CN102717170B - A kind of welding method of manual metal-arc welding connection device of apply pulse electric current - Google Patents
A kind of welding method of manual metal-arc welding connection device of apply pulse electric current Download PDFInfo
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- CN102717170B CN102717170B CN201210178456.8A CN201210178456A CN102717170B CN 102717170 B CN102717170 B CN 102717170B CN 201210178456 A CN201210178456 A CN 201210178456A CN 102717170 B CN102717170 B CN 102717170B
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Abstract
The invention discloses a kind of welding method of manual metal-arc welding connection device of apply pulse electric current, comprise the following steps: be 1., AC rectification direct current; 2., the direct current that 1. obtains of step by waveform generator, be high-frequency impulse ripple by control unit control waveform generator by DC conversion, include striking wave band and service band; 3., the high-frequency impulse ripple that 2. obtains of step by transformer, by no-load voltage ratio amplified current value; 4., step 3. in amplify after pulse current rectification again, export be applicable to welding gun use output current, part output current feeds back to control unit by the connection between secondary rectification module and control unit.Adopt welding method of the present invention, can reach energy-conservation, reduce the effect of input current etc.; In addition, welding method of the present invention also can be used for carrying out plate sheet welding.
Description
Technical field
The present invention relates to a kind of welding method of manual metal-arc welding connection device of apply pulse electric current.
Background technology
The basic functional principle of electric welding is the commercial power of our 220V voltage of passing through to commonly use or 380V, voltage is reduced by the pressure reducer in electric welding machine, enhance electric current, and make electric energy produce huge electric arc heat thawing iron and steel, and incorporating of welding rod makes the amalgamation between iron and steel higher.Arc welding is current most widely used welding method, and it includes: manual metal-arc welding, submerged-arc welding, shielded arc welding of tungsten electrode gas, plasma arc welding (PAW), gas metal-arc welding etc.
Manual metal-arc welding be develop the earliest in various arc welding method, at present still most widely used a kind of welding method.It is that the welding rod scribbling coating (coating) with outside is made electrode and fills metal, and electric arc burns between the end of welding rod and welded piece surface.Coating (coating) can produce gas to protect electric arc at arc heat effect further aspect, and can produce slag covers weld pool surface on the other hand, prevents molten metal and ambient gas from interacting and generates oxide; The more important function of slag produces physical-chemical reaction with deposite metal or adds alloying element, improves weld metal performance.Manual metal-arc welding equipment is simple, light, flexible operation, can be applied to the welding of the short seam in maintenance and assembling, particularly may be used for the welding at unapproachable position.The corresponding welding rod of manual metal-arc welding adapted is applicable to most industry carbon steel, stainless steel, cast iron, copper, aluminium, nickel and alloy thereof.
Manual arc welder common on the market mainly contains DC welder and AC welding set now, is wherein configured with transformer and rectification module in DC welder, during alternating current input, after transformer transformation, then by rectifier rectification, exports the direct current into low-voltage, high-current.Existing hand arc DC welder output current is operationally no less than 120A, power output is no less than 4000W, energy consumption is large, when input voltage is 220V, its input current is about 20A, and input current is large, require higher to environment for use, be not suitable for using (electric wire in home environment is comparatively thin, holds fire hazardous when current is excessive, be therefore provided with overcurrent protection and its action setting value is general not higher than 60A) in home environment; Simultaneously the transformer voltage ratio of DC welder is large, needs coil more around the home, cause that the volume of welding machine is large, weight greatly, be inconvenient to carry.In addition, because the welding current of existing DC welder is comparatively large, when being applied in plate sheet welding, thin plate easily burns by the electric arc that lasting big current produces.
Summary of the invention
In order to solve, existing manual arc welder energy consumption is large, input current large, be not easy to the problem of easily burning thin plate when family uses and uses, and the object of the present invention is to provide a kind of welding method of manual metal-arc welding connection device of apply pulse electric current.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of welding method of manual metal-arc welding connection device of apply pulse electric current, described welder comprises the rectification module, waveform generator, transformer and the secondary rectification module that connect successively, described waveform generator is MOSFET FET circuit, also comprise a control unit, the output of control unit connects waveform generator, high-frequency impulse waveform is produced for control waveform generator, the input of described rectification module connects power supply, the output of described secondary rectification module connects welding gun, the input of the output of secondary rectification module also connection control unit; Described welding method comprises the following steps:
1., the alternating current of input by rectification module, rectification is direct current, 2., the direct current that 1. step obtains passes through waveform generator, be high-frequency impulse ripple by control unit control waveform generator by DC conversion, described high-frequency impulse ripple comprises the service band of striking wave band t1 for welding rod striking and periodic cycle, striking wave band comprises crest segment I t3 and paddy section t4 that are arranged alternately, the one-period t2 of described service band comprises crest segment II t5 for scratch start, for the rear t7 of the stage casing t6 and low current that provide operating current, the current value of described crest segment I t3 is equal with the current value of crest segment II t5, the current value of described paddy section t4 is equal with the current value of stage casing t6, 3., the high-frequency impulse ripple that 2. obtains of step by transformer, by no-load voltage ratio amplified current value, 4., step 3. in amplify after pulse current by secondary rectification module, rectification again, export the output current being applicable to welding gun and using, part output current feeds back to control unit by the connection between secondary rectification module and control unit, makes control unit better improve high-frequency impulse ripple.
Supplementing as above-mentioned welding method, in described striking wave band t1, the current value of crest segment I t3 is no less than 100A, and be preferably 160A, duration when crest segment I t3 is by exporting after secondary rectification module is 20 ~ 100ms; The current value of paddy section t4 is 20 ~ 80A, and be preferably 70A, duration when paddy section t4 is by exporting after secondary rectification module is 50 ~ 200ms; Duration when striking wave band t1 is by exporting after secondary rectification module is 1000 ~ 3000ms.In described service band, the current value of crest segment II t5 is no less than 100A, and be preferably 160A, duration when crest segment II t5 is by exporting after secondary rectification module is 20 ~ 100ms; The current value of stage casing t6 is 20 ~ 80A, and be preferably 70A, duration when stage casing t6 is by exporting after secondary rectification module is 200 ~ 800ms; The current value of rear t7 is 0A, and duration when rear t7 is by exporting after secondary rectification module is 200 ~ 800ms.
Effective effect of the present invention is: welding method of the present invention exports pulse current and welds, and includes striking wave band t1 and service band in pulse current.In striking wave band t1 big current crest segment I t3 and provide the paddy section t4 of operating current to be arranged alternately, guarantee that welding rod has enough energy for striking when starting working, make striking operate be more prone to successfully.The one-period t2 of service band comprises crest segment II t5, stage casing t6 and rear t7, wherein acting is crest segment II t5 and stage casing t6, after crest segment II t5 adopts big current scratch start, enter stage casing t6, there is provided current value to be about the operating current of crest segment II t5 current value half, support welding rod electric discharge work, the current value of rear t7 is 0, welding rod is had a rest, reduces the mean power of service band simultaneously.Contrast with existing single flow manual arc welder, under the prerequisite obtaining same weld effect, the manual metal-arc welding connection device power output of apply pulse electric current of the present invention is the half or lower of DC welder power output, greatly reduces energy consumption; Power output reduces makes input current reduce simultaneously, makes welder of the present invention be applicable in home environment; And the reduction of average operating current, temperature when reducing welding between welding rod and mother metal, not easily burns mother metal, makes welder of the present invention can be used for carrying out plate sheet welding.
As the further improvement of technique scheme, the beginning Duan Weigu section t4 of described striking wave band t1, in paddy section t4, welding rod carries out preheating, avoids to start the excessive welding rod that causes of electric current and be bonded at situation on mother metal.
As the further improvement of technique scheme, described high-frequency impulse wave frequency be 20KHz and more than, pulse wave frequency is higher, transformation process is easier, reduce the coil requirement of transformer, reduce the volume and weight of transformer, make the volume of manual metal-arc welding connection device of the present invention little, lightweight.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is electrical principle block diagram of the present invention;
Current waveform when Fig. 2 is welder of the present invention work.
Detailed description of the invention
With reference to Fig. 1, the manual metal-arc welding connection device of a kind of apply pulse electric current provided by the invention, comprise rectification module 1, waveform generator 2, transformer 3, secondary rectification module 4 and control unit 5, rectification module 1 can be full-wave bridge rectifier circuit, for alternating current is converted to direct current; Waveform generator 2 is MOSFET FET circuit or IGBT insulated gate bipolar transistor circuit, for generation of high-frequency impulse waveform; Transformer 3 is step-down transformer; Secondary rectification module 4, for carrying out rectification again to the electric current after transformation, exports the electric current being applicable to welding gun and using; Control unit 5 is a singlechip chip or PLC chip and peripheral circuit thereof, according to the waveform shape of the programme-control high-frequency impulse waveform inputted in chip.In the present invention, rectification module 1, waveform generator 2, transformer 3, secondary rectification module 4 connect successively, the input of rectification module 1 connects power supply, the output of secondary rectification module 4 connects welding gun, the output of control unit 5 connects waveform generator 2, the output of the input connecting secondary rectification module 4 of control unit 5, for receiving the output current that feeds back and according to the waveform shape of feedback circuit adjustment high-frequency impulse waveform.
A welding method for the manual metal-arc welding connection device of apply pulse electric current, comprises the following steps: 1., the alternating current of input by rectification module 1, rectification is direct current; 2., the direct current that 1. obtains of step is by waveform generator 2, be high-frequency impulse ripple by control unit 5 control waveform generator by DC conversion, Fig. 2 is the waveform of high-frequency impulse ripple, and described high-frequency impulse ripple comprises the service band of striking wave band t1 for welding rod striking and periodic cycle.Striking wave band t1 comprises crest segment I t3 and paddy section t4 that are arranged alternately, wherein starts Duan Weigu section t4; The current value of crest segment I t3 is no less than 100A, and duration when being preferably 160A, crest segment I t3 by exporting after secondary rectification module 4 is 20 ~ 100ms, as adopted 50ms; The current value of paddy section t4 is 20 ~ 80A, and duration when being preferably 70A, paddy section t4 by exporting after secondary rectification module 4 is 50 ~ 200ms, as adopted 150ms; Duration when striking wave band t1 is totally by exporting after secondary rectification module 4 is 1000 ~ 3000ms, as adopted 2000ms.The one-period t2 of described service band comprises crest segment II t5 for scratch start, the current value of crest segment II t5 is no less than 100A, duration when being preferably 160A, crest segment II t5 by exporting after secondary rectification module 4 is 20 ~ 100ms, preferably equal with the time of crest segment I t3; For providing the stage casing t6 of operating current, the current value of stage casing t6 is 20 ~ 80A, and duration when being preferably 70A, stage casing t6 by exporting after secondary rectification module 4 is 200 ~ 800ms, as adopted 500ms; The current value of the rear t7 of low current, rear t7 is 0A, and duration when rear t7 is by exporting after secondary rectification module 4 is 200 ~ 800ms, as adopted 500ms.3., the high-frequency impulse ripple that 2. obtains of step by transformer 3, by no-load voltage ratio amplified current value; 4., step 3. in amplify after pulse current by secondary rectification module 4, rectification again, export the output current being applicable to welding gun and using, part output current feeds back to control unit by the connection between secondary rectification module 4 and control unit 5, makes control unit 5 better improve high-frequency impulse ripple.When welding machine is stopped using, after dwell time exceedes 1.3 times of rear t7, control unit 5 automatically resets, and again enters service band through striking wave band t1 under welding machine during task.
Welding method of the present invention exports pulse current and welds, and includes striking wave band t1 and service band in pulse current.In striking wave band t1 big current crest segment I t3 and provide the paddy section t4 of operating current to be arranged alternately, guarantee that welding rod has enough energy for striking when starting working, make striking operate be more prone to successfully.The one-period t2 of service band comprises crest segment II t5, stage casing t6 and rear t7, wherein acting is crest segment II t5 and stage casing t6, after crest segment II t5 adopts big current scratch start, enter stage casing t6, there is provided current value to be about the operating current of crest segment II t5 current value half, support welding rod electric discharge work, the current value of rear t7 is 0, welding rod is had a rest, reduces the mean power of service band simultaneously.
As the further improvement of technique scheme, described high-frequency impulse wave frequency be 20KHz and more than, pulse wave frequency is higher, transformation process is easier, reduce the coil requirement of transformer 3, reduce the volume and weight of transformer 3, make the volume of manual metal-arc welding connection device of the present invention little, lightweight.
Contrast with existing single flow manual arc welder, under the prerequisite obtaining same weld effect, the manual metal-arc welding connection device power output of apply pulse electric current of the present invention is the half or lower of DC welder power output, greatly reduces energy consumption; Power output reduces makes input current reduce simultaneously, makes welder of the present invention be applicable in home environment; And the reduction of average operating current, temperature when reducing welding between welding rod and mother metal, not easily burns mother metal, makes welder of the present invention can be used for carrying out plate sheet welding.
The foregoing is only preferred embodiments of the present invention, but the present invention is not limited to above-mentioned example, as long as the technical scheme realizing the object of the invention with basic same approach all belongs within protection scope of the present invention.
Claims (9)
1. the welding method of the manual metal-arc welding connection device of an apply pulse electric current, described welder comprises the rectification module (1) connected successively, waveform generator (2), transformer (3) and secondary rectification module (4), described waveform generator (2) is MOSFET FET circuit, also comprise a control unit (5), the output of control unit (5) connects waveform generator (2), high-frequency impulse waveform is produced for control waveform generator (2), the input of described rectification module (1) connects power supply, the output of described secondary rectification module (4) connects welding gun, the input of the output of secondary rectification module (4) also connection control unit (5), it is characterized in that, described welding method comprises the following steps:
1., the alternating current of input by rectification module (1), rectification is direct current;
2., the direct current that 1. step obtains is by waveform generator (2), be high-frequency impulse ripple by control unit (5) control waveform generator (2) by DC conversion, described high-frequency impulse ripple comprises the service band (t2) of striking wave band (t1) for welding rod striking and periodic cycle, striking wave band comprises the crest segment I (t3) and paddy section (t4) that are arranged alternately, the one-period of described service band comprises the crest segment II (t5) for scratch start, for the rear (t7) in the stage casing (t6) and low current that provide operating current, the current value of described crest segment I (t3) is equal with the current value of crest segment II (t5), the current value of described paddy section (t4) is equal with the current value of stage casing (t6),
3., the high-frequency impulse ripple that 2. obtains of step by transformer (3), by no-load voltage ratio amplified current value;
4., step 3. in amplify after pulse current by secondary rectification module (4), rectification again, export the output current being applicable to welding gun and using, part output current feeds back to control unit (5) by the connection between secondary rectification module (4) and control unit (5).
2. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 1, it is characterized in that: in described striking wave band (t1), the current value of crest segment I (t3) is no less than 100A, and duration when crest segment I (t3) is exported afterwards by secondary rectification module (4) is 20 ~ 100ms; The current value of paddy section (t4) is 20 ~ 80A, and duration when paddy section (t4) is exported afterwards by secondary rectification module (4) is 50 ~ 200ms; Duration when striking wave band (t1) is exported afterwards by secondary rectification module (4) is 1000 ~ 3000ms.
3. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 2, is characterized in that: the beginning Duan Weigu section (t4) of described striking wave band (t1).
4. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 2, is characterized in that: the current value of described crest segment I (t3) is 160A.
5. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 2, is characterized in that: the current value of described paddy section (t4) is 70A.
6. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 1, it is characterized in that: in described service band, the current value of crest segment II (t5) is no less than 100A, and duration when crest segment II (t5) is exported afterwards by secondary rectification module (4) is 20 ~ 100ms; The current value in stage casing (t6) is 20 ~ 80A, and duration when stage casing (t6) is exported afterwards by secondary rectification module (4) is 200 ~ 800ms; The current value of rear (t7) is 0A, and duration when rear (t7) is exported afterwards by secondary rectification module (4) is 200 ~ 800ms.
7. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 6, is characterized in that: the current value of described crest segment II (t5) is 160A.
8. the welding method of the manual metal-arc welding connection device of a kind of apply pulse electric current according to claim 6, is characterized in that: the current value of described stage casing (t6) is 70A.
9., according to the welding method of the manual metal-arc welding connection device of the arbitrary described a kind of apply pulse electric current of claim 1 to 8, it is characterized in that: described high-frequency impulse wave frequency be 20KHz and more than.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210178456.8A CN102717170B (en) | 2012-06-01 | 2012-06-01 | A kind of welding method of manual metal-arc welding connection device of apply pulse electric current |
| PCT/CN2013/076024 WO2013178028A1 (en) | 2012-06-01 | 2013-05-22 | Hand arc welding device applying pulse current and welding method thereof |
| JP2015514338A JP2015519203A (en) | 2012-06-01 | 2013-05-22 | Hand arc welding apparatus applying pulse current and welding method thereof |
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| CN201210178456.8A CN102717170B (en) | 2012-06-01 | 2012-06-01 | A kind of welding method of manual metal-arc welding connection device of apply pulse electric current |
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| CN102717170A CN102717170A (en) | 2012-10-10 |
| CN102717170B true CN102717170B (en) | 2015-12-09 |
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| CN106180974B (en) * | 2016-08-09 | 2019-05-17 | 上海广为焊接设备有限公司 | Reequip the device and method that direct-flow argon-arc welder is pulse argon arc welding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101579776A (en) * | 2009-03-04 | 2009-11-18 | 深圳市佳士科技发展有限公司 | Portable type IGBT invert arc welding machine |
| CN202780174U (en) * | 2012-06-01 | 2013-03-13 | 江门市保值久机电有限公司 | Manual metal-arc welding device utilizing pulse currents |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201183161Y (en) * | 2008-04-16 | 2009-01-21 | 深圳市佳士科技发展有限公司 | Alternating current-direct current inversion type pulse argon arc-welding set |
| JP5557238B2 (en) * | 2008-12-24 | 2014-07-23 | 株式会社ダイヘン | AC pulse arc welding control method |
| CN201371304Y (en) * | 2009-03-04 | 2009-12-30 | 深圳市佳士科技发展有限公司 | Portable IGBT (insulated-gate bipolar transistor) inverter electric-arc welding machine |
| JP5071543B2 (en) * | 2010-10-04 | 2012-11-14 | 株式会社安川電機 | Arc welding apparatus and arc welding system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101579776A (en) * | 2009-03-04 | 2009-11-18 | 深圳市佳士科技发展有限公司 | Portable type IGBT invert arc welding machine |
| CN202780174U (en) * | 2012-06-01 | 2013-03-13 | 江门市保值久机电有限公司 | Manual metal-arc welding device utilizing pulse currents |
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