Multi-station wire electric discharge cutting time-sharing pulse power supply synchronous processing method

Abstract

A multi-station wire electric discharge cutting time-sharing pulse power supply synchronous processing method is disclosed. The number of wire cutting stations of multi-station wire electric dischargecutting equipment is N. The method comprises the following steps: designing the power supply to be a pulse power supply having one path of input and N paths of output, the duty ratio of the N paths of output pulses is less than 1 / N, and the high levels of the N paths of output pulses are staggered mutually; the positive electrodes of the N paths of output pulses are respectively electrically connected with workpieces fixed on the N stations, and the negative electrodes of the N paths of output pulses are electrically connected with electrode wires of the wire cutting; and starting the electrode wires for wire cutting the workpieces. According to the method, the high levels of the N paths of output pulses are staggered mutually, different paths of output pulses are complemented with each other, but dead time is reserved, so that the interference of induced current generated by the electrode wires in series connection is avoided, the pulse time of the pulse power supply is utilized, theconsistency and accuracy of machining are ensured, and the efficiency and machining quality are improved.

Description

technical field [0001] The invention relates to the technical field of wire cutting, in particular to a multi-station wire electric discharge cutting time-sharing pulse power synchronous processing method. Background technique [0002] Electrolytic EDM is a special processing technology. It uses high-voltage pulse power supply and low-voltage DC power supply for composite processing. The high-voltage pulse is conducive to the generation of spark discharge after the breakdown of the working fluid in the inter-electrode gap, and removes the difficult-to-process parts of electrolytic machining. Allows electrolytic machining to continue. However, the existing pulse power supply is one pulse output, and pulse discharge machining is performed on multiple workpieces at multiple stations at the same time, but the induction currents will interfere with each other between different stations processed by the same pulse at the same time, which seriously affects the processing. consiste...

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Problems solved by technology

[0003] The patent No. 108380988A provides a wire electric discharge pulse power supply and its control method. In the power circuit, the energy storage inductor is used instead of the current limiting resistor, and the three-way interleaved parallel Buck circuit structure is adopted to improve the processing efficiency and switching frequency, reduce the However, since the pulse power supply is only realized for a single station, if it is used to process multiple stations, it cannot guarantee that the discharge energy of each station is consistent, resulting in low processing efficiency

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