Positioning tool for glass fiber reinforced plastic centrifugal fan impeller

Abstract

The invention relates to the technical field of centrifugal fan manufacturing, in particular to a glass fiber reinforced plastic centrifugal fan impeller positioning tool which comprises a mold body and an impeller combination, the impeller combination comprises an impeller upper disc and an impeller bottom disc, and a plurality of impeller blades are arranged between the impeller upper disc and the impeller bottom disc. An angle positioning piece is arranged in the impeller assembly, a plurality of positioning grooves matched with impeller blades are evenly formed in the angle positioning piece, and an umbrella opening structure capable of being matched with the impeller blades of different sizes is further arranged on the angle positioning piece. The upper end of the impeller base plate is further provided with a centering structure capable of centering and positioning the angle positioning piece in the center of the impeller upper plate, and the problems that in the prior art, displacement is prone to occurring in the welding process, and the welding perpendicularity of impeller blades cannot be guaranteed are effectively solved. The working efficiency of manual scribing is low; and most impeller fixing and positioning devices can only fix impeller blades of the same specification and cannot adapt to impeller blades of different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fan manufacturing, and in particular to a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller. Background Art

[0002] Centrifugal fans are based on the principle of converting kinetic energy into potential energy. They use high-speed rotating impellers to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and conveying grains; wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] In the production of centrifugal fan impellers, the blades need to be welded to the positioning rear disc. In traditional technology, the positioning welding is mostly done by manually marking the positioning rear disc, but there are some shortcomings:

[0004] 1. It is easy to shift during the welding process, the verticality of the blade welding cannot be guaranteed, and the efficiency of manual marking is low;

[0005] 2. The impeller blades of the fan are of different sizes, and most impeller blade positioning devices can only fix impeller blades of the same specification and cannot adapt to impeller blades of different sizes. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a fiberglass centrifugal fan impeller positioning tooling which effectively solves the problems in the prior art of easy displacement during welding, inability to ensure the verticality of blade welding, low efficiency of manual marking, and the fact that most impeller blade positioning devices can only fix impeller blades of the same specification and cannot adapt to impeller blades of different sizes.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A positioning tool for a glass fiber reinforced plastic centrifugal fan impeller, comprising a mold body and an impeller assembly, the mold body comprising a first mold body and a second mold body that can be molded, the impeller assembly comprising an impeller upper plate and an impeller chassis, a plurality of impeller blades are arranged between the impeller upper plate and the impeller chassis, an angle positioning piece is arranged in the impeller assembly, a plurality of positioning grooves that are compatible with the impeller blades are evenly opened on the angle positioning piece, an umbrella structure that can be adapted to impeller blades of different sizes is also arranged on the angle positioning piece, the umbrella structure comprises a plurality of struts that can be extended synchronously, the ends of the struts are rotatably connected to inner groove sliders that are slidably connected to the angle positioning piece, the inner groove sliders are respectively provided with positioning pins that are slidably connected to the positioning grooves, a centering structure that can center the angle positioning piece at the center position of the impeller upper plate is also arranged at the upper end of the impeller chassis, and the centering structure comprises a pair of mark plates that can be slidably arranged towards each other.

[0009] Preferably, the first mold body and the second mold body are respectively provided with semicircular mold holes, a plurality of positioning blocks are evenly arranged in the semicircular mold holes, and the opposite surfaces at both ends of the first mold body and the second mold body are respectively provided with grooves, and a pair of mold holes are arranged in the grooves.

[0010] Preferably, the umbrella expansion structure also includes a screw rotatably connected to the center position of the angle positioning piece, a sleeve is provided at the upper end of the angle positioning piece, a screw barrel threadably connected to the screw is fixedly connected to the inner wall of the sleeve, a plurality of dividing grooves are evenly opened on the outer circumference of the sleeve, the support rod is rotatably connected in the dividing groove, the other end of the support rod is rotatably connected to the inner groove slider, the upper end of the screw is fixedly connected to a support rod, and the centering structure is provided on the support rod.

[0011] Preferably, the centering structure also includes an annular column, the lower end of which is provided with a rotating cylinder rotatably connected to the support rod, a storage tank is opened in the annular column, the two ends of the storage tank are respectively slidably connected with the first rack and the second rack, a rotating column rotatably connected to the annular column is provided at the center of the storage tank, a spur gear is fixedly connected to the rotating column, the two ends of the spur gear are respectively meshed with the first rack and the second rack, the spur gear is coaxially provided with a worm wheel fixedly connected to the rotating column, a worm meshed with the worm wheel is rotatably connected to the annular column, and the ends of the first rack and the second rack are respectively fixedly connected to the said reference plate.

[0012] Preferably, both ends of the storage tank are respectively provided with splicing blocks fixedly connected to the annular column, and the first rack and the second rack are respectively provided with sliding pins slidably connected to the inner wall of the splicing block.

[0013] Preferably, the positioning grooves are evenly arranged on the angle positioning pieces, and the inner wall of the inner groove slider is slidably connected with the positioning pins.

[0014] Preferably, a blocking disk is fixedly connected to the upper end of the positioning pin, and the diameter of the blocking disk is larger than the inner groove width of the inner groove slider.

[0015] Preferably, the upper and lower ends of the impeller blades are respectively welded to the opposite surfaces of the impeller upper plate and the impeller bottom plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention sets an umbrella structure, and the support rods respectively drive the inner groove slider to slide synchronously along the upper end surface of the angle positioning piece, and the inner groove slider drives the positioning pin to slide along the positioning groove. When the impeller blade is placed in the positioning groove, the position of the positioning pin in the positioning groove is changed, and then the depth of the impeller blade in the positioning groove is changed according to the size of the impeller blade. Since the positioning pin is synchronously located in the positioning groove 10 and is located in the same circumference of the angle positioning piece, it is ensured that the depth of the impeller blade in the positioning groove of the angle positioning piece is the same.

[0018] 2. Evenly insert the impeller blades into the positioning grooves of the angle positioning pieces, and then place the impeller upper plate on the upper end of the impeller blades. Limited by the first mold body and the second mold body, the impeller upper plate and the impeller bottom plate are at the same axial position, which effectively avoids the impeller blades from shifting during the welding process and ensures the verticality of the blade welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the mold closing structure of a mold body of a positioning tooling for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0020] Figure 2 It is a schematic diagram of the split mold structure of a mold body of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0021] Figure 3 It is a first structural schematic diagram of an impeller assembly of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0022] Figure 4 It is a structural schematic diagram of an impeller upper plate of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0023] Figure 5 It is a second structural schematic diagram of an impeller assembly of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0024] Figure 6 It is a structural schematic diagram of an umbrella structure of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0025] Figure 7It is a structural schematic diagram of a sleeve of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0026] Figure 8 It is a structural schematic diagram of a centering structure of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of a ring-shaped column of a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention;

[0028] Fig.10 A positioning tool for a glass fiber reinforced plastic centrifugal fan impeller of the present invention Figure 6 A local enlarged view of area B;

[0029] In the figure: 1, the first mold body, 2, the positioning block, 3, the mold hole, 4, the impeller upper plate, 5, the angle positioning plate, 6, the impeller blade, 7, the impeller bottom plate, 8, the second mold body, 9, the groove, 10, the positioning groove, 11, the support rod, 12, the inner groove slider, 13, the support rod, 14, the mark plate, 15, the first rack, 16, the second rack, 17, the sliding pin, 18, the worm gear, 19, the annular column, 20, the worm, 21, the first handle, 22, the sleeve, 23, the screw, 24, the screw barrel, 25, the blocking plate, 26, the positioning pin, 27, the rotating barrel, 28, the splicing block, 29, the spur gear, 30, the rotating column, 31, the storage tank, 32, the semicircular mold hole, 33, the second handle, 34, the indexing groove. DETAILED DESCRIPTION

[0030] like Figure 1-10 As shown, a positioning tool for a glass fiber reinforced plastic centrifugal fan impeller includes a mold body and an impeller assembly, wherein the mold body includes a first mold body 1 and a second mold body 8 that can be molded, and the impeller assembly includes an impeller upper plate 4 and an impeller bottom plate 7, and a plurality of impeller blades 6 are arranged between the impeller upper plate 4 and the impeller bottom plate 7, and an angle positioning piece 5 is arranged in the impeller assembly, and a plurality of positioning grooves 10 that are adapted to the impeller blades 6 are evenly opened on the angle positioning piece 5, and an angle positioning piece 5 that can be adapted to the impeller blades 6 is also provided on the angle positioning piece 5. An umbrella structure is provided for impeller blades 6 of different sizes, the umbrella structure comprising a plurality of struts 13 which can be extended synchronously, the ends of the struts 13 being rotatably connected to inner groove sliders 12 which are slidably connected to the angle positioning pieces 5, the inner groove sliders 12 are respectively provided with positioning pins 26 which are slidably connected to the positioning grooves 10, the upper end of the impeller chassis 7 is also provided with a centering structure which can center the angle positioning piece 5 at the center position of the impeller upper plate 4, the centering structure comprising a pair of mark plates 14 which can be slidably arranged towards each other.

[0031] When the present invention is in use, the first mold body 1 and the second mold body 8 are opened, the impeller chassis 7 is placed between the first mold body 1 and the second mold body 8, and then the first mold body 1 and the second mold body 8 are molded and fixed to clamp and fix the impeller chassis 7, the angle positioning piece 5 is placed on the impeller chassis 7, and then the impeller blades 6 are evenly inserted into the positioning grooves 10 of the angle positioning piece 5, and then the impeller upper plate 4 is placed on the upper end of the impeller blades 6. Limited by the first mold body 1 and the second mold body 8, the impeller upper plate 4 and the impeller chassis 7 are at the same axial position. According to the size of the impeller blades 6, it is ensured that the impeller blades 6 can be adapted to the impeller upper plate 4 and the impeller chassis 7, and the umbrella structure is controlled to work, the support rod 13 is synchronously swung, the support rod 13 drives the inner groove slider 12 to slide synchronously along the upper surface of the angle positioning piece 5, and the inner groove slider 12 drives the positioning latch 26 to slide along the positioning groove 10, and then the impeller blade 6 is placed in the positioning groove 10. , by changing the position of the positioning slide pin 17 in the positioning groove 10, the depth of the impeller blade 6 inserted into the positioning groove 10 is changed according to the size of the impeller blade 6, and since the positioning slide pin 17 is synchronously in the positioning groove 10 and is in the same circumference of the angle positioning piece 5, it is ensured that the depth of the impeller blade 6 inserted into the positioning groove 10 of the angle positioning piece 5 is the same. At the same time, the centering structure is controlled to work, and the marking plate 14 slides toward both ends synchronously, and the marking plate 14 is abutted against the two ends of the impeller upper disk 4, thereby ensuring that the angle positioning piece 5 is in the same axial position as the impeller chassis 7 and the impeller upper disk 4, and since the impeller blade 6 is inserted into the positioning groove 10 of the angle positioning piece 5 at the same depth, it is ensured that the impeller blade 6 is in the same circumferential position between the impeller chassis 7 and the impeller upper disk 4, and then the upper and lower ends of the impeller blade 6 are respectively fixedly arranged on the opposite surfaces of the impeller upper disk 4 and the impeller chassis 7, so as to realize the positioning assembly of the impeller assembly.

[0032] The first mold body 1 and the second mold body 8 are respectively provided with a semicircular mold hole 32, and a plurality of positioning blocks 2 are evenly arranged in the semicircular mold hole 32. The first mold body 1 and the second mold body 8 are respectively provided with grooves 9 on opposite ends of the first mold body 1 and the second mold body 8, and a pair of mold holes 3 are arranged in the grooves 9.

[0033] like Figure 1 and 2 As shown, after the first mold body 1 and the second mold body 8 are molded together, the semicircular mold holes 32 on the two are spliced ​​into a center receiving hole for clamping and fixing the impeller chassis 7. The first mold body 1 and the second mold body 8 are molded together and fixed by inserting bolts and nuts into the mold hole 3.

[0034] The umbrella structure also includes a screw 23 rotatably connected to the center position of the angle positioning piece 5, a sleeve 22 is provided at the upper end of the angle positioning piece 5, a screw barrel 24 threadedly connected to the screw 23 is fixedly connected to the inner wall of the sleeve 22, a plurality of dividing grooves 34 are evenly opened on the outer circumference of the sleeve 22, the strut 13 is rotatably connected in the dividing groove 34, the other end of the strut 13 is rotatably connected to the inner groove slider 12, the upper end of the screw 23 is fixedly connected to the support rod 11, and the support rod 11 is provided with the centering structure.

[0035] like Figure 6 and 7 As shown, a first rotating handle 21 is fixedly connected to the support rod 11. By rotating the first rotating handle 21, the first rotating handle 21 drives the screw rod 23 to rotate. During the rotation of the screw rod 23, the screw rod 23 cooperates with the thread of the screw barrel 24 on the inner wall of the sleeve 22. Since one end of the support rod 13 is evenly rotated and arranged in the indexing groove 34 of the sleeve 22, and the positioning pin 26 on the inner groove slider 12 at the other end of the support rod 13 is arranged in the positioning groove 10, the sleeve 22 can be limited, and then the sleeve 22 is driven to move along the axial direction of the screw rod 23 through the thread cooperation of the screw rod 23 and the screw barrel 24. When the sleeve 22 moves up and down, it drives the support rod 13 to swing, and the support rod 13 drives the inner groove slider 12 to slide synchronously along the upper end surface of the angle positioning piece 5 respectively.

[0036] The centering structure also includes an annular column 19, a rotating cylinder 27 rotatably connected to the support rod 11 is provided at the lower end of the annular column 19, a storage tank 31 is opened in the annular column 19, and the first rack 15 and the second rack 16 are respectively slidably connected at both ends of the storage tank 31, and a rotating column 30 rotatably connected to the annular column 19 is provided at the center position of the storage tank 31, a spur gear 29 is fixedly connected to the rotating column 30, and the two ends of the spur gear 29 are respectively meshed with the first rack 15 and the second rack 16, and the spur gear 29 is coaxially provided with a worm wheel 18 fixedly connected to the rotating column 30, and a worm 20 meshing with the worm wheel 18 is rotatably connected to the annular column 19, and the ends of the first rack 15 and the second rack 16 are respectively fixedly connected to the target plate 14.

[0037] like Figure 6 and 8As shown in Figure 9, the rotating drum 27 is detachably arranged on the support rod 11, and the annular column 19 is coaxially arranged on the support rod 11 by means of the rotating drum 27. A second rotating handle 33 is arranged at one end of the worm 20. By rotating the second rotating handle 33, the second rotating handle 33 drives the worm 20 to rotate, the worm 20 drives the worm wheel 18 to rotate, the worm wheel 18 drives the rotating column 30 to rotate, and the rotating column 30 drives the spur gear 29 to rotate. During the rotation process, the spur gear 29 drives the first rack 15 and the second rack 16 at both ends to move toward each other, and the storage groove 31 stores and limits the sliding of the first rack 15 and the second rack 16.

[0038] Both ends of the storage tank 31 are provided with splicing blocks 28 fixedly connected to the annular column 19 , and the first rack 15 and the second rack 16 are provided with sliding pins 17 slidably connected to the inner wall of the splicing block 28 .

[0039] like Figure 8 As shown, during the process of the first rack 15 and the second rack 16 moving toward each other, the sliding pin 17 is respectively driven to slide along the inner wall of the splicing block 28, thereby realizing the movement limitation of the first rack 15 and the second rack 16.

[0040] The positioning grooves 10 are evenly arranged on the angle positioning piece 5 , and the inner wall of the inner groove slider 12 is slidably connected with the positioning pin 26 .

[0041] like Figure 6 and 10 As shown, the support rods 13 respectively drive the inner groove sliders 12 to slide synchronously along the upper end surface of the angle positioning piece 5. Since the positioning groove 10 is set to an arc shape in order to adapt to the model of the impeller blade 6, when the inner groove slider 12 pushes the positioning pin 26 to move along the inner wall of the positioning groove 10, the positioning pin 26 will produce a short-distance lateral displacement. Therefore, by setting an inner wall hole on the inner groove slider 12, the movement of the positioning pin 26 is avoided from being limited.

[0042] The upper end of the positioning pin 26 is fixedly connected with a blocking disk 25 , and the diameter of the blocking disk 25 is larger than the inner groove width of the inner groove slider 12 .

[0043] like Figure 7 As shown, the blocking plate 25 is arranged on the upper end of the positioning pin 26 and supported on the upper end of the inner groove slider 12, which can effectively prevent the positioning slide pin 17 from being separated from the limit position of the inner groove slider 12.

[0044] The upper and lower ends of the impeller blades 6 are welded to the opposite surfaces of the impeller upper plate 4 and the impeller bottom plate 7 respectively.

[0045] like Figure 3 and 5As shown, after the impeller blades 6 are positioned, the impeller blades 6 are fixed between the impeller upper plate 4 and the impeller bottom plate 7 by welding.

[0046] The working process of the present invention is as follows: when the present invention is in use, the first mold body 1 and the second mold body 8 are opened, and the impeller chassis 7 is placed between the first mold body 1 and the second mold body 8. After the first mold body 1 and the second mold body 8 are molded together, the semicircular mold holes 32 on the two are spliced ​​into a center receiving hole for clamping and fixing the impeller chassis 7. The first mold body 1 and the second mold body 8 are molded together and fixed by inserting bolts and nuts into the mold holes 3. The angle positioning piece 5 is placed on the impeller chassis 7, and then the impeller blades 6 are evenly inserted into the positioning grooves 10 of the angle positioning piece 5. The impeller upper plate 4 is placed on the upper end of the impeller blades 6. Limited by the semicircular mold holes 32 of the first mold body 1 and the second mold body 8, the impeller upper plate 4 and the impeller chassis 7 are at the same axial position.

[0047] According to the size of the impeller blades 6, in order to ensure that the impeller blades 6 can be adapted to the impeller upper plate 4 and the impeller bottom plate 7, by rotating the first rotating handle 21, the first rotating handle 21 drives the screw rod 23 to rotate, and during the rotation of the screw rod 23, the screw rod 23 is threadedly engaged with the screw barrel 24 on the inner wall of the sleeve 22, thereby driving the sleeve 22 to move along the axial direction of the screw rod 23. Since one end of the support rod 13 is evenly rotated and arranged in the indexing groove 34 of the sleeve 22, when the sleeve 22 moves up and down, the support rod 13 is driven to swing, and the support rod 13 respectively drives the inner groove slider 12 along the axial direction. As the upper end surface of the angle positioning piece 5 slides synchronously, the inner groove slider 12 drives the positioning pin 26 to slide along the positioning groove 10. When the impeller blade 6 is placed in the positioning groove 10, the position of the positioning slide pin 17 in the positioning groove 10 is changed, and then the depth of the impeller blade 6 in the positioning groove 10 is changed according to the size of the impeller blade 6. Since the positioning slide pin 17 is synchronously located in the positioning groove 10 and is located in the same circumference of the angle positioning piece 5, it is ensured that the depth of the impeller blade 6 in the positioning groove 10 of the angle positioning piece 5 is the same.

[0048] At the same time, by rotating the second rotating handle 33, the second rotating handle 33 drives the worm 20 to rotate, the worm 20 drives the worm wheel 18 to rotate, the worm wheel 18 drives the rotating column 30 to rotate, the rotating column 30 drives the spur gear 29 to rotate, and the spur gear 29 drives the first rack 15 and the second rack 16 at both ends to move toward each other during the rotation process, and the storage tank 31 stores and limits the sliding of the first rack 15 and the second rack 16, and the first rack 15 and the second rack 16 are used to drive the mark plate 14 to slide toward both ends synchronously, so that the mark plate 14 is attached to the impeller The two ends of the inner wall of the upper plate 4 ensure that the angle positioning piece 5 is in the same axial position with the impeller chassis 7 and the impeller upper plate 4, and because the depth of the impeller blade 6 inserted into the positioning groove 10 of the angle positioning piece 5 is the same, it ensures that the impeller blade 6 is in the same circumferential position between the impeller chassis 7 and the impeller upper plate 4. After the impeller blade 6 is positioned, the impeller blade 6 is fixed between the impeller upper plate 4 and the impeller chassis 7 by welding to realize the positioning and assembly of the impeller assembly, and then the first mold body 1 and the second mold body 8 are separated to take out the impeller assembly.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning tool for a glass fiber reinforced plastic centrifugal fan impeller, comprising a mold body and an impeller assembly, characterized in that: The mold body comprises a first mold body (1) and a second mold body (8) that can be molded together. The impeller assembly comprises an impeller upper plate (4) and an impeller bottom plate (7). A plurality of impeller blades (6) are arranged between the impeller upper plate (4) and the impeller bottom plate (7). An angle positioning piece (5) is arranged in the impeller assembly. A plurality of positioning grooves (10) that are adapted to the impeller blades (6) are evenly arranged on the angle positioning piece (5). The angle positioning piece (5) is also provided with an umbrella-shaped opening that can be adapted to impeller blades (6) of different sizes. The umbrella-stretching structure comprises a plurality of struts (13) which can be extended synchronously, the ends of the struts (13) are rotatably connected to inner groove sliders (12) which are slidably connected to the angle positioning pieces (5), the inner groove sliders (12) are respectively provided with positioning pins (26) which are slidably connected to the positioning grooves (10), and the upper end of the impeller chassis (7) is also provided with a centering structure which can center the angle positioning piece (5) at the center position of the impeller upper plate (4), and the centering structure comprises a pair of target plates (14) which can be slidably arranged towards each other.

2. The positioning fixture for a glass fiber reinforced plastic centrifugal fan impeller according to claim 1, characterized in that: The first mold body (1) and the second mold body (8) are respectively provided with a semicircular mold hole (32), a plurality of positioning blocks (2) are evenly arranged in the semicircular mold hole (32), and the first mold body (1) and the second mold body (8) are respectively provided with a groove (9) on the opposite ends of the surfaces, and a pair of mold holes (3) are arranged in the groove (9).

3. The positioning fixture for a glass fiber reinforced plastic centrifugal fan impeller according to claim 1, characterized in that: The umbrella structure further comprises a screw rod (23) rotatably connected to the center position of the angle positioning piece (5); a sleeve (22) is arranged at the upper end of the angle positioning piece (5); a screw barrel (24) threadedly connected to the screw rod (23) is fixedly connected to the inner wall of the sleeve (22); a plurality of indexing grooves (34) are evenly arranged on the outer circumference of the sleeve (22); the support rod (13) is rotatably connected in the indexing groove (34); the other end of the support rod (13) is rotatably connected to the inner groove slider (12); the upper end of the screw rod (23) is fixedly connected to a support rod (11); the support rod (11) is provided with the centering structure.

4. The positioning fixture for a glass fiber reinforced plastic centrifugal fan impeller according to claim 3, characterized in that: The centering structure also includes an annular column (19), the lower end of which is provided with a rotating cylinder (27) rotatably connected to the support rod (11), a storage tank (31) is provided in the annular column (19), the two ends of the storage tank (31) are respectively slidably connected to a first rack (15) and a second rack (16), a rotating column (30) rotatably connected to the annular column (19) is provided at the center of the storage tank (31), and the rotating column (30) A spur gear (29) is fixedly connected to the upper part, and the two ends of the spur gear (29) are respectively meshed with the first rack (15) and the second rack (16). The spur gear (29) is coaxially provided with a worm gear (18) fixedly connected to the rotating column (30). The annular column (19) is rotatably connected with a worm (20) meshed with the worm gear (18). The ends of the first rack (15) and the second rack (16) are respectively fixedly connected with the target plate (14).

5. The positioning fixture for a glass fiber reinforced plastic centrifugal fan impeller according to claim 4, characterized in that: Both ends of the storage tank (31) are respectively provided with splicing blocks (28) fixedly connected to the annular column (19), and the first rack (15) and the second rack (16) are respectively provided with sliding pins (17) slidably connected to the inner wall of the splicing block (28).

6. The positioning tool for a glass fiber reinforced plastic centrifugal fan impeller according to claim 1, characterized in that: The positioning grooves (10) are evenly arranged on the angle positioning piece (5), and the inner wall of the inner groove slider (12) is slidably connected with the positioning pin (26).

7. A positioning fixture for a glass fiber reinforced plastic centrifugal fan impeller according to claim 6, characterized in that: The upper end of the positioning latch (26) is fixedly connected to a blocking disk (25), and the diameter of the blocking disk (25) is greater than the inner groove width of the inner groove slider (12).

8. The positioning tool for a glass fiber reinforced plastic centrifugal fan impeller according to claim 1, characterized in that: The upper and lower ends of the impeller blades (6) are respectively welded to the opposite surfaces of the impeller upper plate (4) and the impeller bottom plate (7).

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