CN203556972U - Discharge processing circuit - Google Patents
Discharge processing circuit Download PDFInfo
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- CN203556972U CN203556972U CN201320598102.9U CN201320598102U CN203556972U CN 203556972 U CN203556972 U CN 203556972U CN 201320598102 U CN201320598102 U CN 201320598102U CN 203556972 U CN203556972 U CN 203556972U
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Abstract
The utility model discloses a discharge processing circuit which comprises a direct current supply, a current-limiting resistor, a high speed switch, a copper electrode and an LC circuit, wherein the LC circuit comprises an inductor, a capacitor connected in series between one end of the inductor and the cathode of the direct current supply, and a diode, the capacitor is connected in parallel with the diode; the cathode of the diode is connected with the inductor, while the anode of the diode is connected with the cathode of the direct current supply; the cathode of the direct current supply is also connected with a super hard alloy workpiece to be processed; the anode of the direct current supply is sequentially connected in series with the current-limiting resistor, the high speed switch and the copper electrode; one end of the inductor is connected between the high speed switch and the copper electrode; the high speed switch is used for applying pulsed power supply voltage. Due to the adoption of the circuit, the copper electrode can be used for processing the super hard alloy under the condition that low power consumption is ensured.
Description
Technical field
The utility model relates to electric discharge manufacture field, relates in particular to a kind of copper electrode electric discharge processing circuit that is applicable to superhard alloy.
Background technology
The processing mode of general discharging processing machine to superhard alloy, is all to adopt copper tungsten as machined electrode, to control good processing loss, can not use copper electrode, and its fusing point is low, and loss is large, conventionally left at 70-80% through measuring its loss.But copper tungsten is expensive, and material is harder, and processing and milling is difficult for.
Summary of the invention
The purpose of this utility model is to provide a kind of electric discharge processing circuit, to use copper electrode to process superhard alloy in low-loss situation.
The utility model embodiment provides a kind of electric discharge processing circuit, and circuit comprises: dc source, current-limiting resistance, speed-sensitive switch, copper electrode and lc circuit;
Lc circuit comprises: inductance, be connected on electric capacity and diode between one end of inductance and the negative pole of dc source; Electric capacity and diodes in parallel, the negative electrode of diode is connected with inductance, and the anode of diode is connected with the negative pole of dc source;
The negative pole of dc source is connected with superhard alloy workpiece to be processed;
The positive pole of dc source is series limiting resistor, speed-sensitive switch and copper electrode successively; The other end of inductance is connected between speed-sensitive switch and copper electrode;
Speed-sensitive switch, for applying pulse power voltage.
Preferably, speed-sensitive switch is transistor.
Preferably, the loss of circuit is 20%.
The utility model embodiment also provides a kind of electric discharge processing circuit, comprising: dc source, current-limiting resistance, speed-sensitive switch, copper electrode, the first switch and lc circuit;
Lc circuit comprises: inductance, be connected on electric capacity and diode between one end of inductance and the negative pole of dc source; Electric capacity and diodes in parallel, the negative electrode of diode is connected with inductance, and the anode of diode is connected with the negative pole of dc source;
The negative pole of dc source is connected with workpiece to be processed;
The positive pole of dc source is series limiting resistor, speed-sensitive switch and copper electrode successively; The other end of inductance is connected between speed-sensitive switch and copper electrode by the first switch;
The first switch is for conducting when workpiece is superhard alloy;
The first switch for disconnecting when workpiece is common alloy;
Speed-sensitive switch, for applying pulse power voltage.
Preferably, speed-sensitive switch is transistor.
The utility model embodiment also provides a kind of electric discharge processing circuit, comprising: dc source, current-limiting resistance, speed-sensitive switch, electrode, second switch and lc circuit;
Lc circuit comprises: inductance, be connected on electric capacity and diode between one end of inductance and the negative pole of dc source; Electric capacity and diodes in parallel, the negative electrode of diode is connected with inductance, and the anode of diode is connected with the negative pole of dc source;
The negative pole of dc source is connected with superhard alloy workpiece to be processed;
The positive pole of dc source is series limiting resistor, speed-sensitive switch and electrode successively; The other end of inductance is connected between speed-sensitive switch and electrode;
Second switch and inductance in parallel;
Second switch, for disconnecting when electrode is copper electrode, conducting when electrode is copper-tungsten electrode;
Speed-sensitive switch, for applying pulse power voltage.
Preferably, speed-sensitive switch is transistor.
The utility model embodiment also provides a kind of electric discharge processing circuit, comprising: dc source, current-limiting resistance, speed-sensitive switch, electrode, the first switch, second switch and lc circuit;
Lc circuit comprises: inductance, be connected on electric capacity and diode between one end of inductance and the negative pole of dc source; Electric capacity and diodes in parallel, the negative electrode of diode is connected with inductance, and the anode of diode is connected with the negative pole of dc source;
The negative pole of dc source is connected with workpiece to be processed;
The positive pole of dc source is series limiting resistor, speed-sensitive switch and electrode successively; The other end of inductance is connected between speed-sensitive switch and electrode by the first switch;
Second switch and inductance in parallel;
The first switch, is the conducting while being superhard alloy of copper electrode and workpiece for electrode, and electrode is that copper electrode and workpiece disconnect while being common alloy;
Second switch for being that superhard alloy and electrode disconnect while being copper electrode at workpiece, is the conducting while being copper-tungsten electrode of superhard alloy and electrode at workpiece;
Speed-sensitive switch, for applying pulse power voltage.
Preferably, speed-sensitive switch is transistor.
The beneficial effects of the utility model are:
The utility model by increasing lc circuit in electric discharge processing circuit, utilize inductance slowly to discharge, electric current on copper electrode is slowly increased, changed the discharge current waveform of copper electrode, and the current value on its copper electrode is that inductive current adds and flows through transistorized electric current, therefore, be greater than the electric current that directly flows to copper electrode by transistor, thereby improved electric discharge working (machining) efficiency, reduced loss.
Accompanying drawing explanation
Fig. 1 is the electric discharge processing circuit structure chart in the utility model embodiment 1;
Fig. 2 is inductive current oscillogram in the utility model;
Fig. 3 is voltage across poles and electrode current oscillogram in the utility model;
Fig. 4 is the electric discharge processing circuit structure chart in the utility model embodiment 4;
Fig. 5 is the electric discharge processing circuit structure chart in the utility model embodiment 3;
Fig. 6 is the electric discharge processing circuit structure chart in the utility model embodiment 4.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
First the noun occurring in the utility model is made an explanation:
Superhard alloy: common are wolfram steel, titanium alloy etc.
Common alloy: such as common iron material, steel, various mould steel etc.
The utility model embodiment 1 provides a kind of electric discharge processing circuit.Referring to Fig. 1, this circuit comprises: dc source 11, current-limiting resistance 12, speed-sensitive switch 13, copper electrode 14 and lc circuit 15;
Lc circuit comprises: inductance 151, be connected on electric capacity 152 and diode 153 between one end of inductance and the negative pole of dc source; Electric capacity 152 is in parallel with diode 153, and the negative electrode of diode 153 is connected with inductance 151, and the anode 153 of diode is connected with the negative pole of dc source 11.
The negative pole of dc source 11 is connected with superhard alloy workpiece 16 to be processed.
The positive pole of dc source is series limiting resistor 12, speed-sensitive switch 13 and copper electrode 14 successively; The other end of inductance 151 is connected between speed-sensitive switch 13 and copper electrode 14.
Speed-sensitive switch 13 for applying pulse power voltage between copper electrode 14 and superhard alloy workpiece 16.
During concrete operations, first conducting speed-sensitive switch 13, make copper electrode 14 reach striking state.At inductance 151 and the two ends of electric capacity 152, there is a striking voltage.Now the voltage U 0 at power supply 11 two ends gives electric capacity 152 chargings by inductance 151, because the electric current I 2 of inductance 151 can not more become, the voltage U c of electric capacity 152 can not more become, so the electric current I 2 on inductance 151 slowly increases to negative sense, when capacitance voltage Uc size reaches U0, it is maximum that inductive current I2 also reaches thereupon, because inductive current I2 can not suddenly change, continue to electric capacity 152 chargings, the negative current I2 of inductance 151 reduces, until electric current becomes 0, now capacitance voltage reaches maximum Uc>U0.When speed-sensitive switch conducting, interelectrode voltage U 1 is because inductance 151 and electric capacity 512 affect, and voltage waveform presents inverted U to be changed.
The variation of inductive current I2 and inter-electrode voltage as shown in Figure 2.
When copper electrode 14 slowly arrives certain distance near workpiece 16, its by striking status transition to discharge condition, now the voltage U c at lc circuit two ends is much larger than the discharge voltage U1 between electrode, electric capacity 152 discharges by inductance 151, discharge process is: beginning electric current is I2=0, I3=I1=(U0-U1)/R, R is the value of current-limiting resistance 12 herein, I3 is interelectrode electric current.Capacitance voltage is Uc, inductive current I2 can not suddenly change, capacitance voltage can not suddenly change, carrying out along with electric discharge, inductive current I2 increases, electric capacity electric weight reduces, voltage drop, when capacitance voltage is reduced between electrode discharge voltage U1, it is maximum that inductive current I2 reaches, interelectrode electric current I 3 is the stack I3=I2+I1 of inductive current I2 and resistive layer electric current I 1, inductive current I2 starts to reduce subsequently, continuation is to capacitor discharge, until inductive current I2 becomes 0, because also there is diode at electric capacity two ends, so the voltage at electric capacity two ends is minimum, be designated as the forward conduction voltage of diode for-Ud(Ud), in discharge process, when inductive current I2 is 0, have-Ud
uc
u1, then U1 gives electric capacity 152 chargings by inductance 151 again, and electric current is negative.Fig. 3 shows the waveform of electrode current I3 in said process and voltage across poles U1.
After having discharged, speed-sensitive switch disconnects, and copper electrode 14 enters dormant state.It should be noted that, the periodic conducting of speed-sensitive switch 13, disconnection, so that pulse power voltage to be provided, its cycle can be set according to specific needs.
What above-mentioned speed-sensitive switch was concrete can be transistor.
Through measuring, the loss of above-mentioned electric discharge processing circuit when processing superhard alloy can be controlled at 20% left and right.
Visible, the utility model, by increasing lc circuit and diode, slowly increases the electric current between copper electrode, the high loss of having avoided electric current moment increase to bring, electric current between copper electrode is greater than and directly passes through transistorized electric current, therefore, has improved electric discharge working (machining) efficiency.
The utility model embodiment 2 provides a kind of electric discharge processing circuit.As shown in Figure 3, this circuit comprises: dc source 21, current-limiting resistance 22, speed-sensitive switch 23, copper electrode 24, the first switch 27 and lc circuit 25;
The negative pole of dc source 21 is connected with workpiece to be processed 26.
The positive pole of dc source 21 is series limiting resistor 22, speed-sensitive switch 23 and copper electrode 24 successively; The other end of inductance 251 is connected between speed-sensitive switch 23 and copper electrode 24 by the first switch 27.
Above-mentioned electric discharge processing circuit can be used for the electric discharge processing of superhard alloy or common alloy.
Concrete, when workpiece to be processed 26 is superhard alloy, by the first switch 27 conductings.The course of work of electric discharge processing circuit as described in example 1 above.
When workpiece to be processed 26 is common alloy, the first switch 27 is disconnected.
Wherein, speed-sensitive switch 23 is for providing pulse power voltage.This speed-sensitive switch is specifically as follows transistor.
By above-mentioned electric discharge processing circuit, can be according to the difference of workpiece to be processed, conducting or disconnect the first switch, with by lc circuit for or be not used in processing work.
The utility model embodiment 3 also provides a kind of electric discharge processing circuit.As shown in Figure 4, this circuit comprises: dc source 31, current-limiting resistance 32, speed-sensitive switch 33, electrode 34, second switch 37 and lc circuit 35.
Lc circuit 35 comprises: inductance 351, be connected on electric capacity 352 and diode 353 between one end of inductance and the negative pole of dc source.Electric capacity 352 is in parallel with diode 353, and the negative electrode of diode 353 is connected with inductance 351, and the anode of diode 353 is connected with the negative pole of dc source 31.
The negative pole of dc source 31 is connected with superhard alloy workpiece 36 to be processed.
The positive pole of dc source 31 is series limiting resistor 32, speed-sensitive switch 33 and electrode 34 successively.The other end of inductance 351 is connected between speed-sensitive switch 33 and electrode 34.Second switch 37 is in parallel with inductance 351.
While applying above-mentioned electric discharge processing circuit processing superhard alloy workpiece, both can adopt copper electrode also can adopt copper tungsten motor.
When adopting copper electrode, second switch 37 needs to disconnect, and lc circuit integral body is added in electric discharge processing circuit, its operation principle as described in example 1 above.When adopting copper-tungsten electrode, conducting second switch 37, is now noninductive pure capacitor charge and discharge circuit machining state, and the control mode of instantaneous large-current and short pulse duration is directly provided.Electrode current I3=I2+I1, voltage waveform also changes, and can be applied to the superalloy electric discharge processing of different hardness materials.
The utility model embodiment 4 also provides a kind of electric discharge processing circuit, and referring to Fig. 5, this circuit comprises: dc source 41, current-limiting resistance 42, speed-sensitive switch 43, electrode 44, the first switch 471, second switch 472 and lc circuit 45.
Lc circuit 45 comprises: the electric capacity 452 between the negative pole of inductance 451, the one end that is connected on inductance 451 and dc source 41 and diode 453.Electric capacity 451 is in parallel with diode 453, and the negative electrode of diode 453 is connected with inductance 451, and the anode of diode 453 is connected with the negative pole of dc source 41.
The negative pole of dc source 41 is connected with workpiece to be processed 46.
The positive pole of dc source 41 is series limiting resistor 42, speed-sensitive switch 43 and electrode 44 successively.The other end of inductance 451 is connected between speed-sensitive switch 43 and electrode 44 by the first switch 471.
Second switch 472 is in parallel with inductance 451.
When adopting the workpiece of copper electrode processing superhard alloy, need conducting the first switch 471, now second switch 472 disconnects.When adopting copper electrode to process common alloy, need to disconnect the first switch 471.
When adopting the workpiece of copper-tungsten electrode processing superhard alloy, need conducting the first switch 471 and second switch 472.
Above specific embodiment, the purpose of this utility model, technical scheme and beneficial effect are further described, institute it should be noted, these are only a specific embodiment of the present utility model, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (8)
1. an electric discharge processing circuit, is characterized in that, described circuit comprises: dc source, current-limiting resistance, speed-sensitive switch, copper electrode and lc circuit;
Described lc circuit comprises: inductance, be connected on electric capacity and diode between one end of described inductance and the negative pole of described dc source; Described electric capacity and described diodes in parallel, the negative electrode of described diode is connected with described inductance, and the anode of described diode is connected with the negative pole of described dc source;
The negative pole of described dc source is connected with superhard alloy workpiece to be processed;
The positive pole of described dc source connect successively described current-limiting resistance, described speed-sensitive switch and described copper electrode; The other end of described inductance is connected between described speed-sensitive switch and described copper electrode;
Described speed-sensitive switch is used for applying pulse power voltage.
2. electric discharge processing circuit as claimed in claim 1, is characterized in that, described speed-sensitive switch is transistor.
3. an electric discharge processing circuit, is characterized in that, described circuit comprises: dc source, current-limiting resistance, speed-sensitive switch, copper electrode, the first switch and lc circuit;
Described lc circuit comprises: inductance, be connected on electric capacity and diode between one end of described inductance and the negative pole of described dc source; Described electric capacity and described diodes in parallel, the negative electrode of described diode is connected with described inductance, and the anode of described diode is connected with the negative pole of described dc source;
The negative pole of described dc source is connected with workpiece to be processed;
The positive pole of described dc source connect successively described current-limiting resistance, described speed-sensitive switch and described copper electrode; The other end of described inductance is connected between described speed-sensitive switch and described copper electrode by described the first switch;
Described the first switch is for conducting when described workpiece is superhard alloy;
Described the first switch for disconnecting when described workpiece is common alloy;
Described speed-sensitive switch, for applying pulse power voltage.
4. electric discharge processing circuit as claimed in claim 3, is characterized in that, described speed-sensitive switch is transistor.
5. an electric discharge processing circuit, is characterized in that, described circuit comprises: dc source, current-limiting resistance, speed-sensitive switch, electrode, second switch and lc circuit;
Described lc circuit comprises: inductance, be connected on electric capacity and diode between one end of described inductance and the negative pole of described dc source; Described electric capacity and described diodes in parallel, the negative electrode of described diode is connected with described inductance, and the anode of described diode is connected with the negative pole of described dc source;
The negative pole of described dc source is connected with superhard alloy workpiece to be processed;
The positive pole of described dc source connect successively described current-limiting resistance, described speed-sensitive switch and described electrode; The other end of described inductance is connected between described speed-sensitive switch and described electrode;
Described second switch and described inductance in parallel;
Described second switch, for disconnecting when described electrode is copper electrode, conducting when described electrode is copper-tungsten electrode;
Described speed-sensitive switch, for applying pulse power voltage.
6. electric discharge processing circuit as claimed in claim 5, is characterized in that, described speed-sensitive switch is transistor.
7. an electric discharge processing circuit, is characterized in that, described circuit comprises: dc source, current-limiting resistance, speed-sensitive switch, electrode, the first switch, second switch and lc circuit;
Described lc circuit comprises: inductance, be connected on electric capacity and diode between one end of described inductance and the negative pole of described dc source; Described electric capacity and described diodes in parallel, the negative electrode of described diode is connected with described inductance, and the anode of described diode is connected with the negative pole of described dc source;
The negative pole of described dc source is connected with workpiece to be processed;
The positive pole of described dc source connect successively described current-limiting resistance, described speed-sensitive switch and described electrode; The other end of described inductance is connected between described speed-sensitive switch and described electrode by described the first switch;
Described second switch and described inductance in parallel;
Described the first switch, is the conducting while being superhard alloy of copper electrode and described workpiece for described electrode, and described electrode is that copper electrode and described workpiece disconnect while being common alloy;
Described second switch for being that superhard alloy and described electrode disconnect while being copper electrode at described workpiece, is the conducting while being copper-tungsten electrode of superhard alloy and described electrode at described workpiece;
Described speed-sensitive switch, for applying pulse power voltage.
8. electric discharge processing circuit as claimed in claim 7, is characterized in that, described speed-sensitive switch is transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598102.9U CN203556972U (en) | 2013-09-26 | 2013-09-26 | Discharge processing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598102.9U CN203556972U (en) | 2013-09-26 | 2013-09-26 | Discharge processing circuit |
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| CN203556972U true CN203556972U (en) | 2014-04-23 |
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| CN201320598102.9U Withdrawn - After Issue CN203556972U (en) | 2013-09-26 | 2013-09-26 | Discharge processing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464844A (en) * | 2013-09-26 | 2013-12-25 | 苏州群伦精密机电工业有限公司 | Discharge processing circuit |
-
2013
- 2013-09-26 CN CN201320598102.9U patent/CN203556972U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464844A (en) * | 2013-09-26 | 2013-12-25 | 苏州群伦精密机电工业有限公司 | Discharge processing circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140423 Effective date of abandoning: 20150729 |
|
| RGAV | Abandon patent right to avoid regrant |