CN109332858A - A kind of hollow tungsten electrode profundity melts the welding method of TIG filler wire welding slab - Google Patents
A kind of hollow tungsten electrode profundity melts the welding method of TIG filler wire welding slab Download PDFInfo
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- CN109332858A CN109332858A CN201811430873.0A CN201811430873A CN109332858A CN 109332858 A CN109332858 A CN 109332858A CN 201811430873 A CN201811430873 A CN 201811430873A CN 109332858 A CN109332858 A CN 109332858A
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- welding
- tungsten electrode
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- 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/285—Cooled electrode holders
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention is a kind of welding method of molten TIG filler wire welding slab of hollow tungsten electrode profundity, comprising the following steps: step 1: workpiece to be welded is fixed on welding tool setup；Step 2: starting welding machine; welding parameter: welding current 300-1000A is set; striking current goes out 350-1100A; cut-off current is 200-300A; arcing time is 0.4-0.6s; transit time is 0.5-0.8s, and fall time 2-3s, ion-gas flow is 4-6L/min; protection air-flow amount is 15-20L/min; the preflow time is 3-5s, and hollow tungsten electrode inner hole is passed through argon gas, throughput 3-5L/min; throughput is 18-20L/min; being soldered gas delay is 15-40s, workpiece gap 0.2-0.5mm, speed of welding 200-500mm/min；Wire feeding mouth and tungsten electrode angle are 15 ° -30 °, wire feed rate 100-350mm/min；Step 3: by weld preparation on welding machine and welding start button, start to carry out thick plates.The present invention, which realizes, disposably penetrates slab, while realizing high-speed welding slab, ensure that the formation of the weld seam of high quality.
Description
Technical field
The present invention relates to a kind of welding methods, and it is thick to particularly relate to a kind of molten TIG filler wire welding of hollow tungsten electrode profundity
The welding method of plate.
Background technique
All the time, Tig Welding process is stablized, and welding quality is preferable, and it is raw to be widely used in actual welding
In production, but there are apparent defects for this method: the single-pass welding fusion penetration of welding is shallow, and deposition rate is low and is not suitable for thick plates.
By the advanced molten lockhole STIG welding system (SWS-1000) of Shanghai Duo Mu Industrial Co., Ltd. research and development, by the efficient of electric arc
Electromagnetic compression achievees the effect that plasma-arc, and arc energy is concentrated when welding, arc pressure and liquid state of molten pool in welding process
Metallic surface tension reaches balance, forms stable keyhole effect, has superpower penetration capacity, can disposably penetrate
12mm steel plate below.
Since welding current is larger, welding molten wide is also larger, this requires needing to increase wire feed rate when wire feed,
But since external wire feed can make welding wire residence time in electric arc short, when wire feed rate increases, it is easy to appear welding wire and comes not
And melts and enter molten bath and form be mingled with equal welding defects.
Summary of the invention
To solve the above-mentioned problems, the present invention provides the welding that a kind of hollow tungsten electrode profundity melts TIG filler wire welding slab
Method, should be by being changed to hollow tungsten electrode for originally coarse solid tungsten electrode, in the case where same weld condition, due to hollow tungsten
It is passed through argon gas in extremely, welding arc is further compressed, arc energy is more concentrated, while welding wire being changed to send inside welding gun
Silk also ensures that welding wire can faster be melted into molten bath while guaranteeing to accelerate to penetrate welded slab workpiece, is formed good
Weld seam.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
The present invention is a kind of welding method of molten TIG filler wire welding slab of hollow tungsten electrode profundity, it is characterised in that: the welding side
Method the following steps are included:
Step 1: before welding, workpiece surface to be welded is polished or is cleaned, the workpiece to be welded after polishing or cleaning is fixed on
On welding tool setup, thickness of workpiece 5-14mm, the distance of tungsten electrode bottom end and workpiece is 2-3mm；
Step 2: starting welding machine, welding parameter is arranged: welding manner is sequential welding or impulse welding, welding current 300-
1000A, striking current go out 350-1100A, cut-off current 200-300A, arcing time 0.4-0.6s, and transit time is
0.5-0.8s, fall time 2-3s, welding gun protective gas and ionized gas use argon gas or gaseous mixture, and ion-gas flow is 4-
6L/min, protection air-flow amount are 15-20L/min, and the preflow time is 3-5s, and hollow tungsten electrode inner hole is passed through argon gas, throughput
For 3-5L/min, gas being protected on weld seam and lower protection gas is argon gas, throughput is 18-20L/min, is soldered gas and is delayed and is
15-40s, workpiece gap 0.2-0.5mm, speed of welding 200-500mm/min；Wire feeding mouth and tungsten electrode angle are 15 ° -30 °,
Wire feed rate is 100-350mm/min；
Step 3: by weld preparation on welding machine and welding start button, start to carry out thick plates.
The beneficial effects of the present invention are: of the invention (1) is changed to hollow tungsten electrode by common solid tungsten electrode, by protective gas from
Hollow tungsten electrode inner cavity input, by there is the tungsten electrode internal chamber wall of water cooling after ionization, electric arc is shunk protective gas by cold wall, from
And the plasma arc of arc energy density altitude can be obtained；(2) plasma is reached by the high-efficiency electromagnetic compression to electric arc
The effect of electric arc, arc energy is concentrated when welding, and arc pressure is reached with liquid state of molten pool metallic surface tension in welding process
Balance, forms stable keyhole effect, has superpower penetration capacity, can disposably penetrate 12mm steel plate below；(3) will
Welding wire is changed to by external wire feed by wire feed inside welding gun, and welding wire is fusing into molten bath faster, in electric arc and hollow tungsten electrode inner hole
Under the collective effect of gas, agitation molten pool increases weld penetration, fast implements the through welding of workpiece, improve welding efficiency and
Quality；(4) the achievable full-automatic operation of the present invention, in actual welding production, operation is simple, and it is double to realize single welding
Face forming, while improving welding efficiency, ensure that the high quality of weld seam.
The present invention, which realizes, disposably penetrates slab, while realizing high-speed welding slab, ensure that high quality
The formation of weld seam.
Detailed description of the invention
Fig. 1 is welding schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of tungsten electrode of the present invention.
Fig. 3 is the top view of tungsten electrode of the present invention.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
It states, the embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
As shown in Figure 1-3, the present invention is a kind of welding method of molten TIG filler wire welding slab of hollow tungsten electrode profundity, it is special
Sign is: the welding method the following steps are included:
Step 1: before welding, workpiece surface to be welded is polished or is cleaned, the workpiece to be welded after polishing or cleaning is fixed on
On welding tool setup, thickness of workpiece 5-14mm, the distance of tungsten electrode bottom end and workpiece is 2-3mm；
Step 2: starting welding machine, welding parameter is arranged: welding manner is sequential welding or impulse welding, welding current 300-
1000A, striking current go out 350-1100A, more slightly higher than welding current, cut-off current 200-300A, arcing time 0.4-
0.6s, transit time 0.5-0.8s, fall time 2-3s, welding gun protective gas and ionized gas use argon gas or mixing
Gas, ion-gas flow are 4-6L/min, and protection air-flow amount is 15-20L/min, and the preflow time is 3-5s, in hollow tungsten electrode
Hole is passed through argon gas, throughput 3-5L/min, protects gas on weld seam and lower protection gas is argon gas, throughput is 18-20L/
Min, being soldered gas delay is 15-40s, workpiece gap 0.2-0.5mm, speed of welding 200-500mm/min；Wire feeding mouth with
Tungsten electrode angle is 15 ° -30 °, wire feed rate 100-350mm/min；
Step 3: by weld preparation on welding machine and welding start button, start to carry out thick plates.
The welding method uses a kind of welding gun and uses hollow tungsten electrode as electrode in welding gun, and there is tungsten on the top of welding gun
Pole inner hole air inlet 1 has tungsten electrode inner hole gas vent 7 in the lower end of tungsten electrode, and there are also cooling water outlet 2 and cooling waters in welding gun
Entrance 3, is passed through protection gas 4 between tungsten electrode and welding gun outer wall 9, welding gun is passed through protection gas in the top of workpiece 10, on welding gun top
That is argon gas, gas enter electric arc 8 by welding gun and tungsten electrode, and welding wire 6 is outer diameter by 5 wire feed of wire feeding mouth, the size of hollow tungsten electrode
The annulus of 0.2mm or so is processed into 5mm, diameter of bore 3mm, tungsten electrode end, and angle is 20 degree, this ensure that the stabilization of the starting the arc
Property, while tungsten electrode is unlikely to be burnt, and biggish welding current can be used, and while realizing high-speed welding, it is defeated to increase sweating heat
Enter, increase welding deposition efficiency and speed of welding, while increasing fusion penetration, use wire feed inside welding gun instead, is increasing wire speed
With guarantee welding wire thawing can be paved with entire weld seam molten bath while, avoid occur welding wire fail completely melt and enter molten bath
The appearance of situation, the formation of the high quality weld seam preferably guaranteed.
The present invention provides a kind of highly efficient hollow tungsten electrode TIG filler wire welding slab method, and hollow tungsten electrode profundity melts TIG
Weldering can be in conjunction with the advantages of two kinds of welding methods, and the tungsten electrode of hollow tungsten electrode is equally relatively thick, but due to the presence of tungsten electrode inner hole, intermediate
Gas has certain cooling effect to tungsten electrode, the scaling loss speed of tungsten electrode in welding process is slowed down, due to welding arc itself
Straightness is higher, and by the way of the wire feed of welding gun inside, deposited metals are able to faster enter welding pool, in hollow tungsten electrode
Inner hole is passed through under the action of argon gas, agitation molten pool, fills entire weld seam faster, while improving weld penetration when welding, can
Welding plate thickness is welded to further increase TIG.
Claims (1)
1. the welding method that a kind of hollow tungsten electrode profundity melts TIG filler wire welding slab, it is characterised in that: the welding method includes
Following steps:
Step 1: before welding, workpiece surface to be welded is polished or is cleaned, the workpiece to be welded after polishing or cleaning is fixed on
On welding tool setup, thickness of workpiece 5-14mm, the distance of tungsten electrode bottom end and workpiece is 2-3mm；
Step 2: starting welding machine, welding parameter is arranged: welding manner is sequential welding or impulse welding, welding current 300-
1000A, striking current go out 350-1100A, cut-off current 200-300A, arcing time 0.4-0.6s, and transit time is
0.5-0.8s, fall time 2-3s, welding gun protective gas and ionized gas use argon gas or gaseous mixture, and ion-gas flow is 4-
6L/min, protection air-flow amount are 15-20L/min, and the preflow time is 3-5s, and hollow tungsten electrode inner hole is passed through argon gas, throughput
For 3-5L/min, gas being protected on weld seam and lower protection gas is argon gas, throughput is 18-20L/min, is soldered gas and is delayed and is
15-40s, workpiece gap 0.2-0.5mm, speed of welding 200-500mm/min；Wire feeding mouth and tungsten electrode angle are 15 ° -30 °,
Wire feed rate is 100-350mm/min；
Step 3: by weld preparation on welding machine and welding start button, start to carry out thick plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430873.0A CN109332858B (en) | 2018-11-28 | 2018-11-28 | Welding method for hollow tungsten ultra-high deep-melting TIG filler wire welding thick plate |
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|---|---|---|---|
| CN201811430873.0A CN109332858B (en) | 2018-11-28 | 2018-11-28 | Welding method for hollow tungsten ultra-high deep-melting TIG filler wire welding thick plate |
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| CN109332858A true CN109332858A (en) | 2019-02-15 |
| CN109332858B CN109332858B (en) | 2022-04-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558764A (en) * | 2020-05-22 | 2020-08-21 | 株洲天一自动焊接装备有限公司 | Turbine shell rocker arm welding method |
| CN117324733A (en) * | 2023-10-26 | 2024-01-02 | 广东福维德焊接股份有限公司 | Deep fusion welding gun structure |
| CN117324733B (en) * | 2023-10-26 | 2024-05-24 | 广东福维德焊接股份有限公司 | Deep fusion welding gun structure |
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| CN111558764A (en) * | 2020-05-22 | 2020-08-21 | 株洲天一自动焊接装备有限公司 | Turbine shell rocker arm welding method |
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| CN117324733B (en) * | 2023-10-26 | 2024-05-24 | 广东福维德焊接股份有限公司 | Deep fusion welding gun structure |
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| CN109332858B (en) | 2022-04-01 |
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