CN104959720B - Air plasma cutter sequential control method - Google Patents
Air plasma cutter sequential control method Download PDFInfo
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- CN104959720B CN104959720B CN201510443477.1A CN201510443477A CN104959720B CN 104959720 B CN104959720 B CN 104959720B CN 201510443477 A CN201510443477 A CN 201510443477A CN 104959720 B CN104959720 B CN 104959720B
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- control method
- sequential control
- minor arc
- plasma cutter
- air plasma
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005520 cutting process Methods 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 235000018734 Sambucus australis Nutrition 0.000 description 2
- 244000180577 Sambucus australis Species 0.000 description 2
- OGFXBIXJCWAUCH-UHFFFAOYSA-N meso-secoisolariciresinol Natural products C1=2C=C(O)C(OC)=CC=2CC(CO)C(CO)C1C1=CC=C(O)C(OC)=C1 OGFXBIXJCWAUCH-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B23K10/006—Control circuits therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of air plasma cutter sequential control method, including switch step, striking state and minor arc state for switching the CUT, also include startup stage, for starting the CUT into striking state, in the startup stage, including step：Output driving current；The air valve is opened after waiting for the first time delay；Enter striking state after receiving the driving current, give striking electric current.Above-mentioned sequential control method, can effectively improve striking rate.
Description
Technical field
The present invention relates to the technical field of air plasma cutter, the more particularly to control of air plasma cutter sequential
System.
Background technology
Cutting, the generally referred to as cutting of metal.Plasma arc cutting is the plasma arc of high temperature using superfine, makes office
Portion's metal melts rapidly, then molten metal is blown away cutting method with air-flow.Plasma arc cutting because cutting efficiency is high,
The advantages of loss is low, applied widely is widely used in the industries such as all kinds of engineering constructions, manufacture.
Air plasma cutter, typically there is two kinds of starting the arc modes, contact and transferred arc formula.Transferred arc formula arc cuts
Power positive end is connected on nozzle by certain resistance and relay switch so that electric arc is formed between pole pin and nozzle, so
Afterwards nozzle is just formed the bigger electric arc of energy, electric arc quilt on the workpiece of direct joining power anode between pole pin and workpiece
Plasma arc is formed after compression, and nozzle is disconnected with coupling for power positive end, starts cutting.
Therefore air plasma cutter, especially non-high frequency CUT, operationally, initially enter striking shape
State, then switches between striking state and minor arc state.For the resistance in protecting cutting gun and arc ignition circuit, striking shape
The striking electric current given under state is smaller.Minor arc state is used to carry out cutting task, and given minor arc electric current can enter as needed
Row regulation is typically bigger than striking electric current.When two states are switched over, big electricity is produced under striking state sometimes
Stream, so as to cutting gun will be damaged, and influences arcing initiation success rate.
The content of the invention
Based on this, it is necessary to for the problem of the above-mentioned generation high current under striking state, there is provided a kind of air plasma
Cutting machine sequential control method.
A kind of air plasma cutter sequential control method, including switch step, for switching the plasma cut
The striking state and minor arc state of machine, also including startup stage, for starting the CUT into striking state,
In the startup stage, including step：
Output driving current；
The air valve is opened after waiting for the first time delay；
Enter striking state after receiving the driving current, give striking electric current.
Wherein in one embodiment, in the switch step, including step：
Detection minor arc signal；
Waited for the first stand-by period；
If within first stand-by period, the minor arc signal is consecutively detected always, then into minor arc state, give
Minor arc electric current；
If not detecting the minor arc signal again, the striking state is kept.
Wherein in one embodiment, also including ending phase, the ending phase is used for blow-out；
Also include waiting for the second stand-by period in the detection minor arc signals step, if in second stand-by period
Do not detect the minor arc signal inside, then into the ending phase the step of.
Wherein in one embodiment, also including ending phase, the ending phase is used for blow-out；
Also include step in the switch step：
Detection minor arc signal,
Waited for the second stand-by period,
If not detecting the minor arc signal within the second stand-by period, the step of into the ending phase.
Wherein in one embodiment, in the ending phase, also including step：
Close driving current；
The air valve is closed after waiting for the second time delay.
Wherein in one embodiment, before the startup stage is the step of output driving current, also including step：
Close the air valve；
Waited for the 3rd time delay.
Wherein in one embodiment, the air plasma cutter sequential control method, is by chip microcontroller.
Wherein in one embodiment, first stand-by period is 0.1 second to 0.5 second.
The above method is by one time of stabilization of driving current, i.e. the first time delay, then opens air valve, Ke Yiyou
Improve striking rate in effect ground.
Brief description of the drawings
The step of Fig. 1 is the air plasma cutter sequential control method of first embodiment flow chart；
The step of Fig. 2 is the air plasma cutter sequential control method of second embodiment flow chart；
The step of Fig. 3 is the air plasma cutter sequential control method of 3rd embodiment flow chart；
The step of Fig. 4 is the air plasma cutter sequential control method of fourth embodiment flow chart；
The step of Fig. 5 is the air plasma cutter sequential control method of the 5th embodiment flow chart.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.Elaborate many details in order to fully understand this hair in the following description
It is bright.But the present invention can be implemented with being much different from other manner described here, and those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited by following public specific implementation.
Fig. 1 is referred to, flow the step of be the air plasma cutter sequential control method of first embodiment of the invention
Figure.As illustrated, the air plasma cutter sequential control method includes startup stage S100 and switch step S200.Work as sky
Gas CUT prepares cutting, presses cutting gun switch, and into startup stage S100, the startup stage 100 includes step
S110 output driving currents, step S120 waits the first time delay T1After open air valve, after driving current is received, hold
Row step S130 enters striking state, gives striking electric current.Under striking state, into switch step S200, the switch step
S200 detects whether there is minor arc signal including step S210, if detecting minor arc signal, performs step S220, enters
Minor arc state, gives minor arc electric current, starts cutting.If not detecting minor arc signal, striking state is maintained at.In minor arc
Under state, i.e., when work is cut, step S230 can be also performed, judge whether to detect striking signal.If detected
Striking signal, then terminate cutting, and switching state gives striking electric current to striking state.If not detecting striking signal, just
Minor arc state is kept, continues to cut.
Successfully need two conditions due to striking, one is pwm signal to be had, that is, driving current, and two is that air valve will be beaten
Open, there is airflow.The air plasma cutter sequential control method of the embodiment, after waiting output driving current, waits the
One time delay T1, such as postpone 0.1 second~0.5 second, it is therefore preferable to 0.1 second, air valve, Ke Yiyou are opened again after electric current is stable
Improve striking rate in effect ground.
Fig. 2 is referred to, flow the step of be the air plasma cutter sequential control method of second embodiment of the invention
Figure.As illustrated, the air plasma cutter sequential control method is in switch step S200, when also setting the first wait
Between T2, enter minor arc state step S220 is performed, before giving minor arc electric current, also including step S211 in the first stand-by period T2
It is interior, judge whether to be consecutively detected minor arc signal.If after first time detects minor arc signal, in the first stand-by period T2It is interior
Minor arc signal is consecutively detected, has then been performed step S220 and is entered minor arc state, given minor arc electric current, cut.If
After detecting minor arc signal for the first time, in the first stand-by period T2Do not detect minor arc signal again inside, detected before explanation
Minor arc signal be likely to simply individual interference, then keep striking state.So, by the first stand-by period T2Stabilization sentence
It is disconnected, can avoid being performed due to the interference that shake is caused the cutting task of mistake.First stand-by period T2Setting, it is impossible to
It is long can not be too short, it is long if, can cause striking turn minor arc reaction it is too slow；If too short, the effect on driving birds is not good of stabilization,
Therefore need to be tested according to system situation.Wherein in one embodiment, first stand-by period T2Can for 0.1 second~
0.5 second, it is therefore preferable to 0.2 second.
Fig. 3 is referred to, flow the step of be the air plasma cutter sequential control method of third embodiment of the invention
Figure.As illustrated, the air plasma cutter sequential control method is when step S210 detects whether to exist minor arc signal, if
The second stand-by period T is determined3, i.e., in the second stand-by period T3In time, detect whether there is minor arc signal.If second etc.
Treat time T3Minor arc signal is inside detected, is then performed step S220 and is entered minor arc state, give minor arc electric current, start cutting.
If in the second stand-by period T3Do not detect minor arc signal inside, namely there is no cutting task, then into ending phase S300,
Step S310 blow-outs are performed, into resting state.This air plasma cutter sequential control method, by setting second etc.
Treat time T3, can preferably protect arc ignition circuit and cutting gun, it is to avoid cutting machine is in striking state for a long time, causes striking
Keep electric current to pass through on circuit for a long time, and its life-span is lost.Second stand-by period T3Can bearing according to arc ignition circuit
Ability and performance and determine, and can be adjusted according to the concrete condition of cutting.5 seconds~20 seconds can generally be selected, preferably
Ground is 10 seconds.
Wherein in one embodiment, if in the second stand-by period T3In detect minor arc signal, then perform step
Judge in the first stand-by period T2Whether inside it is continued for detecting minor arc signal, now the second stand-by period T3Continue timing, such as
Fruit is in the first stand-by period T2Minor arc signal is not continuously detected inside, then the minor arc signal detected before judging is dry as shake
Disturb, if now continuing the second stand-by period T of timing3Time has arrived, then the step of execution ending phase.If now
Continue the second stand-by period T of timing3Time do not arrive also, then continue waiting for second stand-by period T3Remaining time, inspection
Whether survey detects minor arc signal within the remaining time.So can more optimize the time of striking wait, it is to avoid due to length
The shaking interference of time, and cause constantly persistently to detect minor arc signal, cause cutting machine for a long time in striking state, infringement
Welding gun.
Fig. 4 is referred to, flow the step of be the air plasma cutter sequential control method of fourth embodiment of the invention
Figure.As illustrated, in ending phase S300, step S310 blow-outs can also include that sub-step S311 closes driving current, i.e.,
Pwm signal is closed, and step S312 waits the second time delay T4, close air valve.When in step S212 in the second wait
Between T3Minor arc signal is inside detected, then performs step S211 in the first stand-by period T2Whether inside minor arc is consecutively detected always
Signal, if not being continuously detected minor arc signal, returns to striking state, continues to detect.If detecting minor arc
Signal, then perform step S210 and enter minor arc state.If in the second stand-by period T3It is interior, minor arc signal is not detected, then
Perform step S311 and close driving current, the second time delay T is then postponed again4Afterwards, air valve is closed.So, in ending phase
In S300, by SECO, driving current is first closed, then postpone the second time delay T4After close air valve, delayed to die, energy
Enough ensure the stability of cutting machine, improve its security, it is to avoid air valve is closed before driving current is closed, and causes the damage of cutting gun
It is bad.Wherein in one embodiment, second time delay T4It can be 10 seconds~20 seconds, it is therefore preferable to 15 seconds.So can
The nozzle of quick cooling cutting gun, extends rifle nozzle life.
Referring to Fig. 5, flow chart the step of be the air plasma cutter sequential control method of fifth embodiment of the invention.
In startup stage S100, before step S110 output driving currents, increased step S101 and close air valve, and step S102 etc.
Treat the 3rd time delay T5.I.e. after cutting gun switch is opened, air valve is immediately closed off, the 3rd time delay T is then waited again5, than
Such as postpone the time of 0.5 second~1.5 seconds, it is therefore preferable to after 1 second, then output driving current.It is delayed due to existing in ending phase
Die, thus cutting gun switch press when, air valve may be in it is delayed die the stage, so increased step S101 closing
Air valve, after cutting gun switch is pressed, first closes a lower air valve at once, then waits for a period of time again, is emptied completely gas,
For striking is prepared.Output driving current again afterwards.Can so avoid in cutting work switching frequently, cutting gun switch is frequent
In the case of cut-offfing, the risk triggered due to delayed dying.And striking efficiency can be improved.
Wherein in one embodiment, the air plasma cutter sequential control method is realized by Single-chip Controlling
's.Compared to the SECO of machinery, programmed by scm software, enable to control more precisely, reliability and stabilization
Property is higher.
Wherein in one embodiment, the air plasma cutter sequential control method, can be used for non-high frequency etc. from
Sub- cutting machine.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of air plasma cutter sequential control method, including switch step, for switching the CUT
Striking state and minor arc state, it is characterised in that also including startup stage, enter for starting the CUT and draw
Arcuation state, in the startup stage, including step：
Output driving current；
Air valve is opened after waiting for the first time delay；
Enter striking state after receiving the driving current, give striking electric current；
In the switch step, including step：
Detection minor arc signal；
Waited for the first stand-by period；
If within first stand-by period, the minor arc signal is consecutively detected always, then into minor arc state, minor arc is given
Electric current；
If not detecting the minor arc signal again, the striking state is kept.
2. air plasma cutter sequential control method according to claim 1, it is characterised in that also including terminating rank
Section, the ending phase is used for blow-out；
Also include waiting for the second stand-by period in the detection minor arc signals step, if do not had within second stand-by period
Detect the minor arc signal, then into the ending phase the step of.
3. air plasma cutter sequential control method according to claim 1, it is characterised in that also including terminating rank
Section, the ending phase is used for blow-out；
Also include step in the switch step：
Detection minor arc signal,
Waited for the second stand-by period,
If not detecting the minor arc signal within the second stand-by period, the step of into the ending phase.
4. the air plasma cutter sequential control method according to Claims 2 or 3, it is characterised in that in the knot
In the beam stage, also including step：
Close driving current；
The air valve is closed after waiting for the second time delay.
5. air plasma cutter sequential control method according to claim 4, it is characterised in that the startup stage
Before the step of output driving current, also including step：
Close the air valve；
Waited for the 3rd time delay.
6. the air plasma cutter sequential control method according to claim 2 to 3 any one, it is characterised in that
The air plasma cutter sequential control method, is by chip microcontroller.
7. air plasma cutter sequential control method according to claim 4, it is characterised in that described air etc. from
Sub- cutting machine sequential control method, is by chip microcontroller.
8. air plasma cutter sequential control method according to claim 5, it is characterised in that described air etc. from
Sub- cutting machine sequential control method, is by chip microcontroller.
9. air plasma cutter sequential control method according to claim 1, it is characterised in that described first waits
Time is 0.1 second to 0.5 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510443477.1A CN104959720B (en) | 2015-07-24 | 2015-07-24 | Air plasma cutter sequential control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510443477.1A CN104959720B (en) | 2015-07-24 | 2015-07-24 | Air plasma cutter sequential control method |
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| Publication Number | Publication Date |
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| CN104959720A CN104959720A (en) | 2015-10-07 |
| CN104959720B true CN104959720B (en) | 2017-06-23 |
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| CN201510443477.1A Expired - Fee Related CN104959720B (en) | 2015-07-24 | 2015-07-24 | Air plasma cutter sequential control method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107598348B (en) * | 2016-07-12 | 2020-08-04 | 上海沪工焊接集团股份有限公司 | Sequential control method of air plasma cutting machine |
| CN111545883A (en) * | 2020-05-14 | 2020-08-18 | 上海气焊机厂有限公司 | Cutting machine control method and control device |
| CN111872532B (en) * | 2020-08-20 | 2022-03-11 | 深圳市佳士科技股份有限公司 | Cutting machine control device and low-frequency arc striking plasma cutting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173793C (en) * | 2002-04-04 | 2004-11-03 | 上海工程技术大学 | Digital signal control system for microbeam plasma welding machine |
| CN2808401Y (en) * | 2005-08-08 | 2006-08-23 | 吴建中 | Flexible arcing controller of inverted plasma cutting machine |
| CN201625832U (en) * | 2009-11-23 | 2010-11-10 | 深圳市瑞凌实业股份有限公司 | Inverter plasma cutting machine with lead arc control device |
| CN201669505U (en) * | 2010-05-14 | 2010-12-15 | 上海东升焊接集团有限公司 | Multifunctional plasma arc welding machine based on PLC controller |
| CN202780198U (en) * | 2012-07-18 | 2013-03-13 | 广州亦高电气设备有限公司 | Plasma cutting machine capable of outputting arc strike signals |
| CN103920979B (en) * | 2014-05-01 | 2015-12-09 | 湖南超宇科技有限公司 | A kind of air plasma cutter flow rate controlling method |
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Granted publication date: 20170623 |