CN111015065A - A carbon steel impeller assembly and welding device and method - Google Patents
A carbon steel impeller assembly and welding device and method Download PDFInfo
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- CN111015065A CN111015065A CN202010003983.XA CN202010003983A CN111015065A CN 111015065 A CN111015065 A CN 111015065A CN 202010003983 A CN202010003983 A CN 202010003983A CN 111015065 A CN111015065 A CN 111015065A
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- 238000003466 welding Methods 0.000 title claims abstract description 42
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 24
- 239000010962 carbon steel Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 8
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 9
- 239000010432 diamond Substances 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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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 for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a carbon steel impeller assembling and welding device and a method, which comprises a main body forward assembly, a central shaft, a central support ring, a pressure plate, a conical disc centering assembly, an impeller directional assembly forward assembly, a main body reverse assembly and an impeller directional assembly reverse assembly; the main body is positively arranged and comprises a bottom plate, a tray, a supporting plate, a lower upright post and a cushion block; the bottom plate is connected with the supporting plate through a plurality of lower upright posts distributed in an array manner, a tray is arranged between the bottom plate and the supporting plate, and a cushion block is arranged on the lower end face of the tray; the central shaft comprises a central support, a positioning plate, a diamond pin, a screw and a connecting shaft; the center support upper end is equipped with the locating plate, and this application is easy and simple to handle, and the location is accurate quick, guarantees positioning accuracy through machine tool machining, once breaks away from 12 blade location through corotation blade benchmark side location group and reversal blade compaction group, takes off the material fast, has improved production efficiency.
Description
Technical Field
The invention belongs to the technical field of automatic welding, relates to an assembling and welding device, and particularly relates to a carbon steel impeller assembling and welding device and method.
Background
The traditional carbon steel impeller is formed by splicing and welding, one group of blades are respectively welded with an upper conical disc and a central disc, and the other group of blades are respectively welded with a lower conical disc and the central disc. At present, the welding mode of current impeller adopts manual welding usually, draws the auxiliary line on the central disk of impeller, welds blade a slice on the central disk again, welds upper and lower conical disks on the blade top again at last, and this step of welding blade is very important, and the quality of whole impeller can direct influence to blade welded precision, and manual welding blade efficiency is extremely very low, and the welding precision is not high moreover, and the product percent of pass is low, extravagant manpower and materials and cost. Therefore, a carbon steel impeller assembling and welding device and a carbon steel impeller assembling and welding method which are convenient to operate and accurate in positioning are needed to be designed.
According to the special structure of the carbon steel impeller, the device is convenient to use by improving a quick clamp, a ring and the like, and the blades are complete and are not damaged.
Disclosure of Invention
The invention aims to provide a carbon steel impeller assembling and welding device and a method, which are used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a carbon steel impeller assembling and welding device comprises a main body forward assembly, a central shaft, a central support ring, a pressure plate, a conical disc centering assembly, an impeller directional assembly forward assembly, a main body reverse assembly and an impeller directional assembly reverse assembly; the main body is positively arranged and comprises a bottom plate, a tray, a supporting plate, a lower upright post and a cushion block; the bottom plate is connected with the supporting plate through a plurality of lower upright posts distributed in an array manner, a tray is arranged between the bottom plate and the supporting plate, and a cushion block is arranged on the lower end face of the tray; the central shaft comprises a central support, a positioning plate, a diamond pin, a screw and a connecting shaft; the upper end of the central support is provided with a positioning plate, a diamond pin is arranged on the upper end surface of the positioning plate, and the upper end of the central support is connected with a screw rod through a connecting shaft; the central support ring comprises a limiting block, a base, a first quick clamp, a circular ring and a lifting ring screw; the ring is arranged in the middle of the base, the lifting bolt penetrates through the surface of the base close to the ring, at least four first quick clamps are arranged and distributed on the outer side of the base in an array mode, and each first quick clamp is provided with a limiting block; the cone disc centering assembly comprises a shaft sleeve and a main body; the shaft sleeve penetrates through a through hole in the center of the main body, and the shaft sleeve and the main body are fixedly connected through a bolt; the impeller directional assembly comprises a blade reference side positioning group and a blade pressing group matched with the blade reference side positioning group; the impeller directional reverse assembly comprises a blade reference side positioning group and a blade pressing group matched with the blade reference side positioning group
As a further scheme of the invention: blade benchmark side location group includes regulating block, fixed block, axle sleeve, main part, board one, No. two quick clamps, direction nail and standard component seam, the main part hole position is worn to establish by the axle sleeve, and the axle sleeve outside is equipped with direction nail and standard component seam, regulating block and fixed block set up the main part surface in the axle sleeve outside, No. two quick clamps also set up the main part surface in the axle sleeve outside, board one is equipped with a plurality of, and the array distributes in the main part outside.
As a still further scheme of the invention: the blade pressing group comprises a plate four, a plate five and a plate seven.
As a still further scheme of the invention: at least two arc-shaped holes which are symmetrically arranged are also formed in the base.
As a still further scheme of the invention: the diamond-shaped pin corresponds to a positioning hole on the surface of the centering disk of the carbon steel impeller to be processed.
Compared with the prior art, the invention has the beneficial effects that:
1) the positioning device is simple and convenient to operate, accurate and rapid in positioning, the positioning precision is guaranteed through machine tool machining, the positioning of 12 groups of blades is separated once through the forward rotation blade reference side positioning group and the reverse rotation blade pressing group, the stripping is rapid, and the production efficiency is improved;
2) QT450 (nodular cast iron) is used for frequently disassembling and assembling the material of the matched part, so that the friction coefficient is reduced, the disassembly and the assembly are flexible, and the time and the labor are saved; because the QT450 has excellent cutting processability, the processing difficulty and the cost are reduced;
3) the operation is stable: the impeller directional assembly is in clearance fit with the central shaft through hole and the shaft respectively, and the mechanical fit reliability is high, so that the assembly and disassembly are stable and reliable, and the qualification rate of products is improved.
Drawings
FIG. 1 is a schematic structural front view of a carbon steel impeller of the present invention;
FIG. 2 is a schematic axial view of the frontal structure of a carbon steel impeller of the present invention;
FIG. 3 is a cross-sectional view of a splice welding front assembly of the present invention;
FIG. 4 is a schematic axial side view of the splice welding forward mounting of the present invention;
FIG. 5 is a cross-sectional view of a splice welding reverse of the present invention;
FIG. 6 is a schematic axial side view of the assembly weld reverse of the present invention;
FIG. 7 is a front view of the main body front assembly of the present invention;
FIG. 8 is a schematic side view of the front side structure of the main body front mount of the present invention;
FIG. 9 is a front view of the central shaft;
FIG. 10 is a schematic axial view of a central support ring;
FIG. 11 is a front view of the cone centering assembly;
FIG. 12 is a front sectional view of the cone centering assembly;
FIG. 13 is a front view of the impeller directional assembly;
FIG. 14 is a schematic axial view of a blade reference side locating group;
FIG. 15 is a schematic front view of a blade hold-down group;
fig. 16 is a schematic view of the front structure of the impeller orientation assembly.
In the figure: 1. the main body of the centrifugal impeller comprises a central disc, 2 blades, 3 lower central rings, 4 upper central rings, 5 lower conical discs, 6 upper conical discs, 7 main body forward mounting, 8 central shafts, 9 central support rings, 10 pressure discs, 11 conical disc centering assemblies, 12 impeller directional assembly forward mounting, 13 main body reverse mounting, 14 impeller directional assembly reverse mounting, 15 bottom plates, 16 trays, 17 supporting plates, 18 lower stand columns, 19 cushion blocks, 20 central supports, 21 positioning plates, 22 diamond pins, 23 screws, 24 connecting shafts, 25 limiting blocks, 26 bases, 27 quick clamps, 28 circular rings, 29 lifting ring screws, 30 shaft sleeves, 31 main bodies, 32 blade reference side positioning groups, 33 blade pressing groups, 34 adjusting blocks, 35 fixing blocks, 36 shaft sleeves, 37 main bodies, 38 quick clamps, 39 plates, 40 guide pins, 41 standard parts and welding parts, 42. And the fourth plate, the 43, the fifth plate, the 44, the seventh plate and the 45 are reversely assembled by the blade reference side positioning group and the 46 is reversely assembled by the blade pressing group.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-16, in an embodiment of the present invention, a carbon steel impeller assembling and welding apparatus includes a main body forward mounting 7, a central shaft 8, a central support ring 9, a pressure plate 10, a conical disc centering assembly 11, an impeller directional forward mounting 12, a main body reverse mounting 13, and an impeller directional reverse mounting 14; the main body front installation 7 comprises a bottom plate 15, a tray 16, a supporting plate 17, a lower upright post 18 and a cushion block 19; the bottom plate 15 and the supporting plate 17 are connected through a plurality of lower upright posts 18 distributed in an array manner, a tray 16 is arranged between the bottom plate 15 and the supporting plate 17, and a cushion block 19 is arranged on the lower end face of the tray 17; the central shaft 8 comprises a central support 20, a positioning plate 21, a diamond pin 22, a screw 23 and a connecting shaft 24; the upper end of the central support 20 is provided with a positioning plate 21, a diamond pin 22 is arranged on the upper end surface of the positioning plate 21, and the upper end of the central support 20 is connected with a screw 23 through a connecting shaft 24; the central support ring 9 comprises a limiting block 25, a base 26, a first quick clamp 27, a circular ring 28 and a lifting bolt 29; the circular ring 28 is arranged in the middle of the base 26, the lifting bolts 29 penetrate through the surface of the base 26 close to the circular ring 28, at least four first quick clamps 27 are arranged and distributed on the outer side of the base 26 in an array mode, and each first quick clamp 27 is provided with a limiting block 25; the cone centering assembly 11 comprises a shaft sleeve 30 and a main body 31; the shaft sleeve 30 passes through a through hole in the center of the main body 31, and the shaft sleeve and the main body are fixedly connected through a bolt; the impeller orientation assembly 12 comprises a blade reference side positioning group 32 and a blade pressing group 33 matched with the blade reference side positioning group; the impeller orientation assembly reverse installation 14 comprises a blade reference side orientation assembly reverse installation 45 and a blade pressing assembly reverse installation 46 matched with the blade reference side orientation assembly reverse installation;
blade benchmark side location group 32 includes regulating block 34, fixed block 35, axle sleeve 36, main part 37, board 38, No. two quick clamps 39, guide pin 40 and standard component seam 41, axle sleeve 36 wears to establish in main part 37 hole position, and the axle sleeve 36 outside is equipped with guide pin 40 and standard component seam 41, regulating block 34 and fixed block 35 set up the main part 37 surface in the axle sleeve 36 outside, No. two quick clamps 39 also set up the main part 37 surface in the axle sleeve 36 outside, board 38 is equipped with a plurality of, and the array distributes in the main part 37 outside.
The blade pressing group 33 comprises a plate four 42, a plate five 43 and a plate seven 44;
the carbon steel impeller needing to be welded comprises an upper conical disc 6, blades 2, a central disc 1, an upper central ring 4, a lower central ring 3 and a lower conical disc 5.
The working principle of the invention is as follows: the carbon steel impeller assembling and welding device can work according to the following processes:
in the first step, the center plate 1 is manually placed to be centered on the center shaft 8, and the diamond pins 22 are used for centering the circumferential position of the center plate 1.
In a second step, the central support ring 9 is placed on the central shaft 8, and the circumferential direction of the central support ring 9 is positioned by the grooves on the ring 28 on the central support ring 9 being snapped into the pins on the central shaft 8.
Thirdly, the upper center ring 4 is placed into the limiting block 25 on the center support ring 9, the first 4 quick clamps 27 on the center support ring 9 are sequentially opened, and the upper center ring 4 is positioned through the first quick clamps 27.
Fourthly, hoisting the impeller directional assembly 7 onto a central shaft 8, and positioning the circumferential direction of the impeller directional assembly 7 by matching a conical head at the top of a standard part welding joint 41 with a conical positioning hole on the central shaft 8 through screwing down the standard part welding joint 41 on the impeller directional assembly 7; at the moment, the first quick clamp 27 on the impeller orientation assembly 7 is in an open state, and a plate I38 on the blade reference side positioning assembly 32 and a plate II 44 on the blade pressing assembly 33 form an included angle of 5 degrees;
and fifthly, sequentially loading twelve blades 2 to position the bottoms of the blades 2 through the notches on the central disc 1, and attaching the upper parts of the blades 2 to the first plates 38 on the blade reference side positioning group 32.
Sixth, the quick clamp No. one 27 on the impeller orientation group normal mounting 7 is closed into the dead center so that the first plate 38 on the vane reference side positioning group 32 and the seventh plate 44 on the vane pressing group 33 clamp the vane.
And seventhly, loading the upper conical disc 6 and the conical disc centering assembly 11, and matching an outer ring of the conical disc centering assembly 11 with an inner ring of the upper conical disc 6 to determine the center of the upper conical disc.
And eighthly, loading the pressing plate 10, screwing the nut on the central shaft 8 to tightly press the pressing plate 10, so that the inner ring of the pressing plate 10 is attached to the upper conical plate 6, and the upper conical plate 6 is axially fixed.
And ninthly, manually spot-welding the blades 2 with the upper conical disc 6 and the central disc 1.
Step ten, after the manual spot welding is finished, loosening the nut on the central shaft 8, and taking out the pressure plate; then the central support ring 9 is hoisted out; the first quick clamp 27 on the impeller orientation group forward assembly 7 is opened, so that the plate 7 on the blade pressing group 33 is separated from the twelve blades 2; unscrewing the standard part welding joint 41, rotating the impeller directional assembly 12 to separate the plate seven 44 on the impeller directional assembly 12 from the blade 2, and taking out the impeller directional assembly 12; the four snap clips on the central support ring 9 are then opened and the central support ring 9 is removed.
And eleventh, finishing stripping of the workpiece, taking out the workpiece, wherein the upper half part and the lower half part of the workpiece are symmetrical, and finishing spot welding of the lower half part of the workpiece in the same way as the above steps.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A carbon steel impeller assembling and welding device is characterized by comprising a main body forward assembly (7), a central shaft (8), a central support ring (9), a pressure plate (10), a conical plate centering assembly (11), an impeller directional assembly forward assembly (12), a main body reverse assembly (13) and an impeller directional assembly reverse assembly (14);
the main body front mounting device (7) comprises a bottom plate (15), a tray (16), a supporting plate (17), a lower upright post (18) and a cushion block (19);
the bottom plate (15) is connected with the supporting plate (17) through a plurality of lower upright posts (18) distributed in an array manner, a tray (16) is arranged between the bottom plate (15) and the supporting plate (17), and a cushion block (19) is arranged on the lower end face of the tray (17);
the central shaft (8) comprises a central support (20), a positioning plate (21), a diamond pin (22), a screw rod (23) and a connecting shaft (24);
a positioning plate (21) is arranged at the upper end of the central support (20), a diamond-shaped pin (22) is arranged on the upper end surface of the positioning plate (21), and the upper end of the central support (20) is connected with a screw rod (23) through a connecting shaft (24);
the central support ring (9) comprises a limiting block (25), a base (26), a first quick clamp (27), a circular ring (28) and a lifting bolt (29);
the ring (28) is arranged in the middle of the base (26), the lifting bolts (29) penetrate through the surface of the base (26) close to the ring (28), at least four first quick clamps (27) are arranged and distributed on the outer side of the base (26) in an array mode, and each first quick clamp (27) is provided with a limiting block (25);
the cone disc centering assembly (11) comprises a shaft sleeve (30) and a main body (31);
the shaft sleeve (30) penetrates through a through hole in the center of the main body (31), and the shaft sleeve and the main body are fixedly connected through a bolt;
the impeller orientation assembly (12) comprises a blade reference side positioning group (32) and a blade pressing group (33) matched with the blade reference side positioning group;
the impeller orientation assembly reverse assembly (14) comprises a blade reference side orientation assembly reverse assembly (45) and a blade pressing assembly reverse assembly (46) matched with the blade reference side orientation assembly reverse assembly.
2. The carbon steel impeller assembling and welding device according to claim 1, wherein the blade reference side positioning group (32) comprises an adjusting block (34), a fixing block (35), a shaft sleeve (36), a main body (37), a first plate (38), a second quick clamp (39), a guide nail (40) and a standard part welding part (41);
axle sleeve (36) wear to establish in main part (37) hole position, and axle sleeve (36) outside is equipped with guide nail (40) and standard component seam (41), main part (37) surface in axle sleeve (36) outside is set up in regulating block (34) and fixed block (35), No. two quick clamps (39) also set up main part (37) surface in axle sleeve (36) outside, board (38) are equipped with a plurality of, and the array distributes in main part (37) outside.
3. The carbon steel impeller assembly welding device according to claim 1, wherein the blade pressing group (33) comprises a plate four (42), a plate five (43) and a plate seven (44).
4. The carbon steel impeller assembling and welding device according to claim 1, wherein the base (26) is further provided with at least two arc-shaped holes which are symmetrically arranged.
5. The carbon steel impeller assembling and welding device according to claim 1, wherein the diamond-shaped pins (22) correspond to positioning holes on the surface of the carbon steel impeller centering disc (1) to be machined.
6. The carbon steel impeller assembling and welding device according to claim 1, wherein grooves corresponding to the pins on the central shaft (8) are formed in the circular ring (28).
7. The use method of the carbon steel impeller assembling and welding device of any one of claims 1 to 6 is characterized by comprising the following steps:
firstly, manually putting the central disc (1) into the machine, centering the central disc by using a central shaft (8), and positioning the circumferential position of the central disc (1) by using a diamond pin (22); secondly, the central support ring (9) is placed into the central shaft (8), and the groove on the circular ring (28) on the central support ring (9) is clamped into the pin on the central shaft (8) to position the circumferential direction of the central support ring (9); thirdly, the upper center ring (4) is placed into a limiting block (25) on the center support ring (9), four first quick clamps (27) on the center support ring (9) are sequentially opened, and the upper center ring (4) is positioned through the first quick clamps (27); fourthly, hoisting the impeller directional assembly (12) onto the central shaft (8), and positioning the circumferential direction of the impeller directional assembly (12) by screwing a standard part welding joint (41) on the impeller directional assembly (12) to enable a top conical head of the standard part welding joint (41) to be matched with a conical positioning hole on the central shaft (8), wherein a first quick clamp (27) on the impeller directional assembly (12) is in an open state, and a first plate (38) on the blade reference side positioning group (32) and a seventh plate (44) on the blade pressing group (33) form an included angle of five degrees; fifthly, sequentially loading twelve blades (2) to position the bottoms of the blades (2) through the notches on the central disc (1), and attaching the upper parts of the blades (2) to a first plate (38) on a blade reference side positioning group (45); sixthly, a first quick clamp (27) on the impeller orientation assembly (12) is closed to enter a dead point, so that a first plate (38) on the blade reference side positioning group (32) and a seventh plate (44) on the blade pressing group (33) clamp the blades; seventhly, an upper conical disc (6) and a conical disc centering assembly (11) are installed, and the outer ring of the conical disc centering assembly (11) is matched with the inner ring of the upper conical disc (6) to fix the center of the upper conical disc; eighthly, a pressure plate (10) is arranged, a nut on the central shaft (8) is screwed down to press the pressure plate (10), so that the inner ring of the pressure plate (10) is attached to the upper conical plate (6), and the upper conical plate (6) is axially fixed; ninthly, manually spot-welding the blades (2), the upper conical disc (6) and the central disc (1); step ten, after the manual spot welding is finished, loosening the nut on the central shaft (8), and taking out the pressure plate; then, hanging out the central support ring (9); a first quick clamp (27) on the impeller orientation assembly (12) is opened, so that a plate seven (44) on a blade pressing group (46) is separated from twelve blades (2); unscrewing the standard part welding joint (41), rotating the impeller directional assembly (12), separating a plate seven (44) on the impeller directional assembly (12) from the blade (2), and taking out the impeller directional assembly (12); then opening four quick clamps on the central support ring (9) and taking out the central support ring (9); and eleventh, finishing stripping of the workpiece, taking out the workpiece, wherein the upper half part and the lower half part of the workpiece are symmetrical, and finishing spot welding of the lower half part of the workpiece in the same way as the above steps.
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| CN202010003983.XA CN111015065B (en) | 2020-01-03 | 2020-01-03 | Carbon steel impeller assembly welding device and method |
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|---|---|---|---|---|
| CN113458694A (en) * | 2021-07-30 | 2021-10-01 | 广东肇庆德通有限公司 | Welding positioning clamp for double-air-inlet impeller and positioning method thereof |
| CN116372488A (en) * | 2023-05-30 | 2023-07-04 | 北京航空航天大学宁波创新研究院 | Welding assembly positioning fixture for closed impeller and application method of welding assembly positioning fixture |
| CN116372488B (en) * | 2023-05-30 | 2023-08-18 | 北京航空航天大学宁波创新研究院 | Welding assembly positioning fixture for closed impeller and application method of welding assembly positioning fixture |
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| CN111015065B (en) | 2024-12-27 |
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