A sand core hanging wire device and process method

Abstract

The application discloses a sand core hanging wire device, which comprises a left support and a right support, wherein a fixing frame is rotationally connected to the side wall of the right support, an adjusting groove is formed in the side wall of the fixing frame, and a double-end threaded rod is rotationally connected in the adjusting groove; the application also discloses a sand core hanging wire process method of the sand core hanging wire device, which comprises the following process steps: S1, designing and manufacturing a core box mold according to a design scheme of a sand core; S2, hanging a wire; S3, manufacturing a core; S4, placing a core box; S5, closing a box; S6, cleaning sand and cutting; the application can clamp and fix the core box, and the L-shaped plates on the upper side and the lower side can support the upper end face and the lower end face of the core box; when the fixing frame drives the core box to overturn, the L-shaped plates can still effectively fix the core box, so that the core box is prevented from falling off.

Description

Technical Field

[0001] This invention relates to the field of sand casting production technology, and in particular to a device and process for attaching sand cores with suspending wires. Background Technology

[0002] In existing casting processes, larger sand cores from sand casting require the use of lifting wires during mold removal and hoisting, while lifting devices are used to lift the sand mold or core box.

[0003] Most current casting processes utilize clamping methods for lifting, such as the sand core lifting device disclosed in patent publication number "CN105035941A". In this device, the clamping force is provided by the friction between the inner ends of both sides and the sand mold. However, the sand mold often needs to be rotated during lifting to facilitate operations such as mold assembly, cleaning, and adhesive application. Therefore, relying solely on friction for clamping and fixing poses a risk of slippage during rotation. In view of this, this application proposes a sand core lifting wire device and process method. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device and process for attaching sand cores and suspending wires.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for attaching a sand core suspension wire includes a left support and a right support. A fixed frame is rotatably connected to the side wall of the right support. An adjustment groove is provided on the side wall of the fixed frame. A double-ended threaded rod is rotatably connected in the adjustment groove. A height-limiting nut is threaded onto each of the two threaded sections of the double-ended threaded rod. A height-limiting plate is fixedly connected to the side wall of the adjacent height-limiting nut. A drive box is fixedly connected to the side wall of the height-limiting plate. A locking screw is rotatably connected in the drive box. A locking nut is slidably connected in the drive box. An L-shaped plate is fixedly connected to the locking nut via a connecting rod. A storage groove is provided on the side wall of the height-limiting plate. The L-shaped plate is slidably connected in the storage groove. A rotating wheel is fixedly connected to the locking screw.

[0007] Preferably, a rotating shaft is fixedly connected to the side wall of the fixing frame, and the rotating shaft is rotatably connected to the side wall of the left bracket.

[0008] Preferably, the side wall of the drive box is provided with an air supply groove, a piston plate is slidably connected in the air supply groove, and the piston plate is connected to the top of the air supply groove by a first spring. The drive box is equipped with a one-way air inlet pipe and a one-way air outlet pipe that communicate with the inside of the air supply groove, and the piston plate is pushed to move by a pushing mechanism.

[0009] Preferably, the pushing mechanism includes an incomplete gear and a first rack. The incomplete gear is fixedly connected to a locking screw, one end of the first rack is fixedly connected to a piston plate, and the other end of the first rack extends into the drive box and meshes with the incomplete gear.

[0010] Preferably, the side wall of the left bracket is provided with a transmission groove, a transmission gear is rotatably connected in the transmission groove, and the transmission gear is connected to the rotating shaft through a one-way bearing. A second rack that meshes with the transmission gear is slidably connected in the transmission groove, and the second rack is connected to the top of the transmission groove through a third spring.

[0011] Preferably, the side wall of the left bracket is fixedly connected with a plurality of limiting sleeves, the side wall of the fixing frame is provided with a limiting groove, a limiting post is slidably connected in the limiting groove, the limiting post is connected to the inner wall of the limiting groove by a second spring, and the limiting post extends into the adjacent limiting sleeve.

[0012] This invention also discloses a process method for attaching sand cores and suspending wires in a sand core suspension device, comprising the following process steps:

[0013] S1. Based on the sand core design scheme, design and manufacture the core box mold, mark the core box mold and clean it, and send it for dimensional inspection. It is required that the core box mold can be easily and without dead corners for sand planting and that the mold removal is smooth, so as to meet the requirements of the casting process drawing.

[0014] S2. Attach the connecting wire. Select an iron wire of appropriate length and diameter ≥5mm as the connecting wire. Insert one end of the connecting wire into the lifting ring on the core box and wrap it to fix it.

[0015] S3. Core making: Fill the core box with the mixed core sand, making sure to compact it evenly. After the core box is full, use a φ5-φ10 air hole needle to make 2-3 air holes on the seed sand surface within a range of 200mm×200mm.

[0016] S4. Place the core box into the lifting device. By turning the double-ended threaded rod, the height limit plates on the upper and lower sides can fix the core boxes at different heights. Then, rotate the wheel to drive the locking screw to rotate, so as to lock the core box in the lifting device.

[0017] S5. The upper and lower boxes are joined together to form a complete cavity. Then, smelting and casting are carried out. Molten steel is smelted in a furnace and poured into the cavity.

[0018] S6. After sand removal and cutting, and solidification and heat preservation, open the box, remove sand, and cut the riser. Take care to avoid bumps and cutting the material. Proceed to the subsequent grinding process, including heat treatment and non-destructive testing.

[0019] 1. By setting up a drive box, locking screw, locking nut and L-shaped plate, when the height limit plate is on the upper and lower sides of the core box, the locking screw can be rotated to drive the locking nut to move. In this way, the L-shaped plate can be fixed on both sides of the core box, which can not only clamp and fix the core box, but also support the upper and lower end faces of the core box. In this way, when the fixing frame drives the core box to flip, the L-shaped plate can still effectively fix the core box and prevent the core box from falling off.

[0020] 2. By setting up components such as a second rack, a transmission gear, and a one-way bearing, the transmission gear can be rotated continuously by repeatedly pulling the second rack. This can drive the rotating shaft and the fixed frame to rotate by a certain angle, which facilitates cleaning, applying adhesive, and assembling the box.

[0021] 3. By setting limit sleeves, limit posts and limit grooves, after the core box is rotated by the fixed frame at a certain angle, the limit post can be inserted into the limit sleeve at the corresponding position, so that the whole device can be in a stable fixed state. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a sand core suspension wire device according to the present invention;

[0023] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0024] Figure 3 I Figure 2 Enlarged schematic diagram of the structure at point B in the diagram;

[0025] Figure 4 This is a side view of the left bracket, limiting sleeve, second rack, and lifting ring in this invention.

[0026] Figure 5 This is a side view of the incomplete gear and the first rack in this invention.

[0027] Figure 6 This is a schematic diagram of the structure of the left bracket, lifting ring, rotating shaft, limiting sleeve, and various components in the transmission groove of the present invention.

[0028] Figure 7 This is a schematic flowchart of the process for attaching sand cores and suspending wires proposed in this invention.

[0029] In the diagram: 1. Left bracket, 2. Right bracket, 3. Lifting ring, 4. Lifting thread, 5. Core box, 6. Fixing frame, 7. Height adjustment groove, 8. Double-ended threaded rod, 9. Height limiting nut, 10. Height limiting plate, 11. Storage groove, 12. L-shaped plate, 13. Drive box, 14. Locking screw, 15. Locking nut, 16. Incomplete gear, 17. First rack, 18. Rotating wheel, 19. Piston plate, 20. First spring, 21. Air supply groove, 22. One-way air inlet pipe, 23. One-way air outlet pipe, 24. Limiting groove, 25. Second spring, 26. Limiting post, 27. Limiting sleeve, 28. Transmission groove, 29. Second rack, 30. Third spring, 31. One-way bearing, 32. Rotating shaft, 33. Transmission gear, 34. Connecting rod. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1-6 A device for attaching a sand core suspension wire includes a left support 1 and a right support 2. A fixed frame 6 is rotatably connected to the side wall of the right support 2. An adjustment groove 7 is provided on the side wall of the fixed frame 6. A double-ended threaded rod 8 is rotatably connected in the adjustment groove 7. A height limiting nut 9 is threadedly connected to each of the two threaded sections of the double-ended threaded rod 8. A height limiting plate 10 is fixedly connected to the side wall of the adjacent height limiting nut 9. A drive box 13 is fixedly connected to the side wall of the height limiting plate 10. A locking screw 14 is rotatably connected in the drive box 13. A locking nut 15 is slidably connected in the drive box 13. An L-shaped plate 12 is fixedly connected to the locking nut 15 through a connecting rod 34. A storage groove 11 is provided on the side wall of the height limiting plate 10. The L-shaped plate 12 is slidably connected in the storage groove 11. A rotating wheel 18 is fixedly connected to the locking screw 14.

[0032] A rotating shaft 32 is fixedly connected to the side wall of the fixed frame 6, and the rotating shaft 32 is rotatably connected to the side wall of the left bracket 1. An air delivery groove 21 is provided on the side wall of the drive box 13. A piston plate 19 is slidably connected within the air delivery groove 21, and the piston plate 19 is connected to the top of the air delivery groove 21 via a first spring 20. A one-way air inlet pipe 22 and a one-way air outlet pipe 23, which communicate with each other inside the air delivery groove 21, are installed on the drive box 13. The piston plate 19 is moved by a pushing mechanism. Specifically, a one-way air inlet valve is installed in the one-way air inlet pipe 22, which only allows air to enter the air delivery groove 21 from the one-way air inlet pipe 22, while a one-way air outlet valve is installed in the one-way air outlet pipe 23, which only allows air to flow from the air delivery groove 21 to the one-way air outlet pipe 23.

[0033] The driving mechanism includes an incomplete gear 16 and a first rack 17. The incomplete gear 16 is fixedly connected to the locking screw 14. One end of the first rack 17 is fixedly connected to the piston plate 19, and the other end of the first rack 17 extends into the drive box 13 and meshes with the incomplete gear 16.

[0034] A transmission groove 28 is provided on the side wall of the left bracket 1. A transmission gear 33 is rotatably connected in the transmission groove 28, and the transmission gear 33 is connected to the rotating shaft 32 through a one-way bearing 31. A second rack 29, which meshes with the transmission gear 33, is slidably connected in the transmission groove 28. The second rack 29 is connected to the top of the transmission groove 28 through a third spring 30. Specifically, the inner ring of the one-way bearing 31 is fixedly connected to the rotating shaft 32, while the outer ring of the one-way bearing 31 is fixedly connected to the transmission gear 33. Due to the one-way torque transmission characteristic of the one-way bearing 31, when the transmission gear 33 rotates in the forward direction, it can drive the rotating shaft 32 to rotate in the forward direction through the one-way bearing 31. However, when the transmission gear 33 rotates in the reverse direction, it cannot drive the rotating shaft 32 to rotate through the one-way bearing 31.

[0035] Multiple limiting sleeves 27 are fixedly connected to the side wall of the left bracket 1. A limiting groove 24 is opened on the side wall of the fixing frame 6. A limiting post 26 is slidably connected in the limiting groove 24. The limiting post 26 is connected to the inner wall of the limiting groove 24 by a second spring 25, and the limiting post 26 extends into the adjacent limiting sleeve 27. It should be noted that, due to the limitation of the number of teeth of the second rack 29 and the transmission gear 33, the rotation angle of the transmission gear 33 caused by the second rack 29 is a fixed value each time. That is, each time the second rack 29 is pulled, the transmission gear 33 will rotate by a certain angle. Therefore, the rotation angle of the shaft 32 and the fixing frame 6 is also a fixed value each time. So no matter how the fixing frame 6 is rotated to each angle position, there is always a limiting sleeve 27 corresponding to the position of the limiting groove 24. At this time, the limiting post 26 in the limiting groove 24 is inserted into the limiting sleeve 27, so that the angle of the fixing frame 6 can always be fixed.

[0036] Reference Figure 7 The present invention also discloses a process method for attaching sand core suspension wires to a sand core suspension wire device, comprising the following process steps:

[0037] S1. Based on the sand core design scheme, design and manufacture the core box mold, mark the core box mold and clean it, and send it for dimensional inspection. It is required that the core box mold can be easily and without dead corners for sand planting and that the mold removal is smooth, so as to meet the requirements of the casting process drawing.

[0038] S2. Attach the connecting wire. Select an iron wire of appropriate length and diameter ≥5mm as the connecting wire 4. Insert one end of the connecting wire 4 into the lifting ring 3 on the core box and wrap it to fix it.

[0039] S3. Core making: Fill the core box 5 with the mixed core sand, and make sure to compact it evenly. After the core box 5 is filled, use φ5-φ10 air hole needles to make 2-3 air holes in the seed sand surface within a range of 200mm×200mm.

[0040] S4. Place the core box 5 into the lifting device. By turning the double-ended threaded rod 8, the upper and lower height limit plates 10 can fix the core boxes 5 at different heights. Then, rotate the rotating wheel 18 to drive the locking screw 14 to rotate, so as to lock the core box 5 in the lifting device.

[0041] S5. The upper and lower boxes are joined together to form a complete cavity. Then, smelting and casting are carried out. Molten steel is smelted in a furnace and poured into the cavity.

[0042] S6. After solidification and heat preservation, open the box, clean the sand and cut the riser. Take care to avoid bumps and cutting the material. Proceed to the subsequent grinding process, including heat treatment and non-destructive testing.

[0043] In this invention, the specific step S4 process is as follows: According to the height of the core box 5, the double-headed threaded rod 8 can be rotated, and the two height limiting nuts 9 can drive the upper and lower height limiting plates 10 to move, so that the upper and lower end faces of the upper and lower height limiting plates 10 match the upper and lower end faces of the core box 5. Then, each rotating wheel 18 is turned to drive the locking screw 14 to move, so that the locking nut 15 in the drive box 13 can move. Then the locking nut 15 can push the L-shaped plate 12 to one side of the core box 5 through the connecting rod 34. Then the L-shaped plates 12 on both sides will clamp and fix the core box 5. At the same time, the upper and lower end faces of the upper and lower L-shaped plates 12 can also effectively and stably support the core box 5. In this way, even if the fixing frame 6 drives the core box 5 to flip, the L-shaped plate 12 can prevent the core box 5 from falling off.

[0044] When it is necessary to close the box, the rotating wheel 18 is rotated in the opposite direction and the locking screw 14 is rotated. This allows the locking nut 15 to move back. The locking nut 15 will pull the L-shaped plate 12 into the storage groove 11 through the connecting rod 34. Then the L-shaped plate 12 no longer fixes the core box 5, and the core box 5 can be closed with another core box 5.

[0045] It is also worth mentioning that when the rotating wheel 18 is rotated, it will also drive the incomplete gear 16 to rotate continuously, as shown in the reference. Figure 6The incomplete gear 16 will intermittently mesh with the first rack 17. Each time the incomplete gear 16 meshes with the first rack 17, it will push the first rack 17 to move. The first rack 17 can push the piston plate 19 to move. When the incomplete gear 16 disengages from the first rack 17, the first spring 20 pulls the piston plate 19 back to its original position. Therefore, the piston plate 19 will move up and down in the air delivery groove 21. When the piston plate 19 moves down, it can draw air into the air delivery groove 21 from the one-way air inlet pipe 22. When the piston plate 19 moves up, it can blow the drawn-in air to the upper and lower end faces of the core box 5 from the one-way air outlet pipe 23. The airflow can clean the area where the L-shaped plate 12 is to be fixed, preventing sand mold debris and impurities from adhering to the clamping and fixing area of ​​the core box 5. This allows the L-shaped plate 12 to fully contact the surface of the core box 5, thereby improving the stability of the L-shaped plate 12 in clamping and fixing the core box 5.

[0046] Furthermore, moving the limiting post 26 back into the limiting groove 24 can release the rotation restriction of the fixing frame 6. The second rack 29 can then be pulled repeatedly, causing it to move up and down under the action of the third spring 30. This drives the transmission gear 33 to rotate back and forth. When the transmission gear 33 rotates in the forward direction, it can drive the rotating shaft 32 and the fixed frame 6 to rotate through the one-way bearing 31. However, when the transmission gear 33 rotates in the reverse direction, it cannot drive the rotating shaft 32 and the fixed frame 6 to rotate through the one-way bearing 31. Therefore, when the transmission gear 33 rotates back and forth, it only drives the rotating shaft 32 and the fixed frame 6 to rotate continuously in the forward direction. Due to the limitation of the number of teeth of the second rack 29 and the transmission gear 33, the rotation angle of the transmission gear 33 caused by the second rack 29 is a fixed value each time. That is, each time the second rack 29 is pulled, the transmission gear 33 will rotate a certain angle. In this way, the number of times the second rack 29 is pulled up and down can be controlled to make the rotating shaft 32 and the fixed frame 6 rotate to the corresponding angle, thereby making the core box 5 rotate to the corresponding angle, so as to facilitate cleaning, applying adhesive and assembling operations as needed.

[0047] Furthermore, after rotating to the specified angle, the limiting post 26 can be released so that the limiting post 26 can enter the corresponding limiting sleeve 27 to complete the locking of the angle of the fixing frame 6, so that the device enters a stable locking state.

[0048] 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 equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for attaching a sand core suspension wire, comprising a left support (1) and a right support (2), characterized in that, The right bracket (2) is rotatably connected to a fixed frame (6) on its side wall. The fixed frame (6) has a height adjustment groove (7) on its side wall. A double-headed threaded rod (8) is rotatably connected to the height adjustment groove (7). Both threaded sections of the double-headed threaded rod (8) are threaded with height limiting nuts (9). A height limiting plate (10) is fixedly connected to the side wall of the adjacent height limiting nut (9). A drive box (13) is fixedly connected to the side wall of the height limiting plate (10). A locking screw (14) is rotatably connected to the drive box (13). A locking nut (15) is slidably connected to the drive box (13). The locking nut (15) is fixedly connected to an L-shaped plate (12) via a connecting rod (34). A storage groove (11) is opened on the side wall of the height limiting plate (10). The L-shaped plate (12) is slidably connected to the storage groove (11). A rotating wheel (18) is fixedly connected to the locking screw (14).

2. The device for attaching sand core suspension wire according to claim 1, characterized in that, The side wall of the fixed frame (6) is fixedly connected to a rotating shaft (32), and the rotating shaft (32) is rotatably connected to the side wall of the left bracket (1).

3. The device for attaching sand core suspension wire according to claim 1, characterized in that, The drive box (13) has an air delivery groove (21) on its side wall. A piston plate (19) is slidably connected inside the air delivery groove (21). The piston plate (19) is connected to the top of the air delivery groove (21) by a first spring (20). The drive box (13) is equipped with a one-way air inlet pipe (22) and a one-way air outlet pipe (23) that communicate with the inside of the air delivery groove (21). The piston plate (19) is moved by a pushing mechanism.

4. The device for attaching sand core suspension wire according to claim 3, characterized in that, The driving mechanism includes an incomplete gear (16) and a first rack (17). The incomplete gear (16) is fixedly connected to the locking screw (14). One end of the first rack (17) is fixedly connected to the piston plate (19), and the other end of the first rack (17) extends into the drive box (13) and meshes with the incomplete gear (16).

5. The device for attaching sand core suspension wire according to claim 1, characterized in that, The left support (1) has a transmission groove (28) on its side wall. A transmission gear (33) is rotatably connected in the transmission groove (28), and the transmission gear (33) is connected to the rotating shaft (32) through a one-way bearing (31). A second rack (29) that meshes with the transmission gear (33) is slidably connected in the transmission groove (28). The second rack (29) is connected to the top of the transmission groove (28) through a third spring (30).

6. The device for attaching sand core suspension wire according to claim 1, characterized in that, The left bracket (1) has multiple limiting sleeves (27) fixedly connected to its side wall. The side wall of the fixing frame (6) has a limiting groove (24). A limiting post (26) is slidably connected in the limiting groove (24). The limiting post (26) is connected to the inner wall of the limiting groove (24) by a second spring (25), and the limiting post (26) extends into the adjacent limiting sleeve (27).

7. The process method for attaching sand cores and suspending wires in a sand core attachment device according to any one of claims 1-6, characterized in that, The process includes the following steps: S1. Based on the design scheme of the sand core, design and manufacture the core box mold, mark the core box mold and clean it, and send it for dimensional inspection; S2. Attach the connecting wire. Select an iron wire of appropriate length and diameter ≥5mm as the connecting wire (4). Insert one end of the connecting wire (4) into the hanging ring (3) on the fixed frame and wrap it to fix it. S3. Core making: Fill the core box (5) with the mixed core sand. Make sure to compact it evenly. After the core box (5) is filled, use a venting needle to make 2-3 venting holes in the sand filling area within a range of 200mm×200mm. S4. Place the core box (5). Place the core box (5) into the sand core suspension device as described in claim 1. By turning the double-headed threaded rod (8), the upper and lower limit plates (10) can fix the core boxes (5) at different heights. Then, rotate the wheel (18) to drive the locking screw (14) to rotate, so as to lock the core box (5) in the sand core suspension device as described in claim 1. S5. The upper and lower boxes are joined together to form a complete cavity. Then, smelting and casting are carried out. Molten steel is smelted in a furnace and poured into the cavity. S6. After sand removal and cutting, solidification and heat preservation are carried out, the box is opened, sand is removed and the riser is cut, and then the subsequent grinding process begins.

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