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用掺入粉末的工作液进行电火花加工由于工具电极和工件表面间形成大的静电电容,大面积电火花加工难以获得光洁表面。本文作者们曾用硅电极有效地解决了这一问题,并使加工表面耐腐蚀、耐磨损。然而用很硬很脆的硅作为工具电极材料有难于成形的缺点。本文介绍在工作液中掺入硅、铝、石墨等粉末后对电火花精加工所产生的效果。实验结果表明,即使所用的工具电极是紫铜电极,在石油类工作液中掺入上述粉末对于获得光洁表面非常有效。在同样的加工条件下,用铝粉或石墨粉能使加工表面比用硅粉时更为光洁。当在每升工作液中掺入2克铝粉而用紫铜工具电极加工 SKH—51高
EDM with Powder-Dosage Working Fluid Due to the large electrostatic capacitance formed between the tool electrode and the workpiece surface, it is difficult to obtain a clean surface with large-area EDM. The authors of this paper have effectively solved this problem with silicon electrodes and have made the machined surface corrosion-resistant and wear-resistant. However, the use of very hard and brittle silicon as a tool electrode material is difficult to shape the shortcomings. This article describes the working fluid incorporation of silicon, aluminum, graphite and other powder EDM after finishing the effect. The experimental results show that even if the tool electrode used is a copper electrode, the incorporation of the above powder in a petroleum-based working fluid is very effective in obtaining a smooth surface. In the same processing conditions, the use of aluminum powder or graphite powder can make the processed surface more smooth than the use of silica fume. When using 2 grams of aluminum powder per liter of working fluid and using a copper tool electrode to process SKH-51 high