Automatic pushing and feeding device

Abstract

The application discloses an automatic pushing and feeding device and belongs to the technical field of sintered Nd-Fe-B permanent magnet materials. The device comprises a mounting plate, a pushing pipe arranged above the mounting plate, one end of the pushing pipe being arranged towards a mold, the other end of the pushing pipe being provided with an end plate, the end plate being provided with a pushing cylinder, the pushing cylinder being fixed on the end plate, the output end of the pushing cylinder being located in the pushing pipe, the output end of the pushing cylinder being provided with a pushing piston, the outer surface of the pushing piston being in sliding contact with the inner surface of the pushing pipe, the middle position of the upper surface of the pushing pipe being provided with a feeding hopper, the upper side of the feeding hopper being provided with a feeding pipe, the feeding pipe being provided with a control valve, the lower surface of the pushing pipe being provided with a plurality of fixing plates, the fixing plates being used for fixing the pushing pipe on the mounting plate, and the mounting plate being connected to the outer surface of the mold. The technical scheme is used for realizing automatic feeding of a bidirectional pressing assembly and improving feeding efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of sintered NdFeB permanent magnet materials, specifically relating to an automatic feeding device. Background Technology

[0002] Before sintering, Nd-Fe-B powder needs to be compacted. The relative density of the compact is generally 50%–70%, and the porosity is 50%–30%. The contact between particles is mechanical, resulting in low bonding strength. When the compaction pressure is high, some of the powder particles that have already come into contact with each other are deformed (elastic or plastic deformation). Such powder compacts do not possess the microstructure required for high permanent magnetic properties. To further increase the density, improve the contact properties between powder particles, increase strength, and give the magnet the microstructure characteristics required for high permanent magnetic properties, the compact needs to be heated to a temperature below the melting point of the powder matrix phase and heat-treated for a period of time. This process is called sintering.

[0003] In the pressing process, a bidirectional pressing method is usually used. In this method, since the pressing components are set at both the top and bottom of the mold, the movement path of the pressing components completely covers the space directly above the mold. Therefore, in order to avoid interference with the movement of the pressing components, it is inconvenient to set up a feeding component. As a result, the powder is usually added manually for feeding. However, manual feeding not only reduces the efficiency of the pressing process, but the powder generated during feeding can also affect the health of the operators. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an automatic feeding device for automatically feeding bidirectional pressing components and improving feeding efficiency.

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

[0006] This invention discloses an automatic feeding device, disposed on one side of a bidirectional pressing assembly. The bidirectional pressing assembly includes a mold and a mounting plate. A pusher tube is disposed above the mounting plate, with one end of the pusher tube facing the mold and the other end of the pusher tube having an end plate. A pusher cylinder is disposed on the end plate and fixed to the end plate, with its output end located inside the pusher tube. A pusher piston is disposed on the output end of the pusher cylinder, with its outer surface in sliding contact with the inner surface of the pusher tube. A feed funnel is disposed at the middle of the upper surface of the pusher tube, and a feeding pipe is disposed above the feed funnel, with a control valve disposed on the feeding pipe. Several fixing plates are disposed on the lower surface of the pusher tube, fixing the pusher tube to the mounting plate. The mounting plate is connected to the outer surface of the mold. An outlet is disposed on the lower surface of the pusher tube near the end plate, located between the pusher piston and the end plate. A collection box is disposed below the outlet and placed on the mounting plate.

[0007] Furthermore, the upper end of the feeding funnel is provided with a cover plate, and the end of the feeding pipe is connected to the middle of the cover plate.

[0008] Furthermore, a tubular feeding bag is provided on the end of the pusher tube facing the mold. One end of the feeding bag is fixed to the end of the pusher tube, and a traction rope is provided on the other end of the feeding bag. One end of the traction rope is connected to the other end of the feeding bag, and the other end of the traction rope is connected to the middle of the end of the pusher piston facing the mold.

[0009] Furthermore, a hollow, semi-circular counterweight is provided at one end of the feeding bag connected to the traction rope. The surface of the counterweight is provided with several cutting holes. The inner side of the end of the feeding bag is connected to the outer surface of the counterweight, and the protruding end of the counterweight is located inside the feeding bag and connected to one end of the traction rope.

[0010] Furthermore, the outer surface of the counterweight is provided with several circumferentially distributed springs, one end of which is fixed to the inner side of the end of the feeding bag, and the other end of which is fixed to the outer surface of the counterweight.

[0011] Furthermore, the inner side of the feeding bag is provided with several evenly distributed columnar protrusions, one end of which is fixed to the inner side of the feeding bag.

[0012] Furthermore, the feeding bag is funnel-shaped, and the large-diameter end of the feeding bag is fixedly connected to the end of the pusher tube.

[0013] Furthermore, the bidirectional pressing assembly also includes an upper pressing assembly and a lower pressing assembly. Both the upper pressing assembly and the lower pressing assembly include a pressing cylinder and a pressure plate. The output end of the pressing cylinder is fixed to the middle of the pressure plate, and the edges of the two pressure plates match the inner surface of the mold.

[0014] Furthermore, the traction rope is an elastic rope.

[0015] The beneficial effects of this invention are as follows:

[0016] This technical solution enables automatic feeding of materials into the mold during the pressing of neodymium iron boron permanent magnet materials, reducing the labor intensity of workers and improving pressing efficiency. Furthermore, the powder feeding method in this solution is ingenious and will not interfere with the pressing process of the bidirectional pressing component. At the same time, it is installed outside the mold, so it does not occupy the space covered by the movement trajectory of the pressing component. Therefore, during feeding, the pressing component does not need to move up a large stroke to avoid the material, which simplifies the feeding process and improves feeding efficiency.

[0017] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0019] Figure 1 This is a three-dimensional schematic diagram of the feeding device of the present invention installed on one side of the bidirectional pressing assembly;

[0020] Figure 2 This is an internal cross-sectional view of the feeding device of the present invention feeding material into the mold;

[0021] Figure 3 This is a schematic internal cross-sectional view of the feeding device of the present invention during the addition of powder into the push tube.

[0022] Figure 4 This is a partially enlarged schematic diagram showing the connection between the end of the feeding bag and the counterweight in the feeding device of the present invention.

[0023] The following labels are shown in the attached diagram:

[0024] 1. Mounting plate; 2. Pusher tube; 3. Fixing plate; 4. End plate; 5. Pusher cylinder; 6. Pusher piston; 7. Feed bag; 8. Counterweight; 9. Traction rope; 10. Cutting hole; 11. Spring; 12. Columnar protrusion; 13. Feed funnel; 14. Feeder tube; 15. Control valve; 16. Cover plate; 17. Discharge port; 18. Collection box; 19. Mold; 20. Upper pressing assembly; 21. Lower pressing assembly; 22. Powder. Detailed Implementation

[0025] like Figures 1-4 As shown, the present invention discloses an automatic feeding device, which is disposed on one side of a bidirectional pressing assembly. The bidirectional pressing assembly includes a mold 19 and a mounting plate 1. A pusher tube 2 is disposed above the mounting plate 1, and the pusher tube 2 is disposed perpendicular to the mold 19. One end of the pusher tube 2 faces the mold 19, and the other end of the pusher tube 2 is provided with an end plate 4, which is fixed to the end face of the pusher tube 2. A pusher cylinder 5 is disposed on the end plate 4, and the pusher cylinder 5 is fixed to the end plate 4. The output end of the pusher cylinder 5 is located inside the pusher tube 2. A pusher piston 6 is disposed on the output end of the pusher cylinder 5. The surface of the pusher tube 2 slides in contact with the inner surface of the pusher tube 2. A feeding funnel 13 is provided at the middle of the upper surface of the pusher tube 2. A feeding pipe 14 is provided above the feeding funnel 13. A control valve 15 is provided on the feeding pipe 14. Several fixing plates 3 are provided on the lower surface of the pusher tube 2. The fixing plates 3 fix the pusher tube 2 to the mounting plate 1. The mounting plate 1 is connected to the outer surface of the mold 19. A discharge port 17 is provided on the lower surface of the pusher tube 2 near the end plate 4. The discharge port 17 is located between the pusher piston 6 and the end plate 4. A collection box 18 is provided below the discharge port 17. The collection box 18 is placed on the mounting plate 1.

[0026] The working principle of the above technical solution is as follows:

[0027] Powder 22 is fed into pusher pipe 2 through feed pipe 14. At the same time, the setting of control valve 15 can control the amount of powder 22 fed in according to its opening and closing time. The specific control method is existing technology and will not be described in detail here. After the powder 22 is delivered into pusher pipe 2, pusher cylinder 5 is activated. Pusher cylinder 5 drives pusher piston 6 to move, thereby pushing the powder 22 in it to the end of pusher pipe 2 and then discharging it into mold 19, thus achieving efficient pushing effect. At the same time, the setting of discharge port 17 can push the residual powder 22 that has fallen from feed funnel 13 into the space between pusher piston 6 and end plate 4 when pusher piston 6 is reset, and then discharge it from discharge port 17 into collection box 18, thereby clearing the return path of pusher piston and collecting residual powder 22 for use.

[0028] In one feasible embodiment, the upper end of the feed hopper 13 is provided with a cover plate 16, and the end of the feed pipe 14 is connected to the middle of the cover plate 16. The cover plate 16 can block the dust raised when the powder 22 falls into the feed hopper 13, thereby improving the cleanliness of the production environment.

[0029] In one feasible embodiment, a tubular feeding bag 7 is provided on one end of the push tube 2 facing the mold 19. One end of the feeding bag 7 is fixed to the end of the push tube 2, and a traction rope 9 is provided on the other end of the feeding bag 7. One end of the traction rope 9 is connected to the inner side of the other end of the feeding bag 7, and the other end of the traction rope 9 is connected to the middle of the push piston 6 facing the mold 19.

[0030] The feeding bag 7 is designed so that when the pushing cylinder 5 is in the initial position, the traction rope 9 pulls the end of the feeding bag 7 into the pushing tube 2. After the powder 22 is added into the pushing tube 2, the pushing piston 6 pushes the powder 22 to move, and the powder 22 pushes the feeding bag 7 to move. That is, when the feeding bag 7 moves to the end of the pushing tube 2, it will fall into the mold 19. Then, the powder 22 will be discharged downward into the mold 19 through the feeding bag 7. The feeding bag 7 can buffer the falling of the powder 22, reduce its falling speed, and reduce the generation of dust. At the same time, the feeding bag 7 can also catch the powder 22 at its end. During the resetting process of the pushing piston 6, the traction rope 9 will drive the end of the feeding bag 7 to move upward, and the powder 22 will be gradually discharged into the mold 19 under the action of gravity, further reducing the generation of dust from the powder 22 falling into the mold 19.

[0031] In one feasible embodiment, a hollow, semi-circular counterweight 8 is provided at one end of the feeding bag 7 connected to the traction rope 9. The surface of the counterweight 8 is provided with several cutting holes. The inner side of the end of the feeding bag 7 is connected to the outer surface of the counterweight 8, and the protruding end of the counterweight 8 is located inside the feeding bag 7 and connected to one end of the traction rope 9.

[0032] It is easy to understand that at this time, the end of the pusher tube 2 is set on the outside of the template. During the downward fall of the counterweight 8, it will fall into the mold 19. That is, the setting of the pusher tube 2 will not interfere with the pressing of the bidirectional pressing component. Therefore, the position of the upper pressing component 20 does not need to be set too high or the stroke too large (if there is interference, the upper pressing component 20 needs to make room for the pusher tube 2 to install, and after the pusher tube 2 finishes feeding, it also needs to be reset by means of a slide table, which is relatively complicated).

[0033] The counterweight 8 is designed to cause the feeding bag 7 to fall downwards. Under the push of the powder 22, the counterweight 8 will cause the feeding bag 7 to fall into the mold 19 first, and then the powder 22 will be discharged downwards from the end of the push tube 2. This ensures the falling and placement effect of the feeding bag 7. At the same time, the cutting hole 10 is designed so that when the powder 22 falls onto the counterweight 8 and comes into contact with the cutting hole 10, the cutting hole 10 will cut and disperse the clumps of powder 22, improving the subsequent pressing effect.

[0034] In one feasible embodiment, a plurality of circumferentially distributed springs 11 are provided on the outer surface of the counterweight 8, one end of the spring 11 is fixed to the inner side of the end of the feeding bag 7, and the other end of the spring 11 is fixed to the outer surface of the counterweight 8.

[0035] The spring 11 creates a gap between the feeding bag 7 and the counterweight 8, facilitating the discharge of powder 22. When the counterweight 8 is reset by the traction rope 9, the spring 11 will strike the inner surface of the mold 19, causing vibration and shaking out the residual powder 22 in the feeding bag 7. The counterweight 8 also has the advantage of being able to move up and down continuously through the short-stroke reciprocating motion of the pusher cylinder 5, thereby achieving shaking discharge and improving the discharge effect in the feeding bag 7.

[0036] In one feasible embodiment, the inner side of the feeding bag 7 is provided with several evenly distributed columnar protrusions 12. One end of the columnar protrusions 12 is fixed to the inner side of the feeding bag 7. The columnar protrusions 12 can prevent the inner wall of the feeding bag 7 from sticking together, which would prevent the residual powder 22 from being shaken out. Of course, the protrusions can also be rubber soft rods, which play a role in supporting the feeding bag 7, so that the feeding bag 7 is always kept open, further improving the leakage effect.

[0037] In one feasible embodiment, the feeding bag 7 is funnel-shaped, and the large-diameter end of the feeding bag 7 is fixedly connected to the end of the push tube 2, so that the traction rope 9 can guide the feeding bag 7 into the interior of the push tube 2.

[0038] In one feasible embodiment, the bidirectional pressing assembly further includes an upper pressing assembly 20 and a lower pressing assembly 21, both of which include a pressing cylinder and a pressure plate. The output end of the pressing cylinder is fixed to the middle of the pressure plate, and the edges of the two pressure plates match the inner surface of the mold 19.

[0039] In one feasible embodiment, the traction rope 9 is an elastic rope. The advantage of the elastic rope is that when the counterweight 8 falls into the mold 19, the elastic rope is stretched and falls to the lower part of the mold 19, making it easier to add material from near the bottom. At the same time, when the elastic rope is stretched, it will bounce up and down continuously, thereby improving the material discharge effect. Furthermore, when the traction rope 9 pulls the counterweight 8 into the push tube 2, the elastic rope loses the effect of the counterweight 8's gravity and will reset, thereby moving the counterweight 8 towards the side closer to the push piston 6. This will pull the end of the feeding bag 7 into the push tube 2, thereby pulling all of the feeding bag 7 into the push tube 2, thus avoiding the problem of some feeding bags 7 hanging above the mold 19 and interfering with the movement trajectory of the pressure plate.

[0040] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An automatic feeding device, disposed on one side of a bidirectional pressing assembly, the bidirectional pressing assembly including a mold (19), characterized in that: The system includes a mounting plate (1), with a pusher tube (2) above the mounting plate (1). One end of the pusher tube (2) faces the mold (19), and the other end of the pusher tube (2) has an end plate (4). A pusher cylinder (5) is mounted on the end plate (4), and the pusher cylinder (5) is fixed to the end plate (4). The output end of the pusher cylinder (5) is located inside the pusher tube (2). A pusher piston (6) is mounted on the output end of the pusher cylinder (5). The outer surface of the pusher piston (6) slides in contact with the inner surface of the pusher tube (2). A feed funnel (13) is located at the middle of the upper surface of the pusher tube (2). A feeding pipe (14) is provided above the feeding hopper (13), and a control valve (15) is provided on the feeding pipe (14). Several fixing plates (3) are provided on the lower surface of the pusher pipe (2). The fixing plates (3) fix the pusher pipe (2) to the mounting plate (1). The mounting plate (1) is connected to the outer surface of the mold (19). A discharge port (17) is provided on the lower surface of the pusher pipe (2) near the end plate (4). The discharge port (17) is located between the pusher piston (6) and the end plate (4). A collection box (18) is provided below the discharge port (17). The collection box (18) is placed on the mounting plate (1). The push tube (2) has a tubular feeding bag (7) at one end facing the mold (19). One end of the feeding bag (7) is fixed to the end of the push tube (2). The other end of the feeding bag (7) has a traction rope (9). One end of the traction rope (9) is connected to the other end of the feeding bag (7). The other end of the traction rope (9) is connected to the middle of the push piston (6) facing the mold (19).

2. The automatic feeding device according to claim 1, characterized in that: The upper end of the feed hopper (13) is provided with a cover plate (16), and the end of the feed pipe (14) is connected to the middle part of the cover plate (16).

3. The automatic feeding device according to claim 1, characterized in that: The feeding bag (7) is connected to the traction rope (9) at one end and is provided with a hollow and semi-circular counterweight (8). The surface of the counterweight (8) is provided with several cutting holes. The inner side of the end of the feeding bag (7) is connected to the outer surface of the counterweight (8), and the protruding end of the counterweight (8) is located inside the feeding bag (7) and is connected to one end of the traction rope (9).

4. The automatic feeding device according to claim 3, characterized in that: The outer surface of the counterweight (8) is provided with several circumferentially distributed springs (11). One end of the spring (11) is fixed to the inner side of the end of the feeding bag (7), and the other end of the spring (11) is fixed to the outer surface of the counterweight (8).

5. An automatic feeding device according to claim 4, characterized in that: The inner side of the feeding bag (7) is provided with several evenly distributed columnar protrusions (12), one end of which is fixed to the inner side of the feeding bag (7).

6. An automatic feeding device according to claim 5, characterized in that: The feeding bag (7) is funnel-shaped, and the large-diameter end of the feeding bag (7) is fixedly connected to the end of the push tube (2).

7. An automatic feeding device according to claim 1, characterized in that: The bidirectional pressing assembly also includes an upper pressing assembly (20) and a lower pressing assembly (21). Both the upper pressing assembly (20) and the lower pressing assembly (21) include a pressing cylinder and a pressing plate. The output end of the pressing cylinder is fixed to the middle of the pressing plate, and the edges of the two pressing plates match the inner surface of the mold (19).

8. The automatic feeding device according to claim 1, characterized in that: The traction rope (9) is an elastic rope.

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