Diamond parameter design and assessment of a novel 3D printed diamond grinding wheel with linear cooling channels

To solve the problems of a metal-bonded diamond grinding wheel in grinding hard and brittle material parts, such as easy blockage, poor cooling capacity, and insufficient self-sharpening, a 3D printed diamond grinding wheel with linear cooling channels (GWLCC) was proposed, and its basic parameters were analyzed in this paper. The new grinding wheels with different diamond parameters were prepared by using dual-filament 3D printing technology. The hardness and relative density of the grinding wheels were measured, and the grinding tests of red sandstone were carried out. The experimental results show that high volume concentration and fine granularity of diamond particles are more likely to cause agglomeration behavior, resulting in more pores and cracks, thus reducing the relative density of the grinding wheel and matrix strength, but this is conducive to the exposure of diamond particles. The grinding efficiency of the diamond grinding wheel is positively correlated with the volume concentration and grain size of the diamond. Besides, a test of the grinding performance of GWLCC with different diamond parameters in grinding different brittle-hard materials was carried out, and the suitability of the new 3D printed grinding wheel and its potential to improve grinding performance has been proven. The GWLCC suitable for different hard and brittle materials are summarized.