砂带磨削接触压强模型分析与实验

为验证赫兹接触模型在砂带磨削中应用的准确性，利用ABAQUS软件建立砂带磨削接触有限元模型，分析厚度比、橡胶硬度、接触压力和工件的曲率半径等因素对接触压强和接触参数的影响，以橡胶接触轮与平面和曲面工件的接触实验验证模型的合理性。分析和实验结果表明:忽略影响较小的因素，砂带磨削接触状态基本符合赫兹接触理论。当圆柱接触轮与曲面工件接触时，接触应力分布呈半椭球型，有限元分析与实验结果验证其准确性；当厚度比为20%，橡胶的肖氏硬度为70 HS时，橡胶接触轮的力学性能与赫兹接触理论误差最小。 

Model analysis and experiment of contact pressure in belt grinding

To verify the accuracy of Hertz contact model in belt grinding, a contact finite element model of abrasive belt grinding is established by using ABAQUS software.The influence of several factors on the contact pressure and the contact parameters are analyzed, namely the thickness ratio, the rubber hardness, the contact pressure and the curvature radius of workpiece.The rationality of the model is proved by contact experiment between the rubber contact wheel and the planar or curved workpiece.The results of analysis and test show that the contact state of abrasive belt grinding is basically in accordance with Hertz contact theory, ignoring the less influential factors.When the cylindrical contact wheel is in contact with the curved workpiece, the contact stress distribution is semi ellipsoidal, which is verified by the finite element analysis and the test results.When the thickness ratio is 20% and the Shore hardness of rubber is 70 HS, the mechanical properties of the rubber contact wheel have the least error with the Hertz contact theory.