CN219113114U - Micro electric spark power supply for electric spark machining - Google Patents
Micro electric spark power supply for electric spark machining Download PDFInfo
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- CN219113114U CN219113114U CN202223438341.6U CN202223438341U CN219113114U CN 219113114 U CN219113114 U CN 219113114U CN 202223438341 U CN202223438341 U CN 202223438341U CN 219113114 U CN219113114 U CN 219113114U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application discloses a micro electric spark power supply for electric spark machining, which relates to the field of electric spark machining, wherein in the micro electric spark power supply, the positive electrode of a direct current power supply is sequentially connected with a current limiting resistor, a charging switch and a discharging switch and then is connected with a discharging electrode, the negative electrode of the direct current power supply is connected with a workpiece to be machined, one end of a discharging capacitor is connected with a common end of the charging switch and the discharging switch, and the other end of the discharging capacitor is connected with the negative electrode of the direct current power supply; the charge switch and the discharge switch are opposite in opening and closing states to form an interlocking structure, so that mutual isolation of capacitor charge and capacitor discharge is realized, direct discharge of a discharge electrode and a workpiece to be processed is completely avoided, direct discharge of the direct discharge power is avoided, energy acting on the discharge electrode can be reduced, and the method is suitable for an electric spark machining scene of taking a hard alloy electrode wire as the discharge electrode.
Description
Technical Field
The application relates to the field of electric spark machining, in particular to a micro electric spark power supply for electric spark machining.
Background
The spark machining is to connect the discharge electrode and the workpiece with the two poles of the micro spark pulse power supply, immerse the workpiece in the working solution, and utilize the electric corrosion phenomenon during the pulse spark discharge between the positive electrode and the negative electrode to remove redundant metal, so as to machine the size, shape and surface quality of the part to the preset requirements, which is an important machining process in the current manufacturing field.
In the prior art, tungsten wires, brass, red copper and the like are generally adopted as discharge electrodes for electric discharge machining, an RC combined discharge loop is generally adopted as a micro electric spark pulse power supply, the voltage design range of the discharge loop is 130V-180V, the resistance is 65 omega-90 omega, and the current is 2A.
However, with the increase of the engine emission requirement and the increase of the fuel spray nozzle demand of 0.1mm and below aperture, the progress requirement is difficult to be achieved by using common tungsten wires, brass, red copper and the like as discharge electrodes, while the hard alloy electrode wires have the advantages of good excircle consistency, good electrode rigidity, no bending and the like, and have obvious advantages when small holes of 0.1mm and below are processed, the processing precision requirement can be met, but the hard alloy electrode wires contain carbon elements, and the resistance value of the electrode wires is larger, so when the hard alloy electrode wires are directly replaced by the discharge electrodes, the heating reddening and even fusing of the hard alloy electrode wires are easily caused by the action of the larger discharge energy of the conventional micro electric spark pulse power supply on the discharge electrodes, and the reliability is influenced.
Disclosure of Invention
Aiming at the problems and the technical requirements, the applicant provides a micro electric spark power supply for electric spark machining, and the technical scheme of the application is as follows:
a micro electric spark power supply for electric spark machining comprises a direct current power supply, a current limiting resistor R, a charging switch Q1, a discharging switch Q2 and a discharging capacitor C1, wherein the positive electrode of the direct current power supply is sequentially connected with the current limiting resistor R, the charging switch Q1 and the discharging switch Q2 and then connected with a discharging electrode, and the negative electrode of the direct current power supply is connected with a workpiece to be machined;
the common end of the charging switch Q1 and the discharging switch Q2 is connected with one end of a discharging capacitor C1, and the other end of the discharging capacitor C1 is connected with the negative electrode of the direct current power supply;
the charge switch Q1 and the discharge switch Q2 are opened and closed in opposite states.
The micro electric spark power supply further comprises a processor, a first pulse circuit and a first inverter, wherein the processor is connected with and controls the output end of the first pulse circuit to be connected with the control end of the charging switch Q1 and the input end of the first inverter, and the output end of the first inverter is connected with the control end of the discharging switch Q2.
The further technical scheme is that the first pulse circuit outputs high level, the charging switch Q1 is closed, the discharging switch Q2 is opened, and the discharging capacitor C1 is charged by the direct current power supply;
or the first pulse circuit outputs a low level, the charging switch Q1 is opened, the discharging switch Q2 is closed, and the discharging capacitor C1 discharges to the discharging electrode and the workpiece to be processed through the discharging switch Q2.
The micro electric spark power supply further comprises a deionization switch Q3, wherein the public end of the discharging switch Q2 and the public end of the discharging electrode are connected with one end of the deionization switch Q3, and the other end of the deionization switch Q3 is connected with the negative electrode of the direct current power supply.
The micro electric spark power supply further comprises a second inverter, a first AND gate and a second pulse circuit, wherein the output end of the first inverter is further connected with the input end of the second inverter, the output end of the second inverter is connected with one input end of the first AND gate, the processor is further connected with and controls the second pulse circuit, the output end of the second pulse circuit is connected with the other input end of the first AND gate, and the output end of the first AND gate is connected with the control end of the deionization switch Q3.
When the first pulse circuit outputs a high level and the second pulse circuit outputs a high level, the charging switch Q1 is closed, the discharging switch Q2 is opened, the deionization switch Q3 is closed, the discharging capacitor C1 is charged by the direct current power supply, and the closed deionization switch Q3 eliminates ionization between the discharging electrode and a workpiece to be processed;
when the first pulse circuit outputs a high level and the second pulse circuit outputs a low level, the charging switch Q1 is closed, the discharging switch Q2 is opened, the deionizing switch Q3 is opened, and the discharging capacitor C1 is charged by the direct current power supply;
when the first pulse circuit outputs a low level, the charging switch Q1 is opened, the discharging switch Q2 is closed, the deionization switch Q3 is continuously opened, and the discharging capacitor C1 discharges to a discharging electrode and a workpiece to be processed through the discharging switch Q2.
The beneficial technical effects of this application are:
the application discloses a fine electric spark power supply for electric spark machining, this fine electric spark power supply is on RC return circuit's basis, realizes mutual isolation that electric capacity charges and electric capacity discharge through discharge switch and charge switch interlocking, has avoided direct discharge to discharge electrode and the work piece of waiting to process that direct current source participated in completely, has not the direct discharge of participated in of direct current source, just can reduce the energy that acts on discharge electrode, just can control the electric capacity energy below carbide heating state to can be applicable to carbide wire electrode as the electric spark machining scene of discharge electrode. And only the discharge capacitor discharges and no direct current power supply participates in the discharge, so that the control method is beneficial to realizing more accurate servo control when the control method is applied to the whole processing system.
The micro electric spark power supply also comprises a deionization switch, when the direct current power supply charges the discharge capacitor, ionization accumulated between the electrode and the workpiece can be eliminated through the deionization switch, so that the subsequent discharge rate can be improved, and the machining efficiency of electric spark machining is improved.
Drawings
Fig. 1 is a circuit diagram of a micro-spark power supply in one embodiment of the present application.
Fig. 2 is a circuit diagram of a micro-spark power supply in another embodiment of the present application.
Detailed Description
The following describes the embodiments of the present application further with reference to the accompanying drawings.
The application discloses a fine electric spark power supply for electric spark machining please refer to fig. 1, and fine electric spark power supply includes DC power supply U, current-limiting resistor R, charge switch Q1, discharge switch Q2 and discharge capacitor C1, and DC power supply U's positive pole connects gradually current-limiting resistor R, charge switch Q1, discharge switch Q2 back and connects discharge electrode 1, and DC power supply's negative pole is connected to wait to process work piece 2. The discharge electrode 1 and the workpiece 2 to be processed are placed according to the requirements of electric spark processing, and detailed description is omitted. The common end of the charging switch Q1 and the discharging switch Q2 is connected with one end of a discharging capacitor C1, and the other end of the discharging capacitor C1 is connected with the negative electrode of a direct current power supply U.
The charge switch Q1 and the discharge switch Q2 are opened and closed in opposite states. The micro electric spark power supply further comprises a processor, a first pulse circuit and a first inverter OR1, wherein the first pulse circuit outputs high-level OR low-level pulse, the processor is connected with and controls the output end of the first pulse circuit to be connected with the control end of the charging switch Q1 and the input end of the first inverter OR1, and the output end of the first inverter OR1 is connected with the control end of the discharging switch Q2. Based on this circuit, it can be ensured that the open and closed states of the charge switch Q1 and the discharge switch Q2 are always opposite.
The first pulse circuit outputs a high level, the charging switch Q1 is closed, the discharging switch Q2 is opened, and the discharging capacitor C1 is charged by the direct current power supply. Or the first pulse circuit outputs a low level, the charging switch Q1 is opened, the discharging switch Q2 is closed, and the discharging capacitor C1 discharges to the discharging electrode 1 and the workpiece 2 to be processed through the discharging switch Q2. Therefore, the direct discharge of the direct current power supply U to the discharge electrode 1 and the workpiece 2 to be processed is avoided, and the heating and fusing of the hard alloy electrode caused by the large discharge energy generated by the direct current power supply U are avoided, so that the micro electric spark power supply can be suitable for the discharge electrodes of common tungsten wires, brass, red copper and the like and can also be suitable for the hard alloy electrode.
In addition, as shown in fig. 2, the micro electric spark power supply further comprises a deionization switch Q3, wherein the common end of the discharge switch Q2 and the discharge electrode 1 is connected with one end of the deionization switch Q3, and the other end of the deionization switch Q3 is connected with the negative electrode of the direct current power supply. The micro electric spark power supply further comprises a second inverter OR2, a first AND gate AND1 AND a second pulse circuit, wherein the output end of the first inverter OR1 is further connected with the input end of the second inverter OR2, the output end of the second inverter OR2 is connected with one input end of the first AND gate AND1, the processor is further connected with AND controls the second pulse circuit, the output end of the second pulse circuit is connected with the other input end of the first AND gate AND1, AND the output end of the first AND gate AND1 is connected with the control end of the deionization switch Q3.
Based on the circuit diagram shown in fig. 2, the micro-spark power supply has a plurality of different operating states:
(1) When the first pulse circuit outputs a high level and the second pulse circuit outputs a high level, the charging switch Q1 is closed, the discharging switch Q2 is opened, the deionization switch Q3 is closed, the micro electric spark power supply works in a deionization state at the moment, the discharging capacitor C1 is charged by the direct current power supply U, and the ionization between the discharging electrode 1 and the workpiece 2 to be processed is eliminated by the closed deionization switch Q3.
(2) When the first pulse circuit outputs a high level and the second pulse circuit outputs a low level, the charging switch Q1 is closed, the discharging switch Q2 is opened, the deionization switch Q3 is opened, the micro electric spark power supply works in a deionization waiting state at the moment, and only the direct current power supply charges the discharging capacitor C1.
(3) When the first pulse circuit outputs a low level, no matter the second pulse circuit outputs a high level or a low level, the charging switch Q1 is opened, the discharging switch Q2 is closed, the deionization switch Q3 is continuously opened, the micro electric spark power supply works in a discharging state at the moment, and the discharging capacitor C1 discharges to the discharging electrode 1 and the workpiece 2 to be processed through the discharging switch Q2.
In practical application, a person skilled in the art can control each switch according to the logic, so that the micro electric spark power supply works in different working states, and the micro electric spark power supply generally works in a deionization state, a deionization waiting state and a discharging state in sequence, which belongs to the function that the person skilled in the art can configure to realize according to the actual needs.
What has been described above is only a preferred embodiment of the present application, which is not limited to the above examples. It is to be understood that other modifications and variations which may be directly derived or contemplated by those skilled in the art without departing from the spirit and concepts of the present application are to be considered as being included within the scope of the present application.
Claims (6)
1. The micro electric spark power supply for electric spark machining is characterized by comprising a direct current power supply, a current limiting resistor R, a charging switch Q1, a discharging switch Q2 and a discharging capacitor C1, wherein the positive electrode of the direct current power supply is sequentially connected with the current limiting resistor R, the charging switch Q1 and the discharging switch Q2 and then connected with a discharging electrode, and the negative electrode of the direct current power supply is connected with a workpiece to be machined;
the common end of the charging switch Q1 and the discharging switch Q2 is connected with one end of the discharging capacitor C1, and the other end of the discharging capacitor C1 is connected with the negative electrode of the direct current power supply;
wherein, the open/close states of the charge switch Q1 and the discharge switch Q2 are opposite.
2. The micro spark power supply according to claim 1, further comprising a processor, a first pulse circuit and a first inverter, wherein the processor is connected to and controls the output terminal of the first pulse circuit to be connected to the control terminal of the charge switch Q1 and the input terminal of the first inverter, and the output terminal of the first inverter is connected to the control terminal of the discharge switch Q2.
3. The micro electric spark power supply according to claim 2, wherein,
the first pulse circuit outputs a high level, the charging switch Q1 is closed, the discharging switch Q2 is opened, and the direct current power supply charges the discharging capacitor C1;
or the first pulse circuit outputs a low level, the charging switch Q1 is opened, the discharging switch Q2 is closed, and the discharging capacitor C1 discharges to the discharging electrode and the workpiece to be processed through the discharging switch Q2.
4. The micro spark power supply according to claim 2, further comprising a deionization switch Q3, wherein a common terminal of the discharging switch Q2 and the discharging electrode is connected to one terminal of the deionization switch Q3, and the other terminal of the deionization switch Q3 is connected to a negative electrode of the dc power supply.
5. The micro spark power supply of claim 4, further comprising a second inverter, a first and gate, and a second pulse circuit, wherein the output of the first inverter is further connected to the input of the second inverter, the output of the second inverter is connected to one input of the first and gate, the processor is further connected to and controls the second pulse circuit, the output of the second pulse circuit is connected to the other input of the first and gate, and the output of the first and gate is connected to the control terminal of the deionization switch Q3.
6. The micro electric spark power supply according to claim 5, wherein,
when the first pulse circuit outputs a high level and the second pulse circuit outputs a high level, the charging switch Q1 is closed, the discharging switch Q2 is opened, the deionization switch Q3 is closed, the direct-current power supply charges the discharging capacitor C1, and the closed deionization switch Q3 eliminates ionization between the discharging electrode and the workpiece to be processed;
when the first pulse circuit outputs a high level and the second pulse circuit outputs a low level, the charging switch Q1 is closed, the discharging switch Q2 is opened, the deionizing switch Q3 is opened, and the direct current power supply charges the discharging capacitor C1;
when the first pulse circuit outputs a low level, the charging switch Q1 is opened, the discharging switch Q2 is closed, the deionization switch Q3 is continuously opened, and the discharging capacitor C1 discharges to the discharging electrode and the workpiece to be processed through the discharging switch Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223438341.6U CN219113114U (en) | 2022-12-21 | 2022-12-21 | Micro electric spark power supply for electric spark machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223438341.6U CN219113114U (en) | 2022-12-21 | 2022-12-21 | Micro electric spark power supply for electric spark machining |
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| Publication Number | Publication Date |
|---|---|
| CN219113114U true CN219113114U (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223438341.6U Active CN219113114U (en) | 2022-12-21 | 2022-12-21 | Micro electric spark power supply for electric spark machining |
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| CN (1) | CN219113114U (en) |
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- 2022-12-21 CN CN202223438341.6U patent/CN219113114U/en active Active
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