CN109822218A - A kind of welding procedure carrying out aluminum alloy T type weld seam using double beams laser - Google Patents
A kind of welding procedure carrying out aluminum alloy T type weld seam using double beams laser Download PDFInfo
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- CN109822218A CN109822218A CN201910231796.4A CN201910231796A CN109822218A CN 109822218 A CN109822218 A CN 109822218A CN 201910231796 A CN201910231796 A CN 201910231796A CN 109822218 A CN109822218 A CN 109822218A
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Abstract
The present invention relates to metal welding techniques fields; the present invention proposes a kind of welding procedure that aluminum alloy T type weld seam is carried out using double beams laser, includes the following steps: that 1) welding base metal selects 6061 aluminium alloy plates, gage of wire is 4043 welding wires of 1.2mm; protection gas is argon gas, purity 99.99%；2) surface of aluminum plate is polished with the sand paper of 800 mesh and 2000 mesh respectively, then to pickling after above-mentioned processed aluminium sheet elder generation alkali cleaning, and with alcohol wipe, then is dried；3) aluminium sheet is placed on face contact fixture, is fixed mask and stringer using T-type weld seam special fixture；4) Double laser beam welding, welding condition: wire feed rate 3-5m/min are carried out using continuous laser mode；30-35 ° of laser head inclination angle；Hot spot and distance between weldingwires 1-2mm；Shield gas flow rate 16-20L/min；Laser power 2500-3000W；Dry extension of electrode 7-10mm；20-25 ° of wire feed angle；Protect 20-25 ° of air horn degree；5) postwelding is examined and is analyzed.
Description
Technical field
The present invention relates to metal welding techniques field more particularly to it is a kind of utilize double beams laser carry out the weldering of aluminum alloy T type
The welding procedure of seam.
Background technique
Due to light weight, the high and higher corrosion resistance of intensity, excellent machining property, aluminium alloy is widely applied
In space flight, aviation and automobile industry.Compared to the welding aluminum alloy with other metals since thermal conductivity is good, thermal expansion coefficient is big, lead
Cause aluminum alloy piping welding structural member that can generate biggish deflection, the relatively coarse mechanical property aspect of crystal grain is bad and there are stomatas etc.
Welding defect, and since the welding of the properties such as oxidation therefore aluminium alloy on the oxidation film on surface and easy hair also becomes pass gradually
The emphasis of note.
High by its energy density compared to other kinds of welding method laser welding, higher penetrability is lesser
Welding pool bring high manufacturing accuracy and stronger adaptability, more and more applied automobile, shipbuilding, aerospace,
Retrofit etc..Therefore Laser Welding of Aluminum Alloys becomes new aluminum alloy piping welding direction.
Laser weld energy density is high, and welding precision is high, and heat affected area is small, and workpiece shrinks and deforms small, and postwelding remnants are answered
Power is low and postwelding processing capacity is few, being easily integrated of welding process, automation, flexibility, is high speed, high-precision, efficient weldering
Connect method.
Laser be using stimulated radiation principle, generation it is a kind of high with monochromaticjty, coherence, directionality and brightness
Light beam.And laser welding is then using this light beam as heat source and to act on test specimen to be welded, to reach fusing and connect examination
The purpose of part.Relative to traditional welding method, laser welding have the advantages that it is more, it is specific as follows:
1. the laser after focusing has high power density (about 105W/cm2-107W/cm2), welding in a manner of melting deeply
It carrying out, since laser heated perimeter is minimum, under the conditions of Same Efficieney and throat thickness, has speed of welding high, heat input is small,
The features such as heat affected area is small, and welding stress and distortion is small.
2. can weld more at a distance, it is suitable for the welding of some miniature parts and the very poor position of accessibility.
3. optical fiber can be pulled to multiple seats in the plane by laser, the effect of a tractor serves several purposes is realized.It can also after welding
To be cut by changing laser parameter, the operation such as rapid shaping or punching.
4. can be operated in enclosed environment, suitable for oxidizable and toxic metal.
5. the material and nonmetallic materials that certain conventional methods are difficult to solder to can be welded.
Dual-beam laser welding is that beam of laser is either divided into the independent laser of two beams to by optical spectroscopic system
Two beams act on the technology that welding section is welded.When dual-beam laser welding, the biggish molten bath of an opening and keyhole are formed,
For the stability of keyhole compared with single beam height, i.e. welding process high stability, this is conducive to the escape of gas in keyhole, reduces weldering
The porosity of seam, the forming of final weld seam are also good compared with single beam.
Dual-beam laser welding is used not only for welding high-carbon steel, unequal thickness plate material, in aluminium alloy and titanium alloy welding
In also have very big advantage, when double light beam laser acts in a molten bath, a biggish molten bath and keyhole can be formed,
The stability of keyhole is kept, improves appearance of weld, and the mobility in molten bath can be improved, is conducive to the floating of air entrapment,
Reduce stomata.Since dual-beam welding needs the operation simultaneously of two lasers, or dedicated beam splitting system, this respect is ground at home
Study carefully also seldom and relative to traditional T-type weld seam single-sided welding, laser double-surface, which welds to have simultaneously, reduces the excellent of T welded unit deformation
Point and component both sides are welded simultaneously more to be saved the time and shortens the construction period and improve efficiency save the cost.Since both sides respectively have one
Heat source, which weld between component, will form hot-fluid agitation two heat sources in therefore weld seam molten bath so that originally coarse weld seam is brilliant
Grain tinyization improves weldquality.
Summary of the invention
The object of the present invention is to provide a kind of welding procedures that aluminum alloy T type weld seam is carried out using double beams laser.
Above-mentioned technical purpose of the invention is that used following technical scheme is realized:
A kind of welding procedure being carried out aluminum alloy T type weld seam using double beams laser, is included the following steps:
1) welding base metal selects 6061 aluminium alloy plates, and gage of wire is 4043 welding wires of 1.2mm, and protection gas is argon gas, pure
Degree is 99.99%；
2) surface of aluminum plate is polished with the sand paper of 800 mesh and 2000 mesh respectively, then to above-mentioned processed aluminium sheet elder generation alkali
It washes rear pickling, and with alcohol wipe, then dries；
3) aluminium sheet is placed on face contact fixture, is fixed mask and stringer using T-type weld seam special fixture；
4) Double laser beam welding, welding condition: wire feed rate 3-5m/min are carried out using continuous laser mode；Laser
30-35 ° of inclination angle of head；Hot spot and distance between weldingwires 1-2mm；Shield gas flow rate 16-20L/min；Laser power 2500-3000W；Weldering
Silk stem elongation 7-10mm；20-25 ° of wire feed angle；Protect 20-25 ° of air horn degree；
5) postwelding is examined and analysis, postwelding test including for inspection to the continuity of weld seam, whether there is or not sting to appearance of weld
The defects of side penetrates, carrying out Mechanics Performance Testing to T-type weld seam includes hardness and tensile property.
Further, in step 3), make weld seam verticality and stringer in mask interposition using T-type weld seam special fixture
The offset set is less than 90%.
Further, wherein T-type weld seam backplane specifications are 100 × 80 × 2mm, the floor specification of T-type weld seam is 100 ×
50×2mm。
In conclusion the invention has the following advantages:
It is proposed of the invention solves that aluminum alloy T type weld joint welding process is difficult, deformation is excessive, provides the reduction of appearance of weld rate
Weld interval has effectively saved production cost, improves production efficiency.
Detailed description of the invention
Fig. 1 is welding schematic diagram.
Fig. 2 is the main view for welding schematic diagram.
Fig. 3 is the top view for welding schematic diagram.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Diagram and specific embodiment are closed, the present invention is further explained.
The method that the present invention is welded simultaneously using two sides double beams laser, strict control laser power and laser angle, prevent
Since the influence of laser power and incident angle leads to the generation of defect in welding process.
Embodiment one:
A kind of welding procedure using Double laser beam welding aluminum alloy T-type weld seam, includes the following steps:
1) welding base metal selects 6061 aluminium alloys, and T-type weld seam backplane specifications are 100 × 80 × 2mm, the floor of T-type weld seam
Specification is 100 × 50 × 2mm, and gage of wire is 4043 welding wires of 1.2mm, and protection gas is that argon gas (Ar) purity is 99.99%；
2) base material surface is polished with the sand paper of 800 mesh and 2000 mesh respectively, then to above-mentioned processed aluminium sheet elder generation alkali
Wash rear pickling, and with alcohol wipe, hair dryer drying is spare；
3) mask and stringer are fixed using T-type weld seam special fixture, by using special T-type weld seam special fixture institute
Referred to that can ensure that the offset of weld seam verticality and stringer in mask middle position is both less than the technology that 90% meets T-type weld seam
Mark；
4) Double laser beam welding, wire feed rate 5m/min are carried out using continuous laser mode；Laser angle is 30 °；It send
Silk angle is 20 °；Dry extension of electrode is 7mm；Protection air-flow amount is that 18L/min laser power is 2500W；Optical fiber spacing is 1mm.
It is welded under this technique, the defects of no undercut, burn-through, grain size compound meets the requirements, and it is stretched,
Its mechanical property known to hardness determination also complies with requirement.
Embodiment two:
A kind of welding procedure using Double laser beam welding aluminum alloy T-type weld seam, includes the following steps:
1) welding base metal selects 6061 aluminium alloys, and T-type weld seam backplane specifications are 100 × 80 × 2mm, the floor of T-type weld seam
Specification is 100 × 50 × 2mm, and gage of wire is 4043 welding wires of 1.2mm, and protection gas is that argon gas (Ar) purity is 99.99%；
2) base material surface is polished with the sand paper of 800 mesh and 2000 mesh respectively, then to above-mentioned processed aluminium sheet elder generation alkali
Wash rear pickling, and with alcohol wipe, hair dryer drying is spare；
3) mask and stringer are fixed using T-type weld seam special fixture, by using special T-type weld seam special fixture institute
Referred to that can ensure that the offset of weld seam verticality and stringer in mask middle position is both less than the technology that 90% meets T-type weld seam
Mark；
4) Double laser beam welding, wire feed rate 4m/min are carried out using continuous laser mode；Laser angle is 35 °；It send
Silk angle is 22 °；Dry extension of electrode is 10mm；Protection air-flow amount is that 20L/min laser power is 3000W；Optical fiber spacing is
2mm。
It is welded under this technique, the defects of no undercut, burn-through, grain size compound meets the requirements, and it is stretched,
Its mechanical property known to hardness determination also complies with requirement.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (3)
1. a kind of welding procedure for carrying out aluminum alloy T type weld seam using double beams laser, which comprises the steps of:
1) welding base metal selects 6061 aluminium alloy plates, and gage of wire is 4043 welding wires of 1.2mm, and protection gas is argon gas, and purity is
99.99%；
2) surface of aluminum plate is polished with the sand paper of 800 mesh and 2000 mesh respectively, then to above-mentioned processed aluminium sheet elder generation alkali cleaning after
Pickling, and with alcohol wipe, then dry；
3) aluminium sheet is placed on face contact fixture, is fixed mask and stringer using T-type weld seam special fixture；
4) Double laser beam welding, welding condition: wire feed rate 3-5m/min are carried out using continuous laser mode；Laser head inclines
30-35 ° of angle；Hot spot and distance between weldingwires 1-2mm；Shield gas flow rate 16-20L/min；Laser power 2500-3000W；Welding wire is dry
Extend 7-10mm；20-25 ° of wire feed angle；Protect 20-25 ° of air horn degree；
5) postwelding is examined and analysis, postwelding test including inspection is to the continuity of weld seam, and whether there is or not undercut welderings to appearance of weld
The defects of saturating, carrying out Mechanics Performance Testing to T-type weld seam includes hardness and tensile property.
2. a kind of welding procedure for being carried out aluminum alloy T type weld seam using double beams laser according to claim 1, feature are existed
In: in step 3), using T-type weld seam special fixture weld seam verticality and stringer are less than in the offset in mask middle position
90%.
3. a kind of welding procedure for being carried out aluminum alloy T type weld seam using double beams laser according to claim 1, feature are existed
In: where T-type weld seam backplane specifications are 100 × 80 × 2mm, and the floor specification of T-type weld seam is 100 × 50 × 2mm.
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Cited By (10)
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| CN110524107A (en) * | 2019-08-15 | 2019-12-03 | 上海交通大学 | A method of improving aluminum steel dissimilar metal laser welding-brazing lap joint intensity |
| CN111203639A (en) * | 2020-01-16 | 2020-05-29 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding filler wire molten drop transition monitoring system and method based on high-speed camera shooting |
| CN111545908A (en) * | 2020-05-13 | 2020-08-18 | 南京航空航天大学 | Double-laser-beam bilateral welding device and method for T-shaped structure of additive manufacturing part |
| CN111604595A (en) * | 2020-06-09 | 2020-09-01 | 华北水利水电大学 | T-shaped joint double-beam laser wire-filling welding method capable of reducing porosity of welding seam |
| CN111822856A (en) * | 2020-06-10 | 2020-10-27 | 南京航空航天大学 | Ultrasonic vibration assisted double-laser-beam bilateral synchronous wire filling welding device and method for T-shaped joint |
| CN112475602A (en) * | 2020-11-13 | 2021-03-12 | 哈尔滨工业大学 | Method for eliminating laser welding air holes of aluminum-lithium alloy T-shaped joint |
| CN113210857A (en) * | 2021-04-01 | 2021-08-06 | 西北稀有金属材料研究院宁夏有限公司 | Laser welding method for cast beryllium-aluminum alloy |
| CN113878236A (en) * | 2021-10-20 | 2022-01-04 | 浙江安防职业技术学院 | Method for synchronously welding T-shaped dissimilar metal joint by three laser beams |
| CN114453746A (en) * | 2021-12-15 | 2022-05-10 | 上海航天设备制造总厂有限公司 | Aluminum alloy skin-stringer structure double-beam swinging laser filler wire cooperative welding method |
| CN114669873A (en) * | 2022-03-04 | 2022-06-28 | 中国船舶重工集团公司第七二五研究所 | High-power optical fiber laser double-gun symmetrical welding method for medium-thickness plate titanium alloy T-shaped joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524107A (en) * | 2019-08-15 | 2019-12-03 | 上海交通大学 | A method of improving aluminum steel dissimilar metal laser welding-brazing lap joint intensity |
| CN111203639A (en) * | 2020-01-16 | 2020-05-29 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding filler wire molten drop transition monitoring system and method based on high-speed camera shooting |
| CN111203639B (en) * | 2020-01-16 | 2022-06-21 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding filler wire molten drop transition monitoring system and method based on high-speed camera shooting |
| CN111545908A (en) * | 2020-05-13 | 2020-08-18 | 南京航空航天大学 | Double-laser-beam bilateral welding device and method for T-shaped structure of additive manufacturing part |
| CN111604595B (en) * | 2020-06-09 | 2022-05-24 | 华北水利水电大学 | T-shaped joint double-beam laser wire-filling welding method capable of reducing porosity of welding seam |
| CN111604595A (en) * | 2020-06-09 | 2020-09-01 | 华北水利水电大学 | T-shaped joint double-beam laser wire-filling welding method capable of reducing porosity of welding seam |
| CN111822856A (en) * | 2020-06-10 | 2020-10-27 | 南京航空航天大学 | Ultrasonic vibration assisted double-laser-beam bilateral synchronous wire filling welding device and method for T-shaped joint |
| CN112475602A (en) * | 2020-11-13 | 2021-03-12 | 哈尔滨工业大学 | Method for eliminating laser welding air holes of aluminum-lithium alloy T-shaped joint |
| CN113210857A (en) * | 2021-04-01 | 2021-08-06 | 西北稀有金属材料研究院宁夏有限公司 | Laser welding method for cast beryllium-aluminum alloy |
| CN113878236A (en) * | 2021-10-20 | 2022-01-04 | 浙江安防职业技术学院 | Method for synchronously welding T-shaped dissimilar metal joint by three laser beams |
| CN113878236B (en) * | 2021-10-20 | 2023-12-19 | 浙江安防职业技术学院 | Method for synchronously welding T-shaped dissimilar metal joint by three laser beams |
| CN114453746A (en) * | 2021-12-15 | 2022-05-10 | 上海航天设备制造总厂有限公司 | Aluminum alloy skin-stringer structure double-beam swinging laser filler wire cooperative welding method |
| CN114669873A (en) * | 2022-03-04 | 2022-06-28 | 中国船舶重工集团公司第七二五研究所 | High-power optical fiber laser double-gun symmetrical welding method for medium-thickness plate titanium alloy T-shaped joint |
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Application publication date: 20190531 |