Voltage-regulating energy saving spark machining pulse power supply

Abstract

The present invention relates to machining technology, and is especially one voltage regulating energy saving spark machining pulse power supply. The pulse power supply includes rectification and filtering circuit, voltage regulating circuit, pulse converting and power amplifying circuit, voltage and current detecting circuit, pulse triggering circuit and PWM control circuit. The pulse power supply can provide no-load puncture voltage of about 100 V to the machining spark interval before puncture and machining maintenance voltage of about 25 V to the machining spark interval after puncture, and has the features of adaptive voltage regulation and equal current pulse width. The present invention can realize the independent regulation of pulse voltage, pulse width and pulse interval in wide ranges, and has no current limiting resistor with high power consumption and thus 2 times raised electric energy utilization rate.

Description

Technical field [0001] The invention relates to an electric spark machining pulse power supply in the field of mechanical machining. Background technique [0002] Pulse power supply is an important part of the EDM system, and its performance has a greater impact on the productivity, machining accuracy, surface processing quality, electrode loss and power utilization of EDM. [0003] The pulse power supply provides the energy required for EDM to remove materials and consumes more than 80% of the energy of the EDM machine tool. Since its generation, the EDM pulse power supply has experienced uncontrollable RC, RLC non-independent pulse power supplies, independent pulse power supplies with independent and isolated from each other for the discharge gap and DC power supply, and other derived on the basis of independent pulse power supplies. Pulse power supply, such as high and low voltage composite pulse power supply, multi-loop pulse power supply, equal pulse power supply, intelligen...

AI Technical Summary

Problems solved by technology

At present, most of the EDM pulse power supplies commonly used at home and abroad adopt the working method of connecting the current-limiting resistor in series with the discharge main circuit, and its power utilization rate is 25%, while nearly 75% of the power is consumed in the form of heat on the current-limiting resistor. While reducing the utilization rate of electric energy, it also puts forward higher requirements on the heat dissipation system of the pulse power supply and the working performance of electronic components.

In order to reduce the energy consumption of the EDM pulse power supply, domestic and foreign scientific and technological workers have carried out a lot of research work on the EDM energy-saving pulse power supply. Current limiting and energy storage greatly improve the power utilization rate of pulse power supply, but limit the adjustment range of pulse parameters

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