An auxiliary shakeout device for castings

Abstract

This utility model relates to the field of casting auxiliary sand removal technology, specifically a casting auxiliary sand removal device, including a base plate, a dustproof frame, a clamping assembly, a sand removal hole, and an impact assembly. The sand remover forms a universal joint structure with the first connecting frame through a rotating shaft, allowing it to swing freely in three-dimensional space. When the impact assembly is activated, the sand remover automatically adjusts its angle under the action of centrifugal force and inertia, impacting the deep cavity, inclined surface, curved surface, and other parts of the casting from all directions. A first spring connects the rotating shaft and the first connecting frame, providing flexible buffering. When the sand remover contacts a thin-walled casting, the spring is compressed to absorb the impact force, avoiding deformation caused by rigid collision. It is especially suitable for sand removal operations of thin-walled aerospace parts.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary sand removal technology for castings, specifically to an auxiliary sand removal device for castings. Background Technology

[0002] As is well known, a sand removal machine is a casting equipment that uses vibration and impact to separate the molding sand in the mold from the casting. The vibration sources of sand removal machines are divided into three categories: mechanical, electromagnetic, and pneumatic. Mechanical inertial sand removal machines are more widely used.

[0003] Traditional devices often employ single impact methods such as vibration at a fixed angle or air blowing. The impact direction, such as vertical vibration, fixed-angle air blowing, and the position of action, are entirely dependent on manual pre-setting. This cannot adapt to complex structures such as deep cavities, curved surfaces, and inclined surfaces of castings. For example, sand particles in the dead corners of the inner cavity of deep-hole castings and in the normal direction of curved surface castings often remain because the impact cannot cover them, requiring secondary manual cleaning. Thin-walled parts are prone to deformation due to the concentrated impact force at fixed positions, and sand particles remaining at irregularly shaped orifices further hinder automated production. Summary of the Invention

[0004] Technical problems to be solved To overcome the problem of the limited impact direction and position of existing casting auxiliary sand removal devices, this utility model provides a casting auxiliary sand removal device with adjustable impact direction and position.

[0005] Technical solution To achieve the above objectives, this utility model provides the following technical solution: a casting auxiliary sand removal device, comprising: Base plate; A dustproof frame, which is fixedly installed on the top of the base plate; A clamping assembly, which is mounted on the base plate; Sand discharge holes, wherein the sand discharge holes are formed on the base plate; and An impact assembly is installed on both sides of the top of the base plate. The impact assembly includes a fixed frame, which is slidably disposed on both sides of the base plate by an adjusting component. Sliding blocks are slidably disposed on the sides of the fixed frame, and a rotating shaft is rotatably disposed on the top of each sliding block. A first connecting frame is rotatably disposed on the rotating shaft, and a rotating rod is fixedly disposed on the first connecting frame. A sand remover is installed on the rotating rod, and a first spring is fixedly disposed on the rotating shaft. The first spring is fixedly disposed with the first connecting frame.

[0006] Preferably, the fixed frame is provided with a first sliding groove, a first slider is slidably disposed in the first sliding groove, a first screw is rotatably disposed in the first sliding groove, a second slider is slidably disposed in the first sliding groove, the second slider is threadedly connected to the first screw, and one end of the second slider is fixedly disposed with the sliding block.

[0007] Furthermore, the first slider has a sliding groove, one end of the second spring is fixedly disposed in the sliding groove, and a sliding plate is fixedly disposed on the side of the second slider, one end of the sliding plate is fixedly disposed with the other end of the second spring.

[0008] Furthermore, the top of the fixed frame is provided with a slot, and a limiting handle corresponding to the number of the second sliders is slidably disposed in the slot. A fixing nut is provided on the limiting handle by thread, one end of the limiting handle is threadedly connected to the top of the second slider, and the fixing nut is in contact with the top of the fixed frame.

[0009] In a further embodiment, a motor is fixedly installed on both sides of the top of the base plate, and a first pulley is fixedly installed on the output shaft of the motor and one end of the first screw, and a first belt is connected between the first pulleys for transmission.

[0010] Based on the aforementioned scheme, support plates are fixedly installed on both sides of the top of the base plate. A second sliding groove is opened on the support plate. A sliding column is fixedly installed in the second sliding groove. A third spring is fixedly installed in the second sliding groove. The third spring is sleeved on the sliding column. A third slider is slidably installed on the sliding column. A second pulley is rotatably installed on the side of the third slider. The second pulley is connected to the first belt for transmission.

[0011] Furthermore, based on the aforementioned solution, the adjustment component includes a third slide groove, which is formed on both sides of the top of the base plate. A fourth slider is slidably disposed in the third slide groove, and the fourth slider is fixedly disposed with the fixed frame. A threaded handle is threadedly disposed in the third slide groove, and one end of the threaded handle is rotatably disposed with the fourth slider.

[0012] Furthermore, based on the aforementioned solution, the clamping assembly includes a mounting plate, which is fixedly disposed on both sides of the top of the base plate. A fixing post is fixedly disposed between the mounting plates. A first clamping block is fixedly disposed at one end of the fixing post, and a cylinder is slidably disposed at the other end of the fixing post. Both the first clamping block and the cylinder are located directly above the sand drop hole.

[0013] Beneficial effects This casting auxiliary sand removal device has a sand remover that forms a universal joint structure with the first connecting frame through a rotating shaft, allowing it to swing freely in three-dimensional space. When the impact component is activated, the sand remover automatically adjusts its angle under the action of centrifugal force and inertia, impacting the deep cavity, inclined surface, curved surface and other parts of the casting from all directions. The first spring connects the rotating shaft and the first connecting frame, providing flexible buffer. When the sand remover contacts the thin-walled casting, the spring is compressed to absorb the impact force, avoiding deformation caused by rigid collision. It is especially suitable for sand removal operations of thin-walled parts in aerospace. Attached Figure Description

[0014] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the clamping assembly of this utility model; Figure 3 This is a schematic diagram of the groove structure of this utility model; Figure 4 This is a schematic diagram of the structure of the first screw of this utility model; Figure 5 This utility model Figure 4 A magnified schematic diagram of the local structure at point A; Figure 6 This is a schematic diagram of the structure of the support plate of this utility model; Figure 7 This is a schematic diagram of the impact assembly of this utility model; Figure 8 This utility model Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0015] In the diagram: 1. Base plate; 2. Dustproof frame; 3. Clamping assembly; 4. Sand drop hole; 5. Impact assembly; 6. Fixing frame; 7. Sliding block; 8. Rotating shaft; 9. First connecting frame; 10. Rotating rod; 11. Sand dropper; 12. First spring; 13. First slide groove; 14. First slider; 15. First screw; 16. Second slider; 17. Sliding groove; 18. Second spring; 19. Sliding plate; 20. Groove; 21. Limit handle; 22. Fixing nut; 23. Motor; 24. First pulley; 25. First belt; 26. Support plate; 27. Second slide groove; 28. Sliding column; 29. ​​Third spring; 30. Third slider; 31. Second pulley; 32. Third slide groove; 33. Fourth slider; 34. Threaded handle; 35. Mounting plate; 36. Fixing column; 37. First clamping block; 38. Cylinder. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] See Figures 1-8 A casting auxiliary sand removal device, through the three-dimensional adjustable structure of the impact component 5 and the flexible fixation of the clamping component 3, achieves all-round sand removal treatment for complex casting structures. The core solution is as follows: the fixing frame 6 of the impact component 5 slides horizontally on the base plate 1 through the adjustment component, and with the vertical lifting of the sliding block 7 and the universal swing of the rotating shaft 8, the sand remover 11 can perform multi-angle impact on deep cavities, curved surfaces, inclined surfaces and other parts of the casting. The clamping component 3 adopts the method of cylinder 38 and fixing column 36 to adaptively fix castings of different sizes. Combined with the sealing design of the dustproof frame 2, it reduces dust pollution while ensuring sand removal efficiency. This device solves the problem of traditional sand removal devices having a single impact direction and being unable to adapt to complex casting structures, significantly improves the degree of automation of sand removal, reduces the cost of secondary manual cleaning, and is especially suitable for high-precision casting sand removal operations in aerospace, automobile manufacturing and other fields.

[0018] First, refer to Figure 1 In this embodiment, the base plate 1 is welded from Q235-B steel plate and has a rectangular structure. Sand drop holes 4 are opened on the top surface, and shock-absorbing pads are set at the four corners of the bottom to reduce the vibration transmission during the operation of the device. The top edge of the base plate 1 is vertically fixed with a dustproof frame 2. The dustproof frame 2 is a semi-enclosed structure composed of an aluminum alloy frame and a transparent PVC curtain. The bottom of the curtain is sealed to the base plate 1 to prevent dust from overflowing during the sand drop process. The base plate 1 has embedded reinforcing ribs to improve the load-bearing capacity and ensure the structural stability of the clamping assembly 3 and the impact assembly 5 during operation. The dustproof frame 2 has an observation window on the side to facilitate the operator to monitor the sand drop status in real time. At the same time, an inspection door is reserved for convenient equipment maintenance.

[0019] Then, refer to Figure 2In this embodiment, the clamping assembly 3 includes a mounting plate 35, a fixing post 36, a first clamping block 37, and a cylinder 38. The mounting plate 35 is symmetrically fixed on both sides of the top of the base plate 1 and connected to it by the fixing post 36. The first clamping block 37 is welded to one end of the fixing post 36, and the cylinder 38 is slidably sleeved on the other end. The piston rod of the cylinder 38 faces the first clamping block 37 and can extend and retract along the axis of the fixing post 36 to form a clamping structure with the first clamping block 37. The surface of the clamping block is covered with a rubber buffer layer to prevent damage to the surface of the casting during clamping. For castings of different sizes, the clamping distance can be changed by adjusting the extension and retraction of the cylinder 38. The outer side of the fixing post 36 is engraved with scale lines to help the operator accurately control the clamping position and ensure that the center of the casting is aligned with the sand drop hole 4, so that the sand particles can fall smoothly.

[0020] Secondly, see Figure 7 and Figure 8 In this embodiment, the impact component 5 is the core of multi-directional sand dropping. It consists of a fixed frame 6, an adjustment component, a sliding block 7, a rotating shaft 8, a first connecting frame 9, a rotating rod 10, a sand dropping device 11, and a spring. The fixed frame 6 is slidably connected to the third slide groove 32 of the base plate 1 through the fourth slider 33 at the bottom. Rotating the threaded handle 34 can drive the fourth slider 33 to move horizontally along the slide groove, adjusting the lateral distance between the fixed frame 6 and the casting to adapt to the impact position requirements of castings of different sizes. The fixed frame 6 has a first slide groove 13 on its side, and a first screw 15 is rotatably set inside. The motor 23 drives the first screw 15 to rotate through the first pulley 24 and the belt, driving the second slider 16 to slide up and down along the screw. The second slider 16 is connected to the first slider 14 through the sliding plate 19. The second spring 18 on the first slider 14 provides a buffer for the sliding plate 19 to avoid rigid impact during lifting and lowering.

[0021] The top of the sliding block 7 is fitted with a rotating shaft 8 via a bearing. A first connecting frame 9 is fitted onto the shaft. A first spring 12 is provided between the first connecting frame 9 and the rotating shaft 8 to form an elastic hinge structure. The rotating rod 10 is fixed to the first connecting frame 9, and a sand remover 11 (such as a pneumatic hammer or vibratory head) is installed at its end. When the sand remover 11 contacts the surface of the casting, the first spring 12 is compressed, allowing the rotating shaft 8 to swing ±30° in three-dimensional space. This allows the sand remover 11 to automatically conform to the curved surface of the casting, while buffering the impact force and preventing deformation of thin-walled parts.

[0022] Again, see Figure 2 and Figure 6In this embodiment, the motor 23 at the top of the base plate 1 drives the first screw 15 to rotate through the first pulley 24. The third spring 29 and the third slider 30 are installed in the second groove 27 on the support plate 26. The second pulley 31 on the third slider 30 is connected to the first belt 25. The third spring 29 ensures that the belt is always taut and avoids slippage. The limiting handle 21 at the top of the fixed frame 6 passes through the slot 20 and is threadedly connected to the second slider 16. Rotating the fixing nut 22 can lock the position of the second slider 16, preventing the sliding block 7 from moving accidentally during the sand falling process and ensuring the stability of the impact position.

[0023] In addition, see Figure 2 In this embodiment, the sand removal process for deep cavity castings (such as engine cylinder blocks) is as follows: place the cylinder block between the clamping components 3, start the cylinder 38 to clamp the casting, and ensure that the deep cavity opening is vertically upward.

[0024] Rotate the threaded handle 34 to adjust the fixed frame 6 to be directly above the deep cavity, and rotate the first screw 15 to lower the sand dropper 11 to the deep cavity inlet.

[0025] When the sand remover 11 is started, the rotating shaft 8 swings automatically in the deep cavity. The sand remover 11 impacts the cavity wall at multiple angles, and the sand particles are discharged through the sand removal hole 4. Due to the flexible support of the first spring 12, the sand remover 11 can penetrate deep into the bottom of the deep cavity, solving the problem that traditional vertical impact cannot cover dead corners, and improving the sand removal efficiency by 40%.

[0026] Sand removal control for thin-walled castings (such as aerospace aluminum alloy housings): Adjust the clamping force of cylinder 38 to the minimum value to avoid housing deformation, and at the same time lock the height of sliding block 7 through limit handle 21 to keep the sand removal device 11 at a distance from the housing surface.

[0027] When the sand remover 11 is started to run at low speed, the first spring 12 is compressed when the sand remover 11 contacts the shell, which reduces the impact force by 50% and the vibration frequency is automatically adjusted, which effectively removes sand particles and prevents the shell from cracking due to high-frequency impact.

[0028] After the sand removal is completed, the amount of sand particles remaining on the shell surface is less than 5%, and no secondary manual cleaning is required.

[0029] The angle of sand removal for irregularly shaped hole castings (such as automotive gearbox housings) is adaptive.

[0030] Adjust the sand remover 11 to the side of the irregular hole by using the threaded handle 34 and the first screw 15, and swing the rotating shaft 8 25° so that the axis of the sand remover 11 is aligned with the normal direction of the hole.

[0031] The sand remover 11 impacts the sand particles inside the hole at a 45° angle. Combined with the negative pressure dust collection device inside the dustproof frame 2, it removes more than 90% of the sand particles inside the hole, solving the problem of sand particles remaining at the hole opening caused by traditional fixed-angle impact.

[0032] Finally, see Figure 6 In this embodiment, the driving method is extended to hydraulic drive: the motor 23 and belt drive are replaced by hydraulic cylinders, and the lifting speed of the sliding block 7 is precisely controlled by a proportional valve, which is suitable for precision castings that require extremely slow impact speed.

[0033] Servo motor 23 + encoder: The addition of servo motor 23 and position encoder enables numerical control adjustment of the three-dimensional position of the sand dropper 11. With the help of PLC program to preset sand drop paths for different castings, it is suitable for automated production lines.

[0034] Upgraded materials and protection: Wear-resistant sand remover 11: The head of sand remover 11 is made of tungsten carbide alloy overlay welding, with a surface hardness of HRC65, extending its service life by 3 times, and is suitable for removing high-hardness molding sand.

[0035] Explosion-proof and dustproof design: The interior of the dustproof frame 2 is coated with an anti-static coating and equipped with an explosion-proof vacuum cleaner, which is suitable for removing sand from flammable metal castings such as magnesium alloys and prevents the risk of dust explosion.

[0036] (Structural modular improvement, multi-section fixed frame 6: The fixed frame 6 is divided into upper and lower sections, which are connected by flanges. The upper section can be disassembled according to the height of the casting, and the device can be converted into a low-profile sand removal device to adapt to different workshop space requirements.)

[0037] Quick-change sand removal device 11: The rotating rod 10 and the sand removal device 11 are connected by a quick-release clamp, which can replace different types of sand removal heads (such as vibrating head, air hammer head, sandblasting head, etc.) to meet diverse sand removal process requirements.

[0038] Working principle: When using this casting auxiliary sand removal device, first place the casting directly above the sand removal hole 4 on the base plate 1, then start the cylinder 38 to slide along the fixed column 36 and cooperate with the first clamping block 37 to clamp the casting (applicable to castings of different sizes).

[0039] Rotate the threaded handle 34, which drives the fourth slider 33 and the fixed frame 6 to move laterally through the third slide groove 32, so that the sand dropper 11 is aligned with the part of the casting to be sanded (such as a deep cavity or curved surface). Rotate the limit handle 21, which drives the second slider 16 to slide up and down in the first slide groove 13 through the threaded connection, and adjust the vertical height of the sand dropper 11 to ensure accurate impact position.

[0040] Rotating the limit handle 21 causes the second slider 16 to slide up and down in the first groove 13 via a threaded connection, adjusting the vertical height of the sand dropper 11 to ensure accurate impact positioning. The compression of the second spring 18 in the sliding groove 17 can be adjusted by the sliding plate 19 to control the impact buffering force of the sand dropper 11 (for thin-walled parts, the compression of the second spring 18 is increased to reduce the force). The third spring 29 cooperates with the third slider 30 to adjust the stability of the first belt 25 transmission through the tension of the second pulley 31, indirectly affecting the impact frequency of the sand dropper 11 (for example, high-frequency impact is suitable for complex structure castings).

[0041] When the motor 23 is running, it drives the first screw 15 to rotate through the first pulley 24. The second slider 16 moves back and forth, and the sand dropper 11 moves horizontally back and forth with the sliding block 7. At the same time, it is subjected to centrifugal force and inertia and swings around the rotating shaft 8 to impact the surface of the casting in multiple directions (such as vertical vibration + horizontal swing). The dustproof frame 2 prevents sand particles from splashing, and the sand drop hole 4 collects the fallen molding sand for easy subsequent cleaning or recycling.

[0042] During the swinging process, the sand dropper 11 automatically conforms to the normal direction of the deep cavity or curved surface of the casting, impacting and covering dead corner areas (such as sand particles on the inner wall of deep holes). There is no need to manually adjust the angle. The first spring 12 is compressed when the sand dropper 11 contacts the thin-walled casting, absorbing excess impact force and preventing the casting from deforming (such as sand drop of thin-walled parts in aerospace).

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A casting auxiliary sand removal device, characterized in that, include: Base plate (1); A dustproof frame (2) is fixedly installed on the top of the base plate (1); A clamping assembly (3) is mounted on the base plate (1); Sand drain hole (4), the sand drain hole (4) is formed on the base plate (1); and Impact assembly (5), the impact assembly (5) is installed on the top two sides of the base plate (1), the impact assembly (5) includes a fixed frame (6), the fixed frame (6) is slidably disposed on both sides of the base plate (1) by adjusting the assembly, the fixed frame (6) is slidably disposed on the side of the fixed frame (6) and the two sides of the sliding block (7) are rotatably disposed on a rotating shaft (8), the rotating shaft (8) is rotatably disposed on a first connecting frame (9), the first connecting frame (9) is fixedly disposed on a rotating rod (10), the rotating rod (10) is mounted on a sand dropper (11), the rotating shaft (8) is fixedly disposed on a first spring (12), the first spring (12) is fixedly disposed on the first connecting frame (9).

2. The casting auxiliary sand removal device according to claim 1, characterized in that, The fixed frame (6) is provided with a first slide groove (13), a first slider (14) is slidably arranged in the first slide groove (13), a first screw (15) is rotatably arranged in the first slide groove (13), a second slider (16) is slidably arranged in the first slide groove (13), the second slider (16) is connected to the first screw (15) by a thread, and one end of the second slider (16) is fixedly arranged with the sliding block (7).

3. The casting auxiliary sand removal device according to claim 2, characterized in that, The first slider (14) has a sliding groove (17) and a second spring (18) is fixedly installed in the sliding groove (17). A sliding plate (19) is fixedly installed on the side of the second slider (16) and a sliding plate (19) is fixedly installed at one end to the other end of the second spring (18).

4. The casting auxiliary sand removal device according to claim 3, characterized in that, The top of the fixed frame (6) is provided with a slot (20), and a limit handle (21) corresponding to the number of the second sliders (16) is slidably arranged in the slot (20). A fixing nut (22) is threaded on the limit handle (21), and one end of the limit handle (21) is threadedly connected to the top of the second slider (16). The fixing nut (22) is in contact with the top of the fixed frame (6).

5. The casting auxiliary sand removal device according to claim 4, characterized in that, Motors (23) are fixedly installed on both sides of the top of the base plate (1). The output shaft of the motor (23) and one end of the first screw (15) are both fixedly provided with first pulleys (24). A first belt (25) is provided between the first pulleys (24).

6. The casting auxiliary sand removal device according to claim 5, characterized in that, Support plates (26) are fixedly installed on both sides of the top of the base plate (1). A second slide groove (27) is provided on the support plate (26). A sliding column (28) is fixedly installed in the second slide groove (27). A third spring (29) is fixedly installed in the second slide groove (27). The third spring (29) is sleeved on the sliding column (28). A third slider (30) is slidably installed on the sliding column (28). A second pulley (31) is rotatably installed on the side of the third slider (30). The second pulley (31) is connected to the first belt (25) for transmission.

7. The casting auxiliary sand removal device according to claim 6, characterized in that, The adjustment assembly includes a third slide groove (32), which is opened on both sides of the top of the base plate (1). A fourth slider (33) is slidably disposed in the third slide groove (32). The fourth slider (33) is fixedly disposed with the fixed frame (6). A threaded handle (34) is threadedly disposed in the third slide groove (32). One end of the threaded handle (34) is rotatably disposed with the fourth slider (33).

8. The casting auxiliary sand removal device according to claim 7, characterized in that, The clamping assembly (3) includes a mounting plate (35), which is fixedly disposed on both sides of the top of the base plate (1). A fixing post (36) is fixedly disposed between the mounting plates (35). A first clamping block (37) is fixedly disposed at one end of the fixing post (36), and a cylinder (38) is slidably disposed at the other end of the fixing post (36). The first clamping block (37) and the cylinder (38) are both located directly above the sand drop hole (4).

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