CN207026652U - Electrical discharge machining pulse power and processing unit (plant) - Google Patents
Electrical discharge machining pulse power and processing unit (plant) Download PDFInfo
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- CN207026652U CN207026652U CN201720243981.1U CN201720243981U CN207026652U CN 207026652 U CN207026652 U CN 207026652U CN 201720243981 U CN201720243981 U CN 201720243981U CN 207026652 U CN207026652 U CN 207026652U
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Abstract
The utility model provides electrical discharge machining pulse power and processing unit (plant).A kind of electrical discharge machining pulse power includes：Impulse generator, the impulse generator generate start pulse signal；First power circuit, first power circuit generate first voltage signal under the control of the start pulse signal；Second source circuit, the second source circuit generate second voltage signal under the control of the start pulse signal；And electrode, the electrode are coupled to first power circuit and the second source circuit to receive the first voltage signal and/or the second voltage signal to form spark discharge.
Description
Technical field
It the utility model is related to electric spark machining field, more particularly to electrical discharge machining pulse power and processing unit (plant).
Background technology
Electrical discharge machining is to corrode metal using spark discharge to realize the processing method of metal cutting.The work of this processing
Process compensate for some deficiencies of machining, it has also become the important means in mould industry, national defense industry and precise and tiny manufacture.
Electric spark power supply forms spark discharge as the important composition part in EDM System for providing pulse current,
Its performance has to technical-economic indexes such as the machining accuracy of electrical discharge machining, production efficiency, tool electrode loss, utilization rate of electrical
Large effect.
Traditional power supply uses resistance current limliting, and the utilization rate of electric energy is low (for example, about 26%), and machine tooling efficiency is slow, therefore
Hinder maintenance rate more and more higher, it is therefore desirable for a kind of energy-conservation of design, efficient electrical discharge machining pulse power.
In addition, because the current density on electrode machining surface is definite value, about 8-10A/cm3, common power processing electricity
Stream is only 60A.The electric current that power supply provides is small, the electro-discharge machining region of each electrode can be caused small, for the workpiece of high surface area
Electric machining, such as mould inner surface, it is necessary to repeatedly be processed using multiple electrodes of different shapes, processing efficiency is low.Existing power supply
The electrode of processing high surface area workpiece can not be realized.Therefore it is also expected to a kind of electrical spark working that can process high surface area workpiece of design
Work power supply.
Utility model content
The utility model provides efficient electrical discharge machining pulse power and processing unit (plant).
In one embodiment of the present utility model, there is provided a kind of electrical discharge machining pulse power, it includes：Pulse generation
Device, the impulse generator generate start pulse signal；First power circuit, first power circuit is in the trigger pulse
First voltage signal is generated under the control of signal；Second source circuit, the second source circuit is in the start pulse signal
Control under generate second voltage signal；And electrode, the electrode is coupled to first power circuit and second electricity
Source circuit is to receive the first voltage signal and/or the second voltage signal to form spark discharge.
In one aspect, first power circuit includes first voltage source, first coupled to the first voltage source
Power discharging device, coupled to first power discharging device inductance and be coupling between the inductance and the electrode second
Power discharging device, wherein the electrical discharge machining pulse power also includes：First PWM controller, first PWM controller are coupled to institute
Impulse generator is stated to receive the start pulse signal, and generates first in the effectual time of the start pulse signal
Pulse signal and the second pulse signal, the first power discharging device described in the first pulse signal on or off is to control described
Charging of one voltage source to the inductance, and the second power discharging device described in the second pulse signal on or off with control from
The inductance to the electrode the first voltage signal.
In one aspect, first power circuit also includes：Current feedback unit, the current feedback unit detect institute
Inductance is stated to the electric current of the electrode and current detection signal is supplied to first PWM controller to adjust first arteries and veins
Rush the pulsewidth and pulse spacing size of signal.
In one aspect, first pulse signal is included in the periodicity in the effectual time of the start pulse signal
Pulse signal, the first power discharging device described in the cyclic pulse signal on or off is to control the first voltage source to institute
State the charging of inductance.
In one aspect, first pulse signal and second pulse signal are from the effective of the start pulse signal
Period has started to start after postponing specified time.
In one aspect, first pulse signal and second pulse signal are from the effective of the start pulse signal
Period has started to start after postponing 0-10us.
In one aspect, first power circuit also includes：From workpiece to the discharge path of the electrode to discharge
The dump energy stored between electrode and the workpiece is stated, one end of the discharge path is coupled to the workpiece, the electric discharge
The other end of path is coupling between second power discharging device and the electrode.
In one aspect, the discharge path includes：Transistor, the positive terminal of the transistor are coupled to the workpiece,
The negative pole end of the transistor is coupling between second power discharging device and the electrode.
In one aspect, the inductance is air core inductor.
In one aspect, the start pulse signal is 20us -1000us adjustable start pulse signal.
In one aspect, the second source circuit includes：The second voltage source；And be coupling in the second voltage source with
The 3rd power discharging device between the electrode, wherein the second voltage source carries via the 3rd power discharging device to the electrode
For the second voltage signal.
In one aspect, the electrical discharge machining pulse power also includes：Second PWM controller, the second PWM controller coupling
The impulse generator is bonded to receive the start pulse signal, and is generated in the effectual time of the start pulse signal
The 3rd pulse signal with the 3rd power discharging device described on or off.
In one aspect, the 3rd pulse signal turns on the 3rd power discharging device with from the second voltage source to institute
State electrode and the second voltage signal is provided, so as to puncture the gap between the electrode and workpiece and establish discharge channel.
In one aspect, the 3rd pulse signal is included in the short of the effectual time beginning of the start pulse signal
Pulse, the 3rd power discharging device turn on during the short pulse, and are turned off after the short pulse terminates.
In one aspect, the effectual time of second pulse signal and the 3rd pulse signal terminates simultaneously.
In one aspect, the voltage of the second voltage source is higher than the voltage of the first voltage source.
In one aspect, the voltage of the first voltage source is 30-90V, and the voltage of the second voltage source is 160V-
190V。
In one embodiment of the present utility model, there is provided a kind of electric discharge machining apparatus, it is included as described above
Electrical discharge machining pulse power.
In one aspect, the electric discharge machining apparatus also includes：Processing groove, the processing groove be used for fix workpiece and
Gap is formed between the electrode of the workpiece and the electrical discharge machining pulse power.
In one embodiment of the present utility model, there is provided a kind of electrical discharge machining pulse power control method, it includes：It is raw
Into start pulse signal；First voltage signal is generated under the control of the start pulse signal using the first power circuit；Make
Second voltage signal is generated under the control of the start pulse signal with second source circuit；And the first voltage is believed
Number and/or the second voltage signal apply to electrode to form spark discharge.
In one aspect, first power circuit includes first voltage source, first coupled to the first voltage source
Power discharging device, coupled to first power discharging device inductance and be coupling between the inductance and the electrode second
Power discharging device, the electrical discharge machining pulse power control method also include：Generation is in the effectual time of the start pulse signal
The first pulse signal and the second pulse signal；Carry out the first power discharging device described on or off using first pulse signal
To control charging of the first voltage source to the inductance；And come using second pulse signal described on or off
Second power discharging device is to control the first voltage signal from the inductance to the electrode.
In one aspect, the electrical discharge machining pulse power control method also includes：The inductance is detected to the electrode
Electric current and the pulsewidth and pulse spacing size that first pulse signal is adjusted according to current detection signal.
In one aspect, first pulse signal is included in the periodicity in the effectual time of the start pulse signal
Pulse signal, the first power discharging device described in the cyclic pulse signal on or off is to control the first voltage source to institute
State the charging of inductance.
In one aspect, first pulse signal and second pulse signal are from the effective of the start pulse signal
Period has started to start after postponing specified time.
In one aspect, first pulse signal and second pulse signal are from the effective of the start pulse signal
Period has started to start after postponing 0-10us.
In one aspect, the electrical discharge machining pulse power control method also includes：Pass through putting from workpiece to the electrode
Electric pathway discharges the dump energy stored between the electrode and the workpiece.
In one aspect, the start pulse signal is 20us -1000us adjustable start pulse signal.
In one aspect, the second source circuit includes the second voltage source and is coupling in the second voltage source and institute
The 3rd power discharging device between electrode is stated, the electrical discharge machining pulse power control method also includes：Generation is in the trigger pulse
The 3rd pulse signal in the effectual time of signal is with the 3rd power discharging device described on or off.
In one aspect, the electrical discharge machining pulse power control method also includes：Turned on using the 3rd pulse signal
3rd power discharging device is described so as to puncture to provide the second voltage signal from the second voltage source to the electrode
Discharge channel is simultaneously established in gap between electrode and workpiece.
In one aspect, the 3rd pulse signal is included in the short of the effectual time beginning of the start pulse signal
Pulse, the 3rd power discharging device turn on during the short pulse, and are turned off after the short pulse terminates.
In one aspect, the effectual time of second pulse signal and the 3rd pulse signal terminates simultaneously.
In one aspect, the voltage of the second voltage source is higher than the voltage of the first voltage source.
In one aspect, the voltage of the first voltage source is 30-90V, and the voltage of the second voltage source is 160V-
190V。
As above, the utility model provides a kind of new electrical discharge machining pulse power and processing unit (plant).The utility model passes through
First power circuit and second source circuit are used cooperatively, it is possible to increase the capacity usage ratio of electrical discharge machining pulse power.Pass through
Using power discharging device, compared with traditional resistor power supply, power failure rate significantly reduces, and can accomplish substantially non-maintaining.Pass through choosing
With high power device and protection circuit, the reduction of power failure rate can also be made.In addition, controlled in phase by using pulse signal
The ON/OFF of each power discharging device is made, processing electric current can be improved, suitable for utilizing broad-area electrode to workpiece surface
Processing, improve the efficiency of electric machining.
Brief description of the drawings
Fig. 1 shows the circuit diagram of the electrical discharge machining pulse power according to one embodiment of the present utility model.
Fig. 2 shows the electrical discharge machining signal waveform schematic diagram according to one embodiment of the present utility model.
Fig. 3 shows the electrical discharge machining signal waveform schematic diagram according to another embodiment of the present utility model.
Fig. 4 shows the electrical discharge machining signal waveform schematic diagram according to another embodiment of the present utility model.
Fig. 5 shows the electrical discharge machining signal waveform schematic diagram according to another embodiment of the present utility model.
Fig. 6 shows the flow chart of the electric discharge machining method according to one embodiment of the present utility model.
Embodiment
With reference to specific embodiments and the drawings, the utility model is described in further detail, but should not limit this practicality with this
New protection domain.
Fig. 1 shows the circuit diagram of the electrical discharge machining pulse power 100 according to one embodiment of the present utility model.Should
Electrical discharge machining pulse power 100 may include impulse generator 110, the control signal maker 120 for being connected to impulse generator 110,
First power circuit 130, second source circuit 140 and it is connected to the first power circuit 130 and second source circuit 140
Electrode 150.The power supply 100 can also be provided with overvoltage and over-current detector, aerator supervision device, discharging headlamp device etc., these groups
Part is not described in detail in the utility model for clarity.Impulse generator 110 is used to generate start pulse signal CP, with
The first power circuit 130 generation first voltage signal and/or control second source circuit 140 is controlled to generate second voltage signal.
In one example, electrode 150 can use positive polarity to set.Electrode 150 receives first voltage signal and/or second voltage signal
Discharge channel can be formed intermittently to discharge, between electrode 150 and workpiece to produce electric spark, so as to workpiece (for example, gold
Category) carry out machining.Workpiece can be fixed on pedestal or be fixed in processing groove.In one example, can be to processing groove
Working fluid is supplied, processing gap is processed liquid and filled up.Various electricity can be used according to electrical discharge machining pulse power 100 of the present utility model
In spark processing unit (plant).For example, electrical discharge machining pulse power 100 can be the fixation kit in electric discharge machining apparatus.At other
In example, the electrical discharge machining pulse power 100 or the electric discharge machining apparatus comprising the electrical discharge machining pulse power 100 can be hand-held
, it is moveable, and can apply to not need the situation of processing groove/pedestal.
With reference to figure 1, impulse generator 110 can generate start pulse signal CP, and start pulse signal CP is whole for controlling
Individual edm process.For example, when start pulse signal CP is effective, the first power circuit 130, second source circuit 140
It can work and carry out electrical discharge machining to be powered to electrode 150；On the contrary, when start pulse signal CP is invalid, the first power supply electricity
Road 130, second source circuit 140 are stopped, so as to without electrical discharge machining.Start pulse signal CP can be the cycle
The square-wave signal of property, as illustrated in greater detail in Fig. 2-5.Start pulse signal CP pulse width, pulse spacing etc. can be with
It is adjustable.For example, start pulse signal CP can be adjusted in real time according to different machining states.As example rather than limit
Fixed, impulse generator 110 can generate 20us -1000us adjustable start pulse signal CP.
Control signal maker 120 can receive the start pulse signal CP generated by impulse generator 110, and based on triggering
Pulse signal CP generates multiple control wave CP1, CP2, HCP.Specifically, control signal maker 120 may include that CP believes
Number isolation/Shaping Module 122, the first PWM controller 124 and the second PWM controller 126.CP signal isolations/Shaping Module 122
Impulse generator 110 and the signal noise in circuit downstream can be kept apart, and/or start pulse signal CP can be carried out on demand
Filtering or shaping, to reduce noise and generate more accurately impulse waveform.In an alternate embodiment, CP signal isolations/sizing die
Block 122 may reside in impulse generator 110, or can be omitted.
First PWM controller 124 and the second PWM controller 126 can receive to be exported by CP signal isolations/Shaping Module 122
Start pulse signal CP, or not include CP signal isolations/Shaping Module 122 in the case of directly from impulse generator
110 receive start pulse signal CP.First PWM controller 124 be based on start pulse signal CP generate the first pulse signal CP1 and
Second pulse signal CP2, the second PWM controller 126 are based on start pulse signal CP and generate the 3rd pulse signal HCP.
First power circuit 130 may include first voltage source 132, the first power discharging device G1, inductance L, current feedback unit
134th, the second power discharging device G2 and transistor D1-D4.Second source circuit 140 includes the second voltage source 142, resistance R, the
Three power discharging device G3 and transistor D5.First power discharging device G1, the second power discharging device G2, the 3rd power discharging device G3 can distinguish
Control wave CP1, CP2, HCP for being generated by control signal maker 120 is controlled.Specifically, the first pulse signal CP1
To control charging of the first voltage source 132 to inductance L, the second pulse signal CP2 is turned on or off the first power discharging device G1
Or the second power discharging device G2 is turned off to control the first voltage signal from inductance L to electrode 150.3rd pulse signal HCP is turned on
Or the 3rd power discharging device G3 is turned off to control the second voltage signal that second source circuit 140 provides to electrode 150.Current feedback
Device 134 can detect the electric current I that inductance L or the second power discharging device G2 are flowed through during electro-discharge machining, and current detecting is believed
The first PWM controller 124 number is supplied to adjust the first pulse signal CP1 pulsewidth and pulse spacing size, so as to control from
First voltage source 132 is supplied to the size of current of electrode 150 through inductance L and the second power discharging device G2.Inductance L is used to hinder electric current
Change and power discharging device current limliting.In the exemplary embodiment, inductance L can be air core inductor, can reduce magnetic loss, energy-conservation effect
Fruit is more preferable.Power discharging device G1, G2, G3 can be realized using transistor, the brilliant pipe of lock, FET, triode etc..Transistor
D1-D5 can be realized with diode, transistor, FET etc..It will be understood by those skilled in the art that Fig. 1 illustrate only electricity
The exemplary components of spark processing power source 100 and connection, specific implementation can be adjusted under teaching of the present utility model and
The scope of the utility model is not departed from, such as some components (for example, transistor D1-D5) can be omitted or replaced into other and have
The element of identity function, the position of some components can change (for example, the position of current feedback unit 134 can be with inductance L or
Two power discharging device G2 location swap, the position of some components in second source circuit 140 can also exchange).
According in one embodiment of the present utility model, the second voltage source 142 in second source circuit 140 can be
High-voltage DC power supply, when effectively (for example, high level) is make it that the 3rd power discharging device G3 is turned on by the 3rd pulse signal HCP, the
Two voltage sources 142 provide second voltage signal via the 3rd power discharging device G3 to electrode 150, and the second voltage signal can puncture
Discharge channel is simultaneously established in gap between electrode 150 and workpiece.Non-limiting as example, the voltage of the second voltage source 142 can
For 160V-190V.Resistance R is used for the current limliting of power discharging device, and resistance R and the 3rd power discharging device G3 position can exchange.Crystal
Pipe D5 positive terminal is connected with power discharging device G3, and negative pole end is connected with electrode 150, so as to prevent the first power circuit 130
First voltage signal is scurried into second source circuit 140.
In the first power circuit 130, when the first pulse signal CP1 conductings (constant conduction intermittently turns on) first
When power discharging device G1 and the second pulse signal CP2 turn on the second power discharging device G2, first voltage source 132 is via the first amplifirer
Part G1, inductance L and the second power discharging device G2 provide first voltage signal to electrode 150, and the first voltage signal can maintain electricity
Stable discharging passage between pole 150 and workpiece, galvanic corrosion is carried out to workpiece.In addition, turned in the first pulse signal CP1
When, first voltage source 132 charges to inductance L.Non-limiting as example, first voltage source 132 can be low-voltage dc power supply.
For example, the voltage of first voltage source can be 30-90V.In addition, as shown in fig. 1, in inductance L and the negative pole of first voltage source 132
Transistor D3 is connected between (or ground connection), transistor D3 positive terminal is connected with the negative pole of workpiece and first voltage source 132, brilliant
Body pipe D3 negative pole ends are connected with inductance L one end.When the first power discharging device G1 is turned off and the second power discharging device G2 is turned on, transistor
D3 can be used for inhaling negative pressure, be established by transistor D3 via inductance L, the second power discharging device G2 to the continuous current circuit of electrode 150, can
Maintain the discharge channel between electrode 150 and workpiece and fully discharge the energy stored in inductance L.Transistor D1 is set
Between power discharging device G2 and the tie point of electrode 150 and second source circuit 140, the of second source circuit 140 can be prevented
Two voltage signals seal in the first power circuit 130.
In gap is processed (for example, when start pulse signal CP is invalid), the first power discharging device G1, the second power discharging device
G2, the 3rd power discharging device G3 are turned off, and electrode 150 stops producing electric spark.First voltage source 132, transistor D3, inductance L, crystal
Pipe D4 can form freewheeling circuit, to discharge the dump energy in inductance L.In a preferred embodiment, can by from workpiece to
The discharge path (for example, via transistor D2 and optional transistor D1) of electrode 150 is discharged between electrode 150 and workpiece
The dump energy of storage, one end of the discharge path (optionally, are also coupled to ground connection and/or first voltage coupled to workpiece
The negative pole in source 132), the other end of the discharge path is coupling between the second power discharging device G2 and electrode 150.For example, transistor
D2 positive terminal is coupled to workpiece (negative pole for optionally, being also coupled to ground connection and/or first voltage source 132), transistor D2
Negative pole end be coupling between the second power discharging device G2 and electrode 150.By discharged in gap is processed electrode 150 and workpiece it
Between the dump energy that stores, solve the problems, such as current tail, so as to carry out with contributing to electrical discharge machining stability and high efficiency.
According in the first alternative embodiment of the present utility model, signal waveform as shown in Figure 2 can be used.As more than
Described, the first PWM controller 124 is coupled to impulse generator 110 to receive start pulse signal CP, and generates and triggering
The first pulse signal CP1 and the second pulse signal CP2 in pulse signal CP effectual time；Second PWM controller 126 receives
Start pulse signal CP, and generate the 3rd pulse signal HCP in start pulse signal CP effectual time.First pulse is believed
Number CP1 may include the cyclic pulse signal in start pulse signal CP effectual time.For example, the first PWM controller 124
5us -1000us adjustable first start pulse signal CP1 can be produced.In an alternate embodiment, the first pulse signal CP1
Can be identical with start pulse signal CP.Pulse signal CP2, HCP can be identical with start pulse signal CP.In certain situation
Under, directly it can also control the first power discharging device G1, the second work(with the start pulse signal CP generated by impulse generator 110
Device G2, and/or the 3rd power discharging device G3 ON/OFF are put, so as to the first PWM controller 124 and/or the second PWM controller
126 can save.
In operation, with reference to Fig. 1, in start pulse signal CP effectual time (for example, high level), the first pulse letter
The cyclic pulse signal that number CP1 is included periodically on or off the first power discharging device G1 to control first voltage source
132 couples of inductance L charging；Start pulse signal CP2, HCP are effective, therefore the second power discharging device G2 and the 3rd power discharging device G3 are led
Logical, inductance L provides first voltage signal via the second power discharging device G2 to electrode 150, while the second voltage source 142 is via the 3rd
Power discharging device G3 provides second voltage signal to electrode 150.As described above, the second voltage signal can with breakdown electrode 150 with
Discharge channel is simultaneously established in gap between workpiece, so as to first voltage signal and second voltage signal maintain jointly electrode 150 with
Discharge channel between workpiece., can be with when the first power circuit 130 and second source circuit 140 are powered to electrode 150 simultaneously
High processing electric current, such as highest processing electric current are provided up to 200A-600A.Because the first pulse signal CP1 is periodically turned on
Or the first power discharging device G1 is turned off to control charging of the first voltage source 132 to inductance L, therefore led in the first pulse signal CP1
During logical first power discharging device G1, first voltage source 132 charges to inductance L, electric current I increases；In the first pulse signal CP1 shut-offs the
During one power discharging device G1, first voltage source 132 stops charging to inductance L, while inductance L powers to electrode 150, causes electric current I
It is gradually gradually small；To be charged to inductance L when subsequent first pulse signal CP1 turns on the first power discharging device G1 again, electric current I increases,
The rest may be inferred.By adjusting the first pulse signal CP1 pulsewidth and pulse spacing size, the big of electric current I can be efficiently controlled
Small (average value).From figure 2 it can be seen that the second power discharging device G2 electric current I is flowed through in the first power circuit 130 in triggering arteries and veins
Rush in signal CP effectual time and fluctuate.
When start pulse signal CP invalid (for example, low level), the first power discharging device G1, the second power discharging device G2,
Three power discharging device G3 are all turned off, and the first power circuit 130 and second source circuit 140 stop powering to electrode 150, electrode 150
Stop producing electric spark.Thus, start pulse signal CP controls whole edm process, effective in start pulse signal CP
When, the first pulse signal CP1, the second pulse signal CP2 and the 3rd pulse signal HCP can make corresponding power discharging device G1, G2,
G3 conductings carry out electrical discharge machining to be powered to electrode 150.On the contrary, when start pulse signal CP is invalid, power discharging device G1,
G2, G3 are closed, and electrode 150 powers off, so as to without electrical discharge machining.From figure 2 it can be seen that electric current I believes in trigger pulse
Number CP it is invalid when be essentially 0.
According in the second alternative embodiment of the present utility model, signal waveform as shown in Figure 3 can be used.Fig. 3 institutes
The signal waveform shown is similar with the signal waveform shown in Fig. 2, and difference is the first pulse signal CP1 and/or the second pulse
Signal CP2 since the start pulse signal CP effectual time (for example, rising edge) postpone specified time after.3rd arteries and veins
Rush signal HCP and can start (for example, rising edge) relative to start pulse signal CP effectual time and do not postpone, so that the 3rd
Pulse signal HCP starts earlier than the first pulse signal CP1 and/or the second pulse signal CP2.First pulse signal CP1 and second
Pulse signal CP2 can terminate (for example, terminating when start pulse signal CP is changed into invalid) simultaneously with the 3rd pulse signal HCP.
For example, the first PWM controller 124 can receive start pulse signal CP, and in start pulse signal CP effectual time
Start to generate the first pulse signal CP1 and the second pulse signal CP2 after delay specified time；Second PWM controller 126, which receives, to be touched
Pulse signal CP is sent out, and generates the 3rd pulse signal HCP in start pulse signal CP effectual time.Pulse signal HCP
Can be identical with start pulse signal CP.In another optional example, the 3rd pulse signal HCP can also believe relative to trigger pulse
Number CP rising edge is delayed by, but the time quantum that the 3rd pulse signal HCP is delayed by is less than the first pulse signal CP1 and the second arteries and veins
Rush signal CP2 so that the 3rd pulse signal HCP starts earlier than the first pulse signal CP1 and the second pulse signal CP2.As showing
Example and it is non-limiting, the first pulse signal CP1 and the second pulse signal CP2 can be since start pulse signal CP effectual times
(for example, rising edge) starts after playing delay 0-10us.
According in the 3rd alternative embodiment of the present utility model, signal waveform as shown in Figure 4 can be used.Fig. 4 institutes
The signal waveform shown is similar with the signal waveform shown in Fig. 2, and difference is that the 3rd pulse signal HCP is included in trigger pulse
The short pulse at signal CP effectual time beginning.With reference to Fig. 1, the 3rd power discharging device G3 is turned on during the short pulse, and
The short pulse turns off after terminating.Second source circuit 140 during the 3rd power discharging device G3 is turned on breakdown electrode 150 and workpiece it
Between gap and establish discharge channel, subsequent second source circuit 140 is closed, and maintains electrode by the first power circuit 130
Discharge channel between 150 and workpiece.Thus, the ON time of second source circuit 140 can be shorter than start pulse signal CP
Effectual time, so as to save.In addition, by making second source circuit 140 that there is shorter ON time, can effectively control
The electric current put on electrode 150 is made, so as to precisely control electrical discharge machining.
According in the 4th alternative embodiment of the present utility model, signal waveform as shown in Figure 5 can be used.Fig. 5 institutes
The signal waveform shown is similar with the signal waveform shown in Fig. 4, and difference is the first pulse signal CP1 and/or the second pulse
Signal CP2 since the start pulse signal CP effectual time (for example, rising edge) postpone specified time after.3rd arteries and veins
Rush signal HCP and can start (for example, rising edge) relative to start pulse signal CP effectual time and do not postpone, so that the 3rd
Pulse signal HCP starts earlier than the first pulse signal CP1 and the second pulse signal CP2, and earlier than the first pulse signal CP1 and
Second pulse signal CP2 terminates.It should be noted that in order to maintain the electric discharge between electrode 150 and workpiece to lead to by the first power circuit 130
Road, the 3rd pulse signal HCP should just be closed after the first pulse signal CP1 and the second pulse signal CP2 start.Another
In optional example, the 3rd pulse signal HCP can be also delayed by relative to start pulse signal CP rising edge, but the 3rd pulse is believed
The time quantum that number HCP is delayed by is less than the time quantum that the first pulse signal CP1 and the second pulse signal CP2 are delayed by so that the
Three pulse signal HCP start earlier than the first pulse signal CP1 and the second pulse signal CP2.It is non-limiting as example, the first arteries and veins
Rush signal CP1 and the second pulse signal CP2 can since the start pulse signal CP effectual time (for example, rising edge) postpone
Start after 0-10us.
Fig. 6 shows the electrical discharge machining pulse power control method according to the embodiment of the utility model one.This method can be by such as
Electrical discharge machining pulse power 100 described by upper reference picture 1 performs.
This method may include, in step 610, to generate start pulse signal.Referring for example to Fig. 1, impulse generator 110 can give birth to
Into start pulse signal CP.Non-limiting as example, start pulse signal CP can touch for the adjustable of 20us -1000us
Send out pulse signal.
This method may additionally include step 620, be generated using the first power circuit under the control of the start pulse signal
First voltage signal.For example, the first power discharging device G1 and the second power discharging device G2 in the first power circuit 130 can be in triggering arteries and veins
Rush on or off under signal CP control.
This method may additionally include step 630, be generated using second source circuit under the control of the start pulse signal
Second voltage signal.For example, the 3rd power discharging device G3 in second source circuit 140 can be under start pulse signal CP control
On or off.
This method may additionally include step 640, and first voltage signal and/or second voltage signal are applied to electrode with shape
Into spark discharge.For example, in the case where the second power discharging device G2 is turned on, the first power circuit 130 can provide the to electrode 150
One voltage signal；In the case where the 3rd power discharging device G3 is turned on, second source circuit 140 can provide the second electricity to electrode 150
Press signal.
In one embodiment, the electrical discharge machining pulse power control method may also include：Generation is in the start pulse signal
The first pulse signal CP1 and the second pulse signal CP2 in CP effectual time；Using the first pulse signal CP1 turning on or
The first power discharging device G1 is turned off to control charging of the first voltage source 132 to inductance L；And come using the second pulse signal CP2
On or off the second power discharging device G2 is to control the first voltage signal from inductance L to electrode 150.
In addition, the electrical discharge machining pulse power control method may also include：Inductance L is detected to the electric current and basis of electrode 150
Current detection signal adjusts the first pulse signal CP1 pulsewidth and pulse spacing size.
In the exemplary embodiment, the first pulse signal CP1 may include the week in start pulse signal CP effectual time
Phase property pulse signal, the cyclic pulse signal on or off the first power discharging device G1 is to control first voltage source 132 to electricity
Feel L charging.In an alternative embodiment, the first pulse signal CP1 and the second pulse signal CP2 can be from start pulse signal CP's
Effectual time has started to start after postponing specified time.For example, the first pulse signal CP1 and the second pulse signal CP2 can from touch
Hair pulse signal CP effectual time has started to start after postponing 0-10us.
The electrical discharge machining pulse power control method may also include：Generation in start pulse signal CP effectual time the
Three pulse signal HCP are with the power discharging device G3 of on or off the 3rd.For example, the 3rd pulse signal HCP can be used to turn on the 3rd work(
Device G3 is put to provide second voltage signal from the second voltage source 142 to electrode 150, so as between breakdown electrode 150 and workpiece
Gap and establish discharge channel.In an alternative embodiment, the 3rd pulse signal HCP may include having in start pulse signal CP
The short pulse at period beginning is imitated, the 3rd power discharging device G3 is turned on during the short pulse, and is turned off after the short pulse terminates.
In another embodiment, the second pulse signal CP2 and the 3rd pulse signal HCP effectual time can terminate simultaneously.On the one hand,
The voltage of the second voltage source 142 can be higher than the voltage of first voltage source 132.For example, the voltage of first voltage source 132 can be 30-
90V, the voltage of the second voltage source 142 is 160V-190V.
As above, the utility model provides a kind of new electrical discharge machining pulse power and processing unit (plant).The utility model passes through
First power circuit 130 and second source circuit 140 are used cooperatively, it is possible to increase the energy utilization of electrical discharge machining pulse power
Rate.For example, the capacity usage ratio of electrical discharge machining pulse power of the present utility model can reach 80%, with some existing electrical spark workings
Work power supply is compared to can improve more than 50%, so as to economize on electricity 50%.By using power discharging device, compared with traditional resistor power supply, electricity
Source fault rate significantly reduces, and can accomplish substantially non-maintaining.By selecting high power device and protection circuit, electricity can also be made
Source fault rate reduces.In addition, controlling the ON/OFF of each power discharging device in phase by using pulse signal, can make to add
Work electric current reaches 200A-600A, suitable for utilizing processing of the broad-area electrode to workpiece surface, improves the efficiency of electric machining.
Embodiment of the present utility model is described above in conjunction with accompanying drawing, but the utility model is not limited to
The embodiment stated, above-mentioned embodiment and cited specific numeral are only schematical, rather than
Restricted, one of ordinary skill in the art is not departing from the utility model aims and power under enlightenment of the present utility model
Profit is required under protected ambit, can also make many forms, these are belonged within the scope of protection of the utility model.
Claims (10)
- A kind of 1. electrical discharge machining pulse power, it is characterised in that including：Impulse generator, the impulse generator generate start pulse signal；First power circuit, first power circuit generate first voltage signal under the control of the start pulse signal；Second source circuit, the second source circuit generate second voltage signal under the control of the start pulse signal； AndElectrode, the electrode are believed coupled to first power circuit and the second source circuit with receiving the first voltage Number and/or the second voltage signal form spark discharge.
- 2. electrical discharge machining pulse power as claimed in claim 1, it is characterised in that first power circuit includes first voltage Source, the first power discharging device coupled to the first voltage source, the inductance coupled to first power discharging device and it is coupling in The second power discharging device between the inductance and the electrode, wherein the electrical discharge machining pulse power also includes：First PWM controller, first PWM controller are believed coupled to the impulse generator with receiving the trigger pulse Number, and the first pulse signal and the second pulse signal in the effectual time of the start pulse signal are generated, described first First power discharging device described in pulse signal on or off is and described to control charging of the first voltage source to the inductance Second power discharging device described in second pulse signal on or off with control from the inductance to the electrode it is described first electricity Press signal.
- 3. electrical discharge machining pulse power as claimed in claim 2, it is characterised in that first power circuit also includes：Current feedback unit, the current feedback unit detect the inductance to the electric current of the electrode and by current detection signals First PWM controller is supplied to adjust the pulsewidth of first pulse signal and pulse spacing size.
- 4. electrical discharge machining pulse power as claimed in claim 2, it is characterised in that first pulse signal is included in described touch Send out the cyclic pulse signal in the effectual time of pulse signal, the first work(described in the cyclic pulse signal on or off Device is put to control charging of the first voltage source to the inductance,Wherein described first pulse signal and second pulse signal start the effectual time than the start pulse signal Start postpone specified time.
- 5. electrical discharge machining pulse power as claimed in claim 4, it is characterised in that first pulse signal and second arteries and veins That rushes the effectual time started than the start pulse signal of signal starts delay 0-10us.
- 6. electrical discharge machining pulse power as claimed in claim 2, it is characterised in that first power circuit also includes：It is described from workpiece to the discharge path of the electrode to discharge the dump energy stored between the electrode and the workpiece One end of discharge path is coupled to the workpiece, the other end of the discharge path be coupling in second power discharging device with it is described Between electrode.
- 7. electrical discharge machining pulse power as claimed in claim 6, it is characterised in that the discharge path includes：Transistor, the positive terminal of the transistor are coupled to the workpiece, and the negative pole end of the transistor is coupling in described second Between power discharging device and the electrode.
- 8. the electrical discharge machining pulse power as any one of claim 2 to 7, it is characterised in that the second source circuit Including：The second voltage source；AndThe 3rd power discharging device being coupling between the second voltage source and the electrode, wherein the second voltage source is via institute State the 3rd power discharging device and provide the second voltage signal to the electrode,Wherein described electrical discharge machining pulse power also includes：Second PWM controller, second PWM controller are believed coupled to the impulse generator with receiving the trigger pulse Number, and the 3rd pulse signal in the effectual time of the start pulse signal is generated with the 3rd power amplifier described on or off Device,Wherein described 3rd pulse signal turns on the 3rd power discharging device with from the second voltage source to the electricity when effective Pole provides the second voltage signal, so as to puncture the gap between the electrode and workpiece and establish discharge channel,The effectual time of wherein described second pulse signal and the 3rd pulse signal terminates simultaneously, or the 3rd pulse Signal is included in the short pulse at the effectual time beginning of the start pulse signal, and the 3rd power discharging device is in the short arteries and veins Turn on during punching, and turned off after the short pulse terminates.
- 9. electrical discharge machining pulse power as claimed in claim 8, it is characterised in that the start pulse signal be 20us- 1000us adjustable start pulse signal, the voltage of the first voltage source are 30-90V, the voltage of the second voltage source For 160V-190V.
- A kind of 10. electric discharge machining apparatus, it is characterised in that including：Electrical discharge machining pulse power as claimed in any one of claims 1-9 wherein；AndProcessing groove, the processing groove are used to fix workpiece and the shape between the electrode of the workpiece and the electrical discharge machining pulse power Into gap.
Applications Claiming Priority (2)
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| CN2016107819323 | 2016-08-31 | ||
| CN201610781932 | 2016-08-31 |
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| CN201720243981.1U Active CN207026652U (en) | 2016-08-31 | 2017-03-13 | Electrical discharge machining pulse power and processing unit (plant) |
| CN201710147086.4A Active CN107775126B (en) | 2016-08-31 | 2017-03-13 | Electrical discharge machining pulse power and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388079A (en) * | 2020-11-19 | 2021-02-23 | 西安理工大学 | Composite pulse working method of wire cut electrical discharge machining pulse power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112828403B (en) * | 2020-12-30 | 2022-05-03 | 山东豪迈机械科技股份有限公司 | Electric spark machining discharge state detection circuit and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6339725A (en) * | 1986-08-04 | 1988-02-20 | Inoue Japax Res Inc | Electric discharge machining device |
| JPS6339731A (en) * | 1986-08-05 | 1988-02-20 | Mitsubishi Electric Corp | Wire electric spark machining device |
| JP2983139B2 (en) * | 1994-04-26 | 1999-11-29 | 株式会社ソディック | Power supply circuit for electric discharge machining and electric discharge machine |
| CN1069856C (en) * | 1998-05-08 | 2001-08-22 | 财团法人工业技术研究院 | Method and apparatus for control of wire-electrode discharge cutting |
| CN100357053C (en) * | 2005-10-24 | 2007-12-26 | 中国石油大学(华东) | Voltage-regulating energy saving spark machining pulse power supply |
| JP5031073B2 (en) * | 2010-07-21 | 2012-09-19 | 株式会社ソディック | Power supply device for wire cut electrical discharge machine |
| JP5414864B1 (en) * | 2012-09-18 | 2014-02-12 | 株式会社ソディック | Machining power supply for wire-cut electrical discharge machining equipment |
| CN106964853B (en) * | 2017-03-06 | 2018-11-20 | 浙江师范大学 | A kind of composite pulse power supply for electro-discharge machining |
-
2017
- 2017-03-13 CN CN201720243981.1U patent/CN207026652U/en active Active
- 2017-03-13 CN CN201710147086.4A patent/CN107775126B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388079A (en) * | 2020-11-19 | 2021-02-23 | 西安理工大学 | Composite pulse working method of wire cut electrical discharge machining pulse power supply |
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| Publication number | Publication date |
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| CN107775126B (en) | 2019-09-24 |
| CN107775126A (en) | 2018-03-09 |
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