CN109877421A - Welding gun control method and its control system - Google Patents
Welding gun control method and its control system Download PDFInfo
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- CN109877421A CN109877421A CN201910208099.7A CN201910208099A CN109877421A CN 109877421 A CN109877421 A CN 109877421A CN 201910208099 A CN201910208099 A CN 201910208099A CN 109877421 A CN109877421 A CN 109877421A
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- 238000003466 welding Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010891 electric arc Methods 0.000 claims abstract description 18
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 206010057071 Rectal tenesmus Diseases 0.000 abstract description 5
- 208000012271 tenesmus Diseases 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The present invention provides a kind of welding gun control method and its control system, welding gun carries out tracking welding by balladeur train control, and control method is comprising steps of control balladeur train adjusts welding gun to initial position；Power supply is opened, the initial voltage V2 that the welding gun is located at produced electric arc when the initial position is collected and recorded；Set fluctuation voltage V4；Starting welding, the real-time voltage V0 of electric arc caused by the welding gun is acquired according to the real-time height tracing of the welding gun at work；Calculate the pressure difference Vx of the real-time voltage V0 Yu initial voltage V2；When judging that the pressure difference Vx is less than the fluctuation voltage V4, controls the welding gun and work on；When judging that the pressure difference Vx is greater than or equal to the fluctuation voltage V4, controls the welding gun and stop working.The control method substantially reduces in welding process because thinking the degree intervened caused by workpiece burn-through, improves Automation of Welding degree, improves working efficiency, avoids the danger for generating welding gun tenesmus, saved production cost, more economical and efficient.
Description
Technical field
The invention belongs to industrial automation more particularly to a kind of welding gun control methods.
Background technique
In automatic welding work, especially when carrying out girth welding, since welded piece there may be such as group
Team's precision is high, the problems such as machining accuracy is not high, may cause welding gun in the welding process height direction run trace not
The case where capable of being fitted completely with institute's welder's part, and then being easy to happen welding gun tenesmus, gently then lead to workpiece appearance of weld unsightly, weight
The case where serious wastes cost such as then will lead to scrap of the product, break welding gun.
In the prior art, before carrying out automatic welding, welding operative employee is required to carry out institute's welder's part artificial
It checks, when finding that workpiece gap is excessive, needs to carry out manual spot welding to it；Also, in automatic welding process, if
It encounters equipment fault or technological parameter is improper when may result in workpiece by burn-through, generally require welding operative employee and pass through naked eyes
The variation that concern welding gun and workpiece occur on height direction in time adjusts arc length balladeur train in time and is transported by emergency-stop device
Row closes automatic tracking function in time, time-consuming to take to prevent because workpiece gap is excessive or is burnt so as to cause welding gun tenesmus
Power, and height is required to welding operative employee, it is unfavorable for automatic industrial production work.
Summary of the invention
One of in order to solve the above problem, the present invention provides a kind of welding gun control method, the welding gun is controlled by balladeur train
Carry out tracking welding, which is characterized in that the control method comprising steps of
Control balladeur train adjusts welding gun to initial position；
Power supply is opened, the initial voltage V2 that the welding gun is located at produced electric arc when the initial position is collected and recorded；
Set fluctuation voltage V4；
Starting welding, acquires electric arc caused by the welding gun according to the real-time height tracing of the welding gun at work
Real-time voltage V0；
Calculate the pressure difference Vx of the real-time voltage V0 Yu initial voltage V2；
When judging that the pressure difference Vx is less than the fluctuation voltage V4, controls the welding gun and work on；
When judging that the pressure difference Vx is greater than or equal to the fluctuation voltage V4, controls the welding gun and stop working.
As a further improvement of the present invention, the voltage value of the real-time voltage V0 increases with the raising of the balladeur train.
As a further improvement of the present invention, the step " when judging that the pressure difference Vx is less than the fluctuation voltage V4, is controlled
The welding gun is made to work on " it specifically includes:
When judging that the real-time voltage V0 is less than initial voltage V2, controls the balladeur train and rise；
When judging that the real-time voltage V0 is greater than initial voltage V2, the balladeur train decline is controlled；
When judging that the real-time voltage V0 is equal to initial voltage V2, controls the balladeur train and keep present level.
As a further improvement of the present invention, the welding gun control method further comprises the steps of:
Setting tracking lower voltage limit V1 and tracking upper limit voltage V3, the initial voltage V2 are more than or equal under the tracking
Voltage limit V1 and be less than or equal to the tracking upper limit voltage V3.
As a further improvement of the present invention, the welding gun control method further comprises the steps of:
When judging that the real-time voltage V0 is greater than or equal to tracking upper limit voltage V3, the first alarm signal is issued；
When judging that the real-time voltage V0 is less than or equal to tracking lower voltage limit V1, the second alarm signal is issued.
As a further improvement of the present invention, the tracking upper limit voltage V3 is less than the initial voltage V2 and fluctuation electricity
Press the sum of V4.
The invention also provides a kind of welding control system, controlled using any welding gun control method in upper,
It is characterized in that, the welding control system includes:
Locating module adjusts the position of welding gun for controlling balladeur train；
Sampling module, for acquiring the initial voltage V2 of produced electric arc and institute when the welding gun is located at the initial position
State welding gun at work caused by electric arc real-time voltage V0；
Setting module, for setting fluctuation voltage V4；
Computing module, for calculating the pressure difference Vx of the real-time voltage V0 Yu initial voltage V2；
Comparison module for the size of the pressure difference Vx and fluctuation voltage V4, and comparison result is fed back to described
Locating module.
As a further improvement of the present invention, the setting module is also used to:
Setting tracking lower voltage limit V1 and tracking upper limit voltage V3, the initial voltage V2 are more than or equal under the tracking
Voltage limit V1 and be less than or equal to the tracking upper limit voltage V3.
As a further improvement of the present invention, the comparison module is also used to:
Compare the real-time voltage V0 and tracks the size of upper limit voltage V3；
Compare the real-time voltage V0 and tracks the size of lower voltage limit V1.
As a further improvement of the present invention, the welding control system further include:
Alarm module, when the comparison module judges that the real-time voltage V0 is greater than or equal to tracking upper limit voltage V3,
Issue the first alarm signal；When judging that the real-time voltage V0 is less than or equal to tracking lower voltage limit V1, the second alarm signal is issued
Number.
Compared with prior art, weld seam is welded using welding gun control method proposed by the present invention, can be substantially reduced
The degree intervened is thought caused by burning in welding process because of workpiece, alleviates the requirement to operator and labor intensity,
Automation of Welding degree is significantly improved, working efficiency is also improved, while also avoiding generating the danger of welding gun tenesmus, is guaranteed
Production smoothly, saves production cost, more economical and efficient.
Detailed description of the invention
Fig. 1 is the welding gun control method flow chart in one embodiment of the invention；
Fig. 2 is the timing diagram that welding gun controls in one embodiment of the invention；
Fig. 3 is the connection figure of the welding control system in one embodiment of the invention.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
The invention proposes a kind of welding gun control methods, and in the present invention, welding gun controls carry out tracking welding by balladeur train
It connects, specifically, balladeur train can drive welding gun to be moved in the vertical direction vertical with weld seam, is generally driven by stepper motor, led to
The length of control electric arc is crossed to realize welding.
Flow chart shown in referring to Fig.1, the welding gun control method specific steps proposed in one embodiment of the invention are as follows:
S1, welded before preparation, control balladeur train welding gun is adjusted to initial position；Specifically, the present embodiment
In initial position refer between welding gun and weld seam and most reasonably to play arc-height.
S2, power initiation welding is opened, welding gun generates electric arc at this time, collects and records down the initial voltage V2 of the electric arc.
S3, default fluctuation voltage V4, specifically, in the present embodiment, using programmable controller (PLC) as control
System, operator can pass through input unit (such as touch control panel) according to the specific weld seam operating condition of welded piece will be suitable
Fluctuation voltage V4 is inputted and is saved to PLC system.
S4, start welding, the arc length tracing function in opening control, according to the real-time height of welding gun at work
The real-time voltage V0 of electric arc caused by degree tracking acquisition welding gun.
Pressure difference Vx between S5, calculating real-time voltage V0 and initial voltage V2.
S6, the pressure difference Vx being calculated in real time is compared with fluctuation voltage V4:
When judging that pressure difference Vx is less than fluctuation voltage V4, control welding gun works on；
When judging that pressure difference Vx is greater than or equal to fluctuation voltage V4, control welding gun stops working.
In the present embodiment, the voltage value of real-time voltage V0 increases with the raising of balladeur train, therefore works as and judge that pressure difference Vx is big
When fluctuation voltage V4, illustrates that the height of welding gun at this time has been in dangerous position, be further continued for Butt welding gun and controlled
It is formed with the even defective work piece that may drop there is a situation where welding gun, so control when the present invention is by detecting this case
Welding gun stops working, and when pressure difference Vx being waited to be less than fluctuation voltage V4, then controls welding gun and works on, effectively prevents welding gun and go out
The case where now falling, high degree improve the stability and reliability of control system.
Since the voltage of electric arc is in initial voltage V2, the height of welding gun and current welded piece are the most suitable, therefore in order to
Welding gun height is maintained at initial position as far as possible, promotes the stability of welding gun control, when welding gun works on, referring to Fig. 2's
Timing diagram, control method of the invention further include:
When judging that real-time voltage V0 is less than initial voltage V2, control balladeur train rises；
When judging that real-time voltage V0 is greater than initial voltage V2, control balladeur train decline；
When judging that real-time voltage V0 is equal to initial voltage V2, control balladeur train keeps present level.
Meanwhile control method of the invention further include:
Setting tracking lower voltage limit V1 and tracking upper limit voltage V3, initial voltage V2 are greater than or equal to tracking lower voltage limit V1
And it is less than or equal to tracking upper limit voltage V3；
When judging that real-time voltage V0 is greater than or equal to tracking upper limit voltage V3, the first alarm signal is issued；
When judging that real-time voltage V0 is less than or equal to tracking lower voltage limit V1, the second alarm signal is issued.
For normal conditions, in welding, the real-time voltage V0 of the electric arc that welding gun generates at work with
Fluctuation is acceptable between track lower voltage limit V1 and tracking upper limit voltage V3, and the tracking upper limit voltage V3 in the present embodiment
Less than the sum of initial voltage V2 and fluctuation voltage V4；Although when real-time voltage V0 be higher than initial voltage V2 and fluctuation voltage V4 it
And when, stop the control of Butt welding gun, but just in order to further enhance the reliability in welding, when real-time voltage be higher than with
Track upper limit voltage V3, or when lower than tracking lower voltage limit V1, the first alarm signal and the second alarm signal are issued, to warn behaviour
Make personnel to pay close attention to the operating condition for issuing alarm, greatly reduces the risk that accident occurs in production.
Meanwhile the invention also provides a kind of welding control system, which uses control welding gun as described above
Control method is controlled, specifically, the control system in the present embodiment carries out whole control using programmable controller (PLC)
System, wherein welding control system includes:
Locating module, for controlling the position of balladeur train adjustment welding gun, specifically, using step drive device in the present embodiment
Drive carriage is mobile；
Sampling module exists for acquiring the initial voltage V2 of produced electric arc and welding gun when welding gun is located at initial position
The real-time voltage V0 of generated electric arc in work；
Setting module, for setting fluctuation voltage V4, tracking lower voltage limit V1 and tracking upper limit voltage V3；
Computing module, for calculating the pressure difference Vx of real-time voltage V0 Yu initial voltage V2；
Comparison module feeds back to the positioning for comparing the size of pressure difference Vx and fluctuation voltage V4, and by comparison result
Module is also used for comparing real-time voltage V0 and tracks the size and real-time voltage V0 and tracking lower voltage limit V1 of upper limit voltage V3
Size；
Alarm module issues first when comparison module judges that real-time voltage V0 is greater than or equal to tracking upper limit voltage V3
Alarm signal；When judging that real-time voltage V0 is less than or equal to tracking lower voltage limit V1, the second alarm signal is issued.
Weld seam is welded using welding gun control method proposed by the present invention, can be substantially reduced in welding process because of workpiece
The degree intervened is thought caused by burn-through, alleviates the requirement to operator and labor intensity, hence it is evident that improves welding certainly
Dynamicization degree also improves working efficiency, while also avoiding generating the danger of welding gun tenesmus, ensure that production smoothly, is saved
Production cost, more economical and efficient.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art
The other embodiments that member is understood that.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope that is bright, being not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention or change
More it should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of welding gun control method, the welding gun carries out tracking welding by balladeur train control, which is characterized in that the controlling party
Method includes:
Control balladeur train adjusts welding gun to initial position；
Power supply is opened, the initial voltage V2 that the welding gun is located at produced electric arc when the initial position is collected and recorded；
Set fluctuation voltage V4；
Starting welding, acquires the real-time of electric arc caused by the welding gun according to the real-time height tracing of the welding gun at work
Voltage V0；
Calculate the pressure difference Vx of the real-time voltage V0 Yu initial voltage V2；
When judging that the pressure difference Vx is less than the fluctuation voltage V4, controls the welding gun and work on；
When judging that the pressure difference Vx is greater than or equal to the fluctuation voltage V4, controls the welding gun and stop working.
2. welding gun control method according to claim 1, which is characterized in that the voltage value of the real-time voltage V0 is with described
The raising of balladeur train and increase.
3. welding gun control method according to claim 2, which is characterized in that the step " judges that the pressure difference Vx is less than
When the fluctuation voltage V4, control the welding gun and work on " it specifically includes:
When judging that the real-time voltage V0 is less than initial voltage V2, controls the balladeur train and rise；
When judging that the real-time voltage V0 is greater than initial voltage V2, the balladeur train decline is controlled；
When judging that the real-time voltage V0 is equal to initial voltage V2, controls the balladeur train and keep present level.
4. welding gun control method according to claim 1, which is characterized in that the welding gun control method further comprises the steps of:
Setting tracking lower voltage limit V1 and tracking upper limit voltage V3, the initial voltage V2, which is greater than or equal under the tracking, to ration the power supply
It presses V1 and is less than or equal to the tracking upper limit voltage V3.
5. welding gun control method according to claim 4, which is characterized in that the welding gun control method further comprises the steps of:
When judging that the real-time voltage V0 is greater than or equal to tracking upper limit voltage V3, the first alarm signal is issued；
When judging that the real-time voltage V0 is less than or equal to tracking lower voltage limit V1, the second alarm signal is issued.
6. welding gun control method according to claim 4, which is characterized in that the tracking upper limit voltage V3 is less than described first
The sum of beginning voltage V2 and fluctuation voltage V4.
7. a kind of welding control system is controlled, feature using the welding gun control method as described in any in claim 1 to 6
It is, the welding control system includes:
Locating module adjusts the position of welding gun for controlling balladeur train；
Sampling module, for acquiring the initial voltage V2 of produced electric arc and the weldering when welding gun is located at the initial position
Rifle at work caused by electric arc real-time voltage V0；
Setting module, for setting fluctuation voltage V4；
Computing module, for calculating the pressure difference Vx of the real-time voltage V0 Yu initial voltage V2；
Comparison module feeds back to the positioning for the size of the pressure difference Vx and fluctuation voltage V4, and by comparison result
Module.
8. welding control system according to claim 7, which is characterized in that the setting module is also used to:
Setting tracking lower voltage limit V1 and tracking upper limit voltage V3, the initial voltage V2, which is greater than or equal under the tracking, to ration the power supply
It presses V1 and is less than or equal to the tracking upper limit voltage V3.
9. welding control system according to claim 8, which is characterized in that the comparison module is also used to:
Compare the real-time voltage V0 and tracks the size of upper limit voltage V3；
Compare the real-time voltage V0 and tracks the size of lower voltage limit V1.
10. welding control system according to claim 9, which is characterized in that the control system further include:
Alarm module is issued when the comparison module judges that the real-time voltage V0 is greater than or equal to tracking upper limit voltage V3
First alarm signal；When judging that the real-time voltage V0 is less than or equal to tracking lower voltage limit V1, the second alarm signal is issued.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910208099.7A CN109877421A (en) | 2019-03-19 | 2019-03-19 | Welding gun control method and its control system |
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