CN107598379A - A kind of slab double-sided laser MIG composite weldings and MIG cover welding new methods - Google Patents
A kind of slab double-sided laser MIG composite weldings and MIG cover welding new methods Download PDFInfo
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- CN107598379A CN107598379A CN201710892908.1A CN201710892908A CN107598379A CN 107598379 A CN107598379 A CN 107598379A CN 201710892908 A CN201710892908 A CN 201710892908A CN 107598379 A CN107598379 A CN 107598379A
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Abstract
The invention discloses a kind of slab double-sided laser MIG composite weldings and MIG cover welding new methods, comprise the following steps：The field trash and oxide-film of step 1, simple process slab root face to be welded；Step 2, use front progress first welding of the laser to slab；Step 3, slab overturn and fixed, use laser to carry out second welding to the reverse side of slab；Step 4, laser is removed, welding capping is carried out to the face of weld obtained by step 2 and step 3 using MIG welderings.A kind of slab double-sided laser MIG composite weldings and MIG cover welding new methods of the present invention, the preparation before welding is enormously simplify, simplify complicated welding procedure as far as possible, improve production efficiency；Improve appearance of weld, avoid and eliminate weld defect, eliminate stomata, improve the quality and intensity of welding point, the thickness of slab for being applicable welding is bigger.
Description
Technical field
The present invention relates to material processing field, more particularly to a kind of slab double-sided laser MIG composite weldings and MIG cappings
Weld new method.
Background technology
Thick plates are in engineering with universal, such as ship, pipeline, pressure vessel.The difficult point of thick plates is
The section of its big thickness can not possibly disposably penetrate, it is therefore desirable to multi-pass welding.It consequently leads to complicated and trifling groove
Processing and preparation；Back chipping and polishing in welding process, cause the reduction of welding efficiency and the deterioration of mechanical property.
Thick plates mainly have following three implementations at present, are submerged-arc welding (submerged arc respectively
Welding, SAW), gas metal-arc welding (gas metal arc welding, GMAW), Laser Welding (laser beam
Welding, LBW) and laser-arc hybrid welding process (hybrid laser-arc welding, HLAW).
1. submerged-arc welding.Submerged-arc welding is that a kind of electric arc burns the method welded under welding flux layer.Sheet material needs to be processed as
K-type groove, also want the gap between control panel.Thermal weld stress is big, and property of welded joint declines.
2. gas metal-arc welding.Gas metal-arc welding is to make thermal source using caused electric arc between welding wire and workpiece
By the welding method of metal molten.The X-type groove of processed complex is needed before welding, to be polished before weldering, first of postwelding is clear
Root.Alternately welding six is needed to complete the connection of two boards.
3. Laser Welding.Laser Welding is that heat caused by bombardment weldment is welded using the laser beam of focusing as the energy
A kind of welding method of high-efficiency and precision.By the optimization of laser power and speed of welding, can make multiple material such as mild steel,
The moderately thick of low-alloy high-strength steel, aluminium alloy, titanium alloy, nickel-base alloy etc. successfully realizes that laser single track penetration welds, welding
Thickness reaches 20mm.But laser welding is splashed greatly, and it is a kind of welding method without packing material.In thick plates,
Laser power is general all very big, further increases the generation of splashing.Therefore shaping surface is general all poor during slab laser welding.
And during laser deep penetration welding, caving in for keyhole easily causes the generation of stomata.Reduce the mechanical property of joint.
4. hybrid Laser-Arc Welding.Hybrid Laser-Arc Welding is that one kind combines two independent thermal sources of laser and electric arc
The new method welded.The advantages of it combines both, and the shortcomings that avoid both.Such as the laser of high-energy-density
Beam can realize big fusion penetration, and electric arc can fill metal material, improve appearance of weld.But due to laser and electric arc
Coupling is complicated, it is necessary to which the technological parameter of regulation and control is numerous, therefore welding process is splashed also very greatly, and appearance of weld is worse, holds
Undercut is also easy to produce, is not filled by, the defects of hump.Also tend to easily produce stomata in weld seam.It is for example, compound by laser-arc
Welding method welding aluminum alloy, appearance of weld extreme difference, root produce it is serious sagging, section of weld joint there is also size very
Big stomata, ultimately result in significantly reducing for tensile strength.
Thick plates mainly have four kinds of methods of the above at present.Although they can reach thick plates to a certain extent
Purpose, but its shortcoming is fairly obvious, such as heavy complicated, the welding procedure complexity of the preparation of test plate (panel), welding efficiency bottom
Under, obtained welding point defect is more, low intensity.
Therefore, those skilled in the art is directed to developing a kind of slab double-sided laser MIG composite weldings and MIG cappings
New method is welded, enormously simplify the preparation before welding, simplifies complicated welding procedure as far as possible, improves production efficiency；Change
Kind appearance of weld, avoids and eliminates weld defect, eliminates stomata, improves the quality and intensity of welding point, is applicable the plate of welding
It is thick bigger.
The content of the invention
In view of the drawbacks described above of prior art, the technical problems to be solved by the invention, which are that a kind of slab of exploitation is two-sided, to swash
Light MIG composite weldings and MIG cover welding new methods, the preparation before welding is enormously simplify, simplify complicated weldering as far as possible
Technique is connect, improves production efficiency；Improve appearance of weld, avoid and eliminate weld defect, eliminate stomata, improve welding point
Quality and intensity, the thickness of slab for being applicable welding are bigger.
To achieve the above object, the invention provides a kind of slab double-sided laser MIG composite weldings and MIG cover weldings
New method, comprise the following steps：
The field trash and oxide-film of step 1, simple process slab root face to be welded；
Step 2, use front progress first welding of the laser to slab；
Step 3, slab overturn and fixed, use laser to carry out second welding to the reverse side of slab；
Step 4, laser is removed, welding lid is carried out to the face of weld obtained by step 2 and step 3 using MIG welderings
Face.
Further, step 1 also includes, and simply cleans slab one to twice with alcohol or acetone as needed.
Further, the field trash and oxide-film of slab are simply cleared up using wire brush.
Further, laser is preferably IPG optical fiber lasers, and laser power is arranged to 10kw, and speed of welding is set
It is set to 0.6m/min.
Further, bonding power source is preferably Fronius TransPuls Synergic 5000CMT, and robot is excellent
Elect KUKA KR60HA as.
Further, the welding bead in step 2 obtained by first of welding and the weldering obtained by second welding in step 3
Road at least 2mm's is overlapping.
Further, the thickness of slab is arranged to 20mm-40mm.
Further, the thickness of slab is preferably 30mm.
Further, the welding parameter of the MIG welderings in step 4 is arranged to welding current：136A；Speed of welding：
0.6m/min。
Technique effect
1st, the preparation before welding is greatly simplified, simplifies complicated welding procedure as far as possible, is greatly enhanced production efficiency；
2nd, improve appearance of weld, avoid and eliminates weld defect, eliminate stomata, improve as far as possible the quality of welding point with
Intensity；
3rd, new welding method is proposed so that the thickness of slab for being applicable welding is bigger.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is a kind of slab double-sided laser MIG composite weldings and MIG cosmetic weldings of the preferred embodiment of the present invention
Connect the schematic diagram of new method.
Embodiment
As shown in figure 1, the preferred embodiment of the present invention provides a kind of slab double-sided laser MIG composite weldings and MIG
Cover welding new method, comprises the following steps：
The field trash and oxide-film of step 1, simple process slab root face to be welded；
Step 2, use front progress first welding of the laser 1 to slab；
Step 3, slab overturn and fixed, use laser to carry out second welding to the reverse side of slab；
Step 4, laser is removed, welding lid is carried out to the face of weld obtained by step 2 and step 3 using MIG welderings
Face.
Specifically, in the present embodiment, the thickness of slab used is 30mm.In order to simplify the preparation before welding, welding as far as possible
Before need not be to test plate (panel) finished edge to be welded, also without staying gap during welding, the folder in step 1 using wire brush to slab
Debris and oxide-film are simply cleared up.In addition, slab one is simply cleaned to twice with alcohol or acetone as needed.
As indicated with 1, in step 2 and step 3, laser power is arranged to 10kw, and speed of welding is arranged to 0.6m/
min.Specifically, in the preferred embodiment of the present invention, laser 1 is preferably IPG optical fiber lasers, and peak power output is
10kW.Bonding power source is Fronius TransPuls Synergic 5000CMT.Welding robot 2 is KUKA
KR60HA.The conventional industrial laser maximum laser power of welding is very limited at present, therefore, in order in limited laser
It can increase solderable thickness of slab as far as possible under the limitation of power, it is proposed that new method of the invention：First pass through laser-arc hybrid welding process
Method front welding first, then plate overturn and fixed, then reverse side welding second.It is worth noting that, it is
Plate is effectively connected, should ensure that two welding bead at least 2mm's is overlapping.Moreover, due to first during two-sided welding
Road can not possibly penetrate whole test plate (panel), therefore can be effectively prevented from the defects of root is sagging.
In hybrid Laser-Arc Welding, speed of welding has a significant impact to weld penetration.In thick plates, it is desirable to
Fusion penetration as big as possible is obtained, therefore speed of welding is unsuitable too fast.On the premise of welding stability is ensured, it should slow down in right amount
Speed of welding.In addition, speed of welding is too fast, welding process can be caused unstable, keyhole caves in frequent generation, many bubble quilts
It is trapped in below molten bath, the bubble in welding pool overflows without the time of abundance, can cause exist very in the weld seam of postwelding solidification
More stomatas.And have overlapping between two welding beads, it ensure that complete fusion and the good connection of welding line joint.When modulation process is joined
Number and speed of welding, when especially speed of welding is slower, the bubble in keyhole has time enough up to run, and is finally solidified
Weld metal bottle up.Also laid a good foundation for the follow-up stomata that is completely eliminated.Further, since the presence of splashing etc., weld seam
Shaping surface be poor.
It would therefore be desirable to adjust face of weld with step 4.Obtained by the two-sided welding method of step 2 and step 3
To welding point be although connected, but there are many spileholes in its face of weld, and face of weld, which generally exists, to be stung
Side, it is not filled by waiting weld defect.And undercut and surface defect is belonged to the defects of be not filled by, but fortunately, all stomatas
All it is set to be only present in welding bead surface by the control of welding procedure.Therefore, provide and adopt in a preferred embodiment of the invention
The method that stomata is eliminated with electric arc capping.Arc Welding Process is mature and stable, as long as reasonable selection welding procedure, resulting
Face of weld is bright clean and tidy, the defects of in the absence of undercut.Arc welding can be by the refuse of welding bead surface, therefore is present in welding bead
Surface, the bubble being closed is dissolved, and flow in buoyancy and molten bath etc. gradually flee from liquid metal under factor effect and
Get into the air, after weld metal solidifies, all stomatas just disappear.Therefore, the method for arc welding capping is passed through
The defects of inhibiting surface simultaneously, and eliminate the weld blowhole that welding by both sides leaves.Wherein, the welding of the MIG welderings in step 4
Parameter is arranged to welding current：136A；Speed of welding：0.6m/min.
In another preferred embodiment of the present invention, the thickness of slab is arranged to 20mm-40mm.The thickness of slab is preferred
For 30mm.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel can be obtained by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (9)
1. a kind of slab double-sided laser MIG composite weldings and MIG cover welding new methods, it is characterised in that comprise the following steps：
The field trash and oxide-film of step 1, simple process slab root face to be welded；
Step 2, use front progress first welding of the laser to the slab；
Step 3, the slab overturn and fixed, use the laser to carry out second welding to the reverse side of the slab；
Step 4, laser is removed, the face of weld obtained by the step 2 and the step 3 is welded using MIG welderings
Capping.
2. a kind of slab double-sided laser MIG composite weldings as claimed in claim 1 and MIG cover welding new methods, its feature
It is, the step 1 also includes, and simply cleans the slab one to twice with alcohol or acetone as needed.
3. a kind of slab double-sided laser MIG composite weldings as claimed in claim 2 and MIG cover welding new methods, its feature
It is, the field trash and oxide-film of the slab is simply cleared up using wire brush.
4. a kind of slab double-sided laser MIG composite weldings as claimed in claim 1 and MIG cover welding new methods, its feature
It is, the laser is preferably IPG optical fiber lasers, and laser power is arranged to 10kw, and speed of welding is arranged to 0.6m/
min。
5. a kind of slab double-sided laser MIG composite weldings as claimed in claim 4 and MIG cover welding new methods, its feature
It is, the bonding power source is preferably the CMT of Fronius TransPuls Synergic 5000, and robot is preferably KUKA
KR60HA。
6. a kind of slab double-sided laser MIG composite weldings as claimed in claim 1 and MIG cover welding new methods, its feature
It is, the welding bead resulting with second welding in the step 3 of the welding bead in the step 2 obtained by first of welding is at least
Have that 2mm's is overlapping.
7. a kind of slab double-sided laser MIG composite weldings as claimed in claim 1 and MIG cover welding new methods, its feature
It is, the thickness of the slab is arranged to 20mm-40mm.
8. a kind of slab double-sided laser MIG composite weldings as claimed in claim 7 and MIG cover welding new methods, its feature
It is, the thickness of the slab is preferably 30mm.
9. a kind of slab double-sided laser MIG composite weldings as claimed in claim 1 and MIG cover welding new methods, its feature
It is, the welding parameter of the MIG welderings in the step 4 is arranged to：Welding current：136A；Speed of welding：0.6m/
min。
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Cited By (4)
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| CN110091066A (en) * | 2019-04-26 | 2019-08-06 | 中国兵器科学研究院宁波分院 | A kind of laser-arc hybrid welding in industry method of titanium alloy |
| CN110153531A (en) * | 2018-02-11 | 2019-08-23 | 上海海立电器有限公司 | A kind of two-sided welding method and two-sided welding product |
| CN112453707A (en) * | 2020-11-18 | 2021-03-09 | 上海中船临港船舶装备有限公司 | Method for welding thick plate of ship on single surface |
| CN114559161A (en) * | 2022-03-15 | 2022-05-31 | 贵州航天天马机电科技有限公司 | Laser and TIG (tungsten inert gas) hybrid welding method for welding pure titanium and titanium alloy |
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| CN112453707A (en) * | 2020-11-18 | 2021-03-09 | 上海中船临港船舶装备有限公司 | Method for welding thick plate of ship on single surface |
| CN114559161A (en) * | 2022-03-15 | 2022-05-31 | 贵州航天天马机电科技有限公司 | Laser and TIG (tungsten inert gas) hybrid welding method for welding pure titanium and titanium alloy |
| CN114559161B (en) * | 2022-03-15 | 2023-05-12 | 贵州航天天马机电科技有限公司 | Laser and TIG composite welding method for welding pure titanium and titanium alloy |
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