CN106513877B - A kind of control method of electric pulse spark-discharge gap - Google Patents
A kind of control method of electric pulse spark-discharge gap Download PDFInfo
- Publication number
- CN106513877B CN106513877B CN201610904400.4A CN201610904400A CN106513877B CN 106513877 B CN106513877 B CN 106513877B CN 201610904400 A CN201610904400 A CN 201610904400A CN 106513877 B CN106513877 B CN 106513877B
- Authority
- CN
- China
- Prior art keywords
- pulse signal
- voltage
- magnitude
- working pulse
- signal
- 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.)
- Active
Links
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
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
A kind of control method of electric pulse spark-discharge gap, the control method are used for electric spark machine tool, make to keep suitable discharging gap between electrode and workpiece.Its main feature is that, direct impulse is inserted into compartment of terrain in working pulse group, the magnitude of voltage of working pulse is automatically adjusted by direct impulse, the magnitude of voltage and feed-speed for making working pulse match, spark discharge state is kept, avoids the generation of short circuit phenomenon, reduces open circuit phenomenon probability of occurrence, processing efficiency and processing quality are improved, while has been broken away from by manually to adjust the inconvenience of cutting speed.Short circuit current flow is detected during the detection pulse of low-voltage occurs, can prevent wire electrode from damaging, arcing can be prevented when workpiece leaves electrode, avoids the reduction of workpiece finish.
Description
Technical field
The present invention relates to a kind of control method of electric pulse spark-discharge gap, which is used for electric discharge machining apparatus
Bed, makes to keep suitable discharging gap between electrode and workpiece.
Background technology
Its output voltage of the pulse power of electric spark drill hole machine tool is all pre-set, in edm process
Without automatic Regulation function, the speed that moves towards between electrode and workpiece will be with the voltage matches of the pulse power, if feeding speed
Spending can make workpiece contact to form short circuit with electrode soon, if feed speed can make slowly excessively between workpiece and electrode formed hold
Road, both phenomenons can all influence processing efficiency and processing quality；To make to maintain rational gap between electrode and workpiece, to produce
Spark discharge, this needs operator to adjust feeding parameter repeatedly according to processing situation, this brings great inconvenience to operation.Therefore
It is necessary to automatically control the pulse power according to operating mode.
The content of the invention
The technical problem to be solved in the present invention is a kind of, there is provided control method of electric pulse spark-discharge gap, electrode with
Speed is moved towards between workpiece within the specific limits, by controlling the voltage of discharge pulse, makes to maintain between electrode and workpiece
Rational gap, to ensure the formation of electric spark.
The technical scheme is that a kind of control method of electric pulse spark-discharge gap, its used pulse electricity
Source device, including the pulse signal generator being made of microcontroller and D/A converter, pulse signals carry out the work(of power amplification
Rate amplifier, detects the current detector of the output current of power amplifier, store pulse signal message and output current information
Holder and input data keyboard；Control method realizes that its step is by the program inside microcontroller：
First, setting magnitude of voltage is taken from holder, microcontroller exports one group of working pulse signal by setting magnitude of voltage；
2nd, microcontroller accesses the current signal from current detector during each working pulse occurs, such as in the group
No signal current occurs in working pulse signal, continues to output this group of working pulse signal；It is such as defeated in this group of working pulse signal
Occurs current signal during going out, after treating this group of working pulse signal output, into third step；
3rd, microcontroller exports one group of direct impulse signal, the voltage of this group of direct impulse signal raise one by one it is stepped,
Its maximum voltage value is 1.2 times of setting magnitude of voltage, its minimum voltage value is the 1/20 of setting magnitude of voltage；
4th, current detector is accessed during direct impulse signal occurs, when the magnitude of voltage of direct impulse signal is minimum such as
There is current signal, stop the output of direct impulse signal, after coordination electrode is separated with workpiece, export direct impulse letter again
Number, it is further continued for accessing current detector；
Magnitude of voltage as initially there is the direct impulse signal of electric current is less than last time working pulse signal voltage value, then makes work
Make pulse signal voltage value increase △ U, and the magnitude of voltage for heightening rear working pulse signal voltage value is stored in memory, then
Working pulse signal voltage value output services pulse signal after being heightened by this；
Such as the magnitude of voltage of the direct impulse signal is more than or equal to last time working pulse signal voltage value, then working pulse signal
Magnitude of voltage remains unchanged；
Magnitude of voltage such as direct impulse signal reaches peak and no current occurs, then makes the reduction of working pulse signal voltage value
△ U, and the working pulse signal voltage value after turning down is stored in memory, then by the working pulse signal electricity after turning down
Pressure value output services pulse signal；
5th, after every group of working pulse end of output, whether inquiry has END instruction input, if any control process terminates；
Such as nothing, then third step is gone to.
Direct impulse is inserted into this control method compartment of terrain in working pulse group, and work is automatically adjusted by direct impulse
The magnitude of voltage of pulse, the magnitude of voltage and feed-speed for making working pulse match, and keep spark discharge state, avoid short
The generation of road phenomenon, reduces open circuit phenomenon probability of occurrence, improves processing efficiency and processing quality, while broken away from and relied on people
Work adjusts the inconvenience of cutting speed.Short circuit current flow is detected during the detection pulse of low-voltage occurs, can prevent wire electrode from damaging
Wound, arcing can be prevented when workpiece leaves electrode, avoid the reduction of workpiece finish.
Brief description of the drawings
Fig. 1 is the circuit block diagram of spark pulse power device.
Fig. 2 is working pulse and direct impulse oscillogram.
U axis represents voltage in coordinate in fig. 2, and I axis represents electric current.
Fig. 3 is microcontroller internal processes flow chart.
Embodiment
In conjunction with the embodiment of the brief description of the drawings present invention.
A kind of control method of spark pulse power device, the spark pulse power device, including by monolithic
The pulse signal generator that machine and D/A converter are formed, pulse signals carry out the power amplifier of power amplification, detect power
The holder and input number of the current detector of the output current of amplifier, store pulse signal message and output current information
According to keyboard；Its control method is realized by running microcontroller internal processes.
After start, the workpiece on spark-erosion machine tool is moved with certain speed to electrode movement or electrode to workpiece；
Run microcontroller internal processes（Program flow diagram is as shown in Figure 3）, which is described as follows：
First, setting magnitude of voltage Ue is taken from holder, microcontroller exports one group of working pulse signal by setting magnitude of voltage Ue,
Its waveform is as shown in the working pulse area 1 in Fig. 2.
2nd, microcontroller accesses the current signal from current detector during each working pulse occurs, such as in the group
No signal current occurs in working pulse signal, continues to output this group of working pulse signal；The no current in working pulse signal
Occur, represent that the excessive no-spark in gap between electrode and workpiece is discharged, power amplifier output loop is in open-circuit condition, needs
The gap between electrode and workpiece is waited to shorten；
Such as there is current signal during this group of working pulse signal output, to the end of this group of working pulse signal output
Afterwards, into third step.
3rd, microcontroller exports one group of direct impulse signal, the voltage of this group of direct impulse signal raise one by one it is stepped,
Its maximum voltage value Ug is 1.2 times of setting magnitude of voltage, its minimum voltage value Ud is the 1/20 of setting magnitude of voltage, sets minimum electricity
Produce arcing when pressure value can prevent short circuit between electrode and workpiece, the detection arteries and veins in the waveform such as Fig. 2 of direct impulse signal
Rush shown in area 2.
4th, current detector is accessed during direct impulse signal occurs, when the magnitude of voltage of direct impulse signal is minimum such as
There is current signal, stop the output of direct impulse signal, after control stepper motor makes electrode be separated with workpiece, output again is visited
Pulse signal is surveyed, is further continued for accessing current detector；
Magnitude of voltage as initially there is the direct impulse signal of electric current is less than last time working pulse signal voltage value（Such as Fig. 2
Shown in middle direct impulse area 1）, then being heightened by increment △ U makes working pulse signal voltage value（Such as 2 institute of Tu2Zhong working pulses area
Show）, and the magnitude of voltage deposit memory of rear working pulse signal voltage value will be heightened, then by the working pulse after heightening
Signal voltage value output services pulse signal；The magnitude of voltage of direct impulse signal is less than working pulse signal voltage value, represent into
To excessive velocities, short circuit occurs for a long time, it is therefore desirable to heighten working pulse signal voltage value to increase workpiece by electrical fire
The speed of flower corrosion；
Such as the magnitude of voltage of the direct impulse signal is more than or equal to last time working pulse signal voltage value, then working pulse signal
Magnitude of voltage remains unchanged；
Magnitude of voltage such as direct impulse signal reaches peak and no current occurs（As shown in Tu2Zhong direct impulses area 2）, then
Being turned down by increment △ U makes working pulse signal voltage value, and the working pulse signal voltage value after turning down is stored in memory,
Then by the working pulse signal voltage value output services pulse signal after turning down（Such as Tu2Zhong working pulses area 3）；Detect arteries and veins
The magnitude of voltage of signal is rushed up to peak and no current occurs, represent that the magnitude of voltage of working pulse signal is excessive, workpiece is by electric spark
The speed of corrosion is more than feed speed, opens a way between workpiece and electrode；After working pulse signal voltage value is turned down, with work
The feeding open circuit phenomenon of part can be eliminated；
The △ U are the increment of adjustment of working pulse signal voltage value, and the big I of △ U is in working pulse signal voltage
Selected in the 2% to 10% of value.
5th, after every group of working pulse end of output, whether inquiry has END instruction input, if any control process terminates；
Such as nothing, then third step is gone to.
The number of every group of working pulse is set as 80-160, and the number of every group of direct impulse can be set to 8 to 32, detection
The number of pulse is more, and the precision of adjustment working pulse magnitude of voltage is higher, but the time that direct impulse takes is also more；It is preferred that every group
The number of direct impulse is 8, wherein the contour rising of magnitude of voltage of second to the 8th direct impulse, the 5th direct impulse
Magnitude of voltage with setting magnitude of voltage Ue it is equal.So detection can be shortened on the basis of adjustment working pulse magnitude of voltage precision is ensured
The time that pulse takes.
Further to shorten the time that direct impulse takes, once detecting electric current in direct impulse output procedure, then
Do not continue to export direct impulse below（As shown in Tu2Zhong direct impulses area 1）.
The model AT89C52 of the microcontroller, the clock cycle of microcontroller are arranged to 12MHZ, the number of D/A converter
It it is 8 according to line, the voltage of D/A converter output has 256 kinds of changes, the set of frequency of working pulse signal and direct impulse signal
For 20KHZ, microcontroller can rapidly adjust the output voltage and conversion waveform of D/A converter.The model of the holder
For AT24C01, the data of storage will not be lost after power down.
Claims (2)
1. a kind of control method of electric pulse spark-discharge gap, its used Pulased power supply unit, including by microcontroller and
The pulse signal generator that D/A converter is formed, pulse signals carry out the power amplifier of power amplification, detect power amplification
The current detector of the output current of device, the holder of store pulse signal message and the keyboard of input data；Control method
Realized by the program inside microcontroller, its step is：
First, setting magnitude of voltage is taken from holder, microcontroller exports one group of working pulse signal by setting magnitude of voltage；
2nd, microcontroller accesses current detector during each working pulse occurs, such as without electricity in this group of working pulse signal
Flow signal to occur, continue to output this group of working pulse signal；Such as occurs electric current letter during this group of working pulse signal output
Number, after treating this group of working pulse signal output, into third step；
3rd, microcontroller exports one group of direct impulse signal, the magnitude of voltage of this group of direct impulse signal raise one by one it is stepped, its
Maximum voltage value is 1.2 times of setting magnitude of voltage, its minimum voltage value is the 1/20 of setting magnitude of voltage；
4th, current detector is accessed during direct impulse signal occurs, as occurred when the magnitude of voltage of direct impulse signal is minimum
Current signal, stops the output of direct impulse signal, after coordination electrode is separated with workpiece, exports direct impulse signal again, then
Continue to access current detector；
Magnitude of voltage as initially there is the direct impulse signal of electric current is less than last time working pulse signal voltage value, then makes work arteries and veins
Signal voltage value increase △ U are rushed, and the magnitude of voltage for heightening rear working pulse signal is stored in memory, after then being heightened by this
Working pulse signal voltage value output services pulse signal；
Such as the magnitude of voltage of the direct impulse signal is more than or equal to last time working pulse signal voltage value, then working pulse signal voltage
Value remains unchanged；
Magnitude of voltage such as direct impulse signal reaches peak and no current occurs, then working pulse signal voltage value is reduced △ U,
And the working pulse signal voltage value after turning down is stored in memory, then by the working pulse signal voltage value after turning down
Output services pulse signal；
5th, after every group of working pulse end of output, whether inquiry has END instruction input, if any control process terminates；Such as
Nothing, then go to third step.
2. the control method of electric pulse spark-discharge gap according to claim 1, it is characterized in that, the size of increment △ U
It can be selected in the 2% to 10% of working pulse signal voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610904400.4A CN106513877B (en) | 2016-10-18 | 2016-10-18 | A kind of control method of electric pulse spark-discharge gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610904400.4A CN106513877B (en) | 2016-10-18 | 2016-10-18 | A kind of control method of electric pulse spark-discharge gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106513877A CN106513877A (en) | 2017-03-22 |
| CN106513877B true CN106513877B (en) | 2018-05-01 |
Family
ID=58332152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610904400.4A Active CN106513877B (en) | 2016-10-18 | 2016-10-18 | A kind of control method of electric pulse spark-discharge gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106513877B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624217B (en) * | 2016-10-18 | 2018-06-22 | 丁毅 | A kind of control method of spark pulse power device |
| CN106735636B (en) * | 2017-03-31 | 2019-11-19 | 山东豪迈机械科技股份有限公司 | Electrical discharge machining discharging headlamp circuit and method |
| CN108393548B (en) * | 2018-01-25 | 2020-06-26 | 西安理工大学 | Discharge gap control system and control method for electrospark wire-electrode cutting of monocrystalline silicon |
| CN109277657B (en) * | 2018-11-16 | 2020-01-21 | 苏州哈工乔德智能装备有限公司 | Self-adaptive discharge control system and method for wire-moving linear cutting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104688A (en) * | 1985-06-19 | 1986-12-24 | 洛迦诺电子工业股份有限公司 | The adaptive control method of spark eroding cutting and electric spark cutter sweep running parameter |
| US4728764A (en) * | 1984-02-01 | 1988-03-01 | Nec Corporation | Apparatus for detecting discharge gap in electric discharge machining |
| JP2002036030A (en) * | 2000-07-24 | 2002-02-05 | Mitsutoyo Corp | Electrical discharge machine, and electrical discharge machining method |
| CN102248235A (en) * | 2011-05-23 | 2011-11-23 | 哈尔滨工业大学 | Device and method for detecting discharge state in electric spark linear cutting work gap |
| CN103084675A (en) * | 2013-01-15 | 2013-05-08 | 洛阳信成精密机械有限公司 | Method and control system of electric discharge machining processing feed automatic control |
| CN104423311A (en) * | 2013-08-20 | 2015-03-18 | 沈阳高精数控技术有限公司 | Processing gap intelligent control system and method for electromachining special-purpose numerical control system |
-
2016
- 2016-10-18 CN CN201610904400.4A patent/CN106513877B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4728764A (en) * | 1984-02-01 | 1988-03-01 | Nec Corporation | Apparatus for detecting discharge gap in electric discharge machining |
| CN85104688A (en) * | 1985-06-19 | 1986-12-24 | 洛迦诺电子工业股份有限公司 | The adaptive control method of spark eroding cutting and electric spark cutter sweep running parameter |
| JP2002036030A (en) * | 2000-07-24 | 2002-02-05 | Mitsutoyo Corp | Electrical discharge machine, and electrical discharge machining method |
| CN102248235A (en) * | 2011-05-23 | 2011-11-23 | 哈尔滨工业大学 | Device and method for detecting discharge state in electric spark linear cutting work gap |
| CN103084675A (en) * | 2013-01-15 | 2013-05-08 | 洛阳信成精密机械有限公司 | Method and control system of electric discharge machining processing feed automatic control |
| CN104423311A (en) * | 2013-08-20 | 2015-03-18 | 沈阳高精数控技术有限公司 | Processing gap intelligent control system and method for electromachining special-purpose numerical control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106513877A (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106513877B (en) | A kind of control method of electric pulse spark-discharge gap | |
| CN106624217B (en) | A kind of control method of spark pulse power device | |
| CN102554374B (en) | Self-adjusting discharge machining energy-saving power supply device and method thereof | |
| WO2003037560B1 (en) | Welding current control system and method | |
| CN102699453B (en) | Electric spark machining method and device for micro inverted taper hole | |
| JP2010201521A (en) | Machining power supply apparatus of die-sinking electric discharge machining device | |
| CN103447644A (en) | Penetration detection method of spark erosion drilling machine | |
| Jiang et al. | Adaptive control for small-hole EDM process with wavelet transform detecting method | |
| CN202752713U (en) | Electric spark machining device of small back-tapered hole | |
| JP2682310B2 (en) | Wire electric discharge machining method and apparatus | |
| CN104985270A (en) | Intelligent integration control cabinet for electric spark linear cutting machine tool | |
| CN1712165A (en) | Self-adaption control and controller of discharging energy for discharging machining impulse from linear cut | |
| CN105033369A (en) | Machining power supply device for electric discharge machine | |
| JPS6052890B2 (en) | Wire cut electrical discharge machining control method | |
| CN106563857B (en) | A kind of electric spark machine tool pulse power | |
| CN108436203A (en) | Adaptive wire-electrode cutting impulsing power source and the servo tracking control device for monitoring the power supply | |
| JPS6227928B2 (en) | ||
| CN104439568A (en) | Method and apparatus for spark-erosion machining of a workpiece | |
| CN104057179A (en) | Power Supply Device For Electrical Arc Welding And Controlling Method Therefor | |
| CN108340033A (en) | Process the EDM shaping machine intelligent depth control system and method for PCD composite sheets | |
| CN107775126A (en) | Electrical discharge machining pulse power and its control method | |
| CN103658891A (en) | Long-short circuit restraining device used in discharge process of computer numerical control wire-cut electric discharge machine | |
| CN107775128B (en) | Electrical discharge machining pulse power and its control method | |
| US8278586B2 (en) | Sinker electric discharge machining method, and sinker electric discharge machining apparatus | |
| JPS6247134B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191223 Address after: Group 3, Yuxi village, Yuxi Town, Jiangyan District, Taizhou City, Jiangsu Province Patentee after: BAOSHIJIE CNC machine tool Jiangsu Co., Ltd Address before: Jiangyan District of Jiangsu city in Taizhou province 225500 Luo Tong Street No. 7 Building 301 room Jiahe Lai Patentee before: Ding Yi |