CN105817737A - Double-tungsten electrode TIG (tungsten inert gas) overlaying technology - Google Patents
Double-tungsten electrode TIG (tungsten inert gas) overlaying technology Download PDFInfo
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- CN105817737A CN105817737A CN201610223819.3A CN201610223819A CN105817737A CN 105817737 A CN105817737 A CN 105817737A CN 201610223819 A CN201610223819 A CN 201610223819A CN 105817737 A CN105817737 A CN 105817737A
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- welding
- bead
- electrode tig
- welding gun
- overlaying
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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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/042—Built-up welding on planar surfaces
-
- 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
- B23K9/1675—Arc welding or cutting making use of shielding gas and of a non-consumable electrode making use of several electrodes
Abstract
The invention discloses a double-tungsten electrode TIG (tungsten inert gas) overlaying technology. The double-tungsten electrode TIG overlaying technology is characterized in that when the overlaying starts, an overlaying gun machine head does not swing; when a welding pool is completely formed, the overlaying gun machine head swings in the direction vertical to the welding direction, and moves in the welding direction; when looped continuous overlaying changes lanes for lap joint, a welding gun stops swinging; and after deviating, the welding gun normally swings. According to the double-tungsten electrode TIG overlaying technology, when the welding pool is completely formed, the welding gun machine head swings left and right with the welding direction adopted as the center, the welding gun machine head swings on the basis of double-tungsten electrode TIG overlaying, the pool volume is larger compared with the pool volume when swinging overlaying is not carried out, the welding deposition efficiency is greatly improved, and the technology has the advantages that the overlaying quality is high, the shape is beautiful, the deposition efficiency is high, the dilution rate is low, the cost is low, and the like.
Description
Technical field
The present invention relates to a kind of TIG weld method, a kind of process swinging efficient built-up welding based on double tungsten electrode TIG.
Background technology
Nuclear power, petrochemical industry type III pressure vessel component home need at surface of low-alloy steel built-up welding rustless steel transition zone, anticorrosion layer or Ni-based overlay cladding at present.Existing process is mainly strip surfacing, TIG built-up welding, manual welding.Strip surfacing welding quality is low, the defect such as slag inclusion, incomplete fusion easily occurs；TIG built-up welding welding quality is high, but welding efficiency is low, is not suitable for large-area built-up welding；Manual welding welding quality is unstable, relies on operative's technical ability, and automaticity is low.
Summary of the invention
The present invention is directed to the proposition of problem above, and research design one electrode TIG bead-welding technology, in order to solve existing welding procedure when surface of low-alloy steel built-up welding rustless steel transition zone, anticorrosion layer or Ni-based overlay cladding, there is the shortcomings such as welding quality is low, welding efficiency is low, automaticity is low.The technological means that the present invention uses is as follows:
A kind of electrode TIG bead-welding technology, when built-up welding starts, welding gun head does not swings, after welding pool is formed completely, welding gun head vertical welding direction swings, and advances along welding direction, when lopping continuous built-up welding lane-change overlaps, welding gun stops swinging, and after welding gun offsets, recovers normal and swings.
As preferably during oscillating build-up welding, welding gun has the time of staying at the two ends extreme position swung, and the time of staying of welding gun ibid one welding bead overlap joint side extreme position is more than the time of staying away from upper one welding bead side extreme position.
As preferably during oscillating build-up welding, the welding gun wire feed rate when the two ends extreme position swung stops is different, and the wire feed rate of welding gun ibid one welding bead overlap joint side extreme position is more than the wire feed rate away from upper one welding bead side extreme position.
When not swinging as preferred weld welding gun head, wire feed at a slow speed, when welding gun head carries out wobbling action, quick wire feed.
As two tungsten electrodes of preferred electrode TIG built-up welding, before and after entering in direction before welding, direction is arranged.
As two tungsten electrodes of preferred electrode TIG built-up welding, the pulse phase difference of the welding current of process is 180 °.
As preferably when lopping continuous built-up welding lane-change overlaps, wire feed rate slows down, and welding gun stops swinging, and electric current reduces, and after welding gun offsets, recovers normal weld specification and swing.
It it is 1.1～1.3 seconds as the time of staying of one welding bead overlap joint side extreme position on preferred welding gun；Welding gun away from time of staying of one welding bead side extreme position be 0.6～0.8 second.
After initiateing as preferred built-up welding, after welding gun head is not rocked to form molten bath, the transit time that head starts to swing is 3 to 5 seconds.
As preferably during oscillating build-up welding, the swing width of welding gun is 5mm-20mm, and swing speed is 1000mm/min-3600mm/min.
Compared with the prior art, electrode TIG bead-welding technology of the present invention, after welding pool is formed completely, welding gun head swings centered by welding direction, on the basis of electrode TIG built-up welding, it is achieved welding gun head wobbling action, volume less oscillating build-up welding time-varying in molten bath is big, welding deposition efficiency is greatly improved, and has that surfacing quality is high, it is attractive in appearance to shape, deposition efficiency is high, dilution rate is low, low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is the schematic diagram (in figure, the direction of arrow is welding direction) of welding bead of the present invention.
Detailed description of the invention
As it is shown in figure 1, a kind of electrode TIG bead-welding technology has steps of,
(1) before welding starts, according to selected material, determine that wlding is the need of preheating, welding current is 180A-350A, protective gas is argon, purity of argon 99.99%, when built-up welding starts, two tungsten electrodes of electrode TIG built-up welding, before and after entering in direction before welding, direction is arranged, it is easy to concentrate arc energy, two electric arcs close to each other are coupled into same electric arc, two tungsten electrodes of electrode TIG built-up welding, the pulse phase difference of the welding current of process is 180 °, welding gun head does not swings, wire feed at a slow speed, after setting 3-5 second transit time, welding bath is formed completely.
(2) welding gun head vertical welding direction swings, and the most there is not welding direction swing, quick wire feed, and advance along welding direction, during oscillating build-up welding, the swing width of welding gun is 5mm-20mm, and swing speed is 1000mm/min-3600mm/min.nullBy oscillating motion，Welding pool expanded range，Can the welding wire weight of deposition dramatically increase in unit interval，Welding quality can also be ensured simultaneously，Welding gun has the time of staying at the two ends extreme position swung，I.e. left side extreme position and right limit position，The time of staying of welding gun ibid one welding bead overlap joint side extreme position (right limit position) is more than the time of staying away from upper one welding bead side extreme position (left side extreme position)，The welding gun wire feed rate when the two ends extreme position swung stops is different，The wire feed rate of welding gun ibid one welding bead overlap joint side extreme position (right limit position) is more than the wire feed rate away from upper one welding bead side extreme position (left side extreme position)，Wire feed rate away from upper one welding bead side extreme position (left side extreme position) slows down，Make this position local surfacing layer thickness relatively thin，It is easy to overlap with next welding bead.
(3) when lopping continuous built-up welding lane-change overlaps, wire feed rate slows down, and wire feed rate amount of decrease herein is the biggest, welding gun stops swinging, and electric current reduces, after welding gun offsets, recover normal weld specification and swing, it is to avoid at lane-change, figuration of bead is bad, defect easily occurs.
On welding gun, the time of staying of one welding bead overlap joint side extreme position is 1.1～1.3 seconds；Welding gun away from time of staying of one welding bead side extreme position be 0.6～0.8 second.
Lane-change of the present invention, it is possible to being to weld at a circular flat, or weld at an annular workpieces inwall, welding track can be circular or straight.
Electrode TIG bead-welding technology of the present invention, is the process swinging efficient built-up welding based on double tungsten electrode TIG, and it has welding quality height, welding efficiency height, low cost, automaticity advantages of higher.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.
Claims (10)
1. an electrode TIG bead-welding technology, it is characterised in that:
When built-up welding starts, welding gun head does not swings, and after welding pool is formed completely, welding gun head vertical welding direction swings, and advances along welding direction, and when lopping continuous built-up welding lane-change overlaps, welding gun stops swinging, and after welding gun offsets, recovers normal and swings.
Electrode TIG bead-welding technology the most according to claim 1, it is characterized in that: during oscillating build-up welding, welding gun has the time of staying at the two ends extreme position swung, and the time of staying of welding gun ibid one welding bead overlap joint side extreme position is more than the time of staying away from upper one welding bead side extreme position.
Electrode TIG bead-welding technology the most according to claim 2, it is characterised in that:
During oscillating build-up welding, the welding gun wire feed rate when the two ends extreme position swung stops is different, and the wire feed rate of welding gun ibid one welding bead overlap joint side extreme position is more than the wire feed rate away from upper one welding bead side extreme position.
4. according to the electrode TIG bead-welding technology described in claim 1,2 or 3, it is characterised in that:
When welding welding-gun head does not swings, wire feed at a slow speed, when welding gun head carries out wobbling action, quick wire feed.
5. according to the electrode TIG bead-welding technology described in claim 1,2 or 3, it is characterised in that:
Two tungsten electrodes of electrode TIG built-up welding, before and after entering in direction before welding, direction is arranged.
6. according to the electrode TIG bead-welding technology described in claim 1,2 or 3, it is characterised in that:
Two tungsten electrodes of electrode TIG built-up welding, the pulse phase difference of the welding current of process is 180 °.
7. according to the electrode TIG bead-welding technology described in claim 1,2 or 3, it is characterised in that:
When lopping continuous built-up welding lane-change overlaps, wire feed rate slows down, and welding gun stops swinging, and electric current reduces, and after welding gun offsets, recovers normal weld specification and swing.
Electrode TIG bead-welding technology the most according to claim 2, it is characterised in that: on welding gun, the time of staying of one welding bead overlap joint side extreme position is 1.1～1.3 seconds；Welding gun away from time of staying of one welding bead side extreme position be 0.6～0.8 second.
9. according to the electrode TIG bead-welding technology described in claim 1,2 or 3, it is characterised in that:
After built-up welding is initial, after welding gun head is not rocked to form molten bath, the transit time that head starts to swing is 3 to 5 seconds.
Electrode TIG bead-welding technology the most according to claim 2, it is characterised in that: during oscillating build-up welding, the swing width of welding gun is 5mm-20mm, and swing speed is 1000mm/min-3600mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610223819.3A CN105817737B (en) | 2016-04-11 | 2016-04-11 | Electrode TIG bead-welding technology |
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| CN201610223819.3A CN105817737B (en) | 2016-04-11 | 2016-04-11 | Electrode TIG bead-welding technology |
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| CN105817737A true CN105817737A (en) | 2016-08-03 |
| CN105817737B CN105817737B (en) | 2019-03-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570978A (en) * | 2020-04-01 | 2020-08-25 | 中车青岛四方机车车辆股份有限公司 | Threaded hole thin-wall repair welding method |
| CN112894087A (en) * | 2021-01-20 | 2021-06-04 | 哈电集团（秦皇岛）重型装备有限公司 | Tube plate nickel-based alloy double-tungsten-electrode single-hot-wire automatic tungsten electrode argon arc welding surfacing process |
| CN114131146A (en) * | 2021-12-21 | 2022-03-04 | 一重集团大连核电石化有限公司 | Double-tungsten-electrode automatic welding control method and system |
| CN115365620A (en) * | 2022-08-08 | 2022-11-22 | 上海海隆石油管材研究所 | Titanium alloy drill rod joint wear-resistant belt surfacing process method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111570978A (en) * | 2020-04-01 | 2020-08-25 | 中车青岛四方机车车辆股份有限公司 | Threaded hole thin-wall repair welding method |
| CN111570978B (en) * | 2020-04-01 | 2021-10-01 | 中车青岛四方机车车辆股份有限公司 | Threaded hole thin-wall repair welding method |
| CN112894087A (en) * | 2021-01-20 | 2021-06-04 | 哈电集团（秦皇岛）重型装备有限公司 | Tube plate nickel-based alloy double-tungsten-electrode single-hot-wire automatic tungsten electrode argon arc welding surfacing process |
| CN114131146A (en) * | 2021-12-21 | 2022-03-04 | 一重集团大连核电石化有限公司 | Double-tungsten-electrode automatic welding control method and system |
| CN115365620A (en) * | 2022-08-08 | 2022-11-22 | 上海海隆石油管材研究所 | Titanium alloy drill rod joint wear-resistant belt surfacing process method |
| CN115365620B (en) * | 2022-08-08 | 2023-10-03 | 上海海隆石油管材研究所 | Surfacing process method for wear-resistant belt of titanium alloy drill rod joint |
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Address after: 116113 No.1-1, MianHuaDao Road, Ganjingzi District, Dalian City, Liaoning Province Co-patentee after: CHINA FIRST HEAVY INDUSTRIES Patentee after: Dalian nuclear power and Petrochemical Co., Ltd Address before: 116113 No. 1 cotton road, Dalian Bay, Ganjingzi District, Liaoning, Dalian Co-patentee before: CHINA FIRST HEAVY INDUSTRIES Patentee before: China First Heavy Machinery Group Dalian hydrogenation reactor Manufacturing Co.,Ltd. |
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