CN113857676A - A composite welding joint for wide-gap welding of gas turbine turbine blades - Google Patents
A composite welding joint for wide-gap welding of gas turbine turbine blades Download PDFInfo
- Publication number
- CN113857676A CN113857676A CN202111402100.3A CN202111402100A CN113857676A CN 113857676 A CN113857676 A CN 113857676A CN 202111402100 A CN202111402100 A CN 202111402100A CN 113857676 A CN113857676 A CN 113857676A
- Authority
- CN
- China
- Prior art keywords
- welding
- wide
- laser
- lens
- gas turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 157
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 14
- 238000010891 electric arc Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 238000003756 stirring Methods 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- 230000008439 repair process Effects 0.000 description 14
- 239000000306 component Substances 0.000 description 8
- 230000004927 fusion Effects 0.000 description 7
- 239000000956 alloy Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000010754 BS 2869 Class F Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
本发明公开的一种用于燃气轮机透平静叶片宽隙焊接的复合焊接头，包括摆动激光焊接头和电弧焊枪，弧焊枪通过焊枪夹持环与摆动激光焊接头连接。摆动激光焊接头输出光斑路径可呈螺旋型，激光光束对熔池有搅拌作用，达到排除焊缝中气孔的目的，同时，激光‑电弧光斑直径远远大于传统单激光焊接头的输出光斑直径，达到放大激光光斑的目的，克服传统单激光束焊接头对裂纹间隙的适应性差的不足。该装置结构简单、使用方便、实用性强的特点，有效解决传统单一激光焊方法适应间隙窄、焊缝气孔多的难题。
The invention discloses a composite welding head for wide-gap welding of gas turbine turbine stationary blades, which comprises an oscillating laser welding head and an electric arc welding head. The arc welding head is connected to the oscillating laser welding head through a welding gun clamping ring. The path of the output spot of the oscillating laser welding head can be spiral, and the laser beam has a stirring effect on the molten pool to achieve the purpose of eliminating pores in the weld. At the same time, the diameter of the laser-arc spot is much larger than that of the traditional single laser welding head. The purpose of enlarging the laser spot is achieved, and the deficiency of the traditional single laser beam welding joint's poor adaptability to the crack gap is overcome. The device has the characteristics of simple structure, convenient use and strong practicability, and effectively solves the problems that the traditional single laser welding method can adapt to narrow gaps and many pores in the welding seam.
Description
Technical Field
The invention belongs to the technical field of automatic welding, and particularly relates to a composite welding joint for wide-gap welding of turbine stationary blades of a gas turbine.
Background
The turbine stator blade is one of core components of the gas turbine, and under the action of cycle temperature and thermal stress load caused by frequent start and stop of a unit, thermal fatigue crack damage (crack gaps are generally in the range of 0.3-3 mm) is inevitably generated, so that the high-temperature performance and the service life of the turbine stator blade are seriously influenced. In order to prolong the service life of components and ensure the safe, economic and continuous operation of the power generation equipment of the gas turbine, the development of the welding repair method of the turbine stationary blade of the gas turbine has extremely important significance.
Argon arc welding and other traditional fusion welding processes are listed as standard welding repair methods of gas turbine heat channel components below class E by the American Electric Power Research Institute (EPRI). However, the traditional fusion welding process has large heat input, particularly for high-temperature alloy plates of turbine stationary blades with large thickness, the welding permeability is poor, the back of welding seams is easy to generate the defect of depression, the generated residual stress is easy to cause deformation of the turbine stationary blades and hot cracking of the welding seams, and the repair precision and performance are difficult to ensure. In addition, the alloy material used by the F-grade and above machine-type high-temperature components has higher Al + Ti content and poorer weldability, and the traditional fusion welding process has increasingly greater limitation in the field of repairing the F-grade and above machine-type high-temperature components. Laser welding has become the primary fusion weld repair method for class F gas turbine hot path components. However, the laser welding has more strict requirements on assembly gaps than the traditional fusion welding process, the gaps are generally required to be controlled within 10-15% of the plate thickness, the maximum gap cannot exceed 0.3mm, and a single laser beam is easy to cause the generation of pore defects of welding seams, so that the rejection rate of workpieces is provided, and the application of the laser welding in the field of turbine stator blade large-gap crack welding repair is limited. According to the characteristics of large thickness, large crack gap and the like of the turbine stator blade matrix, a composite welding method with better adaptability is explored, the complementary advantages of different welding methods are realized, the welding efficiency is improved, the repair cost is reduced, and the method is a development trend of the future hot channel component welding repair technology.
Aiming at the limitation of the traditional fusion welding and laser welding in the field of crack damage repair of high-temperature alloy thin-wall components, the laser-electric arc composite welding joint for the wide-gap cracks of the turbine stator blade, which has better crack gap adaptability and can effectively solve the problem of weld pores, is developed, and has important practical significance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the composite welding joint for the wide-gap welding of the turbine stator blade of the gas turbine, which can effectively solve the problem of air holes of the welding seam, greatly improve the adaptability of the welding seam gap, the welding qualification rate and the production efficiency and meet the laser welding repair requirement of the crack damage of the turbine stator blade of the gas turbine.
The invention is realized by the following technical scheme:
a composite welding joint for wide-gap welding of a turbine stator blade of a gas turbine comprises a swinging laser welding joint and an electric arc welding gun, wherein the electric arc welding gun is connected with the swinging laser welding joint through a welding gun clamping ring, a control end of the electric arc welding gun is connected with an electric arc welding power supply, and a welding wire device of the electric arc welding gun is connected with a wire feeding mechanism;
the swing laser welding head comprises a collimation lens, a swing lens and a focusing lens, the collimation lens is arranged on an output light path of laser, the swing lens is arranged on the output light path of the collimation lens and used for adjusting a light path, the focusing lens is arranged on a reflection light path of the swing lens, light spots output by the focusing lens are coupled with welding wires output by a welding wire device, and an electric arc welding gun is overlapped with a molten pool formed by the light spots.
Preferably, the swing mirror comprises an X-axis mirror and a Y-axis mirror, the axis of the X-axis mirror is perpendicular to the axis of the Y-axis mirror, and the X-axis mirror is located below the Y-axis mirror.
Preferably, the X-axis mirror and the Y-axis mirror are connected to output shafts of two driving motors, respectively.
Preferably, the X-axis mirror and the Y-axis mirror are both mirrors.
Preferably, the oscillation frequency of the light spot output by the oscillating laser welding head is 10HZ to 300 HZ.
Preferably, the swing diameter of the swing laser welding head when the defocusing amount is 0.3-3 mm.
Preferably, the collimating mirror is a reflective collimating mirror.
Preferably, the collimating lens is disposed on an output light path of the laser generator.
Preferably, the welding wire output by the welding wire device is positioned in a molten pool area.
Preferably, the path of the light spot output by the swinging laser welding head is spiral.
Compared with the prior art, the invention has the following beneficial technical effects:
the composite welding joint for wide-gap welding of the turbine stator blade of the gas turbine has the characteristics of simple structure, convenience in use and high practicability, under the action of the driving motor, the laser beam swings at high frequency in the X-axis direction and the Y-axis direction to form a spiral welding path, a laser spot is amplified, the laser beam has an obvious stirring effect on a molten pool, the porosity in a welding seam is reduced, the problems of narrow adaptive gap and more welding seam air holes in the traditional single laser welding method are effectively solved, the repair rate of wide-gap cracks of a thick high-temperature alloy plate in the turbine stator blade can be reduced, the welding qualification rate and the production efficiency can be improved, and the argon arc welding repair requirement of crack damage of the turbine stator blade of the gas turbine can be met.
Drawings
FIG. 1 is a schematic structural diagram of a swinging laser-arc hybrid welding head according to the present invention;
FIG. 2 is a schematic view of a weld pool resulting from using the oscillating laser-arc hybrid welding head of the present invention;
FIG. 2a is a molten pool obtained using a swinging laser welding head; FIG. 2b shows the resulting weld pool of a conventional single laser welded joint.
In the figure: 1-swinging the laser welding head; 101-collimating lens; 102-Y axis oscillating lens; 103-X axis oscillating mirror; 104-Y axis drive motor; 105-X axis drive motor; 106-focusing lens; 2-arc welding gun; 3-welding gun clamping ring; 4-wire feeding mechanism; 5-arc welding power supply; 6-spot and puddle area.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1, a composite welding head for wide gap welding of turbine stator blades of a gas turbine comprises a swinging laser welding head 1 and an arc welding gun 2, wherein the arc welding gun 2 is connected with the swinging laser welding head 1 through a welding gun clamping ring 3.
The swing laser welding head 1 comprises a collimating lens 101, a swing lens and a focusing lens 106, wherein the collimating lens 101 is arranged on an output light path of laser, the swing lens is arranged on the output light path of the collimating lens 101, the swing lens is used for adjusting a light path, the focusing lens 106 is arranged on a reflection light path of the swing lens, and the focusing lens 106 outputs a spiral light spot path.
The control end of the arc welding gun 2 is connected with an arc welding power supply 5, a welding wire device of the arc welding gun 2 is connected with a wire feeding mechanism, a welding wire output by the welding wire device is always positioned in a molten pool area 6, and the arc welding gun 2 is superposed with a molten pool formed by light spots.
The swing mirror comprises an X-axis mirror 103 and a Y-axis mirror 102, the X-axis mirror 103 and the Y-axis mirror 102 are respectively connected with output shafts of an X-axis driving motor 105 and a Y-axis driving motor 104, the swing angles of the X-axis mirror 103 and the Y-axis mirror 102 are controlled through the two driving motors, the path of laser is controlled, and the effects of amplifying laser spots and stirring a molten pool are achieved;
the collimating mirror is a reflective collimating mirror.
The swing frequency of the light spot output by the swing laser welding head 1 is 10 HZ-300 HZ, and the swing diameter when the defocusing amount is 0 is in the range of 0.3-3 mm.
The output laser path of the swinging laser welding head is spiral, the swinging laser welding head is suitable for welding a gap with a crack of 0.1-3 mm, and is suitable for welding high-temperature component base materials, such as turbine stator blades of a gas turbine, and turbine stator blades of the 1 st, 2 nd, 3 th and 4 th stages of turbines and the like.
Referring to fig. 2, the composite welding head for wide gap welding of the turbine stator blade of the gas turbine welds and repairs the output light spot moving path when the crack damage of the service transition section occurs. It can be seen that under the movement of the swinging laser welding head, the path of the light spot output by the swinging laser welding head is in a spiral shape, the input of the electric arc has obvious broadening effect on the molten pool, and the maximum crack clearance can be adapted to reach 3.0mm, which is far larger than the fusion width (about 2.0mm) obtained by stirring a single laser welding head.
The swing laser welding head is connected with an arc welding power supply and a wire feeding mechanism, the welding head is connected with an arc welding gun through a welding gun clamping ring, single laser passing through a collimating lens swings an X-axis lens and a Y-axis lens through an X-axis driving motor and a Y-axis driving motor respectively in the reflection process of the swing lens, the path of a light path is controlled, the light path is formed in a spiral mode, and the effects of amplifying laser spots and stirring a molten pool are achieved. Meanwhile, the swinging laser beam output by the swinging laser welding head is coupled with the electric arc filler wire, so that a molten pool is wider and filled fully, and the adaptability of a gap is further improved. Under the condition that the welding head moves, the path of an output light spot of the swinging laser welding head can be in a spiral shape, a laser beam has a stirring effect on a molten pool, the purpose of removing air holes in a welding seam is achieved, meanwhile, the diameter of a laser-electric arc light spot is far larger than that of the output light spot of the traditional single laser welding head, the purpose of amplifying the laser light spot is achieved, and the defect that the adaptability of the traditional single laser beam welding head to crack gaps is poor is overcome. The device has the characteristics of simple structure, convenient use and strong practicability, effectively solves the difficult problems of narrow adaptive clearance and many welding seam air holes of the traditional single laser welding method, simultaneously reduces the repair rate of wide-gap cracks of thick high-temperature alloy plates in the turbine stator blade, is favorable for improving the welding qualification rate and the production efficiency, and can meet the laser welding repair requirement of the crack damage of the turbine stator blade of the gas turbine.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111402100.3A CN113857676A (en) | 2021-11-19 | 2021-11-19 | A composite welding joint for wide-gap welding of gas turbine turbine blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111402100.3A CN113857676A (en) | 2021-11-19 | 2021-11-19 | A composite welding joint for wide-gap welding of gas turbine turbine blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113857676A true CN113857676A (en) | 2021-12-31 |
Family
ID=78985207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111402100.3A Pending CN113857676A (en) | 2021-11-19 | 2021-11-19 | A composite welding joint for wide-gap welding of gas turbine turbine blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113857676A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115533321A (en) * | 2022-10-08 | 2022-12-30 | 唐山开元焊接自动化技术研究所有限公司 | Full penetration welding method for circumferential weld of aluminum alloy tank car tank body |
| CN116618774A (en) * | 2023-05-05 | 2023-08-22 | 西安热工研究院有限公司 | Device and method for induction brazing repair of micro-cracks on blade surface |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056533A (en) * | 2012-12-20 | 2013-04-24 | 华中科技大学 | Oscillatory scanning laser beam-electric arc hybrid welding method and system |
| US20160368089A1 (en) * | 2015-06-19 | 2016-12-22 | Ipg Photonics Corporation | Laser welding head with dual movable mirrors providing beam movement and laser welding systems and methods using same |
| CN210817947U (en) * | 2019-11-06 | 2020-06-23 | 北京世纪拓天科技有限公司 | High-efficient high-power welding vibration lens |
| CN112453709A (en) * | 2020-11-20 | 2021-03-09 | 西安热工研究院有限公司 | Welding method for crack damage of deformed high-temperature alloy thin-wall part |
| CN112453703A (en) * | 2020-11-25 | 2021-03-09 | 南京航空航天大学 | Complex special-shaped structure remote laser welding method based on visual sensing |
| CN216802104U (en) * | 2021-11-19 | 2022-06-24 | 华能国际电力股份有限公司 | Composite welding joint for wide-gap welding of turbine stator blade of gas turbine |
-
2021
- 2021-11-19 CN CN202111402100.3A patent/CN113857676A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056533A (en) * | 2012-12-20 | 2013-04-24 | 华中科技大学 | Oscillatory scanning laser beam-electric arc hybrid welding method and system |
| US20160368089A1 (en) * | 2015-06-19 | 2016-12-22 | Ipg Photonics Corporation | Laser welding head with dual movable mirrors providing beam movement and laser welding systems and methods using same |
| CN210817947U (en) * | 2019-11-06 | 2020-06-23 | 北京世纪拓天科技有限公司 | High-efficient high-power welding vibration lens |
| CN112453709A (en) * | 2020-11-20 | 2021-03-09 | 西安热工研究院有限公司 | Welding method for crack damage of deformed high-temperature alloy thin-wall part |
| CN112453703A (en) * | 2020-11-25 | 2021-03-09 | 南京航空航天大学 | Complex special-shaped structure remote laser welding method based on visual sensing |
| CN216802104U (en) * | 2021-11-19 | 2022-06-24 | 华能国际电力股份有限公司 | Composite welding joint for wide-gap welding of turbine stator blade of gas turbine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115533321A (en) * | 2022-10-08 | 2022-12-30 | 唐山开元焊接自动化技术研究所有限公司 | Full penetration welding method for circumferential weld of aluminum alloy tank car tank body |
| CN116618774A (en) * | 2023-05-05 | 2023-08-22 | 西安热工研究院有限公司 | Device and method for induction brazing repair of micro-cracks on blade surface |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113385822B (en) | Narrow gap laser-TIG arc hybrid welding device and welding method | |
| CN104801852B (en) | A beam-splitting double-focus point laser processing head | |
| CN110170742B (en) | Laser welding device and method for aluminum alloy medium plate | |
| CN113857676A (en) | A composite welding joint for wide-gap welding of gas turbine turbine blades | |
| CN103737176A (en) | Hybrid welding method and hybrid welding equipment for laser electromagnetic pulse | |
| CN102189337B (en) | Repair method of Ni3Al-based alloy castings by laser welding without cracks | |
| CN102308062A (en) | Turbine wheel and shaft joining processes | |
| CN114367741B (en) | Welding-following ultrasonic-galvanometer scanning composite laser welding system and method | |
| CN103769746A (en) | Pulsed high magnetic field auxiliary laser welding method and device | |
| CN111940901A (en) | A kind of aluminum alloy medium and thick plate laser welding device and method | |
| CN107584211A (en) | A kind of high power laser welding system and its welding method based on high-velocity scanning galvanometer | |
| CN111604593A (en) | A laser mirror welding method | |
| CN117444437A (en) | Method and device for special laser welding of thick plate narrow gap structure based on coaxial mixing of silk powder | |
| CN112975132A (en) | Laser welding ware with adjustable solder joint | |
| CN103831533A (en) | Titanium alloy laser-MIG composite welding method | |
| CN114833453A (en) | Welding method and welding device based on light beam and electromagnetic composite stirring | |
| CN111618438A (en) | Magnetic field assisted double-laser-TIG coupling bilateral synchronous welding device and method | |
| CN112453709A (en) | Welding method for crack damage of deformed high-temperature alloy thin-wall part | |
| CN216802104U (en) | Composite welding joint for wide-gap welding of turbine stator blade of gas turbine | |
| CN114012260A (en) | A laser welding repair method for crack damage of high temperature components of gas turbine | |
| CN203649660U (en) | Laser electromagnetic pulse composite welding equipment | |
| CN101073858A (en) | Method for laser in-situ repairing cavitation-vane gas turbine | |
| CN216325796U (en) | A single laser stir welding head for wide gap welding of gas turbine combustor components | |
| CN103480973A (en) | Three-stage cold metal transfer welding method for steam turbine hollow static blades | |
| CN111375896A (en) | Welding torch for laser and photoelectric arc composite welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |