Thermographic Analysis of Spark Location Distribution in Sinking EDM
Thermographic Analysis of Spark Location Distribution in Sinking EDM
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DOI：
10.1016/j.procir.2017.12.064
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
F. Klocke;S. Schneider;B. Frauenknecht;L. Hensgen;A. Klink;Kai Osswald
中科院分区：
文献类型：
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作者：
F. Klocke;S. Schneider;B. Frauenknecht;L. Hensgen;A. Klink;Kai Osswald
为了有一个很好的理解的热输入，因此在EDM过程中的温度演变，它是至关重要的，以获得洞察连续放电的二维位置分布。该分布影响从工件和工具电极的材料去除以及制造精度。因此，跨电极轮廓的放电分布的调查代表了非常相关的研究问题。因此，对于这篇文章的背面薄标本观察使用热成像相机，而前面是由S-EDM工艺加工。每一次放电都会在前面产生一个热输入，热输入通过试样传导，并在其后面产生一个热点。温度场由热成像相机记录。记录的数据由特定的图像数据处理软件进行分析，该软件检测热点并根据其二维位置对其进行分类。在另一步骤中，将加工数据与图像数据进行比较，以便将放电能量分配给放电位置。这种比较提供了在S-EDM过程中的时间和空间分辨的能量分布。
In order to have a good comprehension of the heat input and hence the temperature evolution in the EDM process it is crucial to gain an insight into the two-dimensional position distribution of consecutive discharges. This distribution affects the material removal from the workpiece and tool electrodes as well as the manufacturing precision. Consequently, an investigation of the discharge distribution across the electrode profile represents a very relevant research issue. Therefore, for this article the rear side of thin specimens was observed using a thermographic camera whilst the front was machined by a S-EDM process. Every discharge caused a heat input on the front, which was conducted through the specimen and generated a hot spot on its rear. The temperature field was recorded by a thermographic camera. The recorded data were analyzed by a specific image data processing software, which detected the hot spots and classified them according to their two-dimensional position. In a further step, the machining data was compared to the image data in order to assign the discharge energy to the discharge location. This comparison provides the time- and spatial-resolved energy distribution during the S-EDM process.