CN112355480A - Single-side welding and double-side welding method for corner joint of medium plate - Google Patents
Single-side welding and double-side welding method for corner joint of medium plate Download PDFInfo
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- CN112355480A CN112355480A CN202011295010.4A CN202011295010A CN112355480A CN 112355480 A CN112355480 A CN 112355480A CN 202011295010 A CN202011295010 A CN 202011295010A CN 112355480 A CN112355480 A CN 112355480A
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- welding
- laser
- joint
- welded
- medium plate
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- 238000003466 welding Methods 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 31
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 238000010891 electric arc Methods 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000002932 luster Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention discloses a single-side welding double-side method for a corner joint of a medium plate, which comprises the steps of taking two medium plates to be welded, polishing the positions to be welded and the width of the positions to be welded within 30mm, and cleaning the positions by acetone; spot welding the two medium plates by adopting a manual TIG welding method; and fixing a GMAW welding gun and a laser head at a certain angle, and welding by adopting a laser composite welding mode of laser preposition and electric arc postposition to finish the fillet joint welding part with one side welding and two sides welding. When the laser hybrid welding device is used, the laser hybrid welding mode with the preposed laser and the postpositioned electric arc is adopted for welding, the welding joint is not beveled, the welding pass is greatly reduced, the phenomenon that the welding joint is softened due to overlarge heat input is avoided, the performance of the welding joint is reduced, and the welding efficiency is improved.
Description
Technical Field
The invention mainly relates to the technical field of laser welding, in particular to a single-side and double-side welding method for a corner joint of a medium plate, and particularly relates to a method for performing single-side and double-side welding by using laser and GMAW (gas metal arc welding) of the corner joint of the medium plate.
Background
The luxury cruise ship is the only high-technology ship product which is not overcome in China at present, and a steel plate used for building a large cruise ship is thinner than a conventional steel plate, so that welding deformation control becomes an important process.
When welding fillet weld with traditional gas shielded arc welding, the slag inclusion often appears and not fuses, will guarantee the complete penetration of fillet weld, and required groove angle is big, and the welding filler metal is many, and heat input is big, adopts multilayer multichannel welding even, and this can increase welding stress and deformation undoubtedly.
The laser and GMAW welding technology has the advantages of large depth-to-width ratio of welding seams, small welding deformation, capability of meeting the requirement of a shipyard on assembly clearance and the like, and has wide application prospect in the shipping industry of China.
However, due to the limitation of the movement angle of the laser and GMAW welding gun and the laser, the coupling effect of the laser and the electric arc is poor, and the laser and GMAW single-side welding double-side forming of the angle joint is difficult to realize.
Disclosure of Invention
Aiming at the problems, the invention provides a single-side welding double-side method for the corner joint of the medium plate, the welding joint is not provided with a groove during welding, the performance of a welding seam is improved, the back sides of the corner joints of the two medium plates are fused, and a good welding seam is formed.
The purpose of the invention can be realized by the following technical scheme: a single-side welding double-side method for a corner joint of a medium plate is characterized by comprising the following steps: a. taking two medium plates to be welded, wherein the medium plates are steel plates with the thickness of 4.5-25mm, and polishing and cleaning with acetone at the position to be welded and in the width of 30mm nearby the position to be welded; b. spot welding the two medium plates by adopting a manual TIG welding method; c. and fixing a GMAW welding gun and a laser head at a certain angle, and welding by adopting a laser composite welding mode of laser preposition and electric arc postposition to finish the fillet joint welding part with one side welding and two sides welding.
Preferably, in step a, before welding, a polisher is used for polishing the position to be welded and the width near the position to be welded within 30mm, so that the metal luster is exposed at the polished position, and then acetone is used for cleaning dirt on the surface.
And further, in the step b, cleaning the surface of the workpiece before spot welding, aligning a welding wire to a welding seam, keeping the spot welding length to be 5mm, pressing the medium plate by a nozzle at the end part of a welding gun during spot welding, ensuring that the surfaces of the upper and lower medium plates are kept in a close-fitting state, and keeping the current during spot welding to be 120-150A.
Furthermore, in the step c, in the composite welding, the fixed angle is 50-55 degrees, a welding wire with the diameter of 1.2mm is adopted, and Ar +20% CO is introduced2And protecting the welding line by using the protective gas.
Compared with the prior art, the technical scheme of the invention comprises the improvement of a plurality of details besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. according to the improved scheme, the welding is carried out in a laser composite welding mode with the laser preposed and the electric arc postposition, and a welding joint is not beveled, so that the welding pass is greatly reduced, the softening of the welding joint caused by excessive heat input is avoided, the performance of a welding seam is reduced, and the welding efficiency is improved;
2. according to the invention, the back sides of two welded plates can form a fused good welding seam by adopting single-side welding, and the single-side welding of a medium plate can be realized to form an angle joint;
3. the invention uses large-scale medium-thickness steel plates for welding, has wide application range and good use effect, and is convenient for popularization and utilization.
Detailed Description
The following detailed description of specific embodiments of the present invention is provided in conjunction with examples to enable those skilled in the art to more clearly understand how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.
A single-side welding double-side method for a corner joint of a medium plate is different from the prior art in that the method comprises the following steps: a. taking two medium plates to be welded, wherein the medium plates are steel plates with the thickness of 4.5-25mm, and polishing and cleaning with acetone at the position to be welded and in the width of 30mm nearby the position to be welded; b. spot welding the two medium plates by adopting a manual TIG welding method; c. and fixing a GMAW welding gun and a laser head at a certain angle, and welding by adopting a laser composite welding mode of laser preposition and electric arc postposition to finish the fillet joint welding part with one side welding and two sides welding.
Preferably, in step a, before welding, a polisher is used for polishing the position to be welded and the width near the position to be welded within 30mm, so that the metal luster is exposed at the polished position, and then acetone is used for cleaning dirt on the surface.
And b, cleaning the surface of the workpiece before spot welding, aligning a welding wire to a welding seam, wherein the spot welding length is 5mm, pressing the medium plate by a nozzle at the end part of a welding gun during spot welding, ensuring that the surfaces of the upper and lower medium plates to be welded are kept in a close-fitting state, and controlling the current during TIG welding to be 120-150A.
In the step c, in the composite welding, the fixed angle is 50-55 degrees, a welding wire with the diameter of 1.2mm is adopted, and Ar +20% CO is introduced2And protecting the welding line by using the protective gas.
Example 1
The method of the invention comprises the following steps:
s1: taking two test plates, polishing the position to be welded and the position 30mm nearby the position to be welded and cleaning the position with acetone;
s2: spot welding the two test plates by adopting a manual TIG welding method;
s3: and (3) welding one side of the welding test plate by adopting a laser and GMAW (gas metal arc welding) method to obtain a fillet joint welding part.
Further, S1 specifically includes: AH36 steel was selected as a material to be fillet welded, and the position to be welded and the position 30mm before welding were ground by a grinder to expose the metallic luster, and then dirt was cleaned with acetone.
Further, S2 specifically includes: and a nozzle at the end part of the welding gun compresses the welding test plate, so that the upper and lower test plate surfaces are tightly adhered. S2 further includes: TIG welding (non-metal inert gas arc welding) current is. S3 specifically includes: an ABB IRB 2400 robot, a TruDisk 16002 laser and a Fronius TPS 5000 welding machine are adopted in the laser + GMAW welding test, and a GMAW welding gun and a laser head are fixed at a certain angle by a fixture device.
Further, S3 further includes: using a laser front-mounted and arc rear-mounted laser composite welding mode, selecting an ER50-6 welding wire with the diameter of 1.2mm and a protective gas Ar +20% CO2And protecting the welding seam. S3 further includes: and setting process parameters. S3 technological parameters: the laser power is 5-10kW, the wire feeding speed is 6-9m/min, the welding speed is 0.5-0.7m/min, the spacing between the optical fibers is 2-4mm, the protective gas flow is 10-20L/min, and the defocusing amount is-5- +5 mm.
In addition, the laser + GMAW welding method applied to the corner joint of the luxury cruise ship has the following advantages:
1. the welding joint is not provided with a groove (I-shaped groove), so that on one hand, the welding pass is greatly reduced, the softening of the welding joint caused by excessive heat input is avoided, and the performance of the welding joint is reduced; on the other hand, the welding efficiency is improved;
2. the back surfaces of the two test plates are prevented from being not fused, and the back surface welding line is well formed;
3. the laser and GMAW welding method is suitable for welding steel plates with larger thickness.
Example 2
The invention relates to a welding method for laser and GMAW single-side welding double-side forming of a medium plate angle joint, which is carried out according to the following steps:
step 1, polishing and cleaning surfaces of transverse plates and vertical plates of AH36 steel plates to be welded, which are 10mm in thickness, fixing a workpiece to be welded on a welding fixture, and fixing two ends of the workpiece by adopting 150A TIG welding;
step 2, fixing the GMAW welding gun with a laser head by using a clamp;
step 3, using laser front-mounted and electric arc rear-mountedThe laser hybrid welding mode adopts Ar +20% CO with the gas flow rate of 18L/min2Shielding the welding line by using shielding gas;
and 4, controlling the laser power to be 6.3kW, the wire feeding speed to be 7m/min, the welding speed to be 0.6m/min, the spacing between the smooth wires to be 4mm and the defocusing amount to be-3 mm.
By adopting the method, the front and back welding lines are well formed, and the design and use requirements are met.
If the method (only GMAW method) is not adopted, the front side welding seam is poor in forming, the back side is basically not formed, and the design and use requirements cannot be met.
The invention aims to weld the corner joint of the medium plate by laser and GMAW single-side welding double-side forming, and then single-side welding is carried out to obtain a welding line meeting the quality requirement.
The invention discloses a welding beneficial effect for laser and GMAW single-side welding and double-side forming of a medium plate corner joint, which comprises the following steps:
1. the laser composite welding has the advantages of high energy density, deep penetration, improved bridging capacity and the like, the steel plate to be welded can not be beveled, the number of welding passes is reduced, and the production time and the production cost can be reduced;
2. deformation and turning-over of each welding procedure caused by large heat influence of a welding seam always cause problems in the welding process, and the deformation problem cannot be thoroughly solved by means of mechanical leveling, water and fire shaping, back burning, structure strengthening and the like. The laser and GMAW method can effectively control welding deformation, realize single-side welding and double-side forming, and reduce turnover.
It should be noted that many variations and modifications of the embodiments of the present invention fully described are possible and are not to be considered as limited to the specific examples of the above embodiments. The above examples are given by way of illustration of the invention and are not intended to limit the invention. In conclusion, the scope of the present invention shall include those alterations or substitutions and modifications which are obvious to those of ordinary skill in the art, and shall be subject to the appended claims.
Claims (4)
1. A single-side welding double-side method for a corner joint of a medium plate is characterized by comprising the following steps: a. taking two medium plates to be welded, wherein the medium plates are steel plates with the thickness of 4.5-25mm, and polishing and cleaning with acetone at the position to be welded and in the width of 30mm nearby the position to be welded; b. spot welding the two medium plates by adopting a manual TIG welding method; c. and fixing a GMAW welding gun and a laser head at a certain angle, and welding by adopting a laser composite welding mode of laser preposition and electric arc postposition to finish the fillet joint welding part with one side welding and two sides welding.
2. A single-side welding double-side method for the fillet joint of the medium plate according to claim 1, wherein in the step a, the position to be welded and the vicinity thereof are ground within 30mm width by a grinding machine before welding, so that the metal luster is exposed at the ground part, and then the dirt on the surface is cleaned by acetone.
3. The single-side welding double-side method for the fillet joint of the medium plate according to claim 1, wherein in the step b, a nozzle at the end of a welding gun compresses the medium plate during spot welding to ensure that the upper and lower medium plate surfaces are kept in a close contact state during welding, and the current during TIG welding is 120-150A.
4. The single-sided welding double-sided method for the medium plate angle joint as claimed in claim 1, wherein in the step c, the fixed angle is 50-55 degrees in the hybrid welding, a welding wire with the diameter of 1.2mm is adopted, and Ar +20% CO is introduced2And protecting the welding line by using the protective gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295010.4A CN112355480A (en) | 2020-11-18 | 2020-11-18 | Single-side welding and double-side welding method for corner joint of medium plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295010.4A CN112355480A (en) | 2020-11-18 | 2020-11-18 | Single-side welding and double-side welding method for corner joint of medium plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112355480A true CN112355480A (en) | 2021-02-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011295010.4A Withdrawn CN112355480A (en) | 2020-11-18 | 2020-11-18 | Single-side welding and double-side welding method for corner joint of medium plate |
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| Country | Link |
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| CN (1) | CN112355480A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060074022A (en) * | 2004-12-27 | 2006-07-03 | 주식회사 포스코 | Hybrid welding method for fillet joint |
| JP2014004603A (en) * | 2012-06-22 | 2014-01-16 | Kobe Steel Ltd | Laser-arc composite welding method |
| JP2017154156A (en) * | 2016-03-02 | 2017-09-07 | 新日鐵住金株式会社 | Narrow groove weld joint using laser arc hybrid weld method and manufacturing method for the same |
| CN107971635A (en) * | 2017-11-24 | 2018-05-01 | 哈尔滨工业大学 | A kind of cut deal angle joint light beam-welding wire dislocation laser-MAG compound welding method |
| CN110142512A (en) * | 2019-07-02 | 2019-08-20 | 河海大学常州校区 | A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet |
| CN110560905A (en) * | 2019-09-18 | 2019-12-13 | 佛山科学技术学院 | Laser-arc hybrid welding process for high-strength steel plate for medium-thickness ship |
-
2020
- 2020-11-18 CN CN202011295010.4A patent/CN112355480A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060074022A (en) * | 2004-12-27 | 2006-07-03 | 주식회사 포스코 | Hybrid welding method for fillet joint |
| JP2014004603A (en) * | 2012-06-22 | 2014-01-16 | Kobe Steel Ltd | Laser-arc composite welding method |
| JP2017154156A (en) * | 2016-03-02 | 2017-09-07 | 新日鐵住金株式会社 | Narrow groove weld joint using laser arc hybrid weld method and manufacturing method for the same |
| CN107971635A (en) * | 2017-11-24 | 2018-05-01 | 哈尔滨工业大学 | A kind of cut deal angle joint light beam-welding wire dislocation laser-MAG compound welding method |
| CN110142512A (en) * | 2019-07-02 | 2019-08-20 | 河海大学常州校区 | A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet |
| CN110560905A (en) * | 2019-09-18 | 2019-12-13 | 佛山科学技术学院 | Laser-arc hybrid welding process for high-strength steel plate for medium-thickness ship |
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Application publication date: 20210212 |
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