compared with #180GC whetstone dressing, using #600GC dressing can obtain better micro-abrasive cutting edge morphology and increase the material removal rate by about 3 times in micro-groove processing. However, the dressing rate is reduced by 6-7 times. Thirdly, contact discharge was used to trim the V-shaped tip of the metal bond diamond grinding wheel.

Research has found that when the discharge voltage is 7V and the discharge frequency is 500Hz, a better forming angle and a smaller tip arc radius can be obtained. The dressing rate of contact discharge dressing is about 350 times that of #600GC oilstone dressing. The dressing efficiency It is about 59 times that of dressing with #600GC grinding stone. Finally, the trimmed V-shaped tip of the grinding wheel was used to process the micron-scale groove array and conical tower spatial array structures of the carbide turning tool head, optical fiber docking quartz substrate, Sic ceramics and wC carbide substrate. The experimental results have shown application prospects, which provide theoretical basis and basic parameters for promoting the application of diamond grinding wheel V-shaped tip in micro-machining.