CN106825884A - A kind of CUT turns arc circuit and method - Google Patents
A kind of CUT turns arc circuit and method Download PDFInfo
- Publication number
- CN106825884A CN106825884A CN201710089085.9A CN201710089085A CN106825884A CN 106825884 A CN106825884 A CN 106825884A CN 201710089085 A CN201710089085 A CN 201710089085A CN 106825884 A CN106825884 A CN 106825884A
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- CN
- China
- Prior art keywords
- circuit
- signal
- arc
- comparison
- cut
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
Abstract
The present invention discloses a kind of CUT and turns arc circuit, it is characterised in that including：One sample circuit, the sample circuit is used to gather Hall current sampling feedback value；One comparison circuit, the comparison circuit is used to compare the output signal and a preset current value signal of the sample circuit, exports a comparison signal；One pilot arc start-up circuit, for opening a pilot arc start-up circuit according to the comparison signal；One processor, the processor monitors the open signal of the comparison signal and the pilot arc start-up circuit, and the pilot arc start-up circuit is opened according to the comparison signal and the open signal.
Description
Technical field
The present invention relates to CUT field, more particularly to a kind of CUT turns arc circuit and turns arc side
Method.
Background technology
Plasma cut be the plasma arc with high temperature and high speed as thermal source, metal that will be cut is local melting, and simultaneously
The metal that will have been melted with high velocity air blows away and forms a kind of process of narrow incisions.
The electric control system of CUT includes plasma electric source device, arc initiation device, air-control device, numerical control system
The major parts such as system, cooling system.Arc initiation device produces pilot arc before cutting arc generation, even if the gas between nozzle and electrode
There is ionization and produce plasma jet in body, this is the first step operation for cutting workpiece.Arc initiation device includes high-frequency and high-voltage striking electricity
Road or high pressure low frequency arc ignition circuit, striking start-up circuit, surge voltage absorbing circuit, connection cable etc..Striking start-up circuit is born
Duty starts arc ignition circuit, starts cutting process.Striking start-up circuit must reliable operation, it is high to start success rate, be controlled by etc. from
Sub- power-supply controller of electric, connects striking relay under the control of plasma power supply controller during startup, and triggering and conducting striking is opened
Power device in dynamic circuit, is connected to ground by 1W power circuits by DC power anode（Positive pole）, negative pole connects cutting torch in itself
Electrode so that gas is ionized between nozzle and electrode, produce plasma jet, i.e. pilot arc.
When pressing close to workpiece after usual striking success, cutting arc is rapidly turned to by pilot arc and cutting is completed, when leaving work
Pilot arc is changed into again after part, here it is usually said " turning arc ".But in actual air CUT operationally, once in a while
Occur that cutting arc turns pilot arc unsuccessful, phenomenon can be generally described as after cutting terminates, it is directly flame-out or still to cut
Cut arcuation state.It is one of extremely important performance to turn pilot arc, turn pilot arc success rate it is too low all kinds of corrupt practices creep in, for example can be straight
Connect influence operating efficiency；Quote lead after arc failure will striking again, the easily-consumed products service life such as nozzle can be shortened；User can be influenceed
Cutting experience etc..
Therefore, need badly in the prior art want a kind of new technical scheme can effectively improve CUT cutting complete
The success rate of pilot arc is converted to by cutting arc afterwards.
The content of the invention
Turn arc circuit and method it is an object of the invention to provide a kind of plasma cut, plasma can be effectively improved and cut
The success rate of pilot arc is converted to after the completion of cutting mill cutting by cutting arc.
In order to realize foregoing invention purpose, the present invention discloses a kind of plasma cut and turns arc circuit, it is characterised in that bag
Include：One sample circuit, the sample circuit is used to gather Hall current sampling feedback value；One comparison circuit, the comparison circuit is used for
Compare the output signal and a preset current value signal of the sample circuit, export a comparison signal；One pilot arc start-up circuit, uses
According to the comparison signal one pilot arc start-up circuit of unlatching；One processor, the processor monitors the comparison signal and this draws
The open signal of arc start-up circuit is led, the pilot arc start-up circuit is opened according to the comparison signal and the open signal.
Further, the preset current value signal is by being converted into a preset electricity after first resistor and second resistance partial pressure
Pressure value, the preset voltage values are connected with the positive pole of the comparison circuit.
Further, the Hall current sampling feedback value is adopted by being converted into one after 3rd resistor and the 4th electric resistance partial pressure
Sample magnitude of voltage, the sample voltage value is connected with the comparison circuit negative pole.
Further, the output end of the comparison circuit connects the pilot arc start-up circuit and processor.
Turn arc method present invention simultaneously discloses a kind of plasma cut, it is characterised in that including：Step one：Adopt
Collection cutting arc Hall current sampling feedback value exports a comparison signal after comparing with a preset current value, and letter is compared according to this
Number open a pilot arc start-up circuit；Step 2：Monitor the open signal of the comparison signal and the pilot arc start-up circuit；Step
Rapid three：The pilot arc start-up circuit is opened according to the comparison signal and the open signal.
Further, exported when the cutting arc Hall current sampling feedback value is less than the preset current value in the step one
One energizing signal, the pilot arc start-up circuit is opened according to the energizing signal.
Further, in the step 3 when the comparison signal is an energizing signal and the open signal is not opened,
Open the pilot arc start-up circuit.
Compared with prior art, pilot arc is directly opened with the comparative result of preset current value according to current sampling data to open
Dynamic circuit, the output signal of comparator is hardware signal, and fast response time, dynamic property is good, preferentially recognizes hardware signal.With this
Meanwhile, monitor this using processor and turn arc signal and pilot arc real-time status, when hardware does not have successful conversion into pilot arc, place
Reason device monitors that this turns pilot arc but virtual condition is cutting arc, and pilot arc is opened in now processor intervention so that turn arc success
Rate is greatly promoted.
Brief description of the drawings
Can be obtained further by following detailed description of the invention and institute's accompanying drawings on the advantages and spirit of the present invention
Solution.
Fig. 1 is the theory diagram that plasma cut disclosed in this invention turns arc circuit；
Fig. 2 is the detailed circuit diagram that plasma cut disclosed in this invention turns arc circuit；
Fig. 3 is the system flow chart that plasma cut disclosed in this invention turns arc circuit.
Specific embodiment
The specific embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Turn arc circuit it is an object of the invention to provide a kind of plasma cut, this turns arc circuit can be in plasma cut
After machine completes work piece cut, pilot arc is converted to from cutting arc, it is to avoid situation that is directly flame-out or being still cutting arc state.
As shown in figure 1, Fig. 1 is the theory diagram that plasma cut disclosed in this invention turns arc circuit.Original of the invention
Reason is that input comparator is compared simultaneously with current sampling signal by system intialization current value, according to result of the comparison, by hard
Part signal opens guiding arc circuit.Now whether microprocessor real-time monitoring has been switched on guiding arc circuit, if guiding arc circuit
It is not actuated, then unlatching hardware circuit signal is sent by microprocessor.
Fig. 2 is the detailed circuit diagram that plasma cut disclosed in this invention turns arc circuit.As shown in Fig. 2 plasma is cut
When cutting mill works, it is constant that cutting arc Hall current sampling feedback value IF maintains given electric current.After cutting terminates, plasma is cut
The nozzle of cutting mill gradually away from workpiece when, power output becomes big.When output current is not enough to maintain given electric current, current sample
Value of feedback IF can be declined with certain slope.When detecting sampled signal IF and dropping to certain value, preset current value IG can be less than,
Now comparator output is inverted, and comparator exports one turn of arc signal.Specifically, preset current value IG is through resistance R1, R2
Preset voltage values connection comparator positive pole is converted into after partial pressure, Hall current sampling feedback value IFG is after resistance R3, R4 partial pressure
Sample voltage value connection comparator negative pole is converted into, when sample voltage value is less than preset voltage values, comparator exports one turn
Arc signal, turns arc signal and directly initiates guiding arc circuit unlatching through diode ZD1.It is simultaneously same that Micro-processor MCV monitoring turns arc signal
When monitoring nozzle whether pilot arc is converted to by cutting arc, turn arc signal it is cutting that but nozzle is actually sent out if produced
Arc, then sent by Micro-processor MCV and turn arc signal.
Fig. 3 is the system flow chart that plasma cut disclosed in this invention turns arc circuit.Comprise the following steps that：S101 is opened
Begin；S102 system initializations and self-inspection flow；S103 monitors whether occur turning arc signal；If not occurring turning arc signal, after
Continuous monitoring, S104 is then entered if there is arc signal is turned；S104 judges whether arcuation state has been pilot arc, if it is
S106 thinks that successfully turning arc does not process, if otherwise S105 opens pilot arc, S107 terminates.
Compared with prior art, pilot arc is directly opened with the comparative result of preset current value according to current sampling data to open
Dynamic circuit, the output signal of comparator is hardware signal, and fast response time, dynamic property is good, preferentially recognizes hardware signal.With this
Meanwhile, monitor this using processor and turn arc signal and pilot arc real-time status, when hardware does not have successful conversion into pilot arc, place
Reason device monitors that this turns pilot arc but virtual condition is cutting arc, and pilot arc is opened in now processor intervention so that turn arc success
Rate is greatly promoted.
This scheme verifies that pilot arc and cutting turn arc and change 10000 times by many experiments, wherein unsuccessfully 5 times, success rate is
Up to 99.95%.
Simply preferred embodiment of the invention described in this specification, above example is only used to illustrate the present invention
Technical scheme rather than limitation of the present invention.All those skilled in the art pass through logic analysis, reasoning under this invention's idea
Or the limited available technical scheme of experiment, all should be within the scope of the present invention.
Claims (7)
1. a kind of CUT turns arc circuit, it is characterised in that including：
One sample circuit, the sample circuit is used to gather Hall current sampling feedback value；
One comparison circuit, the comparison circuit is used to compare the output signal and a preset current value signal of the sample circuit,
Export a comparison signal；
One pilot arc start-up circuit, for opening a pilot arc start-up circuit according to the comparison signal；
One processor, the processor monitors the open signal of the comparison signal and the pilot arc start-up circuit, according to
The comparison signal and the open signal open the pilot arc start-up circuit.
2. CUT as claimed in claim 1 turns arc circuit, it is characterised in that the preset current value signal passes through
It is converted into a preset voltage values after first resistor and second resistance partial pressure, the positive pole of the preset voltage values and the comparison circuit
Connection.
3. CUT as claimed in claim 1 turns arc circuit, it is characterised in that the Hall current sampling feedback value
By being converted into a sample voltage value after 3rd resistor and the 4th electric resistance partial pressure, the sample voltage value is negative with the comparison circuit
Pole connects.
4. CUT as claimed in claim 1 turns arc circuit, it is characterised in that the output end of the comparison circuit connects
Connect the pilot arc start-up circuit and processor.
5. a kind of CUT turns arc method, it is characterised in that including：
Step one：Collection cutting arc Hall current sampling feedback value exports a comparison signal, root after comparing with a preset current value
A pilot arc start-up circuit is opened according to the comparison signal；
Step 2：Monitor the open signal of the comparison signal and the pilot arc start-up circuit；
Step 3：The pilot arc start-up circuit is opened according to the comparison signal and the open signal.
6. CUT as claimed in claim 5 turns arc method, it is characterised in that cutting arc described in the step one
Hall current sampling feedback value exports an energizing signal when being less than the preset current value, according to the energizing signal is opened
Pilot arc start-up circuit.
7. CUT as claimed in claim 6 turns arc method, it is characterised in that when the comparing in the step 3
When signal is that an energizing signal and the open signal are not opened, the pilot arc start-up circuit is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089085.9A CN106825884A (en) | 2017-02-20 | 2017-02-20 | A kind of CUT turns arc circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089085.9A CN106825884A (en) | 2017-02-20 | 2017-02-20 | A kind of CUT turns arc circuit and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106825884A true CN106825884A (en) | 2017-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710089085.9A Pending CN106825884A (en) | 2017-02-20 | 2017-02-20 | A kind of CUT turns arc circuit and method |
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| Country | Link |
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| CN (1) | CN106825884A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807506A (en) * | 2018-12-30 | 2019-05-28 | 上海广为焊接设备有限公司 | For controlling the circuit of cutting machine cutting arc and pilot arc conversion |
| CN110064814A (en) * | 2019-05-28 | 2019-07-30 | 江苏航运职业技术学院 | A kind of arc initiation device of argon arc welding machine and striking method based on the arc initiation device |
| CN110102853A (en) * | 2019-05-28 | 2019-08-09 | 江苏航运职业技术学院 | A kind of device and method of arc generating of argon welder |
Citations (6)
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|---|---|---|---|---|
| JPS6226866B2 (en) * | 1980-05-31 | 1987-06-11 | Sansha Electric Mfg Co Ltd | |
| JPH0641035B2 (en) * | 1985-03-23 | 1994-06-01 | 大阪電気株式会社 | Plasma arc cutting device |
| CN202763266U (en) * | 2012-06-14 | 2013-03-06 | 周祎隆 | Novel ignited arc control device of plasma cutting machine |
| CN103350273A (en) * | 2013-06-18 | 2013-10-16 | 嘉兴力德数控科技有限公司 | Arc strike starting circuit of plasma cutting machine |
| CN104959721A (en) * | 2015-07-24 | 2015-10-07 | 上海沪工焊接集团股份有限公司 | Circuit and method for controlling guiding arc of plasma cutting machine |
| CN205869684U (en) * | 2016-07-18 | 2017-01-11 | 上海沪工焊接集团股份有限公司 | Plasma cutting machine guide arc control circuit |
-
2017
- 2017-02-20 CN CN201710089085.9A patent/CN106825884A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6226866B2 (en) * | 1980-05-31 | 1987-06-11 | Sansha Electric Mfg Co Ltd | |
| JPH0641035B2 (en) * | 1985-03-23 | 1994-06-01 | 大阪電気株式会社 | Plasma arc cutting device |
| CN202763266U (en) * | 2012-06-14 | 2013-03-06 | 周祎隆 | Novel ignited arc control device of plasma cutting machine |
| CN103350273A (en) * | 2013-06-18 | 2013-10-16 | 嘉兴力德数控科技有限公司 | Arc strike starting circuit of plasma cutting machine |
| CN104959721A (en) * | 2015-07-24 | 2015-10-07 | 上海沪工焊接集团股份有限公司 | Circuit and method for controlling guiding arc of plasma cutting machine |
| CN205869684U (en) * | 2016-07-18 | 2017-01-11 | 上海沪工焊接集团股份有限公司 | Plasma cutting machine guide arc control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807506A (en) * | 2018-12-30 | 2019-05-28 | 上海广为焊接设备有限公司 | For controlling the circuit of cutting machine cutting arc and pilot arc conversion |
| CN110064814A (en) * | 2019-05-28 | 2019-07-30 | 江苏航运职业技术学院 | A kind of arc initiation device of argon arc welding machine and striking method based on the arc initiation device |
| CN110102853A (en) * | 2019-05-28 | 2019-08-09 | 江苏航运职业技术学院 | A kind of device and method of arc generating of argon welder |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170613 |
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| WD01 | Invention patent application deemed withdrawn after publication |