CN107570840B - Beam controlling system suitable for alternating-current argon arc welder - Google Patents
Beam controlling system suitable for alternating-current argon arc welder Download PDFInfo
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- CN107570840B CN107570840B CN201710929674.3A CN201710929674A CN107570840B CN 107570840 B CN107570840 B CN 107570840B CN 201710929674 A CN201710929674 A CN 201710929674A CN 107570840 B CN107570840 B CN 107570840B
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Abstract
The present invention relates to a kind of beam controlling systems suitable for alternating-current argon arc welder, including wave control terminal interconnected and alternating-current argon arc welder, normal weld electric current is provided by the wave control terminal to drive the alternating-current argon arc welder, and the wave control terminal provides the transition current during dipole inversion also for the alternating-current argon arc welder, three road pwm signals are generated using wave 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, there is connection between the fiducial value of each comparator, but depending on according to actual needs, guarantee that output polarity conversion time is located at the middle position of " transition current ", using this kind of beam controlling system, transition current ensure that electric arc can in welding process Stablize and noise is smaller.
Description
Technical field
The present invention relates to the control fields, in particular to one kind of control field more particularly to alternating-current argon arc welder to be suitable for
The beam controlling system of alternating-current argon arc welder.
Background technique
Ac argon arc weld is steady due to its outstanding advantage and its electric arc on the nonferrous materials such as welding aluminium, magnesium, copper
Calmly, the features such as quality of weld seam molding is high, quotes it extensively in civilian, industrial especially military industry field.But ac argon arc weld
It is alternating current, when polarity changes, there are zero passage phenomenons for electric current, so welding low current (energy is small, and thermal inertia is small)
Easily occur current interruption phenomenon when connecing, but when welding light sheet material, and small standard parameter must be used, and is welded using high current
Being quickly converted due to current polarity when connecing causes reactor and welding arc to generate very big noise, keeps construction environment tight
Deteriorate again.
Summary of the invention
Its purpose of the invention is that low current stability can be improved by providing one kind, and source of welding current work can also be made to exist
Smaller current standard, while noise problem when can also reduce AC great current welding is suitable for alternating-current argon arc welder
Beam controlling system.
To achieve the goals above, the beam controlling system suitable for alternating-current argon arc welder of the invention has following constitute:
This be suitable for alternating-current argon arc welder beam controlling system, be mainly characterized by, including wave control terminal interconnected and
Alternating-current argon arc welder provides normal weld electric current by the wave control terminal to drive the alternating-current argon arc welder, and the wave
Pilot arc stablizes required transition current during control terminal also provides dipole inversion for the alternating-current argon arc welder.
Preferably, the wave control terminal realizes the confession of transition current during dipole inversion by setting interrupt mechanism
It gives.
More preferably, wave control terminal exports three kinds of PWM waves by comparator, wherein the second PWM wave is used to be the exchange argon arc
Welding machine provides the cleaning sector width and a-c cycle of output, and provides time reference for the first PWM wave and third PWM wave；It is described
The first PWM wave and third PWM wave 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 the wave control terminal realizes the output of three kinds of PWM waves, and three ratios by three comparators
It is respectively the first comparator for exporting the first PWM wave, and the second comparator and output third of the second PWM wave of output compared with device
The third comparator of PWM wave, and the fiducial value of three comparators is interrelated.
It is still further preferred that the fiducial value of three comparators and the alternating-current argon arc welder carry out the time of dipole inversion
It is related.
Capitally, the fiducial value of the fiducial value of the first comparator and third comparator is about the second comparator
Fiducial value is symmetrical.
It is particularly preferred that the beam controlling system detects the rising edge and failing edge of the first PWM wave by the counter of peripheral hardware, with
And the rising edge and failing edge of third PWM wave realize the triggering of interrupt mechanism.
It is still further preferred that the interrupt mechanism that the counter triggers includes the first interrupt mechanism and the second interrupt mechanism, wherein
First interrupt mechanism is triggered by the rising edge of the first PWM wave or the failing edge of third PWM wave, and the second interrupt mechanism is by first
The failing edge of PWM wave or the rising edge of third PWM wave are triggered.
Capitally, the first interrupt mechanism be used to control wave control terminal to the alternating-current argon arc welder export transition current into
Row driving, the second interrupt mechanism are used to control wave control terminal and are driven to the alternating-current argon arc welder output normal weld electric current
It is dynamic.
Preferably, the degree of stability phase of the size of the transition current and the electric arc maintained required for the beam controlling system
It closes.
Using the beam controlling system suitable for alternating-current argon arc welder in the invention, dipole inversion occurs using secondary inverting
When, apply one fixed " transition current " in electric current setting, electric current when guaranteeing 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 also avoiding caused by high current polarity changes
Noise problem.
Detailed description of the invention
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.
Specific embodiment
It is further to carry out combined with specific embodiments below in order to more clearly describe technology contents of the invention
Description.
Beam controlling system suitable for alternating-current argon arc welder of the invention has following constitute:
This be suitable for alternating-current argon arc welder beam controlling system, be mainly characterized by, including wave control terminal interconnected and
Alternating-current argon arc welder provides normal weld electric current by the wave control terminal to drive the alternating-current argon arc welder, and the wave
Pilot arc stablizes required transition current during control terminal also provides dipole inversion for the alternating-current argon arc welder.
In a kind of preferable embodiment, the wave control terminal realizes dipole inversion process by setting interrupt mechanism
The supply of middle transition current.
In a kind of more preferably embodiment, wave control terminal exports three kinds of PWM waves by comparator, wherein the second PWM wave
It is mentioned for providing the cleaning sector width and a-c cycle of output for the alternating-current argon arc welder, and for the first PWM wave and third PWM wave
For time reference；First PWM wave and third PWM wave is 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, the wave control terminal realizes the defeated of three kinds of PWM waves by three comparators
Out, and three comparators are respectively the first comparator for exporting the first PWM wave, and export the second of the second PWM wave
The third comparator of comparator and output third PWM wave, and the fiducial value of three comparators is interrelated.
In a kind of favourable embodiment, the fiducial value of three comparators and the alternating-current argon arc welder into
The time correlation of row dipole inversion.
In a kind of splendid embodiment, the fiducial value of the first comparator and the fiducial value of third comparator are equal
Fiducial value about the second comparator is symmetrical.
In a kind of preferred embodiment, the beam controlling system detects the first PWM wave by the counter of peripheral hardware
Rising edge and failing edge and the rising edge and failing edge of third PWM wave realize the triggering of interrupt mechanism.
In a kind of favourable embodiment, the interrupt mechanism of the 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 wave or the failing edge of third PWM wave, second
Interrupt mechanism is triggered by the failing edge of the first PWM wave or the rising edge of third PWM wave.
In a kind of splendid embodiment, the first interrupt mechanism is for controlling wave control terminal to the ac argon arc weld
Machine output transition current is driven, and the second interrupt mechanism is used to control wave control terminal and exports just to the alternating-current argon arc welder
Normal welding current is driven.
In a kind of preferable embodiment, the electricity of maintenance required for the size of the transition current and the beam controlling system
The degree of stability of arc is related.
When the principle of the present invention mainly utilizes secondary inverting that dipole inversion occurs, application one is fixed in electric current setting
" transition current ", guarantee 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 also avoiding high current polarity and changing caused noise problem.
Referring to Fig. 1, rising edge and failing edge, third PWM wave using wave control terminal peripheral hardware counter to the first PWM wave
Rising edge and failing edge detected, and then cut interrupt mechanism.It in this way can be respectively in the first PWM wave rising edge and third
" exporting transition current to alternating-current argon arc welder " setting is realized in PWM wave failing edge interrupt function, and in the first PWM wave failing edge
Setting with " exporting normal weld electric current to alternating-current argon arc welder " is realized in third PWM wave rising edge interrupt function, guarantees to hand over
Setting electric current is " transition current " in the front and back D gate time that stream polarity changes.In the case of low current, in dipole inversion
Electric current is set as being not easy current interruption occur when " transition current " welding, and arc stiffness also can be special to raising；In the case of high current,
Electric current is set as " transition current " when dipole inversion, and electric current is greatly lowered when due to conversion, so as to reduce dipole inversion
Bring noise, while welding performance will not be influenced.
Principle such as Fig. 2 and Fig. 3 in software realization, principal function mainly realize the initialization of the MCU of some wave control terminals, than
Such as system clock, I/O port, AD conversion, DA conversion and counter (timer).It further include mainly that timer is related to timer
The configuration of interruption, such as the interrupt mechanism that the first PWM wave and third PWM wave generate are configured and are enabled, and there are also be exactly to enter extremely to follow
Ring, wherein main realize welding timing control program, the real time scan of input signal and the dynamic scan of some displays etc..
Mainly realize the synchronism output of DA conversion signal and secondary inverting driving PWM1 in interrupt function part.Occur interrupting letter
Number when, first determine whether the first PWM wave generate or third PWM wave generate, next judge again be rising edge generate
Or failing edge generate, corresponding processing is done by above judgement again as shown in Figures 2 and 3, to realize such as Fig. 1 high current
And the electric current in the case of low current sets output waveform.
Using the beam controlling system suitable for alternating-current argon arc welder of the invention, by software realization, do not need to increase cost,
With preferable consistency, and it can realize ac argon arc weld low current arc stability, stiffness is good, 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 can still make
Various modifications and alterations are without departing from the spirit and scope of the invention.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive.
Claims (8)
1. a kind of beam controlling system suitable for alternating-current argon arc welder, which is characterized in that including wave control terminal interconnected and friendship
Argon arc welding machine is flowed, provides normal weld electric current by the wave control terminal to drive the alternating-current argon arc welder, and the wave control
Pilot arc stablizes required transition current during terminal also provides dipole inversion for the alternating-current argon arc welder；
The wave control terminal realizes the supply of transition current during dipole inversion by setting interrupt mechanism；
The wave control terminal exports three kinds of PWM waves by comparator, wherein the second PWM wave is used to mention for the alternating-current argon arc welder
Time reference is provided for the cleaning sector width and a-c cycle of output, and for the first PWM wave and third PWM wave；Described first
PWM wave and third PWM wave are used to the incision control of interrupt mechanism, during realizing the alternating-current argon arc welder dipole inversion
The supply of transition current.
2. the beam controlling system according to claim 1 suitable for alternating-current argon arc welder, which is characterized in that the wave control is whole
The output of three kinds of PWM waves is realized at end by three comparators, and three comparators are respectively export the first PWM wave the
One comparator, and the second comparator and the third comparator of output third PWM wave of the second PWM wave of output, and three comparisons
The fiducial value of device is interrelated.
3. the beam controlling system according to claim 2 suitable for alternating-current argon arc welder, which is characterized in that three ratios
Compared with the time correlation that the fiducial value of device and the alternating-current argon arc welder carry out dipole inversion.
4. the beam controlling system according to claim 3 suitable for alternating-current argon arc welder, which is characterized in that first ratio
Fiducial value compared with the fiducial value of the fiducial value of device and third comparator about the second comparator is symmetrical.
5. the beam controlling system according to claim 1 suitable for alternating-current argon arc welder, which is characterized in that the wave control system
System detects the rising edge of the first PWM wave and the rising edge and failing edge of failing edge and third PWM wave by the counter of peripheral hardware
Realize the triggering of interrupt mechanism.
6. the beam controlling system according to claim 5 suitable for alternating-current argon arc welder, which is characterized in that the 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 wave
Rise along or the failing edge of third PWM wave triggered, the second interrupt mechanism by the first PWM wave failing edge or third PWM wave it is upper
Edge is risen to be triggered.
7. the beam controlling system according to claim 6 suitable for alternating-current argon arc welder, which is characterized in that the first interrupt mechanism
It is driven for controlling wave control terminal to the alternating-current argon arc welder output transition current, the second interrupt mechanism is for controlling
Wave control terminal is driven to the alternating-current argon arc welder output normal weld electric current.
8. the beam controlling system according to claim 1 suitable for alternating-current argon arc welder, which is characterized in that the transition electricity
The size of stream is related to the degree of stability of electric arc maintained required for the beam controlling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710929674.3A CN107570840B (en) | 2017-10-09 | 2017-10-09 | Beam controlling system suitable for alternating-current argon arc welder |
Applications Claiming Priority (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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| CN107570840A CN107570840A (en) | 2018-01-12 |
| CN107570840B true CN107570840B (en) | 2019-06-14 |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100398245C (en) * | 2005-05-30 | 2008-07-02 | 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 |
| CN101352776B (en) * | 2008-09-18 | 2011-08-31 | 清华大学 | Variable polarity welding power supply secondary inverter circuit and control method thereof |
| CN101428368A (en) * | 2008-12-12 | 2009-05-13 | 北京工业大学 | Control method for short-circuiting transfer soldering system |
| CN202079341U (en) * | 2011-04-07 | 2011-12-21 | 上海威特力焊接设备制造股份有限公司 | Arc-stabilizing device of alternate-current argon arc welder |
| CN102179597B (en) * | 2011-04-07 | 2013-11-06 | 上海威特力焊接设备制造股份有限公司 | Arc stabilizer of AC argon arc welding machine |
| CN103618469B (en) * | 2013-11-29 | 2015-10-28 | 上海沪工焊接集团股份有限公司 | Inversion AC wave shape control method and control circuit |
| CN206382679U (en) * | 2017-01-13 | 2017-08-08 | 深圳市川瑞贝科技有限公司 | A kind of alternating current-direct current argon arc welding low current arc static circuit |
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