摘要
首先使用热电偶测量平面磨削时CBN砂轮与工件接触区下方处不同位置点温度;然后基于传热反问题理论,优化实际测量温度值与理论仿真温度值间的目标函数,反算出进入工件的热量,从而得出进入工件的能量比例;最后建立磨削三维热模型,计算出不同磨削时刻工件表面温度。实验结果表明,CBN砂轮进入工件的能量比例与实际值相吻合,基于传热反算方法建立磨削三维热模型具有可行性。
First, the temperature of workpiece was measured by the embedded thermocouples at different locations under the contact area. Then based on the theory of heat transfer inverse, the heat flux toward the workpiece can be back calculated by the optimized objective function that compared the difference between the thermal model and experimental results, thus, the partition of energy entered into the workpiece can be obtained. Finally a three-dimensional model can be developed and the temperature of workpiece surface can be calculated during grinding process. The experimental results show that the energy partition into the workpiece with CBN grinding wheel matches with predicted value and feasibility using heat transfer inverse method to develop the 3D thermal model for grinding is proven.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2013年第18期2480-2484,共5页
China Mechanical Engineering
基金
国家重大科技专项(2012ZX04001021)
关键词
磨削
三维热模型
传热反算
能量比例
CBN砂轮
grinding
3D thermal model
heat transfer inverse
energy partition
CBN grinding wheel
