Micro EDM with controlled pulse train method using small feeding capacitance
Micro EDM with controlled pulse train method using small feeding capacitance
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使用小进给电容的受控脉冲序列方法的微细电火花加工
DOI：
10.1016/j.procir.2016.02.311
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Masanori Kunieda
中科院分区：
文献类型：
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作者：
Norliana Mohd Abbas;Masanori Kunieda
本文介绍了受控脉冲序列法（CPTM）和考虑电路谐振的CPTM的实现方法。这项工作是使用设置的非接触电进给微细电火花加工与高速工具电极旋转。在该设置中，圆柱形馈电电极同轴地固定到工具电极保持器。在两个表面之间形成电容C1，实现非接触供电，并允许刀具高速旋转而无振动。然而，使用这种设置，由于C1非常小，因此难以使用大放电能量进行加工。因此，开发了CPTM，以允许在脉冲串持续时间内发生几次放电。因此，实现了更大直径的弹坑。此外，CPTM考虑电路中的谐振导致更高的平均放电能量每脉冲。结果表明，在相同的C1下，放电直径最大。使用高速摄像机从垂直于加工表面的方向通过透明电极观察放电位置。结果表明，在脉冲串持续时间内的放电集中在同一位置，即使有一个放电之间的间隔。
This paper describes the implementation of controlled pulse train method (CPTM) and CPTM considering resonance in the circuit. This work was performed using the setup of non-contact electrical feeding micro EDM with high speed tool electrode rotation. In this setup, a cylindrical feeding electrode is fixed coaxially to the tool electrode holder. CapacitanceC1is formed between the two surfaces, realizing the non-contact electrical feeding and permits the tool to be rotated at high speed without vibration. Using this setup however, sinceC1is very small, machining with large discharge energy is difficult. Hence, CPTM was developed to allow several discharges to occur within the pulse train duration. Thus, larger diameter of crater was achieved. Furthermore, CPTM considering resonance in the circuit resulted in higher average discharge energy per pulse. As a result, largest diameter of discharge was achieved under the sameC1. An observation of discharge location through a transparent electrode from the direction normal to the machining surface was conducted using a high-speed video camera. The results show that discharges within a pulse train duration are concentrated at the same location even if there is an interval between the discharges.