基于ABAQUS的新型微晶刚玉砂轮成形磨削温度场仿真

摘要

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.%To study gear form grinding temperature field with new microcrystalline corundum wheel,the heat source intensity and the heat distribution ratio of gear form grinding are calculated according to grinding heat distribution principle,a single spur gear model is established and the initial conditions and boundary conditions are defined based on ABAQUS,and the temperature field of dry grinding and wet grinding is simulated by using triangular moving heat source model.The results show that the highest temperature of the gear tooth surface is located at the center of the geometric contact arc length,the highest temperature of dry grinding and wet grinding is up to 560.4 ℃ and 289.4 ℃ respectively;the node temperature of tooth profile cross section decreases along the tooth surface downward in the depth direction under the dry grinding conditions,the temperature gradient in 0-0.3 mm is large,which is 584 ℃/mm;the maximum temperature of the grinding zone decreases with the decrease of the wheel velocity and the radial feed rate,and decreases first and then increases with the increase of feed velocity under the wet grinding conditions;the inflection point appears at vw =5.5 m/min.