Rare earth permanent magnet material neodymium iron boron forming and profiling device

Abstract

The invention relates to the technical field of neodymium iron boron processing, in particular to a rare earth permanent magnet material neodymium iron boron forming and profiling device. The vertical frame is arranged on the extension table, a fixed weighing device and a sliding contact frame are arranged on the vertical frame, the contact frame is in contact fit with the detection end of the weighing device, a circulation frame communicated with the feeding part is arranged in the contact frame, the bottom of the circulation frame is communicated with a silicon rubber case with a valve, and a pushing piece connected with the tail end of the silicon rubber case is arranged in the circulation frame. A set of efficient automatic production structure is integrated and constructed, continuous operation of the whole process of neodymium iron boron magnetic powder from feeding, weighing, filling to pressing is achieved, the structure adopts an inclined design, the fluidity problem caused by magnetic powder caking is relieved, the process is integrated, the material transfer loss problem caused by sub-links is reduced, and the production efficiency is improved. Coherence and high efficiency of the production process are ensured; in addition, adjustable driving assemblies such as double-shaft air cylinders and electric sliding rails are adopted, so that all links of the device can be quickly connected, and the adaptability of the device is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of NdFeB processing, and particularly to a molding and pressing device for rare earth permanent magnet material NdFeB. Background Art

[0002] As the third-generation rare earth permanent magnet material, the "compression molding" step in the production process of neodymium iron boron (NdFeB) is crucial for ensuring the density uniformity and magnetic direction consistency of the final product. The common operating methods are divided into two types: manual and machine. Usually, horizontal molds are used for pressing and demolding. However, in actual applications, the combined use of these methods still faces certain limitations.

[0003] Firstly, in the manual powder filling method, due to the errors caused by relying on manual operations, the phenomenon of uneven magnetic powder filling often occurs, which in turn causes obvious density differences and stratification in the pressed magnetic blanks. In addition, the NdFeB magnetic powder particles are delicate and easy to agglomerate. When directly manually feeding the material, powder blockage is likely to occur, resulting in uneven compactness inside the mold and requiring additional manual intervention, such as adjusting by knocking on the mold, which affects the stability of product quality.

[0004] Secondly, the use of automated machines can further improve product quality problems. However, due to the separation of the feeding, pressing, and demolding links, the connection between each step is not smooth enough, and the material is prone to deviation during the transfer process, affecting the consistency of the final product.

[0005] Therefore, in view of the above problems, it is necessary to design a molding and pressing device for rare earth permanent magnet material NdFeB with continuous operation ability, integrated process, and strong adaptability to overcome the limitations of the prior art, so as to provide a more stable and efficient production process and produce higher-quality NdFeB magnets. Summary of the Invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a molding and pressing device for rare earth permanent magnet material NdFeB with continuous operation ability, integrated process, and strong adaptability.

[0007] The technical implementation solution of the present invention is: a molding and pressing device for rare earth permanent magnet material NdFeB, comprising: A machine base, on the top of which an extension platform is provided; A bracket, arranged on the machine base, on which a guiding frame for placing a molding mold is inclinedly arranged. The end of the guiding frame is connected to the extension platform, and a double-axis cylinder I with a telescopic end that can extend into the guiding frame is installed inside the extension platform; A feeding part, arranged on the machine base; The vertical frame is set on the extension table. A fixed weighing device and a sliding contact frame are installed on the vertical frame. The contact frame is in contact and cooperation with the detection end of the weighing device. A circulation frame communicating with the feeding part is arranged inside the contact frame. A silica gel sleeve with a valve is connected to the bottom of the circulation frame. And a pushing member connected to the end of the silica gel sleeve is arranged inside the circulation frame. The telescopic sleeve is connected to the bottom of the circulation frame and wraps the silica gel sleeve. A quantitative frame with a partition plate is connected to the bottom of the telescopic sleeve. The interior of the quantitative frame is divided into multiple compartments. Hoppers corresponding to each compartment are arranged in a row at the bottom of the quantitative frame. Feed pipes are connected to the bottoms of all the hoppers. The bottom ends of the feed pipes are connected to extrusion ends. A ball valve rotates inside the extrusion ends. The mounting frame is set on the guiding frame. A fixed mold with holes aligned with the extrusion ends is arranged on the mounting frame, and an electric slide rail with a slider connected to the quantitative frame. A double-axis cylinder three with a telescopic end assembling a moving mold is also arranged on the guiding frame. The moving mold is fitted with the fixed mold.

[0008] Optionally, the feeding part includes a column set on the top of the machine base. A reserve cylinder for storing magnetic powder is arranged on the column. A delivery pump is installed at the bottom opening of the reserve cylinder. The outlet of the delivery pump is connected to a delivery pipe communicating with the circulation frame.

[0009] Optionally, the pushing member includes an electric lead screw arranged inside the circulation frame. A shielding cover covering the electric lead screw is arranged between the inner walls of the circulation frame. And a pushing rod is threadedly arranged on the electric lead screw. The end of the pushing rod is connected to the bottom end of the silica gel sleeve to push the silica gel sleeve to bend and drive the valve to move.

[0010] Optionally, a vibration motor is also arranged on the outer wall of the quantitative frame. The vibrating end of the vibration motor is connected to a spiral guide rod located inside the quantitative frame. The spiral guide rod has branches with the same number as the compartments of the quantitative frame. An extension guide rod extending into the interior of the feed pipe is connected to the end of each branch of the spiral guide rod.

[0011] Optionally, an adapter frame is also arranged on the fixed mold. Through holes with the same number and layout as the extrusion ends are opened on the adapter frame. The extrusion ends slide through the through holes and coincide with the holes after the moving mold and the fixed mold are fitted. Clamping ends rotatably connected to the corresponding extrusion ends are arranged at both ends of the ball valve. A connecting shaft is clamped between adjacent clamping ends and at the head and tail clamping ends. One-word grooves for abutting and sliding fit with the end parts of the corresponding connecting shafts are also opened on both sides of the extrusion ends. And drive motors with output ends connected to the adjacent connecting shafts are installed on both sides of the adapter frame.

[0012] Optionally, guiding grooves are symmetrically opened at the bottom of the fixed mold. An adapter template abutting and cooperating with the moving mold slides between the guiding grooves. Elastic members are arranged between the inner walls of the adapter template and the guiding grooves.

[0013] Optionally, it further includes a double-axis cylinder two disposed on one side of the machine base. The telescopic end of the double-axis cylinder two passes through the side wall of the guide frame, and a notch opposite to the telescopic end of the double-axis cylinder two is provided on the guide frame.

[0014] Optionally, it further includes scrapers disposed on both sides of the bottom end of the valve housing.

[0015] Compared with the prior art, the present invention has the following advantages: By integrating a storage cylinder, a circulation frame, a quantitative frame, a material pipe, an extrusion end, and a pressing die, a set of efficient automated production structures are constructed, realizing continuous operation of the whole process from feeding, weighing, filling to pressing of neodymium iron boron magnetic powder. The structure adopts an inclined design, thereby providing a clear guiding direction for material movement, alleviating the fluidity problem caused by magnetic powder agglomeration, reducing manual intervention, making the process integrated, and reducing the material transfer loss problem caused by sub-links to ensure the coherence and efficiency of the production process; In addition, adjustable driving components such as various double-axis cylinders and electric slide rails are adopted, enabling each link of the equipment to be quickly connected, thus quickly and flexibly adapting to different production requirements, effectively improving the adaptability of the device, and significantly improving production efficiency and product quality consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic assembly structure diagram of the present invention.

[0017] Figure 2 It is a three-dimensional structural sectional view of components such as the guide frame, double-axis cylinder one, and double-axis cylinder two of the present invention.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of each component on the guide frame of the present invention.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of components such as the conveying pipe, circulation frame, and silica gel sleeve of the present invention.

[0020] Figure 5 It is a three-dimensional structural sectional view of components such as the electric lead screw, push rod, and shielding cover of the present invention.

[0021] Figure 6 It is a three-dimensional structural sectional view of components such as the telescopic sleeve, quantitative frame, and connection frame of the present invention.

[0022] Figure 7 It is a three-dimensional structural schematic diagram of components such as the quantitative frame, electric slide rail, and fixed die of the present invention.

[0023] Figure 8 It is a three-dimensional structural sectional view of components such as the vibration motor, spiral guide rod, and extension guide rod of the present invention.

[0024] Figure 9 It is a three-dimensional structural sectional view of components such as the drive motor, ball valve, and clamping end of the present invention.

[0025] Figure 10 This is a schematic plan view of components such as the ball valve, clamping end, and connecting shaft of the present invention.

[0026] Figure 11 This is a sectional view of the three-dimensional structure of components such as the fixed mold, connecting template, and elastic member of the present invention.

[0027] The markings of each component in the attached drawings are as follows: 100: forming mold, 1: machine base, 11: extension platform, 2: support, 21: guiding frame, 22: first double-axis cylinder, 23: second double-axis cylinder, 3: column, 31: storage cylinder, 32: delivery pump, 33: delivery pipe, 4: vertical frame, 41: weighing device, 42: contact frame, 43: circulation frame, 431: electric lead screw, 432: push rod, 433: shielding cover, 44: silica gel sleeve, 45: valve, 46: scraper, 5: telescopic sleeve, 51: metering frame, 511: vibration motor, 512: spiral guide rod, 513: extension guide rod, 52: hopper, 521: partition plate, 53: material pipe, 54: extrusion end, 541: slotted hole, 6: mounting frame, 60: electric slide rail, 61: fixed mold, 611: guiding groove, 612: connecting template, 613: elastic member, 62: third double-axis cylinder, 63: moving mold, 7: connecting frame, 71: driving motor, 72: ball valve, 73: clamping end, 74: connecting shaft. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment: A neodymium iron boron forming and pressing device for rare earth permanent magnet materials, as Figures 1-8 shown, includes: A machine base 1, on the front side of the top of the machine base 1, there is a convexly arranged extension platform 11, and the rear part of the extension platform 11 is an inclined surface that slopes downward; The bracket 2 is fixedly arranged at the rear side of the top of the machine base 1. A guiding frame 21 for placing the molding die 100 is obliquely arranged on the bracket 2. The molding die 100 is used for placing the magnet embryos after being pressed and formed. And through the obliquely arranged guiding frame 21, the position adjustment of the molding die 100 is smoother, which is convenient for the subsequent processes of replacing the molding die 100 and filling the magnet embryos. At the same time, the end of the guiding frame 21 is connected to the extension table 11. The inclined surface design of the extension table 11 is used to close the end of the guiding frame 21 and effectively limit the movement range of the molding die 100. A double-axis cylinder 22 is installed in the extension table 11. The telescopic end of the double-axis cylinder 22 can pass through the extension table 11 and extend into the inside of the guiding frame 21. A plate body is arranged on the telescopic end of the double-axis cylinder 22, which is used to push the molding die 100 to adjust its position, facilitating the subsequent magnet embryo filling; The feeding part is arranged on the machine base 1 and is used for storing the magnetic powder required for processing, ensuring that the device has sufficient material storage and guaranteeing the continuity and efficiency of production; The vertical frame 4 is fixedly arranged on the top of the extension table 11. A weighing device 41 fixedly connected and a contact frame 42 in sliding fit are installed at the rear side of the upper end of the vertical frame 4. The contact frame 42 is in contact fit with the detection end of the weighing device 41. A circulation frame 43 communicated with the feeding part is arranged inside the contact frame 42. The circulation frame 43 has a certain capacity and can transfer magnetic powder from the feeding part according to production requirements. And the transferred magnetic powder is accurately weighed by the weighing device 41, so as to realize flexible and accurate control of the material consumption. While ensuring the continuity of the material feeding, the adaptability and flexibility of the whole device processing flow are further improved. A silica gel sleeve 44 with a valve 45 is communicated at the bottom of the circulation frame 43. And a pushing part connected to the end of the silica gel sleeve 44 is arranged inside the circulation frame 43. Since the silica gel sleeve 44 has a certain toughness, it can be bent or deformed under the action of the pushing part, thereby driving the valve 45 to move; Specifically, through the collaborative work of the above-mentioned components, a complete feeding and material conveying process is formed. First, the feeding part stores magnetic powder and conveys a certain amount of magnetic powder to the circulation frame 43 as needed. Then, the weighing device 41 is used to accurately measure the magnetic powder entering the circulation frame 43 to ensure that the subsequent processes can be quantitatively processed and the effective control of the production process is realized. At the same time, under the action of the pushing part, the silica gel sleeve 44 is cooperated to drive the valve 45 to move to adapt to the magnetic powder adding requirements at different positions; In addition, the bottom opening of the circulation frame 43 is designed to be in an inclined state, which not only can improve the fluidity of the magnetic powder and reduce the risk of blockage, but also cooperates with the regulation function of the valve 45 to effectively ensure the accuracy of the added magnetic powder amount. Through the common action of each component, a solid foundation is provided for the subsequent pressing and forming of the magnet embryos, ensuring the consistency and stability of the product quality.

[0030] The telescopic sleeve 5 is connected to the bottom of the circulation frame 43 and wraps the silica gel sleeve 44. The bottom of the telescopic sleeve 5 is connected to a quantitative frame 51. The quantitative frame 51 is internally provided with partition plates 521 distributed at intervals, so that the inside of the quantitative frame 51 is divided into eight compartments. And the bottom of the quantitative frame 51 is arranged with hoppers 52 corresponding to each compartment. The bottom of each hopper 52 is respectively communicated with a material pipe 53. The bottom end of the material pipe 53 is connected to an extrusion end 54. A ball valve 72 rotates inside the extrusion end 54; Specifically, to ensure the quantitative distribution of magnetic powder required for each magnetic embryo, a quantitative frame 51 with internal compartments is specially equipped to quickly connect the magnetic powder inside the circulation frame 43. The incoming magnetic powder is separated by weight by the weighing device 41, and then through the connection and transportation of the hopper 52 and the material pipe 53, the centralized processing of the magnetic powder in the interval is carried out in a continuous manner, and component quantification management is achieved; to further improve the accuracy of quantification, it is allowed that the material pipe 53 and the hopper 52 are made of transparent materials to facilitate the observation of the flow and filling of the magnetic powder. And a weight sensor can be installed inside the material pipe 53 to perform secondary weighing detection on the distributed magnetic powder. At the same time, the weight sensor can be electrically connected to the valve 45 to adjust the opening and closing of the valve 45 in real time according to the actual weighing result, ensuring the consistency and accuracy of the magnetic powder usage in each production link, reducing the quality fluctuations caused by unstable material supply, and realizing more stable neodymium iron boron pressing and forming manufacturing.

[0031] The mounting frame 6 is fixedly arranged at the front side position of the guiding frame 21. The mounting frame 6 is provided with a fixed mold 61 with holes aligned with the extrusion end 54, and an electric slide rail 60 with a slider connected to the quantitative frame 51. The guiding frame 21 is also provided with a double-axis cylinder three 62 with a telescopic end for assembling the moving mold 63. The bottom of the fixed mold 61 has a notch, and the front side of the moving mold 63 is provided with a protrusion that fits the notch. When the moving mold 63 is fitted with the fixed mold 61, the notch is filled by the protruding end after the two fit, so that the bottom of the two is in a closed state to form a complete pressing mold.

[0032] Specifically, after the processes of feeding, transporting, and dividing materials, the quantified magnetic powder is in a non-flowing state under the restriction of the ball valve 72. Then, by controlling the opening of the ball valve 72, the divided magnetic powder at each place is poured into the holes formed by the fitting of the moving mold 63 and the fixed mold 61. The magnetic powder is shaped by the holes between the moving mold 63 and the fixed mold 61 until the magnetic powder is filled. Then, the electric slide rail 60 can be started to drive the extrusion end 54 to press down to compact the loose magnetic powder in each hole, realizing direct and rapid pressing and forming; It can be seen that the extrusion end 54 can not only connect the material transportation between the material pipe 53 and the moving mold 63 and the fixed mold 61, but also integrate the pressing function. Specifically, see Figure 8, the bottom end of the extrusion end 54 is flat and adapted to the hole position of the fixed mold 61, so that when the extrusion end 54 presses down, it can closely fit the hole position formed by the engagement of the moving mold 63 and the fixed mold 61, achieving a more effective pressing effect, and thus forming the magnetic embryo shape of the magnetic powder. Finally, after the pressing is completed, through the flexible adjustment of the double-axis cylinder three 62, the moving mold 63 is separated from the fixed mold 61, providing sufficient moving space for the formed magnetic embryo. At the same time, due to the tendency of the device structure itself to tilt backward (see Figure 3 ), this is more conducive to the movement of the magnetic embryo, enabling it to be smoothly pressed down by the extrusion end 54 and faster separated from the fixed mold 61, thereby reducing the occurrence of adhesion phenomenon, and then entering the forming mold 100 to complete the final assembly. The whole process is continuous and efficient, ensuring the coherence of production and the high quality of products.

[0033] All in all, during the process of processing the pressing and forming of neodymium iron boron, through the high-degree integration of links, the integrated continuous operation from feeding to pressing is realized, effectively reducing the differences caused by step-by-step operations. In addition, the overall structure of the device presents an inclined layout tending to the guiding frame 21, breaking through the limitations of the traditional horizontal mold manufacturing method, making the transportation and transfer of magnetic powder and magnetic embryos more smooth, further optimizing the coherence of the entire production process, and the close connection between each functional module not only makes the operation process more controllable, but also enhances the flexibility and adaptability of the device. In this way, the deficiencies in continuity and quality stability existing in previous manual operations and ordinary machines are effectively solved, ensuring the high efficiency and product quality consistency during the forming process of neodymium iron boron magnetic materials.

[0034] As Figure 1 and Figure 4 shown, the feeding part includes a column 3 arranged on the left side of the top of the machine base 1. A reserve cylinder 31 for storing magnetic powder is arranged at the top end of the column 3. A delivery pump 32 is installed at the bottom opening of the reserve cylinder 31, and the outlet of the delivery pump 32 is connected with a delivery pipe 33 communicating with the circulation frame 43.

[0035] As Figure 5 and Figure 6 shown, the pushing part includes an electric lead screw 431 arranged in the circulation frame 43. A shielding cover 433 covering the electric lead screw 431 is arranged between the left and right inner walls of the circulation frame 43 to block the entry of magnetic powder. A push rod 432 is threadedly arranged on the electric lead screw 431. The push rod 432 moves left and right, and the end of the push rod 432 is connected to the bottom end of the silicone sleeve 44 to push the silicone sleeve 44 to bend and drive the valve 45 to move.

[0036] As Figure 8 and Figure 9As shown in the figure, it further includes a vibration motor 511 provided on the outer wall of the metering box 51. The vibrating end of the vibration motor 511 is connected to a spiral guide rod 512 located inside the metering box 51. The spiral guide rod 512 has branches that are consistent with the number of compartments of the metering box 51, ensuring that each compartment can receive vibration treatment from the spiral guide rod 512 and ensuring the uniformity of vibration conduction. At the end of each branch of the spiral guide rod 512, an extension guide rod 513 extending into the inner part of the material pipe 53 is connected. Through this vibration conduction method, the flow of magnetic powder in each compartment and the material pipe 53 is effectively promoted, preventing material blockage or uneven aggregation, so as to achieve a smoother and more accurate material transmission process.

[0037] As Figures 6-10 shown in the figure, it further includes an adapter frame 7 provided on the top of the fixed mold 61. The adapter frame 7 is provided with through holes that are consistent with the number and layout of the extrusion ends 54. The aperture of the through holes is adapted to the size of the extrusion ends 54. The extrusion ends 54 can slide through the through holes and coincide with the hole positions after the moving mold 63 and the fixed mold 61 are fitted together; both the left and right ends of the ball valve 72 are provided with clamping ends 73 rotatably connected to the corresponding extrusion ends 54. Between two adjacent clamping ends 73 and on the head and tail clamping ends 73, connecting shafts 74 are engaged. On the left and right sides of the extrusion ends 54, one-word grooves 541 that are in abutment and sliding fit with the ends of the corresponding connecting shafts 74 are also provided. And on the left and right sides of the adapter frame 7, drive motors 71 with output ends connected to the adjacent connecting shafts 74 are installed. And the engaging end of the connecting shaft 74 is designed as a one-word convex structure, while the clamping end 73 is provided with a notch adapted to this convex structure. By rotating the ball valve 72, the position of the connecting shaft 74 can be adjusted, resulting in the convex structure on it presenting two states: horizontal and vertical. The horizontal state corresponds to the abutment state of the one-word groove 541, so as to maintain the engagement with the clamping end 73 and achieve the locking of the extrusion end 54. On the contrary, when the convex structure of the connecting shaft 74 is vertical, it is in a sliding state along the one-word groove 541 to release the restriction of the extrusion end 54, enabling it to perform a pressing operation. And as can be seen in Figure 10 it, the bottom end of the ball valve 72 is flat, so that when it is in the closed state, it can closely fit the bottom end of the extrusion end 54, thus ensuring the subsequent pressing effect and enabling the ball valve 72 not to deflect during the pressing process, facilitating the accurate engagement of the clamping end 73 of the ball valve 72 and the connecting shaft 74 during subsequent resetting.

[0038] As Figure 8 and Figure 11As shown, on the bottom of the fixed mold 61, guiding grooves 611 are symmetrically formed on the left and right. A connecting template 612 that abuts and cooperates with the moving mold 63 slides between the guiding grooves 611. The connecting template 612 slides in the front-rear direction. Elastic members 613 are provided between the connecting template 612 and the inner walls of the guiding grooves 611. In this embodiment, the elastic members 613 are springs. When the fixed mold 61 and the moving mold 63 are engaged, the moving mold 63 presses against the connecting template 612, causing the elastic members 613 to be in a compressed state. At the same time, the protruding end of the moving mold 63 closes the notch at the bottom of the fixed mold 61. Once the moving mold 63 is removed, the elastic members 613 will return to their original state, pushing the connecting template 612 to slide back to its original position to fill the notch, thus ensuring the integrity of the fixed mold 61.

[0039] As Figure 2 and Figure 3 shown, it further includes a double-axis cylinder two 23 arranged on the left side at the top of the machine base 1. A plate body is also connected to the telescopic end of the double-axis cylinder two 23. The telescopic end of the double-axis cylinder two 23 can slide through the left side wall of the guiding frame 21. A notch opposite to the telescopic end of the double-axis cylinder two 23 is formed on the guiding frame 21 to push out the formed mold 100 after loading is completed.

[0040] As Figures 4-6 shown, it further includes scraping plates 46 arranged on the left and right sides at the bottom end of the outer shell of the valve 45. When the valve 45 is opened or closed, the scraping plates 46 can effectively scrape off the residual materials attached to the shell of the quantitative frame 51, and at the same time provide a guiding function for the subsequent inflow of magnetic powder.

[0041] When in use, first place the device on a flat ground and fill the storage cylinder 31 with sufficient magnetic powder. Then, place the formed mold 100 on the guiding frame 21 so that it is located on the plate body of the double-axis cylinder one 22. At this time, the moving mold 63 and the fixed mold 61 are in an engaged state. By driving the double-axis cylinder one 22, adjust the position of the formed mold 100 on the guiding frame 21 so that the holes at the bottommost layer of the formed mold 100 are aligned with the holes formed by the engagement between the moving mold 63 and the fixed mold 61.

[0042] Subsequently, start the transfer pump 32 to extract the magnetic powder in the storage cylinder 31 into the circulation frame 43 through the transfer pipe 33. As the magnetic powder continues to be filled, the contact frame 42 together with the circulation frame 43 is pressed against the weighing device 41 to weigh the weight of the added magnetic powder in real time. When the required weight is reached, turn off the transfer pump 32. At this time, the valve 45 is in a closed state, so that the magnetic powder remains inside the circulation frame 43 and the silica gel sleeve 44.

[0043] Next, start the electric lead screw 431. Drive the silicone sleeve 44 to bend and deform through the push rod 432, so as to drive the valve 45 to move, align the valve 45 with a certain compartment of the quantitative frame 51, and place the two side scrapers 46 between the corresponding wall surface and the partition plate 521. Then open the valve 45 to allow the magnetic powder to flow into the specified compartment. At the same time, start the vibration motor 511. Through the vibration cooperation of the spiral guide rod 512 and the extension guide rod 513, ensure that the magnetic powder is evenly distributed in the compartments of the same longitudinal quantitative frame 51, the hopper 52 and the material pipe 53. At this time, the ball valve 72 remains closed. After the magnetic powder fills the corresponding space, the valve 45 can be closed. And so on, drive the push rod 432 through the electric lead screw 431 to drive the valve 45 to move to the next compartment in turn, and repeat the above operation until the magnetic powder in each compartment is filled.

[0044] After completion, start the drive motor 71. Drive the rotation of each ball valve 72 connected by the drive connection shaft 74 through rotation. The convex structure of the connection shaft 74 is placed horizontally and abuts against the one-word groove 541, thereby restricting the movement of the extrusion end 54 on the connection frame 7. Subsequently, the magnetic powder flows into the corresponding holes between the lower fixed mold 61 and the moving mold 63 from each area. At the same time, the vibration motor 511 increases the fluidity of the magnetic powder, thereby assisting the magnetic powder to flow down quickly. After the magnetic powder completely flows in, turn off the vibration motor 511, and start the drive motor 71 again to reverse the ball valve 72 to restore the closed state. The connection shaft 74 rotates accordingly, and the convex structure at its end is placed longitudinally and aligned with the one-word groove 541, so that the end of the connection shaft 74 is in a movable state that can slide along the one-word groove 541.

[0045] Subsequently, start the electric slide rail 60, push the quantitative frame 51 downward, the synchronous telescopic sleeve 5 expands and contracts, and the quantitative frame 51, the hopper 52, the material pipe 53 and the extrusion end 54 move downward synchronously. Since the end of the connection shaft 74 is in a longitudinal state and conforms to the movement of the extrusion end 54, the connection shaft 74 slides along the one-word groove 541 smoothly, so that the connection shaft 74 smoothly disengages from the clamping restriction of the clamping end 73, and at the same time disengages from the extrusion end 54 together to release the locking restriction of the extrusion end 54, so that it can move downward and extend into the hole between the fixed mold 61 and the moving mold 63, thereby extruding and forming the magnetic powder filled inside. After the pressing is completed, start the double-axis cylinder three 62, drive the moving mold 63 to retract, the connecting template 612 is released from the restriction of the moving mold 63, and the elastic member 613 resets, so that the connecting template 612 slides along the guide groove 611 to fill the gap below the fixed mold 61, and the fixed mold 61 is completely opened and presents a complete shape to fill the vacancy below the inner hole of the fixed mold 61, thereby ensuring the integrity of the downward movement path of the formed magnetic embryo. Then, drive the extrusion end 54 to push down again to push the formed magnetic embryo into the lower forming mold 100 to complete the pressing and forming of a row of magnetic powder.

[0046] Subsequently, the first double-axis cylinder 22 is activated, and its telescopic end further retracts, driving the molding die 100 to move downward along the guide frame 21 by a certain distance to align with the next row of hole positions. Repeat the above operations until the molding die 100 is completely filled. At this time, the telescopic end of the first double-axis cylinder 22 is fully retracted, and the molding die 100 loaded with magnetic blanks is located at the bottom of the guide frame 21. Finally, activate the second double-axis cylinder 23 to push the molding die 100 out of the notch of the guide frame 21.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A neodymium-iron-boron forming and pressing device for rare earth permanent magnet materials, comprising: A machine base (1), on the top of which there is an extension table (11); Characterized in that it further comprises: a bracket (2), arranged on the machine base (1), on which there is an inclined guide frame (21) for placing a forming die (100), and a double-axis cylinder one (22) with a telescopic end that can extend into the guide frame (21) is installed in the extension table (11); A feeding part, arranged on the machine base (1); An upright frame (4), arranged on the extension table (11), on which a fixed weighing device (41) and a sliding contact frame (42) are installed, the contact frame (42) is in contact and cooperation with the detection end of the weighing device (41), a circulation frame (43) communicating with the feeding part is arranged inside the contact frame (42), a silica gel sleeve (44) with a valve (45) is communicated at the bottom of the circulation frame (43), and a pushing member connected to the end of the silica gel sleeve (44) is arranged inside the circulation frame (43); A telescopic sleeve (5), connected to the bottom of the circulation frame (43) and covering the silica gel sleeve (44), a quantitative frame (51) with a partition plate (521) is connected to the bottom of the telescopic sleeve (5), the inside of the quantitative frame (51) is divided into multiple compartments, hoppers (52) corresponding to each compartment are arranged at the bottom of the quantitative frame (51) in an array, the bottoms of the hoppers (52) are all communicated with a material pipe (53), the bottom end of the material pipe (53) is connected to an extrusion end (54), and a ball valve (72) rotates inside the extrusion end (54); An installation frame (6), arranged on the guide frame (21), on which a fixed die (61) with a hole position aligned with the extrusion end (54) is arranged, and an electric slide rail (60) with a slider connected to the quantitative frame (51), a double-axis cylinder three (62) with a telescopic end for assembling a moving die (63) is also arranged on the guide frame (21), and the moving die (63) is fitted with the fixed die (61).

2. The neodymium iron boron forming and pressing device for rare earth permanent magnet materials according to claim 1, wherein The feeding part includes a column (3) arranged on the top of the machine base (1), a reserve cylinder (31) for storing magnetic powder is arranged on the column (3), a delivery pump (32) is installed at the bottom opening of the reserve cylinder (31), and the outlet of the delivery pump (32) is connected to a delivery pipe (33) communicating with the circulation frame (43).

3. A neodymium iron boron forming and pressing device for rare earth permanent magnet materials according to claim 2, characterized in that, The pushing member includes an electric lead screw (431) arranged inside the circulation frame (43), a shielding cover (433) covering the electric lead screw (431) is arranged between the inner walls of the circulation frame (43), and a pushing rod (432) is arranged on the electric lead screw (431) in a threaded manner, and the end of the pushing rod (432) is connected to the bottom end of the silica gel sleeve (44) to push the silica gel sleeve (44) to bend and drive the valve (45) to move.

4. A neodymium iron boron forming and pressing device for rare earth permanent magnet materials according to claim 3, wherein It further includes a vibration motor (511) arranged on the outer wall of the quantitative frame (51), the vibration end of the vibration motor (511) is connected to a spiral guide rod (512) located inside the quantitative frame (51), the spiral guide rod (512) has branches consistent with the number of compartments of the quantitative frame (51), and an extension guide rod (513) extending into the inside of the material pipe (53) is connected to the end of each branch of the spiral guide rod (512).

5. The neodymium iron boron forming and pressing device according to claim 4, characterized in that, It further includes an adapter frame (7) arranged on the fixed die (61). Perforations are formed in the adapter frame (7) and are identical to the number and layout of the extrusion ends (54). The extrusion ends (54) slidably pass through the perforations and coincide with the hole positions after the movable die (63) and the fixed die (61) are fitted together. Clamping ends (73) rotatably connected to the corresponding extrusion ends (54) are arranged at both ends of the ball valve (72). A connecting shaft (74) is clamped between adjacent clamping ends (73) and also on the head and tail clamping ends (73). One-word grooves (541) that are abutted against and slidably adapted to the ends of the corresponding connecting shafts (74) are further formed on both sides of the extrusion ends (54). Driving motors (71) with output ends connected to the adjacent connecting shafts (74) are installed on both sides of the adapter frame (7).

6. The neodymium iron boron forming and pressing device for rare earth permanent magnet materials according to claim 5, characterized in that, Guide grooves (611) are symmetrically formed at the bottom of the fixed die (61). An adapter template (612) that abuts against the movable die (63) is slidably arranged between the guide grooves (611). Elastic members (613) are arranged between the adapter template (612) and the inner walls of the guide grooves (611).

7. The neodymium iron boron forming and pressing device according to claim 6, wherein It further includes a double-acting cylinder two (23) arranged on one side of the machine base (1). The telescopic end of the double-acting cylinder two (23) passes through the side wall of the guide frame (21), and a notch opposite to the telescopic end of the double-acting cylinder two (23) is formed in the guide frame (21).

8. A neodymium iron boron forming and pressing device for rare earth permanent magnet materials according to claim 7, characterized in that, It further includes scrapers (46) arranged on both sides of the bottom end of the outer shell of the valve (45).

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