基于热管技术的磨削弧区强化换热研究

发布时间：2018-05-30 20:16

本文选题：热管砂轮 + 传热性能　；参考：《机械工程学报》2017年07期

【摘要】：针对高效磨削中存在的磨削弧区热问题,有学者提出借鉴热工领域高效传热的热管技术来实现强化磨削弧区换热的构想。通过对热管砂轮结构的设计以及传热过程的理论分析,确定了影响热管砂轮传热性能的主要因素为工质种类、工质注液量和砂轮转速。并在搭建的传热性能试验平台上完成了热管砂轮基体的传热性能试验,探索了这些因素对热管砂轮传热性能的影响规律,确定了热管砂轮可用于缓进给深切磨削。在热管砂轮中注入18 g蒸馏水进行了电镀CBN热管砂轮与无热管砂轮缓进给深切磨削高温合金GH4169的对比试验,通过对比两种砂轮磨削条件下磨削弧区的平均温度、工件表面质量、工件表层金相组织、显微硬度以及磨削后砂轮表面形貌等,证实了热管砂轮的确具有优良的强化换热效果,可在无热管砂轮磨削发生严重烧伤的情况下将磨削弧区的温度控制在60℃以下的较低水平。
[Abstract]:In view of the heat problem in the grinding arc area in high efficiency grinding, some scholars have proposed the idea of strengthening the heat transfer in the grinding arc region by using the heat pipe technology of high efficiency heat transfer in the field of thermal engineering. By the design of the structure of the heat pipe grinding wheel and the theoretical analysis of the heat transfer process, the main factors affecting the heat transfer performance of the heat pipe sand wheel are the types of the working material. The heat transfer performance test of the heat pipe grinding wheel base was completed on the set of heat transfer performance test platform, and the influence of these factors on the heat transfer performance of the heat pipe grinding wheel was explored. The heat pipe grinding wheel could be used for slow feed deep grinding. The 18 g distilled water was injected into the heat pipe grinding wheel to carry out the electroplated CBN heat pipe sand. By comparing the average temperature of the grinding arc in the grinding zone of the two kinds of grinding wheels, the surface quality of the workpiece, the microstructure of the workpiece surface, the microhardness and the surface appearance of the grinding wheel after grinding are compared. It is proved that the heat pipe grinding wheel has a good strengthening heat transfer effect by comparing the average temperature of the grinding arc region under the grinding conditions of the two kinds of grinding wheels. The temperature of the grinding arc area can be controlled below the 60 degree below the serious burn of grinding without heat pipe grinding wheel.
【作者单位】：南京航空航天大学机电学院;河南工业大学机电工程学院;
【基金】：国家自然科学基金资助项目(51175254)
【分类号】：TG580.6

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