Abstract
In previous studies, the improvement of the useful flow and flow rate of grinding fluid has been investigated via modeling, simulation, and experiment. Optimized grinding parameters have been achieved. A detailed assessment of the improvement in the useful flow rate of grinding fluid, which optimizes the grinding fluid supply, has been published in the International Journal of Advanced Manufacturing Technology (Li et al. Int J Adv Manuf Technol 75:1587–1604, 2014). Then, a detailed experimental study on the improvement in the useful flow rate of grinding fluid has been published in the International Journal of Advanced Manufacturing Technology (Li et al. Int J Adv Manuf Technol 1–10. doi: 10.1007/s00170-015-7230-z , 2015), in which the influence of grinding wheel speed, grinding fluid jet velocity, particle size, and bulk porosity on useful flow and useful flow rate was analyzed. In this paper, a new method of air scraper is presented and simulated with focus on the air boundary layer and reflux around the grinding wheel. In view of the influence of the gas barrier of grinding wheels on the effective supply of grinding fluid, the effect of the scraper on the gas barrier layer was analyzed through the grinding flow field simulation under unified grinding parameters. Using the air scraper to destroy the gas barrier layer is proposed, and a supply scheme is designed to improve the useful flow rate. Results show that using the scraper has a certain effect on the weakening of the grinding gas barrier layer. In the grinding process, using the scraper can reduce the obstacles to grinding fluid supply, thereby improving the useful flow of grinding fluid into grinding wheel workpieces. The distance between the front end of the plane scraper and the grinding wheel is 10 μm, with a large circular boot-shaped nozzle. Alternatively, the distance between the front end of the nozzle and the grinding wheel surface is 50 μm, which can increase the useful rate of flow of grinding fluid.
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