CN104014911B - The device for controlling dynamically of gas shielded arc welding and control method - Google Patents
The device for controlling dynamically of gas shielded arc welding and control method Download PDFInfo
- Publication number
- CN104014911B CN104014911B CN201410244296.1A CN201410244296A CN104014911B CN 104014911 B CN104014911 B CN 104014911B CN 201410244296 A CN201410244296 A CN 201410244296A CN 104014911 B CN104014911 B CN 104014911B
- Authority
- CN
- China
- Prior art keywords
- gas
- protective gas
- welding
- air inlet
- electromagnetic
- 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.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims abstract description 59
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 10
- 239000010937 tungsten Substances 0.000 claims abstract description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000010349 pulsation Effects 0.000 claims abstract description 5
- 230000000630 rising effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 7
- 238000007493 shaping process Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 102
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 20
- 239000001307 helium Substances 0.000 description 13
- 229910052734 helium Inorganic materials 0.000 description 13
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 13
- 229910052786 argon Inorganic materials 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 230000004927 fusion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- 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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to the device for controlling dynamically of gas shielded arc welding; it comprises electromagnetic gas valve (1), controller (2) and welding gun body (3); electromagnetic gas valve (1) is provided with the first air inlet (4), the second air inlet (5) and gas outlet (6); controller (2) is connected with the signal end of electromagnetic gas valve (1); protective gas cavity (8) is provided with between tungsten electrode (7) and welding gun body (3); be communicated with by protective gas carrier pipe (9) between gas outlet (6) with protective gas cavity (8), controller (2) is connected with welding gun body (3).Its control method is: by controller setpoint frequency or according to pulsed current signal; realize the cyclically-varying of heterogeneity protective gas or the pulsation way of output of same composition protective gas different flow, obtain the regulation and control to each gas flow and proportioning duration in welding process.The invention has the advantages that: easy to operate, gas flow optimized is accurate, effectively improves shaping and the quality of welding.
Description
Technical field
The present invention relates to device for controlling dynamically and the control method of gas shielded arc welding technical field of welding equipment, particularly gas shielded arc welding.
Background technology
During last century the forties to the sixties; the technology and devices such as gas tungsten arc welding, gas metal-arc welding, the pulse current source of welding current are continuous mutually to come out; the forming quality of metal material melting welding is significantly improved, and has been widely used in the industry since over half a century thereafter.But the means of distribution for protective gas is the parameter as a non-time-varying in welding process, wherein always; gas componant can be single, also can be binary or Diversity, but; when the component of protective gas and flow thereof are once setting, just remain unchanged in welding process.
In recent years, along with the continuous appearance of various Materials with High Strength (comprising aluminium alloy, high-strength steel, super-high strength steel etc.) and through engineering approaches are applied, new demand is proposed to welding procedure: (1), for guaranteeing the combination property of welding point, must control welding process heat input; (2) in the welding of vitals or structural member, require that the essence amount of back of weld penetration and shaping thereof controls; (3) not only require the forming quality controlling weld seam, and require the structural state controlling weld seam, reduce or eliminate metallurgical degradation.In welding production in the past, all adopt the pulsation of impulse current system, packing material to send mode or hybrid protection gas etc. to and make the shaping of welding point and performance be controlled or improve.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of convenient operation and control is provided, is quick on the draw, improve the gas-dynamic control device of the gas shielded arc welding of welding quality.
Object of the present invention is achieved through the following technical solutions: the device for controlling dynamically of gas shielded arc welding; it comprises electromagnetic gas valve, controller and welding gun body; electromagnetic gas valve is provided with the first air inlet, the second air inlet and gas outlet; controller is connected with the signal end of electromagnetic gas valve; welding gun body interior is provided with tungsten electrode; protective gas cavity is also provided with between tungsten electrode and welding gun body; be communicated with by protective gas carrier pipe between gas outlet with protective gas cavity, controller is connected with the signal end of welding gun body.
Described electromagnetic gas valve is two-bit triplet or the high speed electromagnetic air valve adopting two 2/2-ways.
The first described air inlet is connected with outside protective gas A source of the gas, and the second described air inlet is connected with outside protective gas B source of the gas.
When using two kinds of different Shielding gas, welding current is base value, protective gas A enters protective gas cavity from the first air inlet, controller obtains the pulse current rising edge signal that the source of welding current exports, trigger electromagnetic gas valve, electromagnetic gas valve switches, protective gas B enters protective gas cavity from the second air inlet, after protective gas B air feed certain hour, controller obtains the pulse current trailing edge signal triggering electromagnetic gas valve that the source of welding current exports, protective gas B is transformed to protective gas A, protective gas A enters protective gas cavity by the first air inlet again, realize the switching of protective gas component,
When using pure gas welding; obtain the pulse current rising edge of source of welding current output or the signal of trailing edge by controller equally; trigger electromagnetic gas valve; thus increase or reduce to use respectively the flow of the protective gas A of two flow meter settings, make the flow of protective gas A be that periodically variable pulsation exports.
When welding current is direct current, then by the switching frequency of controller sets itself to electromagnetic gas valve, described electromagnetic gas valve setting duration continuously adjustabe in the scope of 30ms ~ 1000ms, and the switching action time is within 10ms.
The flow of the first described air inlet, the second air inlet and gas outlet is not less than 10L/min.
Described electromagnetic gas valve setting duration continuously adjustabe in the scope of 30ms ~ 1000ms, and the switching action time is within 10ms.
The present invention has the following advantages:
1, controller can automatically with welding current pulse matching, namely select rising edge or trailing edge, EN or the EP period of interchange switch component or the flow of gas, operate control very convenient, react sensitiveer.
2, fusion penetration increase, back-welding shape are greatly improved; Reduce and eliminate the metallurgical imperfections such as pore, refinement seam organization; Fall low_input_power, the property of welded joint being particularly advantageous in Materials with High Strength promotes; Lower and improve the stress state of joint; Arc stability improves, and contributes to eliminating arc blow when multi-pass welding; Not easily form the surface shortcomings such as undercut.
3, by flow and the component of protective gas in dynamic assignment welding process; the ionization condition of regulation and control electric arc and thermodynamic state; optimize in " field of force " and " temperature field " of welding arc; optimize the mode of metal transfer that consumable electrode gas protects weldering, thus reach the effect of optimize welding line shaping and joint performance.
Accompanying drawing explanation
Fig. 1 is the controlled arc waveform figure added of helium;
Fig. 2 is the argon pulsed arc oscillogram without helium;
Fig. 3 is the arc waveform figure of the effect of pulse of helium under DC condition;
Fig. 4 is structural representation of the present invention;
In figure: 1-electromagnetic gas valve, 2-controller, 3-welding gun body, 4-first air inlet, 5-second air inlet, 6-gas outlet, 7-tungsten electrode, 8-protective gas cavity, 9-protective gas carrier pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 4; the device for controlling dynamically of gas shielded arc welding; it comprises electromagnetic gas valve 1, controller 2 and welding gun body 3; electromagnetic gas valve 1 is provided with the first air inlet 4, second air inlet 5 and gas outlet 6; controller 2 is connected with the signal end of electromagnetic gas valve 1; welding gun body 3 inside is provided with tungsten electrode 7; protective gas cavity 8 is also provided with between tungsten electrode 7 and welding gun body 3; be communicated with by protective gas carrier pipe 9 between gas outlet 6 with protective gas cavity 8, controller 2 is connected with the signal end of welding gun body 3.
Described electromagnetic gas valve 1 is two-bit triplet or the high speed electromagnetic air valve adopting two 2/2-ways.
The first described air inlet 4 is connected with outside argon gas source of the gas, and the second described air inlet 5 is connected with outside helium source of the gas.
Adopt argon gas and helium alternately to supply gas as protective gas, to molten bath, there is periodic shock effect.Under same current condition, the energy density due to helium electric arc is 3.5 times of argon electric arc, is conducive to the increase of fusion penetration when helium effect; The consistent of the stable of electric arc and back-welding shape is then conducive to when ar gas acting.
The control method of the device for controlling dynamically of gas shielded arc welding, for GTAW gas tungsten arc welding process, when the Shielding gas that use two kinds is different, welding current is base value, argon gas enters protective gas cavity 8 from the first air inlet 4, controller 2 controls to produce pulse current, the rising edge of pulse current triggers electromagnetic gas valve 1, electromagnetic gas valve 1 switches, helium enters protective gas cavity 8 from the second air inlet 5, after helium air feed certain hour, the trailing edge of pulse current triggers electromagnetic gas valve 1, helium is transformed to argon gas, argon gas enters protective gas cavity 8 by the first air inlet 4 again, realize the switching of protective gas component, its alternating frequency is according to speed of welding, the setting after test of current pulse frequency and penetration degree,
When using pure gas welding; welding current is base value; protective gas A enters protective gas cavity 8 from the first air inlet 4; controller 2 controls to produce pulse current; the rising edge of pulse current triggers electromagnetic gas valve 1, increases or reduce the flow of protective gas A, and the trailing edge of pulse current triggers electromagnetic gas valve 1; protective gas A flow is back to initial value, and the flow of protective gas A is that periodically variable pulsation exports.
The first described air inlet 4, second air inlet 5 and the flow of gas outlet 6 are not less than 10L/min.
Described electromagnetic gas valve 1 sets duration continuously adjustabe in the scope of 30ms ~ 1000ms, and the switching action time is within 10ms.
As depicted in figs. 1 and 2, when the air valve of the rising edge trigger protection gas of pulse current, argon gas when protective gas is base value by electric current is transformed to helium, and the service life of helium is an adjustable technological parameter, according to the requirement setting of appearance of weld or fusion penetration.In figure, after the action delay of visible about 6 milliseconds, gas switches to helium, now arc voltage is uprushed, about 15 volts from former peak impulse voltage rise to about 25 volts, on time and intensity, all essence controlled additional-energy can be measured for electric arc provides one, protective gas composition transfer method can be adopted to regulate and control arc energy on the one hand, thus be conducive to the control of butt welded seam shaping; Solve on the other hand the difficult point in the engineering constructions such as the precision prescribed that traditional heliarc welding process keeps arc length is high, arc stability is poor.As shown in Figure 3, the voltage of former argon arc is about 13 volts, when the voltage changing the heliarc period into can reach 20 volts.
In addition, as apparatus of the present invention be used for gas metal-arc welding (GMAW) time, drip transition when argon gas makes protective gas for thin; Be short circuiting transfer when CO2 makes protective gas, under the arc force effect of alternately change, produce refinement seam organization, the effect of adjustment weld pool surface tension force, elimination undercut.
Claims (5)
1. the device for controlling dynamically of gas shielded arc welding, it is characterized in that: it comprises electromagnetic gas valve (1), controller (2) and welding gun body (3), electromagnetic gas valve (1) is provided with the first air inlet (4), second air inlet (5) and gas outlet (6), controller (2) is connected with the signal end of electromagnetic gas valve (1), welding gun body (3) inside is provided with tungsten electrode (7), protective gas cavity (8) is also provided with between tungsten electrode (7) and welding gun body (3), be communicated with by protective gas carrier pipe (9) between gas outlet (6) with protective gas cavity (8), controller (2) is connected with the signal end of welding gun body (3),
The control method of the device for controlling dynamically of described gas shielded arc welding, comprises the following steps:
When the Shielding gas that use two kinds is different, welding current is base value, protective gas A enters protective gas cavity (8) from the first air inlet (4), controller (2) obtains the pulse current rising edge signal that the source of welding current exports, trigger electromagnetic gas valve (1), electromagnetic gas valve (1) switches, protective gas B enters protective gas cavity (8) from the second air inlet (5), after protective gas B air feed certain hour, controller (2) obtains pulse current trailing edge signal triggering electromagnetic gas valve (1) that the source of welding current exports, protective gas B is transformed to protective gas A, protective gas A enters protective gas cavity (8) by the first air inlet (4) again, realize the switching of protective gas component,
When using pure gas welding; obtain the pulse current rising edge of source of welding current output or the signal of trailing edge by controller (2) equally; trigger electromagnetic gas valve (1); thus increase or reduce to use respectively the flow of the protective gas A of two flow meter settings, make the flow of protective gas A be that periodically variable pulsation exports.
2. the device for controlling dynamically of gas shielded arc welding according to claim 1, is characterized in that: the high speed electromagnetic air valve that described electromagnetic gas valve (1) is two-bit triplet.
3. the device for controlling dynamically of gas shielded arc welding according to claim 1; it is characterized in that: described the first air inlet (4) is connected with outside the first protective gas A source of the gas, described the second air inlet (5) is connected with outside the second protective gas B source of the gas.
4. the device for controlling dynamically of gas shielded arc welding according to claim 1; it is characterized in that: when welding current is direct current; then by the switching frequency of controller sets itself to electromagnetic gas valve; described electromagnetic gas valve (1) setting duration continuously adjustabe in the scope of 30ms ~ 1000ms, and the switching action time is within 10ms.
5. the device for controlling dynamically of gas shielded arc welding according to claim 1, is characterized in that: the flow of described the first air inlet (4), the second air inlet (5) and gas outlet (6) is not less than 10L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244296.1A CN104014911B (en) | 2014-06-05 | 2014-06-05 | The device for controlling dynamically of gas shielded arc welding and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244296.1A CN104014911B (en) | 2014-06-05 | 2014-06-05 | The device for controlling dynamically of gas shielded arc welding and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104014911A CN104014911A (en) | 2014-09-03 |
| CN104014911B true CN104014911B (en) | 2016-01-20 |
Family
ID=51432065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410244296.1A Expired - Fee Related CN104014911B (en) | 2014-06-05 | 2014-06-05 | The device for controlling dynamically of gas shielded arc welding and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104014911B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368897B (en) * | 2014-10-22 | 2017-05-03 | 江苏科技大学 | Gas protection automatic welding control device |
| CN104858538B (en) * | 2015-05-03 | 2016-11-09 | 北京工业大学 | Airflow waveform modulation variable-polarity plasma welding method |
| CN105290586B (en) * | 2015-11-09 | 2017-09-05 | 山东宇能机械有限公司 | A kind of plasma cutting gun electricity, gas separating device |
| CN111408828A (en) * | 2020-04-16 | 2020-07-14 | 广州市瑞欧智能设备有限公司 | Gas saving device and using method thereof |
| CN114769856B (en) * | 2022-05-20 | 2023-08-11 | 重庆理工大学 | Automatic control method for laser welding shielding gas based on electromagnetic valve group |
| CN116713560B (en) * | 2023-08-10 | 2023-10-20 | 中建安装集团西安建设投资有限公司 | Nondestructive testing control welding method based on digital model |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471742A (en) * | 1977-11-18 | 1979-06-08 | Matsushita Electric Ind Co Ltd | Tig arc welding equipment |
| DD298608A5 (en) * | 1989-12-13 | 1992-03-05 | Technische Hochschule Wismar,De | DEVICE FOR PROTECTING GAS FOR WELDING |
| JPH106009A (en) * | 1996-06-19 | 1998-01-13 | Komatsu Ltd | Shield gas welding apparatus used in common for heating device |
| CN2623398Y (en) * | 2003-06-27 | 2004-07-07 | 沈阳工业学院 | Melting pole oxidizability gas proportioning equipment for welding |
| CN101422839A (en) * | 2007-10-30 | 2009-05-06 | 通用汽车环球科技运作公司 | Welding stability system and method |
| CN203853663U (en) * | 2014-06-05 | 2014-10-01 | 成都融合电气有限公司 | Dynamic control device for gas shielded welding |
-
2014
- 2014-06-05 CN CN201410244296.1A patent/CN104014911B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471742A (en) * | 1977-11-18 | 1979-06-08 | Matsushita Electric Ind Co Ltd | Tig arc welding equipment |
| DD298608A5 (en) * | 1989-12-13 | 1992-03-05 | Technische Hochschule Wismar,De | DEVICE FOR PROTECTING GAS FOR WELDING |
| JPH106009A (en) * | 1996-06-19 | 1998-01-13 | Komatsu Ltd | Shield gas welding apparatus used in common for heating device |
| CN2623398Y (en) * | 2003-06-27 | 2004-07-07 | 沈阳工业学院 | Melting pole oxidizability gas proportioning equipment for welding |
| CN101422839A (en) * | 2007-10-30 | 2009-05-06 | 通用汽车环球科技运作公司 | Welding stability system and method |
| CN203853663U (en) * | 2014-06-05 | 2014-10-01 | 成都融合电气有限公司 | Dynamic control device for gas shielded welding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104014911A (en) | 2014-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104014911B (en) | The device for controlling dynamically of gas shielded arc welding and control method | |
| EP3194103B1 (en) | Electrode negative pulse welding system and method | |
| CN103567652B (en) | Aluminum alloy direct current plasma-tungsten electrode argon arc hybrid welding method based on pulse coordination control | |
| WO2014140748A3 (en) | Variable polarity pulse with constant droplet size | |
| CA2747663C (en) | Double wire gmaw welding torch assembly and process | |
| CN109365965B (en) | Welding molten drop transition control equipment and control method based on superaudio pulse double-tungsten electrode coordination | |
| MX363476B (en) | Method and system to use ac welding waveform and enhanced consumable to improve welding of galvanized workpiece. | |
| CN105934304B (en) | System and method for the output power for controlling the source of welding current | |
| KR20150004119U (en) | A method and system of welding with a power supply having a single welding mode | |
| WO2007126848A3 (en) | Mig welder control system and method | |
| CN104588846A (en) | Method and device for increasing TIG welding electric arc energy density | |
| CN105312741A (en) | TIP TIG welding method of LNG storage tanks | |
| WO2012176057A1 (en) | Welding system with controlled wire feed speed during arc initiation and corresponding method of welding | |
| CN107042351B (en) | A kind of non-consumable gas shielded arc welding welding wire end position determination method | |
| CN203853663U (en) | Dynamic control device for gas shielded welding | |
| CN106735772A (en) | The device and method of the double arc automatic MIG weldering welding of aluminum alloy two-side | |
| CN106624402A (en) | Double heat source hybrid welding torch and welding method | |
| CN101590572A (en) | The vertical double-sided double-arc plasma symmetry welding method | |
| CN204075522U (en) | A kind of plasma/argon arc welding automatic welding system | |
| KR20210102967A (en) | Method for controlling a welding process with a consumable electrode and a welding apparatus having a controller of this type | |
| CN103506748B (en) | Plasma-arc welding system and plasma-arc welding method | |
| CN109483021A (en) | A kind of double tungsten electrode pulse TIG welding methods | |
| CN103302383A (en) | Automatic argon arc welding machine | |
| US3409756A (en) | Metal arc working | |
| CN203292668U (en) | Automatic argon arc welding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 |