CN1028848C - Pulse power supply for electric spark machine of conducting ceramic material - Google Patents
Pulse power supply for electric spark machine of conducting ceramic material Download PDFInfo
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- CN1028848C CN1028848C CN 90109392 CN90109392A CN1028848C CN 1028848 C CN1028848 C CN 1028848C CN 90109392 CN90109392 CN 90109392 CN 90109392 A CN90109392 A CN 90109392A CN 1028848 C CN1028848 C CN 1028848C
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Abstract
The present invention relates to a pulse power source used for the electric spark machining of conductive ceramic materials, which belongs to the field of superhard material machining. Aiming at the characteristics of ultra hardness, wear resistance, high resistivity and difficult machining of conductive ceramic materials, the present invention adopts an LC-R discharge explosion force improving circuit and utilizes electric-force effect of electric spark machining to rapidly machine the conductive ceramic materials. The pulse power source is suitable for the electric spark forming machining, and is suitable for the electric spark cutting machining.
Description
The present invention relates to a kind of pulse power of conducting ceramic material spark machined.The manufacture field that belongs to superhard material.
Conducting ceramic material have hardness height, wearability good, also have fusing point height, characteristics that resistivity is high simultaneously, so its machining, spark machined all have suitable difficulty.Countries in the world are all at this materials processing technology of research and equipment at present.Beijing Electrical Processing Inst. invented " polycrystalline diamond instrument spark erosion technique " in 1984, obtained the 13rd international invention in national invention second prize and Geneva and new technology exhibition silver medal.This technology adopts mainly that transistor pulse generator is additional to increase quick-fried circuit, utilizes the electricity-stress effect processing polycrystalline diamond in the spark machined, has obtained breakthrough.But this technology remains in following shortcoming:
1, the energy that increases quick-fried circuit of this transistor pulse generator is taken from discharging gap, therefore needs the pulse power to export higher voltage (being higher than 300V) to discharging gap, and unloaded partially processing, has increased the electrical equipment cost and has influenced working (machining) efficiency.
2, this technology is applicable to the Electric Discharge Machining of kerosene working solution medium, and relatively poor to the line cutting processing effect that adopts emulsifiable solution medium.
In August, 1988 laid-open U.S. Patents (NO.4766281) also is a kind of electric machining pulse power, and this document discloses dc source, and inductance and electric capacity play the charging effect, and the technical scheme to the switching device of discharge control is also arranged.
The switching device to discharge control of this technical scheme is that main element is formed by transistor.
Exist: the shortcoming that pulse frequency is lower, influence the processing technology index.
The purpose of this invention is to provide a kind of pulse power that is used for the conducting ceramic material spark machined, to solve the deficiencies in the prior art.
Design of the present invention is: at the common pulse power, its send the pulse spacing during in, a dc source that increases in the quick-fried circuit, by inductance the electric capacity oscillation boosting is charged, stored charge on electric capacity, and when the discharge pulse that the above-mentioned pulse power sends, this increases quick-fried circuit and controlled by an on-off circuit, electric charge on the above-mentioned electric capacity can be released in the electro discharge machining gapping place apace, discharge pulse energy superposition with the pulse power sends has increased the discharge energy to electro discharge machining gapping place.
Accompanying drawing is circuit theory diagrams of the present invention.
The present invention is achieved in that as shown in the figure, the present invention includes master-oscillator element circuit 1, preamplifier state element circuit 2, and power-amplifier stage element circuit 3, electronic switching circuit 4 increases quick-fried circuit 5, dc source 6, current-limiting circuit 7. After one tunnel pulse output of said master-oscillator element circuit 1 connects preamplifier state element circuit 2, be connected with power-amplifier stage element circuit 3, one group of output of said dc source 6 is connected with power-amplifier stage element circuit 3 through current-limiting circuit 7, and forms the loop with electro discharge machining gapping place 8. Increase quick-fried circuit 5 and be made up of a charge circuit and a discharge loop, charge circuit is by dc source 6, diode D, inductance L, and capacitor C forms. Discharge loop is by capacitor C, resistance R1With electronic switching circuit 4, electro discharge machining gapping place 8 forms.
Another road output control electronic switching circuit 7 of master-oscillator element circuit 1.
MOS power amplifier in the electronic switching circuit also can be connect one tunnel output of master-oscillator element circuit 1 by the controlled stage of an IGCT replacement, IGCT by resistance 2.The positive level connecting resistance R of IGCT
1, its negative level connects electro discharge machining gapping place 8.
Operation principle of the present invention is described below: pulse power master-oscillator element circuit 1 wherein, preamplifier state element circuit 2, power-amplifier stage element circuit 3, the structure of current-limiting circuit 7 connects, be that those skilled in the art are known, here do not given unnecessary details.When connecting dc source 6, increase in the quick-fried circuit 5, one group of output of DC current 6 by diode D, inductance L to capacitor C charge, charging voltage can reach 2 times of supply voltages.When the road rectangular pulse that sends when master-oscillator element circuit 1 was opened electronic switching circuit 4, energy stored was passed through resistance R in the capacitor C
1And electronic switching circuit is to discharging gap 8 discharges.Meanwhile, another road pulse that master-oscillator element circuit 1 sends, by preamplifier state element circuit 2, power-amplifier stage element circuit 3 provides discharge energy to electro discharge machining gapping place 8.During the pulse spacing that master-oscillator element circuit 1 sends, power-amplifier stage element circuit 3 and electronic switching circuit 4 are in closed condition, and one group of output of the dc source 6 that this moment is above-mentioned is by diode D, and inductance L repeats said process to capacitor C vibration charging.The energy that increases on the capacitor C in the quick-fried circuit 5 is that superposition is processed on the forward position of pulse to the discharge that discharging gap 8 applies on road 3, power-amplifier stage unit, to increase the discharge breakdown explosive force between the electro discharge machining gapping place of being made up of tool-electrode and workpiece, this is vital for the electroceramics spark machined.
The present invention compared with prior art has following advantage:
1, owing to adopt the MOS power amplifier of voltage-controlled type, leading-edge pulse time is less than the transistor switching circuit of current-control type, and pulse frequency is higher than the latter.
2, the quick-fried circuit of increasing of LC oscillation boosting is arranged, its energy is processed the impulsive synchronization superposition on electro discharge machining gapping place by electronic switch and discharge, has increased discharge breakdown explosive force, has improved working (machining) efficiency.
3, owing to increase the influence that quick-fried circuit storage power is not subjected to the electro discharge machining gapping place state, not only can adapt to kerosene working solution medium, and can adapt to emulsion, the spark machined of working solutions such as deionized water.
4, be applicable to Electric Discharge Machining, also be applicable to Wire-cut Electrical Discharge Machining.
Embodiments of the invention 1, the frequency that master-oscillator element circuit of the present invention sends is 200Hz-200KHz, dc source voltage is 200-400V, pulse width is 1-16 μ s, and the pulse spacing adapts to regulates processing electric current 1-6A, processing mode adopts Wire EDM, working media is an emulsion, and workpiece is the polycrystalline diamond composite ceramic material, and processing rear surface roughness is Ra0.32 μ m.Working (machining) efficiency improves 5-30 doubly than common electric spark working pulse power source.
Claims (3)
1, a kind of pulse power that is used for the conducting ceramic material spark machined, this pulse power comprises master-oscillator element circuit 1, the element circuit 2 of preposition amplification, power-amplifier stage element circuit 3 electronic switching circuits 4 increase quick-fried circuit 5, dc source 6, current-limiting circuit 7,
After said master-oscillator list does not have an output of circuit 1 pulse connects preamplifier state element circuit 2, be connected with power-amplifier stage element circuit 3,
One group of output of said dc source 6 is connected with power-amplifier stage element circuit 3 through current-limiting circuit 7, and forms the loop with electro discharge machining gapping place 8,
Saidly increase quick-fried circuit 5 and form by a charge circuit and a discharge loop,
Said charge circuit is made up of one group of output, diode D, inductance L, capacitor C of dc source 6,
Said discharge loop is by capacitor C, resistance R
1With said electronic switching circuit 4, electro discharge machining gapping place 8 is formed,
Another road output control electronic switching circuit 4 of said master-oscillator element circuit 1,
It is characterized in that:
Electronic switching circuit is by resistance R
2, the MOS power amplifier forms, one tunnel output of the said master-oscillator element circuit 1 of said resistance 2 one terminations, the grid level of the said MOS power amplifier of its another termination, the drain electrode of said MOS power amplifier connect said resistance R
1Its source electrode inserts electro discharge machining gapping place 8.
2, a kind of pulse power described in claim 1 is characterized in that:
Electronic switching circuit is by resistance R
2, IGCT SCR forms one tunnel output of the said master-oscillator element circuit 1 of said resistance 2 one terminations, the control utmost point of the said IGCT SCR of its another termination, the anodal connecting resistance R of said IGCT
1, its negative level connects electro discharge machining gapping place 8.
3, a kind of pulse power described in claim 1 or 2, it is characterized in that: the frequency of master-oscillator element circuit 1 is 200Hz-200KHz, and dc source voltage is 100-400V, and pulse width is 1-1000 μ s, and processing electric current is 1-30A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90109392 CN1028848C (en) | 1990-11-26 | 1990-11-26 | Pulse power supply for electric spark machine of conducting ceramic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90109392 CN1028848C (en) | 1990-11-26 | 1990-11-26 | Pulse power supply for electric spark machine of conducting ceramic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1061925A CN1061925A (en) | 1992-06-17 |
| CN1028848C true CN1028848C (en) | 1995-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90109392 Expired - Fee Related CN1028848C (en) | 1990-11-26 | 1990-11-26 | Pulse power supply for electric spark machine of conducting ceramic material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028848C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722622A (en) * | 2012-10-11 | 2014-04-16 | 发那科株式会社 | Wire electric discharge machine and wire electric discharge machining method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108866547A (en) * | 2018-09-12 | 2018-11-23 | 北矿磁材（阜阳）有限公司 | A kind of neodymium iron boron magnetic body electric spark on surface enhanced processing method based on laser cleaning |
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1990
- 1990-11-26 CN CN 90109392 patent/CN1028848C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722622A (en) * | 2012-10-11 | 2014-04-16 | 发那科株式会社 | Wire electric discharge machine and wire electric discharge machining method |
| CN103722622B (en) * | 2012-10-11 | 2016-12-07 | 发那科株式会社 | WEDM and electric spark wire cutting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1061925A (en) | 1992-06-17 |
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