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首页> 外文期刊>Journal of Manufacturing Processes >Experimental studies of heat dissipation by a stream of dressing products during dry dressing of conventional ceramic grinding wheels
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Experimental studies of heat dissipation by a stream of dressing products during dry dressing of conventional ceramic grinding wheels

机译：传统陶瓷砂轮干式修整过程中修整产品流散热的实验研究

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摘要

Part of the energy required to perform the dressing process is converted into heat, which is generated by friction and elastic-plastic deformations occurring in the contact area of diamond grit and the grinding wheel. This heat is diffused by thermal conduction in the direction of the grinding wheel and the body of the dresser, electromagnetic radiation, convection and it is also transferred through the particle stream of dressing products. This article describes the assessment method and the results of the research on the amount of heat accumulated in the stream of the particles of the dressing products. In the presented method, the enthalpy of the stream was estimated based on the measurements of electrical voltage generated by the Peltier module set in a short distance from the point of stream formation, transversely to the direction of its movement. The method of determining the thermal-voltage characteristics of the module necessary to determine the amount of heat released by the particle stream is described. The research of enthalpy streams was carried out during dry dressing of conventional ceramic grinding wheels made of brown and white fused aluminum oxide and green silicon carbide. Dressing studies were performed with a single point diamond dresser using various feed values and dressing depths. Measurements of the Peltier module voltage were carried out simultaneously with measurements of the diamond grain temperature in the dresser and the power of dressing. On the basis of the obtained results, the correlation of the module voltage signals and the diamond temperature is evaluated. Furthermore the influence of dressing parameters and type of grinding wheel abrasive material on the magnitude of stream enthalpy and its share in dressing energy are also evaluated. The studies show that the module voltage remains in almost full, linear correlation (rho 0.95) with the diamond dresser temperature; the amount of heat carried by the stream constitutes a few percentage points (2%-5%) part of the dressing energy, and the amount of this share increases with the increase of the thermal conductivity of the grinding wheel material and dressing volume capacity.
机译：进行修整过程所需的部分能量转换为热量，该热量是由金刚石砂砾和砂轮接触区域中发生的摩擦和弹塑性变形产生的。这些热量通过热传导沿砂轮和修整器的主体，电磁辐射，对流方向扩散，并且也通过修整产品的颗粒流传递。本文介绍了敷料产品颗粒流中积聚的热量的评估方法和研究结果。在提出的方法中，根据珀耳帖模块所产生的电压测量值来估算流的焓，该珀耳帖模块设置在与流形成点成横向的短距离内，垂直于流的运动方向。描述了确定模块的热电压特性的方法，该模块确定由粒子流释放的热量所必需的。焓流的研究是在传统修整由棕色和白色熔融氧化铝和绿色碳化硅制成的传统陶瓷砂轮的过程中进行的。使用各种进给值和修整深度的单点金刚石修整器进行修整研究。珀耳帖模块电压的测量与修整器中金刚石晶粒温度和修整功率的测量同时进行。根据获得的结果，评估模块电压信号和金刚石温度的相关性。此外，还评估了修整参数和砂轮磨料类型对流焓的大小及其在修整能量中所占份额的影响。研究表明，模块电压与金刚石修整器温度保持几乎完全线性相关（rho> 0.95）。气流所携带的热量构成修整能量的几个百分点（2％-5％），并且随着砂轮材料的导热系数和修整体积容量的增加，该份额的热量也会增加。

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