Voltage detection method between non-contact poles for electrostatic induction micro electro discharge machining and circuit design thereof

Abstract

The invention provides a voltage detection method between non-contact poles for electrostatic induction micro electro discharge machining and a circuit design thereof. By using the electrostatic induction principle, a metal ring is sleeved on a rotating main shaft (or a tool electrode) and is arranged opposite to the tool electrode in a non-contact mode. The metal ring is used as a non-contact voltage measurement probe. A capacitor formed between the probe and the tool electrode is serially connected with a matching capacitor connected in a detection loop; the two capacitors in serial connection are connected in parallel with the poles; and the voltage distributed on the matching capacitor is in a direct proportion to the voltage between the poles. The voltage on the matching capacitor is measured by adopting the capacitive voltage dividing type inter-polar voltage detection loop, so the aim of measuring the voltage between the poles can be fulfilled.

Description

technical field [0001] The invention relates to servo control of micro electric discharge machining, solves the problem of non-contact inter-electrode voltage detection of electrostatic induction micro electric discharge machining, and specifically relates to a non-contact inter-electrode voltage detection method of electrostatic induction micro electric discharge machining and its circuit design. technical background [0002] The proposal of this patent comes from the National Natural Science Foundation of China project "Research on New Method of Micro-EDM Based on Electrostatic Induction" (50775056). In micro-EDM, the commonly used power supply is RC pulse power supply. Yang Xiaodong of Harbin Institute of Technology and Kunie Masanoshi of Tokyo University of Agriculture and Technology proposed a new method of micro-EDM based on electrostatic induction. The micro electric discharge machining method based on the principle of electrostatic induction adopts a completely diffe...

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Problems solved by technology

[0006] However, the non-contact power supply method is adopted in the electrostatic induction micro-EDM method, and the detection line cannot be directly connected to the high-speed rotating spindle. Therefore, this patent application proposes a non-contact inter-electrode voltage based on the principle of capacitive voltage division The detection method solves the problem of measuring the inter-electrode voltage between the high-speed rotating spindle and the workpiece under the electrostatic induction feeding mode

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