CN107552904A - A kind of processing power source and processing method for being used to carry out cermet FGM electrical discharge machining - Google Patents
A kind of processing power source and processing method for being used to carry out cermet FGM electrical discharge machining Download PDFInfo
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Abstract
A kind of processing power source and processing method for being used to carry out cermet FGM electrical discharge machining；Belong to spark erosion technique field.The problem of it is low to solve existing electric discharge machining apparatus processing efficiency, and can only be processed in the form of Sing plus.Design of the present invention by processing major loop and control loop realizes the highly-efficient processing to cermet FGM；Major loop includes high-low voltage selection circuit and capacitance selection circuit, and the formulation for the different electric discharge strategies of processing unit (plant) of the present invention provides larger selection space；Using controller of the CPLD pulse control modules as processing unit (plant) pulse, cost is low, control program program is easy to write and safeguarded, detecting system it is flexible larger.Electrical discharge machining is carried out present invention is mainly used for the material to multilayer.
Description
Technical field
The invention belongs to spark erosion technique field.
Background technology
In recent years, metal-ceramic FGM is due to its unique structure and performance advantage, in space flight, nuclear energy, life
It is used widely in the fields such as thing.However, the processing of metal-ceramic FGM is always a disaster of manufacturing field
Point.Main cause：Cermet FGM complicated component, mainly including metal ingredient, metal-base composites composition
And ceramic component, meanwhile, the material incrementally increases from metal ingredient to ceramic component hardness.Therefore, traditional machine such as grinding, turning
Tool processing method is difficult to the highly-efficient processing of metal-ceramic FGM.
The problem of for metal-base composites and big Machining of Ceramics hardness, domestic and foreign scholars propose many solutions
Method, wherein electrical discharge machining are more common a solution.Electric discharge machining method is one kind of special process method,
Compared to Conventional machining methods, its maximum advantage is noncontact processing.Electrical discharge machining material be by workpiece and
Continuously sparking electric discharge between instrument reaches the purpose of ablation material.Electrode and instrument do not occur directly to contact, therefore, electricity fire
Flower processing is not limited by the hardness of material, is especially suitable for the processing of metal-base composites and ceramic material.The country is to above-mentioned
The electrical discharge machining of material has done many researchs, mainly includes：Harbin Institute of Technology exists《Procedia CIRP》On
《Surface Properties of SiCp/Al Composite by Powder-Mixed EDM》；China University Of Petroleum Beijing exists
《Mechanical engineering journal》On《Insulation and weakly conducting engineering ceramics electric spark milling Combined Machining Technology and study mechanism》.This
Outside, Publication No. CN102642057A patent discloses a kind of special miniature electro-discharge machining of PCD/CBN/ hard alloy/cutter
Power supply, solve the problems, such as that existing power supply is bulky, power consumption is big.These researchs are main to concentrate metal-base composites or ceramics
Processing technology, process principle and power volume of material etc., solve above-mentioned material from different perspectives to a certain extent and add
Work problem.
Compared to studies in China, foreign countries are mainly from electrode material, the metal-base composites of different proportion and processing power source arteries and veins
Rush three aspects of shape to deploy, mainly include：Tokyo Univ Japan exists《Journal of Materials Processing
Technology》On《Effect of electrode material on electrical discharge
machining of alumina》；Ren Ji universities of South Korea exist《Materials and Manufacturing Processes》On
's《- the 35vol%SiCp/Al of Electrical discharge machining of functionally graded 15
composites》；Belgian Univ Louvain exists《CIRP Annals》On《Influence of the pulse shape on
the EDM performance of Si3N4-TiN ceramic composite》.Pass through electrode material, different proportion material
The system research of influence of the research and pulse shape of processing characteristics to Ceramic manufacturing, the processing efficiency of material is improved really,
But research is still only confined to metal-base composites or ceramic material, control method is still very simple off-line type.
General character above also resides in：Research contents is only confined to metal-base composites or ceramic material, not incite somebody to action both
Combine consideration.Due to metal-base composites and the difference of ceramic material structure, necessarily cause the difference of processing characteristics, it is single
One of pure research can not necessarily meet the processing request of metal-ceramic FGM.The research of power supply is only confined to
Offline parameter set, do not realize real-time status detection and control, for the fine receiving of homogenous material, but for metal-
Ceramic FGM uses single offline machined parameters, can not meet the requirement of metal-ceramic functional material highly-efficient processing.
In consideration of it, targetedly carried out metal-ceramic FGM electrical discharge machining high-efficient power device with
The research of method, the efficiency of metal-ceramic FGM electrical discharge machining can be not only improved, and to lifting China gold
The processing of category-ceramic FGM and application level are significant.
The content of the invention
The present invention is low in order to solve existing electric discharge machining apparatus processing efficiency, and can only be carried out in the form of Sing plus
The problem of processing, the processing to metal-ceramic FGM can not be met, the invention provides one kind be used for metal-
Ceramic FGM carries out the processing power source and processing method of electrical discharge machining.
A kind of processing power source for being used to carry out metal-ceramic FGM electrical discharge machining, it includes electric discharge and examined
Survey module, CPLD pulse control modules, drive module, high-low voltage selection circuit and capacitance selection circuit；
The discharge condition signal that discharge examination module is used between detecting electrode and part to be processed, is additionally operable to treat processing department
Each layer of part is identified；Part to be processed is metal-ceramic FGM, and is followed successively by metal level, ladder from top to bottom
Spend layer and ceramic layer；
The control signal output of discharge examination module is connected with the control signal input of CPLD pulse control modules,
The pulse control signal output end of CPLD pulse control modules and the pulse control signal input of drive module connect；
Drive module is used to isolate the control signal of reception and power amplification, the high pressure gating signal of drive module
The high pressure gating signal input of output end and high-low voltage selection circuit connects, the low pressure gating signal output end of drive module with
The low pressure gating signal input of high-low voltage selection circuit connects, the high-voltage driven signal output end and capacitance selection of drive module
The high-voltage driven signal input connection of circuit, the low voltage drive signal output end of drive module and the low pressure of capacitance selection circuit
Driving signal input connects；
High-low voltage selection circuit, for providing power supply to capacitance selection circuit；
The positive power output end of capacitance selection circuit is connected with electrode；
The positive negative sense power output end of capacitance selection circuit is connected with part to be processed；And electrode is relative with part to be processed
Set.
Preferably, described high-low voltage selection circuit includes high voltage power supply E1, low-tension supply E2, resistance R1, resistance
R2, diode D1, diode D2, NPN type metal-oxide-semiconductor MgWith NPN type metal-oxide-semiconductor Md；
High voltage power supply E1 positive pole is connected with resistance R1 one end, and the resistance R1 other end connects with diode D1 anode
Connect, diode D1 negative electrode and NPN type metal-oxide-semiconductor MgDrain electrode connection, NPN type metal-oxide-semiconductor MgSource electrode and NPN type metal-oxide-semiconductor MdSource
Pole connects, NPN type metal-oxide-semiconductor MgGrid and drive module high pressure gating signal output end connect；
Low-tension supply E2 positive pole is connected with resistance R2 one end, and the resistance R2 other end connects with diode D2 anode
Connect, diode D2 negative electrode and NPN type metal-oxide-semiconductor MdDrain electrode connection, NPN type metal-oxide-semiconductor MdGrid and drive module low pressure select
Messenger output end connects；
NPN type metal-oxide-semiconductor MgForward voltage output end of the source electrode as high-low voltage selection circuit；
High voltage power supply E1 negative pole and low-tension supply E2 negative pole connect simultaneously, and as the negative of high-low voltage selection circuit
To voltage output end.
Preferably, the capacitance selection circuit includes processing electric capacity C1, high-energy capacitor C2, NPN type metal-oxide-semiconductor Mc1And NPN
Type metal-oxide-semiconductor Mc2；
Process electric capacity C1 one end and NPN type metal-oxide-semiconductor MgSource electrode, high-energy capacitor C2 one end and electrode one end simultaneously
Connection；
Process the electric capacity C1 other end and NPN type metal-oxide-semiconductor Mc1Drain electrode connection, NPN type metal-oxide-semiconductor Mc1Source electrode and NPN type
Metal-oxide-semiconductor Mc2Source electrode and part to be processed connect simultaneously, NPN type metal-oxide-semiconductor Mc1Grid and drive module low voltage drive signal
Output end connects；
The high-energy capacitor C2 other end and NPN type metal-oxide-semiconductor Mc2Drain electrode connection, NPN type metal-oxide-semiconductor Mc2Grid and driving
The high-voltage driven signal output end connection of module.
A kind of described processing power source for being used to carry out metal-ceramic FGM electrical discharge machining, in addition to
State display module；
State display module is used for the working condition of driver module.
Preferably, described NPN type metal-oxide-semiconductor MgWith NPN type metal-oxide-semiconductor Mc2Realized using IRFP460 models Mosfet.
Preferably, the NPN type metal-oxide-semiconductor MdWith NPN type metal-oxide-semiconductor Mc1Realized using the Msofet of IRF840 models.
Preferably, the CPLD pulse control modules are realized using EPM240 types programmable logic controller (PLC).
Realized using a kind of described processing power source for being used to carry out metal-ceramic FGM electrical discharge machining
Processing method, this method comprises the following steps：
Step 1：Each layer that electrode treats processing component according to default discharge condition is processed, and CPLD pulse controls
Discharge condition signal between electrode and part to be processed that molding block detects according to discharge examination module in real time and to be added
Each layer of Ministry of worker's part is identified, and produces corresponding control signal, when discharge examination module detects part gradient layer to be processed
In incomplete discharge signal when, CPLD pulse control modules export high energy pulse control signal to drive module so that electric
High-voltage discharge is carried out between pole and part to be processed；When discharge examination module detects the long pulse in part ceramic layer to be processed
During discharge signal, pulse control signal is extended between CPLD pulse control modules output arteries and veins, makes to carry out between electrode and part to be processed
Electric discharge is extended between arteries and veins；
Step 2：The pulse control signal that drive module exports to CPLD pulse control modules is isolated and power is put
Greatly, and the pulse control signal after isolation and power amplification carries out gating control to high-low voltage selection circuit and capacitance selection circuit
System, so as to change the discharge condition between electrode and part to be processed, is finally completed the processing to treating each layer of processing component.
The present invention be directed to the change of metal-ceramic FGM component gradient, traditional electric spark power supply processing can not
Realize and Processing Strategies are changed according to the machining state of heterogeneity, and the problem of processing efficiency is low be present, the present invention is with efficient
It is target to process metal-ceramic functionally gradient, according to metal-ceramic FGM difference gradient components discharge condition not
Together, different Pulse Width Control strategies is formulated using CPLD pulse control modules, realizes metal-ceramic electric spark highly-efficient processing.
The beneficial effect that the present invention is brought is that design of the present invention by processing major loop and control loop is realized to gold
The highly-efficient processing of category-ceramic FGM；Major loop includes high-low voltage selection circuit and capacitance selection circuit, is this hair
The formulation of the different electric discharge strategies of bright processing unit (plant) provides larger selection space；Using CPLD pulse control modules as processing
The controller of device pulse, cost is low, control program program is easy to write and safeguarded, detecting system it is flexible larger；For gold
The different layers of category-ceramic FGM, change pulse control mode in real time, greatly improve processing efficiency, and processing efficiency
Improve more than 30%.
Brief description of the drawings
Fig. 1 is the composition structure chart of metal-ceramic FGM；
Fig. 2 is the discharge waveform figure in metal-ceramic FGM electrical spark working man-hour；
Fig. 3 is a kind of processing for being used to carry out metal-ceramic FGM electrical discharge machining of the present invention
Power supply；
Fig. 4 is of the present invention a kind of for adding to metal-ceramic FGM progress electrical discharge machining to utilize
The design sketch that work power supply is controlled to machining state；(a) voltage between electrode and part to be processed under electrion state
Oscillogram；(b) voltage oscillogram between electrode and part to be processed under pulse expansion discharge condition.
Embodiment
Embodiment one：Illustrate present embodiment referring to Fig. 1 and Fig. 3, one kind described in present embodiment be used for pair
Metal-ceramic FGM carries out the processing power source of electrical discharge machining, and it includes discharge examination module 1, CPLD pulse controls
Molding block 2, drive module 3, high-low voltage selection circuit 5 and capacitance selection circuit 6；
The discharge condition signal that discharge examination module 1 is used between detecting electrode 7 and part to be processed 8, is additionally operable to to be added
Each layer of Ministry of worker's part 8 is identified；Part 8 to be processed is metal-ceramic FGM, and is followed successively by metal from top to bottom
Layer, gradient layer and ceramic layer；
The control signal output of discharge examination module 1 is connected with the control signal input of CPLD pulse control modules 2,
The pulse control signal output end of CPLD pulse control modules 2 is connected with the pulse control signal input of drive module 3；
Drive module 3 is used to carry out isolation power amplification, the high pressure gating signal of drive module 3 to the control signal of reception
Output end and the high pressure gating signal input of high-low voltage selection circuit 5 connect, the low pressure gating signal output end of drive module 3
Connect with the low pressure gating signal input of high-low voltage selection circuit 5, the high-voltage driven signal output end and electric capacity of drive module 3
The high-voltage driven signal input connection of selection circuit 6, the low voltage drive signal output end and capacitance selection circuit of drive module 3
6 low voltage drive signal input connection；
High-low voltage selection circuit 5, for providing power supply to capacitance selection circuit 6；
The positive power output end of capacitance selection circuit 6 is connected with electrode 7；
The positive negative sense power output end of capacitance selection circuit 6 is connected with part 8 to be processed；And electrode 7 and part 8 to be processed
It is oppositely arranged.
Present embodiment, detect metal-ceramic FGM difference discharge condition in real time by discharge examination module 1
With the identification of different layers, pulse parameter is then adjusted according to each layer machining state in real time, realizes metal-ceramic FGM
The highly-efficient processing of different layers, and then improve the overall processing efficiency of the material.
As shown in Fig. 2 the discharge condition of gradient layer and ceramic layer is broadly divided into three kinds of states in the present embodiment：Regular picture
(a), not exclusively electric discharge (b) and long-pulse discharge (d).In above-mentioned three kinds of discharge conditions, regular picture (a) is needed for processing
Discharge condition, not exclusively discharge (b) and long-pulse discharge (d) are abnormal electric discharge, and should try one's best elimination in process.Pin
To abnormal discharge condition, processing unit (plant) of the present invention is use up by controlling between high-voltage discharge time (c) and arteries and veins expansion time (e)
Elimination respectively above-mentioned not exclusively electric discharge (b) and the long-pulse discharge (d) of amount, improve processing conditions, improve to metal-ceramic function
The processing efficiency of functionally gradient material (FGM).
Embodiment two：Illustrate present embodiment, present embodiment and embodiment one referring to Fig. 1 and Fig. 3
A kind of described processing power source difference for being used to carry out metal-ceramic FGM electrical discharge machining is, described
High-low voltage selection circuit 5 include high voltage power supply E1, low-tension supply E2, resistance R1, resistance R2, diode D1, diode D2,
NPN type metal-oxide-semiconductor MgWith NPN type metal-oxide-semiconductor Md；
High voltage power supply E1 positive pole is connected with resistance R1 one end, and the resistance R1 other end connects with diode D1 anode
Connect, diode D1 negative electrode and NPN type metal-oxide-semiconductor MgDrain electrode connection, NPN type metal-oxide-semiconductor MgSource electrode and NPN type metal-oxide-semiconductor MdSource
Pole connects, NPN type metal-oxide-semiconductor MgGrid be connected with the high pressure gating signal output end of drive module 3；
Low-tension supply E2 positive pole is connected with resistance R2 one end, and the resistance R2 other end connects with diode D2 anode
Connect, diode D2 negative electrode and NPN type metal-oxide-semiconductor MdDrain electrode connection, NPN type metal-oxide-semiconductor MdGrid and drive module 3 low pressure
Gating signal output end connects；
NPN type metal-oxide-semiconductor MgForward voltage output end of the source electrode as high-low voltage selection circuit 5；
High voltage power supply E1 negative pole and low-tension supply E2 negative pole connect simultaneously, and as high-low voltage selection circuit 5
Negative voltage output end.
Embodiment three：Illustrate present embodiment, present embodiment and embodiment two referring to Fig. 1 and Fig. 3
A kind of described processing power source for carrying out electrical discharge machining to metal-ceramic FGM, which is distinguished, to be, the electricity
Holding selection circuit 6 includes processing electric capacity C1, high-energy capacitor C2, NPN type metal-oxide-semiconductor Mc1With NPN type metal-oxide-semiconductor Mc2；
Process electric capacity C1 one end and NPN type metal-oxide-semiconductor MgSource electrode, high-energy capacitor C2 one end and electrode 7 one end it is same
When connect；
Process the electric capacity C1 other end and NPN type metal-oxide-semiconductor Mc1Drain electrode connection, NPN type metal-oxide-semiconductor Mc1Source electrode and NPN type
Metal-oxide-semiconductor Mc2Source electrode and part to be processed 8 connect simultaneously, NPN type metal-oxide-semiconductor Mc1The low-voltage driving of grid and drive module 3 believe
The connection of number output end；
The high-energy capacitor C2 other end and NPN type metal-oxide-semiconductor Mc2Drain electrode connection, NPN type metal-oxide-semiconductor Mc2Grid and driving
The high-voltage driven signal output end connection of module 3.
In present embodiment,
1) CPLD pulse control modules 2 send signal according to discharge examination module 1, judge to need the pulse sent in next step
State；
When machining state is in regular picture state (a), CPLD pulse control modules 2 are to high-low voltage selection circuit 5
Low pressure gating, high pressure shutdown signal are sent, while gating processing electric capacity C1 is sent to capacitance selection circuit 6, closes high-energy capacitor
C2 signals；
When machining state is not exclusively discharges when (b), CPLD pulse control modules 2 are sent out to high-low voltage selection circuit 5
Go out low pressure closing, high pressure opening signal, while closing processing electric capacity C1 is sent to capacitance selection circuit 6, open high-energy capacitor C2
Signal；
When machining state is long-pulse discharge (d), CPLD pulse control modules 2 send pulse to capacitance selection circuit 6
Low tension loop is opened, closes high tension loop signal.
2) signal that drive module 3 is sent to CPLD pulse control modules 2 carries out Phototube Coupling and power amplification, then will
Signal after amplification is sent to the drive end of each NPN type metal-oxide-semiconductor, and different NPN type metal-oxide-semiconductor break-makes is driven according to control signal.
When machining state is in regular picture state (a), drive module 3 can be sent according to CPLD pulse control modules 2
Control signal, open low pressure NPN type metal-oxide-semiconductor Md, close high pressure NPN type metal-oxide-semiconductor Mg, open processing electric capacity MC1, close high energy
Electric capacity MC2；
When processing produces not exclusively electric discharge (b) in gradient layer, drive module 3 can be according to CPLD pulse control modules 2
The control signal sent can close low pressure NPN type metal-oxide-semiconductor Md, open high pressure NPN type metal-oxide-semiconductor Mg, close processing electric capacity MC1, open
High-energy capacitor MC2, produce high-voltage discharge waveform (c)；
When processing produces long-pulse discharge (d) in ceramic layer, drive module 3 can open low pressure NPN in a pulsed fashion
Type metal-oxide-semiconductor Md, close high pressure NPN type metal-oxide-semiconductor Mg, open processing electric capacity MC1, close high-energy capacitor MC2, produce spreading wave form between arteries and veins
(e)。
As shown in figure 4, one kind described in the present embodiment is used to carry out electrical discharge machining to metal-ceramic FGM
Processing power source, under different discharge conditions, in real time control discharge condition result figure, it can be seen that when at present be incomplete
During electric discharge, processing unit (plant) of the present invention can such as be schemed shown in (a), together by controlling the break-make of high tension loop to realize high-voltage discharge
When by (b) figure can be seen that processing unit (plant) of the present invention extends between can realizing real-time arteries and veins.
Embodiment four：Illustrate present embodiment referring to Fig. 3, present embodiment with described in embodiment one
A kind of processing power source difference for being used to carry out metal-ceramic FGM electrical discharge machining is, in addition to state shows
Show module 4；
State display module 4 is used for the working condition of driver module 3.
Embodiment five：Illustrate present embodiment, present embodiment and described in embodiment three one referring to Fig. 3
Plant the difference being used for the processing power source of metal-ceramic FGM progress electrical discharge machining to be, described NPN type
Metal-oxide-semiconductor MgWith NPN type metal-oxide-semiconductor Mc2Realized using IRFP460 models Mosfet.
Embodiment six：Illustrate present embodiment, present embodiment and described in embodiment three one referring to Fig. 3
Plant the difference being used for the processing power source of metal-ceramic FGM progress electrical discharge machining to be, the NPN type MOS
Pipe MdWith NPN type metal-oxide-semiconductor Mc1Realized using the Msofet of IRF840 models.
Embodiment seven：Illustrate present embodiment, present embodiment and described in embodiment one one referring to Fig. 3
Plant the difference being used for the processing power source of metal-ceramic FGM progress electrical discharge machining to be, the CPLD pulses
Control module 2 is realized using EPM240 types programmable logic controller (PLC).
Embodiment eight：Illustrate present embodiment referring to Fig. 3, be used for pair using a kind of described in embodiment one
Metal-ceramic FGM carries out the processing method that the processing power source of electrical discharge machining is realized, this method includes following step
Suddenly：
Step 1：Each layer that electrode 7 treats processing component 8 according to default discharge condition is processed, and CPLD pulses
Discharge condition signal between electrode 7 and part to be processed 8 that control module 2 is detected according to discharge examination module 1 in real time and
Each layer for treating processing component 8 is identified, and produces corresponding control signal, when discharge examination module 1 detects the Ministry of worker to be added
During incomplete discharge signal in the gradient layer of part 8, CPLD pulse control modules 2 export high energy pulse control signal to drive module
3, so that carrying out high-voltage discharge between electrode 7 and part to be processed 8；When discharge examination module 1 detects that part 8 to be processed is made pottery
During long-pulse discharge signal in enamel coating, CPLD pulse control modules 2 extend pulse control signal between exporting arteries and veins, make electrode 7 with
Carry out extending electric discharge between arteries and veins between part 8 to be processed；
Step 2：The pulse control signal that drive module 3 exports to CPLD pulse control modules 2 is isolated and power is put
Greatly, and the pulse control signal after isolation and power amplification gates to high-low voltage selection circuit 5 and capacitance selection circuit 6
Control, so as to change the discharge condition between electrode 7 and part to be processed 8, is finally completed and adds to treating 8 each layer of processing component
Work.
A kind of knot for being used to carry out metal-ceramic FGM the processing power source of electrical discharge machining of the present invention
Structure is not limited to the concrete structure described in the respective embodiments described above, can also be that the technology described in the respective embodiments described above is special
The reasonable combination of sign.
Claims (8)
1. a kind of processing power source for being used to carry out metal-ceramic FGM electrical discharge machining, it is characterised in that it is wrapped
Include discharge examination module (1), CPLD pulse control modules (2), drive module (3), high-low voltage selection circuit (5) and electric capacity choosing
Select circuit (6)；
The discharge condition signal that discharge examination module (1) is used between detecting electrode (7) and part to be processed (8), is additionally operable to treat
Each layer of processing component (8) is identified；Part (8) to be processed is metal-ceramic FGM, and from top to bottom successively
For metal level, gradient layer and ceramic layer；
The control signal output of discharge examination module (1) is connected with the control signal input of CPLD pulse control modules (2),
The pulse control signal output end of CPLD pulse control modules (2) is connected with the pulse control signal input of drive module (3)；
Drive module (3) is used to isolate the control signal of reception and power amplification, the high pressure gating letter of drive module (3)
Number output end and the high pressure gating signal input of high-low voltage selection circuit (5) connect, the low pressure gating signal of drive module (3)
Output end and the low pressure gating signal input of high-low voltage selection circuit (5) connect, and the high-voltage driven signal of drive module (3) is defeated
Go out end to be connected with the high-voltage driven signal input of capacitance selection circuit (6), the low voltage drive signal output end of drive module (3)
It is connected with the low voltage drive signal input of capacitance selection circuit (6)；
High-low voltage selection circuit (5), for providing power supply to capacitance selection circuit (6)；
The positive power output end of capacitance selection circuit (6) is connected with electrode (7)；
The positive negative sense power output end of capacitance selection circuit (6) is connected with part to be processed (8)；And electrode (7) and the Ministry of worker to be added
Part (8) is oppositely arranged.
A kind of 2. processing for being used to carry out metal-ceramic FGM electrical discharge machining according to claim 1
Power supply, it is characterised in that described high-low voltage selection circuit (5) includes high voltage power supply E1, low-tension supply E2, resistance R1, electricity
Hinder R2, diode D1, diode D2, NPN type metal-oxide-semiconductor MgWith NPN type metal-oxide-semiconductor Md；
High voltage power supply E1 positive pole is connected with resistance R1 one end, and the resistance R1 other end is connected with diode D1 anode, and two
Pole pipe D1 negative electrode and NPN type metal-oxide-semiconductor MgDrain electrode connection, NPN type metal-oxide-semiconductor MgSource electrode and NPN type metal-oxide-semiconductor MdSource electrode connect
Connect, NPN type metal-oxide-semiconductor MgGrid be connected with the high pressure gating signal output end of drive module (3)；
Low-tension supply E2 positive pole is connected with resistance R2 one end, and the resistance R2 other end is connected with diode D2 anode, and two
Pole pipe D2 negative electrode and NPN type metal-oxide-semiconductor MdDrain electrode connection, NPN type metal-oxide-semiconductor MdThe low pressure of grid and drive module (3) gate
Signal output part connects；
NPN type metal-oxide-semiconductor MgForward voltage output end of the source electrode as high-low voltage selection circuit (5)；
High voltage power supply E1 negative pole and low-tension supply E2 negative pole connect simultaneously, and as the negative of high-low voltage selection circuit (5)
To voltage output end.
A kind of 3. processing for being used to carry out metal-ceramic FGM electrical discharge machining according to claim 2
Power supply, it is characterised in that the capacitance selection circuit (6) includes processing electric capacity C1, high-energy capacitor C2, NPN type metal-oxide-semiconductor Mc1With
NPN type metal-oxide-semiconductor Mc2；
Process electric capacity C1 one end and NPN type metal-oxide-semiconductor MgSource electrode, high-energy capacitor C2 one end and one end of electrode (7) connect simultaneously
Connect；
Process the electric capacity C1 other end and NPN type metal-oxide-semiconductor Mc1Drain electrode connection, NPN type metal-oxide-semiconductor Mc1Source electrode and NPN type metal-oxide-semiconductor
Mc2Source electrode and part to be processed (8) connect simultaneously, NPN type metal-oxide-semiconductor Mc1The low-voltage driving of grid and drive module (3) believe
The connection of number output end；
The high-energy capacitor C2 other end and NPN type metal-oxide-semiconductor Mc2Drain electrode connection, NPN type metal-oxide-semiconductor Mc2Grid and drive module
(3) high-voltage driven signal output end connection.
A kind of 4. processing for being used to carry out metal-ceramic FGM electrical discharge machining according to claim 1
Power supply, it is characterised in that also including state display module (4)；
State display module (4) is used for the working condition of driver module (3).
A kind of 5. processing for being used to carry out metal-ceramic FGM electrical discharge machining according to claim 3
Power supply, it is characterised in that described NPN type metal-oxide-semiconductor MgWith NPN type metal-oxide-semiconductor Mc2Realized using IRFP460 models Mosfet.
A kind of 6. processing for being used to carry out metal-ceramic FGM electrical discharge machining according to claim 3
Power supply, it is characterised in that the NPN type metal-oxide-semiconductor MdWith NPN type metal-oxide-semiconductor Mc1Realized using the Msofet of IRF840 models.
A kind of 7. processing for being used to carry out metal-ceramic FGM electrical discharge machining according to claim 1
Power supply, it is characterised in that the CPLD pulse control modules (2) are realized using EPM240 types programmable logic controller (PLC).
8. using a kind of processing for being used to carry out metal-ceramic FGM electrical discharge machining described in claim 1
The processing method that power supply is realized, it is characterised in that this method comprises the following steps：
Step 1：Each layer that electrode (7) treats processing component (8) according to default discharge condition is processed, and CPLD pulses
Electric discharge shape between electrode (7) and part to be processed (8) that control module (2) is detected according to discharge examination module (1) in real time
State signal and treat each layer of processing component (8) and be identified, corresponding control signal is produced, when discharge examination module (1) is examined
When measuring the incomplete discharge signal in part to be processed (8) gradient layer, CPLD pulse control modules (2) output high energy pulse control
Signal processed is to drive module (3), so that carrying out high-voltage discharge between electrode (7) and part to be processed (8)；When discharge examination mould
When block (1) detects the long-pulse discharge signal in part to be processed (8) ceramic layer, CPLD pulse control modules (2) output arteries and veins
Between extend pulse control signal, make between electrode (7) and part to be processed (8) carry out arteries and veins between extend electric discharge；
Step 2：The pulse control signal that drive module (3) exports to CPLD pulse control modules (2) is isolated and power is put
Greatly, and the pulse control signal after isolation and power amplification is carried out to high-low voltage selection circuit (5) and capacitance selection circuit (6)
Gating control, so as to change the discharge condition between electrode (7) and part to be processed (8), is finally completed to treating processing component (8)
The processing of each layer.
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