CN110340488A - A kind of promotion arc start control method of inverter type welder - Google Patents
A kind of promotion arc start control method of inverter type welder Download PDFInfo
- Publication number
- CN110340488A CN110340488A CN201910473782.3A CN201910473782A CN110340488A CN 110340488 A CN110340488 A CN 110340488A CN 201910473782 A CN201910473782 A CN 201910473782A CN 110340488 A CN110340488 A CN 110340488A
- Authority
- CN
- China
- Prior art keywords
- current
- welding gun
- input current
- output
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
-
- 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
- B23K9/073—Stabilising the arc
-
- 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
- B23K9/073—Stabilising the arc
- B23K9/0732—Stabilising of the arc current
-
- 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
Abstract
The present invention relates to inverter type welder control technology fields, disclose a kind of promotion arc start control method of inverter type welder, including S1: output narrow spaces X1 waits acquisition input current Iin periodically, judges whether welding gun contacts with workpiece according to the numerical value of input current Iin；S2: after detecting that welding gun and workpiece come into full contact with, exporting pick-up current Ist waits welding gun to be promoted, set pulse-width regulated datum quantity W1, output pulse width regulated quantity is X2, when welding gun is promoted to setting height H1, it calculates output pulse width regulated quantity X2 and is greater than setting pulse-width regulated datum quantity W1, then welding gun has been promoted；S3: when detecting that welding gun leaves workpiece, output pick-up current Ist is gradient to output welding current Iout within the Ts time, into the normal weld stage；According to the variation for the pulse width modulation amount for realizing the stable inverter of input current, judge that welded condition is accurate and improves stability without detecting the voltage and current signals of source of welding current output end without additional detections hardware.
Description
Technical field
The present invention relates to inverter type welder control technology fields, more specifically, it relates to which a kind of promotion of inverter type welder is drawn
Arc control method.
Background technique
Existing electric welding machine is mostly using the constant-current supply for including inverter, in the working principle of electric welding machine, electric welding
It needs constantly to change distance between the welding gun and welded workpiece of machine, while to promote striking effect also to avoid the tungsten on welding gun
Burn current interruption between workpiece or welding gun and welded workpiece in pole.
Currently, the striking effect of welding machine usually manually holds the transient state point controlled when welding gun is contacted with workpiece first
Peak current cannot make tungsten electrode and workpiece bonding on welding gun, then manually adjust output electric current, control defeated when welding gun is promoted
Electric current out, cannot because electric current is too small and current interruption, workpiece can not be burnt because electric current is too big.
But manually adjust output electric current after, cannot accurately judge entire welding process, can not to each stage into
Row effectively control, the effect for promoting striking is poor.
Summary of the invention
For the effect difference technical problem of the existing promotion striking method for manually adjusting output electric current, the present invention provides one kind
The promotion arc start control method of inverter type welder, having can accurately judge that entire welding process control effectively to each stage
The advantages of.
To achieve the above object, the present invention provides the following technical scheme that
A kind of promotion arc start control method of inverter type welder, includes the following steps:
Step S1: output narrow spaces X1, wait acquisition input current I periodicallyin, according to input current IinNumerical value judge to weld
The contact condition of rifle and workpiece；
Step S2: after detecting that welding gun and workpiece come into full contact with, pick-up current I is exportedstIt waits welding gun to be promoted, sets pulsewidth
Adjust datum quantity W1, output pulse width regulated quantity is X2, when welding gun is promoted to setting height H1, calculate output pulse width
Regulated quantity X2Greater than setting pulse-width regulated datum quantity W1Then it is judged as that welding gun has been promoted；
Step S3: when detecting that welding gun leaves workpiece, pick-up current I is exportedstIn TsOutput welding current is gradient in time
Iout, into the normal weld stage.
Through the above technical solutions, setting the cycle time of acquisition data, the input for detecting inverter periodically is waited
Electric current judges the contact condition of welding gun and workpiece according to input current, according to the defeated of the stable inverter of realization input current
The variation of pulse width out judges that contact condition is accurate and is not necessarily to additional detections hardware, without detecting source of welding current output end
Voltage and current signals, reduce welding machine cost, improve welding machine job stability.
Further, in the step S1, as input current IinIn continuous set period of time T1Inside all it is higher than threshold electric current
I1, then it is judged as that welding gun comes into full contact with workpiece.
Further, step S4: in the normal weld stage, as input current IinContinuous time TminIt is interior to be lower than minimum value Imin
When, then it is current interruption.
Further, in current interruption deterministic process, input current I is detected as long as having 1 timeinHigher than threshold electric current I1Then weigh
It is new to start timing Tmin, into the normal weld stage.
Further, the input current I in continuous N number of period is acquiredinAnd average value is calculated as final Iin, wherein N
For input current sampling filter coefficient.
Through the above technical solutions, the input current to sampling is filtered, the input current output of acquisition is improved
Accuracy, improve to the interference free performance of extraneous unfavorable factor.
Further, the input current sampling filter coefficient in step S1 into step S4 is not all the same, and welding machine is in non-
Input current sampling filter coefficient N when normal weld state is less than input current sampling when welding machine is in normal weld state
Filter factor N.
Through the above technical solutions, input when input current when improper welded condition changes than normal weld state
Curent change is big, therefore the small input current variable quantity for being avoided that elimination and needing of filter factor.
Further, further include step S0 before step S1: before the starting the arc, the duty ratio of control pulse-width signal output
For pre-set minimum duty cycle.
Further, opened loop control pulse-width signal.
Through the above technical solutions, opened loop control can allow welding machine to have good starting state, it will not be because of input electricity
It flows lower and allows welding machine long-time oepration at full load.
Compared with prior art, it the beneficial effects of the present invention are: setting the cycle time of acquisition data, waits and examines periodically
The input current of inverter is surveyed, different phase detects input current using different filter factors, sentences according to input current
It is broken the contact condition of rifle and workpiece, is judged according to the variation for the output pulse width for realizing the stable inverter of input current
Contact condition out is accurate and detects hardware without additional setting, and the voltage and current without detecting source of welding current output end is believed
Number, welding machine cost is reduced, welding machine job stability is improved.
Detailed description of the invention
Fig. 1 is the flow chart of the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment
A kind of promotion arc start control method of inverter type welder, based on the constant-current supply including inverter, constant-current supply
Input current is controlled by the output pulse width in inverter, in inverter there is MCU or DSP etc. to control chip.It is inverse
Chip is controlled in variable power source can control inversion driving chip offer output electric current, and inversion driving chip can be metal-oxide-semiconductor or electric power
Under normal circumstances, inversion driving chip can form full-bridge and be exported thyristor, control the conducting duration energy of inversion driving chip
Enough adjust the output electric current of inverter.
As shown in Figure 1, method includes the following steps:
Step S0: before the starting the arc, the duty ratio of opened loop control pulse-width signal output is pre-set minimum duty cycle.Most
Small duty ratio be storable in control chip flash memory in, or be stored in control chip outside flash memory disk or
In eeprom memory, control chip can read the minimum duty cycle of storage at work.Compared to the control mode of closed loop, example
Such as PID closed-loop control, early period is excessive with desired value gap due to exporting, and integral coefficient is easy to allow the defeated of PID closed-loop control
Reach state at full capacity out, and opened loop control can allow welding machine to have good starting state, will not because of input current compared with
It is low and allow welding machine long-time oepration at full load.Wherein, minimum duty cycle is small duty ratio for welding machine, and small duty ratio can be very
The output spike electric current of the short-circuit number case of good inhibition.
Step S1: output narrow spaces X1, wait acquisition input current I periodicallyin, according to input current IinNumerical value judge
The contact condition of welding gun and workpiece.It is detected periodically using current sensor in the prior art according to cycle time of setting etc.
Input current Iin, the numerical value unit after detection can be mA or binary numeral.Current sensor is electrically connected with control
Device, controller can be the control chip of the industry spots such as MCU, DSP or PLC, and chip has the hardware such as IIC, SPI, ADC, DAC
Module, therefore input current I can be receivedinNumerical value.
As input current IinIn continuous set period of time T1Inside all it is higher than threshold electric current I1, then it is judged as that welding gun is filled with workpiece
Tap touching.Acquire the input current I in continuous N number of periodinAnd average value is calculated as final Iin, wherein N is input current
Sampling filter coefficient.The input current of sampling is filtered, the accuracy of the input current output of acquisition is improved, improves
To the interference free performance of extraneous unfavorable factor.
Step S2: output pick-up current IstIt waits welding gun to be promoted, sets pulse-width regulated datum quantity W1, output pulse width tune
Section amount is X2, when welding gun is promoted to setting height H1, calculate output pulse width regulated quantity X2Greater than setting pulse-width regulated benchmark
Measure W1Then it is judged as that welding gun has been promoted.When welding gun is not promoted, the impedance between welding gun and workpiece is small, and input current is easy to reach
The value and stabilization of setting, therefore output pulse width is narrow, after welding gun is promoted, the impedance between welding gun and workpiece becomes larger, constant current
Power supply needs that input current is kept to remain unchanged to reach the value and stabilization of setting, therefore can widen output pulse width, that is, passes through X2Greatly
In X1It can judge the working condition of welding gun and workpiece.In actual operation, due to the working capability finite of constant-current supply,
Operating current after welding gun is promoted can be less than the operating current before welding gun is promoted.
Step S3: when detecting that welding gun leaves workpiece, pick-up current I is exportedstIn TsOutput welding electricity is gradient in time
Flow Iout, into the normal weld stage.
Step S4: in the normal weld stage, as input current IinContinuous time TminIt is interior to be lower than minimum value IminWhen, then it is disconnected
Arc.In current interruption deterministic process, input current I is detected as long as having 1 timeinHigher than threshold electric current I1Then restart timing Tmin,
Into the normal weld stage.Not all the same in input current sampling filter coefficient of the step S1 into step S4, welding machine is in non-
Input current sampling filter coefficient N when normal weld state is less than input current sampling when welding machine is in normal weld state
Filter factor N.
The cycle time for setting acquisition data waits the input current for detecting inverter periodically, according to input current
Judge the contact condition of welding gun and workpiece, different phase detects input current, improper welding using different filter factors
Greatly, therefore filter factor is small is avoided that elimination for input current variation when input current when state changes than normal weld state
The input current variable quantity needed.Judged according to the variation for the output pulse width for realizing the stable inverter of input current
Contact condition it is accurate and detect hardware without additional setting, without detecting the voltage and current signals of source of welding current output end,
Welding machine cost is reduced, welding machine job stability is improved.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of promotion arc start control method of inverter type welder, which comprises the steps of:
Step S1: output narrow spaces X1, wait acquisition input current I periodicallyin, according to input current IinNumerical value judge welding gun
With the contact condition of workpiece；
Step S2: output pick-up current IstIt waits welding gun to be promoted, sets pulse-width regulated datum quantity W1, output pulse width regulated quantity
For X2, when welding gun is promoted to setting height H1, calculate output pulse width regulated quantity X2Greater than setting pulse-width regulated datum quantity W1
Then it is judged as that welding gun has been promoted；
Step S3: when detecting that welding gun leaves workpiece, pick-up current I is exportedstIn TsOutput welding current is gradient in time
Iout, into the normal weld stage.
2. the promotion arc start control method of inverter type welder according to claim 1, which is characterized in that in the step S1,
As input current IinIn continuous set period of time T1Inside all it is higher than threshold electric current I1, then it is judged as that welding gun comes into full contact with workpiece.
3. the promotion arc start control method of inverter type welder according to claim 1, which is characterized in that step S4: normal
The welding stage, as input current IinContinuous time TminIt is interior to be lower than minimum value IminWhen, then it is current interruption.
4. the promotion arc start control method of inverter type welder according to claim 3, which is characterized in that in current interruption deterministic process
In, input current I is detected as long as having 1 timeinHigher than threshold electric current I1Then restart timing Tmin, into the normal weld stage.
5. the promotion arc start control method of inverter type welder according to claim 1, which is characterized in that acquire continuous N number of week
The input current I of phaseinAnd average value is calculated as final Iin, wherein N is input current sampling filter coefficient.
6. the promotion arc start control method of inverter type welder according to claim 5, which is characterized in that in step S1 to step
Input current sampling filter coefficient in S4 is not all the same, and filter factor when welding machine is in improper welded condition is less than welding machine
Filter factor when in normal weld state.
7. the promotion arc start control method of inverter type welder according to claim 6, which is characterized in that also wrapped before step S1
Include step S0: before the starting the arc, the duty ratio of control pulse-width signal output is pre-set minimum duty cycle.
8. the promotion arc start control method of inverter type welder according to claim 7, which is characterized in that opened loop control pulsewidth tune
Signal processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910473782.3A CN110340488B (en) | 2019-06-01 | 2019-06-01 | Lifting arc striking control method of inverter welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910473782.3A CN110340488B (en) | 2019-06-01 | 2019-06-01 | Lifting arc striking control method of inverter welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110340488A true CN110340488A (en) | 2019-10-18 |
| CN110340488B CN110340488B (en) | 2021-02-09 |
Family
ID=68174143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910473782.3A Active CN110340488B (en) | 2019-06-01 | 2019-06-01 | Lifting arc striking control method of inverter welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110340488B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940872A (en) * | 2020-07-29 | 2020-11-17 | 上海广为焊接设备有限公司 | Output current control system and method for argon arc welding machine |
| CN114273752A (en) * | 2021-12-10 | 2022-04-05 | 深圳市佳士科技股份有限公司 | Thermal arc striking control method of welding machine, welding machine driving circuit and welding machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107316A (en) * | 2009-12-23 | 2011-06-29 | 上海沪工电焊机(集团)有限公司 | Sequential control scheme for vertically lifting arc strike |
| CN203227917U (en) * | 2013-05-26 | 2013-10-09 | 惠州中坚电子有限公司 | Novel automatic arc striking current adjusting/control circuit of energy-saving inverter electric welding machine |
| CN204035761U (en) * | 2014-08-29 | 2014-12-24 | 上海沪工焊接集团股份有限公司 | Welding machine arc ignition control circuit |
| CN106891075A (en) * | 2017-01-19 | 2017-06-27 | 上海广为焊接设备有限公司 | Control inverter type welder arc ignition system and its method of work |
| US20170252850A1 (en) * | 2014-09-08 | 2017-09-07 | Daihen Corporation | Arc welding control method |
| CN107866622A (en) * | 2017-12-27 | 2018-04-03 | 张胜男 | A kind of new TIG welds built-in lifting arc strike control device |
-
2019
- 2019-06-01 CN CN201910473782.3A patent/CN110340488B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107316A (en) * | 2009-12-23 | 2011-06-29 | 上海沪工电焊机(集团)有限公司 | Sequential control scheme for vertically lifting arc strike |
| CN203227917U (en) * | 2013-05-26 | 2013-10-09 | 惠州中坚电子有限公司 | Novel automatic arc striking current adjusting/control circuit of energy-saving inverter electric welding machine |
| CN204035761U (en) * | 2014-08-29 | 2014-12-24 | 上海沪工焊接集团股份有限公司 | Welding machine arc ignition control circuit |
| US20170252850A1 (en) * | 2014-09-08 | 2017-09-07 | Daihen Corporation | Arc welding control method |
| CN106891075A (en) * | 2017-01-19 | 2017-06-27 | 上海广为焊接设备有限公司 | Control inverter type welder arc ignition system and its method of work |
| CN107866622A (en) * | 2017-12-27 | 2018-04-03 | 张胜男 | A kind of new TIG welds built-in lifting arc strike control device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940872A (en) * | 2020-07-29 | 2020-11-17 | 上海广为焊接设备有限公司 | Output current control system and method for argon arc welding machine |
| CN114273752A (en) * | 2021-12-10 | 2022-04-05 | 深圳市佳士科技股份有限公司 | Thermal arc striking control method of welding machine, welding machine driving circuit and welding machine |
| CN114273752B (en) * | 2021-12-10 | 2023-06-02 | 深圳市佳士科技股份有限公司 | Thermal arc striking control method suitable for inversion manual welding machine and welding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110340488B (en) | 2021-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104218646B (en) | A kind of portable power source charging circuit | |
| CN101119066B (en) | Switching regulator | |
| CN102187737B (en) | Circuit for the operation of at least one LED | |
| CN105048613B (en) | A kind of intelligent charger for electric bicycle | |
| CN103378617B (en) | Lithium battery charging circuit | |
| CN102377336A (en) | Switching power source apparatus | |
| CN110340488A (en) | A kind of promotion arc start control method of inverter type welder | |
| CN109149931B (en) | Slope-error compensation circuit for peak value comparison method BUCK converter | |
| CN104617558B (en) | Power supply short-circuit protective circuit | |
| JP2007020299A (en) | Charger | |
| CN102186292A (en) | Primary edge current reference generating circuit and method for high power factor constant-current switch power supply | |
| CN105119485B (en) | A kind of charge pump circuit | |
| CN101510725B (en) | Detection and control scheme for current output of up-down voltage power current converter | |
| CN115693873A (en) | Feedback adjustment charging circuit and electronic equipment | |
| US9615404B2 (en) | Consumable electrode arc welding method | |
| CN102742136B (en) | Buck dc-dc and ON-OFF control circuit | |
| CN107070190B (en) | Power supply device and capacitance heating control method thereof | |
| CN104339068A (en) | Method for controlling neck detection for welding power supply | |
| CN110831284B (en) | LED driving power supply and controller thereof | |
| CN103283081B (en) | A kind of lead sulfate attachment removal device and method | |
| CN108574323A (en) | A kind of battery charge control circuit | |
| CN2744056Y (en) | Switch power controller | |
| CN112469165A (en) | LED driving circuit and method | |
| CN113691133B (en) | BUCK-BOOST with high-precision low-ripple light-load working mode | |
| KR101018647B1 (en) | Charging device charging capacitor by solar cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |