A fan hub casting mold and a method of using the same

Abstract

The application discloses a fan wheel hub pouring mold and a using method thereof, and relates to the technical field of wind power generation equipment casting. The fan wheel hub pouring mold comprises a sand box, a protection assembly is arranged at the bottom of the sand box, a sand breaking assembly is arranged outside the protection assembly, the protection assembly comprises a plurality of hydraulic support rods which are vertically arranged below the sand box, a buffer is fixedly installed on the output shaft of each hydraulic support rod, and the buffer is fixedly connected to the bottom of a same steel cable net frame through the buffer, the steel cable net frame is arranged inside the sand box, and the steel cable net frame is used for crushing the sand mold and lifting the wheel hub, the sand breaking assembly comprises a square frame which is fixedly sleeved outside the output shaft of all the hydraulic support rods, and a plurality of puncture cones are fixedly installed on the top of the square frame. The fan wheel hub pouring mold has the effects of high finished product quality and convenient use.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment casting technology, and in particular to a wind turbine hub casting mold. Background Technology

[0002] The wind turbine hub is a key load-bearing component connecting the blades and the main drive shaft. Its casting quality is directly related to the safe operation of the wind turbine. Currently, large wind turbine hubs are usually cast using resin sand molding technology. This involves placing the hub sand mold in a sand box, pouring in molten metal, cooling it, and then using vibration to break the sand so that the sand body is peeled off from the surface of the casting. The sand body will leak out from the bottom of the sand box, and finally the hub casting is obtained.

[0003] However, existing sandbox structures generally suffer from the following technical defects:

[0004] Firstly, during the vibration sand breaking process, as the sand gradually loosens and peels off, the wheel hub casting, weighing several tons, loses the support of the sand mold and will shift in position, thus coming into contact with the bottom plate or side wall of the sand box. Since the wheel hub is made of ductile iron or cast steel, although it has high strength, its toughness is limited. At this time, when it vibrates and collides with the sand box, it is very easy to cause the surface of the casting to be bumped, scratched, or even internal micro-cracks, resulting in huge economic losses.

[0005] Secondly, the current industry standard for sand breaking mainly relies on a vibrating table to apply unidirectional vibration to the sand box, causing the sand to gradually loosen under vibration excitation. However, for large wheel hub castings, the sand mold is large, the sand is dense, and the resin binder is strong. Relying solely on vibration to break the sand often takes a long time, and the sand mold is not completely broken, often requiring manual cleaning, which seriously affects production efficiency. Summary of the Invention

[0006] This invention discloses a wind turbine hub casting mold and its usage method, aiming to solve the technical problem that the existing wind turbine hub casting sand box has insufficient protection efficiency for the finished product and insufficient crushing efficiency for the sand mold in actual use.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A wind turbine hub casting mold includes a sand box, the bottom of which is provided with a protective component to support the hub; a sand-breaking component is provided on the outside of the protective component to break the sand mold.

[0009] The protective assembly includes several hydraulic struts vertically distributed below the sand box. Each hydraulic strut has a buffer fixedly installed on its output shaft and is fixedly connected to the bottom of the same steel cable mesh frame through the buffer. The steel cable mesh frame is distributed inside the sand box and is used to crush the sand mold and lift the wheel hub.

[0010] The sand-breaking assembly includes a square frame that is sleeved and fixed to the outside of the output shafts of all the hydraulic struts. Several piercing cones are fixedly installed on the top of the square frame. When the hydraulic struts drive the steel cable mesh frame to break the sand in the middle of the sand mold, the piercing cones are located below the steel cable mesh frame. When the steel cable mesh frame contacts the hub, the hydraulic struts further drive the piercing cones to vertically insert into the interior of the sand box and further break the sand at the edge of the sand mold.

[0011] Based on existing sand boxes and technologies used in wind turbine hub preparation, a steel cable mesh frame and a piercing cone structure driven by hydraulic struts are installed along the bottom of the lower sand box. An additional buffer, in conjunction with the hydraulic struts, drives the steel cable mesh frame and piercing cone in sequence. First, the steel cable mesh frame breaks the sand at the center of the sand mold. Simultaneously, the crushing of the central sand creates a channel, controlling the positioning and downward movement of the finished workpiece to the surface of the steel cable mesh frame, forming flexible protection. This ensures that the workpiece is flexibly supported by the steel cable mesh frame at any time after falling, completely avoiding rigid collisions with the base plate. After sand breaking, the workpiece is supported at a high position by the steel cable mesh frame, facilitating direct lifting by the lifting equipment. The separation of the workpiece from the base plate also reduces the workload of cleaning residual sand at the bottom of the box, improving working conditions for workers. Then, the piercing cone further breaks the sand at the edges of the sand mold, creating a synergistic effect with the vibration platform. This significantly improves the sand breaking efficiency of traditional equipment. The two operate in tandem, eliminating the need for additional drive motors or cylinders, achieving secondary utilization of mechanical energy. The structure is compact and energy-efficient.

[0012] In a preferred embodiment, a raised base is installed at the bottom of the sand box, and the protective components and the sand-breaking components are both distributed inside the raised base. A support frame is fixedly installed inside the raised base, and the hydraulic strut is vertically installed on the top of the support frame.

[0013] By further installing a raised base structure with a built-in support frame at the bottom of the sand box, the raised base provides installation space for the protective components and sand-breaking components, and the support frame provides installation points for the hydraulic struts, thereby maintaining the structural stability and integrity of the equipment.

[0014] In a preferred embodiment, the main body of the sand box is composed of an upper box, a middle box, and a lower box that are spliced ​​together. Sand molds are stacked inside the upper box, the middle box, and the lower box. A grid base plate is provided at the bottom of the lower box. The protective components are distributed below the grid base plate. The steel cable mesh frame is installed on the top of the grid base plate. The piercing cone that slides through the sand leakage hole on the surface of the grid base plate passes through it. A hidden section is opened inside the grid base plate, and the steel cable mesh frame is embedded in the hidden section.

[0015] By setting a hidden section structure on the grid base plate inside the lower box, the steel cable mesh frame is embedded and installed within the hidden section, ensuring that the inner surface of the lower box is flat. This provides the operating conditions for the steel cable mesh frame without affecting the subsequent placement of the sand mold, thus maintaining the integrity of the equipment's operation.

[0016] In a preferred embodiment, the outer sides of the upper box, the middle box, and the lower box are all provided with lifting lugs, which form a fixed connection.

[0017] By providing lifting lugs on the outside of the sand box, the upper, middle and lower boxes are connected. On the one hand, the lifting lugs can assist the crane in moving the sand box, and on the other hand, the pins and lifting lugs can maintain the stability of the sand box during use.

[0018] A method for using a wind turbine hub casting mold includes the following steps;

[0019] S1: The worker hoists and places the sand mold with the built-in sand core inside the sand box, and then hoists and assembles the sand box. During this process, the sand mold will press against the bottom of the sand box and the top of the steel cable mesh frame.

[0020] S2: After the workers have finished pouring and solidifying the sand mold's internal cavity, the workers use a crane to lift the entire sand box to the top of the vibration platform and fix it in place.

[0021] S3: The worker starts the vibration platform, which drives the entire sand box to vibrate at high frequency. At the same time, the hydraulic support rod starts and performs a preliminary extension action, causing the steel cable mesh frame to move vertically and scrape and break the center position of the sand mold. This causes the sand body in the middle position of the sand mold to collapse first and create a passage, allowing the formed wheel hub part located in the middle of the sand mold to move downward in the center and fall into the surface of the steel cable mesh frame for flexible support.

[0022] S4: Subsequently, the hydraulic strut extends a second time, causing the square frame to move vertically, which causes the piercing cone to insert into the outer periphery of the sand mold, efficiently crushing and removing sand from the outer periphery of the sand mold. At this time, the sand mold has been basically crushed, and the operator can directly remove the wheel hub workpiece from above the steel cable mesh frame.

[0023] As can be seen from the above, the wind turbine hub casting mold provided by the present invention has the following technical effects.

[0024] Firstly, a steel cable mesh frame and piercing cone structure driven by hydraulic struts are installed along the bottom of the lower sand box. An additional buffer is used in conjunction with the hydraulic struts to drive the steel cable mesh frame and piercing cone to run in sequence. The steel cable mesh frame first breaks the sand in the center of the sand mold. The collapse of the central sand body creates a channel, controlling the finished workpiece to move downwards to the surface of the steel cable mesh frame to form flexible protection. This ensures that the workpiece can be flexibly supported by the steel cable mesh frame at any time after it falls, completely avoiding rigid collisions with the side walls and bottom plate of the sand box, thus improving the quality of the finished product.

[0025] Secondly, after the sand is broken, the workpiece will be supported at a high position by the steel cable mesh frame, making it easy for the lifting equipment to directly pick it up. At the same time, the separation of the workpiece from the bottom plate also reduces the amount of cleaning work for the residual sand at the bottom of the box, improving the working conditions of the workers.

[0026] Thirdly, the subsequent sand-breaking process on the edge of the sand mold is completed by the piercing cone, which forms a synergistic effect with the vibration platform. This can greatly improve the sand-breaking efficiency of traditional equipment. The two mechanisms work together without the need to add an additional drive motor or cylinder, realizing the secondary utilization of mechanical energy. The structure is compact and energy-saving. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure proposed in this invention.

[0028] Figure 2 This is a schematic diagram of the internal structure of the sand box proposed in this invention.

[0029] Figure 3 This is a schematic diagram of the lower box structure proposed in this invention.

[0030] Figure 4 This is a schematic diagram of the bottom structure of the lower housing proposed in this invention.

[0031] Figure 5 This is a cross-sectional view of the lower box structure proposed in this invention.

[0032] Figure 6 This is an exploded view of the lower box structure proposed in this invention.

[0033] Figure 7 This is a schematic diagram of the protective component structure proposed in this invention.

[0034] Figure 8 This is a schematic diagram of the sand falling state according to the present invention.

[0035] In the diagram: 1. Sand box; 101. Upper box; 102. Middle box; 103. Lower box; 104. Lifting lugs; 2. Grid base plate; 201. Hidden area; 3. Protective components; 301. Hydraulic strut; 302. Buffer; 303. Steel cable mesh frame; 304. Elevated base; 305. Support frame; 306. Fixing groove; 4. Sand breaking components; 401. Square frame; 402. Piercing cone; 403. Connecting parts. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Reference Figures 1 to 8 A wind turbine hub casting mold includes a sand box 1, with a protective component 3 at the bottom of the sand box 1 to support the hub; and a sand breaking component 4 on the outside of the protective component 3 to break the sand mold.

[0038] The protective component 3 includes several hydraulic struts 301 vertically distributed below the sand box 1. Each hydraulic strut 301 has a buffer 302 fixedly installed on its output shaft and is fixedly connected to the bottom of the same steel cable mesh frame 303 through the buffer 302. The steel cable mesh frame 303 is distributed inside the sand box 1 and is used to crush the sand mold and lift the wheel hub.

[0039] The sand breaking assembly 4 includes a square frame 401 that is sleeved and fixed to the outside of the output shaft of all hydraulic struts 301. Several piercing cones 402 are fixedly installed on the top of the square frame 401. The piercing cones 402 are vertically inserted into the inside of the sand box 1 and break the bottom of the sand mold.

[0040] In this embodiment: the worker hoists and places the sand mold with the built-in sand core inside the sand box 1, then hoists and assembles the sand box 1. During this process, the sand mold will press against the inner bottom of the sand box 1 and the top of the steel cable mesh frame 303. After the worker completes the pouring and solidification of the internal cavity of the sand mold, the worker uses a crane to hoist the entire sand box 1 to the top of the vibration platform and fix it. Then the worker starts the vibration platform, which drives the entire sand box 1 to vibrate at high frequency. At the same time, the hydraulic support rod 301 is activated and performs initial extension. The movement causes the steel cable mesh frame 303 to move vertically. The steel cable mesh frame 303 generates a shearing and crushing force on the center of the sand mold, causing the sand in the center of the mold to collapse preferentially and create a channel. This allows the formed wheel hub component located in the center of the sand mold to move downwards and land on the surface of the steel cable mesh frame 303 for flexible support. During this process, the buffer 302, subjected to the downward pressure of the formed wheel hub component, causes the steel cable mesh frame 303 to move downwards slightly, thus buffering the impact force when the formed wheel hub component contacts it. The specific details are shown in the attached diagram. Figure 8 As shown, the hydraulic strut 301 then extends a second time, causing the square frame 401 to move vertically, which causes the piercing cone 402 to insert into the outer periphery of the sand mold, efficiently crushing and removing sand from the outer periphery of the sand mold. At this time, the sand mold has been basically crushed, and the operator can directly remove the wheel hub workpiece from above the steel cable mesh frame 303.

[0041] In the above scheme, it is worth noting that the piercing cone 402 is located below the steel cable mesh frame 303. During the vertical movement of the steel cable mesh frame 303 via the hydraulic strut 301, the distance it moves is less than the distance between the piercing cone 402 and the steel cable mesh frame 303. This ensures that during the process of crushing the sand in the middle position of the steel cable mesh frame 303, the piercing cone 402 will not come into contact with the sand outside the sand mold and break until the formed hub part comes into contact with the steel cable mesh frame 303. Then, the hydraulic strut 301 extends a second time, and the extension stroke at this time allows the piercing cone 402 to come into contact with the sand outside the sand mold and break.

[0042] Preferably, the buffer 302 is a spring-damped buffer 302, which can both ensure buffer support for the shaped wheel hub and ensure that the hydraulic strut 301 can further drive the piercing cone 402 to rise.

[0043] The above technical solution embodies the main technical innovation of this application: mainly, the steel cable mesh frame 303 forms a shearing and crushing force on the center position of the sand mold, causing the sand in the middle position of the sand mold to collapse and fall first. At this time, the sand around the sand mold will form a central limiting force on the formed wheel hub, preventing the formed wheel hub from shifting to the surrounding area, avoiding contact with the inner wall of the sand box 1, and finally flexibly supporting the sand through the steel cable mesh frame 303 and continuing to fall, thereby improving the safety of the wheel hub product.

[0044] It is worth noting that the above-mentioned steel cable mesh frame 303 has a certain degree of flexibility, which means that when the steel cable mesh frame 303 is compressed by the weight of the formed wheel hub part itself, the steel cable mesh frame 303 will undergo a certain degree of flexible deformation under pressure. However, the structural strength of the steel cable mesh frame 303 is stronger than that of the sand mold, ensuring that the steel cable mesh frame 303 can effectively shear and break the sand mold during the rising process.

[0045] Among them, the surface of the steel cable mesh frame 303 is composed of grid-shaped steel wires, which can improve the effect of shearing and crushing sand molds.

[0046] Reference Figures 1 to 8 In a preferred embodiment, the main body of the sand box 1 is composed of an upper box 101, a middle box 102, and a lower box 103 that are spliced ​​together. The sand mold is stacked inside the upper box 101, the middle box 102, and the lower box 103. A grid base plate 2 is provided at the bottom of the lower box 103. The protective components 3 are distributed below the grid base plate 2. The steel cable mesh frame 303 is installed on the top of the grid base plate 2. The sliding piercing cone 402 penetrates through the sand leakage hole on the surface of the grid base plate 2. A hidden section 201 is opened inside the grid base plate 2. The steel cable mesh frame 303 is embedded in the hidden section 201, and the piercing cone 402 is located on the outer periphery of the steel cable mesh frame 303. This ensures that the piercing cone 402 will not contact the steel cable mesh frame 303 during its ascent, and can also pass through the sand leakage hole on the surface of the grid base plate 2 and contact the sand core to break it.

[0047] Workers hoist and place the sand mold with the built-in sand core inside the lower box 103. Then, the upper box 101 and the middle box 102 of the sand box 1 are hoisted and assembled in sequence. During this process, the sand mold will cover the inner bottom of the sand box 1 and the top of the steel cable mesh frame 303. The steel cable mesh frame 303 will be hidden inside the hidden section 201, which ensures that the sand falling efficiency at the bottom of the sand box 1 will not be affected, and also ensures that the steel cable mesh frame 303 is flush with the surface of the grid base plate 2 in the initial state, which facilitates the installation of the sand mold.

[0048] Among them, reference Figure 3 , Figure 4 and Figure 5 As shown, the steel cable mesh frame 303 is embedded in the hidden section 201. The two are of the same size, which can ensure the overall structural strength of the grid base plate 2. Under normal conditions, only the grid base plate 2 and the steel cable mesh frame 303 are in contact with the sand mold, while the square frame 401, the piercing cone 402 and the hydraulic strut 301 are all located on the lower outside of the grid base plate 2 and are not in contact with the sand mold. When the hub part comes into contact with the steel cable mesh frame 303, the hydraulic strut 301 will drive the square frame 401 and the piercing cone 402 to rise, so that the piercing cone 402 passes through the sand leakage hole on the surface of the grid base plate 2 and comes into contact with the sand mold for further crushing and sand removal.

[0049] Specifically, the sand mold is composed of molding sand and adhesive. After being broken by the piercing cone 402 and the steel cable mesh frame 303, the vibration sand dropping efficiency is higher. After the sand drops through the sand leakage holes on the surface of the grid base plate 2, it will be stored in the storage space below the vibration platform and can be reused later. In addition, in order to ensure the service life of the hydraulic strut 301, a dustproof rubber sleeve needs to be put on the telescopic end of the hydraulic strut 301.

[0050] In order to further improve the protective effect of the formed wheel hub, a rubber layer can be set on the surface of the steel cable mesh frame 303 to reduce the impact of scratches on the formed wheel hub. It should be noted that the steel cable mesh frame 303 will not come into contact with the high temperature molten metal during the casting process, and the sand core plays an isolation role in this process.

[0051] Reference Figures 1 to 6 , Figure 8 In a preferred embodiment, a raised base 304 is installed at the bottom of the sand box 1. The protective component 3 and the sand breaking component 4 are both distributed inside the raised base 304. A support frame 305 is fixedly installed inside the raised base 304, and a hydraulic strut 301 is vertically installed on the top of the support frame 305. The support frame 305 provides support for the entire protective component 3 and the sand breaking component 4.

[0052] The raised base 304 has a fixed groove 306 on its edge that connects to the external vibration platform. The upper box 101, the middle box 102 and the lower box 103 are all provided with lifting lugs 104 on their outer sides. The lifting lugs 104 and bolts are used to fix the three together. At the same time, when the upper box 101, the middle box 102 and the lower box 103 are moved, the lifting lugs 104 can also be connected to the crane.

[0053] Specifically, a connector 403 is fitted and fixed to the outside of the output shaft of each hydraulic strut 301, and several hydraulic struts 301 are fixedly connected to the square frame 401 through the connector 403.

[0054] Working principle: During use, the worker hoists and places the sand mold with the built-in sand core inside the lower box 103. Then, the upper box 101 and the middle box 102 of the sand box 1 are hoisted and assembled in sequence. During this process, the sand mold will cover the inner bottom of the sand box 1 and the top of the steel cable mesh frame 303, which will be hidden inside the concealed section 201. After the worker completes the pouring and solidification of the internal cavity of the sand mold, the worker uses a crane to hoist the entire sand box 1 to the top of the vibrating platform and fix it. Then, the worker starts the vibrating platform, which drives the entire sand box 1. High-frequency vibration is applied, and simultaneously, the hydraulic strut 301 is activated and begins to extend, causing the steel cable mesh frame 303 to move vertically. This shears and breaks the sand at the center of the sand mold, causing the sand in the middle of the mold to collapse first and create a channel. This allows the formed wheel hub component located in the middle of the sand mold to move downwards and land on the surface of the steel cable mesh frame 303 for flexible support. In this way, the formed wheel hub component will not contact the side wall of the sand box 1 or collide with the bottom of the sand box 1. Combined with the flexible steel cable mesh frame 303, maximum protection can be achieved. The specific state is shown in the attached figure. Figure 8 As shown, the hydraulic strut 301 then extends a second time, causing the square frame 401 to move vertically, which causes the piercing cone 402 to insert into the outer edge of the sand mold, efficiently crushing and removing sand from the outer edge of the sand mold. During this period, the formed wheel hub parts located on the surface of the steel cable mesh frame 303 will also be affected by the vibration force and continue to be crushed. After the sand is finally removed, the workers use a crane to dismantle the upper box 101 and the middle box 102 in sequence, and then directly take out the wheel hub parts from above the steel cable mesh frame 303.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art who makes equivalent substitutions or changes to the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. For example, the steel cable mesh frame 303 and the piercing cone 402 of the present application can be equipped with driving components for lifting and lowering, thereby realizing the function of staged crushing of sand mold. As long as the technical solution that can realize the crushing of the middle of the sand mold first and the crushing of the edge later is within the scope of protection of the present application.

Claims

1. A wind turbine hub casting mold, comprising a sand box (1), characterized in that, The bottom of the sand box (1) is provided with a protective component (3) to support the wheel hub; the outer side of the protective component (3) is provided with a sand-breaking component (4) to break the sand mold. The protective component (3) includes several hydraulic struts (301) vertically distributed below the sand box (1). Each hydraulic strut (301) has a buffer (302) fixedly installed on its output shaft and is fixedly connected to the bottom of the same steel cable mesh frame (303) through the buffer (302). The steel cable mesh frame (303) is distributed inside the sand box (1) and is used to crush the sand mold and lift the wheel hub. The sand breaking assembly (4) includes a square frame (401) sleeved and fixed to the outside of the output shaft of all the hydraulic struts (301). Several piercing cones (402) are fixedly installed on the top of the square frame (401). When the hydraulic struts (301) drive the steel cable mesh frame (303) to break the sand in the middle of the sand mold, the piercing cones (402) are located below the steel cable mesh frame (303). When the steel cable mesh frame (303) contacts the hub, the hydraulic struts (301) further drive the piercing cones (402) to be vertically inserted into the interior of the sand box (1) and further break the sand at the edge of the sand mold. The piercing cone (402) is located below the steel cable mesh frame (303). During the vertical movement of the steel cable mesh frame (303) via the hydraulic strut (301), the distance it moves is less than the distance between the piercing cone (402) and the steel cable mesh frame (303). This ensures that during the process of the steel cable mesh frame (303) crushing the sand in the middle position, the piercing cone (402) will not come into contact with the sand outside the sand mold and break until the formed hub part comes into contact with the steel cable mesh frame (303). Then, the hydraulic strut (301) extends for the second time. At this time, the extension stroke can make the piercing cone (402) come into contact with the sand outside the sand mold and break.

2. The wind turbine hub casting mold according to claim 1, characterized in that, The main body of the sand box (1) is composed of an upper box (101), a middle box (102) and a lower box (103) that are spliced ​​together. The sand mold is stacked inside the upper box (101), the middle box (102) and the lower box (103).

3. The wind turbine hub casting mold according to claim 2, characterized in that, The bottom of the lower housing (103) is provided with a grid base plate (2), the protective components (3) are distributed below the grid base plate (2), the steel cable mesh frame (303) is installed on the top of the grid base plate (2), and the sliding piercing cone (402) penetrates through the sand leakage hole on the surface of the grid base plate (2).

4. The wind turbine hub casting mold according to claim 3, characterized in that, The grid base plate (2) has a hidden section (201) inside, and the steel cable mesh frame (303) is embedded in the hidden section (201).

5. The wind turbine hub casting mold according to claim 1, characterized in that, The bottom of the sand box (1) is equipped with a raised base (304), and the protective component (3) and the sand breaking component (4) are both distributed inside the raised base (304).

6. The wind turbine hub casting mold according to claim 5, characterized in that, The raised base (304) has a support frame (305) fixedly installed inside, and the hydraulic strut (301) is vertically installed on the top of the support frame (305).

7. A wind turbine hub casting mold according to claim 5, characterized in that, The edge of the raised base (304) is provided with a fixing groove (306) for connecting with the external vibration platform.

8. The wind turbine hub casting mold according to claim 1, characterized in that, Each of the hydraulic struts (301) has a connector (403) fixedly fitted onto the outside of its output shaft, and several of the hydraulic struts (301) are fixedly connected to the square frame (401) through the connector (403).

9. A wind turbine hub casting mold according to claim 2, characterized in that, The upper box (101), the middle box (102) and the lower box (103) are all provided with lifting lugs (104) on their outer sides, and are fixedly connected by the lifting lugs (104).

10. The method of using a wind turbine hub casting mold according to claim 1, characterized in that, Includes the following steps; S1: The worker hoists and places the sand mold with the built-in sand core inside the sand box (1), and then hoists and assembles the sand box (1). During this process, the sand mold will press against the bottom of the sand box (1) and the top of the steel cable mesh frame (303). S2: After the workers have finished pouring and solidifying the sand mold cavity, the workers use a crane to lift the entire sand box (1) to the top of the vibration platform and fix it. S3: The worker starts the vibration platform, which drives the entire sand box (1) to vibrate at high frequency. At the same time, the hydraulic support rod (301) starts and performs a preliminary extension action, which drives the steel cable mesh frame (303) to move vertically and scrape and break the center position of the sand mold, causing the sand body in the middle position of the sand mold to collapse first and form a passage, allowing the shaped wheel hub part located in the middle of the sand mold to move downward in the center and fall into the surface of the steel cable mesh frame (303) for flexible support. S4: Subsequently, the hydraulic strut (301) extends for the second time, causing the square frame (401) to move vertically, causing the piercing cone (402) to insert into the outer periphery of the sand mold, and efficiently crushing and removing sand from the outer periphery of the sand mold. At this time, the sand mold has been basically crushed, and the operator can directly remove the wheel hub workpiece from above the steel cable mesh frame (303).

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