Multi-stage directional diamond grinding wheel dressing device and method based on cavitation effect

The invention provides a multi-stage directional diamond grinding wheel dressing device and method based on the cavitation effect. The multi-stage directional diamond grinding wheel dressing device and method are used for solving the problem that grinding fluid is affected by an air barrier layer and difficultly enters a grinding core area, and grinding dust cannot be effectively removed for online dressing. The grinding fluid is rotationally cut by the honeycomb structure plate to form gas-liquid two-phase grinding fluid, and then the gas-liquid two-phase grinding fluid is accelerated, and sodium percarbonate is accelerated by the small Venturi tube to be blended into the grinding fluid to form gas-solid-liquid three-phase grinding fluid; the grinding fluid is directionally guided to radially impact the grinding core area through a barrier breaking wheel set in the lateral direction of the grinding wheel working area by a siphonic effect formed by air pressure difference generated by high-temperature gasific