CN102744500B - Gas shielded welding device - Google Patents
Gas shielded welding device Download PDFInfo
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- CN102744500B CN102744500B CN201210247610.2A CN201210247610A CN102744500B CN 102744500 B CN102744500 B CN 102744500B CN 201210247610 A CN201210247610 A CN 201210247610A CN 102744500 B CN102744500 B CN 102744500B
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- 238000003466 welding Methods 0.000 title claims abstract description 109
- 238000012544 monitoring process Methods 0.000 claims abstract description 53
- 239000007789 gas Substances 0.000 claims description 79
- 230000001681 protective effect Effects 0.000 claims description 23
- 230000004907 flux Effects 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention provides a gas shielded welding device which comprises a welding torch, a gas supply pipeline and a wire feeding machine. The gas supply pipeline is used for transmitting gas for the welding torch, and the wire feeding machine is used for providing welding wires to the welding torch. The gas shielded welding device further comprises a gas flow monitoring unit. The gas flow monitoring unit is used for monitoring flow of shielding gas in the gas supply pipeline in real time and controlling start/stop of the wire feeding machine according to flow conditions of the shielding gas. Therefore, the whole welding process can be guaranteed under shielding of plenty of gas, and the welding quality problems of pores, cracks and the like caused by insufficiency or suspension of shielding gas in the prior art are avoided.
Description
Technical field
The invention belongs to welding technology field, be specifically related to a kind of gas-shielded welding device.
Background technology
In the automotive industry, welding is a key link in auto parts and components and Auto-body manufacturing, plays the special role of forming a connecting link.Because the vehicle of automobile product is numerous, shaped structure is complicated, parts specialization in production, standardization and the automobile making composite request in quality, efficiency and cost etc., all determining Automobile Welding processing is multidisciplinary, cross-cutting and Integration ofTechnology is a strong production process.Wherein, the welding quality of body in white directly decides the quality of operation below, and the welding quality of body in white is bad, not only affects car load outward appearance, also can cause leaking, wind makes an uproar, make an uproar in road and the generation of the situation such as closing of the door obstacle.
In the manufacture of auto parts and components and body in white, main welding method has resistance spot welding, CO
2gas shielded arc welding and Laser Welding etc.Wherein, CO
2gas shielded arc welding is a kind of with CO
2gas makes protective gas; the electric arc between welding wire and weldment is relied on to carry out the welding method of molten solder metal (i.e. welding wire); the feature such as it is large with depositedization amount of metal as the efficient welding method of one, production efficiency is high, steady quality, welding deformation are little and welding cost is low, obtains at Automobile Industry in China and uses widely.
As shown in Figure 1, existing CO
2gas shielded welding machine comprises central gas supply termination rack, welding gun, supply air line 5 and wire-feed motor.Be furnished with flow in described central gas supply termination rack and take into account valve, open valve during use and adjust flux meter to obtain the CO of certain flow
2gas, described supply air line 5 is arranged between central gas supply termination rack and welding gun, for by the CO in central gas supply termination rack
2gas is delivered to welding gun, and described wire-feed motor is used for providing welding wire to welding gun place, and described welding gun is used at CO
2under gaseous environment protection, form loop by welding wire, plate earth connection, after welding machine main power source triggers, welding wire is heated to molten state to weld weld zone place by the electric current produced in loop.
In actual welding operating process, when because of the CO in central gas supply termination rack
2gas flow is not enough or cause the CO in supply air line because of supply air line fault
2gas flow is not enough or (this kind of situation operating personnel occur usually not easily find immediately) when interrupting, if operating personnel are still at continuation operation welding gun, thus the liquid metal bath (being namely positioned at the welding wire melted at weld zone place and the weldment mother metal of partial melting) after making welding melt directly contacts with surrounding air, a large amount of oxygen and nitrogen will be dissolved in molten bath, after the content of above-mentioned gas exceedes certain value, the mechanical property of weld zone place metal not only can be made to be deteriorated, weld zone place metal also can be caused when solidifying to produce a large amount of pore, the defects such as crackle, have a strong impact on the quality of body in white, and the practical solution do not solved the problem in prior art.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned defect existing in prior art, provides a kind of gas-shielded welding device that can ensure all to carry out under enough gas shields in the whole process of welding.
The technical scheme that solution the technology of the present invention problem adopts is:
Described gas-shielded welding device comprises welding gun, supply air line and wire-feed motor; described supply air line is used for welding gun conveying protective gas; described wire-feed motor is used for providing welding wire to welding gun place; wherein; described gas-shielded welding device also comprises gas flow monitoring unit; described gas flow monitoring unit is used for the flow of the protective gas in supply air line described in Real-Time Monitoring, and controls opening/stopping of described wire-feed motor according to the traffic conditions of described protective gas.
Preferably, described gas flow monitoring unit comprises flow acquiring unit, control unit and performance element, is provided with flux lower limit value in described control unit,
Described flow acquiring unit is used for the flow value of the protective gas in Real-time Obtaining supply air line, and exports this flow value signal to control unit;
Described control unit is used for described flow value and the flux lower limit value preset in it to compare, and controls signal to performance element according to comparative result transmission is different;
The control signal that described performance element is used for sending according to control unit controls opening/stopping of described wire-feed motor.
Further preferably, described wire-feed motor comprises motor;
Described flow acquiring unit comprises flow monitoring sensor, and described flow monitoring sensor setting, on supply air line, for the flow value of protective gas in Real-Time Monitoring supply air line, and exports this flow value signal to control unit;
Described control unit is used for the flow value of flow monitoring sensor output and flux lower limit value default in it to compare, and send according to comparative result and different control signal to performance element: if described flow value is greater than described flux lower limit value, then send enabling signal to performance element; If described flow value is less than or equal to described flux lower limit value, then send stop signal to performance element;
Described performance element comprises the normally opened contact of described flow monitoring sensor, described normally opened contact to be serially connected in described wire-feed motor between motor place circuit and current supply circuit, this normally opened contact can close according to the enabling signal of control unit transmission thus connect motor place circuit and current supply circuit in wire-feed motor, to start described wire-feed motor, with the connection that can disconnect motor place circuit and current supply circuit in wire-feed motor according to the stop signal of control unit transmission, to stop the work of described wire-feed motor.
Preferably; described gas-shielded welding device also comprises delay unit; described delay unit is connected with the performance element in gas flow monitoring unit, for receive control unit at performance element enabling signal after, make described performance element control described wire-feed motor delayed startup.
Further preferably, described start-up time delay is 0.3s ~ 0.6s.
Preferably, described test cell comprises manual wire feed switch, described manual wire feed switch adopts double contact switch, wherein pair of contact switch is for controlling opening/stopping of motor in described wire-feed motor, it is in parallel with the normally opened contact of flow monitoring sensor with between current supply circuit that another to be serially connected in described wire-feed motor motor place circuit to contact switch, with by the described on/off that another controls in wire-feed motor between motor place circuit and current supply circuit to the ON/OFF of contact switch.
Preferably, described gas-shielded welding device also comprises torch handle switch and supply air line on-off switch;
Described torch handle switch for controlling opening/stopping of described welding gun, and for controlling opening/stopping of motor in described wire-feed motor;
Described supply air line on-off switch is used for the on/off controlling supply air line according to the ON/OFF of described torch handle switch;
Described supply air line on-off switch comprises magnetic valve and relay; Described magnetic valve is arranged on described supply air line, for conducting or close described supply air line; The normally opened contact of described relay is connected with electromagnetic valve coil; Described relay is connected with torch handle switch, make described relay normally opened contact can according to the ON/OFF of torch handle switch opening/closing, thus the be energized action/power-off of described electromagnetic valve coil is stopped, and then can magnetic valve on opening/closing supply air line.
Preferably, described gas-shielded welding device also comprises air valve insurance, and it is connected between electromagnetic valve coil and current supply circuit; Described wire-feed motor also comprises current-limiting resistance and motor insurance, and described current-limiting resistance and motor insurance to be all connected in described wire-feed motor between motor and current supply circuit.
Preferably, described protective gas adopts CO
2gas, argon gas or CO
2the mist of gas and argon gas.
Beneficial effect:
1) gas-shielded welding device of the present invention can the uninterrupted of gas in Real-Time Monitoring supply air line, when gas flow is not enough or interrupt (namely lower than the lower limit of setting), cut off the power supply of motor in wire-feed motor, weld to stop wire feed, thus ensure that the quality of welding, the mechanical property of the metal of weld zone such as can not be made to be deteriorated, also to there will not be weld zone metal to produce the phenomenons such as a large amount of pore, crackle when solidifying;
2) gas-shielded welding device of the present invention compared with prior art only need increase the real-time monitoring and control that gas flow monitoring unit just can realize protective gas, has the advantages such as structure is simple, easy to connect, practical reliably, maintenance cost is low.
Accompanying drawing explanation
Fig. 1 is CO in prior art
2the structural representation of gas shielded welding machine;
The structural representation of gas-shielded welding device in Fig. 2 embodiment of the present invention 1;
Fig. 3 is the circuit connection diagram of gas-shielded welding device in the embodiment of the present invention 1.
In figure: 1-magnetic valve; 1 '-electromagnetic valve coil; 2-flow monitoring sensor; The normally opened contact of 2'-flow monitoring sensor; 3-current-limiting resistance; 4-motor; 5-supply air line; 6-motor insures; The manual wire feed switch of 7-; 8-torch handle switch; The normally opened contact of 9-relay; 10-air valve insures.
Detailed description of the invention
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, gas-shielded welding device of the present invention is described in further detail.
Described gas-shielded welding device comprises welding gun, supply air line and wire-feed motor; described supply air line is used for welding gun conveying protective gas; described wire-feed motor is used for providing welding wire to welding gun place; wherein; described gas-shielded welding device also comprises gas flow monitoring unit; described gas flow monitoring unit is used for the flow of the protective gas in supply air line described in Real-Time Monitoring, and controls opening/stopping of described wire-feed motor according to the traffic conditions of described protective gas.
Embodiment 1:
Protective gas in gas-shielded welding device described in the present embodiment adopts CO
2gas, argon gas or CO
2the mist of gas and argon gas.
As shown in Figure 2; described gas-shielded welding device comprises central gas supply termination rack, welding gun, supply air line 5, wire-feed motor and gas flow monitoring unit; also namely compared with prior art; the present embodiment merely add gas flow monitoring unit, does not change structure or the function of miscellaneous part in existing gas-shielded welding device.
Wherein, described central gas supply termination rack is used for accommodating protective gas; Described supply air line 5 is arranged between central gas supply termination rack and welding gun, for the protective gas in central gas supply termination rack is delivered to welding gun; Described wire-feed motor is used for providing welding wire to welding gun place; Described gas flow monitoring unit is used for the flow of the protective gas in supply air line described in Real-Time Monitoring, and controls opening/stopping of described wire-feed motor according to the traffic conditions of described protective gas.
In the present embodiment, described gas flow monitoring unit comprises flow acquiring unit, control unit and performance element.Be provided with flux lower limit value in described control unit, this flux lower limit value can according to actual conditions setting during welding.
Described flow acquiring unit is used for the flow value of the protective gas in Real-time Obtaining supply air line 5, and exports this flow value signal to control unit; Described control unit is used for described flow value and the flux lower limit value preset in it to compare, and controls signal to performance element according to comparative result transmission is different; The control signal that described performance element is used for sending according to control unit controls opening/stopping of described wire-feed motor.Described wire-feed motor comprises motor 4, its for carry welding wire and control welding wire conveying direction and speed.
As shown in Figure 3, described flow acquiring unit comprises flow monitoring sensor 2, and described flow monitoring sensor 2 is arranged on supply air line 5, for the flow value of protective gas in Real-Time Monitoring supply air line 5, and exports this flow value signal to control unit.
Described control unit (not shown) compares for the flow value exported by flow monitoring sensor 2 and the flux lower limit value preset in it, and send according to comparative result and different control signal to performance element: if described flow value is greater than described flux lower limit value, then send enabling signal to performance element; If described flow value is less than or equal to described flux lower limit value, then send stop signal to performance element.
Described performance element (not shown) comprises the normally opened contact 2' of described flow monitoring sensor, described normally opened contact to be serially connected in described wire-feed motor between motor 4 place circuit and current supply circuit, this normally opened contact can close according to the enabling signal of control unit transmission thus connect motor 4 place circuit and current supply circuit in wire-feed motor, to start described wire-feed motor, with the connection that can disconnect motor 4 place circuit and current supply circuit in wire-feed motor according to the stop signal of control unit transmission, to stop the work of described wire-feed motor.
In the present embodiment; described gas-shielded welding device also comprises delay unit (not shown); it is connected with the performance element in gas flow monitoring unit; for receive control unit at performance element enabling signal after; start after making described performance element control described wire-feed motor time delay a period of time, to ensure that the whole process of welding all is carried out under the protection of enough protective gas further.Preferred described start-up time delay is 0.3s ~ 0.6s.Described delay unit can adopt existing delayer.
Can, in the present embodiment, described gas-shielded welding device also comprises test cell (not shown), normally open/stop for testing described motor 4 and running.Described test cell can adopt existing test component.
Wherein, described test module comprises manual wire feed switch 7, described manual wire feed switch 7 adopts double contact switch, wherein pair of contact switch is for controlling opening/stopping of motor 4 in described wire-feed motor, it is in parallel with the normally opened contact 2' of flow monitoring sensor with between current supply circuit that another to be serially connected in described wire-feed motor motor 4 place circuit to contact switch, with by the described on/off that another controls in wire-feed motor between motor 4 place circuit and current supply circuit to the ON/OFF of contact switch.That is when can described pair of contact switch normally open/the stopping time at the described motor 4 of test, described another is used for guaranteeing to be in ON/OFF state between described motor 4 place circuit and current supply circuit to contact switch.
In the present embodiment, described gas-shielded welding device also comprises torch handle switch 8 and supply air line on-off switch.Described torch handle switch 8 for controlling opening/stopping of described welding gun, and for controlling opening/stopping of motor 4 in described wire-feed motor; Described supply air line on-off switch is used for the on/off controlling supply air line according to the ON/OFF of described torch handle switch 8.As shown in Figure 3, described supply air line on-off switch comprises magnetic valve 1 and relay (not shown); Described magnetic valve 1 is arranged on described supply air line 5, for conducting or close described supply air line 5; The normally opened contact 9 of described relay is connected with electromagnetic valve coil 1'; Described relay is connected with torch handle switch 8, make described relay normally opened contact 9 can according to the ON/OFF of torch handle switch 8 opening/closing, thus be energized action/power-off of described electromagnetic valve coil 1' is stopped, and then can magnetic valve 1 on opening/closing supply air line 5.
Preferred described gas-shielded welding device also comprises air valve insurance 10, and it is connected between electromagnetic valve coil 1' and current supply circuit, for the short-circuit protection in electromagnetic valve coil loop.Described wire-feed motor also comprises current-limiting resistance 3 and motor insurance 6, and described current-limiting resistance 3 and motor insurance 6 to be all connected in described wire-feed motor between motor 4 and current supply circuit.Described current-limiting resistance 3 to be reduced by the electric current of described motor 4, ensures that motor 4 can normally work for dividing potential drop; Described motor insurance 6 for the disconnection motor 4 place circuit when circuit overload to protect described motor 4.
The operation principle of gas-shielded welding device described in the present embodiment is described in detail below in conjunction with Fig. 3:
During welding, first torch handle switch 8 is pressed, close with the normally opened contact 9 of control relay, make electromagnetic valve coil 1' energising action and open magnetic valve 1, protective gas accommodating in central gas supply termination rack flows to welding gun through supply air line 5, gas flow in flow monitoring sensor 2 Real-Time Monitoring supply air line 5 also exports this flow value signal to control unit, the flow value that flow monitoring sensor 2 exports by control unit and the flux lower limit value preset in it compare, if described flow value is greater than described flux lower limit value, then send enabling signal to performance element, described performance element controls the flow monitoring sensor in it normally opened contact 2' after receiving described enabling signal closes thus connects motor place circuit and current supply circuit in wire-feed motor, under the effect of delay unit, start (enabling signal of described motor 4 is sent by torch handle switch 8) after motor 4 time delay a period of time in described wire-feed motor and provide welding wire to welding gun, once described flow value is less than or equal to described flux lower limit value, then control unit sends stop signal to performance element, described performance element controls the flow monitoring sensor in it normally opened contact 2' after receiving described stop signal disconnects thus disconnects the connection of motor place circuit and current supply circuit in wire-feed motor, to stop the work of described wire-feed motor, namely stop providing welding wire to welding gun.
Visible, gas-shielded welding device described in the present embodiment can ensure all to carry out under enough gas shields in whole welding process, thus ensure that welding quality.
It should be noted that, the sensor of flow monitoring described in the present embodiment 2, current-limiting resistance 3, motor insurance 6, magnetic valve 1, relay and air valve insurance 10 design parameter or model can be chosen voluntarily according to the actual requirements by those skilled in the art, repeat no more here.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is: described wire-feed motor does not comprise delay unit, and the performance element in described gas flow monitoring unit starts described wire-feed motor after receiving the enabling signal of control unit transmission immediately.
Other structures in the present embodiment, annexation and effect are all identical with embodiment 1, repeat no more here.
Gas flow monitoring unit is adopted also to can be applicable to the gas of other kinds or the Real-Time Monitoring of fluid to the principle that gas flow carries out Real-Time Monitoring in gas-shielded welding device of the present invention.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (6)
1. a gas-shielded welding device, comprise welding gun, supply air line and wire-feed motor, described supply air line is used for welding gun conveying protective gas, described wire-feed motor is used for providing welding wire to welding gun place, it is characterized in that, described gas-shielded welding device also comprises gas flow monitoring unit, and described gas flow monitoring unit comprises flow acquiring unit, control unit and performance element, be provided with flux lower limit value in described control unit, described wire-feed motor comprises motor;
Described flow acquiring unit comprises flow monitoring sensor, and described flow monitoring sensor setting, on supply air line, for the flow value of protective gas in Real-Time Monitoring supply air line, and exports this flow value signal to control unit;
Described control unit is used for the flow value of flow monitoring sensor output and flux lower limit value default in it to compare, and send according to comparative result and different control signal to performance element: if described flow value is greater than described flux lower limit value, then send enabling signal to performance element; If described flow value is less than or equal to described flux lower limit value, then send stop signal to performance element;
Described performance element comprises the normally opened contact of described flow monitoring sensor, described normally opened contact to be serially connected in described wire-feed motor between motor place circuit and current supply circuit, this normally opened contact can close according to the enabling signal of control unit transmission thus connect motor place circuit and current supply circuit in wire-feed motor, to start described wire-feed motor, with the connection that can disconnect motor place circuit and current supply circuit in wire-feed motor according to the stop signal of control unit transmission, to stop the work of described wire-feed motor;
Described gas-shielded welding device also comprises delay unit, described delay unit is connected with the performance element in gas flow monitoring unit, for receive control unit at performance element enabling signal after, make described performance element control described wire-feed motor delayed startup;
Described gas-shielded welding device also comprises torch handle switch and supply air line on-off switch;
Described torch handle switch for controlling opening/stopping of described welding gun, and for controlling opening/stopping of motor in described wire-feed motor;
Described supply air line on-off switch is used for the on/off controlling supply air line according to the ON/OFF of described torch handle switch;
Described supply air line on-off switch comprises magnetic valve and relay; Described magnetic valve is arranged on described supply air line, for conducting/close described supply air line; The normally opened contact of described relay is connected with electromagnetic valve coil; Described relay is connected with torch handle switch, with make described relay normally opened contact can according to the ON/OFF of torch handle switch opening/closing, thus the be energized action/power-off of described electromagnetic valve coil is stopped, and then can magnetic valve on opening/closing supply air line.
2. gas-shielded welding device according to claim 1, is characterized in that, described start-up time delay is 0.3s ~ 0.6s.
3. gas-shielded welding device according to claim 1 and 2, is characterized in that, described gas-shielded welding device also comprises test cell, and can it normally open/stop for testing motor in described wire-feed motor and running.
4. gas-shielded welding device according to claim 3; it is characterized in that; described test cell comprises manual wire feed switch; described manual wire feed switch adopts double contact switch; wherein pair of contact switch is for controlling opening/stopping of motor in described wire-feed motor; it is in parallel with the normally opened contact of flow monitoring sensor with between current supply circuit that another to be serially connected in described wire-feed motor motor place circuit to contact switch, with by the described on/off that another controls in wire-feed motor between motor place circuit and current supply circuit to the ON/OFF of contact switch.
5. gas-shielded welding device according to claim 1, is characterized in that, described gas-shielded welding device also comprises air valve insurance, and it is connected between electromagnetic valve coil and current supply circuit; Described wire-feed motor also comprises current-limiting resistance and motor insurance, and described current-limiting resistance and motor insurance to be all connected in described wire-feed motor between motor and current supply circuit.
6. gas-shielded welding device according to claim 1 and 2, is characterized in that, described protective gas adopts CO
2gas, argon gas or CO
2the mist of gas and argon gas.
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| CN201210247610.2A CN102744500B (en) | 2012-07-17 | 2012-07-17 | Gas shielded welding device |
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| CN201210247610.2A CN102744500B (en) | 2012-07-17 | 2012-07-17 | Gas shielded welding device |
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| CN104249211B (en) * | 2013-06-26 | 2016-06-08 | 北汽福田汽车股份有限公司 | The carbon-dioxide arc welding method of automobile appearance part |
| CN104416256B (en) * | 2013-08-23 | 2016-09-07 | 珠海格力电器股份有限公司 | Soldering nitrogen charging intelligent monitoring device |
| CN104907660B (en) * | 2015-06-26 | 2017-03-01 | 江苏大学 | The high frequency brazing machine of a kind of application motor based on PLC and touch screen and its control method |
| CN105081529A (en) * | 2015-07-21 | 2015-11-25 | 中国船舶重工集团公司第七二五研究所 | Welding protective gas high-frequency mixing system |
| CN110405383A (en) * | 2019-06-25 | 2019-11-05 | 上海展湾信息科技有限公司 | Weld blowhole real-time detection method and system for robot welding technique |
| CN110142488A (en) * | 2019-07-02 | 2019-08-20 | 姜佰佐 | Argon arc welding gas supply control circuit |
| CN111014894A (en) * | 2019-11-15 | 2020-04-17 | 华域汽车车身零件（上海）有限公司 | Water-gas detection control system |
| US11685004B2 (en) * | 2020-03-13 | 2023-06-27 | Illinois Tool Works Inc. | Systems and methods to detect faults in wire feed motor drive circuits |
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| CN101855039A (en) * | 2007-09-03 | 2010-10-06 | 威尔特克公司 | Shielding gas flow controller for a welding apparatus |
| CN102189315B (en) * | 2010-03-15 | 2014-12-17 | 株式会社大亨 | Arc welding device |
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| CN102744500A (en) | 2012-10-24 |
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