Simulation Research On The Surface Ground With Order Distributed Grains

The abrasive tools with different diamond mesh are applied in the grinding of granite materials, which include several working procedures such as rough grinding, fine grinding and polishing, in order to obtain the ground granite surface with a low roughness and a high glossiness. For forecasting and evaluating the ground granite surface quality of workpiece, it is necessary to simulate the ground surface topography of workpiece.Because now most of abrasive tools used in the grinding of granite materials are consolidated abrasive tools, the working surface of abrasive tools generally is composed of a large number of grits that distribute random and discrete on the surface of abrasive tools, during the grinding of granite materials, the abrasive grits distribution on the surface of abrasive tools is absolutely disorder and changed quickly, not only this tools exist many disadvantageous effect in the grinding process, but also have a big obstacle in the simulation of the ground granite surface topography. But diamond abrasive tools which applied brazed superabrasive technology to fabricate could realize the ordered distribution of the diamond abrasive grits, so we could fabricate the optimization-designed diamond abrasive tools according to the different machining demand, that is easy to realize the simulation of the ground granite surface topography, so the investigation based on the application of brazed diamond tools in the grinding of granite materials.This paper first build mathematics simulation model of the grit locus, then combined with the software Matlab and the designed distribution of abrasive grits, we could deduce the equation of locus of any abrasive grit moving on the granite surface and the ground granite surface topography. In research of grinding experiment applied brazed diamond tools, Comparing the simulated result with the experiment result, you could find that the ground granite surface topography is consistent with the simulated surface topography, the distribution of the ground surface locus have regularity. The locus of ground of each abrasive grit have repeatability and evenly distribution, that is to say two optional adjacent geometric locus have the same spacing. The bigger the disk feeding rate and the disk rotational speed is, the smaller the space is, so we could obtain the bigger density of the geometric locus and the smaller roughness of surface. But on different location of the ground granite surface, the density of locus also have regularity, in the direction from the locus of the central axis of the abrasive tool to edge of the locus, the density of locus change from small to big, the area of rhombus which the locus cross to form also change from big to small, so the surface roughness change from big to small. Combined with simulation model , on the one hand, we could estimate and judge the quality of ground granite surface; on the other hand, we could design the distribution of abrasive grits and the corresponding machining parameters according to the machining demand, in order to achieve the objective that is remove the materials of granite surface with limited abrasive grits, improve the machining efficiency and reduce the machining cost.