CN107962279A - The anti-sticking welding rod function control method of electric welding machine and electric welding machine - Google Patents
The anti-sticking welding rod function control method of electric welding machine and electric welding machine Download PDFInfo
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- CN107962279A CN107962279A CN201711097108.7A CN201711097108A CN107962279A CN 107962279 A CN107962279 A CN 107962279A CN 201711097108 A CN201711097108 A CN 201711097108A CN 107962279 A CN107962279 A CN 107962279A
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- welding machine
- electric welding
- control
- sticking
- output
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Classifications
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- 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
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0953—Monitoring or automatic control of welding parameters using computing means
-
- 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
- B23K9/0672—Starting the arc without direct contact between electrodes
- B23K9/0673—Ionisation of the arc gap by means of a tension with a step front (pulses or high frequency tensions)
Abstract
The present invention discloses a kind of anti-sticking welding rod function control method of electric welding machine and electric welding machine, wherein, the anti-sticking welding rod function control method of electric welding machine comprises the following steps：S100, when receiving the enabling signal of electric welding machine, control pwm control circuit output PWM ripples, make electric welding machine enter starting the arc state；S200, obtains the duty when width duration time of PWM ripples；S300, judges whether the duty cycle of PWM ripples is less than default duty cycle, and, whether the width duration time of PWM ripples is more than preset durations；If so, then performing step S400, control electric welding machine enters anti-sticking bar state；If it is not, then performing step S500, control electric welding machine enters normal weld state.Technical solution of the present invention has the characteristics that cost is low.
Description
Technical field
The present invention relates to electric welding machine technical field, the anti-sticking welding rod function control method of more particularly to a kind of electric welding machine and electric welding
Machine.
Background technology
In electric welding machine field, manual electric arc welding needs to be welded with welding rod.When the starting the arc, it usually needs larger output
Electric current, lights welding rod, hence into normal welded condition.When the starting the arc is unsuccessful, if continuing to output high current, welding rod
It is easy to stick together with workpiece, leads to not be subjected to again.Starting the arc adhesive-proof strip function, exactly when detecting welding rod
A period of time is contacted with workpiece, output current is actively reduced, prevents welding rod from sticking together with workpiece.
Existing adhesive-proof strip function realizing method, it usually needs electric welding machine output electricity is gathered by output voltage detecting circuit
Pressure, when output voltage is consistently less than a certain magnitude of voltage, by pwm control circuit, adjusts pwm pulse width, makes electric welding machine defeated
Go out current reduction, prevent welding rod from being clung with workpiece.
This to design output voltage detecting circuit and voltage isolation circuit, it is necessary to extra, cost is higher.
The content of the invention
The main object of the present invention is to provide a kind of anti-sticking welding rod function control method of electric welding machine, it is intended to reduces electric welding machine
Adhesive-proof strip control cost.
To achieve the above object, the present invention proposes a kind of anti-sticking welding rod function control method of electric welding machine, the electric welding machine bag
Pwm control circuit is included, the pwm control circuit is used to export PWM ripples, to control the size of electric welding machine output voltage, the electricity
The anti-sticking welding rod function control method of welding machine comprises the following steps：
S100, when receiving the enabling signal of electric welding machine, controls the pwm control circuit output PWM ripples, makes electric welding machine
Into starting the arc state；
S200, obtains the duties of the PWM ripples when width duration time；
S300, judges whether the duty cycle of the PWM ripples is less than default duty cycle, and, the pulsewidth of the PWM ripples continues
Whether the time is more than preset durations；
If so, then performing step S400, control electric welding machine enters anti-sticking bar state；
If it is not, then performing step S500, control electric welding machine enters normal weld state.
Preferably, the step S100 is specifically included：
S110, when receiving the enabling signal of electric welding machine, control electric welding machine starts；
S120, judges whether electric welding machine has output current；
If so, then performing step S130, the pwm control circuit output PWM ripples are controlled, and control the output electricity of electric welding machine
Stream is increased to the first preset value, electric welding machine is entered starting the arc state；
If it is not, then performing step S140, control electric welding machine maintains light condition.
Preferably, the value range of first preset value in 200A between 250A.
Preferably, the control electric welding machine is specifically included into anti-sticking bar state：
S410, controls the output current of electric welding machine to be decreased to the second preset value, and controls electric welding machine welding rod to be separated with workpiece；
S420, judges whether electric welding machine has output current；
If so, then jump to the step S410；
If it is not, then performing step S430, control motor enters light condition, and jumps to the step S120.
Preferably, second preset value is chosen as 50A.
Preferably, the default duty cycle is between 7% to 9%.
Preferably, the preset durations in 100ms between 300ms.
Corresponding, the present invention also proposes a kind of electric welding machine, including pwm control circuit, memory, processor and is stored in institute
State in memory, and the control program for the electric welding machine that can be run in the processor；When the control program quilt of the electric welding machine
The step of electric welding machine as described above anti-sticking welding rod function control method is realized when being performed in the processor.
Preferably, the pwm control circuit, the memory and the processor are integrated in control chip, the electricity
Welding machine further includes input rectifying filter circuit, inverter circuit, output rectifier and filter, current sampling circuit and drive circuit；
Wherein, the output terminal of the input rectifying filter circuit is connected with the input terminal of the inverter circuit, the inverter circuit it is defeated
Outlet is connected with the input terminal of the output rectifier and filter, the output terminal of the output rectifier and filter and the electric current
The input terminal connection of sample circuit, the output terminal of the current sampling circuit is connected with the input terminal of the control chip, described
The output terminal of control chip is connected with the input terminal of the drive circuit, and the output terminal of the drive circuit is used to export inversion electricity
The control signal of switching device in road.
The duty cycle for the PWM ripples that technical solution of the present invention is exported according to pwm control circuit obtains the output voltage of electric welding machine,
And judge whether to need to open adhesive-proof strip function accordingly, reliability is high.Also, since the technical program is without directly collection electric welding
The output voltage of machine, therefore, when designing corresponding control circuit of electric welding machine, without extra output voltage detecting circuit and electricity
Isolation circuit is pressed, cost is relatively low.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Structure according to these attached drawings obtains other attached drawings.
Fig. 1 is the flow diagram of anti-sticking one embodiment of welding rod function control method of electric welding machine of the present invention；
Fig. 2 is the flow diagram of the anti-sticking another embodiment of welding rod function control method of electric welding machine of the present invention；
Fig. 3 is the electrical block diagram of one embodiment of electric welding machine of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, belongs to the scope of protection of the invention.
It is to be appreciated that the description for being related to " first ", " second " etc. in the present invention is only used for description purpose, without being understood that
To indicate or implying its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution
Conflicting or can not realize when occur will be understood that the combination of this technical solution is not present, also not in the guarantor of application claims
Within the scope of shield.
Electric welding machine works after unlatching generally according to following flow：
First, into starting the arc state；Then, into normal weld state；Finally, when receiving shutdown command, terminate
Welded condition.
Wherein, when electric welding machine is in starting the arc state, one is exactly than more typical feature, the output current of electric welding machine compared with
Greatly, output voltage is smaller.When electric welding machine is in normal weld state, one is exactly than more typical feature, electric welding machine it is defeated
It is larger to go out electric current, output voltage is also larger.
The different characteristic according to possessed by above-mentioned electric welding machine is in different conditions, can know the working status of electric welding machine.
For example detecting that the output current of electric welding machine is larger, output voltage is smaller, then can confirm that electric welding machine is in starting the arc state.
However, in electric welding machine Igniting pattern, since output current is larger, output voltage is smaller, is similar to output short-circuit,
There is a phenomenon where stick.It after electric welding machine stick, successfully cannot enter normal weld state from starting the arc state, influence
Work.For this reason, the present invention proposes a kind of anti-sticking welding rod function control method of electric welding machine, go out to avoid electric welding machine in Igniting pattern
The phenomenon of existing stick.
Referring to Fig. 1, in one embodiment, the starting-up method of electric welding machine comprises the following steps：
S100, when receiving the enabling signal of electric welding machine, control pwm control circuit output PWM ripples, enter welding machine
Arcuation state；
The enabling signal of electric welding machine may come from the switch controller of electric welding machine, and the switch controller of electric welding machine can be
Mechanical switch on electric welding machine, the remote controler connected with electric welding machine communication, etc..
Referring to Fig. 2, in one embodiment, above-mentioned steps S100 is specific as follows：
S110, when receiving the enabling signal of electric welding machine, control electric welding machine starts；
S120, judges whether electric welding machine has output current；
If so, step S130 is then performed, control pwm control circuit output PWM ripples, and control the output current of electric welding machine to increase
Greatly to the first preset value, electric welding machine is set to enter starting the arc state；
If it is not, then performing step S140, control electric welding machine maintains light condition.
Upon actuation, if workpiece needs to weld, then electric welding machine has electric current output to electric welding machine, if needed without workpiece
Welding, then electric welding machine does not have electric current output, in light condition.Therefore, can be by detecting whether electric welding machine has output current
To determine whether there is workpiece to need to weld, so as to be confirmed whether to need to control the electric welding machine starting the arc.That is, if electric welding machine has output electricity
Stream, then confirmation has workpiece to need to weld, it is necessary to control the electric welding machine starting the arc；If electric welding machine does not have output current, then confirms
There is no workpiece to need to weld, it is not necessary to control the electric welding machine starting the arc, control electric welding machine maintains light condition.
It should be noted that in the present embodiment, the electric welding machine starting the arc is controlled, exactly controls the output current of electric welding machine to increase rapidly
Greatly.Output current on controlling electric welding machine increases to any degree, can be set according to the welding rod size of electric welding machine.Such as
The welding rod of electric welding machine is smaller, then the output current of corresponding electric welding machine is also smaller；The welding rod of electric welding machine is larger, then corresponding electric welding
The output current of machine is also larger.
According to the Size Distribution rule of electric welding machine welding rod, generally, when controlling electric welding machine to enter starting the arc state, control electricity
The output current of welding machine increases to 200A between 250A, to meet the needs of in the market most of welding machines, strengthens versatility.Can
With understanding, according to the inventive concept of the technical program, for various sizes of welding rod, the defeated of adjustment electric welding machine can be corresponded to
Go out electric current, the output current value of electric welding machine is not particularly limited herein.
Understood according to the above, it is necessary to electric welding machine stick be prevented, so that electric welding machine after electric welding machine enters starting the arc state
Successfully normal operating conditions is entered from starting the arc state.In one embodiment, can by detect electric welding machine output voltage and
Output current judges whether electric welding machine is in starting the arc state, and electric welding machine whether stick.
Specifically, it is larger in the output current for detecting electric welding machine, and when output current is smaller, judge that electric welding machine is in
Starting the arc state；Detect electric welding machine be in starting the arc state time it is longer when, judge that electric welding machine may stick.That is, herein
During, it is necessary to use following three parameter：The output current of electric welding machine, the output voltage of electric welding machine and electric welding machine are in
The duration of arcuation state.After starting the starting the arc due to electric welding machine, output current is just larger always, therefore, need to only detect electricity herein
The output voltage and electric welding machine of welding machine are in the duration of starting the arc state, to judge whether to need to open adhesive-proof strip function.
The duration of starting the arc state is on how to detect the output voltage of electric welding machine and electric welding machine, in the present invention one
In embodiment, comprise the following steps：
S200, obtains the duties of the PWM ripples when width duration time；
S300, judges whether the duty cycle of the PWM ripples is less than default duty cycle, and, the pulsewidth of the PWM ripples continues
Whether the time is more than preset durations.
Here, it should be noted that the output voltage size of electric welding machine is influenced by pwm control circuit.Generally, PWM
The duty cycle of the PWM ripples of control circuit output is bigger, and the output voltage of electric welding machine is bigger, the PWM ripples of pwm control circuit output
Duty cycle is smaller, and the output voltage of electric welding machine is smaller.
That is, the present embodiment can know the output voltage size of electric welding machine by the duty cycle of PWM ripples.That is,
When the duty cycle of PWM ripples is less than default duty cycle, the output voltage of electric welding machine is less than the voltage of electric welding machine normal weld.
Wherein, the average voltage of electric welding machine normal weld generally in 20V between 30V.In the present embodiment, when PWM ripples
When duty cycle is less than default duty cycle, show that the current output voltage of electric welding machine is less than 20V.Accordingly, it is readily appreciated that, preset duty
The value of ratio can be set according to the size of electric welding machine input supply voltage.For example electric welding machine input supply voltage is 1KV, then in advance
If the value of duty cycle is chosen as 2%, alternatively, electric welding machine input supply voltage is 500V, then the value for presetting duty cycle is optional
For 4%.It is 220V mostly in view of network voltage, namely the input supply voltage of electric welding machine is 220V, therefore, this implementation mostly
In example, default duty cycle is preferably 8%.In view of voltage ripple of power network, it is preferred that the value of default duty cycle can be selected in 7%
To between 9%.
In addition, the width duration time of the PWM ripples of pwm control circuit output is longer, electric welding machine is in holding for starting the arc state
The continuous time is longer.
That is, the present embodiment by the duty cycle of PWM ripples can know electric welding machine be in starting the arc state it is lasting when
Between.That is, when the width duration time of PWM ripples is more than preset durations, electric welding machine may be the phenomenon for occurring stick.
Wherein, preset durations can be selected in 100ms between 300ms, it is preferred that preset durations are 200ms.Can
With understanding, if preset durations are too short, easily judge by accident；If preset durations are long, easily glue
Bar.
In one embodiment, after confirming the normal starting the arc of electric welding machine, step S500 is can perform, control electric welding machine enters normal weldering
Connect state.After the possible stick of electric welding machine electric welding machine is confirmed, step S400 is can perform, control electric welding machine enters anti-sticking bar state.
On how to control electric welding machine to enter anti-sticking bar state, then perform in accordance with the following steps：
S410, controls the output current of electric welding machine to be decreased to the second preset value, and controls electric welding machine welding rod to be separated with workpiece；
S420, judges whether electric welding machine has output current；
If so, then jump to the step S410；
If it is not, then performing step S430, control motor enters light condition, and jumps to the step S120.
, it is necessary to reduce the output current of electric welding machine, to prevent stick after the possible stick of electric welding machine is confirmed.Specifically, may be used
The output current of electric welding machine is first decreased to the second preset value, the output current of electric welding machine is progressively then reduced to zero.To
After the output current of electric welding machine is reduced to zero, control electric welding machine enters light condition, and jumps to above-mentioned steps S120.
Corresponding, the present invention also proposes a kind of electric welding machine, including pwm control circuit (not shown), memory are (not shown
Go out), processor (not shown) and be stored in memory, and the control program for the electric welding machine that can be run within a processor；When
The control program of electric welding machine realizes the step of electric welding machine as above anti-sticking welding rod function control method when being performed in processor.
It is preferred that referring to Fig. 3, pwm control circuit, memory and processor are integrated in 50 in control chip, electric welding machine
Further include input rectifying filter circuit 10, inverter circuit 20, output rectifier and filter 30, current sampling circuit 40 and driving electricity
Road 60；Wherein, the output terminal of input rectifying filter circuit 10 is connected with the input terminal of inverter circuit 20, the output of inverter circuit 20
End is connected with the input terminal of output rectifier and filter 30, the output terminal of output rectifier and filter 30 and current sampling circuit
40 input terminals connect, and the output terminal of current sampling circuit 40 is connected with the input terminal of control chip 50, the output of control chip 50
End is connected with the input terminal of drive circuit 60, and the output terminal of drive circuit 60 is used to export (the figure of switching device in inverter circuit 20
Be not shown) control signal.
The duty cycle for the PWM ripples that technical solution of the present invention is exported according to pwm control circuit obtains the output voltage of electric welding machine,
And judge whether to need to open adhesive-proof strip function accordingly, reliability is high.Also, since the technical program is without directly collection electric welding
The output voltage of machine, therefore, when designing corresponding control circuit of electric welding machine, without extra output voltage detecting circuit and electricity
Isolation circuit is pressed, cost is relatively low.
The foregoing is merely the preferred embodiment of the present invention, is not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in the scope of patent protection of the present invention.
Claims (9)
1. a kind of anti-sticking welding rod function control method of electric welding machine, it is characterised in that the electric welding machine includes pwm control circuit, institute
State pwm control circuit to be used to export PWM ripples, to control the size of electric welding machine output voltage, the anti-sticking welding rod function of electric welding machine
Control method comprises the following steps：
S100, when receiving the enabling signal of electric welding machine, controls the pwm control circuit output PWM ripples, enters electric welding machine
Starting the arc state；
S200, obtains the duties of the PWM ripples when width duration time；
S300, judges whether the duty cycle of the PWM ripples is less than default duty cycle, and, the width duration time of the PWM ripples
Whether preset durations are more than；
If so, then performing step S400, control electric welding machine enters anti-sticking bar state；
If it is not, then performing step S500, control electric welding machine enters normal weld state.
2. the anti-sticking welding rod function control method of electric welding machine as claimed in claim 1, it is characterised in that the step S100 is specific
Including：
S110, when receiving the enabling signal of electric welding machine, control electric welding machine starts；
S120, judges whether electric welding machine has output current；
If so, then performing step S130, the pwm control circuit output PWM ripples are controlled, and control the output current of electric welding machine to increase
Greatly to the first preset value, electric welding machine is set to enter starting the arc state；
If it is not, then performing step S140, control electric welding machine maintains light condition.
3. the anti-sticking welding rod function control method of electric welding machine as claimed in claim 2, it is characterised in that first preset value
Value range is in 200A between 250A.
4. the anti-sticking welding rod function control method of electric welding machine as claimed in claim 2, it is characterised in that it is described control electric welding machine into
Enter anti-sticking bar state to specifically include：
S410, controls the output current of electric welding machine to be decreased to the second preset value, and controls electric welding machine welding rod to be separated with workpiece；
S420, judges whether electric welding machine has output current；
If so, then jump to the step S410；
If it is not, then performing step S430, control motor enters light condition, and jumps to the step S120.
5. the anti-sticking welding rod function control method of electric welding machine as claimed in claim 4, it is characterised in that second preset value can
Elect 50A as.
6. the anti-sticking welding rod function control method of electric welding machine as described in claim 1-5 any one, it is characterised in that described pre-
If duty cycle is between 7% to 9%.
7. the anti-sticking welding rod function control method of electric welding machine as described in claim 1-5 any one, it is characterised in that described pre-
If the duration is in 100ms between 300ms.
8. a kind of electric welding machine, it is characterised in that including pwm control circuit, memory, processor and be stored in the memory
It is interior, and the control program for the anti-sticking welding rod function of electric welding machine that can be run in the processor；
Realized when being performed during the control program of the electric welding machine is by the processor as described in claim 1-7 any one
The step of electric welding machine anti-sticking welding rod function control method.
9. electric welding machine as claimed in claim 8, it is characterised in that the pwm control circuit, the memory and the processing
Device is integrated in control chip, and the electric welding machine further includes input rectifying filter circuit, inverter circuit, output rectification filter electricity
Road, current sampling circuit and drive circuit；Wherein,
The output terminal of the input rectifying filter circuit is connected with the input terminal of the inverter circuit, the output of the inverter circuit
End is connected with the input terminal of the output rectifier and filter, and the output terminal of the output rectifier and filter is adopted with the electric current
The input terminal connection of sample circuit, the output terminal of the current sampling circuit are connected with the input terminal of the control chip, the control
The output terminal of coremaking piece is connected with the input terminal of the drive circuit, and the output terminal of the drive circuit is used to export inverter circuit
The control signal of middle switching device.
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| CN201711097108.7A CN107962279B (en) | 2017-11-08 | 2017-11-08 | The anti-sticking welding rod function control method of electric welding machine and electric welding machine |
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|---|---|---|---|
| CN201711097108.7A CN107962279B (en) | 2017-11-08 | 2017-11-08 | The anti-sticking welding rod function control method of electric welding machine and electric welding machine |
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| CN107962279B CN107962279B (en) | 2019-09-24 |
Family
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| CN107962279B (en) | 2019-09-24 |
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