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Electrospark wire-electrode cutting process discharge condition detecting device

A technology of discharge state and cutting processing, applied in measuring devices, measuring current/voltage, measuring electrical variables, etc., can solve problems such as deteriorating processing effects

Inactive Publication Date: 2008-09-10
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This average gap voltage contains many uncertain factors, so it will deteriorate the processing effect

Method used

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  • Electrospark wire-electrode cutting process discharge condition detecting device
  • Electrospark wire-electrode cutting process discharge condition detecting device
  • Electrospark wire-electrode cutting process discharge condition detecting device

Examples

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] The invention relates to a discharge state detection device for wire electric discharge machining, which includes a voltage dividing circuit, a comparison circuit, a signal drive circuit, a floating voltage-stabilizing power supply circuit, and a current sensor. The current sensor is used to detect the gap current between the electrode (electrode wire or copper tube electrode) and the workpiece, and output the voltage Vout and reference voltage Vref corresponding to the measured current value to the voltage divider circuit.

[0019] The voltage divider circuit is used to detect the gap voltage between the electrode and the workpiece, and the gap voltage is processed by the voltage divider filter in the voltage divider circuit to output the divided voltage value Fz of the gap voltage to the comparison circuit.

[0020] The comparison circuit performs ar...

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PUM

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Abstract

The invention discloses an electrical discharge wire cutting machining discharge state detection device, which comprises a current sensor, a voltage division circuit, a comparison circuit, a signal driving circuit and a floating voltage stabilizing power supply circuit; the detection device controls the three discharge states of no-load, spark and short-circuit during the processing process by the on-line real-time sampling of the duty ratio of the gap voltage waveform and the on-line real-time adjustment of the output voltage of an adjustable voltage stabilizing power supply; the floating on-line real-time detection is carried out by the respective lasting times of the no-load, the spark and the short-circuit in the single pulse width and the relative time utilization ratio, which can effectively solve the problem that the gap voltage is fluctuated along with the gap current and further improve the detection precision and the sensitivity of the discharge states of the no-load, the spark and the short-circuit.

Description

technical field [0001] The invention relates to a processing discharge state detection device suitable for a numerically controlled electric discharge wire cutting machine tool. Background technique [0002] The three discharge states of no-load, spark, and short circuit in CNC WEDM and the utilization rate of spark discharge pulses reflect the quality of the discharge state between the tool electrode and the workpiece during EDM, as well as the cutting speed and processing productivity. and an important indicator of cutting stability. [0003] The current CNC wire cutting machine generally only detects the average voltage of the discharge gap, and uses it to determine the size of the feed speed. Because the average gap voltage of the machining gap is composed of the average of three voltages ranging from open circuit voltage (80V), spark maintenance voltage (about 25V) and short circuit voltage (2 to 10V), it is not a single exact value. This average gap voltage contains ...

Claims

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Application Information

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IPC IPC(8): B23H7/04G01R19/00
Inventor 白基成郭永丰李立青黄河邓冠群李朝将李诗李冬庆
Owner HARBIN INST OF TECH
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