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为实现确定磨盘的磨削深度控制,减少加工中不同粒度工具的更换次数从而提高加工效率,流体动压状态下的固结磨料加工工艺第一次被提出。在完成磨盘表面形貌建模的基础上,以磨盘和工件间隙中的磨削液膜为研究对象,建立了瞬态等温条件下的流体润滑方程,并利用显示有限差分算法求得数值解。计算结果表明:通过调节动压力来控制磨削深度是可行的,因为液膜动压力随磨盘最大磨削深度的减小而有明显的上升趋势,分布也趋于平坦;提高入口压力时,动压力明显增大,但也加剧了其分布的不均匀性;因为受制于磨盘表面形貌以及加工质量要求,转速对动压力的影响并不显著。
In order to achieve the control of the grinding depth of the grinding disc and reduce the changing times of the tools with different grain sizes in the process, the processing efficiency is improved. The processing technology of the consolidated abrasive under hydrodynamic pressure is proposed for the first time. Based on the modeling of the surface morphology of the disc, the fluid film in the gap between the disc and the workpiece is taken as the research object. The fluid lubrication equation under transient isothermal conditions is established and the numerical solution is obtained by using the finite difference method. The calculation results show that it is feasible to control the grinding depth by adjusting the dynamic pressure. Because the dynamic pressure of the liquid film obviously increases with the decrease of the maximum grinding depth, the distribution tends to be flat. When the inlet pressure is increased, The pressure increased significantly, but also exacerbated the distribution of non-uniformity; because of the surface morphology of the disc and processing quality requirements, speed on the dynamic pressure is not significant.