CN103658939B - A kind of welding method of hollow stationary blade of steam turbine body and inner chamber gripper shoe - Google Patents
A kind of welding method of hollow stationary blade of steam turbine body and inner chamber gripper shoe Download PDFInfo
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- CN103658939B CN103658939B CN201310679707.5A CN201310679707A CN103658939B CN 103658939 B CN103658939 B CN 103658939B CN 201310679707 A CN201310679707 A CN 201310679707A CN 103658939 B CN103658939 B CN 103658939B
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- stationary blade
- gripper shoe
- inner chamber
- hollow stationary
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Classifications
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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 the welding method of a kind of hollow stationary blade of steam turbine body and inner chamber gripper shoe, its problem that can solve to adopt the method for resistance spot welding hollow stationary blade body and collapsed shape gripper shoe to be reliably welded to connect at present. It is characterized in that: first hollow stationary blade and inner chamber gripper shoe are assembled to finished product position, then the method that plug welding connects is adopted hollow stationary blade of steam turbine body and inner chamber gripper shoe to be welded to connect, it comprises the following steps that: (1) weldering before prepare: first on the inner arc plate of hollow stationary blade and inner chamber gripper shoe welding position processing plug welding groove, then described groove is cleared up, remove groove face oxide layer or remelted layer, greasy dirt and dirt; (2) plug welding welding: adopt argon tungsten-arc welding bottoming welding, it is ensured that root penetration, then refills the above groove of bottoming welding until being filled up by described groove; (3) postwelding inspection; (4) repair welding.
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 (see 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, hollow stationary blade body is connected by the method typically via resistance spot welding with collapsed shape gripper shoe, but owing to 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 so that hollow stationary blade body and gripper shoe cannot be reliably connected.
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, its problem that can solve to adopt the method for resistance spot welding hollow stationary blade body and collapsed shape gripper shoe to be reliably welded to connect at present.
A kind of welding method 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 adopting the method that plug welding connects hollow stationary blade of steam turbine body and inner chamber gripper shoe to be welded to connect, it comprises the following steps that:
(1) prepare before weldering: first on the inner arc plate of hollow stationary blade and the welding position processing plug welding groove of inner chamber gripper shoe, then described groove is cleared up, remove groove face oxide layer or remelted layer, greasy dirt and dirt;
(2) plug welding welding: adopt argon tungsten-arc welding bottoming welding, it is ensured that root penetration, then refills the above groove of described bottoming welding until being filled up by described groove;
(3) postwelding inspection: treat that welded seam area is cooled to room temperature, polish described groove to described hollow stationary blade outer surface smoother transition, and detect the presence of weld defect;
(4) repair welding: the part to described welded seam area existing defects, described defect part is excavated and uses argon arc welding that the region after excavating is refilled welding fluid, until described in refill position cooling after be again with the method for described step (3) and check, till weld is accepted.
It is further characterized by
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;
Clearance control between inner arc plate and the described inner chamber gripper shoe of described conical plug welding hole position is at 0～1.5mm;
Bottoming welding in described step (2), adopt argon arc welding machine that described conical plug welding hole is carried out bottoming welding, the pure argon adopting purity to be >=99.99% is as protection gas, pure argon flow is 12L/min, welding current 90A～100A, weldingvoltage 12V～14V, wire feed rate 5mm/min～20mm/min, adopt the 308LSi(ISO14343-B of diameter of phi 1.0 or Φ 1.2) welding wire carry out bottoming filling, send welding wire, root through welding during bottoming less;
The operation filling the above groove diameter of described bottoming welding in described step (2) is, adopting diameter is the 308LSi(ISO14343-B of Φ 2.0) welding wire carries out plug welding, welding current 100A～120A, weldingvoltage 12V～14V, the pure argon adopting purity to be >=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 pigmentation and innltration test (PT) to described welded seam area, it is ensured that weld seam pore-free, crackle, be mingled with, the defect such as slag inclusion;
The defect part in the repair welding of described step (4), described welded seam area existed; carbide rotary tool cutter is adopted to excavate totally by described defect part; adopt argon-arc welding gun in described defect part repair welding after removing surface; repair welding electric current: 130A～140A; repair welding voltage: 12V～14V; the 308LSi(ISO14343-B that welding wire adopts diameter to be Φ 2.0), protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
It is further characterised by:
When described plug welding position is provided with multiple, when carrying out described step (2) successively by described hollow stationary blade blade root end, integral shroud end plug welding position successively plug welding position to the inside carry out plug welding welding.
The inventive method provides the benefit that:
(1) it adopts motility mode high, adaptable plug welding hollow stationary blade body and inner chamber gripper shoe to be welded to connect, owing to the narrow and small spot-welding gun of hollow stationary blade intracavity space cannot be introduced into the problem that inner chamber carries out spot welding operation when being thus able to effectively solve conventionally employed resistance spot welding, it is ensured that hollow stationary blade body is reliably welded to connect with inner chamber gripper shoe;
(2) its plug welding groove is conical plug welding hole, the diameter of its apical pore and bottom outlet by controlling conical plug welding hole controls the tapering of conical plug welding hole, to ensure that welding gun can reliably stretch in plug welding hole thus improving the comfortableness of weld job, the weld defect caused because angle of welding gun is inadequate when being also prevented effectively from welding;
(3) it avoids weld defect also by the gap between inner arc plate and the inner chamber gripper shoe of control conical plug welding hole position.
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 assembling structural representation 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 partial enlargement structural representation at B place in Fig. 5.
Detailed description of the invention
See Fig. 4, Fig. 5 and Fig. 6, a kind of welding method 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 adopting the method that plug welding connects hollow stationary blade of steam turbine body and inner chamber gripper shoe to be welded to connect, the processing step that its concrete plug welding connects is as follows:
(1) prepare before weldering: first adopt the mode of machinery Milling Machining on the inner arc plate 3 of hollow stationary blade according to designing requirement, conical plug welding hole is processed with the welding position of 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, the present embodiment is processed a, b, c, d, e, f, g, h is totally 8 conical plug welding holes, and ensure that the gap between hollow stationary blade inner arc plate and the inner chamber gripper shoe of 8 conical plug welding hole positions is 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 sequentially carried out bottoming and weld, ensureing root penetration, 8 conical plug welding holes after then successively bottoming being welded by said sequence again carry out weld seam filling till being filled up by each conical plug welding hole;
(3) postwelding inspection: after 8 weld zone cools to room temperature, each welded seam area is polishing to and hollow stationary blade outer surface smoother transition, and each welding region is carried out visual detection (VT) and pigmentation and innltration test (PT), it is ensured that weld seam pore-free, crackle, be mingled with, the defect such as slag inclusion;
(4) repair welding: the part of butt welded seam region existing defects, carbide rotary tool cutter is adopted to be excavated by defect part, after removing surface and use argon-arc welding gun that the region after excavating is carried out repair welding, is polished and defects detection in repair welding region again after repair welding position cools down, if still defective, continue this defect area is excavated rear repair welding, till weld is accepted.
In Fig. 4,4 is the back of the body arc plate of hollow stationary blade.
Below for conical plug welding hole d place in embodiment, specifically describe the operation process of plug welding welding and repair welding in the inventive method:
Embodiment one:
First conical plug welding hole d is carried out bottoming welding, the pure argon adopting purity to be >=99.99% is as protection gas, argon flow amount is 12L/min, welding current 90A, weldingvoltage 13V, wire feed rate 13mm/min, adopt diameter of phi 1.0 308LSi(ISO14343-B) welding wire carry out bottoming filling, welding wire, root through welding is sent less during bottoming;
Then the conical plug welding hole after again backing welding being connect carries out plug welding welding until being filled up by conical plug welding hole, adopting diameter during plug welding welding is the 308LSi(ISO14343-B of Φ 2.0) welding wire carries out plug welding, welding current 110A, weldingvoltage 12V, the pure argon adopting purity to be >=99.99% is as protection gas, and argon flow amount is 12L/min;
When defect part is carried out repair welding, adopt argon-arc welding gun at described defect part repair welding, repair welding electric current: 140A; repair welding voltage: 12V; the 308LSi(ISO14343-B that welding wire adopts diameter to be Φ 2.0), protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
Embodiment two:
First conical plug welding hole d is carried out bottoming welding, the pure argon adopting purity to be >=99.99% is as protection gas, argon flow amount is 12L/min, welding current 100A, weldingvoltage 12V, wire feed rate 20mm/min, adopting diameter is the 308LSi(ISO14343-B of Φ 1.2) welding wire carry out bottoming filling, welding wire, root through welding is sent less during bottoming;
Then the conical plug welding hole after again backing welding being connect carries out plug welding welding until being filled up by conical plug welding hole, adopting diameter during plug welding welding is the 308LSi(ISO14343-B of Φ 2.0) welding wire carries out plug welding, welding current 120A, weldingvoltage 13V, the pure argon adopting purity to be >=99.99% is as protection gas, and argon flow amount is 12L/min;
When defect part is carried out repair welding, adopt argon-arc welding gun at described defect part repair welding, repair welding electric current: 130A; repair welding voltage: 13V; the 308LSi(ISO14343-B that welding wire adopts diameter to be Φ 2.0), protection gas adopts purity >=99.99% pure argon, and argon flow amount is 12L/min.
Embodiment three:
First conical plug welding hole d is carried out bottoming welding, the pure argon adopting purity to be >=99.99% is as protection gas, argon flow amount is 12L/min, welding current 95A, weldingvoltage 14V, wire feed rate 5mm/min, adopt diameter of phi 1.0 308LSi(ISO14343-B) welding wire carry out bottoming filling, welding wire, root through welding is sent less during bottoming;
Then the conical plug welding hole after again backing welding being connect carries out plug welding welding until being filled up by conical plug welding hole, adopting diameter during plug welding welding is the 308LSi(ISO14343-B of Φ 2.0) welding wire carries out plug welding, welding current 100A～120A, weldingvoltage 12V～14V, the pure argon adopting purity to be >=99.99% is as protection gas, and argon flow amount is 12L/min;
When defect part is carried out repair welding; adopt argon-arc welding gun in described defect part repair welding; repair welding electric current: 130A～140A; repair welding voltage: 12V～14V; the 308LSi(ISO14343-B that welding wire adopts diameter to be Φ 2.0); 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 body and inner chamber gripper shoe are assembled to finished product position, then adopting the method that plug welding connects hollow stationary blade of steam turbine body and inner chamber gripper shoe to be welded to connect, it comprises the following steps that:
(1) prepare before weldering: first on the inner arc plate of hollow stationary blade body and the welding position processing plug welding groove of inner chamber gripper shoe, then described groove is cleared up, remove groove face oxide layer or remelted layer, greasy dirt and dirt;
(2) plug welding welding: adopt argon tungsten-arc welding bottoming welding, it is ensured that root penetration, then refills the above groove of described bottoming welding until being filled up by described groove;
(3) postwelding inspection: treat that welded seam area is cooled to room temperature, described groove of polishing is to seamlessly transitting with described hollow stationary blade body outer surface, and detects the presence of weld defect;
(4) repair welding: to described welded seam area existing defects part, described defect part is excavated and uses argon arc welding that the region after excavating is refilled welding fluid, the method being again with described step (3) after refilling position cooling checks, till 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 D1 of described conical plug welding hole is Φ 4 ± 0.5mm, and apical pore diameter D2 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, it is characterised in that: the clearance control between inner arc plate and the described inner chamber gripper shoe of described conical plug welding hole position is at 0～1.5mm.
4. the welding method of a kind of hollow stationary blade of steam turbine body according to Claims 2 or 3 and inner chamber gripper shoe, it is characterized in that: the bottoming welding in described step (2), adopt argon arc welding machine that described conical plug welding hole is carried out bottoming welding, the pure argon adopting purity to be >=99.99% is as protection gas, pure argon flow is 12L/min, welding current 90A～100A, weldingvoltage 12V～14V, wire feed rate 5mm/min～20mm/min, the 308LSi type welding wire adopting diameter of phi 1.0mm or Φ 1.2mm carries out bottoming filling, welding wire is sent less during bottoming, 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: the operation filling the above groove diameter of described bottoming welding in described step (2) is; the 308LSi type welding wire adopting diameter to be Φ 2.0mm carries out plug welding; welding current 100A～120A; weldingvoltage 12V～14V; the pure argon adopting purity to be >=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 visual detection and pigmentation and innltration test, it is ensured that weld seam pore-free, crackle, be mingled with, dreg defect.
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 existed; carbide rotary tool cutter is adopted to excavate totally by described defect part; adopt argon-arc welding gun in described defect part repair welding after removing surface; repair welding electric current: 130A～140A; repair welding voltage: 12V～14V; the 308LSi type welding wire that welding wire adopts diameter to be Φ 2.0mm; 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: when described plug welding position is provided with multiple, when carrying out described step (2) successively by described hollow stationary blade body blade root end, integral shroud end plug welding position successively plug welding position to the inside carry out plug welding welding.
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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 true CN103658939B (en) | 2016-06-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104476076B (en) * | 2014-11-29 | 2015-12-16 | 无锡透平叶片有限公司 | The positioning clamp for spot welding device of hollow blade |
| CN110153807B (en) * | 2019-03-29 | 2021-06-08 | 武汉船用机械有限责任公司 | Repair welding repair method for taper hole |
| 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 |
| 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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