Cylindrical centrifugal fan shell polishing device

Abstract

The invention discloses a cylindrical centrifugal fan shell polishing device, and relates to the technical field of polishing machining and manufacturing, the cylindrical centrifugal fan shell polishing device comprises an intelligent polishing mechanical arm and a polishing assembly connected with the intelligent polishing mechanical arm, the intelligent polishing mechanical arm comprises a main motor, and the polishing assembly comprises a spline shaft fixedly connected with an output shaft of the main motor; the two sides of the bottom end of the spline shaft are symmetrically and rotationally connected with two swing rods, the bottoms of the two swing rods are detachably connected with semi-cylindrical grinding wheels, and the two semi-cylindrical grinding wheels can be folded to form a cylinder; the unfolding assembly can enable the two swing rods to be opened from the parallel state to the two sides to be in the linear state with the opening angle being 180 degrees, and therefore the two folded semi-cylindrical grinding wheels are separated and unfolded. The two semi-cylindrical grinding wheels are unfolded into a straight line, so that the sweeping radius of the grinding wheels during rotation can be enlarged, and the requirement for grinding the large-area part of the shell is met.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding processing and manufacturing, and in particular, to a grinding device for the shell of a cylindrical centrifugal ventilator. Background Art

[0002] The centrifugal fan belongs to a kind of impeller machinery, mainly composed of components such as a circular casing, an impeller, a machine shaft, a collector, an exhaust port and a base. It is a relatively precise operating machinery. By relying on the rotation of the impeller, a negative pressure is formed inside the fan, sucking in external gas and discharging it through the impeller passage and the volute. It is widely used in the dust removal and ventilation systems in various fields such as energy, environment, and aviation, and is one of the main energy-consuming equipment in industrial and agricultural production. At present, some steps in the processing of centrifugal fans still require manual operation and cannot fully enter the production process of intelligent manufacturing equipment industry.

[0003] As an important structure of the centrifugal ventilator, the casing is usually made by splicing and welding several stamping profiles and finally spraying anti-rust paint. Usually, after the casing is formed, it is necessary to finely grind its inside and outside to avoid problems such as welding beads and burrs caused by stamping processing from being blocked and unstable during subsequent assembly of the remaining parts. After grinding, the inner wall is smooth and will not affect the air volume of the centrifugal fan. At the same time, grinding can also provide better adhesion during subsequent paint spraying.

[0004] In the existing grinding technology, there is still a situation where workers hold angle grinders by hand for grinding. However, the grinding wheel on the angle grinder is relatively small, and it can handle the grinding of corners and edges. For the large-area side parts of the casing, due to the limited contact area between the grinding wheel and the casing, it will be very time-consuming and laborious at this time. Moreover, when manually grinding, workers have to endure high-intensity noise and a large amount of grinding dust, which is very unfriendly to the health of workers.

[0005] To solve the above problems, a grinding device for the shell of a cylindrical centrifugal ventilator is proposed to replace inefficient manual grinding with an intelligent grinding machine and improve the processing efficiency. Summary of the Invention

[0006] To solve the above technical problems, a grinding device for the shell of a cylindrical centrifugal ventilator is provided, and this technical solution solves the problems raised in the above background art.

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

[0008] The present invention provides a grinding device for the outer shell of a cylindrical centrifugal ventilator, which includes an intelligent grinding robotic arm and a grinding component connected to the intelligent grinding robotic arm. The intelligent grinding robotic arm includes a main motor, and the grinding component includes a spline shaft fixedly connected to the output shaft of the main motor. Two swing rods are symmetrically and rotatably connected to both sides of the bottom end of the spline shaft. Removable semi-cylindrical grinding wheels are connected to the bottoms of the two swing rods. The two semi-cylindrical grinding wheels can be closed to form a cylinder. It further includes an unfolding component fixedly connected to the housing of the main motor. The unfolding component can open the two swing rods from a parallel state to a linear state with an opening angle of 180° on both sides, so as to separate and unfold the two closed semi-cylindrical grinding wheels to obtain a larger grinding area.

[0009] Further, the unfolding component includes a sliding sleeve slidably connected to the outside of the spline shaft. Two short arms are symmetrically and fixedly connected to both sides of the sliding sleeve. Connecting rods are rotatably connected to the ends of the two short arms away from the sliding sleeve. The ends of the two connecting rods away from the short arms are respectively rotatably connected to the middle parts of the two swing rods.

[0010] A rotating ring is rotatably connected above the outside of the sliding sleeve. Two push-pull rods are symmetrically and fixedly connected to both sides of the rotating ring. A lifting ring is fixedly connected to the tops of the two push-pull rods. The lifting ring is sleeved on the outside of the spline shaft. An electric cylinder is fixedly connected to one side of the lifting ring.

[0011] The unfolding component further includes a bracket fixedly connected to the outer shell of the main motor. A through hole is opened in the middle of the bottom of the bracket. The through hole is sleeved on the outside of the spline shaft. The outer parts of the two push-pull rods are respectively slidably connected to both sides inside the bracket. The cylinder body of the electric cylinder is fixedly connected to one side of the inner wall of the bracket.

[0012] Further, T-shaped wedges are fixedly connected to the bottoms of the two swing rods. Cavities are opened at the tops of the two semi-cylindrical grinding wheels. The two T-shaped wedges are respectively fitted inside the two cavities and bolted and fixed.

[0013] Further, there is no contact between the inner ring of the lifting ring and the spline shaft, and there is no contact between the through hole and the spline shaft.

[0014] Further, the spline shaft is a hollow shaft rod with both ends penetrating.

[0015] Further, it further includes a dust removal component. The dust removal component includes a through hole opened above the spline shaft. The through hole is communicated with the hollow cavity of the spline shaft. The dust removal component further includes a sleeve. The sleeve is rotatably connected to the outside above the spline shaft corresponding to the through hole. A connecting pipe is fixedly communicated with one side of the sleeve. The connecting pipe is fixedly connected to the side of the bracket correspondingly. The dust removal component further includes a bag filter. The air inlet of the bag filter is fixedly communicated with the connecting pipe through a conduit.

[0016] Further, it further includes a base. A processing slide is slidably connected to the top of the base.

[0017] Furthermore, a screw rod is rotatably connected to the middle of the base. The outer thread of the screw rod is connected to the inside of the processing slide table. One end of the screw rod is fixedly connected to a driving motor, and the outer shell of the driving motor is fixedly installed on one side of the base.

[0018] As described above, the characteristics and advantages of a cylindrical centrifugal fan housing grinding device in the present invention are:

[0019] When the semi-cylindrical grinding wheels are closed to form a cylinder, they can grind the corners and edges of the housing in the form of an ordinary grinding wheel. When the two semi-cylindrical grinding wheels are unfolded, the grinding sweep radius during rotation can be enlarged, the contact area with the housing can be increased, and the demand for large-area grinding can be met. This avoids the situation in the prior art where, due to the small size of the angle grinder wheel, it is very time-consuming and laborious to continue using the angle grinder to grind the large-area side parts of the housing. In addition, after the device is inserted into the housing through the air inlet and then unfolded, the inner wall of the air inlet can be ground using the arc surface of the semi-cylindrical grinding wheel, the inner wall of the housing opposite the air inlet can be ground using the flat surface of the semi-cylindrical grinding wheel, and the inner wall of the side of the housing can be ground using the end of the semi-cylindrical grinding wheel far from the spline shaft. This avoids the situation in the prior art where workers drill into the housing to grind manually, achieving the purpose of improving work efficiency.

[0020] By driving the lifting ring to rise, the sliding sleeve is synchronously lifted. The sliding sleeve then drives the short arms on both sides to lift upward. The short arms are transmitted through the corresponding connecting rods, causing the swing rod to deflect outward with the rotation connection point between its top and the spline shaft as the center. Eventually, the two semi-cylindrical grinding wheels at the bottom are driven to separate and unfold outward. When the spline shaft is rotated after unfolding, the circular area swept by the semi-cylindrical grinding wheels driven to rotate will be larger. The operation is automated, avoiding the situation in the prior art where, for large-area grinding, workers need to manually replace the angle grinder with a larger-sized grinding wheel, thus improving the efficiency of large-area grinding.

[0021] After the bag filter pumps air out of its intake pipe to create negative pressure, negative pressure will be formed in sequence in the connecting pipe, sleeve, through hole, and the hollow cavity of the spline shaft. Then, under the action of the external atmospheric pressure, the dust diffused in the air during grinding is sucked through the hollow cavity of the spline shaft and finally purified by the bag filter. The above purification measures greatly improve the cleanliness of the grinding processing environment, ensure the physical health of workers, and avoid the situation in the prior art of manual grinding where workers have to endure high-intensity noise and a large amount of grinding dust, which is very unfriendly to the health of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure shown in the present invention;

[0023] Figure 2 For Figure 1 The enlarged schematic view of part A in

[0024] Figure 3 The schematic structural view of the intelligent grinding robotic arm shown in the present invention;

[0025] Figure 4 The assembly schematic view of the grinding component and the unfolding component shown in the present invention;

[0026] Figure 5 The schematic structural view of the grinding component shown in the present invention;

[0027] Figure 6 The exploded schematic view of the structure of the grinding component shown in the present invention;

[0028] Figure 7 The schematic structural view of the unfolding component shown in the present invention;

[0029] Figure 8 For Figure 7 The schematic view of another perspective of the structure in

[0030] Figure 9 The exploded schematic view of the structure of the unfolding component shown in the present invention;

[0031] Figure 10 The schematic view of two swing rods changing from a parallel state to a straight state with an opening angle of 180° as shown in the embodiment of the present invention;

[0032] Figure 11 The schematic structural view of the air outlet hole, the sleeve and the connecting pipe shown in the present invention;

[0033] Figure 12 The connection schematic view of the bag filter and the connecting pipe shown in the present invention;

[0034] Figure 13 The simplified schematic view of the grinding state when the semi-cylindrical grinding wheel shown in the present invention is unfolded.

[0035] Among them, the reference numerals in the present invention are:

[0036] 11. Intelligent grinding robotic arm; 111. Main motor; 12. Base; 13. Machining slide; 14. Screw; 15. Driving motor;

[0037] Grinding component: 21. Spline shaft; 22. Swing rod; 23. T-shaped wedge; 24. Semi-cylindrical grinding wheel; 25. Cavity;

[0038] Unfolding component: 31. Sliding sleeve; 32. Short arm; 33. Connecting rod; 34. Rotating ring; 35. Push-pull rod; 36. Pulling ring; 37. Electric cylinder; 38. Bracket; 381. Through hole;

[0039] Dust removal assembly: 41, air outlet; 42, sleeve; 43, connecting pipe; 44, bag filter. Specific implementation mode

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Refer to Figures 1-13 As shown, it is an embodiment of the present invention, and a grinding device for the outer shell of a cylindrical centrifugal ventilator provided will be elaborated in detail below:

[0042] A grinding device for the outer shell of a cylindrical centrifugal ventilator, refer to Figures 1-5 As shown, it includes an intelligent grinding robotic arm 11 and a grinding assembly connected to the intelligent grinding robotic arm 11. The intelligent grinding robotic arm 11 includes a main motor 111. The grinding assembly includes a spline shaft 21 fixedly connected to the output shaft of the main motor 111. Two swing rods 22 are symmetrically and rotatably connected to both sides of the bottom end of the spline shaft 21. Removably connected to the bottom of both swing rods 22 are two semi-cylindrical grinding wheels 24, and the two semi-cylindrical grinding wheels 24 can be closed to form a cylinder.

[0043] Specifically in this embodiment, refer to Figure 6 As shown, the above-mentioned detachable connection method is that T-shaped wedges 23 are fixedly connected to the bottoms of both swing rods 22, cavities 25 are formed at the tops of the two semi-cylindrical grinding wheels 24, and the two T-shaped wedges 23 are respectively fitted inside the two cavities 25 and bolted and fixed.

[0044] It should be noted that in the present invention, the intelligent grinding robotic arm 11 adopts an existing mature product, which can accurately drive the rotating grinding wheel through each target coordinate point in space according to the set route, so as to achieve the purpose of replacing manual grinding. Specifically in this embodiment, refer to Figure 3As shown, the intelligent grinding robot arm 11 includes a mounting base installed on the ground, and the mounting base is provided with a support column along the ZZ direction, the support column can be driven by a corresponding servo motor to rotate in the plane formed by XX and YY, a long swing arm is provided at the top of the support column, the long swing arm can be driven by a corresponding servo motor to rotate in the plane formed by XX and ZZ to achieve pitch adjustment, a short swing arm is provided at the end of the long swing arm away from the support column, similarly, the short swing arm can also be driven by a corresponding servo motor to rotate in the plane formed by XX and ZZ to achieve pitch adjustment, the above two pitch adjustments can adjust the height of the working end of the robot arm, another servo motor is buried in the end of the short swing arm away from the long swing arm, the driving end of the servo motor rotates in the plane formed by XX and YY, the driving end of the servo motor is fixedly connected to a frame for installing the main motor 111, the main motor 111 can also be driven by a corresponding servo motor in the frame and rotate in the plane formed by YY and ZZ, this is the prior art, and no further elaboration is given here.

[0045] It is worth noting that the above description of introducing the rotating plane is only for the purpose of more clearly describing the movement position relationship between the various structures in the intelligent grinding robot arm 11, and is not for the purpose of limiting the movement orientation of the structure.

[0046] In this embodiment, when the two semi-cylindrical grinding wheels 24 are closed into a cylinder, they can grind the corners of the shell in the form of ordinary grinding wheels. During grinding, the spline shaft 21 is driven to rotate by the main motor 111, the spline shaft 21 drives the swing rod 22 to rotate, and the swing rod 22 drives the two semi-cylindrical grinding wheels 24 to rotate. When the two semi-cylindrical grinding wheels 24 are opened outward to form a straight line, at this time, the radius of the circle swept by the grinding wheel during rotation and grinding will be converted from the radius length of the closed cylinder to the total length of the swing rod 22 length plus the semi-cylindrical grinding wheel 24 length, such as Figure 10 As shown, by expanding the sweep radius, the contact area between the grinding wheel and the housing during grinding is increased, and finally the demand for large-area grinding is met. Specifically in this embodiment, as shown in FIG. Figure 13As shown, the flow direction of the airflow in the housing is bcd, where b is the air inlet and d is the air outlet. The inner cavity diameter of the housing is larger than the diameter of its air inlet. If the device is extended from the air inlet into the housing and then unfolded, as shown in the figure, the semi-cylindrical grinding wheel 24 can be used to grind the inner wall of the air inlet in an arc shape, that is, the upper surface of the semi-cylindrical grinding wheel 24 in this figure is used to grind the E mark in the figure. Further, the semi-cylindrical grinding wheel 24 is used to grind the flat surface of the semi-cylindrical grinding wheel 24. The inner wall of the shell opposite to the air inlet can be polished, that is, the lower surface of the semi-cylindrical grinding wheel 24 in the figure, and the F mark in the figure can be polished. Further, the inner wall of the shell side can be polished by using the end of the semi-cylindrical grinding wheel 24 away from the spline shaft 21, that is, the end of the semi-cylindrical grinding wheel 24 in the figure away from the rocker arm 22, and the G mark in the figure can be polished, which avoids the situation in the prior art of manually drilling into the inside of the shell for polishing, thereby improving work efficiency.

[0047] See also Figure 10 As shown, the cylindrical centrifugal fan casing grinding device also includes an unfolding assembly fixedly connected to the casing of the main motor 111. The unfolding assembly can enable the two rocker arms 22 to open from a parallel state to both sides into a straight state with an opening angle of 180°, thereby separating and unfolding the two closed semi-cylindrical grinding wheels 24 to obtain a larger grinding area.

[0048] See also Figures 7-9 As shown, the unfolding assembly includes a sliding sleeve 31 slidably connected to the outside of the spline shaft 21, two short arms 32 are symmetrically fixedly connected to the two sides of the sliding sleeve 31, and the ends of the two short arms 32 away from the sliding sleeve 31 are rotatably connected to connecting rods 33, and the ends of the two connecting rods 33 away from the short arms 32 are rotatably connected to the two swing rods 22 respectively, and the upper part of the sliding sleeve 31 is rotatably connected to a rotating ring 34, and two push-pull rods 35 are symmetrically fixedly connected to the two sides of the rotating ring 34, and the tops of the two push-pull rods 35 are commonly fixedly connected to a lifting ring 36. The inner ring of the pull ring 36 does not contact the spline shaft 21, and the lifting ring 36 is sleeved on the outside of the spline shaft 21. One side of the lifting ring 36 is fixedly connected to the electric cylinder 37. The unfolding assembly also includes a bracket 38 fixedly connected to the outer shell of the main motor 111. A through hole 381 is opened in the middle of the bottom of the bracket 38. The through hole 381 does not contact the spline shaft 21. The through hole 381 is sleeved on the outside of the spline shaft 21. The outsides of the two push-pull rods 35 are respectively slidably connected to the inner sides of the bracket 38, and the cylinder body of the electric cylinder 37 is fixedly connected to one side of the inner wall of the bracket 38.

[0049] In this embodiment, when it is necessary to automatically separate and expand the two semi-cylindrical grinding wheels 24 that are closed together to obtain a larger grinding area, first, the electric cylinder 37 contracts, which in turn drives the lifting ring 36 to rise. The lifting ring 36 is transmitted through the push rod 35, so that the lower rotating ring 34 is lifted upward. Since there is only the ability to rotate relative to each other between the rotating ring 34 and the sliding sleeve 31 and they cannot move relative to each other in the axial direction, the rotating ring 34 will also synchronously lift the sliding sleeve 31. The sliding sleeve 31 then drives the short arms 32 on both sides to lift upward. The short arms 32 are further transmitted through the corresponding connecting rods 33, causing the swing rod 22 to deflect outward with the rotational connection between its top and the spline shaft 21 as the center of the circle. Eventually, the two semi-cylindrical grinding wheels 24 at the bottom are driven to separate and expand outward. When the spline shaft 21 is rotated after the expansion, since the distance between the two semi-cylindrical grinding wheels 24 and the spline shaft 21 becomes larger at this time, that is, the circular area swept by the semi-cylindrical grinding wheels 24 when driven to rotate is larger, the efficiency of large-area grinding is thus improved.

[0050] Refer to Figure 1 and Figures 11-12 As shown, the dust removal assembly is further included in the grinding device for the outer shell of the cylinder type centrifugal ventilator. The dust removal assembly includes a through hole 381 opened above the spline shaft 21. The spline shaft 21 is a hollow shaft rod with both ends penetrating. The through hole 381 communicates with the hollow cavity of the spline shaft 21. The dust removal assembly further includes a sleeve 42. The sleeve 42 is rotatably connected above the outside of the spline shaft 21 corresponding to the position of the through hole 381. A connecting pipe 43 is fixedly communicated with one side of the sleeve 42. The connecting pipe 43 is fixedly connected to the side surface of the support 38 correspondingly. The dust removal assembly further includes a bag filter 44. The air inlet of the bag filter 44 is fixedly communicated with the connecting pipe 43 through a conduit.

[0051] It should be noted that the bag filter 44 is a common dust removal device. Its structure mainly consists of an upper box body, a middle box body, a lower box body, that is, a hopper, a dust cleaning system, a dust discharging mechanism and other parts. The bag filter 44 is a dry dust removal device. It is suitable for collecting fine, dry non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt. The dust-containing gas is filtered by the filtering action of the fiber fabric. When the dust-containing gas enters the bag filter 44, dust with large particles and high specific gravity settles down due to the action of gravity and falls into the hopper. When the gas containing finer dust passes through the filter material, the dust is retained and the gas is purified. This is the prior art and will not be elaborated here.

[0052] In this embodiment, the intake pipe of the bag filter 44 is arranged at the top of the processing workshop. In this way, when multiple such cylindrical centrifugal fan housing grinding devices are used simultaneously, they can respectively connect the connecting pipe 43 to the intake pipe of the bag filter 44 through the pipeline. During the grinding operation, the bag filter 44 evacuates the inside of its intake pipe to create a negative pressure. Then, due to the transmission of the pipeline, a negative pressure is sequentially formed in the hollow cavities of the connecting pipe 43, the sleeve 42, the through hole 381, and the spline shaft 21. Then, under the action of the external atmospheric pressure, the dust diffused in the air during grinding is sucked through the hollow cavity of the spline shaft 21, and then is transported to the intake pipe of the bag filter 44 through the through hole 381, the sleeve 42, and the connecting pipe 43 in sequence, and finally is purified by the bag filter 44. The above purification measures greatly improve the cleanliness of the grinding processing environment, ensure the physical health of workers, and avoid the situation in the existing grinding technology where manual grinding requires workers to endure high-intensity noise and a large amount of grinding dust, which is very unfriendly to the health of workers.

[0053] Referring to Figure 1 As shown, the cylindrical centrifugal fan housing grinding device further includes a base 12. A processing slide 13 is slidably connected to the top of the base 12. A screw rod 14 is rotatably connected to the middle of the base 12. The outer part of the screw rod 14 is threadedly connected inside the processing slide 13. One end of the screw rod 14 is fixedly connected to a driving motor 15, and the housing of the driving motor 15 is fixedly installed on one side of the base 12.

[0054] It should be noted that a plurality of holes are provided in the processing slide 13. During grinding, after the housing is placed on the processing slide 13, the housing can be fixed on the processing slide 13 through a fixture. Among them, the fixture is in the shape of a "7". Its bottom is inserted into the hole and fixed, and a section of its top that extends horizontally presses on the housing, thus forming a situation of pressing from above and propping from below to achieve the fixation of the housing. Among them, the fixture is fixed in the hole, which is a common technical means in machining. For example, by threadedly connecting two nuts at the upper and lower parts of the vertical rod section of the fixture and rotating the upper and lower nuts to make them approach each other, the processing slide 13 is clamped in the middle, and finally the purpose of anchoring the fixture on the processing slide 13 is achieved, which will not be elaborated here.

[0055] In this embodiment, after the outer shell is fixed on the processing slide table 13, since the range of the lateral movement of the grinding component by the intelligent grinding robot arm 11 in the present invention is relatively small, in order to improve the working efficiency, the driving motor 15 is used to drive the screw 14 to rotate in place inside the base 12, and then, through the acting force between the external thread of the screw 14 and the thread groove between the screw 14 and the processing slide table 13, the processing slide table 13 can be pushed to move laterally under the condition of the guiding and limiting of the base 12, and finally the outer shell is delivered to the semi-cylindrical grinding wheel 24, making up for the shortcoming that the range of the lateral movement of the grinding component by the intelligent grinding robot arm 11 is relatively small.

[0056] Furthermore, in order to improve the intelligent processing degree of the device, a vision recognition system can also be combined. After the outer shell is fixed, the outer shell is scanned by the vision recognition system. When the scanned contour data is consistent with the data of a certain model among the pre-stored various types of outer shells in the system, the type of the fixed outer shell can be recognized, and finally the three-dimensional dimension data of the outer shell can be retrieved. And it is known from the existing automatic processing technology that after knowing the three-dimensional data of the target, the robot arm can accurately move its working end along the preset route according to the preset route data. Specifically in this embodiment, when the processing slide table 13 delivers the outer shells of the same model to the same position, it also means that the starting point of each processing by the intelligent grinding robot arm 11 is the same and unchanged. In this way, as long as the feeding is in place, the intelligent grinding robot arm 11 can quickly perform accurate grinding processing by itself, thus releasing the labor force as much as possible and improving the working efficiency.

[0057] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cylindrical centrifugal fan housing grinding device, characterized in that: The invention comprises an intelligent grinding mechanical arm (11) and a grinding assembly connected to the intelligent grinding mechanical arm (11), wherein the intelligent grinding mechanical arm (11) comprises a main motor (111), and the grinding assembly comprises a spline shaft (21) fixedly connected to the output shaft of the main motor (111), two swing rods (22) are symmetrically rotatably connected to the bottom ends of the spline shaft (21), and the bottom ends of the two swing rods (22) are detachably connected to semi-cylindrical grinding wheels (24), and the two semi-cylindrical grinding wheels (24) can be folded into a cylinder, and further comprises an unfolding assembly fixedly connected to the housing of the main motor (111), and the unfolding assembly can open the two swing rods (22) from a parallel state to two sides to a straight state with an opening angle of 180 degrees, thereby separating and unfolding the two closed semi-cylindrical grinding wheels (24), thereby obtaining a larger grinding area.

2. A cylindrical centrifugal fan housing polishing device according to claim 1, characterized in that: The deployment assembly comprises a sliding sleeve (31) slidably connected to the outside of the spline shaft (21), two short arms (32) are symmetrically fixedly connected to both sides of the sliding sleeve (31), one end of the two short arms (32) away from the sliding sleeve (31) is rotatably connected to a connecting rod (33), and one end of the two connecting rods (33) away from the short arms (32) is rotatably connected to the two swing rods (22) respectively; A rotating ring (34) is rotatably connected to the upper portion of the outer portion of the sliding sleeve (31); two push-pull rods (35) are symmetrically fixedly connected to the two sides of the rotating ring (34); the top ends of the two push-pull rods (35) are commonly fixedly connected to a lifting ring (36); the lifting ring (36) is sleeved on the outer portion of the spline shaft (21); and one side of the lifting ring (36) is fixedly connected to an electric cylinder (37); The unfolding assembly further comprises a bracket (38) fixedly connected to the housing of the main motor (111), a through hole (381) is provided in the middle of the bottom of the bracket (38), the through hole (381) is sleeved on the outside of the spline shaft (21), the outsides of the two push-pull rods (35) are respectively slidably connected to the inside of the bracket (38) on both sides, and the cylinder body of the electric cylinder (37) is fixedly connected to one side of the inner wall of the bracket (38).

3. A cylindrical centrifugal fan housing polishing device according to claim 2, characterized in that: The bottoms of the two swing arms (22) are fixedly connected with T-shaped wedge blocks (23), the tops of the two semi-cylindrical grinding wheels (24) are provided with cavities (25), and the two T-shaped wedge blocks (23) are respectively fitted inside the two cavities (25) and bolted and fixed.

4. A cylindrical centrifugal fan housing polishing device according to claim 3, characterized in that: The inner ring of the lifting ring (36) does not contact the spline shaft (21), and the through hole (381) does not contact the spline shaft (21).

5. A cylindrical centrifugal fan housing polishing device according to claim 4, characterized in that: The spline shaft (21) is a hollow shaft with two ends passing through.

6. A cylindrical centrifugal fan housing polishing device according to claim 5, characterized in that: The invention also includes a dust removal component, which includes a through hole (381) formed above the spline shaft (21), the through hole (381) being in communication with the hollow cavity of the spline shaft (21), the dust removal component also includes a sleeve (42), the sleeve (42) being rotatably connected to the upper part of the exterior of the spline shaft (21) corresponding to the position of the through hole (381), one side of the sleeve (42) being fixedly connected to a connecting pipe (43), the connecting pipe (43) being correspondingly fixedly connected to the side of the bracket (38), and the dust removal component also includes a bag dust collector (44), the air inlet of the bag dust collector (44) being fixedly connected to the connecting pipe (43) via a conduit.

7. A cylindrical centrifugal fan housing polishing device according to claim 6, characterized in that: It also includes a base (12), the top of which is slidably connected to a processing slide (13).

8. A cylindrical centrifugal fan housing polishing device according to claim 7, characterized in that: A screw rod (14) is rotatably connected to the middle of the base (12), the outer thread of the screw rod (14) is connected to the inside of the processing slide (13), one end of the screw rod (14) is fixedly connected to a drive motor (15), and the housing of the drive motor (15) is fixedly mounted on one side of the base (12).

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