CN102717170A - Hand arc welding device and welding method applying pulse current - Google Patents
Hand arc welding device and welding method applying pulse current Download PDFInfo
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- CN102717170A CN102717170A CN2012101784568A CN201210178456A CN102717170A CN 102717170 A CN102717170 A CN 102717170A CN 2012101784568 A CN2012101784568 A CN 2012101784568A CN 201210178456 A CN201210178456 A CN 201210178456A CN 102717170 A CN102717170 A CN 102717170A
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Abstract
The invention discloses a hand arc welding device applying pulse current. The hand arc welding device comprises a rectifier module, a waveform generator, a transformer and a secondary rectifier module which are sequentially connected. The hand arc welding device further comprises a control unit, wherein the output terminal of the control unit is connected with the waveform generator for controlling the waveform generator to generate a high-frequency pulse waveform; the output terminal of the secondary rectifier module is connected with a power supply; and the output terminal of the secondary rectifier module is connected with a welding gun and the input terminal of the control unit. The waveform generator and the control unit are arranged in the hand arc welding device disclosed by the invention; and the welding is carried out by applying the pulse current, and thus the effects of saving energy, reducing input current and the like are achieved. The invention further discloses a welding method for welding by applying the pulse current.
Description
Technical field
The present invention relates to a kind of manual metal-arc welding tipping and put, and this manual metal-arc welding is hinged with the welding method of putting.
Background technology
The basic functional principle of electric welding is us through 220V voltage of using always or the commercial power of 380V; Pressure reducer through in the electric welding machine has reduced voltage; Strengthened electric current, and made electric energy produce huge electric arc heat to melt iron and steel, and welding rod to incorporate the amalgamation that makes between the iron and steel higher.Arc welding is present 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 is that the widest a kind of welding method is still used in development the earliest, at present in the various arc welding methods.It is to make electrode and fill metal with the welding rod that the outside scribbles coating (coating), and electric arc is between the end of welding rod and welded piece surface, to burn.Coating (coating) can produce gas on the one hand with protection electric arc under the arc heat effect, can produce slag on the other hand and cover weld pool surface, prevents that the interaction of molten metal and ambient gas from generating oxide; The more important function of slag is to produce physical-chemical reaction or add alloying element with the deposite metal, improves the weld metal performance.Manual metal-arc welding equipment is simple, light, flexible operation, and the welding of the short seam in can being applied to keep in repair and assemble particularly can be used for the welding at unapproachable position.The corresponding welding rod of manual metal-arc welding adapted is applicable to most of industrial carbon steels, stainless steel, cast iron, copper, aluminium, nickel and alloy thereof.
Common on the market manual arc welder mainly contains DC welder and AC welding set now, wherein disposes transformer and rectification module in the DC welder, during the alternating current input, after the transformer transformation, again by rectifier rectification, is output as the direct current of low-voltage, high-current.The output current of existing hand arc DC welder when work is no less than 120A, and power output is no less than 4000W, and energy consumption is big; When input voltage was 220V, its input current was about 20A, and input current is big; Environment for use is had relatively high expectations; Be not suitable in home environment using (electric wire in the home environment is thinner, when electric current is excessive, causes fire easily, therefore be provided with overcurrent protection and its action setting value generally is not higher than 60A); Simultaneously the transformer voltage ratio of DC welder is big, needs more around the home coil, causes the volume of welding machine big, weight is big, is inconvenient to carry.In addition, because the welding current of existing DC welder is bigger, when being applied in plate sheet welding, the electric arc that lasting big electric current produces burns thin plate easily.
Summary of the invention
Existing manual arc welder energy consumption is big, input current big in order to solve, be not easy to the problem of burning thin plate easily when family uses and uses, and the manual metal-arc welding tipping that the object of the present invention is to provide a kind of apply pulse electric current to weld is put and welding method.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of manual metal-arc welding tipping of apply pulse electric current is put; Comprise the rectification module, waveform generator, transformer and the secondary rectification module that connect successively; Also comprise a control module, the output of control module connects waveform generator and is used for control waveform generator generation high-frequency impulse waveform, and the input of said rectification module connects power supply; The output of said secondary rectification module connects welding gun, and the output of secondary rectification module also connects the input of control module.Be provided with waveform generator and control module among the present invention, the apply pulse electric current welds, and reaches energy-conservation, reduces the effect of input current etc.
1., the alternating current of input is through rectification module the welding method that above-mentioned manual metal-arc welding tipping is put may further comprise the steps:, rectification is a direct current; 2., the direct current that 1. obtains of step passes through waveform generator; By control module control waveform generator direct current is converted into the high-frequency impulse ripple; Said high-frequency impulse ripple comprises the striking wave band t1 that is used for the welding rod striking and the service band of periodic cycle; Comprise the crest segment I t3 and the paddy section t4 that are arranged alternately in the striking wave band; Comprise the crest segment II t5 that is used for scratch start among the one-period t2 of said service band, be used to provide the stage casing t6 of operating current and the rear t7 of low current, the current value of said crest segment I t3 to equate that with the current value of crest segment II t5 the current value of said paddy section t4 equates with the current value of stage casing t6; 3., the high-frequency impulse ripple that 2. obtains of step is through transformer, by no-load voltage ratio amplified current value; 4., the pulse current after the 3. middle amplification of step is through the secondary rectification module; Rectification once more; Output is fit to the output current that welding gun uses, and the part output current feeds back to control module through being connected between secondary rectification module and the control module, makes control module better improve the high-frequency impulse ripple.
As replenishing of above-mentioned welding method, among the said striking wave band t1, the current value of crest segment I t3 is no less than 100A, is preferably 160A, crest segment I t3 through the secondary rectification module after duration during output be 20 ~ 100ms; The current value of paddy section t4 is 20 ~ 80A, is preferably 70A, paddy section t4 through the secondary rectification module after duration in when output be 50 ~ 200ms; Striking wave band t1 through the secondary rectification module after duration in when output be 1000 ~ 3000ms.In the said service band, the current value of crest segment II t5 is no less than 100A, is preferably 160A, crest segment II t5 through the secondary rectification module after duration in when output be 20 ~ 100ms; The current value of stage casing t6 is 20 ~ 80A, is preferably 70A, stage casing t6 through the secondary rectification module after duration in when output be 200 ~ 800ms; The current value of rear t7 is 0A, rear t7 through the secondary rectification module after duration in when output be 200 ~ 800ms.
Welding method output pulse current of the present invention welds, and includes striking wave band t1 and service band in the pulse current.Among the striking wave band t1 crest segment I t3 of big electric current with provide the paddy section t4 of operating current to be arranged alternately, guarantee that welding rod has enough energy to be used for striking when starting working, make the striking operation be more prone to success.Comprise crest segment II t5, stage casing t6 and rear t7 among the one-period t2 of service band, wherein acting is crest segment II t5 and stage casing t6, after crest segment II t5 adopts big electric current scratch start; Get into stage casing t6; Provide current value to be about the half the operating current of crest segment II t5 current value, support welding rod discharge work, the current value of rear t7 is 0; Make welding rod obtain having a rest, reduce the mean power of service band simultaneously.Compare with existing single flow manual arc welder, under the prerequisite that obtains the same weld effect, it is the half the or lower of DC welder power output that power output is put in the manual metal-arc welding of apply pulse electric current of the present invention tipping, significantly reduces energy consumption; Power output reduces reduces input current simultaneously, makes welder of the present invention be applicable in the home environment; And the reduction of average operating current, the temperature when having reduced welding between welding rod and the mother metal is difficult for burning 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 said striking wave band t1, in paddy section t4, welding rod carries out preheating, has avoided the excessive welding rod that causes of beginning electric current to be bonded at the situation on the mother metal.
As the further improvement of technique scheme, said high-frequency impulse wave frequency is that the pulse wave frequency was high more more than 20KHz reached; The transformation process is easy more; Reduce the coil requirement of transformer, reduce the volume and weight of transformer, the volume that manual metal-arc welding tipping of the present invention is put is little, in light weight.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is an electrical principle block diagram of the present invention;
Current waveform when Fig. 2 is welder of the present invention work.
The specific embodiment
With reference to Fig. 1; The manual metal-arc welding tipping of a kind of apply pulse electric current provided by the invention is put; Comprise rectification module 1, waveform generator 2, transformer 3, secondary rectification module 4 and control module 5, rectification module 1 can be full-wave bridge rectifier circuit, is used for converting alternating current into direct current; Waveform generator 2 is MOSFET FET circuit or IGBT insulated gate bipolar transistor circuit, is used to produce the high-frequency impulse waveform; Transformer 3 is a step-down transformer; Secondary rectification module 4 is used for the electric current after the transformation is carried out rectification once more, and output is fit to the electric current that welding gun uses; Control module 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 of importing in the 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, and the output of secondary rectification module 4 connects welding gun, and the output of control module 5 connects waveform generator 2; The input of control module 5 connects the output of secondary rectification module 4, is used to receive the output current that feeds back and according to the waveform shape of feedback circuit adjustment high-frequency impulse waveform.
1., the alternating current of input is through rectification module 1 welding method that above-mentioned manual metal-arc welding tipping is put may further comprise the steps:, rectification is a direct current; 2., the direct current that 1. obtains of step is through waveform generator 2; By control module 5 control waveform generators direct current is converted into the high-frequency impulse ripple; Fig. 2 is the waveform of high-frequency impulse ripple, and said high-frequency impulse ripple comprises the striking wave band t1 that is used for the welding rod striking and the service band of periodic cycle.Comprise the crest segment I t3 and the paddy section t4 that are arranged alternately among the striking wave band t1, wherein begin Duan Weigu section t4; The current value of crest segment I t3 is no less than 100A, is preferably 160A, and the duration when crest segment I t3 exports through secondary rectification module 4 backs is 20 ~ 100ms, as adopting 50ms; The current value of paddy section t4 is 20 ~ 80A, is preferably 70A, and the duration when paddy section t4 exports through secondary rectification module 4 backs is 50 ~ 200ms, as adopting 150ms; Duration when striking wave band t1 totally exports through secondary rectification module 4 backs is 1000 ~ 3000ms, as adopting 2000ms.Comprise the crest segment II t5 that is used for scratch start among the one-period t2 of said service band; The current value of crest segment II t5 is no less than 100A; Be preferably 160A, the duration when crest segment II t5 exports through secondary rectification module 4 backs is 20 ~ 100ms, and preferably the time with crest segment I t3 equates; Be used to provide the stage casing t6 of operating current, the current value of stage casing t6 is 20 ~ 80A, is preferably 70A, and the duration when stage casing t6 exports through secondary rectification module 4 backs is 200 ~ 800ms, as adopting 500ms; The rear t7 of low current, the current value of rear t7 are 0A, and the duration when rear t7 exports through secondary rectification module 4 backs is 200 ~ 800ms, as adopting 500ms.3., the high-frequency impulse ripple that 2. obtains of step is through transformer 3, by no-load voltage ratio amplified current value; 4., the pulse current after the 3. middle amplification of step is through secondary rectification module 4; Rectification once more; Output is fit to the output current that welding gun uses; The part output current feeds back to control module through being connected between secondary rectification module 4 and the control module 5, makes control module 5 better improve the high-frequency impulse ripple.When welding machine was stopped using, after dwell time surpassed 1.3 times of rear t7, control module 5 automatically reset, and got into service band through striking wave band t1 again during task under the welding machine.
Welding method output pulse current of the present invention welds, and includes striking wave band t1 and service band in the pulse current.Among the striking wave band t1 crest segment I t3 of big electric current with provide the paddy section t4 of operating current to be arranged alternately, guarantee that welding rod has enough energy to be used for striking when starting working, make the striking operation be more prone to success.Comprise crest segment II t5, stage casing t6 and rear t7 among the one-period t2 of service band, wherein acting is crest segment II t5 and stage casing t6, after crest segment II t5 adopts big electric current scratch start; Get into stage casing t6; Provide current value to be about the half the operating current of crest segment II t5 current value, support welding rod discharge work, the current value of rear t7 is 0; Make welding rod obtain having a rest, reduce the mean power of service band simultaneously.
Further improvement as technique scheme; Said high-frequency impulse wave frequency is more than 20KHz reaches; The pulse wave frequency is high more, and the transformation process is easy more, reduces the coil requirement of transformer 3; Reduce the volume and weight of transformer 3, the volume that manual metal-arc welding tipping of the present invention is put is little, in light weight.
Compare with existing single flow manual arc welder, under the prerequisite that obtains the same weld effect, it is the half the or lower of DC welder power output that power output is put in the manual metal-arc welding of apply pulse electric current of the present invention tipping, significantly reduces energy consumption; Power output reduces reduces input current simultaneously, makes welder of the present invention be applicable in the home environment; And the reduction of average operating current, the temperature when having reduced welding between welding rod and the mother metal is difficult for burning mother metal, makes welder of the present invention can be used for carrying out plate sheet welding.
The above is merely preferential embodiment of the present invention, but the present invention is not limited to above-mentioned example, as long as realize that with basic identical means the technical scheme of the object of the invention all belongs within protection scope of the present invention.
Claims (10)
1. the manual metal-arc welding of apply pulse electric current tipping is put; It is characterized in that: comprise the rectification module (1), waveform generator (2), transformer (3) and the secondary rectification module (4) that connect successively; Also comprise a control module (5); The output of control module (5) connects waveform generator (2) and is used for control waveform generator (2) generation high-frequency impulse waveform; The input of said rectification module (1) connects power supply, and the output of said secondary rectification module (4) connects welding gun, and the output of secondary rectification module (4) also connects the input of control module (5).
2. the welding method that manual metal-arc welding tipping according to claim 1 is put is characterized in that may further comprise the steps:
1., the alternating current of input is through rectification module (1), rectification is a direct current;
2., the direct current that 1. obtains of step is through waveform generator (2); By control module (5) control waveform generator (2) direct current is converted into the high-frequency impulse ripple; Said high-frequency impulse ripple comprises the striking wave band t1 that is used for the welding rod striking and the service band t2 of periodic cycle; Comprise the crest segment I t3 and the paddy section t4 that are arranged alternately in the striking wave band; Comprise the crest segment II t5 that is used for scratch start in the one-period of said service band, be used to provide the stage casing t6 of operating current and the rear t7 of low current, the current value of said crest segment I t3 to equate that with the current value of crest segment II t5 the current value of said paddy section t4 equates with the current value of stage casing t6;
3., the high-frequency impulse ripple that 2. obtains of step is through transformer (3), by no-load voltage ratio amplified current value;
4., the pulse current after the 3. middle amplification of step is through secondary rectification module (4); Rectification once more; Output is fit to the output current that welding gun uses, and the part output current feeds back to control module (5) through being connected between secondary rectification module (4) and the control module (5).
3. the welding method that manual metal-arc welding tipping according to claim 2 is put, it is characterized in that: among the said striking wave band t1, the current value of crest segment I t3 is no less than 100A, and the duration when crest segment I t3 exports through secondary rectification module (4) back is 20 ~ 100ms; The current value of paddy section t4 is 20 ~ 80A, and the duration when paddy section t4 exports through secondary rectification module (4) back is 50 ~ 200ms; Duration when striking wave band t1 exports through secondary rectification module (4) back is 1000 ~ 3000ms.
4. the welding method that manual metal-arc welding tipping according to claim 3 is put is characterized in that: the beginning Duan Weigu section t4 of said striking wave band t1.
5. the welding method that manual metal-arc welding tipping according to claim 3 is put, it is characterized in that: the current value of said crest segment I t3 is 160A.
6. the welding method that manual metal-arc welding tipping according to claim 3 is put, it is characterized in that: the current value of said paddy section t4 is 70A.
7. the welding method that manual metal-arc welding tipping according to claim 2 is put, it is characterized in that: in the said service band, the current value of crest segment II t5 is no less than 100A, and the duration when crest segment II t5 exports through secondary rectification module (4) back is 20 ~ 100ms; The current value of stage casing t6 is 20 ~ 80A, and the duration when stage casing t6 exports through secondary rectification module (4) back is 200 ~ 800ms; The current value of rear t7 is 0A, and the duration when rear t7 exports through secondary rectification module (4) back is 200 ~ 800ms.
8. the welding method that manual metal-arc welding tipping according to claim 7 is put, it is characterized in that: the current value of said crest segment II t5 is 160A.
9. the welding method that manual metal-arc welding tipping according to claim 7 is put, it is characterized in that: the current value of said stage casing t6 is 70A.
10. the welding method that described manual metal-arc welding tipping is put according to the arbitrary claim of claim 2 to 9 is characterized in that: said high-frequency impulse wave frequency is more than 20KHz reaches.
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 |
| JP2015514338A JP2015519203A (en) | 2012-06-01 | 2013-05-22 | Hand arc welding apparatus applying pulse current and welding method thereof |
| PCT/CN2013/076024 WO2013178028A1 (en) | 2012-06-01 | 2013-05-22 | Hand arc welding device applying pulse current and welding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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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 true CN102717170A (en) | 2012-10-10 |
| CN102717170B CN102717170B (en) | 2015-12-09 |
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| CN201210178456.8A Expired - Fee Related 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106180974A (en) * | 2016-08-09 | 2016-12-07 | 上海广为焊接设备有限公司 | Repacking direct-flow argon-arc welder is the device and method of pulse argon arc welding machine |
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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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106180974A (en) * | 2016-08-09 | 2016-12-07 | 上海广为焊接设备有限公司 | Repacking direct-flow argon-arc welder is the device and method of pulse argon arc welding machine |
| 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 |
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