CN103658939A - Method for welding hollow static blade body and inner cavity supporting board of turbine - Google Patents
Method for welding hollow static blade body and inner cavity supporting board of turbine Download PDFInfo
- Publication number
- CN103658939A CN103658939A CN201310679707.5A CN201310679707A CN103658939A CN 103658939 A CN103658939 A CN 103658939A CN 201310679707 A CN201310679707 A CN 201310679707A CN 103658939 A CN103658939 A CN 103658939A
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- welding
- stationary blade
- gripper shoe
- inner chamber
- hollow stationary
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/001—Turbines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Quality & Reliability (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a method for welding a hollow static blade body and an inner cavity supporting board of a turbine. The method can solve the problem that the hollow static blade body and a folded supporting board can not be reliably welded through an existing resistance spot welding method. The method for welding the hollow static blade body and the inner cavity supporting board of the turbine is characterized in that a hollow static blade and the inner cavity supporting board are assembled in the finished product positions, the hollow static blade body and the inner cavity supporting board of the turbine are welded through a plug welding connecting method, and the method comprises the following steps of (1) before-welding preparation, (2) plug welding, (3) after-welding inspection and (4) repair welding, wherein in the before-welding preparation step, plug welding grooves are formed in position where an inner arc board of the hollow static blade is welded to the inner cavity supporting board, the grooves are then cleaned, and an oxide layer or a re-melting layer, oil dirt and dirt on the surface of each groove are removed; in the plug welding step, argon tungsten-arc welding is used for backing welding, root penetration is guaranteed, the portions, above the backing welding positions, of the grooves are filled until the grooves are full.
Description
Technical field
The present invention relates to the production technology field of hollow stationary blade of steam turbine, especially relate to the production technology field that inner chamber is provided with the hollow stationary blade of steam turbine of folding shape gripper shoe, be specially the welding method of a kind of hollow stationary blade of steam turbine body and inner chamber gripper shoe.
Background technology
Inner chamber is with the hollow stationary blade (seeing Fig. 1, Fig. 2 and Fig. 3) of collapsed shape gripper shoe in running, and gripper shoe plays the effect of Reducing distortion, vibrations.In manufacturing process, generally the method by resistance spot welding is connected hollow stationary blade body with collapsed shape gripper shoe, but because hollow stationary blade inner chamber working space is narrow and small, spot-welding gun usually cannot stretch into hollow stationary blade inner chamber and carry out weld job, and hollow stationary blade body cannot be reliably connected with gripper shoe.
Summary of the invention
For the problems referred to above, the invention provides the welding method of a kind of hollow stationary blade of steam turbine body and inner chamber gripper shoe, the problem that its method that can solve current employing resistance spot welding cannot reliably be welded to connect hollow stationary blade body and collapsed shape gripper shoe.
The welding method of a kind of hollow stationary blade of steam turbine body and inner chamber gripper shoe, it is characterized in that: first hollow stationary blade and inner chamber gripper shoe are assembled to finished product position, then the method that adopts plug welding to connect is welded to connect hollow stationary blade of steam turbine body and inner chamber gripper shoe, and it comprises following processing step:
(1) before weldering, prepare: first on the inner arc plate of hollow stationary blade, with the welding position processing plug welding groove of inner chamber gripper shoe, then, to described groove cleaning, remove groove face oxide layer or remelted layer, greasy dirt and dirt;
(2) plug welding welding: adopt argon tungsten-arc welding bottoming welding, guarantee root penetration, and then fill the above groove of described bottoming welding until described groove is filled up;
(3) postwelding inspection: treat that welded seam area is cooled to room temperature, polish described groove to the transition of described hollow stationary blade outer surface smoother, and detect and to have or not weld defect;
(4) repair welding: the part that described welded seam area is existed to defect, described defect part is excavated and used argon arc welding that the region after excavating is refilled to welding fluid, until described in refill position and again adopt the method for described step (3) to check after cooling, until weld is accepted.
It is further characterized in that:
Described plug welding groove is conical plug welding hole, and the bottom diameter D of described conical plug welding hole is Φ 4 ± 0.5mm, and apical pore diameter d is Φ 8 ± 0.5mm;
The inner arc plate of described conical plug welding hole position and the clearance control between described inner chamber gripper shoe are at 0～1.5mm;
Bottoming welding in described step (2), adopt argon arc welding machine to carry out bottoming welding to described conical plug welding hole, the pure argon that employing purity is >=99.99% is as protection gas, pure argon flow is 12L/min, welding current 90 A～100A, weldingvoltage 12 V～14V, wire feed rate 5 mm/min～20mm/min, the 308LSi(ISO 14343-B of employing diameter of phi 1.0 or Φ 1.2) welding wire carries out bottoming filling, send less welding wire, root through welding during bottoming;
In described step (2), fill being operating as of the above groove diameter of described bottoming welding, adopting diameter is the 308LSi(ISO 14343-B of Φ 2.0) welding wire carries out plug welding, welding current 100 A～120A, weldingvoltage 12 V～14V, the pure argon that employing purity is >=99.99% is as protection gas, and argon flow amount is 12L/min;
The postwelding inspection of described step (3), carries out visual detection (VT) and dye penetrating to described welded seam area and detects (PT), guarantees weld seam pore-free, crackle, is mingled with, the defect such as slag inclusion;
The defect part in the repair welding of described step (4), described welded seam area being existed; adopt carbide rotary tool cutter that described defect part is excavated totally; after removing surface, adopt argon-arc welding gun in described defect part repair welding; repair welding electric current: 130 A～140A; repair welding voltage: 12 V～14V; it is the 308LSi(ISO 14343-B of Φ 2.0 that welding wire adopts diameter), protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
It is further characterised in that:
Described plug welding position is provided with when a plurality of, and plug welding welding is carried out in the plug welding position being started successively to the inside by the plug welding position of described hollow stationary blade blade root end, integral shroud end successively when carrying out described step (2).
The beneficial effect of the inventive method is:
(1) it adopts that flexibility is high, the mode of adaptable plug welding is welded to connect hollow stationary blade body and inner chamber gripper shoe, thereby can effectively solve tradition and adopt resistance spot welding time because the narrow and small spot-welding gun of hollow stationary blade intracavity space cannot enter the problem that inner chamber carries out spot welding operation, guarantee being reliably welded to connect of hollow stationary blade body and inner chamber gripper shoe;
(2) its plug welding groove is conical plug welding hole, it controls the tapering of conical plug welding hole by controlling the apical pore of conical plug welding hole and the diameter of bottom outlet, to guarantee that thereby welding gun can stretch into the comfortableness that improves weld job in plug welding hole, the weld defect causing not because of angle of welding gun while also effectively avoiding welding reliably;
(3) it also avoids weld defect by controlling the inner arc plate of conical plug welding hole position and the gap between inner chamber gripper shoe.
Accompanying drawing explanation
Fig. 1 is the structural representation of hollow stationary blade of steam turbine body;
Fig. 2 is the structural representation of hollow stationary blade of steam turbine inner chamber gripper shoe;
Fig. 3 is the assembly structure schematic diagram of hollow stationary blade of steam turbine body and inner chamber gripper shoe;
Fig. 4 is the position view of plug welding bellmouth in the inventive method;
Fig. 5 is that the A-A of Fig. 4 is to sectional structure schematic diagram;
Fig. 6 is the local structure for amplifying schematic diagram at B place in Fig. 5.
The specific embodiment
See Fig. 4, Fig. 5 and Fig. 6, the welding method of a kind of hollow stationary blade of steam turbine body and inner chamber gripper shoe, first hollow stationary blade 1 and inner chamber gripper shoe 2 are assembled to finished product position, then the method that adopts plug welding to connect is welded to connect hollow stationary blade of steam turbine body and inner chamber gripper shoe, and the processing step that its concrete plug welding connects is as follows:
(1) before weldering, prepare: first according to designing requirement, adopt the mode of mechanical milling processing on the inner arc plate 3 of hollow stationary blade, welding position processing conical plug welding hole with inner chamber gripper shoe, the bottom diameter D1 of conical plug welding hole is Φ 4 ± 0.5mm, apical pore diameter D2 is Φ 8 ± 0.5mm, in the present embodiment, process a, b, c, d, e, f, g, h is totally 8 conical plug welding holes, and guarantee that the hollow stationary blade inner arc plate of 8 conical plug welding hole positions and the gap between inner chamber gripper shoe are at 0～1.5mm, then these 8 conical plug welding holes are cleared up, remove surface oxide layer or remelted layer, greasy dirt and dirt,
(2) plug welding welding: first adopt argon tungsten-arc welding, by the order of h → a → g → b → f → c → e → d, 8 conical plug welding holes are carried out to bottoming welding successively, guarantee root penetration, and then successively 8 conical plug welding holes after bottoming welding are carried out to weld seam filling until each conical plug welding hole is filled up by said sequence;
(3) postwelding inspection: until 8 weld zone cools to room temperature, by the polishing of each welded seam area to the transition of hollow stationary blade outer surface smoother, and each welding region is carried out to visual detection (VT) and dye penetrating and detect (PT), guarantee weld seam pore-free, crackle, be mingled with, the defect such as slag inclusion;
(4) repair welding: butt welded seam region exists the part of defect, adopt carbide rotary tool cutter that defect part is excavated, after removing surface and use argon-arc welding gun to carry out repair welding to the region after excavating, after repair welding position is cooling, polished and defects detection in repair welding region again, if still defectiveness, continues this defect area to excavate rear repair welding, until weld is accepted.
In Fig. 4,4 back of the body arc plates that are hollow stationary blade.
Take conical plug welding hole d place in embodiment is below example, specifically describes the operation process of plug welding welding and repair welding in the inventive method:
Embodiment mono-:
First conical plug welding hole d is carried out to bottoming welding, the pure argon that employing purity is >=99.99% is as protection gas, argon flow amount is 12L/min, welding current 90 A, weldingvoltage 13V, wire feed rate 13mm/min, adopts the 308LSi(ISO 14343-B of diameter of phi 1.0) welding wire carry out bottoming filling, during bottoming, send less welding wire, root through welding;
And then the conical plug welding hole after backing welding is connect carries out plug welding welding until conical plug welding hole is filled up, it is the 308LSi(ISO 14343-B of Φ 2.0 that plug welding when welding adopts diameter) welding wire carries out plug welding, welding current 110A, weldingvoltage 12 V, the pure argon that employing purity is >=99.99% is as protection gas, and argon flow amount is 12L/min;
When defect part is carried out to repair welding, adopt argon-arc welding gun at described defect part repair welding, repair welding electric current: 140A; repair welding voltage: 12 V; it is the 308LSi(ISO 14343-B of Φ 2.0 that welding wire adopts diameter), protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
Embodiment bis-:
First conical plug welding hole d is carried out to bottoming welding, the pure argon that employing purity is >=99.99% is as protection gas, argon flow amount is 12L/min, welding current 100A, weldingvoltage 12 V, wire feed rate 20mm/min, adopting diameter is the 308LSi(ISO 14343-B of Φ 1.2) welding wire carry out bottoming filling, during bottoming, send less welding wire, root through welding;
And then the conical plug welding hole after backing welding is connect carries out plug welding welding until conical plug welding hole is filled up, it is the 308LSi(ISO 14343-B of Φ 2.0 that plug welding when welding adopts diameter) welding wire carries out plug welding, welding current 120A, weldingvoltage 13V, the pure argon that employing purity is >=99.99% is as protection gas, and argon flow amount is 12L/min;
When defect part is carried out to repair welding, adopt argon-arc welding gun in described defect part repair welding, repair welding electric current: 130 A; repair welding voltage: 13V; it is the 308LSi(ISO 14343-B of Φ 2.0 that welding wire adopts diameter), protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
Embodiment tri-:
First conical plug welding hole d is carried out to bottoming welding, the pure argon that employing purity is >=99.99% is as protection gas, argon flow amount is 12L/min, welding current 95A, weldingvoltage 14V, wire feed rate 5 mm/min, adopt the 308LSi(ISO 14343-B of diameter of phi 1.0) welding wire carry out bottoming filling, during bottoming, send less welding wire, root through welding;
And then the conical plug welding hole after backing welding is connect carries out plug welding welding until conical plug welding hole is filled up, it is the 308LSi(ISO 14343-B of Φ 2.0 that plug welding when welding adopts diameter) welding wire carries out plug welding, welding current 100 A～120A, weldingvoltage 12 V～14V, the pure argon that employing purity is >=99.99% is as protection gas, and argon flow amount is 12L/min;
When defect part is carried out to repair welding; adopt argon-arc welding gun in described defect part repair welding; repair welding electric current: 130 A～140A; repair welding voltage: 12 V～14V; it is the 308LSi(ISO 14343-B of Φ 2.0 that welding wire adopts diameter); protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
Claims (8)
1. the welding method of a hollow stationary blade of steam turbine body and inner chamber gripper shoe, it is characterized in that: first hollow stationary blade and inner chamber gripper shoe are assembled to finished product position, then the method that adopts plug welding to connect is welded to connect hollow stationary blade of steam turbine body and inner chamber gripper shoe, and it comprises following processing step:
(1) before weldering, prepare: first on the inner arc plate of hollow stationary blade, with the welding position processing plug welding groove of inner chamber gripper shoe, then, to described groove cleaning, remove groove face oxide layer or remelted layer, greasy dirt and dirt;
(2) plug welding welding: adopt argon tungsten-arc welding bottoming welding, guarantee root penetration, and then fill the above groove of described bottoming welding until described groove is filled up;
(3) postwelding inspection: treat that welded seam area is cooled to room temperature, polish described groove to the transition of described hollow stationary blade outer surface smoother, and detect and to have or not weld defect;
(4) repair welding: the part that described welded seam area is existed to defect, described defect part is excavated and used argon arc welding that the region after excavating is refilled to welding fluid, until described in refill position and again adopt the method for described step (3) to check after cooling, until weld is accepted.
2. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 1 and inner chamber gripper shoe, it is characterized in that: described plug welding groove is conical plug welding hole, the bottom diameter D of described conical plug welding hole is Φ 4 ± 0.5mm, and apical pore diameter d is Φ 8 ± 0.5mm.
3. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 2 and inner chamber gripper shoe, is characterized in that: the inner arc plate of described conical plug welding hole position and the clearance control between described inner chamber gripper shoe are at 0～1.5mm.
4. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 1 and inner chamber gripper shoe; it is characterized in that: the bottoming welding in described step (2); adopt argon arc welding machine to carry out bottoming welding to described conical plug welding hole; the pure argon that employing purity is >=99.99% is as protection gas; pure argon flow is 12L/min; welding current 90 A～100A; weldingvoltage 12 V～14V; wire feed rate 5 mm/min～20mm/min; adopt the 308LSi type welding wire of diameter of phi 1.0 or Φ 1.2 to carry out bottoming filling; during bottoming, send less welding wire, root through welding.
5. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 4 and inner chamber gripper shoe; it is characterized in that: in described step (2), fill being operating as of the above groove diameter of described bottoming welding; employing diameter is that the 308LSi type welding wire of Φ 2.0 carries out plug welding; welding current 100 A～120A; weldingvoltage 12 V～14V; the pure argon that employing purity is >=99.99% is as protection gas, and argon flow amount is 12L/min.
6. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 1 and inner chamber gripper shoe, it is characterized in that: the postwelding inspection of described step (3), described welded seam area is carried out to visual detection and dye penetrating and detect, guarantee weld seam pore-free, crackle, be mingled with, the defect such as slag inclusion.
7. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 1 and inner chamber gripper shoe; it is characterized in that: the defect part in the repair welding of described step (4), described welded seam area being existed; adopt carbide rotary tool cutter that described defect part is excavated totally; after removing surface, adopt argon-arc welding gun in described defect part repair welding; repair welding electric current: 130 A～140A; repair welding voltage: 12 V～14V; it is the 308LSi type welding wire of Φ 2.0 that welding wire adopts diameter; protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
8. the welding method of a kind of hollow stationary blade of steam turbine body according to claim 1 and inner chamber gripper shoe, it is characterized in that: described plug welding position is provided with when a plurality of, plug welding welding is carried out in the plug welding position being started successively to the inside by the plug welding position of described hollow stationary blade blade root end, integral shroud end successively when carrying out described step (2).
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| CN201310679707.5A CN103658939B (en) | 2013-12-15 | 2013-12-15 | A kind of welding method of hollow stationary blade of steam turbine body and inner chamber gripper shoe |
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| CN201310679707.5A CN103658939B (en) | 2013-12-15 | 2013-12-15 | A kind of welding method of hollow stationary blade of steam turbine body and inner chamber gripper shoe |
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| CN103658939B CN103658939B (en) | 2016-06-15 |
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| CN104476076A (en) * | 2014-11-29 | 2015-04-01 | 无锡透平叶片有限公司 | Spot-welding positioning fixture device for hollow blade |
| CN110153807A (en) * | 2019-03-29 | 2019-08-23 | 武汉船用机械有限责任公司 | Welding Repair method and reparation tooling for taper hole |
| CN110788453A (en) * | 2019-11-28 | 2020-02-14 | 南通科硕海洋装备科技有限公司 | Plug welding method for sheet metal parts |
| CN114273807A (en) * | 2021-11-12 | 2022-04-05 | 武汉船用机械有限责任公司 | Method for assembling and welding upper bearing plate of suspension bridge |
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| CN110788453A (en) * | 2019-11-28 | 2020-02-14 | 南通科硕海洋装备科技有限公司 | Plug welding method for sheet metal parts |
| CN110788453B (en) * | 2019-11-28 | 2022-02-08 | 南通科硕海洋装备科技有限公司 | Plug welding method for sheet metal parts |
| CN114273807A (en) * | 2021-11-12 | 2022-04-05 | 武汉船用机械有限责任公司 | Method for assembling and welding upper bearing plate of suspension bridge |
| CN114273807B (en) * | 2021-11-12 | 2023-04-07 | 武汉船用机械有限责任公司 | Method for assembling and welding upper bearing plate of suspension bridge |
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| CN103658939B (en) | 2016-06-15 |
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