CN2121294U - Programmable electric spark wire-cutting pulse power supply - Google Patents
Programmable electric spark wire-cutting pulse power supply Download PDFInfo
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- CN2121294U CN2121294U CN92213118.XU CN92213118U CN2121294U CN 2121294 U CN2121294 U CN 2121294U CN 92213118 U CN92213118 U CN 92213118U CN 2121294 U CN2121294 U CN 2121294U
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- 238000005520 cutting process Methods 0.000 title abstract description 19
- 238000010892 electric spark Methods 0.000 title abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 description 8
- 238000003754 machining Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000015654 memory Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 2
- 241001323319 Psen Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Abstract
The utility model provides a programmable electric spark wire-cutting pulse power supply, which is controlled by a single-chip computer; the utility model comprises a key board display circuit, a programmable pulse-generating circuit, an output control circuit for processing electric currents, and a testing circuit. A traditional method, in which the output parameters of a pulse power supply is changed by altering RC parameters, is not used; three operational modes for conventional processing, expertise, and user settings are realized by the control of the single-chip computer; the best operating parameters are directly chosen by the computer from the machining-parameter databanks of users; convenient operations and output are obtained. The utility model is suitable for NC wire-cutting machines, smoothness and precision for the processing of work pieces can be enhanced, and energies can be saved.
Description
The utility model belongs to the computer control application.The purpose of this utility model provides a kind of programmable Wire EDM pulse power.The Wire EDM pulse power is the important component part of wire cutting machine tool, is one of equipment that influences wire cutting technology index most critical.The performance of wire-electrode cutting impulsing power source, has determined the quality of processing technology effect under certain condition.The reasonable power supply of result of use on wire cutting machine tool is the grouping pulse power that is made of discrete component or integrated circuit at present.Its functional-block diagram is seen Fig. 1.Its pulse-generating circuit is made up of 1 high frequency short pulse generator, 2 low frequencies grouping impulse generator and 3 gate circuits.High frequency short pulse generator is to produce small-pulse effect width and small-pulse effect high-frequency flip-flop at interval; Low frequency grouping impulse generator is to produce the big pulse width and the LF multivibrator in big pulse spacing, the RC value that changes these two oscillators then can change the pulsewidth and the interval of its output, after the pulse signal process " with door " of these two multivibrator outputs, just can export the grouping impulse waveform.Such waveform amplifies through 4 pulses again and 5 power output stages just can obtain the potential pulse that is used for processing work of same waveform at discharging gap.6 is to be the each several part direct current power source supplying power in the accompanying drawing 1.The use of the grouping pulse power has improved the machining accuracy and the fineness of line cutting effectively.The utility model proposes a kind of new design based on above-mentioned principle to the Wire EDM pulse power: with the INTEL8031 single-chip microcomputer is core, adopt programmable timer/counter circuit as high frequency short pulse generator and low frequency grouping impulse generator, thereby constitute the programmable line cutting processing pulse power.After adopting this design, paired pulses power supply output pulse width and adjusting at interval can directly be realized by program and needn't use the method that changes impulse generator RC component values.Again owing to use single-chip microcomputer as central controller, can in EPROM, store a collection of through repeatedly processing the machined parameters of practice test, such as output pulse width, at interval, processing electric current etc., the user needs only from data such as the material classification of keyboard input workpiece to be processed, thickness, processing fineness, single-chip microcomputer optimizes optimal processing parameters by program from the parameter of storing in advance, the output of control impuls power supply is processed workpiece.Therefore the utility model adaptation is processed with the workpiece that different processing fineness require different materials, different-thickness, difformity, and all can obtain satisfied processing effect.
Below in conjunction with accompanying drawing the utility model is described in detail.
Accompanying drawing 3 is hardware block diagrams of the present utility model.Wherein 15 is master controllers, is used for functions such as the processing of control and management, data of system and storage.The 16th, current control circuit, master controller is controlled by the output processing electric current size of its paired pulses power supply.The 17th, programmable pulse produces circuit, and its function is by processing request generation, amplification, driving pulse output.The 18th, the processing electric current testing circuit, it is used for the size of processing electric current is detected, and judges that for master controller the machining state of current wire cutting machine tool provides foundation.The 19th, keyboard-display circuit, it provides interactive interface, is used for the input of control command and process data and the output of machining state.The 20th, power circuit, provide altogether+100V ,+12V ,+5V ,+15V totally 4 groups of dc sources, be that system's each several part circuit uses.
Accompanying drawing 4 is detailed electrical schematic diagrams of the present utility model.
Main control circuit.By 8031,74LS373,2864E
1Fundamental system that PROM constitutes and 74LS138 address decoder are formed.The wherein electric E that rewrites
1The OE end of PROM2864 is subjected to 8031 RD or PSEN signal controlling, therefore it is both as the memory under program EPROM of system, the data memory RAM of double as modifiable parameter again, its capacity is the 8K byte, has taken the address 0000H-1FFFH of program area and data field simultaneously.Address decoder 74LS138 output Y0, Y1, Y2 respectively as 8279, the chip selection signal of 8253-1,8253-2, their sequence of addresses is: 2000H-2001H, 4000H-4003H, 6000H-6003H.
Keyboard-display circuit.The core of this circuit is a programmable keyboard display interface circuit 8279, and it is 8 demonstrations with program setting, shows the typewriter mode that is input as from left to right, and the keyboard mode of operation is defined as two key interlockings, and operating frequency is 100KHZ.This device adopts the membrane keyboard of 16 keys.Display circuit reality has only been used 7, the 00H-04H position is used for 57 sections light-emitting diode displays of accompanying drawing 2 in 8279 display random access memories, three sections 11(working methods indications that are used for accompanying drawing 2 of a in the display random access memory in 05, b, c), 8 sections 12(duties indications that then are used for accompanying drawing 2 in 06).7407 and the R1-R8 section of being used for drives, 4 * 75451 be used for the position and drive.R1-R8 all uses 43 Europe.Demonstration of this device or keyboard all adopt dynamic scan mode work, and are directly finished by 8279 internal circuit and need not 8031 bother about.8279 IRQ end is to be connected to 8031 INTO end after anti-phase in the accompanying drawing 4, and therefore 8031 is the management that realize under interrupt mode 8279.
Programmable pulse produces circuit.This circuit is made up of 8253-1,8253-2 and IC3-IC9, J1, R9, wherein IC3, IC4 are the 1/274LS74D trigger, IC5-IC8 is that 1/474LS32 double input end OR circuit, IC9 are 74LS04 hex inverter circuit, and J1 is the 12V DC relay, and R9 is 10K ohm.This circuit is the core component that the utility model is realized the programmable digital formula pulse power.8253-1,8253-2 are programmable timer/counter interface chips, and every has 3 16 independently counting channels, and 0 passage of 8253-1,1 passage are used to produce the short chong channel of high frequency, and 0 passage of 8253-2,1 passage are used to produce low frequency and divide group pulse.Its input clock is taken from 8031 ALE, and frequency is 1MH, can determine that thus minimum output pulse width is 1 S.More than used four 16 counting channels be set to mode 2 patterns (rate generator) by program, can use their output pulse frequency of software change.This pulse-generating circuit utilized just gate-control signal under mode 2 patterns effect and can be by the characteristics of software change output pulse frequency, its operation principle is: after to each 8253 counting channel set-up mode word and count value, P1.0 set with 8031, promptly the gate terminals GATE of 8253 each passage is " 1 ", this moment, four passages began simultaneously input clock to be counted, and had realized the high frequency short pulse thus and had divided the initial synchronous of group pulse.The count value that each counting channel is provided with first is not to be to add used pulsewidth and spacing value of man-hour, only be to utilize the count value second time that changes each passage during this period of time, these values be used for adjusting actual output the high and low frequency pulse pulsewidth with at interval, therefore to be provided with during this period of time long enough so that four passages have enough time to change count value.OUT0, OUT1 will successively export a low level after 0.1 channel counts of 8253-1 reaches, under the effect of OUT0=" 0 ", the Q end of high frequency trigger IC3 will be changed to 0, the Q of IC3 end is changed to 1 again under the effect of OUT1=" 0 ", this shows, appropriate selection count value will obtain its pulsewidth and the high frequency short pulse sequence that meets processing request at interval at the Q of IC3 end.Output waveform figure is seen accompanying drawing 5.Use the same method and control 8253-2, on low frequency trigger IC4, also can obtain one group of low-frequency pulse sequence.Above-mentioned high frequency, low-frequency pulse form grouping pulse train behind IC5.The output of this pulse power is whether except that being subjected to main controller controls, the also controller of necessary acceptance line cutting off machine control when processing work, the former is realized by 8031 pairs of P1.1 position controls, the latter controls HF switch K(in machine tool controller by the wire cutting machine bed controller), and then control J1 relay is realized.When requiring to process pulse output, wire cutting machine bed controller control K closes, the J1 energising, and the adhesive of J1 normally opened contact, the IC6 door is opened, and high-frequency impulse is output after IC9 drives.As long as K disconnects, IC6 closes when disconnecting high frequency, and IC9 is a no-output.From the branch group pulse of IC9 output, via the drive circuit that T1-T4, R10-R13 form, output processing pulse on VMOS pipe T4.In order to obtain bigger output current,, and four identical driver element circuit have been designed with 4 in parallel uses of VMOS pipe for this reason.M is a processing work in the accompanying drawing 4, connects+100V, and D is machined electrode silk (molybdenum filament); R16, D1 are the molybdenum filament holding circuit; D2, R17, R18, C1, C2 are the sampling output circuits, provide the sampling frequency variation signal to the line cutter controller, and above-mentioned two circuit all are common common circuit.
The processing electric current output control circuit is made up of anti-phase drive circuit of 7406 open collectors and J2-J5, realize the output control of processing electric current with it, can be according to processing request, everybody carries out the position control to P1.4-P1.7, when certain position is 1, and corresponding relay adhesive, cut one road VMOS pipe by the contact of adhesive, one road processing electric current is provided, therefore can cuts four road VMOS pipe at most, total processing electric current reaches 10A.
The processing electric current testing circuit.Form by V/F converter LM331, photo-coupler TIL117, R19-R24, C3-C5 and IC10, T0 of 8031 etc.Wherein R19, R20 are that 110K, R21 are 13K, and R22 is that 6.8K, R23 are that 3.9K, R24 are 5K, and C3 is 1, C4 is 0.1, and C5 is 0.01, IC10 is 1/474LS00.Processing electric current is at sample resistance R15(1 ohm) on be converted to voltage signal, and send LM331 to carry out the V/F conversion, corresponding 0-10V voltage, the figure signal frequency is 0-10KHZ.The effect of photo-coupler TIL117 is that the frequency signal of LM331 output is carried out entering strobe control circuit IC10 after the level translation.Here adopt counting method to realize frequency measurement.Gate time is by the timing decision of control signal P1.2 according to 8031 counter T1, that is determine the length of gate time by T1, when beginning to carry out frequency measurement, P1.2=" 1 " starts T1 simultaneously and regularly begins, for example be 100mS gate time, P1.2=" 0 " then behind the 100mS then, closed shutter, the counting to T0 stops immediately, read the count value N of T0 this moment, and be scaled the average current that adds man-hour: I=10 by following formula
-3N(A).
Power supply.The three-phase alternating current power supply mode of employing standard is by the break-make of the control of the switch on panel general supply.Have four groups of power supplys, wherein processing obtains after by three phase rectifier with 100V, all the other+5V ,+12V ,+pass through realization such as integrated regulator 7805,7812,7815 after the 15V rectification.
Now the course of work with this device is summarized as follows: after the system power-up, automatically working method is arranged on 1 grade of usual manner: pulsewidth 20S, 80S at interval, and pulse frequency is 10KHZ, inserts two electric current power amplifier units, on average processing electric current is 5A.Behind the processing button of pressing on the lower panel, master controller is according to the machined parameters that has been provided with, programmable counter 8253 is carried out the initialization setting, existing pulse output on IC6, after the processing of the high frequency on wire cutting machine tool key K presses, the pulse of IC9 output promotes the VMOS pipe after driving, high-frequency and high-voltage processing pulse is provided between workpiece and electrode, and wire cutting machine tool enters machining state.At this moment the master controller 8031 of this device enters main program work.Main program is controlled this device from R15 current sampling resistor up-sampling, obtain the average operating current that workpiece adds man-hour by the V/F conversion, send 8279 after then this current values being handled, show by 5 seven sections LED on 8279 control panels, meanwhile also this current value is divided into 8 grades and send 8 LED mode indicators to show.Find out that thus the operator shows that by concrete numerical value reaching machining state indication intuitively monitors process.Master controller is provided with the keyboard handling procedure in interrupt service routine, in case promptly change the keyboard handling procedure after having key to press over to, carry out respective handling according to each keypress function, and realizes aforementioned various machining functions.
The utility model successfully is applied on the numerically controlled wire cutting machine of models such as SCX-1, J0175B-CNC1, and the processing practice shows that it can be applied on the electric spark linear cutting machine of other quick wire fully.
Claims (5)
1, a kind ofly produces by electric current output control circuit, programmable pulse that circuit, processing electric current testing circuit and keyboard-display circuit constitute, monolithic processor controlled and the Wire EDM pulse power able to programme of 4 groups of dc sources is provided by power circuit by 8031, it is characterized in that forming programmable pulse with two 8253,74LS74D trigger, 74LS32 dual output end OR circuit and 74LS04 hex inverter circuit produces circuit, 0 passage, 1 passage with 8253-1 produce the high frequency short pulse, and 0 passage of 8253-2,1 passage produce low frequency and divide group pulse.
2, programmable pulse power supply according to claim 1, it is characterized in that by 8031,74LS373,2864 and 74LS138 form the computer main control circuit.
3, programmable pulse power supply according to claim 1 is characterized in that forming keyboard-display circuit by the membrane keyboard and the programmable keyboard display interface circuit 8279 of 16 keys.
4, programmable pulse power supply according to claim 1 is characterized in that forming the processing electric current output control circuit by the anti-phase drive circuit of 7406 open collectors, relay and VMOS pipe.
5, programmable pulse power supply according to claim 1 is characterized in that forming the processing electric current testing circuit by the TO of V/F converter LM331, photo-coupler TIL117,74LS00 and 8031.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92213118.XU CN2121294U (en) | 1992-01-23 | 1992-01-23 | Programmable electric spark wire-cutting pulse power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92213118.XU CN2121294U (en) | 1992-01-23 | 1992-01-23 | Programmable electric spark wire-cutting pulse power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2121294U true CN2121294U (en) | 1992-11-11 |
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ID=4957902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92213118.XU Granted CN2121294U (en) | 1992-01-23 | 1992-01-23 | Programmable electric spark wire-cutting pulse power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2121294U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985270A (en) * | 2015-07-27 | 2015-10-21 | 武汉鸿麟电子有限公司 | Intelligent integration control cabinet for electric spark linear cutting machine tool |
| CN106825797A (en) * | 2017-04-01 | 2017-06-13 | 广东商鼎智能设备有限公司 | Spark-erosion machine tool and its control system |
| CN107398609A (en) * | 2017-08-16 | 2017-11-28 | 南京亿希姆机电科技有限公司 | One kind is used for large space multiple computer desk Electrolyzed Processing intelligent control pulse power system |
| CN108941812A (en) * | 2018-09-12 | 2018-12-07 | 南京航空航天大学无锡研究院 | Device is arranged in a kind of parameter of to-and-fro thread feed electric spark wire-electrode cutting machine automatically |
-
1992
- 1992-01-23 CN CN92213118.XU patent/CN2121294U/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985270A (en) * | 2015-07-27 | 2015-10-21 | 武汉鸿麟电子有限公司 | Intelligent integration control cabinet for electric spark linear cutting machine tool |
| CN106825797A (en) * | 2017-04-01 | 2017-06-13 | 广东商鼎智能设备有限公司 | Spark-erosion machine tool and its control system |
| CN106825797B (en) * | 2017-04-01 | 2019-02-12 | 广东商鼎智能设备有限公司 | Spark-erosion machine tool and its control system |
| CN107398609A (en) * | 2017-08-16 | 2017-11-28 | 南京亿希姆机电科技有限公司 | One kind is used for large space multiple computer desk Electrolyzed Processing intelligent control pulse power system |
| CN108941812A (en) * | 2018-09-12 | 2018-12-07 | 南京航空航天大学无锡研究院 | Device is arranged in a kind of parameter of to-and-fro thread feed electric spark wire-electrode cutting machine automatically |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |