CN103737158B - A kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input - Google Patents

A kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input Download PDF

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Publication number
CN103737158B
CN103737158B CN201310749801.3A CN201310749801A CN103737158B CN 103737158 B CN103737158 B CN 103737158B CN 201310749801 A CN201310749801 A CN 201310749801A CN 103737158 B CN103737158 B CN 103737158B
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Prior art keywords
welding
torch
arc welding
gas shielded
welding torch
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CN201310749801.3A
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CN103737158A (en
Inventor
苗玉刚
徐向方
韩端锋
王博雅
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Harbin Engineering University
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Harbin Engineering University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/24Features related to electrodes
    • B23K9/28Supporting devices for electrodes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/02Seam welding; Backing means; Inserts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • B23K9/167Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • B23K9/173Arc welding or cutting making use of shielding gas and of a consumable electrode
    • B23K9/1735Arc welding or cutting making use of shielding gas and of a consumable electrode making use of several electrodes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention belongs to metal solder field, be specifically related to a kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input.A kind of double melt pole electrical arc welding guns controlled based on heat input; auxiliary is outer puts fixing non-melt pole gas shielded arc welding torch; there is screw rod auxiliary overcoat both sides; melting pole gas shielded arc welding torch is fixed on regulation gear assembly; one end has screw rod, the screw rod on regulation gear assembly to be linked together by female branch sleeve with the screw rod of auxiliary overcoat both sides;By branch sleeve, two melting pole gas shielded arc welding torches are connected to the both sides of non-melt pole gas shielded arc welding torch.This welding gun and welding method thereof reduce the heat input acting on workpiece while can realizing high deposition rate, reduce the welding deformation of workpiece, significantly improve welding quality, expand weld procedure specification interval, it is a kind of efficient, welding technology of low_input_power, especially there is in the welding of cut deal clear superiority.

Description

A kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input
Technical field
The invention belongs to metal solder field, be specifically related to a kind of double melt pole electrical arc welding guns controlled based on heat input and welding thereof Method.
Background technology
High efficiency is the developing direction of current solder technology.Realizing efficient welding, one is to improve speed of welding, but improves Speed of welding is easily generated the defects such as lack of penetration, welding bead discontinuous, undercut;Two is to improve welding wire deposition rate, but normal melting extremely electricity During arc-welding (as MIG/MAG welds), while improving welding wire deposition rate, also imply that the increase of the defeated people of sweating heat, thus draw The problem such as welding deformation, heat affected area expansion of rising.
In order to solve the problems referred to above, Kentucky university of the U.S. opens abundant penetrating judgment and awards proposition a kind of hot input control method, i.e. in welding Electric current shunts it before flowing into mother metal, reduces the heat input of mother metal.After the method proposes, many scholars have carried out relevant grinding Study carefully.Such as: double bypass coupling electric arc aluminum alloy MIG welding transfer manner of droplet are studied by the stone of Lanzhou University of Science & Technology, Result shows that double bypass coupling electric arc can promote the droplet transfer and can significantly reduce the critical current of spray transfer;China Patent No. For the patent document of CN201110269628.8 has been recorded a kind of pair of consumable electrode list arc bypass coupling composite welding system and side Method, including the first welding machine, the second welding machine, the first welding wire and the second welding wire, wherein: the anode of the first welding machine and the second welding machine is altogether Being connected with the first welding wire, the first welding wire forms electric arc with workpiece;The negative electrode of the first welding machine is connected with workpiece;The moon of second welding machine Pole is connected with the second welding wire, and the second welding wire and workpiece are formed without electric arc;The patent document note of U.S. Patent No. US2012012559 Carry a kind of welding system controlling heat input, comprised the following steps: had in the hot input range needed for receiving data, coding Between higher limit and the lower limit of hot input value, the level needed for receiving the coding of data changes to the first welded seam variable Group variable, determines the change of the second weld seam variable of the setting of a level welding variable;China Patent No. is The patent document of CN201841347U describes a kind of Novel double-wire welding gun, and welding torch cable afterbody is set up in parallel two welding gun afterbodys even Joint, by exporting the design of two root wires simultaneously, improves welding efficiency.
Above research work is mostly focused in the physical characters of arc of heat input control technology and the design of double-wire welding gun, is so far Only, also do not have a kind of welding gun and welding method thereof controlled based on heat input to be really applied in production practices, play it excellent Gesture place.To this end, the present invention devises a kind of novel double melting pole guns controlled based on heat input, and describe its welding Method.
Summary of the invention
It is an object of the invention to provide a kind of based on reducing welding deformation, improving welding wire deposition rate, raising welding quality, pursuit High-energy-density and the homogeneous arc shape of character, realize stably welding, improving welding process, reduce inputting based on heat of splashing The double melt pole electrical arc welding guns controlled, the present invention also aims to provide a kind of double metal arc weldings controlled based on heat input The welding method of rifle.
The object of the present invention is achieved like this:
A kind of double melt pole electrical arc welding guns controlled based on heat input, non-molten by two melting pole gas shielded arc welding torches and one Changing pole gas shielded arc welding torch and mechanical adjusting structure composition, auxiliary is outer puts fixing non-melt pole gas shielded arc welding torch, There is screw rod auxiliary overcoat both sides, and regulation gear assembly fixes melting pole gas shielded arc welding torch, and there is screw rod one end, regulates tooth Screw rod on wheel assembly is linked together by female branch sleeve with the screw rod of auxiliary overcoat both sides;Pass through branch sleeve Two melting pole gas shielded arc welding torches are connected to the both sides of non-melt pole gas shielded arc welding torch;Consumable electrode gas-arc It is provided with between arc torch and non-melt pole gas shielded arc welding torch and fixes two stationary fixtures;Regulation gear assembly another End has rotation adjusting handle, melting pole gas shielded arc welding torch has and rotates the broached-tooth design that adjusting handle matches.
Melting pole gas shielded arc welding torch is MIG welding torch, and non-melt pole gas shielded arc welding torch is tig torch.
Melting pole gas shielded arc welding torch and non-melt pole gas shielded arc welding torch are connected on constant voltage source.
A kind of welding method of the double melt pole electrical arc welding guns controlled based on heat input, including:
Step 1: the position to be welded of workpiece is processed into I shape, Y shape or V-butt as required, and its both side surface is entered Row polishing and cleaning;
Step 2: be placed on jig by workpiece, adjusts seaming position and is allowed to overlap, so with welding gun tungsten electrode tip track route After utilize fixture to be fixed;
Step 3: adjust double melt pole electrical arc welding gun parameter, it is ensured that both sides MIG welding torch is symmetrically placed in tig torch both sides, makes two Side MIG welding torch is positioned at sustained height, and its welding wire is most advanced and sophisticated is 2-10mm away from mother metal distance, and the distance between welding wire and tungsten electrode is 2-8mm, the tungsten electrode height away from workpiece is 3-10mm;
Step 4: set welding condition: the electric current of constant current source is between 0-300A, and the welding current of constant voltage source exists Between 50-500A, weldingvoltage be 15-30V, speed of welding is between 10-200cm/min, and MIG torch gas flow is 8-30L/min, tig torch gas flow is 4-15L/min;
Step 5: opening constant current source and constant voltage source, ignite welding arc, this such both sides MIG welding torch and tig torch it Between define a stable coupled arc, and then filler wire, weld workpiece.
The beneficial effects of the present invention is:
1, minimizing effect while this welding gun and welding method thereof can realize high deposition rate (being 2-3 times of conventional MIG weldering) In the heat input of workpiece, reduce the welding deformation of workpiece, significantly improve welding quality, expand weld procedure specification interval, It is a kind of efficient, welding technology of low_input_power, especially there is in the welding of cut deal clear superiority.
2, use both sides double consumable electrode, the unique combination of middle non-melt welding gun, can define one stable, symmetrical, equal The coupled arc of one, this arc energy density is higher, electric arc outspoken nature is good, distribution of electromagnetic force is more concentrated.Meanwhile, thermal source is right Claim distribution, reduce spatter, improve appearance of weld, drastically increase welding quality, be a kind of stable, practical Welding procedure.
3, the method belongs to the remodeling of arc welding in itself, so it is also the high-efficiency welding method of a kind of low cost.Apply In welding production, production efficiency will be greatly improved, reduce welding cost, improve welding quality, it is possible to achieve efficiently, high-quality and Low cost is welded, and has the biggest engineering practical value.
4, owing to having the features such as thermal weld stress is low, welding wire deposition efficiency high, welding deformation is little, this welding gun and welding method thereof It is not only suitable for the efficient welding of same metal material, is more suitable for the welding of dissimilar metal (such as Ti-Al, Fe-Al, Fe-Mg etc.) Or built-up welding.
5, this system welding procedure is stablized and has the strongest welding adaptability, and according to actual welding demand, welding position can be Downhand welding, it is also possible to weld (such as vertical position welding etc.) for other position;According to the character of welding metal, the protection gas of consumable electrode gas arc welding Body both can be Ar, it is possible to for CO2Or mixed gas etc., it is possible to it is widely used in the welding process of various metals structure.
Accompanying drawing explanation
Fig. 1 is that welding gun of the present invention forms schematic diagram;
Fig. 2 is the partial enlarged drawing of governor motion;
Fig. 3 is the double melting electrode welding method schematic diagram of single constant voltage source;
Fig. 4 is the double melting electrode welding method schematic diagram of double constant voltage source.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in more detail:
The present invention relates to a kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input, in order to realize purpose, this Invention adopts the following technical scheme that
This welding gun is by two melting pole gas shielded arc welding torches (MIG welding torch I, MIG welding torch II) and a non-melt pole gas Body shielded arc welding torch (tig torch) and associated mechanical adjustment structure composition.Auxiliary overcoat is fixed on tig torch, logical Cross branch sleeve to be connected with both sides MIG welding torch.Screw rod between both sides MIG welding torch and tig torch is to be joined by one Closing female auxiliary overcoat to connect, when sleeve rotates to a direction, two screw rods are the most close to each other, otherwise, with Time away from, so can realize MIG welding torch and the regulation of tig torch left and right distance.Meanwhile, MIG welding torch has fixing outside Pipe screw thread, realizes the up and down motion relative to tig torch of the MIG welding torch by adjusting handle with regulation gear assembly.When MIG, After distance regulation between tig torch terminates, stationary fixture is utilized to be linked together by three welding torches.
In order to ensure welding effect, play the optimum efficiency of this welding gun, need to ensure that both sides MIG welding torch is symmetrically placed in tig torch two Side.During welding, both sides MIG welding torch both can be simultaneously coupled to the positive pole of the same constant voltage source of welding current, it is also possible to respectively with two perseverances The positive pole of voltage source is connected.Meanwhile, tig torch is connected with the negative pole of constant current source, after the electric arc that ignites, this welding gun and workpiece it Between forming properties is homogeneous, symmetrical shape, high current density, low arc pressure, stable coupled arc.Mariages coupled arc can To melt more welding wire within the identical time, improve deposition rate;On the one hand tig torch increases the fusion current of welding wire, another Aspect shunts a part by the welding current of mother metal as bypass;MIG welding torch and tig torch by each self-powered of independent current source, There is bigger welding parameter range of accommodation.Therefore, this combination welding gun and welding method thereof can realize high deposition rate welding (be 2-3 times of conventional MIG weldering) while reduce the heat input acting on workpiece, the welding deformation of reduction workpiece, significantly improve Welding quality, expands weld procedure specification interval, is a kind of efficient welding new technology, especially has in the welding of cut deal Clear superiority.
This device is after regulating welding procedure, and its using method is similar to a single melt pole electrical arc welding gun, the most just The most flexible.It is embodied as step as follows:
Step 1: the position to be welded of workpiece is processed into I shape, Y shape or V-butt as required, and its both side surface is entered Row polishing and cleaning;
Step 2: be placed on jig by workpiece, adjusts seaming position and is allowed to overlap with TIG welding gun tungsten electrode tip track route, Then fixture is utilized to be fixed;
Step 3: adjust double melt pole electrical arc welding gun parameter, it is ensured that both sides MIG welding torch is symmetrically placed in tig torch both sides, makes two Side MIG welding torch is positioned at sustained height, and its welding wire is most advanced and sophisticated is 2-10mm away from mother metal distance, and the distance between welding wire and tungsten electrode is 2-8mm, the tungsten electrode height away from workpiece is 3-10mm;
Step 4: setting welding condition, the welding current of constant voltage source is between 50-500A, and weldingvoltage is 15-30V, The electric current of constant current source is between 0-300A, and speed of welding is between 10-200cm/min, and MIG torch gas flow is 8-30L/min, TIG welding gun gas flow is 4-15L/min;
Step 5: opening the source of welding current, ignite welding arc, defines one between such both sides MIG welding torch and tig torch Stable coupled arc, and then filler wire, weld workpiece.
Fig. 1 is the welding gun composition schematic diagram of the present invention, mainly by directly tig torch 1, both sides MIG welding torch 2, stationary fixture 3, auxiliary overcoat 7, adjusting handle 9, the regulation composition such as gear assembly 10 and branch sleeve (female thread) 11.Outside assisting Set 7 is fixed on directly on tig torch 1, is connected with both sides MIG welding torch 2 by branch sleeve (female thread) 11.Rotation Turn branch sleeve (female thread) 11 and can realize MIG welding torch 2 and the regulation of tig torch about 1 distance;Rotate adjusting handle 9 With the up and down motion that regulation gear assembly 10 can realize the relative tig torch of MIG welding torch 21.When MIG, tig torch it Between distance regulation terminate after, utilize stationary fixture 3 to be linked together by three welding torches.Remote, near, high and low between welding torch Governor motion enlarged drawing is shown in accompanying drawing two, can realize MIG welding torch by the occlusion between branch sleeve female thread 13 and screw rod 14 The regulation of left and right distance between 2 and tig torch 1.
Fig. 3 and Fig. 4 is the concrete welding Method And Principle figure of the present invention, the most independently-powered according to two consumable electrode welding torches, can divide For the double melting electrode welding method (accompanying drawing three) of single constant voltage source and the double melting electrode welding method (accompanying drawing four) of double constant voltage source.In order to Ensure welding effect, play the optimum efficiency of this welding gun, need to ensure that both sides MIG welding torch is symmetrically placed in tig torch both sides, TIG Welding torch is connected with the negative pole of constant current source.This device is after regulating welding procedure, and its using method is similar to a common list Melt pole electrical arc welding gun, very convenient flexibly.Concrete welding step is as follows:
Step 1: the position to be welded of workpiece 17 is processed into I shape, Y shape or V-butt as required, and to its both side surface Polish and clean;
Step 2: be placed on jig by workpiece 17, adjusts seaming position and is allowed to and TIG welding gun tungsten electrode tip track route weight Close, then utilize fixture to be fixed;
Step 3: adjust double melt pole electrical arc welding gun parameter, it is ensured that both sides MIG welding torch is symmetrically placed in tig torch both sides, makes two Side MIG welding torch is positioned at sustained height, and its welding wire is most advanced and sophisticated is 2-10mm away from mother metal distance, and the distance between welding wire and tungsten electrode is 2-8mm, the tungsten electrode height away from workpiece is 3-10mm;
Step 4: set welding condition: the electric current of constant current source 15 is between 0-300A, and the welding of constant voltage source 16 is electric Flow between 50-500A, weldingvoltage is 15-30V, and speed of welding is between 10-200cm/min, MIG torch gas stream Amount is 8-30L/min, and tig torch gas flow is 4-15L/min;
Step 5: opening constant current source 15 and constant voltage source 16, ignite welding arc, this such both sides MIG welding torch and TIG Define a stable coupled arc, and then filler wire between welding torch, weld workpiece.

Claims (1)

1. a welding method for the double melt pole electrical arc welding guns controlled based on heat input, auxiliary is outer puts fixing non-melt pole gas Shielded arc welding torch, there is screw rod auxiliary overcoat both sides, regulation gear assembly fix melting pole gas shielded arc welding torch, one end Screw rod, the screw rod on regulation gear assembly is had to be linked together by female branch sleeve with the screw rod of auxiliary overcoat both sides; By branch sleeve, two melting pole gas shielded arc welding torches are connected to the both sides of non-melt pole gas shielded arc welding torch;Molten Change, between pole gas shielded arc welding torch and non-melt pole gas shielded arc welding torch, two stationary fixtures are installed;Regulation gear train The other end of part has rotation adjusting handle, melting pole gas shielded arc welding torch has and rotates the sawtooth knot that adjusting handle matches Structure;
Described melting pole gas shielded arc welding torch is MIG welding torch, and non-melt pole gas shielded arc welding torch is tig torch;
Melting pole gas shielded arc welding torch and non-melt pole gas shielded arc welding torch are connected on constant voltage source, it is characterised in that:
Step 1: the position to be welded of workpiece is processed into I shape, Y shape or V-butt as required, and its both side surface is entered Row polishing and cleaning;
Step 2: be placed on jig by workpiece, adjusts seaming position and is allowed to overlap, so with welding gun tungsten electrode tip track route After utilize fixture to be fixed;
Step 3: adjust double melt pole electrical arc welding gun parameter, it is ensured that both sides MIG welding torch is symmetrically placed in tig torch both sides, makes two Side MIG welding torch is positioned at sustained height, the welding wire of both sides MIG welding torch most advanced and sophisticated away from mother metal distance be 2-10mm, welding wire and tungsten electrode it Between distance be 2-8mm, the tungsten electrode height away from workpiece is 3-10mm;
Step 4: set welding condition: the electric current of constant current source is between 0-300A, and the welding current of constant voltage source exists Between 50-500A, weldingvoltage be 15-30V, speed of welding is between 10-200cm/min, and MIG torch gas flow is 8-30L/min, tig torch gas flow is 4-15L/min;
Step 5: opening constant current source and constant voltage source, ignite welding arc, between such both sides MIG welding torch and tig torch Define a stable coupled arc, and then filler wire, weld workpiece.
CN201310749801.3A 2013-12-31 2013-12-31 A kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input Expired - Fee Related CN103737158B (en)

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