Mitsubishi Denki Kabushiki Kaisha

Other

Mitsubishi Electric Engineering Company, Limited

Koji Akamatsu

Akihiro Goto

Satoshi Suzuki

Atsushi Taneda

Hajime Ogawa

Naotake Mouri

An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.

Electrical discharge state detecting device for electrical discharge machining machine

A power supply unit for a discharge machining apparatus which eliminates overshooting in current rise and improves the electrode consumption characteristics by preventing an operational amplifier as well as a current control element from being saturated, thereby eliminating overshooting during the rise time of the machining current, by clamping the output voltage of the operational amplifier during the stand-by time for electric discharge. The output is clamped by a plurality of resistors and diodes to a state where the output voltage is higher than a power-supply voltage (the output clamp level is set by a resistor). Namely, during the stand-by time when inverted amplification (feedback) via a resistor in an operational amplifier is being carried out, a constant state of feedback is maintained by the diodes.

Power supply unit for discharge apparatus which prevents excessive

Electrical discharge machining level detector

The invention permits determination of the position and/or the configuration of an object by impinging a laser light beam onto the object in a light scattering medium, and detecting the trace of a scattered light beam, by cameras.

Method and apparatus for determining the position and the configuration

Growing community of inventors

Tokyo, Japan

Koji Akamatsu