Magnet blank pressing device for neodymium iron boron preparation

Abstract

The utility model relates to the technical field of neodymium iron boron preparation, in particular to a magnet blank pressing device for neodymium iron boron preparation. The magnet blank pressing device for neodymium iron boron preparation has an automatic exhaust function. Comprising a machining table, a pushing mechanism, a vibration emptying mechanism and the like, a shaping mold is arranged on one side of the top of the machining table, a pressing mechanism used for preparing and forming materials is arranged at the position, located over the shaping mold, of the top of the machining table, and the machining table is provided with the pushing mechanism used for pushing and feeding the materials. The pushing mechanism is provided with a vibration emptying mechanism used for exhausting air from the materials. The functions of vibration emptying, automatic feeding and precise quantity-controlled discharging are integrated, so that full-process automatic operation from raw materials to formed green bodies can be realized; and through the automatic emptying mechanism, air in the powder can be effectively exhausted, so that the purposes of tightly compacting the material and improving the forming quality are achieved, and the device is suitable for the large-scale industrial production requirement of the high-performance neodymium-iron-boron magnet.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron (NdFeB) preparation technology, specifically to a magnet pressing device for NdFeB preparation. Background Technology

[0002] With the development of modern industrial networks and technology, the demand for neodymium iron boron magnetic materials is increasing, and the requirements for sintered neodymium iron boron processes are also becoming more stringent. Pressing is an important step in the production of sintered neodymium iron boron, which requires specialized pressing equipment.

[0003] Chinese utility model patent CN208555973U, filed on July 25, 2018, discloses a sintering NdFeB blank pressing device, including a base, a first pressing cylinder, a second pressing cylinder, a worktable, and a powder distributor. The first pressing cylinder is fixedly connected to the center of the top of the base, and a first template is connected to the first pressing cylinder. The worktable is fixedly connected to the base via a first support column, and the bottom of the worktable contacts the top of the first template. Electromagnetic poles are embedded in the two side edges of the worktable. The worktable has elongated holes, and magnetic plates are fixedly connected to the two sides of the center of the elongated holes. A mounting platform is fixedly connected to one side of the top of the base via a second support column, and a support platform is fixedly connected to the other side of the top of the base via a third support column. The mounting platform is connected to the powder distributor, and a square hole is opened on the side of the mounting platform away from the first motor. The support platform is connected to the second pressing cylinder, and the second pressing cylinder is connected to the second template. This blank pressing device has a simple structure, high stability, and the mold is not easily deformed.

[0004] However, in the production process of NdFeB magnets, NdFeB powder first needs to be pressed into shape using a mold. Currently, many production equipment use a natural dropping method to feed the NdFeB powder into the mold, meaning the powder falls freely into the mold cavity under gravity. However, this feeding method often cannot guarantee the uniform distribution and dense accumulation of the powder within the mold, easily leading to cavities or uneven density. This not only affects the forming quality of the compact but may also cause a decrease in the performance of the final product.

[0005] To address this, a magnet pressing device for NdFeB preparation with automatic exhaust function is proposed. Utility Model Content

[0006] In order to overcome the shortcomings of existing devices in that they are difficult to compact the material internally during use, the technical problem to be solved is to provide a magnet compaction device for NdFeB preparation with automatic degassing function.

[0007] The technical solution of this utility model is as follows: a magnet pressing device for preparing neodymium iron boron magnets, comprising a processing table, a shaping mold, and a pressing mechanism. The shaping mold is provided on one side of the top of the processing table. The pressing mechanism for preparing and shaping the material is provided on the top of the processing table and directly above the shaping mold. The device also includes a pushing mechanism and a vibration venting mechanism. The processing table is provided with a pushing mechanism for pushing and feeding the material. The pushing mechanism is provided with a vibration venting mechanism for venting the material. The vibration venting mechanism includes a second cylinder, a vibration frame, rubber rods, and a material blocking assembly. The filling box of the pushing mechanism is provided with a second cylinder. The end of the telescopic shaft of the second cylinder is connected to the vibration frame. Rubber rods are spaced apart at the bottom of the vibration frame. The filling box of the pushing mechanism is also provided with a material blocking assembly for controlling the amount of material fed.

[0008] Furthermore, the pushing mechanism includes a filling box, a feeding hopper, a dispensing nozzle, and a third cylinder. The top of the processing table is equipped with a filling box that can move horizontally back and forth via a guide rail. The top side of the filling box is connected to and communicates with the feeding hopper. The bottom of the filling box is equipped with a dispensing nozzle for uniform material discharge. The top of the processing table is equipped with a third cylinder on the side away from the shaping mold, and the telescopic shaft of the third cylinder is connected to the outside of the filling box.

[0009] Furthermore, the material blocking assembly includes an electric push rod and a material blocking cover. The material blocking cover is slidably sleeved on the outside of the material dispensing nozzle. An electric push rod is installed at the top inside the material dispensing nozzle. The telescopic axis of the electric push rod extends upward through the material dispensing nozzle and is connected to the material blocking cover. The material blocking cover can block and seal the discharge hole of the material dispensing nozzle.

[0010] Furthermore, the pressing mechanism includes a first cylinder, a mounting bracket, a hydraulic cylinder, and an extrusion head. The mounting bracket is located on the top of the processing table and close to the shaping mold. The hydraulic cylinder is mounted on the mounting bracket, and the extrusion head is connected to the end of the telescopic shaft of the hydraulic cylinder. The bottom of the processing table is provided with a first cylinder for pushing the material formed in the shaping mold upward.

[0011] Furthermore, it also includes a feeding mechanism, which includes a connecting plate, a sliding frame, a spring, a push rod, and a magnetic block. The connecting plate is slidably sleeved on the mounting frame and is connected to the upper side of the extrusion head. The two ends of the connecting plate are connected by a spring to a sliding frame that can slide up and down. A push rod is provided in the middle of the sliding frame and moves through the middle of the extrusion head. A magnetic block is provided on the outer side of the top of the processing table and attracts the lower end of the sliding frame.

[0012] Furthermore, it also includes a cushioning pad, which is provided on the side of the filling box near the shaping mold.

[0013] Furthermore, it also includes a guide trough plate, which is connected to the side of the top of the processing table near the shaping mold.

[0014] Compared with the prior art, this utility model has the following advantages: by integrating vibration venting, automatic feeding and precise quantity control functions, it can realize the fully automated operation from raw materials to molded blanks; and through the automatic venting mechanism, it can effectively remove air from the powder, thereby achieving the purpose of compacting the material and improving the molding quality, which is suitable for the large-scale industrial production needs of high-performance neodymium iron boron magnets. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the pushing mechanism of this utility model.

[0017] Figure 3 This is a cross-sectional view of the filling box of this utility model.

[0018] Figure 4 This is a cross-sectional view of the filling box and baffle of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the vibration venting mechanism of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the pressing mechanism and the ejector mechanism of this utility model.

[0021] Figure 7 This is a three-dimensional structural diagram of the material feeding mechanism of this utility model.

[0022] The components in the attached diagram are labeled as follows: 1. Processing table, 2. Shaping mold, 3. First cylinder, 4. Mounting bracket, 5. Hydraulic cylinder, 6. Extrusion head, 7. Filling box, 70. Feeding hopper, 71. Distributing nozzle, 72. Second cylinder, 73. Vibrating frame, 74. Rubber rod, 8. Third cylinder, 9. Material baffle, 90. Electric push rod, 10. Connecting plate, 11. Sliding frame, 12. Spring, 13. Top rod, 14. Magnetic block, 15. Buffer pad, 16. Guide trough plate. Detailed Implementation

[0023] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0024] Detailed Implementation: This utility model provides a magnet pressing device for preparing neodymium iron boron magnets, see below. Figures 1 to 7 The system includes a processing table 1, a shaping mold 2, a pressing mechanism, a pushing mechanism, and a vibration venting mechanism. The shaping mold 2 is located on one side of the top of the processing table 1. The pressing mechanism is located on the top of the processing table 1 and directly above the shaping mold 2, and is used to press and shape the material. The processing table 1 is equipped with a pushing mechanism for automatically pushing and feeding the material. The pushing mechanism is equipped with a vibration venting mechanism, which includes a second cylinder 72, a vibration frame 73, a rubber rod 74, and a baffle assembly. The filling box 7 of the pushing mechanism is equipped with the second cylinder 72. The end of the telescopic shaft of the second cylinder 72 is connected to the vibration frame 73. The bottom of the vibration frame 73 is spaced with rubber rods 74. The second cylinder 72 drives the vibration frame 73 and the rubber rods 74 to vibrate synchronously at high speed, which can effectively expel the air inside the material, avoid voids or uneven density during the pressing process, improve the consistency of the material blank pressing, and thus improve the quality of the material pressing and shaping. The filling box 7 of the pushing mechanism is also equipped with a baffle assembly, which is used to control the closing time and accurately control the material feeding amount.

[0025] See Figures 1 to 5 The pushing mechanism includes a filling box 7, a feeding hopper 70, a dispensing nozzle 71, and a third cylinder 8. The top of the processing table 1 is equipped with a filling box 7 that can move horizontally back and forth via a guide rail. The feeding hopper 70 is connected to and communicates with one side of the top of the filling box 7. The dispensing nozzle 71 is provided at the bottom of the filling box 7 for uniformly controlling the material discharge along the circumference. The third cylinder 8 is provided on the side of the top of the processing table 1 away from the shaping mold 2, and the telescopic shaft of the third cylinder 8 is connected to the outside of the filling box 7 for horizontally back and forth pushing the filling box 7 to achieve the purpose of automatic feeding.

[0026] See Figure 3 and Figure 4The material blocking assembly includes an electric push rod 90 and a material blocking cover 9. The material blocking cover 9 is slidably sleeved on the outside of the dispensing nozzle 71. The electric push rod 90 is installed at the top inside the dispensing nozzle 71. The telescopic axis of the electric push rod 90 extends upward through the dispensing nozzle 71 and connects with the material blocking cover 9. The material blocking cover 9 can block and seal the discharge hole of the dispensing nozzle 71. The opening and closing of the material blocking cover 9 is controlled by the electric push rod 90 to achieve precise control of the material feeding process and the amount of material fed, avoid material leakage or blockage, and ensure the stability of the pressing process.

[0027] See Figure 1 and Figure 6 The pressing mechanism includes a first cylinder 3, a mounting frame 4, a hydraulic cylinder 5, and an extrusion head 6. The mounting frame 4 is located on the top of the processing table 1 and close to the forming mold 2. The hydraulic cylinder 5 is mounted on the mounting frame 4. The end of the telescopic shaft of the hydraulic cylinder 5 is connected to the extrusion head 6. The telescopic shaft of the hydraulic cylinder 5 is controlled to extend so that the extrusion head 6 can cooperate with the forming mold 2 to press and form the material. The bottom of the processing table 1 is provided with a first cylinder 3 for pushing the material formed in the forming mold 2 upward, so as to achieve the purpose of automatic ejection, demolding and unloading.

[0028] Pre-mixed neodymium iron boron powder (hereinafter referred to as "material") is added to the filling box 7 through the feeding hopper 70. The baffle 9 can seal the dispensing nozzle 71. When it is necessary to add the material into the shaping mold 2, simply control the third cylinder 8 to extend its telescopic shaft, thereby pushing the filling box 7 to the right to the shaping mold 2 so that the dispensing nozzle 71 is aligned with the shaping mold 2. Then, control the electric push rod 90 to adjust the position and height of the baffle 9 accordingly to achieve precise control of the dispensing amount of the dispensing nozzle 71. Then, control the vibration motor on the vibration frame 73 to start, and control the second cylinder 72 to drive the vibration frame 73 and the rubber rod 74 to move up and down repeatedly so that the rubber rod 74 can be inserted into the shaping mold 2 filled with material. Under the vibration of the vibration frame 73, the material in the shaping mold 2 is added. The material undergoes vibration-induced venting. After venting, the electric push rod 90 is controlled to move the baffle 9 downwards and close. Then, the second cylinder 72 is controlled to move the vibrating frame 73 and the rubber rod 74 upwards and reset, and the third cylinder 8 is controlled to move the filling box 7 to the left and reset. Subsequently, the hydraulic cylinder 5 is controlled to drive the extrusion head 6 downwards, which, in conjunction with the shaping mold 2, performs high-pressure pressing on the vented material. During this process, the material is gradually compacted within the shaping mold 2, forming a dense magnetic blank. Thus, the second cylinder 72 drives the vibrating frame 73 to move up and down, causing the rubber rod 74 to vibrate the bottom of the filling box 7 and the dispensing nozzle 71 area at high frequency, allowing the material to be discharged smoothly and initially compacted. This effectively eliminates air gaps between materials, achieving automatic venting and improving the pressing density of the material.

[0029] Specific Implementation Method Two: Based on Specific Implementation Method One, see [link to Implementation Method Two] Figure 1 , Figure 6 and Figure 7 It also includes an ejector mechanism, which includes a connecting plate 10, a sliding frame 11, a spring 12, an ejector rod 13, and a magnetic block 14. The connecting plate 10 is slidably mounted on the mounting frame 4 and is connected to the upper side of the extrusion head 6. The two ends of the connecting plate 10 are connected by the spring 12 to the sliding frame 11, which can slide up and down. The ejector rod 13 is provided in the middle of the sliding frame 11 and moves through the middle of the extrusion head 6. The outer side of the top of the processing table 1 is provided with a magnetic block 14 that attracts the lower end of the sliding frame 11. By using the adsorption structure of the spring 12 and the magnetic block 14, the hysteresis generated when the sliding frame 11 moves upward can be used to prevent the formed blank material from sticking to the extrusion head 6, thereby effectively avoiding damage to the formed blank.

[0030] See Figure 1 and Figure 2 It also includes a buffer pad 15, which is provided on the side of the filling box 7 near the shaping mold 2, and a guide plate 16, which is connected to the top of the processing table 1 near the shaping mold 2. The buffer pad 15 can be used to automatically push the demolded blank material to the right side onto the guide plate 16, thereby facilitating the unloading of the blank material.

[0031] After the material is formed, when the hydraulic cylinder 5 moves the connected extrusion head 6 and connecting plate 10 upward to reset, the magnetic block 14 and the lower end of the sliding frame 11 act magnetically. When the connecting plate 10 moves upward, the sliding frame 11 and the push rod 13 lag, which in turn generates a downward pushing force on the pressed material, preventing the formed material from sticking to the lower end face of the extrusion head 6, thus achieving the purpose of anti-sticking. During the process of the connecting plate 10 moving upward to reset, when the elastic force of the spring 12 is greater than the attraction force between the magnetic block 14 and the sliding frame 11, the sliding frame 11 is disengaged from the magnetic block 14. At the same time, the first cylinder 3 is controlled to extend its telescopic axis upward, pushing the formed material blank out of the mold 2, thus completing the demolding action. When the third cylinder 8 controls the filling box 7 to move to the right again, the buffer pad 15 can push the formed material blank to the right to the guide trough plate 16 to achieve the purpose of automatic sliding feeding.

[0032] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A magnet pressing device for preparing neodymium iron boron magnets, comprising a processing table (1), a shaping mold (2), and a pressing mechanism, wherein the shaping mold (2) is disposed on one side of the top of the processing table (1), and a pressing mechanism for preparing and shaping the material is disposed on the top of the processing table (1) and directly above the shaping mold (2), characterized in that: It also includes a pushing mechanism and a vibration venting mechanism. The processing table (1) is provided with a pushing mechanism for pushing and feeding materials. The pushing mechanism is provided with a vibration venting mechanism for venting materials. The vibration venting mechanism includes a second cylinder (72), a vibration frame (73), a rubber rod (74) and a material blocking assembly. The filling box (7) of the pushing mechanism is provided with a second cylinder (72). The end of the telescopic shaft of the second cylinder (72) is connected to the vibration frame (73). The bottom of the vibration frame (73) is provided with rubber rods (74) at intervals. The inner side of the filling box (7) of the pushing mechanism is also provided with a material blocking assembly for controlling the amount of material fed.

2. The magnet pressing device for preparing NdFeB magnets as described in claim 1, characterized in that: The pushing mechanism includes a filling box (7), a feeding hopper (70), a dispensing nozzle (71), and a third cylinder (8). The top of the processing table (1) is equipped with a filling box (7) that can move horizontally back and forth via a guide rail. The top side of the filling box (7) is connected to and communicates with the feeding hopper (70). The bottom of the filling box (7) is equipped with a dispensing nozzle (71) for uniform material discharge. The top of the processing table (1) is equipped with a third cylinder (8) on the side away from the shaping mold (2), and the telescopic shaft of the third cylinder (8) is connected to the outside of the filling box (7).

3. The magnet pressing device for preparing neodymium iron boron magnets as described in claim 2, characterized in that: The material blocking assembly includes an electric push rod (90) and a material blocking cover (9). The material blocking cover (9) is slidably sleeved on the outside of the material dispensing nozzle (71). An electric push rod (90) is installed at the top inside the material dispensing nozzle (71). The telescopic axis of the electric push rod (90) extends upward through the material dispensing nozzle (71) and is connected to the material blocking cover (9). The material blocking cover (9) can block and seal the discharge hole of the material dispensing nozzle (71).

4. The magnet pressing device for preparing NdFeB magnets as described in claim 1, characterized in that: The pressing mechanism includes a first cylinder (3), a mounting frame (4), a hydraulic cylinder (5), and an extrusion head (6). The mounting frame (4) is located on the top of the processing table (1) and close to the shaping mold (2). The hydraulic cylinder (5) is mounted on the mounting frame (4). The extrusion head (6) is connected to the telescopic shaft end of the hydraulic cylinder (5). The bottom of the processing table (1) is provided with a first cylinder (3) for pushing the material formed in the shaping mold (2) upward.

5. The magnet pressing device for preparing NdFeB magnets as described in claim 4, characterized in that: It also includes a feeding mechanism, which includes a connecting plate (10), a sliding frame (11), a spring (12), a push rod (13), and a magnetic block (14). The connecting plate (10) is slidably sleeved on the mounting frame (4), and the connecting plate (10) is connected to the upper side of the extrusion head (6). The two ends of the connecting plate (10) are connected by a spring (12) to a sliding frame (11) that can slide up and down. The middle part of the sliding frame (11) is provided with a push rod (13), and the push rod (13) moves through the middle part of the extrusion head (6). The outer side of the top of the processing table (1) is provided with a magnetic block (14) that attracts the lower end of the sliding frame (11).

6. The magnet pressing device for preparing NdFeB magnets as described in claim 1, characterized in that: It also includes a cushioning pad (15), which is provided on the side of the filling box (7) near the shaping mold (2).

7. The magnet pressing device for preparing neodymium iron boron magnets as described in claim 1, characterized in that: It also includes a guide trough plate (16), and the top of the processing table (1) is connected to the guide trough plate (16) on the side near the shaping mold (2).

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