CN114147407A - Fan impeller penetration welding positioning device - Google Patents
Fan impeller penetration welding positioning device Download PDFInfo
- Publication number
- CN114147407A CN114147407A CN202111483591.9A CN202111483591A CN114147407A CN 114147407 A CN114147407 A CN 114147407A CN 202111483591 A CN202111483591 A CN 202111483591A CN 114147407 A CN114147407 A CN 114147407A
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- positioning
- welded
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- 238000003466 welding Methods 0.000 title claims abstract description 47
- 230000035515 penetration Effects 0.000 title claims abstract description 26
- 210000004907 gland Anatomy 0.000 claims abstract description 39
- 239000011324 bead Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a penetration welding positioning device for a fan impeller, which comprises a bottom plate, a positioning ring, a chuck assembly, an elastic positioning assembly and a gland assembly, wherein the bottom plate is provided with a positioning hole; the blades to be welded of the impeller are vertically placed in the clamping grooves, and the blades to be welded are tightly pressed on the inner walls of the clamping grooves through the elastic positioning components, so that the blades to be welded are positioned; then, a wheel disc to be welded of the impeller is placed in the positioning ring, the positioning ring is used for positioning the wheel disc to be welded, the wheel disc to be welded is pressed downwards on the blade to be welded through the pressing cover component, the blade to be welded is ensured to be in close contact with the lower end face of the wheel disc to be welded, and after the mutual position fixation of the wheel disc to be welded and the blade is completed, the subsequent welding work is carried out; the invention has simple structure, convenient and quick blade clamping and high positioning precision.
Description
Technical Field
The invention relates to the field of welding tools, in particular to a penetration welding positioning device for a fan impeller.
Background
The fan impeller consists of blades, wheel discs to be welded, a rear wheel disc and a hub. For welding the impeller, arc welding is generally adopted at present, after the arc welding, the welding seams of the blades, the front wheel disc and the rear wheel disc are generally fillet welding, and the positioning tool for welding cannot meet the positioning requirement of T-shaped penetration welding.
In summary, there is a need for a penetration welding positioning device for a fan impeller to solve the problem of difficult positioning in the prior art.
Disclosure of Invention
The invention aims to provide a penetration welding positioning device for a fan impeller, which aims to solve the problem that penetration welding is difficult to position in the prior art, and the specific technical scheme is as follows:
a penetration welding positioning device for a fan impeller comprises a bottom plate, a positioning ring, a chuck assembly, an elastic positioning assembly and a gland assembly; the positioning ring is arranged on the bottom plate and used for positioning the wheel disc to be welded; the chuck assembly is arranged in the positioning ring and is coaxial with the positioning ring; a clamping groove is formed in the chuck component; the blade to be welded is arranged in the clamping groove; the elastic positioning assembly is arranged on the bottom plate and used for pressing the blades to be welded in the clamping grooves; the gland assembly is arranged on the chuck assembly and used for pressing the wheel disc to be welded on the blade to be welded.
Above technical scheme is preferred, the inner wall of holding ring is equipped with location portion, treats the location of welding the blade through location portion, chuck subassembly and elastic locating component realization.
Above technical scheme is preferred, location portion, chuck subassembly and elastic locating component and the blade one-to-one setting of waiting to weld.
Above technical scheme is preferred, the draw-in groove is first locating surface with the contact surface of treating the welding blade, and the contact surface of location portion and blade is the second locating surface, and first locating surface and second locating surface are in same vertical plane.
Preferably, the chuck assembly comprises a first connecting column, an upper chuck and a lower chuck; the first connecting column is arranged on the bottom plate; go up chuck and lower chuck and all coaxial setting on first connecting post, and go up chuck and lower chuck and all be equipped with the draw-in groove.
Above technical scheme is preferred, be equipped with the mounting groove on the bottom plate, first spliced pole threaded connection is in the mounting groove, and first spliced pole sets up with the holding ring is coaxial.
Preferably, in the above technical solution, the elastic positioning assembly includes a mounting block and an elastic positioning bead; the mounting block is arranged on the bottom plate; the elastic positioning beads are arranged on the mounting block and used for pressing the to-be-welded blade.
Preferably, the gland assembly comprises a second connecting column, a gland and a threaded locking piece; the second connecting column is arranged on the chuck assembly; the gland slides and sets up on the second spliced pole, and screw retaining member and second spliced pole screw-thread fit, screw retaining member are used for driving the gland and treat the welded wheel dish contact.
Above technical scheme is preferred, second spliced pole and chuck subassembly threaded connection, and the coaxial setting of second spliced pole and chuck subassembly.
According to the preferable technical scheme, the lower end of the gland is provided with a limiting bulge; the wheel disc to be welded is provided with a matching hole matched with the limiting protrusion.
The technical scheme of the invention has the following beneficial effects:
(1) the blower impeller penetration welding positioning device comprises a bottom plate, a positioning ring, a chuck assembly, an elastic positioning assembly and a gland assembly; the blades to be welded of the impeller are vertically placed in the clamping grooves, and the blades to be welded are tightly pressed on the inner walls of the clamping grooves through the elastic positioning components, so that the blades to be welded are positioned; then, a wheel disc to be welded of the impeller is placed in the positioning ring, the positioning ring is used for positioning the wheel disc to be welded, the wheel disc to be welded is pressed downwards on the blade to be welded through the pressing cover component, the blade to be welded is ensured to be in close contact with the lower end face of the wheel disc to be welded, and after the mutual position fixation of the wheel disc to be welded and the blade is completed, the subsequent welding work is carried out; the invention has simple structure, convenient and quick blade clamping and high positioning precision.
(2) According to the invention, the positioning of the blade to be welded is realized through the positioning part, the chuck assembly and the elastic positioning assembly, the stability of the positioned blade to be welded is strong, and the welding precision is high; the positioning part, the chuck assembly and the elastic positioning assembly are arranged in a one-to-one correspondence manner with the blades to be welded, so that the clamping requirements of multiple groups of blades to be welded on specific angles, specific sizes and positions can be met.
(3) The first positioning surface and the second positioning surface are positioned in the same vertical surface, so that the blade to be welded can be ensured to be in a vertical state, the blade to be welded and the wheel disc to be welded are connected in a T shape, and the precision of T-shaped penetration welding is ensured.
(4) The chuck assembly of the invention comprises a first connecting column, an upper chuck and a lower chuck; by arranging the upper and lower groups of chucks, the stability of the blade to be welded can be ensured from the upper and lower ends; first spliced pole passes through threaded connection on the bottom plate, is convenient for install fast and dismantles.
(5) The elastic positioning assembly comprises a mounting block and an elastic positioning bead; the elastic positioning balls on the mounting block compress the to-be-welded blade on the first positioning surface and the second positioning surface through elastic force, so that the stability of the to-be-welded blade is guaranteed, and the clamping is convenient.
(6) The gland assembly comprises a second connecting column, a gland and a thread locking piece, and the gland assembly is screwed downwards through the thread locking piece so as to drive the gland to tightly press the wheel disc to be welded on the blade to be welded and ensure the stability of the mutual positions of the wheel disc to be welded and the blade to be welded; the second connecting column is in threaded connection with the upper chuck, so that the quick assembly and disassembly are convenient.
(7) The lower end of the gland is provided with the limiting bulge, and when the gland moves downwards, the limiting bulge is inserted into the matching hole in the wheel disc to be welded, so that the wheel disc to be welded can be limited, and the stability of the wheel disc to be welded in welding is ensured.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural diagram of a penetration welding positioning device for a fan impeller according to the present embodiment;
FIG. 2 is a top view of FIG. 1 (without showing the gland and the blades to be welded);
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a schematic view of a blade to be welded mounted in a pocket;
FIG. 5 is a schematic view of a wheel disc to be welded mounted on a positioning device;
wherein, 1, a bottom plate; 2. a positioning ring; 2.1, a positioning part; 2.1a, a second positioning surface; 3.a chuck assembly; a, a clamping groove; 3, a1, a first locating surface; 3.1, a first connecting column; 3.2, mounting a chuck; 3.3, a lower chuck; 4. an elastic positioning component; 4.1, mounting blocks; 4.2, elastic positioning beads; 5. a gland assembly; 5.1, a second connecting column; 5.2, pressing a cover; 5.21, limiting bulges; 5.3, a threaded locking piece; 6. a blade to be welded; 7. the wheel disc is to be welded.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example (b):
a penetration welding positioning device for a fan impeller comprises a bottom plate 1, a positioning ring 2, a chuck assembly 3, an elastic positioning assembly 4 and a gland assembly 5, as shown in fig. 1 to 3, the penetration welding positioning device specifically comprises the following components:
as shown in fig. 1 and 2, the base plate 1 is a circular plate for mounting various components. The positioning ring 2 is arranged on the bottom plate 1 and is coaxial with the bottom plate 1, and the positioning ring 2 is used for positioning and mounting a wheel disc 7 to be welded (namely a front wheel disc of the impeller) during welding; the inner diameter of the positioning ring 2 is consistent with the outer diameter of the wheel disc 7 to be welded, so that the wheel disc to be welded can be positioned conveniently. Preferably, the positioning ring 2 is detachably arranged on the bottom plate 1.
As shown in fig. 1, the chuck assembly 3 is disposed in the positioning ring 2, and the chuck assembly 3 is disposed coaxially with the positioning ring 2; be equipped with draw-in groove 3.a on the chuck subassembly 3, the installation that draw-in groove 3.a is used for treating welding blade 6 is fixed, specifically is: the chuck assembly 3 comprises a first connecting column 3.1, an upper chuck 3.2 and a lower chuck 3.3; an installation groove is formed in the center of the bottom plate 1, and the first connecting column 3.1 is in threaded connection in the installation groove; the upper chuck 3.2 and the lower chuck 3.3 are both arranged on the first connecting column 3.1, and the first connecting column 3.1, the upper chuck 3.2, the lower chuck 3.3, the positioning ring 2 and the bottom plate 1 are all coaxially arranged; go up chuck 3.2 and lower chuck 3.3 and all be equipped with draw-in groove 3.a, go up chuck 3.2 and lower chuck 3.3's draw-in groove 3.a along vertical one-to-one setting, the quantity of preferred draw-in groove 3.a with wait to weld 6 quantity unanimous of blade, multiunit draw-in groove 3.a sets up along the circumference of chuck.
As shown in fig. 1 and 2, the elastic positioning components 4 are arranged in one-to-one correspondence with the slots 3.a, and the elastic positioning components 4 press the blades in the slots 3.a against the inner wall surface (i.e. the first positioning surface 3.a1) of the slots 3.a, specifically: the elastic positioning assembly 4 comprises a mounting block 4.1 and an elastic positioning bead 4.2, the mounting block 4.1 is mounted on the bottom plate 1, the elastic positioning bead 4.2 is mounted on the mounting block 4.1, the blade to be welded is clamped between the inner wall surfaces of the elastic positioning bead 4.2 and the clamping groove 3.a, and the blade to be welded is pressed on the inner wall surface of the clamping groove 3.a through the elastic positioning bead 4.2, so that the blade to be welded is vertically and stably arranged in the clamping groove 3. a. Preferably, the mounting block 4.1 is detachably mounted on the base plate 1, here in a detachable manner, for example by means of a screw connection. The resilient location bead 4.2 is referred to the existing location bead structure.
Preferably, as shown in fig. 2 and 4, a positioning portion 2.1 is provided on an inner wall of the positioning ring 2, the positioning portion 2.1 is provided along a circumferential direction of the positioning ring 2, and the positioning portion 2.1 and the clamping groove 3.a are provided in a one-to-one correspondence manner, and the positioning of the blade to be welded is realized by the positioning portion 2.1, the chuck assembly 3 (specifically, the clamping groove 3.a) and the elastic positioning assembly 4, specifically: the clamping groove 3.a and the contact surface of the blade to be welded are a first positioning surface 3.a1, the positioning part 2.1 and the surface of the blade to be welded are a second positioning surface 2.1a, the first positioning surface 3.a1 and the second positioning surface 2.1a are located on the same vertical plane, one side surface of the blade to be welded is attached to the vertical plane, the blade to be welded is pressed on the vertical plane through the elastic positioning beads 4.2, after the blade to be welded and the wheel disc to be welded are installed, the blade and the lower end surface of the wheel disc to be welded are in contact, and subsequent penetrating welding is facilitated.
As shown in fig. 1, 3 and 5, the gland assembly 5 is used for pressing a wheel disc to be welded on a blade to be welded, specifically: the gland assembly 5 comprises a second connecting column 5.1, a gland 5.2 and a threaded locking piece 5.3 (such as a nut);
second spliced pole 5.1 sets up on last chuck 3.2, second spliced pole 5.1 and the coaxial setting of last chuck 3.2, gland 5.2 is equipped with the centre bore, second spliced pole 5.1 runs through the centre bore setting of gland 5.2, treat that the rim plate is located between chuck 3.2 and the gland 5.2, threaded locking part 5.3 threaded connection is on second spliced pole 5.1, precession through threaded locking part 5.3, thereby drive gland 5.2 downstream, make and treat that the rim plate compresses tightly on treating the welding blade.
Preferably, the second spliced pole 5.1 can be dismantled and set up on last chuck 3.2, and the detachable mode is: the center of the upper chuck 3.2 is provided with a thread groove, and the second connecting column 5.1 is in threaded connection in the thread groove.
Preferably, as shown in fig. 3, the lower end of the gland 5.2 is provided with a cylindrical limiting protrusion 5.21, the center of the wheel disc to be welded is provided with a matching hole, and the limiting protrusion 5.21 is in clearance fit with the matching hole, that is, when the gland 5.2 moves downwards, the limiting protrusion 5.21 can be inserted into the matching hole, so as to limit the horizontal deviation of the wheel disc to be welded.
The working process of the penetration welding positioning device for the fan impeller of the embodiment is as follows:
1. selecting a chuck assembly 3 according to the number of blades to be welded of the fan (namely the number of the clamping grooves 3.a on the upper chuck 3.2 and the lower chuck 3.3 is the same as that of the blades to be welded), and installing a first connecting column 3.1 of the chuck assembly 3 on the bottom plate 1;
2. as shown in fig. 4, the blade to be welded is vertically inserted into the slot 3.a, the side surface of the blade to be welded is attached to the first positioning surface 3.a1 (i.e. the inner wall surface) of the slot 3.a and the second positioning surface 2.1a of the positioning part 2.1, and then the blade to be welded is pressed against the first positioning surface 3.a1 and the second positioning surface 2.1a by the elastic positioning bead 4.2;
3. as shown in fig. 5, after all the blades to be welded are clamped, the second connecting column 5.1 of the gland component 5 is connected with the upper chuck 3.2, and then the wheel disc to be welded of the impeller is placed on the blades to be welded (at this time, the wheel disc to be welded is coaxial with the second connecting column 5.1); gland 5.2 is installed and is being treated the upper end of welding wheel disc, through the screw retaining member 5.3 precession downwards, drives gland 5.2 downstream to make the spacing arch 5.21 of gland 5.2 lower extreme insert treat the cooperation hole of welding wheel disc, and treat the welding wheel disc and treat welding blade in close contact with, screw retaining member 5.3 and gland 5.2 realize treating the stable back of welding wheel disc, treat the welding blade and treat that the welding wheel disc carries out T type penetration welding.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A penetration welding positioning device for a fan impeller is characterized by comprising a bottom plate (1), a positioning ring (2), a chuck assembly (3), an elastic positioning assembly (4) and a gland assembly (5);
the positioning ring (2) is arranged on the bottom plate (1), and the positioning ring (2) is used for positioning the wheel disc (7) to be welded; the chuck assembly (3) is arranged in the positioning ring (2) and is coaxial with the positioning ring (2);
a clamping groove (3.a) is arranged on the chuck component (3); the blade (6) to be welded is arranged in the clamping groove (3. a); the elastic positioning component (4) is arranged on the bottom plate (1) and is used for pressing the blade (6) to be welded in the clamping groove (3. a);
the gland assembly (5) is arranged on the chuck assembly (3) and is used for pressing the wheel disc (7) to be welded on the blade (6) to be welded.
2. The penetration welding positioning device for the fan impeller according to the claim 1, characterized in that the inner wall of the positioning ring (2) is provided with a positioning part (2.1), and the positioning of the blade to be welded is realized through the positioning part (2.1), the chuck assembly (3) and the elastic positioning assembly (4).
3. The penetration welding positioning device for the fan impeller according to claim 2, characterized in that the positioning part (2.1), the chuck assembly (3) and the elastic positioning assembly (4) are arranged in one-to-one correspondence with the blades to be welded.
4. The penetration welding positioning device for the fan impeller according to the claim 2 or 3, characterized in that the contact surface of the clamping groove (3.a) and the blade to be welded is a first positioning surface (3.a1), the contact surface of the positioning part (2.1) and the blade is a second positioning surface (2.1a), and the first positioning surface (3.a1) and the second positioning surface (2.1a) are in the same vertical plane.
5. The blower wheel penetration weld positioning device of claim 1, wherein the chuck assembly (3) comprises a first connecting post (3.1), an upper chuck (3.2), and a lower chuck (3.3); the first connecting column (3.1) is arranged on the bottom plate (1); go up chuck (3.2) and lower chuck (3.3) and all coaxial setting on first connecting column (3.1), and go up chuck (3.2) and lower chuck (3.3) and all be equipped with draw-in groove (3. a).
6. The blower impeller penetration welding positioning device according to claim 5, wherein the bottom plate (1) is provided with a mounting groove, the first connecting column (3.1) is in threaded connection in the mounting groove, and the first connecting column (3.1) and the positioning ring (2) are coaxially arranged.
7. The fan wheel penetration weld positioning device of claim 1, wherein the resilient positioning assembly (4) comprises a mounting block (4.1) and a resilient positioning bead (4.2); the mounting block (4.1) is arranged on the bottom plate (1); the elastic positioning beads (4.2) are arranged on the mounting blocks (4.1) and used for pressing the blades to be welded.
8. The blower impeller penetration weld positioning device according to claim 1, wherein the gland assembly (5) comprises a second connecting column (5.1), a gland (5.2) and a threaded locking piece (5.3); the second connecting column (5.1) is arranged on the chuck component (3); gland (5.2) slide to set up on second spliced pole (5.1), screw retaining member (5.3) and second spliced pole (5.1) screw-thread fit, screw retaining member (5.3) are used for driving gland (5.2) and wait to weld the rim plate contact.
9. The blower wheel penetration welding positioning device according to claim 8, characterized in that the second connecting column (5.1) and the chuck assembly (3) are in threaded connection, and the second connecting column (5.1) and the chuck assembly (3) are coaxially arranged.
10. The penetration welding positioning device for the fan impeller according to claim 8, characterized in that the lower end of the gland (5.2) is provided with a limiting bulge (5.21); the wheel disc to be welded is provided with a matching hole matched with the limiting bulge (5.21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111483591.9A CN114147407B (en) | 2021-12-07 | 2021-12-07 | Fan impeller penetration welding positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111483591.9A CN114147407B (en) | 2021-12-07 | 2021-12-07 | Fan impeller penetration welding positioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114147407A true CN114147407A (en) | 2022-03-08 |
| CN114147407B CN114147407B (en) | 2024-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111483591.9A Active CN114147407B (en) | 2021-12-07 | 2021-12-07 | Fan impeller penetration welding positioning device |
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| Country | Link |
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| CN (1) | CN114147407B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114633011A (en) * | 2022-05-05 | 2022-06-17 | 中国航发航空科技股份有限公司 | Clamp device and alignment method for electron beam welding blind welding |
| CN115213521A (en) * | 2022-09-19 | 2022-10-21 | 南通惠尔风机有限公司 | Machining device for fan impeller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9123834D0 (en) * | 1991-01-09 | 1992-01-02 | Rosspark Ltd | A method for seam welding |
| CN109317886A (en) * | 2018-08-17 | 2019-02-12 | 常州信息职业技术学院 | A kind of fixture for impeller positioning welding |
| CN109396737A (en) * | 2018-12-27 | 2019-03-01 | 株洲联诚集团控股股份有限公司 | A kind of draught fan impeller general welding fixture |
| CN210789795U (en) * | 2019-08-21 | 2020-06-19 | 无锡精恩风机有限公司 | Blade welding tool for machining centrifugal fan impeller |
| CN112139729A (en) * | 2020-08-31 | 2020-12-29 | 上海施依洛风机有限公司 | Wind wheel welding tool clamp |
| CN216730296U (en) * | 2021-12-07 | 2022-06-14 | 湖南联诚轨道装备有限公司 | Fan impeller penetration welding positioning device |
-
2021
- 2021-12-07 CN CN202111483591.9A patent/CN114147407B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9123834D0 (en) * | 1991-01-09 | 1992-01-02 | Rosspark Ltd | A method for seam welding |
| CN109317886A (en) * | 2018-08-17 | 2019-02-12 | 常州信息职业技术学院 | A kind of fixture for impeller positioning welding |
| CN109396737A (en) * | 2018-12-27 | 2019-03-01 | 株洲联诚集团控股股份有限公司 | A kind of draught fan impeller general welding fixture |
| CN210789795U (en) * | 2019-08-21 | 2020-06-19 | 无锡精恩风机有限公司 | Blade welding tool for machining centrifugal fan impeller |
| CN112139729A (en) * | 2020-08-31 | 2020-12-29 | 上海施依洛风机有限公司 | Wind wheel welding tool clamp |
| CN216730296U (en) * | 2021-12-07 | 2022-06-14 | 湖南联诚轨道装备有限公司 | Fan impeller penetration welding positioning device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114633011A (en) * | 2022-05-05 | 2022-06-17 | 中国航发航空科技股份有限公司 | Clamp device and alignment method for electron beam welding blind welding |
| CN114633011B (en) * | 2022-05-05 | 2023-11-14 | 中国航发航空科技股份有限公司 | Clamp device for electron beam welding blind welding and alignment method |
| CN115213521A (en) * | 2022-09-19 | 2022-10-21 | 南通惠尔风机有限公司 | Machining device for fan impeller |
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| Publication number | Publication date |
|---|---|
| CN114147407B (en) | 2024-07-23 |
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