CN107570840A - Suitable for the beam controlling system of alternating-current argon arc welder - Google Patents
Suitable for the beam controlling system of alternating-current argon arc welder Download PDFInfo
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- CN107570840A CN107570840A CN201710929674.3A CN201710929674A CN107570840A CN 107570840 A CN107570840 A CN 107570840A CN 201710929674 A CN201710929674 A CN 201710929674A CN 107570840 A CN107570840 A CN 107570840A
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- argon arc
- arc welder
- pwm ripples
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Abstract
The present invention relates to a kind of beam controlling system suitable for alternating-current argon arc welder,Ripple control terminal and alternating-current argon arc welder including interconnection,Normal weld electric current is provided by described ripple control terminal to drive the alternating-current argon arc welder,And described ripple control terminal also provides the transition current during dipole inversion for described alternating-current argon arc welder,Three road pwm signals are produced using ripple control terminal and comparator,It is respectively used to provide cleaning width and a-c cycle to alternating-current argon arc welder,And for cutting interrupt mechanism,Transition current during dipole inversion is provided to alternating-current argon arc welder,Contact between the fiducial value of each comparator be present,But depending on stilling need according to the actual requirements,Ensure that output polarity conversion time is located at the centre position of " transition current ",Using this kind of beam controlling system,Transition current ensure that electric arc can be stablized in welding process and noise is smaller.
Description
Technical field
The present invention relates to control field, more particularly to the control field of alternating-current argon arc welder, in particular to one kind to be applied to
The beam controlling system of alternating-current argon arc welder.
Background technology
Ac argon arc weld is steady due to its outstanding advantage on the nonferrous materials such as welding aluminium, magnesium, copper, and its electric arc
Calmly, the features such as quality of weld seam molding is high, makes it be quoted extensively in civilian, industrial especially military industry field.But ac argon arc weld
It is alternating current, when polarity changes, electric current has zero passage phenomenon, so being welded in low current (energy is small, and thermal inertia is small)
Easily occur current interruption phenomenon when connecing, but when welding light sheet material, small standard parameter must be used again, and welded using high current
Due to the rapid translating of current polarity when connecing, cause reactor and welding arc to produce very big noise, make construction environment tight
Deteriorate again.
The content of the invention
Its purpose of the invention is that low current stability can be improved by providing one kind, can also be operated in the source of welding current
Smaller current standard, while noise problem when can also reduce AC great current welding is applied to alternating-current argon arc welder
Beam controlling system.
To achieve these goals, the beam controlling system suitable for alternating-current argon arc welder of the invention has following form：
This be applied to alternating-current argon arc welder beam controlling system, it is mainly characterized by, including the ripple control terminal of interconnection and
Alternating-current argon arc welder, normal weld electric current is provided by described ripple control terminal to drive the alternating-current argon arc welder, and described ripple
Pilot arc stablizes required transition current during control terminal also provides dipole inversion for described alternating-current argon arc welder.
It is preferred that described ripple control terminal is by setting interrupt mechanism to realize the confession of transition current during dipole inversion
Give.
More preferably, ripple control terminal exports three kinds of PWM ripples by comparator, wherein it is the exchange argon arc that the 2nd PWM ripples, which are used for,
Welding machine provides the cleaning sector width and a-c cycle of output, and provides time reference for the first PWM ripples and the 3rd PWM ripples；It is described
The first PWM ripples and the 3rd PWM ripples be used to interrupt mechanism incision control, to realize the alternating-current argon arc welder dipole inversion mistake
The supply of transition current in journey.
It is particularly preferred that described ripple control terminal realizes the output of three kinds of PWM ripples, and described three ratios by three comparators
It is respectively the first comparator for exporting the first PWM ripples compared with device, and exports the second comparator and the output the 3rd of the 2nd PWM ripples
3rd comparator of PWM ripples, and the fiducial value of three comparators is interrelated.
It is still further preferred that the fiducial value of three described comparators carries out the time of dipole inversion with described alternating-current argon arc welder
It is related.
Capitally, the fiducial value of the fiducial value of described first comparator and the 3rd comparator is on the second comparator
Fiducial value is symmetrical.
It is particularly preferred that described beam controlling system detects the rising edge and trailing edge of the first PWM ripples by the counter of peripheral hardware, with
And the 3rd PWM ripples rising edge and trailing edge realize the triggering of interrupt mechanism.
It is still further preferred that the interrupt mechanism of described counter triggering includes the first interrupt mechanism and the second interrupt mechanism, wherein
First interrupt mechanism is triggered by the rising edge of the first PWM ripples or the trailing edge of the 3rd PWM ripples, and the second interrupt mechanism is by first
The rising edge of the trailing edge of PWM ripples or the 3rd PWM ripples is triggered.
Capitally, the first interrupt mechanism enters for controls ripple control terminal to described alternating-current argon arc welder output transition current
Row driving, the second interrupt mechanism are used for controls ripple control terminal and driven to described alternating-current argon arc welder output normal weld electric current
It is dynamic.
It is preferred that the size of described transition current and the degree of stability phase of the electric arc maintained required for the beam controlling system
Close.
Using the beam controlling system suitable for alternating-current argon arc welder in the invention, dipole inversion occurs using secondary inverting
When, apply " transition current " fixed in current settings, electric current when ensureing dipole inversion will not be too small, avoids low current
When due to energy inertia it is small caused by electric arc is unstable or even current interruption, while it also avoid caused by high current polarity changes
Noise problem.
Brief description of the drawings
Fig. 1 is the timing diagram suitable for the specific embodiment of the beam controlling system of alternating-current argon arc welder in the present invention.
Fig. 2 is the primary control program figure of the beam controlling system suitable for alternating-current argon arc welder in the present invention.
Fig. 3 is the interrupt routine figure of the beam controlling system suitable for alternating-current argon arc welder in the present invention.
Embodiment
In order to more clearly describe the technology contents of the present invention, carried out with reference to specific embodiment further
Description.
The beam controlling system suitable for alternating-current argon arc welder of the present invention has following form：
This be applied to alternating-current argon arc welder beam controlling system, it is mainly characterized by, including the ripple control terminal of interconnection and
Alternating-current argon arc welder, normal weld electric current is provided by described ripple control terminal to drive the alternating-current argon arc welder, and described ripple
Pilot arc stablizes required transition current during control terminal also provides dipole inversion for described alternating-current argon arc welder.
In a kind of preferably embodiment, described ripple control terminal is by setting interrupt mechanism to realize dipole inversion process
The supply of middle transition current.
In a kind of more preferably embodiment, ripple control terminal exports three kinds of PWM ripples by comparator, wherein the 2nd PWM ripples
Carried for providing the cleaning sector width and a-c cycle of output for the alternating-current argon arc welder, and for the first PWM ripples and the 3rd PWM ripples
For time reference；The first described PWM ripples and the 3rd PWM ripples are used to the incision control of interrupt mechanism, to realize the exchange argon
The supply of transition current during arc-welding machine dipole inversion.
In a kind of preferred embodiment, described ripple control terminal realizes the defeated of three kinds of PWM ripples by three comparators
Go out, and described three comparators are respectively the first comparator for exporting the first PWM ripples, and export the second of the 2nd PWM ripples
3rd comparator of the 3rd PWM ripples of comparator and output, and the fiducial value of three comparators is interrelated.
In a kind of favourable embodiment, fiducial value and the described alternating-current argon arc welder of described three comparators enter
The time correlation of row dipole inversion.
In a kind of splendid embodiment, the fiducial value of the fiducial value of described first comparator and the 3rd comparator is equal
Fiducial value on the second comparator is symmetrical.
In a kind of preferred embodiment, described beam controlling system detects the first PWM ripples by the counter of peripheral hardware
Rising edge and trailing edge, and the rising edge of the 3rd PWM ripples and trailing edge realize the triggering of interrupt mechanism.
In a kind of favourable embodiment, the interrupt mechanism of described counter triggering includes the first interrupt mechanism and the
Two interrupt mechanisms, wherein the first interrupt mechanism is triggered by the rising edge of the first PWM ripples or the trailing edge of the 3rd PWM ripples, second
Interrupt mechanism is triggered by the trailing edge of the first PWM ripples or the rising edge of the 3rd PWM ripples.
In a kind of splendid embodiment, the first interrupt mechanism is used for controls ripple control terminal to described ac argon arc weld
Machine output transition current is driven, and the second interrupt mechanism is used for controls ripple control terminal and exported just to described alternating-current argon arc welder
Normal welding current is driven.
In a kind of preferably embodiment, the size of described transition current and the electricity maintained required for the beam controlling system
The degree of stability of arc is related.
When mainly using secondary inverting dipole inversion occurs for principle of the invention, apply a fixation in current settings
" transition current ", ensure dipole inversion when electric current size, when avoiding electric current too small due to energy inertia it is small caused by electric arc
Unstable or even current interruption, while it also avoid high current polarity and change caused noise problem.
Referring to Fig. 1, using ripple control terminal peripheral hardware counter to rising edge and trailing edge, the 3rd PWM ripples of the first PWM ripples
Rising edge and trailing edge detected, and then cut interrupt mechanism.So can be respectively in the first PWM ripples rising edge and the 3rd
" exporting transition current to alternating-current argon arc welder " setting is realized in PWM ripple trailing edge interrupt functions, and in the first PWM ripple trailing edges
Setting with " exporting normal weld electric current to alternating-current argon arc welder " is realized in the 3rd PWM ripple rising edge interrupt functions, ensures to hand over
Setting electric current is " transition current " in the front and rear D gate times that stream polarity changes.In the case of low current, in dipole inversion
Current settings are that " transition current " is not easy current interruption occur when welding, and arc stiffness also can be special to raising；In the case of high current,
Current settings are " transition current " during dipole inversion, because electric current is greatly lowered when changing, so as to reduce dipole inversion
The noise brought, while do not interfere with welding performance yet.
Principle such as Fig. 2 and Fig. 3 that software is realized, principal function mainly realize the MCU of some ripple control terminals initialization, than
Such as system clock, I/O port, AD conversion, DA conversions and counter (timer).It is related to timer mainly also to include timer
The configuration of interruption, such as the first PWM involve interrupt mechanism configuration caused by the 3rd PWM ripples and enabled, and are also exactly to enter extremely to follow
Ring, wherein main realize welding timing control program, the real time scan of input signal and some dynamic scans shown etc..
Mainly realize DA conversion signals and secondary inverting driving PWM1 synchronism output in interrupt function part.Occur interrupting letter
Number when, first determine whether caused by the first PWM ripples or caused by the 3rd PWM ripples next judge to be produced in rising edge again
Or trailing edge produce, by more than judgement do corresponding processing again as shown in Figures 2 and 3, to realize such as Fig. 1 high currents
And the current settings output waveform in the case of low current.
Using the beam controlling system suitable for alternating-current argon arc welder of the present invention, realized by software, it is not necessary to increase cost,
With preferable uniformity, and ac argon arc weld low current arc stability can be realized, deflection is good, in the case of using high current
Noise also greatly reduces.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that it can still make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, specification and drawings are considered as illustrative
It is and nonrestrictive.
Claims (10)
1. a kind of beam controlling system suitable for alternating-current argon arc welder, it is characterised in that including the ripple control terminal of interconnection and friendship
Argon arc welding machine is flowed, provides normal weld electric current by described ripple control terminal to drive the alternating-current argon arc welder, and described ripple control
Pilot arc stablizes required transition current during terminal also provides dipole inversion for described alternating-current argon arc welder.
2. the beam controlling system according to claim 1 suitable for alternating-current argon arc welder, it is characterised in that described ripple control is whole
End is by setting interrupt mechanism to realize the supply of transition current during dipole inversion.
3. the beam controlling system according to claim 2 suitable for alternating-current argon arc welder, it is characterised in that ripple control terminal passes through
Comparator exports three kinds of PWM ripples, wherein the 2nd PWM ripples are used for cleaning sector width and the friendship that output is provided for the alternating-current argon arc welder
Frequency is flowed, and time reference is provided for the first PWM ripples and the 3rd PWM ripples；The first described PWM ripples and the 3rd PWM ripples are used to
The incision control of interrupt mechanism, to realize the supply of the transition current during the alternating-current argon arc welder dipole inversion.
4. the beam controlling system according to claim 3 suitable for alternating-current argon arc welder, it is characterised in that described ripple control is whole
The output of three kinds of PWM ripples is realized at end by three comparators, and described three comparators are respectively the of the first PWM ripples of output
One comparator, and the 3rd comparator of the 3rd PWM ripples of the second comparator of the 2nd PWM ripples of output and output, and three comparisons
The fiducial value of device is interrelated.
5. the beam controlling system according to claim 4 suitable for alternating-current argon arc welder, it is characterised in that three described ratios
Compared with the time correlation of the fiducial value and described alternating-current argon arc welder progress dipole inversion of device.
6. the beam controlling system according to claim 5 suitable for alternating-current argon arc welder, it is characterised in that the first described ratio
It is symmetrical compared with the fiducial value of the fiducial value of device and the fiducial value of the 3rd comparator on the second comparator.
7. the beam controlling system according to claim 3 suitable for alternating-current argon arc welder, it is characterised in that described ripple control system
System detects the rising edge and trailing edge of the first PWM ripples, and the rising edge and trailing edge of the 3rd PWM ripples by the counter of peripheral hardware
Realize the triggering of interrupt mechanism.
8. the beam controlling system according to claim 7 suitable for alternating-current argon arc welder, it is characterised in that described counter
The interrupt mechanism of triggering includes the first interrupt mechanism and the second interrupt mechanism, wherein the first interrupt mechanism is by the upper of the first PWM ripples
Rise along or the trailing edges of the 3rd PWM ripples triggered, the second interrupt mechanism by the first PWM ripples trailing edge or the 3rd PWM ripples it is upper
Edge is risen to be triggered.
9. the beam controlling system according to claim 8 suitable for alternating-current argon arc welder, it is characterised in that the first interrupt mechanism
It is driven for controls ripple control terminal to described alternating-current argon arc welder output transition current, the second interrupt mechanism is used to control
Ripple control terminal is driven to described alternating-current argon arc welder output normal weld electric current.
10. the beam controlling system according to claim 1 suitable for alternating-current argon arc welder, it is characterised in that described transition
The degree of stability of electric arc of the size of electric current to being maintained required for the beam controlling system is related.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929674.3A CN107570840B (en) | 2017-10-09 | 2017-10-09 | Beam controlling system suitable for alternating-current argon arc welder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929674.3A CN107570840B (en) | 2017-10-09 | 2017-10-09 | Beam controlling system suitable for alternating-current argon arc welder |
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| Publication Number | Publication Date |
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| CN107570840A true CN107570840A (en) | 2018-01-12 |
| CN107570840B CN107570840B (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710929674.3A Active CN107570840B (en) | 2017-10-09 | 2017-10-09 | Beam controlling system suitable for alternating-current argon arc welder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422069A (en) * | 2018-03-05 | 2018-08-21 | 唐山松下产业机器有限公司 | Reduce the method and system of welding machine arc noise |
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| CN1695867A (en) * | 2005-05-30 | 2005-11-16 | 陈仁富 | Two times inversion main loop of argon welder with variable polarity |
| CN200957489Y (en) * | 2006-09-11 | 2007-10-10 | 江苏科技大学 | AC square-wave arc stabilizer |
| CN101352776A (en) * | 2008-09-18 | 2009-01-28 | 清华大学 | Variable polarity welding power supply secondary inverter circuit and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108422069A (en) * | 2018-03-05 | 2018-08-21 | 唐山松下产业机器有限公司 | Reduce the method and system of welding machine arc noise |
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| CN107570840B (en) | 2019-06-14 |
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