Simulation And Experimental Study On Grinding Fluid Jet

Grinding is the most widely used in machining precision processing methods, taking a very important role in mechanic operation process. In the grinding process, the workpiece surface will generate a lot of heat, in order to suppress surface temperature rise, the supply must be adequate to the grinding zone cooling fluid, However, due to high pressure grinding zone around the field there, actually a large number of cooling fluid into the grinding zone can not be effective. Studies have indicated that, under normal circumstances, the effective area of the grinding fluid into the arc of only4%of the total grinding fluid. It’s indicate that generally normal grinding, despite the grinding arc area surrounded by fluid, but the actual grinding into the arc zone cooling fluid is very small and can only play a peripheral cooling. With the continuous increase grinding speed, high pressure grinding fluid flow field on the impediment will continue to increase. Therefore, the study and analysis of flow fields and grinding fluid interaction mechanism in the grinding zone, and then grinding fluid for improving the effective proportion of important works in practice.In this article, we study the grinding fluid jet on, in accordance with ordinary grinding fluid for the fluid characteristics, based on fluid dynamics and computational fluid dynamics, used numerical simulation methods and large-scale finite element analysis software FLUENT, the introduction of VOF phase flow model, build up an instantaneous model describing properties of gas-liquid two-phase flow field, which emerges in due course of coolant jetting into gas flow field. Finally, the instantaneous model is solved out in the case of no special pressure conditions exerted on the outlet boundary, by changing the grinding wheel speed and minimum clearance, in order to analysis various parameters on two-phase flow field characteristics. In experiment, by changing the grinding fluid for fluid flow and incident angle, for solution parameters of grinding fluid to be processed on the surface quality of the sample system. Three-dimensional contour scanner and scanning electron microscope to measure the surface quality of the specimen to be evaluated, and thus verification of the simulation experiment.In determining the location of grinding fluid jet, the need to air pressure distribution and velocity distribution as the basis. To do this, first create a finite model for grinding air. Simulation to solve the different wheel speed and minimum clearance under grinding pressure distribution and flow field velocity.The results show that:The VOF method to simulate the grinding fluid jet is feasible. Analysis of grinding fluid jet flow field position in the line AB at the top speed to zero contribute to the effective ratio of grinding fluid. With a reasonable increase of grinding fluid note conditions, less grinding fluid processing can be realized.