CN110000522A - A kind of welding method of complete penetraction and fusion in welding impeller - Google Patents
A kind of welding method of complete penetraction and fusion in welding impeller Download PDFInfo
- Publication number
- CN110000522A CN110000522A CN201910358268.5A CN201910358268A CN110000522A CN 110000522 A CN110000522 A CN 110000522A CN 201910358268 A CN201910358268 A CN 201910358268A CN 110000522 A CN110000522 A CN 110000522A
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- Prior art keywords
- welding
- impeller
- groove
- fusion
- blade
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
Abstract
The invention discloses a kind of welding methods of complete penetraction and fusion in welding impeller, it is characterised in that the following steps are included: step 1: retaining wall on slope is carried out at hub disk side, hub disk sawtooth by shroud side, front side of vane to blade non-working surface respectively；Step 2: by blade, shroud and hub disk combination forming；Step 3: groove side carries out bottoming, filling and capping to weld seam using carbon dioxide gas arc welding；Step 4: groove processed is opened by carbon arc air gouging in the non-groove side of blade, then carries out grinding process；Step 5: non-groove side carries out grinding process after the completion of bottoming using manual bottoming, is then filled using carbon dioxide gas arc welding, capping；Step 6: integrally annealed destressing processing is carried out to impeller after the completion of welding；Step 7: postwelding defect detecting test is integrally carried out to impeller using ultrasonic wave and magnetic powder.The present invention delays the speed of damage in impeller, to increase the service life of impeller by the intensity of promotion weld seam.
Description
Technical field
The present invention relates to a kind of welding methods, and in particular to a kind of welding method of complete penetraction and fusion in welding impeller.
Background technique
The welding of industrial centrifugal draught fan impeller is all made of the connection type of fillet weld at present, since impeller is by shroud, leaf
Piece and hub disk are combined into an enclosure space, and space is smaller, so all manufacture crafts are all made of the welding of non-penetration at present
Process implementing.It is especially severe in operating condition but since the welding manner using non-penetration will lead to the intensity decline of commissure
Place (place for for example having abrasion or corrosion), impeller run when welded seam area be to be worn or corrode at first, due to
Without the technique using complete penetraction and fusion in welding inside weld seam, it will lead to blade since intensity not enough causes runaway accident, to personal safety, set
Standby safety and property bring loss.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of welding methods of complete penetraction and fusion in welding impeller, by promoting the strong of weld seam
Degree, delays the speed of damage in impeller, to increase the service life of impeller.
In order to solve the above technical problems, the present invention adopts the following technical scheme that: a kind of weldering of complete penetraction and fusion in welding impeller of the invention
Connect method, innovative point be the following steps are included:
Step 1: respectively groove is carried out by shroud side, front side of vane to blade non-working surface at hub disk side, hub disk sawtooth and added
Work；
Step 2: integral reinforcing is carried out to impeller using rigid support, blade is reinforced using gusset and support combinations, is adopted
Shroud is reinforced with technique circle；Then by blade, shroud and hub disk combination forming；
Step 3: grinding process is carried out to the groove side region 50mm until exposing metallic luster before welding, then groove side uses
Carbon dioxide gas arc welding carries out bottoming, filling and capping to weld seam；
Step 4: groove processed is opened by carbon arc air gouging in the non-groove side of blade, then carries out grinding process；
Step 5: non-groove side carries out grinding process after the completion of bottoming using manual bottoming, is then protected using carbon dioxide gas
Shield weldering be filled, capping；
Step 6: integrally annealed destressing processing is carried out to impeller after the completion of welding；
Step 7: postwelding defect detecting test is integrally carried out to impeller using ultrasonic wave and magnetic powder.
Preferably, in said step 1, blade non-working surface opens the unilateral groove of system by shroud side, and its bevel angle is
50 °, root face 0.5mm；Front side of vane opens the unilateral groove of system by hub disk side, and its bevel angle is 50 °, root face 2mm.
Preferably, in said step 1, K-type asymmetric groove processed, and the groove of its big groove side are opened at hub disk sawtooth
Angle is 45 °, and the bevel angle of small groove side is 55 °, root face 2mm.
Preferably, in the step 2, the tack welding of blade is welded on non-groove side, and the tack welding of hub disk is welded on
Small groove side；And in tack welding, using manual electric arc welding, the welding rod of φ 4.0, electricity when welding current is than normal weld are selected
It flows big by 15% ~ 20%.
Preferably, in the step 3, the pre-heat treatment is carried out to groove and its two sides using oxy-acetylene rifle before welding,
It asks and is heated to 150 DEG C, remove the water stain and grease stain of groove and its two sides.
Preferably, it in the step 3, needs to carry out grinding process after the completion of weld seam bottoming until exposing metallic luster, so
After be filled, filling after the completion of carry out again grinding process until expose metallic luster, finally carry out covering welding.
Preferably, in the step 4, the U-shaped groove of system is opened using carbon arc air gouging in the non-groove side of blade, then carries out root
Portion's back chipping, and grinding process is until expose metallic luster.
Preferably, in the step 5, the welding rod of φ 3.2 is selected in bottoming, and welding current is 100 ~ 115A, and bottoming is completed
Grinding process is carried out afterwards until exposing metallic luster.
Preferably, in the step 6, impeller is whole to be warming up to 560 DEG C with furnace, then keeps 560 DEG C of in-furnace temperatures 4
Hour, then cool to 200 DEG C with the furnace, finally coming out of the stove, it is air-cooled to carry out.
Preferably, in the step 7, with polishing wheel to weld seam and welding bead two sides polishing grinding, then on the inside of weld seam
Ultrasonic examination inspection is carried out, magnetic particle testing then is carried out to surface.
The invention has the following advantages:
1) present invention fills capping using carbon dioxide gas arc welding, effectively increases welding efficiency.
2) present invention delays damage in impeller speed, to increase the service life of impeller by the intensity of promotion weld seam.
3) present invention ensures the stability of product quality using reasonable welding procedure.
Detailed description of the invention
It, below will be to needed in the embodiment in order to more clearly illustrate the technical solution in the embodiment of the present invention
Attached drawing is simply introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments recorded in the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of impeller in the present invention.
Fig. 2 is the hub disk groove schematic diagram in Fig. 1.
Fig. 3 is the blade groove schematic diagram in Fig. 1.
Fig. 4 is the front view of the blade stiffening plate in Fig. 1.
Fig. 5 is the side view of the blade stiffening plate in Fig. 1.
Fig. 6 is the welding schematic diagram of the part A-A in Fig. 4.
Fig. 7 is the welding schematic diagram of the part B-B in Fig. 5.
Wherein, 1- shroud；2- hub disk；3- blade；4- stiffening plate.
Specific embodiment
Technical solution of the present invention will be clearly and completely described by specific embodiment below.
The welding method of a kind of complete penetraction and fusion in welding impeller of the invention, as shown in Fig. 1 ~ 7, comprising the following steps:
Step 1: 3 non-working surface of blade is carried out at 2 side of hub disk, 2 sawtooth of hub disk by 1 side of shroud, 3 working face of blade respectively
Retaining wall on slope.
In above-mentioned steps, 3 non-working surface of blade opens the unilateral groove of system by 1 side of shroud, and its bevel angle is 50 °, blunt
While being 0.5mm；3 working face of blade opens the unilateral groove of system by 2 side of hub disk, and its bevel angle is 50 °, root face 2mm；Due to weldering
Connect the consistent of loading, it is possible to reduce the deformation after blade welding.
Hub disk 2 is since plate thickness opens K-type asymmetric groove processed at 2 sawtooth of hub disk, and the bevel angle of its big groove side is
45 °, the bevel angle of small groove side is 55 °, root face 2mm.
Step 2: integral reinforcing is carried out to impeller using rigid support, is deformed after preventing impeller welding；Using gusset
Blade 3 is reinforced with support combinations；Shroud 1 is reinforced using technique circle；Then by blade 3, shroud 1 and hub disk 2
Combination forming.
In above-mentioned steps, to prevent 3 verticality of blade from welding deformation occurs, two are installed on the working face of blade 3
Stiffening plate 4, and fixed by spot welding.
The tack welding of blade 3 is welded on non-groove side, and the tack welding of hub disk 2 is welded on small groove side；Wherein, it is positioning
When weldering, using manual electric arc welding, the welding rod of φ 4.0 is selected, electric current when welding current is than normal weld is big by 15% ~ 20%.
Step 3: grinding process is carried out to the groove side region 50mm before welding until exposing metallic luster, then groove side
Bottoming, filling and capping are carried out to weld seam using carbon dioxide gas arc welding.
In above-mentioned steps, the pre-heat treatment is carried out to groove and its two sides using oxy-acetylene rifle before welding, it is desirable that be heated to
150 DEG C, remove the water stain and grease stain of groove and its two sides.
It needs to carry out grinding process after the completion of weld seam bottoming until exposing metallic luster, is then filled, after the completion of filling
Grinding process is carried out again until exposing metallic luster, finally carries out covering welding.
Step 4: groove processed is opened by carbon arc air gouging in the non-groove side of blade 3, then carries out grinding process.
In above-mentioned steps, the U-shaped groove of system is opened using carbon arc air gouging in the non-groove side of blade 3, then carries out root back chipping, and
Grinding process is carried out with metal gas bistrique until exposing metallic luster.
Step 5: non-groove side carries out grinding process after the completion of bottoming using manual bottoming, then uses carbon dioxide gas
Body protection weldering be filled, capping.
In above-mentioned steps, the welding rod of φ 3.2 is selected in bottoming, and welding current is 100 ~ 115A, is beaten after the completion of bottoming
Mill processing is until expose metallic luster.
Step 6: integrally annealed destressing processing is carried out to impeller after the completion of welding.
In above-mentioned steps, impeller is whole to be warming up to 560 DEG C with furnace, then keeps 560 DEG C in-furnace temperature 4 hours, then
Cool to 200 DEG C with the furnace, finally coming out of the stove, it is air-cooled to carry out, and does not allow that there are moving airs in cooling procedure；Wherein, all technique branch
Support it is to be heated after dismantled.
Step 7: postwelding defect detecting test is integrally carried out to impeller using ultrasonic wave and magnetic powder.
It is then ultrasonic to being carried out on the inside of weld seam with polishing wheel to weld seam and welding bead two sides polishing grinding in above-mentioned steps
Wave inspection inspection then carries out magnetic particle testing to surface.
Beneficial effects of the present invention:
1) present invention fills capping using carbon dioxide gas arc welding, effectively increases welding efficiency.
2) present invention delays damage in impeller speed, to increase the service life of impeller by the intensity of promotion weld seam.
3) present invention ensures the stability of product quality using reasonable welding procedure.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to design of the invention
It is defined with range, without departing from the design concept of the invention, ordinary engineering and technical personnel is to this hair in this field
The all variations and modifications that bright technical solution is made should all fall into protection scope of the present invention, claimed skill of the invention
Art content is all documented in technical requirements book.
Claims (10)
1. a kind of welding method of complete penetraction and fusion in welding impeller, it is characterised in that the following steps are included:
Step 1: respectively groove is carried out by shroud side, front side of vane to blade non-working surface at hub disk side, hub disk sawtooth and added
Work；
Step 2: integral reinforcing is carried out to impeller using rigid support, blade is reinforced using gusset and support combinations, is adopted
Shroud is reinforced with technique circle；Then by blade, shroud and hub disk combination forming；
Step 3: grinding process is carried out to the groove side region 50mm until exposing metallic luster before welding, then groove side uses
Carbon dioxide gas arc welding carries out bottoming, filling and capping to weld seam；
Step 4: groove processed is opened by carbon arc air gouging in the non-groove side of blade, then carries out grinding process；
Step 5: non-groove side carries out grinding process after the completion of bottoming using manual bottoming, is then protected using carbon dioxide gas
Shield weldering be filled, capping；
Step 6: integrally annealed destressing processing is carried out to impeller after the completion of welding；
Step 7: postwelding defect detecting test is integrally carried out to impeller using ultrasonic wave and magnetic powder.
2. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in said step 1,
Blade non-working surface opens the unilateral groove of system by shroud side, and its bevel angle is 50 °, root face 0.5mm；Front side of vane is rearward
The unilateral groove of system is opened in disk side, and its bevel angle is 50 °, root face 2mm.
3. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in said step 1,
K-type asymmetric groove processed is opened at hub disk sawtooth, and the bevel angle of its big groove side is 45 °, the bevel angle of small groove side is
55 °, root face 2mm.
4. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 2,
The tack welding of blade is welded on non-groove side, and the tack welding of hub disk is welded on small groove side；And in tack welding, using craft
Arc welding, selects the welding rod of φ 4.0, and electric current when welding current is than normal weld is big by 15% ~ 20%.
5. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 3,
The pre-heat treatment is carried out to groove and its two sides using oxy-acetylene rifle before welding, it is desirable that be heated to 150 DEG C, remove groove and its two sides
Water stain and grease stain.
6. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 3,
It needs to carry out grinding process after the completion of weld seam bottoming up to exposing metallic luster, is then filled, is beaten again after the completion of filling
Mill processing finally carries out covering welding until exposing metallic luster.
7. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 4,
The U-shaped groove of system is opened using carbon arc air gouging in the non-groove side of blade, then carries out root back chipping, and grinding process is until expose metal light
Pool.
8. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 5,
The welding rod of φ 3.2 is selected in bottoming, and welding current is 100 ~ 115A, carries out grinding process after the completion of bottoming until exposing metal light
Pool.
9. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 6,
Impeller is whole to be warming up to 560 DEG C with furnace, then keeps 560 DEG C in-furnace temperature 4 hours, then cools to 200 DEG C with the furnace, finally go out
Furnace carries out air-cooled.
10. a kind of welding method of complete penetraction and fusion in welding impeller according to claim 1, it is characterised in that: in the step 7,
With polishing wheel to weld seam and welding bead two sides polishing grinding, then to ultrasonic examination inspection is carried out on the inside of weld seam, then to surface
Carry out magnetic particle testing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358268.5A CN110000522B (en) | 2019-04-30 | 2019-04-30 | Welding method of full penetration impeller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358268.5A CN110000522B (en) | 2019-04-30 | 2019-04-30 | Welding method of full penetration impeller |
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| CN110000522A true CN110000522A (en) | 2019-07-12 |
| CN110000522B CN110000522B (en) | 2021-07-20 |
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| CN201910358268.5A Active CN110000522B (en) | 2019-04-30 | 2019-04-30 | Welding method of full penetration impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918628A (en) * | 2022-06-20 | 2022-08-19 | 江苏金通灵鼓风机有限公司 | Manufacturing method of large closed tungsten carbide abrasion-proof impeller |
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| CN104439635A (en) * | 2014-11-14 | 2015-03-25 | 句容五星机械制造有限公司 | Agitator blade welding process based on CO2 welding and manual welding |
| EP3023191A1 (en) * | 2014-11-20 | 2016-05-25 | Siemens Aktiengesellschaft | Turbine blade made of two parts |
| US20170022827A1 (en) * | 2015-07-23 | 2017-01-26 | Honeywell International Inc. | Hybrid bonded turbine rotors and methods for manufacturing the same |
| CN106513998A (en) * | 2017-01-05 | 2017-03-22 | 机械科学研究总院青岛分院 | Laser welding method for titanium alloy blade |
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2019
- 2019-04-30 CN CN201910358268.5A patent/CN110000522B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600485A (en) * | 2004-10-20 | 2005-03-30 | 南通金通灵风机有限公司 | Method for welding impellers in high strength and eliminating stress of impellers |
| CN1880776A (en) * | 2005-06-15 | 2006-12-20 | 赵世臣 | Process for producing fan impeller |
| CN1811196A (en) * | 2006-03-03 | 2006-08-02 | 山东大学 | Technological process of making wing type centrifugal vane whell |
| CN102764964A (en) * | 2012-08-03 | 2012-11-07 | 中冶南方(武汉)威仕工业炉有限公司 | Method for producing bell type furnace high-temperature circular fan impeller |
| CN104439635A (en) * | 2014-11-14 | 2015-03-25 | 句容五星机械制造有限公司 | Agitator blade welding process based on CO2 welding and manual welding |
| EP3023191A1 (en) * | 2014-11-20 | 2016-05-25 | Siemens Aktiengesellschaft | Turbine blade made of two parts |
| US20170022827A1 (en) * | 2015-07-23 | 2017-01-26 | Honeywell International Inc. | Hybrid bonded turbine rotors and methods for manufacturing the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918628A (en) * | 2022-06-20 | 2022-08-19 | 江苏金通灵鼓风机有限公司 | Manufacturing method of large closed tungsten carbide abrasion-proof impeller |
| CN114918628B (en) * | 2022-06-20 | 2023-09-15 | 江苏金通灵鼓风机有限公司 | Manufacturing method of large closed tungsten carbide wear-resistant impeller |
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| Publication number | Publication date |
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| CN110000522B (en) | 2021-07-20 |
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