CN102581449A - Twin-wire vertical electrogas welding system with low welding heat input and welding method - Google Patents
Twin-wire vertical electrogas welding system with low welding heat input and welding method Download PDFInfo
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Abstract
The invention provides a twin-wire vertical electrogas welding system with low welding heat input and a welding method. The system comprises a first welding power source, a second welding power source, an integrated power source box, a first wire feeder, a second wire feeder, a first gas shielded welding gun, a second gas shielded welding gun, a gas supply device, a control cabinet, an oscillator and a welding tractor, wherein homopolar output ends of the first welding power source and the second welding power source are in conductive connection with a head end of the first gas shielded welding gun, the other output end of the first welding power source is connected with a welded workpiece, and the other output end of the second welding power source is in conductive connection with a head end of the second gas shielded welding gun, so that heat input is greatly reduced while deposition rate can be increased, the system is stable and reliable, and impact toughness of a welding line is remarkably improved. Additionally, a twin-wire welding gun oscillating in the welding line can guarantee sufficient fusion of side walls of the welding line and a welding weld crater, so that mechanical properties of the welding line are remarkably enhanced.
Description
[technical field]
The invention belongs to welding technology field, relate in particular to a kind of mariages vertical electro-gas system of low sweating heat input, and a kind of welding method of mariages vertical electro-gas of low sweating heat input.
[background technology]
Vertical electro-gas method based on the gas metal-arc welding technology is a kind of welded and high efficient method that is very suitable for the heavy duty metal structure; Input is high but the greatest problem that these vertical electro-gas methods exist is exactly sweating heat; And sweating heat input is directly proportional with thickness of slab, so greatly limited range of application; And the heat input raising that brings with the thickness of slab increase can make the crystallization rate of weld metal reduce, and brings crystal grain thick thus, thereby causes the mechanical property of weld seam to reduce, and has had a strong impact on the low-temperature impact toughness of weld seam.Experimental result shows: adopt solid welding wire, thickness of slab surpasses 30mm, and the impact flexibility of weld seam significantly reduces.This just limits the problem place of electro-gas (enclosed) welding in big thick plates welding applications.The unique method that improves this problem at present is exactly the vertical electro-gas flux-cored wire special that adopts the special material component; Through metallurgical approach crystal grain thinning; Yet use this vertical electro-gas flux-cored wire special not only very expensive (price is several times as much as solid welding wire); And this method is from reducing the sweating heat input in essence, so still can receive the restriction of thickness of slab.Therefore, even do not consider the cost problem, the high problem of sweating heat input that solves vertical electro-gas from the welding material aspect also be have circumscribed.This shows, solve the application problem of vertical electro-gas method, just must seek a kind of method that can fundamentally reduce the sweating heat input in big thick plates.
The sweating heat input is to weigh with heat input, i.e. the input of heat on unit length weld seam energy.Expire whole welding line groove (being that the molten bath area equals the weld groove sectional area) because the appearance of weld characteristics of vertical electro-gas are disposable welderings, and control speed of welding with the bath surface rate of climb.When thickness of slab one timing (the weld groove sectional area is certain), if reduce welding current, reduced the input power of welding heat source on the one hand, also reduced the welding wire deposition rate but then, just reduced the bath surface rate of climb, speed of welding also decreases; Otherwise the increase welding current, one side has increased the input power of welding heat source, also increases the welding wire deposition rate but then and increases, and has promptly improved the bath surface rate of climb, and speed of welding also increases.This shows, when the conventional consumable electrode gas protection welding method that uses, because the deposition rate of its welding wire is directly proportional with welding current, so in thickness of slab one timing, the weld heat input of vertical electro-gas and welding current are irrelevant basically; And when thickness of slab increased, because the molten bath area increases, weld heat input must increase.Therefore for vertical electro-gas, the sweating heat input is directly proportional with thickness of slab, and can not regulate the sweating heat input through welding conditions.
In sum, reduce vertical electro-gas heat input just needs a kind of welding method that can low-heat input when improving deposition rate, that is to say a kind of method that can improve unitary current welding wire deposition rate.The method that can improve the welding wire deposition rate of unitary current at present has the dry extension of electrode of increasing, uses the DCEN polarity of electrode and uses methods such as helium or multicomponent gas; But the increase rate of these methods all is very limited; Generally just about 20%; And these methods are using, and for example present vertical electro-gas special welding wire also is will cooperate DCEN to connect method could obtain certain effect.Therefore to fundamentally solve the sweating heat input problem of vertical electro-gas, also must seek a kind of novel welding method that can increase substantially unitary current welding wire deposition rate.
[summary of the invention]
In order to solve the above-mentioned technical problem that exists in the prior art, the invention provides a kind of double wire welding and sweating heat of adopting and import low, that the weld seam mechanical property is high vertical electro-gas system and welding method.
The present invention solves the technical scheme that the prior art problem adopted:
A kind of mariages vertical electro-gas system of low sweating heat input includes first source of welding current, second source of welding current, integrated power supply box, first wire-feed motor, second wire-feed motor, first gas guarantor welding gun, second gas guarantor welding gun, feeder, control cabinet, wig-wag and welding tractor; Wherein, said first source of welding current all is connected with the input of said integrated power supply box with second source of welding current, supplies with the welding job power supply; Said first wire-feed motor, second wire-feed motor and control cabinet all are connected with the output of said integrated power supply box, and said first wire-feed motor is connected with second gas guarantor welding gun with said first gas guarantor welding gun respectively with second wire-feed motor; Said wig-wag is installed on the said welding tractor, and the double-wire welding gun that said first gas is protected welding gun and second gas guarantor welding gun composition is installed on the said wig-wag; Said feeder is protected welding gun with said first gas and is connected, and the input of said integrated power supply box also connects the extranets electricity provides the defeated power supply that helps for said control cabinet; Said control cabinet and said welding tractor and wig-wag are used to accomplish the control that arc is received in the starting the arc;
The homopolarity output of said first source of welding current and second source of welding current is connected through the conducting that said integrated power supply box and said first gas are protected welding gun simultaneously; And said another output of first source of welding current is connected with welded piece, and said another output of second source of welding current is protected the welding gun conducting with second gas and is connected;
Said wig-wag includes and makes said double-wire welding gun along the rotary oscillation head of doing the rectilinear motion cross sliding clock and said double-wire welding gun being swung in the groove gap of vertical electro-gas perpendicular to the direction of weld seam;
Also include cooling water tank and water-cooled slide block; Said cooling water tank is connected with the output of said integrated power supply box; Said water-cooled slide block is connected with said feeder, and said first gas is protected, and welding gun, second gas are protected welding gun, the water-cooled slide block is connected with cooling water tank successively, forms cooling circuit;
Said first source of welding current and second source of welding current are three phase mains; Said integrated power supply box is the communication power supply box; Said welding tractor is a vertical gas electric welding dolly, and said feeder is for being carbon dioxide canister or carbon dioxide and/or argon gas and other protectiveness mist gas tank.
A kind of welding method of mariages vertical electro-gas of low sweating heat input; Comprise first gas is protected the to be welded position of welding gun near welded piece, protect welding gun surface to be welded terminal and welded piece at said first gas and form main arc, and second gas is protected the welding gun end protect the welding gun end near first gas; Between said first gas guarantor welding gun end and second gas guarantor welding gun end, form assistant electric arc; Said main arc and assistant electric arc form composite arc, meanwhile, order about through wig-wag that first gas is protected welding gun and second gas is protected weldering simultaneously along doing rectilinear motion perpendicular to the direction of weld seam; And in the groove gap of vertical electro-gas, swing, realize welding;
Saidly be used to melt said first gas to protect the electric current of welding gun welding wire be I1+I2; Being used to melt said second gas, to protect the electric current of welding gun welding wire be I 2; And the electric current that is used to heat said welded piece is I1, and the total current of filler wire is I1+2 * I2, and the electric current that welded piece produces the available heat input is I1; And said electric current I 1 and I 2 polarity, direction are all identical, and promptly the total current of filler wire is greater than the electric current that welded piece is produced the available heat input;
Said first gas is protected welding gun and second gas and is protected welding arc that welding gun produced and between the water-cooled shaping slide block in the shaping backing plate of back of weld and weld seam front, do rectilinear motion, and between the left plate of the groove of vertical electro-gas and right plate reciprocally swinging.
Of the present invention through technique scheme, can be implemented in when improving the vertical electro-gas deposition rate, also reduce welding process heat input energy greatly; Make the impact flexibility of weld seam significantly promote; Also can greatly reduce the material cost of welding, and carry out the control of standard, make that efficiently regulating the sweating heat input becomes possibility through vertical electro-gas heat is imported; Improve the stability and the reliability of system, strengthened the controllability of whole welding system; In addition, the double-wire welding gun that can in weld seam, swing guarantees that effectively weld seam sidewall and welding pool fully fuse, and the mechanical property of weld seam significantly improves.
[description of drawings]
Fig. 1 is the structured flowchart of the mariages vertical electro-gas system of low sweating heat input according to the invention;
Fig. 2 is the structural representation of the mariages vertical electro-gas system of low sweating heat input according to the invention;
Fig. 3 is the Fundamentals of Welding figure of the mariages vertical electro-gas system of low sweating heat input according to the invention;
Fig. 4 is the Fundamentals of Welding figure of mariages vertical electro-gas another embodiment of system of low sweating heat input according to the invention;
Fig. 5 is the swing sketch map of the mariages vertical electro-gas system of low sweating heat input according to the invention;
Fig. 6 is that (Fig. 6 a is the state diagram that double-wire welding gun 1 swings to the left side of vertical electro-gas groove for the torch swinging sketch map of mariages vertical electro-gas system of low sweating heat input according to the invention; Fig. 6 b is the state diagram of the centre of double-wire welding gun 1 groove that is positioned at vertical electro-gas, and Fig. 6 c is the state diagram that double-wire welding gun 1 swings to the groove right side of vertical electro-gas.)。
[specific embodiment]
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated.
See also Figure of description Fig. 1-6.First source of welding current 1 among the figure, second source of welding current 2, integrated power supply box 3, first wire-feed motor 4, second wire-feed motor 5, first gas are protected welding gun 6, second gas is protected welding gun 7, cooling water tank 8, water-cooled slide block 9, feeder 10, control cabinet 11, wig-wag 12, welding tractor 13, main arc 61, assistant electric arc 62, composite arc 63.
Like Fig. 1, shown in 2:
The invention provides a kind of mariages vertical electro-gas system of low sweating heat input, include that first source of welding current 1, second source of welding current 2, integrated power supply box 3, first wire-feed motor 4, second wire-feed motor 5, first gas are protected welding gun 6, second gas is protected welding gun 7, cooling water tank 8, water-cooled slide block 9, feeder 10, control cabinet 11, wig-wag 12 and welding tractor 13.Wherein, first source of welding current 1 and second source of welding current 2 are three phase mains, and are located at respectively in first welding machine and second welding machine, are mainly used in to the mariages vertical electro-gas provides working power, and all are connected on the input of integrated power supply box 3; Integrated power supply box 3 is the communication power supply box; Its output is connected with first wire-feed motor 4 and second wire-feed motor 5; And concentrate output to supply with the power supply of welding simultaneously; The input of integrated power supply box 3 also connects extranets electricity (380V) simultaneously, and output also is connected with cooling water tank 8 and control cabinet 11, and integrated power supply box 3 provides the defeated power supply that helps with the extranets electricity for cooling water tank 8 and control cabinet 11; First wire-feed motor 4 and second wire-feed motor 5 in welding process, protect welding gun 6 with external first gas of welding torch cable respectively and second gas guarantor welding gun 7 welds, and two welding gun dry extension of electrode degree constant distance, and fixed-site movement locus when welding is identical; Feeder 10 is to be carbon dioxide canister or carbon dioxide and/or argon gas and other protectiveness mist gas tank, protects welding gun 6 with first gas and is connected with water-cooled slide block 9; Control cabinet 11 is control cores of the mariages vertical electro-gas system of low sweating heat input; It provides accessory power supply by integrated power supply box 3; Control cabinet 11 sends the welding timing control signal and respectively arc, electric current and voltage is received in the starting the arc of welding tractor 13 (vertical gas electric welding dolly), wig-wag 12, first source of welding current 1 and the 22 source of welding current, and first wire-feed motor 4 and second wire-feed motor 5 are controlled.
Native system is in welding process, and first gas protects welding gun 6 and second gas is protected welding gun 7 and the interior welding pool of weld seam can produce a large amount of heat, and integrated power supply box 3 is cooling water tank 8 supply powers at this moment, and controls the work of cooling water tank 8 by control cabinet 11; When normal weldering, cooling water tank 8 is seen water off through compressor, successively through second gas protect welding gun 7, first gas is protected welding gun 6, water-cooled slide block 9, flows back to cooling water tank 8 at last, effectively carries out cooling processing; Simultaneously, in the process that realizes welding, carbon dioxide canister 10 is that first gas is protected welding gun 6 and water-cooled slide block 9 supply protective gas, is used for the welding molten pool metal is protected.
As shown in Figure 3:
First source of welding current 1 (being main electrode) of the mariages vertical electro-gas system of low sweating heat input of the present invention and the homopolarity output of second source of welding current 2 (being auxiliary electrode) are connected with the head end conducting of first gas guarantor's welding gun 6 (being the main arc power supply) simultaneously; First source of welding current, 1 another output is connected with welded piece 14, and second source of welding current, 2 another outputs are protected welding gun 7 (being the assistant electric arc power supply) head end conducting with second gas and are connected.During welding, first gas is protected the to be welded position (like weld seam) of welding gun 6 near welded piece 14, under the effect of first source of welding current 1, first gas is protected welding gun 6 terminal surfaces to be welded with welded piece 14 and is formed main arc 61; Simultaneously; Second gas is protected welding gun 7 ends protect welding gun 6 ends near first gas, under the effect of second source of welding current 2, first gas is protected between welding gun 6 ends and second gas guarantor welding gun, 7 ends and is formed assistant electric arc 62; Said main arc 61 forms composite arc 63 with assistant electric arc 62, realizes welding.
At this moment, the electric current of the welded piece 14 of flowing through is I1, and the electric current that second gas of flowing through is protected welding gun 7 is I2; The electric current that first gas of flowing through is protected welding gun 6 is I1+I2, and promptly being used to melt first gas, to protect the electric current of welding gun 6 welding wires be I1+I2, and being used to melt second gas, to protect the electric current of welding gun 7 welding wires be I2; And the electric current that is used to heat welded piece 14 is I1; The total current of filler wire is I1+2 * I2, and the electric current that welded piece 14 produces the available heats input is I1, and electric current I 1 and I2 same polarity, direction are identical; Then the total current of filler wire is greater than welded piece 14 is produced the electric current of available heat input, i.e. I1+2 * I 2＞I1.
Like this; When can be implemented in raising vertical electro-gas deposition rate, also reduce welding process heat input energy greatly, also promptly realized increasing substantially the welding wire deposition rate of unitary current through this welding method native system; Make the impact flexibility of weld seam significantly promote; Also can greatly reduce the material cost of welding, and carry out the control of standard, make that efficiently regulating the sweating heat input becomes possibility through vertical electro-gas heat is imported; Improve the stability and the reliability of system, strengthened the controllability of whole welding system.
As shown in Figure 4:
The Fundamentals of Welding of the mariages vertical electro-gas system of low sweating heat input of the present invention and the embodiment of Fig. 3 are basic identical; The homopolarity output of first source of welding current 1 and second source of welding current 2 is connected with the head end conducting of first gas guarantor welding gun 6 simultaneously; First source of welding current, 1 another output is connected with welded piece 14, and second source of welding current, 2 another outputs are protected welding gun 7 head end conductings with second gas and are connected.During welding, first gas is protected the to be welded position of welding gun 6 near welded piece 14, under the effect of first source of welding current 1, first gas is protected welding gun 6 terminal surfaces to be welded with welded piece 14 and is formed main arc 61; Simultaneously; Second gas is protected welding gun 7 ends protect welding gun 6 ends near first gas, under the effect of second source of welding current 2, first gas is protected between welding gun 6 ends and second gas guarantor welding gun, 7 ends and is formed assistant electric arc 62; Said main arc 61 forms composite arc 63 with assistant electric arc 62, realizes welding.Difference is: first source of welding current 1 that is connected with the head end conducting of first gas guarantor welding gun 6 among Fig. 3 embodiment and the homopolarity output of second source of welding current 2 are for anodal; And Fig. 4 embodiment is a negative pole; First source of welding current, 1 another output that is connected with welded piece 14 among Fig. 3 embodiment is negative pole with second source of welding current, 2 another outputs that are connected with the 7 head end conductings of second gas guarantor welding gun, and Fig. 4 embodiment is positive pole; That is to say the electric current anti-phase of two embodiment; But the welded piece 14 of flowing through, second gas are protected current uniform that welding gun 7 and first gas protects welding gun 6 Wei I1, I2 and I1+I2; Then the total current of filler wire is greater than welded piece 14 is produced the electric current of available heat input; Can be implemented in when improving the vertical electro-gas deposition rate, also reduce welding process heat input energy greatly.
Like Fig. 5, shown in 6:
Wig-wag 12 in the mariages vertical electro-gas system of low sweating heat input of the present invention; Include cross sliding clock 121 and rotary oscillation head 122; The double-wire welding gun of being made up of first gas guarantor's welding gun 6 and second gas guarantor welding gun 7 is fixed on this wig-wag 12; Said cross sliding clock 121 orders about double-wire welding gun along doing rectilinear motion perpendicular to the direction of weld seam 15, and the welding arc that double-wire welding gun produced can be done rectilinear motion between the water-cooled shaping slide block 152 in the shaping backing plate 151 of back of weld and weld seam front; Meanwhile; Rotary oscillation head 122 orders about double-wire welding gun and in the groove gap of vertical electro-gas, swings; Be double-wire welding gun can be between the left plate 153 of the groove of vertical electro-gas and right plate 154 reciprocally swinging, that is to say welding arc that double-wire welding gun produces reciprocally swinging, welding between the left plate 153 of the groove of vertical electro-gas and right plate 154.Like this, can guarantee effectively that weld seam sidewall and welding pool 155 fully fuse, the mechanical property of weld seam significantly improves.
Above content is to combine concrete optimal technical scheme to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (8)
1. the mariages vertical electro-gas system of one kind low sweating heat input is characterized in that: include first source of welding current (1), second source of welding current (2), integrated power supply box (3), first wire-feed motor (4), second wire-feed motor (5), first gas guarantor welding gun (6), second gas guarantor welding gun (7), feeder (10), control cabinet (11), wig-wag (12) and welding tractor (13); Wherein,
Said first source of welding current (1) all is connected with the input of said integrated power supply box (3) with second source of welding current (2), supplies with the welding job power supply;
Said first wire-feed motor (4), second wire-feed motor (5) and control cabinet (11) all are connected with the output of said integrated power supply box (3), and said first wire-feed motor (4) and second wire-feed motor (5) protect welding gun (6) with said first gas respectively and be connected with second gas guarantor's welding gun (7),
Said wig-wag (12) is installed on the said welding tractor (13), and the double-wire welding gun that said first gas is protected welding gun (6) and second gas guarantor's welding gun (7) composition is installed on the said wig-wag (12);
Said feeder (10) is protected welding gun (6) with said first gas and is connected with water-cooled slide block (9), and the input of said integrated power supply box (3) also connects the extranets electricity provides the defeated power supply that helps for said control cabinet (11);
Said control cabinet (11) and said welding tractor (13) and wig-wag (12) are used to accomplish the control that arc is received in the starting the arc.
2. the mariages vertical electro-gas system of low sweating heat input according to claim 1; It is characterized in that: the homopolarity output of said first source of welding current (1) and second source of welding current (2) is connected through the conducting that said integrated power supply box (3) and said first gas are protected welding gun (6) simultaneously; And another output of said first source of welding current (1) is connected with welded piece (14), and another output of said second source of welding current (2) is protected welding gun (7) conducting with second gas and is connected.
3. the mariages vertical electro-gas system of low sweating heat input according to claim 1 and 2; It is characterized in that: said wig-wag (12) includes and makes said double-wire welding gun along the rotary oscillation head (122) of doing rectilinear motion cross sliding clock (121) and said double-wire welding gun being swung in the groove gap of vertical electro-gas perpendicular to the direction of weld seam (15).
4. the mariages vertical electro-gas system of low sweating heat input according to claim 1; It is characterized in that: also include cooling water tank (8) and water-cooled slide block (9); Said cooling water tank (8) is connected with the output of said integrated power supply box (3); Said water-cooled slide block (9) is connected with said feeder (10), and said first gas is protected, and welding gun (6), second gas are protected welding gun (7), water-cooled slide block (9) is connected with cooling water tank (8) successively, the formation cooling circuit.
5. the mariages vertical electro-gas system of low sweating heat input according to claim 1; It is characterized in that: said first source of welding current (1) and second source of welding current (2) are three phase mains; Said integrated power supply box (3) is the communication power supply box; Said welding tractor (12) is a vertical gas electric welding dolly, and said feeder (10) is carbon dioxide canister or carbon dioxide and/or argon gas and other protectiveness mist gas tank.
6. the welding method of the mariages vertical electro-gas of one kind low sweating heat input; Comprise first gas is protected the to be welded position of welding gun (6) near welded piece (14); Protect the terminal surface to be welded of welding gun (6) at said first gas and form main arc (61) with welded piece (14); And second gas guarantor's welding gun (7) is terminal near first gas guarantor welding gun (6) end, between said first gas guarantor's welding gun (6) end and second gas guarantor welding gun (7) end, forming assistant electric arc (62), said main arc (61) and assistant electric arc (62) form composite arc (63); Meanwhile; Order about first gas through wig-wag (12) and protect welding gun (6) and second gas and protect weldering (7), and in the groove gap of vertical electro-gas, swing, realize welding simultaneously along doing rectilinear motion perpendicular to the direction of weld seam (15).
7. welding method according to claim 6; It is characterized in that: saidly be used to melt said first gas to protect the electric current of welding gun (6) welding wire be I1+I2; Being used to melt said second gas, to protect the electric current of welding gun (7) welding wire be I2; And the electric current that is used to heat said welded piece (14) is I1, and the total current of filler wire is I1+2 * I2, and the electric current that welded piece (14) produces the available heat input is I1; And said electric current I 1 is all identical with I2 polarity, direction, and promptly the total current of filler wire is greater than the electric current that welded piece (14) is produced the available heat input.
8. welding method according to claim 6; It is characterized in that: said first gas is protected welding gun (6) and second gas and is protected welding arc that welding gun (7) produced and between the water-cooled shaping slide block (152) in the shaping backing plate (151) of back of weld and weld seam front, do rectilinear motion, and between the left plate (153) of the groove of vertical electro-gas and right plate (154) reciprocally swinging.
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| CN102941393A (en) * | 2012-11-23 | 2013-02-27 | 南京奥特电气股份有限公司 | Circumferential seam single-pass electro-gas welding machine |
| CN102941393B (en) * | 2012-11-23 | 2015-07-22 | 南京奥特电气股份有限公司 | Circumferential seam single-pass electro-gas welding machine |
| CN103264206A (en) * | 2013-05-10 | 2013-08-28 | 深圳市瑞凌实业股份有限公司 | Welding method and welding device for single-gun twin-wire perpendicular gas electric welding gun |
| CN103341681A (en) * | 2013-06-26 | 2013-10-09 | 哈尔滨工业大学 | Multi-state double-wire electrical arc welding device and welding method |
| CN103706930A (en) * | 2013-12-11 | 2014-04-09 | 江门市保值久机电有限公司 | Portable multi-functional gas shielded welding gun |
| CN104999167A (en) * | 2015-06-30 | 2015-10-28 | 苏州华日金菱机械有限公司 | Thick steel plate vertical welding method |
| CN104985284A (en) * | 2015-06-30 | 2015-10-21 | 苏州华日金菱机械有限公司 | Double-wire electrogas welding machine |
| CN105014206A (en) * | 2015-06-30 | 2015-11-04 | 苏州华日金菱机械有限公司 | Single wire electrogas welding machine |
| CN108406156A (en) * | 2018-04-09 | 2018-08-17 | 沈若松 | A kind of low_input_power narrow gap vertical electro-gas method |
| CN109047997A (en) * | 2018-08-10 | 2018-12-21 | 武汉科技大学 | The welding method of tandem electrogas welding suitable for super large weld heat input |
| CN108856970A (en) * | 2018-08-24 | 2018-11-23 | 南京钢铁股份有限公司 | The welding method of tandem electrogas welding suitable for high strength ultra-thick steel plates |
| CN112171009A (en) * | 2020-09-27 | 2021-01-05 | 北京博清科技有限公司 | Welding method and welding device |
| CN113857620A (en) * | 2021-10-25 | 2021-12-31 | 天津新松机器人自动化有限公司 | Robot double-wire welding method |
| CN113857620B (en) * | 2021-10-25 | 2023-04-28 | 天津新松机器人自动化有限公司 | Robot double-wire welding method |
| CN115338516A (en) * | 2022-08-31 | 2022-11-15 | 南京钢铁股份有限公司 | Welding method suitable for double-wire electrogas welding of high-strength super-thick steel plate |
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Application publication date: 20120718 |