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Power supply control apparatus for discharging processor

A technology of power control device and electric discharge machine, which is applied in electric machining equipment, metal machining equipment, circuits, etc., can solve the problems of discharge detection output drop, etc., and achieve the effect of accurate control, accurate discharge pulse and intermittent time

Active Publication Date: 2008-10-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the discharge ends, the discharge detection output of the discharge detection device 23 drops

Method used

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  • Power supply control apparatus for discharging processor
  • Power supply control apparatus for discharging processor
  • Power supply control apparatus for discharging processor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0056] 1 is a schematic circuit diagram of main parts of a power supply control device for an electrical discharge machine according to Embodiment 1 of the present invention. In the drawing, a pulse-shaped discharge voltage is supplied to the machining gap between the electrode 2 and the workpiece 3 of the electric discharge machine. The high-pass filter 4 extracts high-frequency components of the discharge voltage. The rectification device 5 rectifies the high-frequency components extracted by the high-pass filter 4 to output an output signal Vrec. The discharge voltage detection device 75 detects the discharge voltage in the machining gap between the electrode 2 and the workpiece 3 . The discharge current detection device 76 detects the discharge current in the machining gap between the electrode 2 and the workpiece 3 .

[0057] The output signal u of the discharge voltage detection device 75 and the output signal i of the discharge current detection device 76 are input to...

Embodiment approach 2

[0072] Figure 5 It is a functional block diagram showing main parts of the power supply control device of the electric discharge machine according to Embodiment 2 of the present invention, and a part thereof is drawn as a circuit diagram. exist Figure 5 In , the machining gap is formed by the electrode 2 and the workpiece 3 . A pulse-shaped discharge voltage is supplied from the machining power source 1 to the machining gap. The high-pass filter 4 detects high-frequency components of the discharge voltage. The rectification device 5 rectifies the high-frequency components from the high-pass filter 4 . The rectified output signal is output from the rectifying device 5 . The discharge detection device 23 detects a discharge voltage and a discharge current in a machining gap between the electrode 2 and the workpiece 3 . Using the output of the discharge detection device 23, the integrating circuit 9 is reset, and the timer 24 is started. A short-circuit detection device 2...

Embodiment approach 3

[0088] Figure 9It is a functional block diagram showing main parts of the power supply control device of the electric discharge machine according to Embodiment 3 of the present invention, and a part thereof is drawn as a circuit diagram. for with Figure 5 The same or corresponding parts of the electric discharge machine power supply control device according to the second embodiment shown are given the same reference numerals, and description thereof will be omitted. In the power control device of this embodiment, in Figure 5 In addition to the power supply control device according to Embodiment 2 shown, a pulse cutoff rate calculation means (pulse cutoff rate calculation means) 50 is provided.

[0089] The average pause time calculation means (average pause time calculation means) 45 obtains the average value of the discharge pulse pause times which are controlled by the pulse control means (pulse control means) 43 . The pulse cut-off rate calculation means (pulse cut-of...

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Abstract

A power supply control unit of an electric discharge machine comprising a means (high-pass filter (4), rectifier (5) and an integration circuit (9)) for detecting the high frequency components of a voltage in the machining gap, a detector (40) for detecting the machining voltage level in the machining gap, a high frequency component comparator (78) for comparing the detected high frequency component with a reference value, a voltage level comparator (41) for comparing the detected voltage level with a reference value, and a pulse controller (43) for controlling the idle time based on the comparison results from the high frequency component comparator and interrupting the discharge pulse based on the comparison results from the voltage level comparator.

Description

technical field [0001] The present invention relates to a power source control device for controlling a discharge pulse supplied to a sculpted electric discharge machine that performs pulse discharge in a machining gap formed by placing a machining electrode in opposition to a workpiece, Process the processed product. Background technique [0002] In the engraving electric discharge machine that processes the workpiece by performing pulse discharge in the machining gap formed by making the machining electrode and the workpiece face each other, it is known that the high-frequency component of the discharge voltage can be detected and its magnitude can be judged. Identify the discharge state during electrical discharge machining. As a technique for recognizing a discharge state from this high-frequency component, for example, a technique disclosed in Patent Document 1 is known. [0003] FIG. 13 is a circuit diagram that is essentially the same as the main part configuration ...

Claims

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Application Information

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IPC IPC(8): B23H1/02
CPCB23H1/022B23H1/024
Inventor 鹈饲洋史森田一成佐佐木史朗
Owner MITSUBISHI ELECTRIC CORP
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