CN106825874B - A kind of submerged-arc welding single face welding and double face shaping technique - Google Patents
A kind of submerged-arc welding single face welding and double face shaping technique Download PDFInfo
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- CN106825874B CN106825874B CN201710147919.7A CN201710147919A CN106825874B CN 106825874 B CN106825874 B CN 106825874B CN 201710147919 A CN201710147919 A CN 201710147919A CN 106825874 B CN106825874 B CN 106825874B
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- welding
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- inner liner
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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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
- B23K9/188—Submerged-arc welding making use of a consumable electrodes making use of several electrodes
Abstract
The invention discloses a kind of submerged-arc welding single face welding and double face shaping techniques, comprising the following steps: carries out retaining wall on slope to base material, removes the impurity of the groove end face and its surrounding；The two groove docking are subjected to tubulation joint close, carry out tack welding at a certain distance at gap；Run-on tab identical with the mother metal thickness and end tab are increased separately at the gap both ends；It will be sent into inside tubing including the supporting element of inner liner and air bag, be close to the groove root, solder flux is paved with above the inner liner, injection gas is bonded the inner liner with the tubing in Xiang Suoshu air bag；The gap is carried out using the molten bath submerged-arc welding of dual power supply double-arc tournaments list to weld submerged-arc welding single face welding and double face shaping technique provided by the invention; eliminate semi-automatic gas shielded arc welding bottoming process; production procedure is shortened, reducing the non-penetration phenomenon of the root of weld ensure that weldquality.
Description
Technical field
The present invention relates to steel construction power industry steel pipes to manufacture welding field, more particularly to a kind of submerged-arc welding list
Weld double-side molding process in face.
Background technique
In pressed-steel pipe manufacturing industry, longitudinal seam welding quality requirement be full penetration first-order weld, steel pipe caliber Φ 275~
450mm, 6~12mm of wall thickness mostly use V-butt multi-pass welding；Such welding procedure the degree of automation is not high, need to generally have partly certainly
Two steps of gas shielded arc welding bottoming submerged-arc welding capping are moved to complete.This prevents submerged-arc welding from fully achieving brakingization, increases
Welding sequence, while also increasing the welding period.
Simultaneously during actual welding, weld defect often has in first road backing welding, the welding of road backing welding because headed by
Method is semi-automatic gas shielded arc welding and need to accomplish single face welding and double face shaping, strong to the welding technique requirement of worker, and is
Guarantee that single face welding and double face shaping is again natural to be welded using low current, therefore has slowed down speed of welding again.
There are productivities that low, at high cost and worker operation labor intensity is larger for existing operating procedure, and working efficiency is lower.
Summary of the invention
In view of the above problems, the present invention provides a kind of at low cost, welding quality stable and the submerged-arc weldings that work efficiency is high
Single face welding and double face shaping technique.
The present invention provides a kind of submerged-arc welding single face welding and double face shaping technique, comprising the following steps: carries out groove to base material and adds
Work removes the impurity of the groove end face and its surrounding；The two groove docking are subjected to tubulation joint close, every pre- at gap
Set a distance carries out tack welding；Run-on tab identical with the mother metal thickness and end tab are increased separately at the gap both ends；It will
It is sent into inside tubing including the supporting element of inner liner and air bag, is close to the groove root, is paved with above the inner liner
Solder flux, the interior injection gas of Xiang Suoshu air bag are bonded the inner liner with the tubing；Using dual power supply double-arc tournaments list molten bath
The gap is welded in submerged-arc welding.
Further, the dual power supply double-arc tournaments list molten bath submerged-arc welding, specifically: preceding road uses the low electric arc of big welding current
DC voltage；Road uses the big electric arc alternating current voltage of big welding current afterwards.
Further, when welding, preceding road gage of wire is 3.2mm, and electric current is 350~450A, and voltage is 28~29V；Road afterwards
Gage of wire is 4.0~5.0mm, and electric current is 420~480A, and voltage is 31~34V；Speed of welding is 360~380min/mm.
Further, when welding, for preceding road welding gun perpendicular to the gap, the rear road welding gun preceding road welding gun turns forward 10
~12 °, and front and back interelectrode distance is 17~19mm.
Preferably, the supporting element further includes bracket and supporting plate；The bracket is set to bottom end and is used for air bag described in support,
Including bottom plate and the side plate upwardly extended from the bottom plate two sides；The supporting plate be set to the air bag and the inner liner it
Between, for inner liner described in support.
Preferably, the inner liner be high temperature resistant liner, and can under the extruding of the air bag deformation occurs with the pipe
Material fitting.
Preferably, the inner liner includes main part and the side wall that extends downwardly from the main part two sides, the side wall
It is socketed on the outside of the side plate.
Preferably, the groove type is V-type, and 0~2mm of root face, bevel angle is 55~60 °；The two groove end faces
Between distance be not more than 1mm, unfitness of butt joint be not more than 1.5mm.
Preferably, the welding method of the tack welding is semi-automatic gas shielded arc welding, and spot pitch is that 300~500mm is equal
Even distribution.
Preferably, it after the gap is welded in the use dual power supply double-arc tournaments list molten bath submerged-arc welding, also wraps
It includes: removing the run-on tab and the end tab, and carry out welding quality inspection.
Compared with the existing technology, it is based on submerged-arc welding single face welding and double face shaping technique provided by the invention, it is double using dual power supply
Arc mariages list molten bath submerged-arc welding is welded: preceding road uses the low electric arc DC voltage of big welding current, gives full play to direct-current arc
Penetration power, obtain preferable fusion penetration effect；Road uses the big electric arc alternating current voltage of big welding current afterwards, increases molten wide, overcomes preceding road
The fusing metal accumulation that high current is likely to form, cooperation are welded at high speed, to form beautiful appearance of weld；Eliminate half certainly
Dynamic gas shielded arc welding bottoming process, shortens production procedure, reducing the non-penetration phenomenon of the root of weld ensure that weldquality.
The aspects of the invention or other aspects can more straightforwards in the following description.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the construction schematic diagram of an embodiment of the present invention submerged-arc welding single face welding and double face shaping technique；
Fig. 2 is the groove gap schematic diagram of an embodiment of the present invention submerged-arc welding single face welding and double face shaping technique.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The present invention provides a kind of submerged-arc welding single face welding and double face shaping technique, as one embodiment, such as Fig. 1 and Fig. 2, including
Following steps:
Groove 11 is processed: being carried out groove 11 according to the thickness d 2 of base material 1 and is processed, 11 form of groove is V-type, root face 0
~2mm, the bevel angle α are 55~60 °.
Polishing connector: 11 end face of groove and surrounding impurity are removed；Specifically available abrasive machine is to two slopes
Polishing removing iron rust and oxide skin are carried out within the scope of 11 end faces of mouth and 20mm.
It is assembled: two docking of groove 11 to be subjected to tubulation joint close, so that the two 11 end distance between the surface d3 of groove are little
It is not more than 1.5mm in 1mm, unfitness of butt joint d4.
Tack welding: it using the welding method of semi-automatic gas shielded arc welding, is positioned at gap 10 every preset distance
Weldering；Tack weld (not shown) thickness is no less than 3mm, and length is no less than 40mm, and it is uniform that its spacing should be 300~500mm
Distribution, welding wire used must match with the base material 1.
Increase run-on tab (not shown) and end tab (not shown): being increased separately and the base material at 10 both ends of gap
The identical run-on tab of 1 thickness d 2 and end tab, specification are 100mm × 60mm.
It places supporting element 2: will include that inner liner 21 and the supporting element 2 of air bag 22 are sent into inside tubing, be close to the groove
11 roots are paved with solder flux 4, injection in starting air compressor (not shown) Xiang Suoshu air bag 22 in the top of the inner liner 21
Gas is bonded the inner liner 21 with the tubing.Preferably, the supporting element 2 further includes bracket 24 and supporting plate 23；It is described
Bracket 24 is set to bottom end for air bag 22 described in support, upwardly extends including bottom plate (not shown) and from the bottom plate two sides
Side plate (not shown)；The supporting plate 23 is set between the air bag 22 and the inner liner 21, for inner liner described in support
21.The inner liner 21 is high temperature resistant liner, and can deformation occurs is bonded with the tubing under the extruding of the air bag 22.Institute
State the side wall (not shown) that inner liner 21 includes main part (not shown) and extends downwardly from the main part two sides, the side wall
It is socketed on the outside of the side plate.
Welding: being welded using dual power supply double-arc tournaments list molten bath submerged-arc welding, and preceding road uses the low electric arc of big welding current
DC voltage；Road uses the big electric arc alternating current voltage of relatively small welding current afterwards.
Welding is completed, and is tested: examining whether weld seam has rosin joint solder skip, if there is rosin joint solder skip also needs to carry out repair welding；
It had checked whether to weld or weld impurity attachment simultaneously, polish if necessary.
As one embodiment, when welding, preceding road welding gun 31 is perpendicular to the gap 10, the rear preceding road of road welding gun 32
Welding gun turns forward 10~12 °, and front and back interelectrode distance d1 is 17~19mm.
As one embodiment, it is 3.2mm that welding parameter proportion, which is preceding road welding wire (not shown) diameter, when welding, and electric current is
350~450A, voltage are 28~29V, and speed of welding is 360~380min/mm；Afterwards road welding wire (not shown) diameter be 4.0~
5.0mm, electric current are 420~480A, and voltage is 31~34V；Speed of welding is 360~380min/mm.
Compared with prior art, submerged-arc welding single face welding and double face shaping technique of the present invention has the advantage that
(1) semi-automatic gas shielded arc welding bottoming process is eliminated, reducing the non-penetration phenomenon of the root of weld ensure that weld seam
Quality, while also production procedure is shortened because reducing one of bottoming process in production.
(2) it carries out welding 2.5 times that its welding efficiency is monofilament submerged-arc welding using double wire hidden arc welding, to a certain extent
Improving welding efficiency reduces the labor intensity of welder.
(3) preceding road uses the low electric arc DC voltage of big welding current, gives full play to the penetration power of direct-current arc, obtains preferable
Fusion penetration effect；Road uses the big electric arc alternating current voltage of big welding current afterwards, increases molten wide, overcomes preceding road high current to be likely to form molten
Change metal accumulation, cooperation is welded at high speed, to form beautiful appearance of weld.
A kind of process of submerged-arc welding single face welding and double face shaping technique provided by the present invention is described in detail above, it is right
In those of ordinary skill in the art, thought according to an embodiment of the present invention can in specific embodiments and applications
There is change place, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (6)
1. a kind of submerged-arc welding single face welding and double face shaping technique, comprising the following steps:
Retaining wall on slope is carried out to base material, removes the impurity of the groove end face and its surrounding；
The two groove docking are subjected to tubulation joint close, carry out tack welding every preset distance at gap；
Run-on tab identical with the mother metal thickness and end tab are increased separately at the gap both ends；
It will be sent into inside tubing including the supporting element of inner liner and air bag, be close to the groove root, in the upper of the inner liner
Side is paved with solder flux, and injection gas is bonded the inner liner with the tubing in Xiang Suoshu air bag；
The gap is welded using dual power supply double-arc tournaments list molten bath submerged-arc welding；The dual power supply double-arc tournaments list molten bath
Submerged-arc welding, specifically: preceding road uses the low electric arc DC voltage of larger welding current；Road uses the big electric arc alternating current of big welding current afterwards
Voltage；
The supporting element further includes bracket and supporting plate；
The bracket is set to bottom end for air bag described in support, including bottom plate and the side upwardly extended from the bottom plate two sides
Plate；
The supporting plate is set between the air bag and the inner liner, for inner liner described in support；
The inner liner includes main part and the side wall that extends downwardly from the main part two sides, and the side wall is socketed on the side
The outside of plate；
When welding, preceding road gage of wire is 3.2mm, and electric current is 350~450A, and voltage is 28~29V；Road gage of wire is afterwards
4.0~5.0mm, electric current are 420~480A, and voltage is 31~34V；Speed of welding is 360~380mm/min.
2. submerged-arc welding single face welding and double face shaping technique according to claim 1, it is characterised in that: when welding, preceding road welding gun
Perpendicular to the gap, the rear road welding gun preceding road welding gun turns forward 10~12 °, and front and back interelectrode distance be 17~
19mm。
3. submerged-arc welding single face welding and double face shaping technique according to claim 1, it is characterised in that: the inner liner is resistance to height
Temperature liner, and can deformation occurs is bonded with the tubing under the extruding of the air bag.
4. submerged-arc welding single face welding and double face shaping technique according to claim 1, it is characterised in that: the groove type is V
Type, 0~2mm of root face, bevel angle are 55~60 °；The two bevel end distance between the surface are not more than 1mm, and unfitness of butt joint is not more than
1.5mm。
5. submerged-arc welding single face welding and double face shaping technique according to claim 1, it is characterised in that: the welding of the tack welding
Method is semi-automatic gas shielded arc welding, and spot pitch is that 300~500mm is uniformly distributed.
6. submerged-arc welding single face welding and double face shaping technique according to claim 1 uses dual power supply double-arc tournaments list described
After the gap is welded in molten bath submerged-arc welding, further includes: remove the run-on tab and the end tab, and carry out welding matter
Amount checks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710147919.7A CN106825874B (en) | 2017-03-10 | 2017-03-10 | A kind of submerged-arc welding single face welding and double face shaping technique |
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| CN201710147919.7A CN106825874B (en) | 2017-03-10 | 2017-03-10 | A kind of submerged-arc welding single face welding and double face shaping technique |
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| CN106825874B true CN106825874B (en) | 2019-11-26 |
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| CN107081535B (en) * | 2017-07-03 | 2019-05-03 | 西京学院 | A kind of steel pipe grafting connector improving structural strength |
| CN108311814B (en) * | 2017-09-15 | 2020-04-21 | 上海江南长兴造船有限责任公司 | Welding material composition for single-side submerged arc automatic welding of soft gasket |
| CN107717189B (en) * | 2017-09-30 | 2023-12-26 | 上海振华重工(集团)股份有限公司 | Three-wire welding gun and multi-wire submerged arc welding method |
| CN108465918A (en) * | 2018-06-01 | 2018-08-31 | 江阴市三和重工钢制品有限公司 | The butt-joint process of different wall thickness steel pipe |
| CN108788411A (en) * | 2018-07-02 | 2018-11-13 | 中国电建集团核电工程有限公司 | Back chipping welding procedure is exempted from medium plate splicing |
| CN110315158A (en) * | 2019-06-28 | 2019-10-11 | 中国二十二冶集团有限公司 | Electrolytic cell bottom plate square groove splicing welding method |
| CN111230265A (en) * | 2020-02-25 | 2020-06-05 | 重庆川东船舶重工有限责任公司 | Single-side forming welding method for aluminum alloy gasket |
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| CN201579528U (en) * | 2009-12-11 | 2010-09-15 | 河北华油钢管设计研究院有限公司 | Flexible flux backing |
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