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为研究新型微晶刚玉砂轮成形磨削温度场,根据热量分配原理计算了成形磨齿的热源强度与热量分配比,基于ABAQUS建立了单齿模型并定义相关参数及边界条件,采用三角形移动热源模型进行了干、湿磨工况下的温度场仿真。结果表明:磨削过程齿面最高温度的位置位于几何接触长度的中心位置,干、湿磨时的最高温度分别可达560.4、289.4℃;干磨时齿形截面的节点温度沿齿面向下深度方向不断下降,在0~0.3 mm时温度梯度较大,可达到584℃/mm;湿磨时磨削区最高温度随着砂轮线速度和径向进给量的减小而降低,随着进给速度的增大呈现先降后升的趋势,在vw=5.5 m/min处出现拐点。
In order to study the temperature field of the new microcrystalline corundum grinding wheel, the heat source intensity and heat distribution ratio of the formed grinding tooth were calculated according to the principle of heat distribution. The single tooth model was established based on ABAQUS and the related parameters and boundary conditions were defined. The temperature field simulation under dry and wet conditions was carried out. The results show that the maximum temperature of the tooth surface in the grinding process is located at the center of the geometric contact length, and the maximum temperatures are 560.4 and 289.4 ℃ respectively in dry and wet grinding. The direction of descent continues. At 0 ~ 0.3 mm, the temperature gradient is larger, reaching 584 ℃ / mm. The maximum temperature of grinding zone decreases with the decrease of wheel speed and radial feed rate, The increase of the speed showed a tendency of first decreasing and then rising, and the inflection point appeared at vw = 5.5 m / min.