CN101282812A - Discharging processor for line electrode - Google Patents

Discharging processor for line electrode Download PDF

Info

Publication number
CN101282812A
CN101282812A CN200680011788.XA CN200680011788A CN101282812A CN 101282812 A CN101282812 A CN 101282812A CN 200680011788 A CN200680011788 A CN 200680011788A CN 101282812 A CN101282812 A CN 101282812A
Authority
CN
China
Prior art keywords
aforementioned
power supply
line electrode
machined object
upside
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN200680011788.XA
Other languages
Chinese (zh)
Other versions
CN101282812B (en
Inventor
小野寺康雄
佐藤达志
鹈饲佳和
桥本隆
服部广一郎
山田久
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CN101282812A publication Critical patent/CN101282812A/en
Application granted granted Critical
Publication of CN101282812B publication Critical patent/CN101282812B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

A wire discharge processing machine performs a feeding control in such a manner that there are mixed, during a discharge processing, an upper side feeding state in which a high frequency pulse voltage is applied to a wire electrode only from an upper feeding part disposed above a processed subject, a lower side feeding state in which a high frequency pulse voltage is applied to the wire electrode only from a lower feeding part disposed beneath the processed subject and a two-side feeding state in which the high frequency pulse voltages are synchronously applied to the wire electrode from both the upper and lower feeding parts, thereby suppressing the short-circuiting between the wire electrode and the processed subject and also suppressing the wire brakes, thereby facilitating the improvement of productivity.

Description

Discharging processor for line electrode
Technical field
The present invention relates to a kind of discharging processor for line electrode, it produces discharge between line electrode and machined object, machined object is processed into the regulation shape.
Background technology
In discharging processor for line electrode, apply high-frequency pulse voltage to line electrode, utilize the discharge that between line electrode and machined object, produces this moment, remove machined object slightly at every turn, this machined object is processed into the regulation shape.Line electrode utilizes a pair of up and down line electrode guide rail to prescribed direction, the guiding of for example vertical direction on one side, Yi Bian move in the direction, around this line electrode, supplies with working fluid in the process of processing machined object.For example, Yi Bian can the workbench of mounting machined object be moved to prescribed direction,, machined object be carried out Precision Machining Yi Bian produce above-mentioned discharge by utilizing Numerical Control.
In order to utilize line electrode discharge processing precise and stably to process machined object, while interval between line electrode and machined object being dropped on being processed in the prescribed limit is very important, if line electrode and machined object short circuit be not then because can produce discharge, so processing stops.In addition, between line electrode and machined object, stockpile machining chips etc., can cause concentrate (hereinafter referred to as " concentrating discharge ") of discharge,, the broken string (hereinafter referred to as " line electrode broken string ") of line electrode usually occurs as the local excessive result of discharge energy.If produce the line electrode broken string, then must make line electrode again by the guiding of line electrode guide portion, so productivity significantly reduces.Therefore, the technology of various prevention line electrode broken strings is proposed.
For example, in patent documentation 1, put down in writing a kind of electric discharge device, it is in the above and below of machined object, be provided with and be used for more than 2 or 2 from the energising terminal of processing power source to the wire electrode supply pulse voltage, simultaneously between each energising terminal and processing power source, the energising change-over switch is set, whenever from processing power source when 1 energising terminal applies continuous a plurality of pulse voltage, the above-mentioned energising change-over switch of switching controls.In this electric discharge device, because the discharge position between line electrode and machined object periodically moves up and down, so even by big electric current, the heating of line electrode also is suppressed, and, point of discharge between line electrode and machined object also disperses, and therefore can prevent the line electrode broken string.
In addition, in patent documentation 2, put down in writing a kind of line cutting electric discharge device, it is at the upside and the downside of machined object, be provided for energising part to wire electrode supply processing pulse, simultaneously respectively between upside energising part and machined object, and between downside energising part and the machined object, the processing pulse power is set separately.In this line cutting electric discharge device, from upside energising part and downside energising part, make pulse current non-synchronously flow through line electrode by respectively, prevent concentrating of point of discharge, as its result, prevent the line electrode broken string.
In addition, in patent documentation 3, put down in writing a kind of electric discharge device, it is in the mode at the machining area two ends that are positioned at machined object (processing sheet), along line electrode 2 contacts are set, according to the discharge position between line electrode and machined object, some or two the supply processing electric currents in 2 contacts.In this discharge of electricity processing unit (plant), by changing the contact that should supply with processing electric current, prevent by the local heat of concentrating discharge to cause according to discharge position, as its result, prevent the line electrode broken string.
Patent documentation 1: the spy opens clear 59-47123 communique
Patent documentation 2: the spy opens flat 1-97525 communique
Patent documentation 3: special fair 6-61663 communique
Summary of the invention
The various discharge of electricity processing unit (plant)s of record in the patent documentation 1～3, all be to be used to prevent the line electrode broken string and the raising productivity, but, wish when preventing the line electrode broken string, to prevent the short circuit between line electrode and machined object in order to improve the productivity in the line electrode discharge processing.According to the present inventor's etc. experiment, as long as via the energising terminal of the top that is disposed at machined object, and be disposed in the energising terminal of below any, apply the voltage of several pulses to line electrode, all may produce above-mentioned short circuit.
Therefore, only, alternatively carry out powering to line electrode, or power to line electrode, can't suppress above-mentioned short circuit effectively from the opposing party's power supply terminal from a side power supply terminal by mode with the discharge of electricity processing unit (plant) of record in the patent documentation 1.The mode of the line of record cutting electric discharge device in patent documentation 2, power to line electrode from a side power supply terminal non-synchronously carrying out, with from the opposing party's power supply terminal under the situation of line electrode power supply, perhaps, the mode of the discharge of electricity processing unit (plant) of record in patent documentation 3, according to discharge position, change is powered to line electrode from a side power supply terminal, with from the opposing party's power supply terminal under the situation of line electrode power supply, all be in the same manner, in these power supply modes, can't suppress above-mentioned short circuit effectively.Because if line electrode and machined object short circuit then can not produce discharge, so discharge processing itself is stagnated, average process velocity reduces.
The present invention In view of the foregoing proposes, and its purpose is to obtain a kind of discharging processor for line electrode, and it suppresses the short circuit between line electrode and machined object respectively, and the line electrode broken string, is easy to improve productivity.
Realize the discharging processor for line electrode of the present invention of above-mentioned purpose, it on one side supplies with working fluid between line electrode that the thickness of slab direction at machined object moves and aforementioned machined object, on one side via a pair of power supply of configuration up and down at aforementioned machined object, apply high-frequency pulse voltage to aforementioned line electrode, the discharge that utilization produces between aforementioned line electrode and aforementioned machined object, aforementioned machined object is processed, it is characterized in that, have: main power source, it is via the 1st switch element portion, the upside power supply that is disposed at aforementioned machined object upside in aforementioned a pair of power supply applies high-frequency pulse voltage, and, apply high-frequency pulse voltage to the downside power supply that is disposed at aforementioned machined object downside via the 2nd switch element portion; The 1st pulse oscillator, it supplies with the pulse signal of the on-off action that is used to the 1st switch element portion that controls to aforementioned the 1st switch element portion; The 2nd pulse oscillator, it supplies with the pulse signal of the on-off action that is used to the 2nd switch element portion that controls to aforementioned the 2nd switch element portion; Storage part, its storage power supply control data, this power supply control data is stipulated the on-off action separately of aforementioned the 1st switch element portion and aforementioned the 2nd switch element portion, the control so that the mode that following state mixes is powered: the upside power supply state, it only applies high-frequency pulse voltage by aforementioned upside power supply to aforementioned line electrode; The downside power supply state, it only applies high-frequency pulse voltage by aforementioned downside power supply to aforementioned line electrode; And the both sides power supply state, its by aforementioned upside power supply and aforementioned downside power supply the two, apply high-frequency pulse voltage to aforementioned line electrode synchronously with one another; And the impulse hunting control part, it controls aforementioned the 1st pulse oscillator and the action separately of aforementioned the 2nd pulse oscillator according to aforementioned power supply control data.
The effect of invention
When above-mentioned upside power supply state or downside power supply state, be easy to generate the short circuit between line electrode and machined object, but, if this upside power supply state and downside power supply state are alternatively occurred, then because the position of the point of discharge between line electrode and machined object, thickness of slab direction (thickness direction) at machined object changes, so can suppress to concentrate the generation of discharge, prevents the line electrode broken string.In addition, when the power supply state of both sides, because the discharge stability between line electrode and machined object, so, can prevent the short circuit between line electrode and machined object.
In discharging processor for line electrode of the present invention, because the impulse hunting control part is according to the power supply control data, control the action of the 1st pulse oscillator and the 2nd pulse oscillator respectively, so during discharge processing, can make upside power supply state, downside power supply state and both sides power supply state, mix in any way.By the corresponding suitable power supply control datas such as electric discharge machining conditions that utilize for example experiment to try to achieve and be scheduled in advance, and be stored in the storage part, can suppress short circuit and line electrode broken string between line electrode and machined object respectively.Therefore, improve productivity easily.
Description of drawings
Fig. 1 is a structure chart of roughly representing an example of discharging processor for line electrode of the present invention.
Fig. 2 represents by the waveform of each pulse oscillator shown in Figure 1 to the pulse signal of the 1st switch element portion or the supply of the 2nd switch element portion, and the skeleton diagram of the relation between the power supply state of line electrode.
Fig. 3 roughly is illustrated in the discharging processor for line electrode of the present invention, and main power source has the structure chart of an example of the device of the 1st main power source and the 2nd main power source.
Fig. 4 is the discharge position when roughly representing to make discharging processor for line electrode shown in Figure 3 be the both sides power supply state and the curve map of the relation between discharge current value.
Fig. 5 roughly is illustrated in the discharging processor for line electrode of the present invention, the structure chart of an example of the device of the line electrode broken string that can prevent to be caused by the impedance deviation between power supply circuits.
Fig. 6 roughly is illustrated in the discharging processor for line electrode of the present invention, the structure chart of another example of the device of the line electrode broken string that can prevent to be caused by the impedance deviation between power supply circuits.
Fig. 7 roughly is illustrated in the discharging processor for line electrode of the present invention, the structure chart of another example of the device of the line electrode broken string that can prevent to be caused by the impedance deviation between power supply circuits.
Fig. 8 roughly is illustrated in the discharging processor for line electrode of the present invention, can be according to the impedance of the power supply circuits separately of upside and downside itself, regulate structure chart to an example of the supply conditions of the high-frequency pulse voltage of each power supply circuits.
Fig. 9 roughly is illustrated in the discharging processor for line electrode of the present invention, can be according to the impedance of the power supply circuits separately of upside and downside itself, regulate structure chart to another example of the supply conditions of the high-frequency pulse voltage of each power supply circuits.
Figure 10 roughly is illustrated in the discharging processor for line electrode of the present invention, increases the structure chart of an example that the line electrode broken string is avoided the device of function.
Figure 11 is illustrated in the impulse hunting control part of discharging processor for line electrode shown in Figure 10, the skeleton diagram of an example of the powering mode when increasing power supply ratio restore funcitons.
Figure 12 roughly is illustrated in the discharging processor for line electrode of the present invention, increases the structure chart that short circuit prevents an example of function.
Figure 13 roughly represents in the discharging processor for line electrode of the present invention, increase basis from the working fluid feedway, upwards side nozzle and the flow of the working fluid supplied with of side nozzle are down respectively controlled the structure chart of an example of device of function of the action of the 1st pulse oscillator and the 2nd pulse oscillator respectively.
Figure 14 roughly represents in the discharging processor for line electrode of this nozzle, being provided with in control device will be from the form of expression of upside power supply state, downside power supply state and the both sides power supply state of input part input, is transformed to the structure chart of an example of device of the data transformation component of power supply control data.
Figure 15 roughly is illustrated in the discharging processor for line electrode of the present invention, a power supply only is provided with the structure chart of an example of a switch element portion.
The specific embodiment
Below, with reference to accompanying drawing, be elaborated for the embodiment of discharging processor for line electrode of the present invention.In addition, the present invention is not limited to the embodiment of following explanation.
Embodiment 1.
Fig. 1 is a structure chart of roughly representing an example of discharging processor for line electrode of the present invention.Discharging processor for line electrode 130 shown in this Fig has: processing machine main body 80, and it is processed into machined object W discharge by Numerical Control the shape of regulation; Control device 110, Numerical Control is carried out in its action to this processing machine main body 80; Input part 115, it is connected with control device 100 by wired or wireless, to these control device 100 input commands or data etc.; And display part 120, it shows to the operation conditions of the order of control device 110 inputs or data etc. or processing machine main body 80 etc.
Above-mentioned processing machine main body 80, the line electrode 1 that moves to the thickness of slab direction along machined object W applies high-frequency pulse voltage, utilizes the discharge that produces between line electrode 1 and machined object W, and W processes to machined object.Machined object W mounting is in can be on the workbench 5 that X-Y plane (horizontal plane) go up to move, and line electrode 1 is being applied under the state of tension force, moves in the mode of the thickness of slab direction of crossing machined object W.
For line electrode 1 is moved along prescribed direction, above workbench 5, layout line electrode bobbin 10, idler roller 12a, guide roller 14a and line electrode guide portion 16a, below workbench 5, layout line electrode guide portion 16b, guide roller 14b and idler roller 12g.The line electrode 1 that is wrapped on the line electrode bobbin 10 is pulled out by idler roller 12a, by guide roller 14a, line electrode guide portion 16a, line electrode guide portion 16b and guide roller 14b after vertical direction guiding, the roller 12b drawing that is tensioned is recovered to line electrode and reclaims with in the case 18.The pull speed of the line electrode 1 that is undertaken by idler roller 12b, be set at faster than the pull speed of the line electrode 1 that is undertaken by idler roller 12a, its result, line electrode 1 is applying under the state of tension force, moves in the direction mode of crossing machined object W thickness of slab.
In addition, in order to apply high-frequency pulse voltage to line electrode 1, a pair of power supply 20a, 20b are in the separate configuration up and down of workbench 5.Be configured in the power supply 20a (hereinafter referred to as " upside power supply 20a ") of workbench 5 tops, be positioned at the top of line electrode guide portion 16a, be configured in the power supply 20b (below, be called " downside power supply 20b ") of the below of workbench 5, be configured in the below of line electrode guide portion 16b.And, on upside power supply 20, connect the 1st 25a of switch element portion that has a switch element at least, on the 1st 25a of switch element portion, connect main power source 30 and the 1st pulse oscillator 35a.In addition, on downside power supply 20b, connect the 2nd 25b of switch element portion that has a switch element at least, on the 2nd 25b of switch element portion, connect main power source 30 and the 2nd pulse oscillator 35b.Main power source 30 also is connected with the thickness of slab direction central portion of machined object W.
Above-mentioned main power source 30, when it moves, respectively the voltage of prescribed level is supplied with to the 1st 25a of switch element portion and the 2nd 25b of switch element portion, the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b supply with the pulse signal of the on-off action that is used to control the 25a of this switch element portion, 25b to the 1st 25a of switch element portion or the 2nd 25b of switch element portion.By control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively by impulse hunting control part 95 described later, each 25a of switch element portion, 25b are opened and closed with the pattern of regulation, thereby can apply above-mentioned high-frequency pulse voltage to line electrode 1 from upside power supply 20a or downside power supply 20b, perhaps the two applies above-mentioned high-frequency pulse voltage to line electrode 1 from upside power supply 20a and downside power supply 20b.
In addition, add man-hour in beginning or the discharge that restarts machined object W, at first, whether fall into for the gap between detection line electrode 1 and machined object W in the width of regulation etc., supply with lower pulse voltage via the 3rd 45a of switch element portion to upside power supply 20a from accessory power supply 40, supply with lower pulse voltage via the 4th 45b of switch element portion to downside power supply 20b simultaneously.At this moment, each the 3rd 45a of switch element portion and the 4th 45b of switch element portion are closed synchronously with one another.And, the potential difference of utilizing voltage check device 50 to detect between each power supply 20a, 20b and machined object W, when this testing result was in the prescribed limit, main power source 30 began action.On the other hand, when above-mentioned testing result does not fall in the prescribed limit, move, regulate the width in the gap of 1 of machined object W and line electrode by making workbench 5.For workbench 5 is moved, on this workbench 5, connect drive unit 55.This Working table driving device 55 also can make workbench 5 move to prescribed direction during processing that machined object W is discharged.And, workbench 5 has linear encoder or rotary encoder uniform velocity sensor (not shown), according to the testing result of this velocity sensor, the actuating speed of velocity measuring device (not shown) surveying work platform 5 is sent to s operation control described later portion 90 with measurement result.
In addition, add line electrode 1 overheated in man-hour in order to suppress machined object W discharge, prevent the broken string of this line electrode 1, add man-hour in the discharge of machined object W, via last side nozzle 65a and following side nozzle 65b, between machined object W and line electrode 1, supply with working fluid from working fluid feedway 60.Last side nozzle 65a is configured in the top of machined object W, and following side nozzle 65b is configured in the below of machined object W.Working fluid feedway 60 has respectively the quantity delivered (flow) of measuring the working fluid of side nozzle 65a upwards and the flow measurement function of the working fluid quantity delivered (flow) of side nozzle 65b downwards.
On the other hand, the control device 110 of the action of control processing machine main body 80 has storage part 85, s operation control portion 90, impulse hunting control part 95.
In above-mentioned storage part 85, be stored in the Numerical Control data of using in the action control of Working table driving device 55 or working fluid apparatus for controlling of supply 60 etc., simultaneously the on-off action separately of store predetermined the 1st 25a of switch element portion and the 2nd 25b of switch element portion and control power supply control data to the mode of line electrode 1 power supply.This power supply control data is set at, make under the electric discharge machining conditions of standard, can prevent short circuit or line electrode broken string between line electrode 1 and machined object W, this power supply control data contains: the data that the 1st 25a of switch element portion is opened and closed; The data that the 2nd 25b of switch element portion is opened and closed; And the data that each the 1st 25a of switch element portion and the 2nd switch 25b are opened and closed synchronously with one another.
Be stored in power supply control data in the storage part 85 and can have only a kind ofly,, also can be and every kind of multiple power supply control data that product is corresponding inferring or predeterminedly making under the situation of multiple products by discharging processor for line electrode 130.
S operation control portion 90 when the instruction that begins from input part 115 input indication discharging processor for line electrode described later 130 operations, at first makes accessory power supply 40 startings.Then, judge whether the testing result of voltage check device 50 falls in the scope of regulation, when in the scope that falls into regulation, make main power source 30 startings.Then, according to the Numerical Control data that are stored in the storage part 85, the action of control Working table driving device 55 and working fluid feedway 60 etc.Discharge at machined object W adds man-hour, according to the Numerical Control data, the action of control Working table driving device 55 makes workbench 5 move to prescribed direction, according to the Numerical Control data, supply with the working fluid of regulation flow respectively to each nozzle 65a, 65b by working fluid feedway 60 simultaneously.
In addition, s operation control portion 90 is according to the testing result of the potential difference that is obtained by voltage check device 50, obtain the energy of the high-frequency pulse voltage that applies to machined object W from line electrode 1, according to the actuating speed of the workbench 5 that obtains by aforementioned velocity measuring device, obtain process velocity simultaneously.Then,, calculate the thickness of slab of machined object W successively, from above-mentioned Numerical Control data, read the control data corresponding, the energy of the high-frequency pulse voltage that FEEDBACK CONTROL applies to line electrode 1 with this thickness of slab according to the energy of above-mentioned high-frequency pulse voltage and process velocity etc.Specifically, the pulse spacing of the high-frequency pulse voltage that applies of FEEDBACK CONTROL.And the action of this s operation control portion 90 control display parts 120 will be to the order of control device 110 inputs or data etc., and perhaps the operation conditions of processing machine main body 80 etc. is presented on the display part 120.
Impulse hunting control part 95 begins action under the control of s operation control portion 95, read the power supply control data of the regulation that is stored in the storage part 85, according to this power supply control data, controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.Under the situation of the multiple power supply control data of storage, the user specifies desired power supply control data in the discharge first being processed of machined object W by input part 115 in storage part 85.At this moment, the power supply control data that is stored in the storage part 85 is presented on the display part 120, so that the user selects desired power supply control data.
In the power supply control data that impulse hunting control part 95 is read, as mentioned above, contain: the data that the 1st 25a of switch element portion is opened and closed; The data that the 2nd switch portion 25b is opened and closed; And the data that each the 1st switch element 25a of portion and the 2nd switch 25b are opened and closed synchronously with one another.Therefore, during processing that machined object W is discharged, following state is mixed with the pattern of stipulating: the upside power supply state, it only applies high-frequency pulse voltage by upside power supply 20a to line electrode 1; The downside power supply state, it only applies high-frequency pulse voltage by downside power supply 20b to line electrode 1; And the both sides power supply state, the two applies high-frequency pulse voltage to line electrode 1 by upside power supply 20a and downside power supply 20b for it.
Fig. 2 represents by each pulse oscillator 35a, 35b to the waveform of the pulse signal of the 1st 25a of switch element portion or the 2nd 25b of switch element portion supply and the skeleton diagram of the relation between the state of line electrode 1 power supply.
As shown in the drawing, from the pulse signal of the 1st pulse oscillator 35a to the 1st 25a of switch element portion supply, it is the impulse waveform that low level L and high level H are repeated with specified period, when the pulse signal of being supplied with to the 2nd 25b of switch element portion by the 2nd switch element 35b is low level L state, result as the 1st 25a of switch element portion is opened and closed becomes upside power supply state UF.Otherwise, be under the state of low level L by the 1st pulse oscillator 35a to the pulse signal that the 1st 25a of switch element portion supplies with, the pulse signal of being supplied with to the 2nd 25b of switch element portion by the 2nd pulse oscillator 35b is when making low level L and high level H with the waveform of specified period repetition, because the 2nd 25b of switch element portion is opened and closed, so become downside power supply state LF.And, when the pulse signal of supplying with to the 1st 25a of switch element portion by the 1st pulse oscillator 35a, with the pulse signal of supplying with the 2nd 25b of switch element portion by the 2nd pulse oscillator 35, during for impulse waveform synchronized with each other, because the 1st 25a of switch element portion and the 2nd 25b of switch element portion open and close synchronously with one another, so become both sides power supply state BF.
The present inventor etc. learn by experiment, the difficulty or ease that the generation frequency of the short circuit between line electrode 1 and machined object W and line electrode broken string produce, though with the liquid matter of the material of line electrode 1 or line electrode diameter, employed working fluid or from the material of the quantity delivered of the working fluid of each nozzle 65a, 65b, machined object W or wish that the processing conditions such as shape of the product made by this machined object W change, if but so that the cycle of weak point is switched above-mentioned various power supply state, short circuit will frequently produce, and process velocity is difficult for improving.In addition, also learn by experiment,, then cause the line electrode broken string easily if the number of pulses under the various power supply state is too much.
For example, make under the upside power supply state to the umber of pulse of the umber of pulse of the high-frequency pulse voltage that line electrode 1 applies and the high-frequency pulse voltage that under the downside power supply state, applies to line electrode 1 and, with under the power supply state of both sides under the identical situation of the umber of pulse of the high-frequency pulse voltage that line electrode 1 applies, if make the umber of pulse under the various power supply states be lower than 3, then line electrode 1 frequently produces with the short circuit meeting of machined object W, and process velocity significantly reduces.In addition, if make umber of pulse under the various power supply states more than or equal to 10000, then the position of the point of discharge between line electrode 1 and machined object W can not disperse to a certain extent in the thickness of slab direction of machined object W, causes the line electrode broken string easily.
And, the present inventor etc. learn by experiment, and are very few if the umber of pulse under the power supply state of both sides accounts for the ratio of the umber of pulse that applies to line electrode 1, then the increase frequency that produces of the short circuit between line electrode 1 and machined object W, if too much, then cause the line electrode broken string easily.For example, if aforementioned proportion less than 50% then causes short circuit easily,, then cause the line electrode broken string easily if more than or equal to 95%.
Consider above situation as can be known, short circuit between line electrode 1 and machined object W and line electrode broken string can suppress by upside power supply state, downside power supply state and both sides power supply state are suitably mixed.
In above-mentioned discharging processor for line electrode 130, according to the aforementioned power supply control data that is stored in the storage part 85, impulse hunting control part 95 is controlled the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, its result, with the mode that pattern according to the rules mixes upside power supply state, downside power supply state and both sides power supply state, the control of powering.Therefore, can suppress short circuit and line electrode broken string between line electrode 1 and machined object W respectively by obtaining suitable power supply control data by experiment and being stored in advance in the storage part 85.Therefore, improve the productivity of discharging processor for line electrode 130 easily.
Embodiment 2.
In discharging processor for line electrode of the present invention, overheated for the line electrode of the thickness of slab direction central portion that suppresses machined object can be divided into main power source the 1st main power source and these two parts of the 2nd main power source.
Fig. 3 represents that roughly main power source has the structure chart of an example of the wire discharge processing apparatus of the 1st main power source and the 2nd main power source.In the wire discharge processing apparatus shown in this figure 140, main power source 30 has the 1st main power source 30a and the 2nd main power source 30b.The 1st main power source 30a is connected with upside power supply 20a via the 1st 25a of switch element portion, is connected with the thickness of slab direction top of machined object W simultaneously.In addition, the 2nd main power source 30b is connected with downside power supply 20b via the 2nd 25b of switch element portion, is connected with the thickness of slab direction bottom of machined object W simultaneously.The action of above-mentioned the 1st main power source 30a and the 2nd main power source 30b is controlled by the 90a of s operation control portion.
Because the above-mentioned structure in addition in the discharging processor for line electrode 140, identical with the structure of discharging processor for line electrode 130 shown in Figure 1, so in component parts shown in Figure 3, for the part identical with component parts shown in Figure 1, the identical reference number of reference number that uses among mark and Fig. 1 omits its explanation.And the processing machine main body for constituting discharging processor for line electrode 140 marks new reference number 80A, for the new reference number 110A of control device mark.
In the discharging processor for line electrode 140 that constitutes like this, because the 1st main power source 30a is connected with the top of the thickness of slab direction of machined object W, the 2nd main power source 30b is connected with the bottom of the thickness of slab direction of machined object W, so impedance when the power supply state of both sides and impedance from the 2nd main power source 30b to point of discharge from the 1st main power source 30a to point of discharge, along with discharge position to the central portion of the thickness of slab direction of machined object W near and increase respectively.As its result, the discharge current value between line electrode 1 and machined object W, along with the position of point of discharge to the central portion of the thickness of slab direction of machined object W near and reduce.
Fig. 4 be when roughly representing to make discharging processor for line electrode 140 for the both sides power supply state discharge position (position of point of discharge), with the curve map of the relation of discharge current value.Solid line L among this figure 1The expression above-mentioned relation.For reference, with the above-mentioned relation in the discharging processor for line electrode shown in Figure 1 130, with dashed lines L in Fig. 4 2Expression.Solid line L 1The discharge current value and the dotted line L of expression 2The discharge current value of expression is the value that obtains under same process conditions.
As shown in Figure 4, in any of discharging processor for line electrode 130,140, discharge current value between line electrode and machined object, all along with the position of point of discharge to the central portion of the thickness of slab direction of machined object W near and reduce, but as the degree of its reduction, discharging processor for line electrode 140 is bigger than discharging processor for line electrode 130.And, the discharge current value of the thickness of slab direction central portion of machined object itself, if under identical processing conditions, then the value of discharging processor for line electrode 140 is littler than the value of discharging processor for line electrode 130.
Usually, in discharging processor for line electrode, by between line electrode and machined object, supplying with working fluid, suppress discharge and add line electrode overheated in man-hour, but at the central portion of the thickness of slab direction of machined object, compare with the top of the thickness of slab direction of this machined object or the bottom of thickness of slab direction, be difficult for cooling off by working fluid, therefore in the central authorities of the thickness of slab direction of machined object, usually line electrode is overheated, causes the line electrode broken string.
But, in discharging processor for line electrode shown in Figure 3 140, discharge current value during owing to the both sides power supply state is along with the central portion near the thickness of slab direction of machined object W reduces, so even at the central portion of the thickness of slab direction of machined object W, also suppress the overheated of line electrode 1 easily.Therefore, compare, prevent the line electrode broken string easily with the discharging processor for line electrode 130 (with reference to Fig. 1) of explanation in embodiment 1.
Therefore, according to discharging processor for line electrode 140, with discharging processor for line electrode 130 similarly, by pattern upside power supply state, downside power supply state and both sides power supply state are mixed with regulation, can prevent the short circuit between line electrode 1 and machined object W, compare with discharging processor for line electrode 130 simultaneously, suppress the line electrode broken string easily.Its result compares with discharging processor for line electrode 130, improves productivity easily.
Embodiment 3.
In discharging processor for line electrode, if the thickness of slab of Z axle height (relative altitude of upside power supply) or machined object changes, variable in distance then from point of discharge to each power supply, thus, in the impedance separately of the power supply circuits (hereinafter referred to as " downside power supply circuits ") of point of discharge deviation can appear until the power supply circuits (hereinafter referred to as " upside power supply circuits ") of point of discharge and via the downside power supply via the upside power supply.This impedance deviation is brought difference to the size of the discharge current in each power supply circuits, in the bigger power supply circuits of discharge current (power supply circuits that impedance is little), causes the line electrode broken string easily.
Discharging processor for line electrode of the present invention can constitute, according to the impedance between upside power supply circuits and downside power supply circuits, adjusting prevents the line electrode broken string that is caused by the impedance deviation between power supply circuits to the high-frequency pulse voltage supply conditions separately of upside power supply circuits and downside power supply circuits.
Fig. 5～Fig. 7 is respectively the structure chart of an example of roughly representing to prevent the discharging processor for line electrode of the line electrode broken string that causes because of the impedance deviation on the power supply circuits.In the component parts shown in these figure, for the part identical with component parts shown in Figure 1, the identical reference number of reference number that uses among mark and Fig. 1 omits its explanation.
Discharging processor for line electrode 150 shown in Figure 5 has control device 110B, and this control device 110B has impulse hunting control part 95a.Impulse hunting control part 95a reads the data that are stored in the Z axle height (upside power supply 20a is with respect to the height of downside power supply 20b) in the storage part 85 by the user in advance, perhaps, obtain Z axle height by the Numerical Control data that are stored in the storage part 85, this Z axle height and a reference value are compared, obtain the magnitude relationship of the impedance separately of upside power supply circuits and downside power supply circuits.Then, for example by computing, the power supply control data that change is read from this storage part 85, so that the discharge current value in the less power supply circuits of impedance, near the discharge current value in the bigger power supply circuits of impedance, according to the power supply control data after this change, this impulse hunting control part 95a controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.
For example, can perhaps change the umber of pulse of supplying with, regulate the energy of the high-frequency pulse voltage of supplying with to line electrode 1, thereby regulate discharge current value by changing pulse width or the pulse spacing in the high-frequency pulse voltage.Have respectively under the situation of a plurality of switch elements at the 1st 25a of switch element portion and the 2nd 25b of switch element portion, can regulate the energy of the high-frequency pulse voltage of supplying with to line electrode 1 by changing the quantity of the switch element that disconnects.In addition, as the said reference value, adopt the Z axle height of supposition when the power supply control data generates, this a reference value for example is stored in the storage part 85 in advance.This discharging processor for line electrode 150 is particularly useful for using the situation of tabular thing as machined object W.
Discharging processor for line electrode 160 shown in Figure 6 has control device 110C, and this control device 110C has 90b of s operation control portion and impulse hunting control part 95b.90b of s operation control portion and s operation control portion 90 (with reference to Fig. 1) shown in Figure 1 are similarly, have the energy of the high-frequency pulse voltage that use applies to machined object W from line electrode 1 and process velocity etc., calculate the function of the thickness of slab of machined object W successively, result of calculation is sent to impulse hunting control part 95b.In Fig. 6, be illustrated in and omit illustrated velocity measuring device 57 among Fig. 1.
Impulse hunting control part 95b will compare from aforementioned calculation result and a reference value that the 90b of s operation control portion sends, and obtains the magnitude relationship of the impedance separately of upside power supply circuits and downside power supply circuits.And, for example by computing, the power supply control data that change is read from storage part 85, so that the discharge current value in the less power supply circuits of impedance, near the discharge current value in the bigger power supply circuits of impedance, and according to the power supply control data after this change, this impulse hunting control part 95b controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.In addition, as the said reference value, the thickness of slab of supposition when using the power supply control data to generate, this a reference value for example is stored in the storage part 85 in advance.This discharging processor for line electrode 160 is applicable to certainly and uses the situation of tabular thing as machined object W, also is applicable to the situation that is pre-formed recess or hole on machined object W in addition.
Discharging processor for line electrode 170 shown in Figure 7 has control device 110D, and this control device 110D has impulse hunting control part 95c and thickness of slab determination portion 100, in storage part 85, also stores 3 dimension data of machined object.The action of the 90c of s operation control portion control thickness of slab determination portion 100, this thickness of slab determination portion 100 is according to above-mentioned 3 dimension data and the Numerical Control data (the Numerical Control data of Working table driving device 55 usefulness) that are stored in the storage part 85, when specifying the discharge Working position, obtain the thickness of slab of the machined object W of this discharge Working position, these thickness of slab data are sent to impulse hunting control part 95b.Impulse hunting control part 95c will compare from above-mentioned thickness of slab data and a reference value that the 90c of s operation control portion sends, and calculates the magnitude relationship of the impedance separately of upside power supply circuits and downside power supply circuits.Then, for example by computing, the power supply control data that change is read from storage part 85, so that the discharge current value in the less power supply circuits of impedance, near the discharge current value in the bigger power supply circuits of impedance, according to the power supply control data after this change, this impulse hunting control part 95c controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.In addition, as the said reference value, the thickness of slab of supposition when adopting the power supply control data to generate, this a reference value for example is stored in the storage part 85 in advance.This discharging processor for line electrode 170 is applicable to certainly and uses the situation of tabular thing as machined object W, also is applicable to the situation that forms recess or hole in advance on machined object W in addition.
In above-mentioned each discharging processor for line electrode 150,160,170, because can be according to the magnitude relationship (deviation) of the impedance between power supply circuits, regulate supply conditions respectively, break so prevent the line electrode that causes by the impedance deviation between power supply circuits easily to the high-frequency pulse voltage of upside power supply circuits and downside power supply circuits.Therefore, according to these discharging processor for line electrode 150,160,170, with discharging processor for line electrode 130 shown in Figure 1 similarly, by pattern upside power supply state, downside power supply state and both sides power supply state are mixed with regulation, can prevent the short circuit between line electrode 1 and machined object W, compare with discharging processor for line electrode 130 simultaneously, suppress the line electrode broken string easily.As its result, compare with discharging processor for line electrode 130, improve productivity easily.
Embodiment 4.
Discharging processor for line electrode of the present invention can constitute, according to the impedance of upside power supply circuits and the impedance of downside power supply circuits, adjusting prevents the line electrode broken string that is caused by the impedance deviation between power supply circuits to the supply conditions of the high-frequency pulse voltage of each power supply circuits.
Fig. 8 and Fig. 9 are respectively that roughly represent can be according to the impedance of upside power supply circuits and the impedance of downside power supply circuits, regulate the structure chart to an example of the discharging processor for line electrode of the supply conditions of the high-frequency pulse voltage of each power supply circuits.In the component parts shown in these figure, for the part identical with component parts shown in Figure 1, the identical reference number of reference number that uses among mark and Fig. 1 omits its explanation.
Discharging processor for line electrode 180 shown in Figure 8 has processing machine main body 80B that has impedance measurement portion 70 and the control device 110E that has impulse hunting control part 95d.Main power source 30 in the impedance measurement portion 70 difference actual measurement upside power supply circuits and the impedance between the upside power supply 20a, and the impedance between main power source in the downside power supply circuits 30 and the downside power supply 20b, this measured result is sent to impulse hunting control part 95d.Impulse hunting control part 95d will be compared by measured result and a reference value that impedance measurement portion 70 obtains, and calculates the magnitude relationship of the impedance separately of upside power supply circuits and downside power supply circuits.And, for example by computing, the power supply control data that change is read from storage part 85, so that the discharge current value of the less power supply circuits of impedance is near the discharge current value of the bigger power supply circuits of impedance, and according to the power supply control data after this change, this impulse hunting control part 95d controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.In addition, as the said reference value, the impedance of supposition when adopting the power supply control data to generate, this a reference value for example is stored in the storage part 85 in advance.
Discharging processor for line electrode 190 shown in Figure 9, has the control device 110F that has impulse hunting control part 95e, in storage part 85, by the manufacturer or the user of discharging processor for line electrode 190, the upside power supply circuits that storage is in advance measured in advance and the impedance separately of downside power supply circuits.Specifically, store the main power source 30 in the upside power supply circuits and the measured data of the impedance between upside power supply 20a in advance, and the measured data of the impedance between main power source in the downside power supply circuits 30 and downside power supply 20b.Impulse hunting control part 95e directly relatively is stored in the measured data of above-mentioned each impedance in the storage part 85, perhaps compares with a reference value, calculates the magnitude relationship of the impedance separately of upside power supply circuits and downside power supply circuits.And, for example by computing, the power supply control data that change is read from storage part 85, so that the discharge current value of the less power supply circuits of impedance is near the discharge current value of the bigger power supply circuits of impedance, and according to the power supply control data after this change, this impulse hunting control part 95e controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.In addition, as the said reference value, the impedance of supposition when adopting the power supply control data to generate, this a reference value for example is stored in the storage part 85 in advance.
In above-mentioned each discharging processor for line electrode 180,190, because can be according to the impedance of upside power supply circuits self and the impedance of downside power supply circuits self, adjusting is broken so prevent the line electrode that is caused by the impedance deviation (magnitude relationship) between power supply circuits easily to the supply conditions of the high-frequency pulse voltage of each power supply circuits.Therefore, these discharging processor for line electrode 180,190 play the technique effect same with the various discharging processor for line electrode 150,160,170 of explanation in embodiment 3.
Embodiment 5.
In discharging processor for line electrode of the present invention, can increase following line electrode broken string and avoid function: when the sign that detects the line electrode broken string (below, be called " broken string sign ") time, the action of the 1st pulse oscillator and the 2nd pulse oscillator controlled respectively, in case principal vertical line electrode broken string.
Figure 10 has roughly represented to increase the structure chart of example that the line electrode broken string is avoided the discharging processor for line electrode of function.Discharging processor for line electrode 200 shown in this figure has: processing machine main body 80C, and it has broken string sign test section 75; And control device 110G, it has impulse hunting control part 95f, in storage part 85, except in embodiment 1～4 explanation the power supply control data (below, be called " control data of powering substantially " in this embodiment) outside, also storage is used for avoiding the power supply control data (below, be called " broken string is avoided with the power supply control data ") of line electrode broken string when the broken string sign occurring.In component parts shown in Figure 10, for the part identical with component parts shown in Figure 1, the identical reference number of reference number that uses among mark and Fig. 1 omits its explanation.
Above-mentioned broken string sign test section 75 is electrically connected with upside power supply 20a, downside power supply 20b and machined object W, split ratio according to the electric current in for example upside power supply circuits and the downside power supply circuits, obtain the position of point of discharge, when detecting point of discharge and concentrate on the concentrated discharge of a position, be judged as and line electrode broken string sign occurs, send specified signal (below, be called " broken string sign detection signal ") to impulse hunting control part 95f.
Receive the impulse hunting control part 95f of broken string sign detection signal, avoid changing the power supply control data by from storage part 85, reading broken string with the power supply control data, avoid with the power supply control data according to this broken string, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, to avoid the line electrode broken string.For example,, the position of point of discharge is disperseed in time, avoid the line electrode broken string so that the mutual mode that occurs of upside power supply state and downside power supply state is controlled the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.
Discharging processor for line electrode 200 is avoided function because have above-mentioned line electrode broken string, so compare with the various discharging processor for line electrode of explanation in embodiment 1～4, prevents the line electrode broken string easily.Therefore, according to this discharging processor for line electrode 200, with discharging processor for line electrode shown in Figure 1 similarly, by pattern upside power supply state, downside power supply state and both sides power supply state are mixed with regulation, can prevent the short circuit between line electrode 1 and machined object W, simultaneously, compare, be easy to suppress the line electrode broken string with discharging processor for line electrode 130.As its result, compare with discharging processor for line electrode 130, improve productivity easily.
In addition, increasing the line electrode broken string in discharging processor for line electrode avoids under the situation of function, can in the impulse hunting control part, increase following function: the power supply ratio when (1～2 second degree) is the object observation between making with longer-term, revert to the ratio of regulation, promptly, separately power supply ratio of upside power supply state, downside power supply state and both sides power supply state when controlling the action of the 1st pulse oscillator and the 2nd pulse oscillator respectively according to basic power supply control data (below, be called " power supply ratio restore funcitons ").
Figure 11 is the skeleton diagram that is illustrated in an example of the powering mode when increasing power supply ratio restore funcitons among the above-mentioned impulse hunting control part 95f.In the example shown in this figure, at moment T 1Before, according to basic power supply control data, impulse oscillation control part 95f controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.Under this powers control data substantially, carry out following actions repeatedly, that is, after respectively carrying out 1 cycle upside power supply state and downside power supply state, carry out the both sides power supply state in 2 cycles.
At moment T 1If transmit broken string sign detection signal to impulse hunting control part 95 by broken string sign test section 75, then impulse hunting control part 95f avoids with the power supply control data according to broken string, begin to control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, according to upside power supply state and the mutual mode that occurs of downside power supply state, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.Then, if at moment T 2Broken string sign detection signal from broken string sign test section 75 stops, then make impulse hunting control part 95f show power supply ratio restore funcitons, all become the mode of the power supply ratio under the basic power supply control data according to upside power supply state, downside power supply state and both sides power supply state power supply ratio separately, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively.
Specifically, because from moment T 1To moment T 2During, the both sides power supply state in 1 cycle does not carry out yet, so so that the ratio between upside power supply state, downside power supply state and both sides power supply state is 1: 1: 2 a mode, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35 respectively, make from moment T 2To moment T 3During, occur the upside power supply state and the downside power supply state in 1 cycle respectively, and 8 cycle both sides power supply states occur.Thus, make, return to the power supply ratio under the basic power supply control data by upside power supply state, downside power supply state and both sides power supply state power supply ratio separately.
The power supply ratio restore funcitons that increases in impulse hunting control part 95f comprises: the function of calculating the power supply ratio under the basic power supply control data; The measurement broken string is avoided the function with the occurrence number separately of upside power supply state, downside power supply state and both sides power supply state under the power supply control data; Calculate deviation, i.e. the function of the power supply ratio calculation deviation under the basic power supply of the basis control data owing to the power supply ratio of avoiding at broken string producing with powering under the power supply control data; And the function of revising this deviation.Impulse hunting control part 95f according to basic power supply control data, controls the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively once more after moment T3.
Embodiment 6.
In discharging processor for line electrode of the present invention, can increase following function: control the action of the 1st pulse oscillator and the 2nd pulse oscillator respectively, so that can when detect short circuit sign between line electrode and machined object or short circuit, prevent above-mentioned short circuit or eliminate above-mentioned short circuit (hereinafter referred to as " short circuit prevents function ").
Figure 12 roughly represents to increase the structure chart of an example that short circuit prevents the discharging processor for line electrode of function.Discharging processor for line electrode 210 shown in this Fig, has control device 110H, this control device 110H has 90d of s operation control portion and impulse hunting control part 95g, in storage part 85, also storage is used for preventing the power supply control data (hereinafter referred to as " short circuit prevents with the power supply control data ") of short circuit or elimination short circuit when above-mentioned short circuit sign or short circuit occurring.In component parts shown in Figure 12, for the part identical with component parts shown in Figure 1, the identical reference number of reference number that uses among mark and Fig. 1 omits its explanation.
The above-mentioned s operation control 90d of portion is according to by the potential difference between voltage check device 50 detected each power supply 20a, 20b and machined object W, short circuit sign or short circuit between detection line electrode 1 and the machined object W.Specifically, according to by the potential difference between voltage check device 50 detected each power supply 20a, 20b and machined object W, calculate the discharge voltage value, when this value is lower than the average discharge volt value, be judged as and produce short circuit sign or short circuit, the size of the high-frequency pulse voltage that this average discharge volt value applies according to the liquid matter of the material of the material of line electrode 1, machined object W, working fluid and to line electrode 1 etc. preestablishes.And if detect short circuit sign or short circuit, then the 90d of this s operation control portion sends the signal (hereinafter referred to as " short circuit sign detection signal ") of regulation to impulse hunting control part 95g.In addition, above-mentioned average discharge volt value is by the manufacturer of discharging processor for line electrode 210 or the user obtains and be stored in advance in the storage part 85.
Receive the impulse hunting control part 95g of short circuit sign detection signal from the 90d of s operation control portion, prevent with the power supply control data by read short circuit from storage part 85, change the power supply control data, prevent with the power supply control data according to this short circuit, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, in case the short circuit between line electrode 1 and machined object W is perhaps eliminated in the short circuit between principal vertical line electrode 1 and machined object W.For example, by controlling the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, so that become the both sides power supply state, make the discharge stability between line electrode 1 and machined object W, thus, prevent the short circuit between line electrode 1 and machined object W, perhaps eliminate the short circuit between line electrode 1 and machined object W.
Prevent function because discharging processor for line electrode 210 has above-mentioned short circuit,, prevent the short circuit between line electrode broken string 1 and machined object W easily so compare with the various discharging processor for line electrode of explanation in the embodiment 1～5.Therefore, according to this discharging processor for line electrode 210, with discharging processor for line electrode 130 shown in Figure 1 similarly, can upside power supply state, downside power supply state and both sides power supply state be mixed by pattern with regulation, prevent the short circuit between line electrode 1 and machined object W, simultaneously, compare, suppress the short circuit between line electrode 1 and machined object W easily with discharging processor for line electrode 1.As its result, compare with discharging processor for line electrode 130, improve productivity easily.And, in discharging processor for line electrode, increase short circuit and prevent under the situation of function, also can in the impulse hunting control part, be increased in the power supply ratio restore funcitons of explanation in the embodiment 5.
Embodiment 7.
In discharging processor for line electrode of the present invention, can increase following function: reach the flow of the working fluid of side nozzle supply down according to the side nozzle that makes progress respectively from the working fluid feedway, control the action of the 1st pulse oscillator and the 2nd pulse oscillator respectively.
Figure 13 is the structure chart of an example of roughly representing to increase the discharging processor for line electrode of above-mentioned functions.Discharging processor for line electrode 220 shown in this figure has control device 110I, and this control device 110I has the 90e of s operation control portion, impulse hunting controller 95h and flow comparing section 105.In component parts shown in Figure 13, for the part identical, mark the reference number identical with the reference number that in Fig. 1, uses with component parts shown in Figure 1, omit its explanation.
When the above-mentioned s operation control 90e of portion according to the Numerical Control data (the Numerical Control data of working fluid feedway 60 usefulness) that are stored in the storage part 85, when controlling the action of working fluid feedway 60, will with respectively from this working fluid feedway 60 flow of the working fluid supplied with of side nozzle 65a upwards, and the relevant data of flow of the working fluid of side nozzle 65b supply downwards, be sent to flow comparing section 105.Be transmitted the flow comparing section 105 of these data, each data and a reference value have been compared, its result has been sent to impulse hunting control part 95h.Flow comparing section 105 has the data of the working fluid flow of supposition when the control data of for example powering generates, as the said reference value.
Impulse hunting control part 95h reads the power supply control data from storage part 85, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, on the other hand, when the comparative result that exists basis to be obtained by flow comparing section 105 judges that the working fluid flow surpasses the nozzle of a reference value, for example, change above-mentioned power supply control data by computing.That is to say, change above-mentioned power supply control data, reduce so that from 20 ones of upside power supply 20a and downside power supplies, be positioned at judging the power supply ratio that its working fluid flow surpasses the high-frequency pulse voltage that the power supply of the nozzle homonymy of a reference value supplies with to line electrode 1.And,, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively according to the power supply control data after changing.
Under the situation of machined object being carried out line electrode discharge processing, the flow of the working fluid that side nozzle was supplied with under upwards side nozzle reached respectively from the working fluid control device, in the whole process of discharge processing is not constant, for example, in the path that relatively moves of line electrode the position of linearity and during for circular-arc position, the flow difference of above-mentioned working fluid.In addition, at last side nozzle 65a and following side nozzle 65b place, the flow of working fluid is also different.And, when not simultaneously at the flow of last side nozzle 65a place and following side nozzle 65b place working fluid, the amount of liquid of the working fluid from the more nozzle inflow working groove (gap between line electrode 1 and machined object W) of the flow of working fluid, the amount of liquid that flows into the working fluid the working groove than the nozzle that lacks from the working fluid flow is few, in the more nozzle side of working fluid flow, in working groove, accumulate machining chips etc. easily.As its result, the nozzle side that the flow of working fluid is more, discharge frequency raises, and causes the line electrode broken string easily.
In discharging processor for line electrode shown in Figure 13 220, when the flow that is judged as working fluid when existence surpasses the nozzle of a reference value, control the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively, so that reduce from the power supply ratio that is positioned at the high-frequency pulse voltage of supplying with to line electrode 1 with the power supply of this nozzle homonymy, therefore, even during the changes in flow rate of the working fluid that side nozzle 65b supplies with under upwards side nozzle 65a reaches respectively, also can suppress the line electrode broken string.
Therefore, according to this discharging processor for line electrode 220, with discharging processor for line electrode 130 shown in Figure 1 similarly, can upside power supply state, downside power supply state and both sides power supply state be mixed by pattern with regulation, prevent the short circuit between line electrode 1 and machined object W, simultaneously, compare, suppress the line electrode broken string easily with discharging processor for line electrode 130.As its result, compare with discharging processor for line electrode 130, improve productivity easily.
More than, 7 kinds of modes of illustration are illustrated discharging processor for line electrode of the present invention, but the invention is not restricted to above-mentioned 7 kinds of modes.For example, also the data transformation component can be set on control device, thereby only the power supply control data that will expect is stored in the storage part by importing the promiscuous mode (pattern occurring) of upside power supply state, downside power supply state and both sides power supply state from input part, makes the user easily the power supply control data of expecting to be stored in the storage part.
Figure 14 is the structure chart that roughly is illustrated in an example of the discharging processor for line electrode that above-mentioned data transformation component is set in the control device.In the control device 110J of the discharging processor for line electrode shown in this figure 230, data transformation component 108 is set, when (pattern occurring), generation the corresponding power supply control data of pattern occurs with this at the promiscuous mode of importing upside power supply state, downside power supply state and both sides power supply state from input part for it.Power supply control data by this data transformation component 108 generates is stored in the storage part 85 via the 90f of s operation control portion.Impulse hunting control part 95 is controlled the action of the 1st pulse oscillator 35a and the 2nd pulse oscillator 35b respectively according to above-mentioned power supply control data.And in component parts shown in Figure 14, for the part identical with component parts shown in Figure 1, the identical reference number of reference number that uses among mark and Fig. 1 omits its explanation.
In addition, though omit diagram, in discharging processor for line electrode of the present invention, can make the 1st switch element portion and the 2nd switch element portion that connect main power source, be the parts that separate with this main power source, also can make itself and main power source is same component parts.Similarly, can make the 3rd switch element portion and the 4th switch element portion that connect accessory power supply is the parts that separate with this accessory power supply, and also can make itself and accessory power supply is same component parts.For each the 1st pulse oscillator and the 2nd pulse oscillator similarly, it can be the component parts that separates with main power source or accessory power supply, can be same component parts with impulse hunting control also.
In addition, can 1 switch element portion only be set to 1 power supply.Figure 15 is the structure chart of an example of roughly representing 1 power supply only is provided with the discharging processor for line electrode of 1 switch element portion.In the processing machine main body 80D of the discharging processor for line electrode shown in this figure 240, corresponding with above-mentioned power supply 20a and 1 28a of switch element portion (hereinafter referred to as " the 1st 28a of switch element portion ") is set, the switch element portion except the 1st 28a of switch element portion is not connected with upside power supply 20a.Similarly, corresponding with downside power supply 20b and 1 28b of switch element portion (hereinafter referred to as " the 2nd 28b of switch element portion ") is set, the switch element portion except the 2nd 28b of switch element portion is not connected with downside power supply 20b.The 28a of each switch element portion, 28b are shared by main power source 30 and accessory power supply 40.On the 1st 28a of switch element portion, connect the 1st pulse oscillator 35a, on the 2nd 28b of switch element portion, connect the 2nd pulse oscillator 35b.
Above-mentioned the 1st 28a of switch element portion, can for main power source 30 and accessory power supply 40 in any parts that all separate, can be same component parts also with main power source 30 or accessory power supply 40.Similarly, the 2nd 28b of switch element portion, can for main power source 30 and accessory power supply 40 in any parts that all separate, can be component parts mutually also with main power source 30 or accessory power supply 40.
No matter several switch element portion is set on 1 power supply, in discharging processor for line electrode of the present invention, because can be during discharge processing, make upside power supply state, downside power supply state and both sides power supply state mix (appearance) arbitrarily, so can prevent short circuit or line electrode broken string between line electrode and machined object, and the discharge processing capacity of the thickness of slab direction of machined object is suitably changed, improve the machining accuracy on this thickness of slab direction.If improve the power supply ratio of upside power supply state, then can carry out the discharge processing on top of the thickness of slab direction of machined object, if improve the power supply ratio of downside power supply state, then can carry out the discharge processing of the thickness of slab direction bottom of machined object, so can pass through these power supply states of appropriate combination, the machining accuracy on the thickness of slab direction of raising machined object.
In addition, the thickness of the machined object of discharge Working position, because can be according to the mode of discharging processor for line electrode shown in Figure 7 170, use 3 dimension data of machined object to obtain, so use this 3 dimension data to obtain in the discharging processor for line electrode of function of thickness of slab of machined object of discharge Working position having, can omit according to the energy of the high-frequency pulse voltage that applies to machined object from sparking electrode and process velocity etc., calculate the function of machined object thickness of slab.For discharging processor for line electrode of the present invention, except above-mentioned situation, various distortion, modification, combination etc. can also be arranged.

Claims (13)

1. discharging processor for line electrode, it on one side supplies with working fluid between line electrode that the thickness of slab direction at machined object moves and aforementioned machined object, on one side via a pair of power supply of configuration up and down at aforementioned machined object, apply high-frequency pulse voltage to aforementioned line electrode, the discharge that utilization produces between aforementioned line electrode and aforementioned machined object, aforementioned machined object is processed, be it is characterized in that, have:
Main power source, it is via the 1st switch element portion, the upside power supply that is disposed at aforementioned machined object upside in aforementioned a pair of power supply applies high-frequency pulse voltage, and via the 2nd switch element portion, applies high-frequency pulse voltage to the downside power supply that is disposed at aforementioned machined object downside;
The 1st pulse oscillator, it supplies with the pulse signal of the on-off action that is used to the 1st switch element portion that controls to aforementioned the 1st switch element portion;
The 2nd pulse oscillator, it supplies with the pulse signal of the on-off action that is used to the 2nd switch element portion that controls to aforementioned the 2nd switch element portion;
Storage part, its storage power supply control data, this power supply control data is stipulated the on-off action separately of aforementioned the 1st switch element portion and aforementioned the 2nd switch element portion, the control so that the mode that following state mixes is powered: the upside power supply state, it only applies high-frequency pulse voltage by aforementioned upside power supply to aforementioned line electrode; The downside power supply state, it only applies high-frequency pulse voltage by aforementioned downside power supply to aforementioned line electrode; And the both sides power supply state, its by aforementioned upside power supply and aforementioned downside power supply the two, apply high-frequency pulse voltage to aforementioned line electrode synchronously with one another; And
The impulse hunting control part, it controls aforementioned the 1st pulse oscillator and the action separately of aforementioned the 2nd pulse oscillator according to aforementioned power supply control data.
2. discharging processor for line electrode as claimed in claim 1 is characterized in that,
Aforementioned main power source has:
The 1st main power source, it is connected with aforementioned upside power supply via aforementioned the 1st switch element portion, is connected with the thickness of slab direction top of aforementioned machined object simultaneously; And
The 2nd main power source, it is connected with aforementioned downside power supply via aforementioned the 2nd switch element portion, is connected with the thickness of slab direction bottom of aforementioned machined object simultaneously.
3. discharging processor for line electrode as claimed in claim 1 is characterized in that,
Aforementioned pulse oscillator, according to from the impedance between the main power source-upside power supply until the upside power supply circuits of point of discharge of aforementioned main power source via aforementioned the 1st switch element portion and aforementioned upside power supply, and from the impedance between the main power source-downside power supply until the downside power supply circuits of point of discharge of aforementioned main power source via aforementioned the 2nd switch element portion and aforementioned downside power supply, change aforementioned power supply control data, so that the discharge current value in the less power supply circuits of impedance, near the discharge current value in the bigger power supply circuits of impedance, and, control aforementioned the 1st pulse oscillator and the action separately of aforementioned the 2nd pulse oscillator according to the power supply control data after this change.
4. discharging processor for line electrode as claimed in claim 3 is characterized in that,
In aforementioned storage part, the data of storage and the Z axle height correlation of supposition when aforementioned power supply control data generates also,
Aforementioned impulse hunting control part, the Z axle height that adds man-hour according to aforementioned machined object is discharged and be stored in the aforementioned storage part and data aforementioned Z axle height correlation is judged the aforementioned impedance in the upside power supply circuits and the magnitude relationship of the aforementioned impedance in the downside power supply circuits.
5. discharging processor for line electrode as claimed in claim 3 is characterized in that also having:
Workbench, it can move to two direction of principal axis under the state of the aforementioned machined object of mounting;
Working table driving device, it makes aforementioned workbench move to two direction of principal axis;
Velocity measuring device, it measures the actuating speed of aforementioned workbench;
Potential difference between voltage check device, that it detects aforementioned upside power supply and aforementioned downside power supply respectively and aforementioned machined object; And
S operation control portion, it is according to the actuating speed of the aforementioned workbench of being measured by aforementioned velocity measuring device, calculating processing speed, basis is by the detected potential difference of aforesaid voltage checkout gear simultaneously, the energy of the high-frequency pulse voltage that calculating applies to aforementioned machined object from aforementioned line electrode, use the energy of aforementioned process velocity and aforementioned high-frequency pulse voltage, calculate the thickness of slab of aforementioned machined object
Aforementioned impulse hunting control part according to the thickness of slab of the aforementioned machined object that is calculated by aforementioned s operation control portion, is judged the aforementioned impedance in the upside power supply circuits and the magnitude relationship of the aforementioned impedance in the downside power supply circuits.
6. discharging processor for line electrode as claimed in claim 3 is characterized in that also having:
Workbench, it can move to two direction of principal axis under the state of the aforementioned machined object of mounting;
Working table driving device, it makes aforementioned workbench move to two direction of principal axis;
S operation control portion, it controls the action of the drive unit of aforementioned workbench; And
The discharge thickness of slab of aforementioned machined object of position of processing of thickness of slab determination portion, its calculating,
Simultaneously, in the aforementioned storage part also the storage be used for the Numerical Control data of Numerical Control and 3 dimension data of aforementioned machined object are carried out in the action of aforementioned Working table driving device,
Aforementioned s operation control portion, according to the action of the aforementioned Working table driving device of aforementioned Numerical Control Data Control,
Aforementioned thickness of slab determination portion is calculated the thickness of slab of aforementioned machined object of the position of the processing of discharging according to aforementioned Numerical Control data and aforementioned 3 dimension data,
Aforementioned impulse hunting control part, the thickness of slab of the aforementioned machined object that calculates according to aforementioned thickness of slab determination portion is judged aforementioned impedance in the upside power supply circuits and the magnitude relationship between the aforementioned impedance in the downside power supply circuits.
7. discharging processor for line electrode as claimed in claim 3 is characterized in that,
Also have impedance measurement portion, aforementioned impedance in its actual measurement upside power supply circuits and the aforementioned impedance in the downside power supply circuits,
Aforementioned impulse hunting control part according to the measured result of aforementioned impedance measurement portion, is judged aforementioned impedance in the upside power supply circuits and the magnitude relationship between the aforementioned impedance in the downside power supply circuits.
8. discharging processor for line electrode as claimed in claim 3 is characterized in that,
In aforementioned storage part, store the aforementioned impedance in the upside power supply circuits and the measured data separately of the aforementioned impedance in the downside power supply circuits in advance,
Aforementioned vibration control part, according to the measured data separately of aforementioned impedance in the upside power supply circuits that are stored in the aforementioned storage part and the aforementioned impedance in the downside power supply circuits, aforementioned impedance in the judgement upside power supply circuits and the magnitude relationship between the aforementioned impedance in the downside power supply circuits.
9. discharging processor for line electrode as claimed in claim 1 is characterized in that,
Also have broken string sign test section, it is connected with aforementioned upside power supply, aforementioned downside power supply and aforementioned machined object, the sign of detection line electrode broken string,
Aforementioned impulse hunting control part, when aforementioned broken string sign test section detects line electrode broken string sign, change aforementioned power supply control data, so that the discharge position between aforementioned line electrode and aforementioned machined object disperses in time, and, control aforementioned the 1st pulse oscillator and the action separately of the 2nd pulse oscillator according to the power supply control data after this change.
10. discharging processor for line electrode as claimed in claim 9 is characterized in that,
Aforementioned impulse hunting control part when aforementioned broken string sign test section detects line electrode broken string sign, changes aforementioned power supply control data, so that aforementioned upside power supply state and aforementioned downside power supply state alternatively occur.
11. discharging processor for line electrode as claimed in claim 1 is characterized in that, also has:
Potential difference between voltage check device, that it detects aforementioned upside power supply and aforementioned downside power supply respectively and aforementioned machined object; And
S operation control portion, it is according to the testing result that is obtained by the aforesaid voltage checkout gear, judges whether to exist the short circuit between aforementioned line electrode and aforementioned machined object or the sign of this short circuit,
Aforementioned impulse hunting control part, judge when having the sign of aforementioned short circuit or this short circuit in aforementioned s operation control portion, change aforementioned power supply control data, so that the discharge stability between aforementioned line electrode and aforementioned machined object, and, control aforementioned the 1st pulse oscillator and the action separately of aforementioned the 2nd pulse oscillator according to the power supply control data after this change.
12. discharging processor for line electrode as claimed in claim 11 is characterized in that,
Aforementioned impulse hunting control part is judged in aforementioned s operation control portion to change aforementioned power supply control data, to become aforementioned both sides power supply state when having aforementioned short circuit or this short circuit sign.
13. discharging processor for line electrode as claimed in claim 1 is characterized in that, also has:
Last side nozzle, it is configured in the top of aforementioned machined object;
Following side nozzle, it is configured in the below of aforementioned machined object;
The working fluid feedway, it supplies with working fluid to aforementioned upside nozzle and aforementioned side nozzle down respectively;
S operation control portion, the action that it controls aforementioned working fluid feedway makes the working fluid of regulation flow supply with to aforementioned upside nozzle and aforementioned side nozzle down respectively from this working fluid control device; And
The flow comparing section, it obtains the magnitude relationship between the working fluid quantity delivered working fluid quantity delivered of aforementioned upside nozzle and aforementioned down side nozzle and the supposition when generating of aforementioned power supply control data respectively,
Simultaneously, also store the Numerical Control data in the aforementioned storage part, it is used for Numerical Control is carried out in the action of aforementioned working fluid feedway,
Aforementioned s operation control portion, according to the action of the aforementioned working fluid feedway of aforementioned Numerical Control Data Control,
In the result who obtains according to aforementioned flow comparing section, when having the nozzle that the working fluid quantity delivered Duos than the working fluid quantity delivered of supposition when aforementioned power supply control data generates, aforementioned impulse hunting control part changes aforementioned power supply control data, so that reduce to the power supply ratio of aforementioned line electrode from power supply with this nozzle homonymy, and, control aforementioned the 1st pulse oscillator and the action separately of aforementioned the 2nd pulse oscillator according to the power supply control data after this change.
CN200680011788.XA 2006-10-24 2006-10-24 Discharging processor for line electrode Expired - Fee Related CN101282812B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/321179 WO2008050405A1 (en) 2006-10-24 2006-10-24 Wire discharge processing machine

Publications (2)

Publication Number Publication Date
CN101282812A true CN101282812A (en) 2008-10-08
CN101282812B CN101282812B (en) 2013-09-18

Family

ID=39324219

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200680011788.XA Expired - Fee Related CN101282812B (en) 2006-10-24 2006-10-24 Discharging processor for line electrode

Country Status (5)

Country Link
JP (1) JP5031555B2 (en)
CN (1) CN101282812B (en)
DE (1) DE112006004082T5 (en)
TW (1) TWI335848B (en)
WO (1) WO2008050405A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103501947A (en) * 2011-05-16 2014-01-08 三菱电机株式会社 Wire discharge processing apparatus
CN104339045A (en) * 2013-07-25 2015-02-11 佳能市场营销日本株式会社 Wire electrical discharge machining apparatus, control method thereof, and program
CN104772536A (en) * 2014-01-15 2015-07-15 发那科株式会社 Wire electric discharge machine
CN111906396A (en) * 2019-05-08 2020-11-10 高雄科技大学 Vibration-assisted wire-cut electrical discharge machining apparatus
CN111906397A (en) * 2019-05-10 2020-11-10 发那科株式会社 Wire electric discharge machine and wire electric discharge machining method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2396164B1 (en) 2009-02-12 2015-03-11 Kringlan Composites AG Method for producing parts of fiber reinforced plastics
JP5578223B2 (en) * 2012-03-01 2014-08-27 キヤノンマーケティングジャパン株式会社 Multi-wire electric discharge machining system, multi-wire electric discharge machining apparatus, power supply device, semiconductor substrate or solar cell substrate manufacturing method, electric discharge machining method
TWI500466B (en) 2012-09-25 2015-09-21 Ind Tech Res Inst Apparatus and method for electrical discharge machining modulation control
JP6863951B2 (en) * 2018-11-08 2021-04-21 ファナック株式会社 Wire disconnection predictor
JP6875361B2 (en) * 2018-12-25 2021-05-26 ファナック株式会社 Control method of wire electric discharge machine and wire electric discharge machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5947123A (en) 1982-09-03 1984-03-16 Inoue Japax Res Inc Electric discharge machine
CH662075A5 (en) * 1984-10-17 1987-09-15 Charmilles Technologies ELECTROEROSIVE CUTTING PROCESS AND DEVICE FOR ITS IMPLEMENTATION.
JPH0197525A (en) * 1987-10-06 1989-04-17 Inoue Japax Res Inc Wire cut electric discharge machine
JPH0661663A (en) 1992-08-06 1994-03-04 Nec Eng Ltd Connection confirming apparatus for circuit board
EP1498206B1 (en) * 2002-04-22 2011-07-20 Mitsubishi Electric Corporation Machining power supply of wire electric discharge machine and power supply method
CN2810852Y (en) * 2005-03-28 2006-08-30 谭启仁 Wire break protector with built-in A/D converter for linear cutting machine
JP6061663B2 (en) * 2012-12-19 2017-01-18 三菱電機株式会社 Power flow control device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103501947A (en) * 2011-05-16 2014-01-08 三菱电机株式会社 Wire discharge processing apparatus
CN103501947B (en) * 2011-05-16 2016-05-18 三菱电机株式会社 Wire discharge processing apparatus
CN104339045A (en) * 2013-07-25 2015-02-11 佳能市场营销日本株式会社 Wire electrical discharge machining apparatus, control method thereof, and program
CN104772536A (en) * 2014-01-15 2015-07-15 发那科株式会社 Wire electric discharge machine
CN111906396A (en) * 2019-05-08 2020-11-10 高雄科技大学 Vibration-assisted wire-cut electrical discharge machining apparatus
CN111906396B (en) * 2019-05-08 2022-06-17 高雄科技大学 Vibration-assisted wire-cut electrical discharge machining apparatus
CN111906397A (en) * 2019-05-10 2020-11-10 发那科株式会社 Wire electric discharge machine and wire electric discharge machining method
CN111906397B (en) * 2019-05-10 2024-04-26 发那科株式会社 Wire electric discharge machine and wire electric discharge machining method

Also Published As

Publication number Publication date
CN101282812B (en) 2013-09-18
DE112006004082T5 (en) 2009-08-06
JP5031555B2 (en) 2012-09-19
TWI335848B (en) 2011-01-11
TW200819231A (en) 2008-05-01
WO2008050405A1 (en) 2008-05-02
JPWO2008050405A1 (en) 2010-02-25

Similar Documents

Publication Publication Date Title
CN101282812B (en) Discharging processor for line electrode
US7928337B2 (en) Apparatus for machining a workpiece using wire discharge including an upper and lower power supply unit
CN100577336C (en) Wire electric discharge machining apparatus and wire electric discharge machining method
US7039490B2 (en) Controller for wire electric discharge machine
US8642915B2 (en) Wire electric discharge machining apparatus
EP1924384B1 (en) Control method for mig/mag-welding and welding equipment applying this method
US9272349B2 (en) Numerical control device, wire electric discharge machining apparatus using the same, and wire electric discharge machining method using the same
EP2272613A2 (en) Wire-cut electric discharge machine with function to suppress local production of streaks during finish machining
EP2617506B1 (en) Wire electrical discharge machine carrying out electrical discharge machining by inclining wire electrode
JPH0120014B2 (en)
US9168603B2 (en) Wire electric discharge machining apparatus
US4527034A (en) Electrode positioning method and apparatus for NC-EDM
KR100893133B1 (en) Coating apparatus and method for controlling coating apparatus
JP2977864B2 (en) Non-contact machining method and apparatus
CN104801798A (en) Working fluid supply control apparatus for wire electric discharge machine
US5470047A (en) Electrical flame sensor for use in a gas cutting apparatus
JP3842377B2 (en) Electric discharge machining control method and apparatus
JP4973436B2 (en) EDM machine
KR20080044200A (en) Wire-discharge machining apparatus
US5847351A (en) Electrode feeding apparatus for electric-discharge machining
US11084112B2 (en) Electrical discharge machine time slice power supply
JP2001071455A (en) Device and method for cream soldering
JPS63150112A (en) Electric discharge machine
JPS63501552A (en) Method and apparatus for processing conductive materials by electrolytic corrosion
KR930009402B1 (en) Electricity control circuit for electric discharge machine

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130918

Termination date: 20171024