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Cyclic superimposed chopper energy-saving pulse power source for spark machining

A pulse power supply and electric spark technology, applied in electric processing equipment, metal processing equipment, circuits, etc., can solve the problems of energy-saving pulse power supply pulse electric parameter adjustment range limitation and other issues

Inactive Publication Date: 2007-07-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of inductive elements, the adjustment range of pulse electrical parameters of these forms of energy-saving pulse power supplies is limited.

Method used

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  • Cyclic superimposed chopper energy-saving pulse power source for spark machining
  • Cyclic superimposed chopper energy-saving pulse power source for spark machining
  • Cyclic superimposed chopper energy-saving pulse power source for spark machining

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specific Embodiment approach 1

[0005] Specific Embodiment 1: The present embodiment will be specifically described below with reference to FIG. 1 to FIG. 3 . It consists of a DC power supply 2, a main vibration circuit 3, a drive circuit 1, and several power switch tubes (T 1 ~T n ) and the processing electrode 4-1 of electric discharge machining and the workpiece 4-2 are composed, and the positive output terminal of the DC power supply 2 is connected to the power switch tube (T 1 ~T n ) on the collector, the power switch tube (T 1 ~T n ) is connected to the processing electrode 4-1, the workpiece 4-2 is connected to the negative output terminal of the DC power supply 2, the output terminal of the main vibration circuit 3 that generates the pulse signal is connected to the input terminal of the drive circuit 1, and some of the drive circuit 1 The output ports respectively output the pulse signal S 1 , S 2 …S n , pulse signal S 1 , S 2 …S n respectively applied to the power switch tube T 1 , T 2 ...

specific Embodiment approach 2

[0006] Specific Embodiment 2: The present embodiment will be specifically described below with reference to FIG. 2 to FIG. 7 . This embodiment also includes a current detection circuit 5, the current detection circuit 5 is connected in series between the workpiece 4-2 and the DC power supply 2 to extract the current signal, the main vibration circuit 3 is composed of a single-chip microcomputer 3-1 and a programmable logic device 3-2, The output end of the current detection circuit 5 is connected to the input end of the single-chip microcomputer 3-1 of the main vibration circuit 3, the output end of the single-chip microcomputer 3-1 is connected to the input end of the programmable logic device 3-2, and the output end of the programmable logic device 3-2 Connect to the input terminal of drive circuit 1. The single-chip microcomputer 3-1 is used to analyze the preset parameters in the single-chip microcomputer 3-1 and the current signal detected by the current detection circuit...

specific Embodiment approach 3

[0007] Specific Embodiment Three: The present embodiment will be specifically described below in conjunction with FIG. 3 to FIG. 6 . The difference between this embodiment and Embodiment 1 is that for the power switch tube (T 1 ~T n ) when performing drive chopping, the last power switch tube T in one drive cycle n The set delay time t after the drive signal arrives dAfter that, the power switch tube T 1 The drive signal arrives to start the next drive cycle. Other components and connections are the same as those in Embodiment 1. Such arrangement saves the number of power switch tubes.

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Abstract

A cyclically overlapped chopping-type pulse power supply for energy-saving electrospark machining is composed of DC power supply, master oscillator circuit, several power switching transistors, electrospark electrode and workpiece to be machined.

Description

Technical field: [0001] The invention relates to a pulse power supply for electrical discharge machining in the field of machining. Background technique: [0002] At present, the pulse power supply used in EDM can be divided into traditional pulse power supply without energy-saving technology and energy-saving pulse power supply with energy-saving technology. The traditional pulse power supply mostly uses the power switch tube to be turned on and off according to the set pulse width and pulse interval, and the pulse voltage is added to the discharge gap between the processing electrode 4-1 and the workpiece 4-2, as shown in Figure 8. To prevent the power switch tube T 1 ,T 2 ,...T n After it is fully turned on, the current flowing through it is too large to burn it out, and the resistor R is used to 1 , R 2 ,...R n To limit the growth of the current, the adjustment of the processing current is realized by connecting different numbers of "resistance-power" switch tube b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/02B23H7/14
Inventor 狄士春迟关心韦东波
Owner HARBIN INST OF TECH
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