Flexible sand cleaning device for inner cavity of aluminum alloy cylindrical shell

Abstract

The invention relates to the technical field of casting post-processing, and provides an aluminum alloy cylindrical shell inner cavity flexible sand cleaning device which comprises a base, a lifting assembly, two driving assemblies, a linear sand cleaning assembly, a curve sand cleaning assembly and a power control assembly. The linear sand cleaning assembly and the curve sand cleaning assembly are connected to the output end of the driving assembly, the power control assembly is connected with the driving assembly and the lifting assembly through pipelines or lines, and the lifting assembly achieves station switching through rotating motion. And the two driving assemblies and the linear sand cleaning assembly and the curve sand cleaning assembly connected with the driving assemblies are driven to enter or break away from an inner cavity of a casting to be cleaned through lifting motion, and the driving assemblies drive the linear sand cleaning assembly and the curve sand cleaning assembly to conduct sand cleaning operation through rotating motion. According to the sand core cleaning device, automatic cleaning of the aluminum alloy cylindrical shell inner cavity sand core can be achieved, and the technical problem that a casting inner cavity is prone to being damaged in the cleaning process is solved.

Description

Technical Field

[0001] This invention relates to the field of casting post-processing technology, and in particular to a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell. Background Technology

[0002] With the rapid development of aerospace, automotive and other industries, the demand for complex aluminum alloy castings is increasing. These castings are usually formed using differential pressure casting technology. Their internal cavities are complex and filled with resin sand cores that need to be removed. The sand removal process in the post-processing of castings is directly related to the final quality and performance of the product.

[0003] Currently, the industry primarily relies on traditional manual methods for cleaning the internal cavities of aluminum alloy cylindrical shell castings. Operators must maintain difficult postures such as lying prone, kneeling, or bending over for extended periods, with one person holding a steel chisel while another uses a sledgehammer to strike and clean the sand core point by point. This method is not only extremely labor-intensive and inefficient, becoming a bottleneck in the production process, but also poses significant safety hazards and quality risks. Slight carelessness during operation can easily scratch or damage the delicate internal surfaces, ribs, and bosses of the casting, leading to its scrapping. There is also a risk of operator injury from the tools. Furthermore, manual cleaning is difficult to meet the pace requirements of mass production, resulting in high costs and poor quality consistency.

[0004] Chinese Patent CN215508936U discloses a device for cleaning sand from the inner hole of a cylindrical casting. This device uses a vertically moving motor to drive a sand-cleaning roller with bristles to clean the inner wall of the cylindrical casting, solving the problem of low efficiency in manual sand cleaning. However, it still has the following shortcomings: the device uses rigid bristles as the cleaning medium, which still poses a risk of scratching the precision inner surface of the casting when cleaning complex internal cavity structures (such as bosses and ribs). Furthermore, its cleaning components lack the ability to adapt to complex contours (such as straight and curved segments), resulting in limited cleaning effect and versatility.

[0005] Therefore, how to provide a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell that can adapt to different inner cavity contours, clean efficiently and thoroughly, operate safely and conveniently, and effectively avoid damage to castings has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of this, in order to overcome the shortcomings of the prior art, the present invention aims to provide a flexible sand cleaning device for the inner cavity of an aluminum alloy cylindrical shell.

[0007] This invention provides a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell. The device includes a base, a lifting assembly, two sets of drive assemblies, a linear sand removal assembly, a curved sand removal assembly, and a power control assembly. The lifting assembly is rotatably fixed on the base. The two sets of drive assemblies are located at both ends of the lifting assembly. The linear sand removal assembly and the curved sand removal assembly are respectively connected to the output end of one set of drive assemblies. The power control assembly is connected to the drive assembly and the lifting assembly through a pipe or line. The lifting assembly achieves position switching through rotational movement, and drives the two sets of drive assemblies and their connected linear and curved sand removal assemblies into or out of the inner cavity of the casting to be cleaned through lifting movement. The drive assembly drives the linear and curved sand removal assemblies to perform sand removal operations through rotational movement.

[0008] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention includes two positioning devices and four fixing sleeves on the base. The two positioning devices are symmetrically arranged on the base, and the four fixing sleeves are arranged in a circumferential array on the base along the lifting assembly.

[0009] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention includes a lifting and rotating frame, a slewing bearing, and a first connecting plate. The lifting and rotating frame is mounted on the base via the slewing bearing. A rotating handle is provided at the front end of the lifting and rotating frame. Linear guide rails are symmetrically installed on the front and rear walls of the lifting and rotating frame. Two second connecting plates are symmetrically connected to one end near the slewing bearing. A positioning pin is installed on each second connecting plate. The first connecting plate is fixed to the upper end of the lifting and rotating frame. Two through slots are provided on the first connecting plate, and two first chain adjusting screws are provided.

[0010] Optionally, in the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention, the lifting assembly further includes a sliding assembly. The sliding assembly includes two sets of third connecting plates, two sets of fourth connecting plates, two sets of boom beams, and two sets of second chain adjusting screws. The two sets of third connecting plates are symmetrically arranged on both sides of the lifting and rotating frame, and their inner sides slide in cooperation with the linear guide rail. Each set of fourth connecting plates is symmetrically connected to both ends of the two sets of third connecting plates and located on the other two sides of the lifting and rotating frame. Each set of boom beams is arranged below a set of fourth connecting plates, and each set of second chain adjusting screws is arranged on a set of fourth connecting plates.

[0011] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention further includes two sets of first guide wheel assemblies, a second guide wheel assembly, and two sets of chains in the lifting component. The first guide wheel assembly includes a pulley base and a first pulley. The pulley base is fixed to the side of the through groove of the first connecting plate, and the first pulley is mounted on the pulley base through bearings. The second guide wheel assembly includes a connecting wheel fork, two second pulleys, a pin, and two sets of bearings. The second pulleys are mounted at both ends of the connecting wheel fork through bearings and pins. One end of the chain is connected and fixed to the first chain adjusting screw, passes through the through groove, and passes around the first pulley and the second pulley in sequence. The other end is connected to the second chain adjusting screw on the fourth connecting plate.

[0012] Optionally, in the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention, the lifting assembly further includes a hydraulic cylinder. The hydraulic cylinder includes a hydraulic cylinder base and a piston rod. The hydraulic cylinder base is hinged to the slewing bearing and located inside the lifting and rotating frame. The piston rod of the hydraulic cylinder is fixedly connected to the connecting wheel fork of the second guide wheel assembly.

[0013] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention includes a driving component comprising a hydraulic motor, a support frame, a bearing seat, and a coupling. The hydraulic motor is fixed to the boom beam via the support frame, the two ends of the bearing seat are fixedly connected to the boom beam, and the coupling is located at the output end of the hydraulic motor.

[0014] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention includes a linear sand removal assembly comprising a first rotating shaft, a plurality of first movable buckles and a plurality of first friction belts. The upper end of the first rotating shaft passes through a bearing seat and is connected to the output end of a hydraulic motor via a coupling. The first rotating shaft is provided with four first grooves. The first movable buckles are hinged in the first grooves by fasteners. The first friction belts are fixed on the first movable buckles by fasteners. Two first friction belts are fixed at the lower end of each first groove by fasteners.

[0015] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention includes a curved sand removal assembly comprising a second rotating shaft, a plurality of second movable buckles, and a plurality of second friction belts. The upper end of the second rotating shaft passes through a bearing seat and is connected to the output end of a hydraulic motor via a coupling. Four second grooves are provided on the second rotating shaft. The second movable buckles are hinged in the second grooves by fasteners. The second friction belts are fixed on the second movable buckles by fasteners. Two second friction belts are fixed at the lower end of each second groove by fasteners. The length of the second friction belts decreases gradually from top to bottom along the axial direction of the second rotating shaft.

[0016] Optionally, the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention includes a power control component comprising a control cabinet, an electric motor, an oil tank, a control panel, a bracket, a speed regulating valve, and a manual directional valve. The manual directional valve is mounted on the control panel, the speed regulating valve is mounted on the bracket, the electric motor is connected to the hydraulic pump in the oil tank, the speed regulating valve is connected to the hydraulic motor through an oil circuit, and the manual directional valve is connected to the hydraulic cylinder through an oil circuit.

[0017] The flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell according to the present invention has the following beneficial technical effects: 1. By completely replacing the traditional high-risk manual sand cleaning method with mechanized and automated operations, the risk of operators directly contacting sharp tools is eliminated, and unhealthy working postures such as bending over and lying down for a long time are avoided, which greatly improves the working environment.

[0018] 2. It is equipped with two types of sand cleaning components, one straight and one curved, and a flexible lifting and rotating mechanism, which can accurately send the cleaning tool into the inner cavity of different depths and different shapes (straight cylinder or curved) to work, achieving high-quality cleaning of complex structure castings and strong versatility.

[0019] 3. By utilizing a high-speed rotating flexible sand-removing component, centrifugal force is used to make the friction belt fully and quickly adhere to the inner wall of the casting, achieving synchronous and continuous cleaning of the entire inner cavity surface. Its efficiency is far higher than manual point-by-point tapping, significantly shortening the sand-removing cycle and meeting the cycle time requirements of mass production.

[0020] 4. A flexible friction belt is used as the cleaning medium. It operates under centrifugal force and can elastically deform and slide over hard metal bosses or ribs, effectively removing resin sand while avoiding damage to the precision internal structure of the casting, thus greatly improving the product qualification rate. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural example diagram of a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell according to an embodiment of the present invention; Figure 2 This is another structural example of a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell according to an embodiment of the present invention; Figure 3 This is an example diagram of the lifting component structure according to an embodiment of the present invention; Figure 4This is another structural example diagram of a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell according to an embodiment of the present invention; Figure 5 This is a partial example diagram of a lifting assembly according to an embodiment of the present invention; Figure 6 This is a partial cross-sectional view of a drive component according to an embodiment of the present invention; Figure 7 This is an example diagram of the structure of a linear sand-cleaning assembly according to an embodiment of the present invention; Figure 8 This is a first partial example diagram of a straight sand-removing assembly according to an embodiment of the present invention; Figure 9 This is a partial example diagram of a straight sand-removing assembly according to an embodiment of the present invention; Figure 10 This is an example diagram of the structure of the curved sand-removing component according to an embodiment of the present invention; Figure 11 This is a first partial example diagram of a curved sand-removing assembly according to an embodiment of the present invention; Figure 12 This is a partial example diagram of a curved sand-removing assembly according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the working state of the linear sand-cleaning assembly according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the working state of the curve sand-removing component according to an embodiment of the present invention; Figure 15 This is a partial example diagram of a power control assembly according to an embodiment of the present invention; In the diagram, 1-base, 2-lifting assembly, 3-drive assembly, 4-straight sand cleaning assembly, 5-curved sand cleaning assembly, 6-power control assembly, 11-positioning device, 12-fixed sleeve, 21-lifting and rotating frame, 22-slewing bearing, 23-sliding assembly, 24-first connecting plate, 25-first guide wheel assembly, 26-hydraulic cylinder, 27-second guide wheel assembly, 28-chain, 31-hydraulic motor, 32-support frame, 33-bearing seat, 34-coupling, 41-first rotating shaft, 42-first movable buckle, 43-first friction belt, 51-second rotating shaft, 52-second movable buckle, 53-second friction belt, 61-control cabinet, 62-... - Motor, 63- Oil tank, 64- Control panel, 65- Bracket, 66- Speed ​​control valve, 67- Manual directional valve, 211- Rotating handle, 212- Linear guide rail, 213- Second connecting plate, 214- Positioning pin, 231- Third connecting plate, 232- Fourth connecting plate, 233- Hoist beam, 234- Second chain adjusting screw, 241- Through groove, 242- First chain adjusting screw, 251- Pulley base, 252- First pulley, 261- Hydraulic cylinder base, 262- Piston rod, 271- Connecting wheel fork, 272- Second pulley, 273- Pin, 274- Bearing, 411- First groove, 511- Second groove. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Figure 1This is a structural example diagram of a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell according to an embodiment of the present invention. Figure 2 This is another structural example diagram of a flexible sand-removing device for the inner cavity of an aluminum alloy cylindrical shell according to an embodiment of the present invention. Figure 1 , Figure 2 As shown, in this embodiment, a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell includes a base 1, a lifting assembly 2, a drive assembly 3, a linear sand removal assembly 4, a curved sand removal assembly 5, and a power control assembly 6. The lifting assembly 2 is rotatably fixed on the base 1. Two sets of drive assemblies 3 are respectively disposed at both ends of the lifting assembly 2. The linear sand removal assembly 4 and the curved sand removal assembly 5 are each connected to one set of drive assemblies 3. The power control assembly 6 is connected to the drive assembly 3 and the lifting assembly 2 through pipes.

[0027] The drive assembly 3, mounted on the lifting assembly 2, achieves vertical position changes, thereby driving the straight sand-cleaning assembly 4 and the curved sand-cleaning assembly 5 into and out of the housing to be cleaned. The rotation of the drive assembly 3 drives the straight sand-cleaning assembly 4 and the curved sand-cleaning assembly 5 to perform rotational cleaning operations. The power control assembly 6 controls the operating status of the drive assembly 3 and simultaneously adjusts the rotational position of the lifting assembly 2 and the lifting height of the drive assembly 3.

[0028] According to an optional example, in this embodiment, the base 1 is provided with symmetrical positioning devices 11 on both sides of the lifting assembly 2, and four sets of fixing sleeves 12 are arranged in the circumferential direction on the lifting assembly 2.

[0029] Figure 3 This is an example diagram of the lifting component structure according to an embodiment of the present invention. Figure 4 This is another structural example diagram of a flexible sand removal device for the inner cavity of an aluminum alloy cylindrical shell according to an embodiment of the present invention, as shown below. Figures 1 to 4 As shown, in this embodiment, the lifting assembly 2 includes a lifting rotating frame 21, a slewing bearing 22, a sliding assembly 23, a first connecting plate 24, two sets of first guide wheel assemblies 25, a hydraulic cylinder 26, a second guide wheel assembly 27, and two sets of chains 28.

[0030] The lifting and rotating frame 21 is fixed to the base 1 via a slewing bearing 22. The sliding assembly 23 cooperates with the lifting and rotating frame 21, enabling it to slide up and down in the longitudinal direction. A first connecting plate 24 is fixed to the upper end of the lifting and rotating frame 21, and two sets of first guide wheel assemblies 25 are respectively fixed to both sides of the first connecting plate 24. One end of the hydraulic cylinder 26 is fixed to the slewing bearing 22, and the other end is connected to the second guide wheel assembly 27. One end of each chain 28 is connected to the first connecting plate 24, passes sequentially around the first guide wheel assembly 25 and the second guide wheel assembly 27, and the other end is connected to the sliding assembly 23. The extension and retraction of the hydraulic cylinder 26 drives the displacement of the second guide wheel assembly 27, which in turn drives the sliding assembly 23 via the chain 28 to achieve lifting and lowering motion.

[0031] The lifting and rotating frame 21 has a rotating handle 211 at its front end, and linear guide rails 212 are symmetrically installed on the front and rear walls of its frame. Two second connecting plates 213 are symmetrically connected to the end of the lifting and rotating frame 21 near the rotary support 22, and a positioning pin 214 is symmetrically installed on each second connecting plate 213. The positioning pin 214 cooperates with the fixing sleeve 12 on the base 1 to fix the rotational position of the lifting and rotating frame 21.

[0032] Figure 5 This is a partial example diagram of a lifting assembly according to an embodiment of the present invention, as shown below. Figures 1 to 2 to Figure 5 As shown, in this embodiment, the sliding assembly 23 includes two sets of third connecting plates 231, two sets of fourth connecting plates 232, two sets of boom beams 233, and two sets of second chain adjusting screws 234. The third connecting plates 231 are symmetrically arranged on both sides of the lifting and rotating frame 21, and their inner sides cooperate with the linear guide rail 212. The two sets of fourth connecting plates 232 are symmetrically connected to the two sets of third connecting plates 231 and are located on the other two sides of the lifting and rotating frame 21. The two sets of boom beams 233 are respectively arranged below each fourth connecting plate 232, and the second chain adjusting screws 234 are provided on the fourth connecting plate 232.

[0033] According to an optional example, in this embodiment, two through slots 241 are formed on the first connecting plate 24, and two first chain adjusting screws 242 are provided. Two sets of first guide wheel assemblies 25 are respectively fixed to the sides of the two through slots 241. The first guide wheel assembly 25 includes a pulley base 251 and a first pulley 252. The pulley base 251 is fixed on the first connecting plate 24, and the first pulley 252 is connected to the pulley base 251 through a built-in bearing and axle to achieve a rotatable function.

[0034] The second guide wheel assembly 27 includes a connecting fork 271, two second pulleys 272, a pin 273, and two bearings 274. Each end of the connecting fork 271 is connected to a second pulley 272 via the pin 273. Each second pulley 272 is mounted on the pin 273 via a bearing 274, thus enabling the second pulley 272 to rotate relative to the connecting fork 271. The hydraulic cylinder base 261 of the hydraulic cylinder 26 is hinged to the slewing bearing 22 and located inside the lifting and rotating frame 21. The piston rod 262 of the hydraulic cylinder 26 is fixedly connected to the connecting fork 271.

[0035] According to an optional example, in this embodiment, one end of each chain 28 is connected and fixed to a first chain adjusting screw 242, passes through the through slot 241 on the first connecting plate 24, and sequentially passes around the first pulley 252 on the first guide wheel assembly 25 and the second pulley 272 on the second guide wheel assembly 27. The other end is connected to the second chain adjusting screw 234 of the sliding assembly 23. The extension and retraction of the hydraulic cylinder 26 drives the chain 28 to pull the sliding assembly 23 to achieve lifting and lowering movement.

[0036] Figure 6 This is a partial cross-sectional view of a drive component according to an embodiment of the present invention. Figure 6 As shown, in this embodiment, the drive assembly 3 includes a hydraulic motor 31, a support frame 32, a bearing housing 33, and a coupling 34. The hydraulic motor 31 is mounted on the boom beam 233 via the support frame 32. Both ends of the bearing housing 33 are fixedly connected to the boom beam 233. The coupling 34 is located at the output end of the hydraulic motor 31 and is used to transmit torque to the linear sand cleaning assembly 4 and the curved sand cleaning assembly 5. The drive assembly 3 is powered by the hydraulic motor 31, and the support frame 32 and the bearing housing 33 together form a stable support structure.

[0037] Figure 7 This is an example diagram of the structure of a straight sand-cleaning assembly according to an embodiment of the present invention. Figure 8 This is a partial example diagram of a straight sand-removing assembly according to an embodiment of the present invention. Figure 9 This is a partial example diagram of a straight-line sand-cleaning assembly according to an embodiment of the present invention. Figures 7 to 9 As shown, in this embodiment, the linear sand-cleaning assembly 4 includes a first rotating shaft 41, multiple first movable buckles 42, and multiple first friction belts 43. The first rotating shaft 41 has four first grooves 411. The first movable buckles 42 are hinged within the first grooves 411 by fasteners. One first friction belt 43 is fixed to one first movable buckle 42 by fasteners. Two first friction belts are fixed to the lower end of each first groove 411 by fasteners. The upper end of the first rotating shaft 41 passes through a bearing seat 33 and is connected to the output end of a hydraulic motor 31 via a coupling 34, thereby realizing the rotation of the linear sand-cleaning assembly 4.

[0038] Figure 10 This is an example diagram of the structure of the curved sand-removing component according to an embodiment of the present invention. Figure 11 This is a partial example diagram of a curved sand-removing assembly according to an embodiment of the present invention. Figure 12 This is a partial example diagram of a curved sand-removing assembly according to an embodiment of the present invention, as shown below. Figures 10 to 12As shown, in this embodiment, the curved sand-removing assembly 5 includes a second rotating shaft 51, a second movable buckle 52, and a second friction belt 53. The second rotating shaft 51 has four second grooves 511. The second movable buckle 52 is hinged within the second grooves 511 by fasteners. The second friction belt 53 is fixed to the second movable buckle 52 by fasteners. Two second friction belts 53 are fixed to the lower end of each second groove 511 by fasteners. The upper end of the second rotating shaft 51 passes through a bearing seat 33 and is connected to the output end of a hydraulic motor 31 via a coupling 34, thereby realizing the rotation of the curved sand-removing assembly 5.

[0039] It should be noted that, in practical applications, the materials of the first rotating shaft 41 and the second rotating shaft 51, the first movable buckle 42 and the second movable buckle 52, and the first friction band 43 and the second friction band 53 in both the straight sand cleaning assembly 4 and the curved sand cleaning assembly 5 are consistent. The core difference between the two lies in the different length configurations of the first friction band 43 and the second friction band 53. All the first friction bands 43 in the straight sand cleaning assembly 4 adopt a uniform length, forming a cylindrical cleaning profile; while the second friction bands 53 in the curved sand cleaning assembly 5 adopt a gradually decreasing length arrangement along the axial direction of the rotating shaft, forming a profile that matches the curved cavity.

[0040] It should be noted that in practical applications, both the first friction belt 43 and the second friction belt 53 are made of high-strength nylon flat belts with nylon as the skeleton material. This material has characteristics such as high strength, high wear resistance, high temperature resistance, lightweight and flexible, not easily deformed, and excellent chemical corrosion resistance, and can withstand the frequent friction and impact during sand removal operations. Its lightweight characteristics help reduce rotational inertia, ensuring rapid response and adhesion to the cavity wall under centrifugal force. High wear resistance guarantees service life. High temperature resistance and chemical corrosion resistance are suitable for the environment of residual resin sand in casting.

[0041] Figure 13 This is an example diagram illustrating the working state of the linear sand-cleaning assembly according to an embodiment of the present invention. Figure 14 This is an example diagram illustrating the working state of the curved sand-removing component according to an embodiment of the present invention, as shown below. Figure 13 , Figure 14 As shown, in this embodiment, when the shaft rotates at high speed under the drive assembly 3, the movable buckle drives the friction belt to unfold outward from a stationary state under the action of centrifugal force until the outermost end of the friction belt abuts against the inner wall of the housing. The frictional force of the friction belt on the inner cavity of the housing increases with the increase of rotational speed, and the sand core is cleaned through continuous frictional impact. The movable buckle is arranged in a spiral to ensure that there are no dead corners in the cleaning. When encountering metal bosses, the friction belt can slide elastically over them to avoid damaging the casting.

[0042] Figure 15 This is a first partial example diagram of a power control assembly according to an embodiment of the present invention, as shown below. Figures 1 to 15As shown, in this embodiment, the power control component 6 includes a control cabinet 61, a motor 62, an oil tank 63, a control panel 64, a bracket 65, a speed control valve 66, and a manual directional valve 67. The manual directional valve 67 is mounted on the control panel 64, and the speed control valve 66 is mounted on the bracket 65. The motor 62 drives the hydraulic pump to draw oil from the oil tank 63. The speed of the hydraulic motor 31 can be adjusted by the speed control valve 66, and the forward and reverse rotation of the hydraulic motor 31 and the lifting and lowering movement of the hydraulic cylinder 26 can be controlled by the manual directional valve 67. The control panel 64 centrally arranges control handles to achieve precise control of the entire machine's movements.

[0043] The application principle of the flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell of the present invention is as follows: 1. Start the power control assembly 6 and operate the control handle on the control panel 64. Then, rotate the lifting and rotating frame 21 by turning the handle 211, so that it rotates to the positioning device 11 on the avoidance base 1, and locks the position by the cooperation of the positioning pin 214 and the fixing sleeve 12. Use a crane to lift the casting to be cleaned onto the positioning device 11 on the base 1 and fix it.

[0044] 2. Pull out the positioning pin 214, and rotate the lifting and rotating frame 21 90° by turning the handle 211, so that it drives the sliding assembly 23, drive assembly 3, straight sand cleaning assembly 4, and curved sand cleaning assembly 5 to be directly above the casting, and then reinsert the positioning pin 214 to lock it. Operate the manual reversing valve 67 to extend the piston rod 262 of the hydraulic cylinder 26. The hydraulic cylinder 26 pulls the second guide wheel assembly 27, and then drives the sliding assembly 23 to descend smoothly along the straight guide rail 212 by passing the chain 28 around the first pulley 252 and the second pulley 272. The descent of the sliding assembly 23 causes the drive assembly 3 installed on its boom beam 233 and the straight sand cleaning assembly 4 and curved sand cleaning assembly 5 connected to it to descend as well, until the sand cleaning assembly is completely in the predetermined cleaning position inside the casting cavity.

[0045] 3. Adjust the speed of the hydraulic motor 31 to the desired value using the speed control valve 66 on the control panel 64. Operate the manual reversing valve 67 to start the hydraulic motor 31. The hydraulic motor 31 drives the first shaft 41 of the linear sand-cleaning assembly 4 and the second shaft 51 of the curved sand-cleaning assembly 5 to rotate synchronously at high speed via the coupling 34. Under centrifugal force, the first movable buckle 42 and the second movable buckle 52 respectively drive the first friction band 43 and the second friction band 53 to unfold outward from a stationary state, tightly adhering to the inner wall of the casting. Specifically, the equal-length friction bands of the linear sand-cleaning assembly 4 form a cylindrical surface to clean the straight section of the inner cavity; the progressively decreasing length friction bands of the curved sand-cleaning assembly 5 form a contoured curved surface to clean the curved section of the inner cavity. Control the hydraulic motor 31 to alternate between forward and reverse rotation using the manual reversing valve 67 to ensure that all sides of the bosses and ribs in the inner cavity of the casting are thoroughly cleaned.

[0046] 4. After sand removal is complete, operate the manual directional valve 67 to stop the hydraulic motor 31 and control the piston rod 262 of the hydraulic cylinder 26 to retract. This, via the chain 28, pulls the sliding assembly 23, the linear sand removal assembly 4, and the curved sand removal assembly 5 upwards, completely detaching them from the casting's inner cavity. Then, operate the rotating handle 211 and the positioning pin 214 again to rotate the lifting and rotating frame 21 to avoid the work station. Use a crane to remove the cleaned casting and hoist the next casting to be cleaned. Repeat the above steps to achieve continuous cyclic operation.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A flexible sand-removing device for the inner cavity of an aluminum alloy cylindrical shell, characterized in that, The system includes a base (1), a lifting assembly (2), two sets of drive assemblies (3), a straight sand cleaning assembly (4), a curved sand cleaning assembly (5), and a power control assembly (6). The lifting assembly (2) is rotatably fixed on the base (1). The two sets of drive assemblies (3) are respectively located at both ends of the lifting assembly (2). The straight sand cleaning assembly (4) and the curved sand cleaning assembly (5) are respectively connected to the output end of one set of drive assemblies (3). The power control assembly (6) is connected to the drive assembly (3) and the lifting assembly (2) through pipes or lines. The lifting assembly (2) achieves station switching through rotational movement and drives the two sets of drive assemblies (3) and their connected straight sand cleaning assembly (4) and curved sand cleaning assembly (5) to enter or leave the inner cavity of the casting to be cleaned through lifting movement. The drive assembly (3) drives the straight sand cleaning assembly (4) and the curved sand cleaning assembly (5) to perform sand cleaning operations through rotational movement.

2. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 1, characterized in that, The base (1) includes two positioning devices (11) and four fixing sleeves (12). The two positioning devices (11) are symmetrically arranged on the base (1), and the four fixing sleeves (12) are arranged in a circular array along the lifting assembly (2) on the base (1).

3. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 1, characterized in that, The lifting assembly (2) includes a lifting rotating frame (21), a slewing bearing (22), and a first connecting plate (24). The lifting rotating frame (21) is mounted on the base (1) via the slewing bearing (22). A rotating handle (211) is provided at the front end of the lifting rotating frame (21). Linear guide rails (212) are symmetrically installed on the front and rear walls of the lifting rotating frame (21). Two second connecting plates (213) are symmetrically connected to one end near the slewing bearing (22). A positioning pin (214) is installed on each second connecting plate (213). The first connecting plate (24) is fixed to the upper end of the lifting rotating frame (21). Two through slots (241) are opened on the first connecting plate (24), and two first chain adjusting screws (242) are provided.

4. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 3, characterized in that, The lifting assembly (2) also includes a sliding assembly (23), which includes two sets of third connecting plates (231), two sets of fourth connecting plates (232), two sets of boom beams (233), and two sets of second chain adjusting screws (234). The two sets of third connecting plates (231) are symmetrically arranged on both sides of the lifting rotating frame (21), and their inner sides are slidably engaged with the linear guide rail (212). Each set of fourth connecting plates (232) is symmetrically connected to both ends of the two sets of third connecting plates (231) and located on the other two sides of the lifting rotating frame (21). Each set of boom beams (233) is arranged below a set of fourth connecting plates (232), and each set of second chain adjusting screws (234) is arranged on a set of fourth connecting plates (232).

5. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 4, characterized in that, The lifting assembly (2) further includes two sets of first guide wheel assemblies (25), a second guide wheel assembly (27), and two sets of chains (28). The first guide wheel assembly (25) includes a pulley base (251) and a first pulley (252). The pulley base (251) is fixed to the side of the through groove (241) of the first connecting plate (24). The first pulley (252) is mounted on the pulley base (251) by bearings. The second guide wheel assembly (27) includes a connecting wheel fork (271) and two second guide wheels. The system includes a pulley (272), a pin (273), and two sets of bearings (274). The second pulley (272) is mounted on both ends of the connecting wheel fork (271) via the bearings (274) and the pin (273). One end of the chain (28) is connected and fixed to the first chain adjusting screw (242), passes through the through groove (241), and then passes around the first pulley (252) and the second pulley (272) in sequence. The other end is connected to the second chain adjusting screw (234) on the fourth connecting plate (232).

6. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 5, characterized in that, The lifting assembly (2) also includes a hydraulic cylinder (26), which includes a hydraulic cylinder base (261) and a piston rod (262). The hydraulic cylinder base (261) is hinged to the slewing bearing (22) and located inside the lifting rotating frame (21). The piston rod (262) of the hydraulic cylinder (26) is fixedly connected to the connecting wheel fork (271) of the second guide wheel assembly (27).

7. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 4, characterized in that, The drive assembly (3) includes a hydraulic motor (31), a support frame (32), a bearing seat (33), and a coupling (34). The hydraulic motor (31) is fixed on the boom beam (233) by the support frame (32). The two ends of the bearing seat (33) are fixedly connected to the boom beam (233). The coupling (34) is located at the output end of the hydraulic motor (31).

8. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 7, characterized in that, The linear sand cleaning assembly (4) includes a first rotating shaft (41), multiple first movable buckles (42) and multiple first friction belts (43). The upper end of the first rotating shaft (41) passes through the bearing seat (33) and is connected to the output end of the hydraulic motor (31) through a coupling (34). The first rotating shaft (41) is provided with four first grooves (411). The first movable buckles (42) are hinged in the first grooves (411) by fasteners. The first friction belts (43) are fixed on the first movable buckles (42) by fasteners. The lower end of each first groove (411) is fixed with two first friction belts (43) by fasteners.

9. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 7, characterized in that, The curved sand-cleaning assembly (5) includes a second rotating shaft (51), multiple second movable buckles (52) and multiple second friction belts (53). The upper end of the second rotating shaft (51) passes through the bearing seat (33) and is connected to the output end of the hydraulic motor (31) through a coupling (34). The second rotating shaft (51) is provided with four second grooves (511). The second movable buckles (52) are hinged in the second grooves (511) by fasteners. The second friction belts (53) are fixed on the second movable buckles (52) by fasteners. The lower end of each second groove (511) is fixed with two second friction belts (53) by fasteners. The length of the second friction belts (53) decreases gradually from top to bottom along the axial direction of the second rotating shaft (51).

10. The flexible sand removal device for the inner cavity of the aluminum alloy cylindrical shell according to claim 1, characterized in that, The power control assembly (6) includes a control cabinet (61), an electric motor (62), an oil tank (63), a control panel (64), a bracket (65), a speed control valve (66), and a manual directional valve (67). The manual directional valve (67) is mounted on the control panel (64), the speed control valve (66) is mounted on the bracket (65), the electric motor (62) is connected to the hydraulic pump in the oil tank (63), the speed control valve (66) is connected to the hydraulic motor (31) through an oil circuit, and the manual directional valve (67) is connected to the hydraulic cylinder (26) through an oil circuit.

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