A rare earth permanent magnet production process and equipment

Abstract

The invention discloses a rare earth permanent magnet production process and equipment, belonging to the field of rare earth permanent magnet die-casting; the production equipment comprises a bottom plate, a support plate capable of being raised and lowered is arranged on the upper end of the bottom plate, a plurality of through slots are provided on the support plate, a plurality of lower modules corresponding to the through slots and cooperating with each other are fixed on the upper end of the bottom plate, the upper end surface of the lower module and the side wall of the through slot form a mold cavity for placing rare earth powder; a support frame is arranged on the upper end of the bottom plate, a lifting plate capable of being raised and lowered is arranged on the support frame, a plurality of pressure heads corresponding to the through slots and cooperating with each other are arranged on the lower end of the lifting plate; a sliding plate capable of sliding is arranged on the support frame, a connecting frame capable of being raised and lowered is arranged below the sliding plate, a plurality of clamping components corresponding to the lower modules one by one are arranged on the connecting frame; a mounting frame is fixed on the connecting frame, a plurality of water pipes are arranged on the mounting frame, and high-pressure nozzles are arranged at the ends of the water pipes to flush the support plate and the lower modules.

Description

Technical Field

[0001] The invention belongs to the field of die-casting of rare earth permanent magnets, and in particular relates to a production process and equipment of rare earth permanent magnets. Background Art

[0002] Rare earth permanent magnets are mostly produced by die-casting. During production, rare earth powder is added to a mold cavity and then extruded by die-casting to form a permanent magnet of a specific shape. After that, it is polished, cleaned and magnetized to form the final magnetic rare earth permanent magnet. However, during the die-casting process of the permanent magnet, when the permanent magnet is taken out after forming, some rare earth powder will adhere to the mold cavity. In order to ensure the die-casting quality of the subsequent permanent magnet, it needs to be cleaned in time. For this purpose, a rare earth permanent magnet production equipment is proposed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a rare earth permanent magnet production process and equipment to solve the problems in the prior art.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A rare earth permanent magnet production device comprises a bottom plate, a support plate capable of being raised and lowered is arranged on the upper end of the bottom plate, a plurality of through slots are provided on the support plate, a plurality of lower modules corresponding to the through slots and cooperating with each other are fixed on the upper end of the bottom plate, and the upper end surface of the lower module and the side wall of the through slot form a mold cavity for placing rare earth powder; a support frame is arranged on the upper end of the bottom plate, a lifting plate capable of being raised and lowered is arranged on the support frame, and a plurality of pressing heads corresponding to the through slots and cooperating with each other are arranged on the lower end of the lifting plate;

[0006] A sliding plate capable of sliding is arranged on the support frame, a lifting and lowering connecting frame is arranged below the sliding plate, and a plurality of clamping components corresponding to the lower modules are arranged on the connecting frame to clamp the permanent magnets on the plurality of lower modules respectively;

[0007] A mounting frame is fixed on the connecting frame, and a plurality of water pipes are arranged on the mounting frame. High-pressure nozzles are arranged at the ends of the water pipes to flush the support plate and the lower module.

[0008] Furthermore, the sliding plate is slidably connected to the support frame, two first fixed plates are arranged on the support frame, a rotatable first screw rod is arranged between the two first fixed plates, and the first screw rod passes through the sliding plate and is threadedly connected thereto.

[0009] Furthermore, the thread lead angle of the first screw is smaller than the equivalent friction angle;

[0010] Furthermore, a locking assembly is provided on the support frame, and the locking assembly includes a lifting rod, and a third fixed plate is provided on one side of the support frame. The lifting rod passes through the third fixed plate in a vertical direction and is slidably connected with the third fixed plate. A clamping block is provided at the lower end of the lifting rod, and a spring is sleeved on the lifting rod. Both ends of the spring are in contact with the third fixed plate and the clamping block respectively. Under the elastic force of the spring, the clamping block can engage with the spiral groove of the first screw rod.

[0011] Furthermore, a fixing rod is provided at the upper end of the lifting rod, and the lifting plate can contact with the fixing rod during the lifting process, and drive the lifting rod to rise;

[0012] When the lifting plate rises to the highest point, the block leaves the first screw rod and does not block the sliding of the sliding plate; when the lifting plate is in the die-casting position, the lifting plate does not contact the fixed rod, and the block can engage with the spiral groove of the first screw rod.

[0013] Furthermore, the clamping assembly includes a mounting plate fixed to the connecting frame, and two clamping plates capable of synchronously sliding in opposite directions are arranged on the mounting plate. The two clamping plates can be synchronously approached to clamp the permanent magnet on the lower module.

[0014] Furthermore, the two clamps are both slidably connected to the mounting plate, two second fixed plates are provided at the upper end of the mounting plate, a rotatable second screw rod is provided between the two second fixed plates, and the two ends of the second screw rod are respectively provided with a first external thread and a second external thread with opposite rotation directions and equal pitches, the first external thread and the second external thread respectively pass through the two clamps and are threadedly connected thereto.

[0015] Furthermore, the thread lead angles of the first external thread and the second external thread are both smaller than the equivalent friction angle.

[0016] Furthermore, a cylinder is fixed on the sliding plate to drive the connecting frame to rise and fall.

[0017] Furthermore, the upper end of the lower module is provided with a first arc surface, the lower end of the pressing head is provided with a second arc surface, and an arc-shaped permanent magnet can be die-cast.

[0018] Beneficial effects of the present invention:

[0019] 1. A support plate that can be raised and lowered is provided, and a lower module is provided on the bottom plate to slide in the through slot of the support plate. A mold cavity for placing rare earth powder is formed between the side wall of the through slot and the upper end surface of the lower module. Under the die-casting action of the die-casting assembly, the die-casting of the permanent magnet is realized. By controlling the support plate to descend, the permanent magnet in the through slot can be ejected, and the material is removed under the action of the material removal mechanism.

[0020] 2. A cleaning mechanism is provided on the connecting frame of the material taking mechanism to flush the lower module and the support plate, and as the connecting frame moves, the rare earth powder can be fully cleaned.

[0021] 3. By setting a locking assembly on one side of the support frame, the movement timing of the material picking mechanism is controlled to ensure that the material picking mechanism cannot move during the die-casting operation. When the lifting plate returns to the highest point in the die-casting assembly, the movement of the material picking mechanism will not be restricted. The mechanical protection mechanism is used to prevent collisions. Compared with the prior art that only uses programs to control the timing of motor rotation, the protection mechanism is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the production equipment of the present invention;

[0024] Figure 2 It is a schematic diagram of the support assembly structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the die-casting assembly of the present invention;

[0026] Figure 4 It is a schematic diagram of the lower module structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the pressure head structure of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the material taking mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the clamping assembly of the present invention;

[0030] Figure 8 It is a schematic diagram of the cleaning component structure of the present invention;

[0031] Fig. 9 It is a schematic diagram of the locking assembly structure of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, a rare earth permanent magnet production equipment includes a base plate 1, and a support component 2 and a die-casting component 3 are arranged on the upper end of the base plate 1. Rare earth powder is placed in the inner mold cavity of the support component 2. Under the meshing action of the die-casting component 3, a permanent magnet of a specific shape can be formed. After that, it is polished, cleaned and magnetized to complete the production of the rare earth permanent magnet.

[0034] like Figure 2 As shown, the support assembly 2 includes a support plate 21 disposed above the base plate 1 and capable of being raised and lowered, a plurality of through slots 211 are provided on the support plate 21, a plurality of lower modules 23 corresponding to and cooperating with the through slots 211 are fixed to the upper end of the base plate 1, and a mold cavity is formed between the upper end surface of the lower module 23 and the side wall of the through slot 211 for placing rare earth powder;

[0035] A first oil cylinder 22 is disposed at the upper end of the bottom plate 1, and the end of the driving shaft of the first oil cylinder 22 is fixed to the support plate 21, so that the height of the support plate 21 can be adjusted. When the lower module 23 of the support plate 21 is controlled to be lowered beyond the upper end surface of the support plate 21, the permanent magnet after die-casting can be pushed out of the through slot 211 to facilitate material removal;

[0036] In the present embodiment, the number of the through slots 211 and the number of the lower modules 23 are both four. Of course, in some embodiments, the number of the through slots 211 and the number of the lower modules 23 may also be two, three or more than four.

[0037] like Figure 3 As shown, the die-casting assembly 3 includes a support frame 31 fixed to the upper end of the base plate 1, and a lifting plate 33 capable of lifting and lowering is arranged on the support frame 31, and a plurality of pressing heads 34 are arranged at the lower end of the lifting plate 33, and the pressing heads 34 correspond to the through grooves 211 one by one and can cooperate with each other, so that the rare earth powder located in the mold cavity (formed by the upper end surface of the lower module 23 and the side wall of the through groove 211) can be die-casted;

[0038] In this embodiment, a second oil cylinder 32 is provided on the support frame 31, and the end of the driving shaft of the second oil cylinder 32 is fixedly connected to the lifting plate 33, thereby driving the lifting plate 33 to move up and down to complete the die-casting operation; of course, the method of driving the lifting plate 33 to move up and down includes but is not limited to the second oil cylinder 32 in this embodiment. In some embodiments, the lifting plate 33 can also be driven to move up and down by setting linear driving components such as hydraulic cylinders and air cylinders.

[0039] In addition, in this embodiment, Figure 4 and Figure 5 As shown, the upper end of the lower module 23 is provided with a first arc surface 231 , and the lower end of the pressing head 34 is provided with a second arc surface 341 . The first arc surface 231 and the second arc surface 341 can die-cast an arc-shaped permanent magnet.

[0040] The support frame 31 is provided with a connecting plate 35, and the connecting plate 35 is provided with a material taking mechanism 4, which can clamp and unload the permanent magnet pushed out of the through slot 211 by the lower module 23 after the die casting is completed;

[0041] like Figure 6 and Figure 7 As shown, the material taking mechanism 4 includes a sliding plate 41 that can slide along the length direction of the connecting plate 35, a connecting frame 43 is arranged below the sliding plate 41, a cylinder 42 is fixed on the sliding plate 41, and the end of the driving shaft of the cylinder 42 is fixed to the connecting frame 43 to drive the connecting frame 43 to rise and fall; a plurality of clamping components 44 are arranged on the connecting frame 43, and the clamping components 44 correspond to the lower modules 23 one by one, and can clamp the permanent magnets on the plurality of lower modules 23 respectively, and the permanent magnets can be taken out with the lifting and lowering of the connecting frame 43 and the sliding of the sliding plate 41;

[0042] In this embodiment, the sliding plate 41 is slidably connected to the connecting plate 35, and two first fixing plates 36 are provided on the connecting plate 35. A first screw rod 45 is rotatably connected between the two first fixing plates 36. The first screw rod 45 penetrates the sliding plate 41 and is threadedly connected thereto. By providing a motor on one of the first fixing plates 36 to drive the first screw rod 45 to rotate, the sliding of the sliding plate 41 can be adjusted. At the same time, in order to ensure that the sliding position of the sliding plate 41 remains stable after adjustment, the first screw rod 45 needs to have self-locking properties, that is, the thread lead angle of the first screw rod 45 is less than the equivalent friction angle.

[0043] Of course, the method of driving the sliding plate 41 to slide along the length direction of the connecting plate 35 includes but is not limited to the structure of the first screw rod 45 in this embodiment. In some embodiments, the sliding plate 41 can also be directly driven to slide by setting a linear driving component such as a telescopic rod on the connecting plate 35.

[0044] like Figure 7 As shown, the clamping assembly 44 includes a mounting plate 441 fixed to the connecting frame 43, and two clamping plates 442 capable of synchronously sliding in opposite directions are arranged on the mounting plate 441. The two clamping plates 442 are synchronously approached to clamp the permanent magnet on the lower module 23;

[0045] In this embodiment, the two clamping plates 442 are both slidably connected to the mounting plate 441, and two second fixing plates 4411 are provided at the upper end of the mounting plate 441, and a second screw rod 443 is rotatably connected between the two second fixing plates 4411, and the two ends of the second screw rod 443 are respectively provided with a first external thread 4431 and a second external thread 4432 of opposite rotation directions and equal pitches, and the first external thread 4431 and the second external thread 4432 respectively penetrate the two clamping plates 442 and are threadedly connected thereto, and by providing a motor on one of the second fixing plates 4411 to drive the second screw rod 443 to rotate, the two clamping plates 442 can be synchronously slid in the opposite directions to achieve the clamping and loosening of the permanent magnet;

[0046] Furthermore, in order to ensure the stability of clamping the permanent magnet, the second screw rod 443 needs to have a self-locking property, that is, the thread lead angles of the first external thread 4431 and the second external thread 4432 are both smaller than the equivalent friction angle.

[0047] Of course, the method of driving the two clamping plates 442 to slide synchronously in the opposite directions includes but is not limited to the second screw rod 443 and other structures in this embodiment. In some embodiments, two cylinders can also be set on the mounting plate 441 to simultaneously drive the two clamping plates 442 to slide in the opposite directions.

[0048] A cleaning assembly 5 is provided on the connecting frame 43, such as Figure 8 As shown, the cleaning assembly 5 includes a mounting frame 51 fixed on the connecting frame 43, and a plurality of water pipes 52 are fixed on the mounting frame 51. A high-pressure nozzle is provided at the end of the water pipe 52, and the water pipe 52 is connected to a water pump. When the permanent magnet is clamped, the water pump is turned on, and as the connecting frame 43 slides beyond the outer side, the high-pressure nozzle can flush the lower module 23 and the support plate 21 (the rare earth powder on the inner wall of the through groove 211 is scraped to the upper end of the support plate 21 by the lower module 23), thereby achieving the purpose of cleaning the rare earth powder;

[0049] It is worth mentioning that the cleaning component 5 is installed on the connecting frame 43 in order to fully flush the entire support plate 21 and all lower modules 23 with the help of the movement of the connecting frame 43; and the movement of the connecting frame 43 occurs during the unloading process, and the lower module 23 needs to extend out of the through groove 211 during the unloading process. At this time, the cleaning component fixed on the connecting frame 43 can easily flush the lower module 23.

[0050] It should be noted that when the material taking mechanism 4 is moving, if the die casting assembly 3 is still in the die casting operation, the material taking mechanism 4 and the cleaning assembly 5 will collide with the relevant components in the die casting assembly 3; therefore, it is necessary to control the movement timing of the material taking mechanism 4: to ensure that the material taking mechanism 4 cannot move during the die casting operation, and when the lifting plate 33 in the die casting assembly 3 returns to the highest point (initial position), the movement of the material taking mechanism 4 will not be restricted; for this reason, in this embodiment, a locking assembly 6 is provided on the support frame 31 to realize the above-mentioned timing control;

[0051] like Fig. 9 As shown, the locking assembly 6 includes a lifting rod 61, a third fixing plate 37 is provided on one side of the support frame 31, the lifting rod 61 passes through the third fixing plate 37 along the vertical direction and is slidably connected thereto, a clamping block 62 is provided at the lower end of the lifting rod 61, a spring 63 is sleeved on the lifting rod 61, and the two ends of the spring 63 are respectively in contact with the third fixing plate 37 and the clamping block 62, and under the elastic force of the spring 63, the clamping block 62 can be engaged with the spiral groove of the first screw rod 45, thereby locking the first screw rod 45 and limiting the sliding of the material taking mechanism 4;

[0052] In addition, a fixing rod 64 is provided at the upper end of the lifting rod 61. The lifting plate 33 can contact the fixing rod 64 during the rising process and drive the lifting rod 61 to rise; when the lifting plate 33 rises to the highest point, the block 62 leaves the first screw rod 45, and the block 62 will not block the sliding of the sliding plate 41; and when the die-casting component 3 performs the die-casting operation, the lifting plate 33 does not contact the fixing rod 62. At this time, the block 62 can engage with the spiral groove of the first screw rod 45, thereby realizing the control of the above-mentioned timing and achieving the purpose of mechanical protection. Compared with the prior art that only uses the program to control the timing of motor rotation, the protection mechanism is more reliable.

[0053] Working principle:

[0054] By setting a support plate 21 that can be raised and lowered, a lower module 23 is set on the bottom plate 1 to slide in the through groove 211 of the support plate, and a mold cavity for placing rare earth powder is formed between the side wall of the through groove 211 and the upper end surface of the lower module 23, and the die-casting of the permanent magnet is achieved under the die-casting action of the die-casting component 3; by controlling the support plate 21 to descend, the permanent magnet in the through groove 211 can be ejected, and the material is taken under the action of the material taking mechanism 4; and by setting a cleaning component 5 on the connecting frame 43 of the material taking mechanism 4, the lower module 23 and the support plate 21 are flushed, and as the connecting frame 43 moves, the purpose of fully cleaning the rare earth powder can be achieved. By setting a locking assembly 6 on one side of the support frame 31, the movement timing of the material picking mechanism 4 is controlled to ensure that the material picking mechanism 4 cannot move during the die-casting operation. When the lifting plate 33 in the die-casting assembly 3 returns to the highest point, the movement of the material picking mechanism 4 will not be restricted. The mechanical protection mechanism is used to prevent collisions. Compared with the prior art that only uses a program to control the timing of motor rotation, the protection mechanism is more reliable.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A rare earth permanent magnet production device, comprising a base plate (1), characterized in that: A support plate (21) capable of being raised and lowered is arranged at the upper end of the bottom plate (1), a plurality of through slots (211) are provided on the support plate (21), a plurality of lower modules (23) corresponding one-to-one with the through slots (211) and cooperating with each other are fixed to the upper end of the bottom plate (1), and the upper end surface of the lower module (23) and the side wall of the through slot (211) form a mold cavity for placing rare earth powder; a support frame (31) is arranged at the upper end of the bottom plate (1), a lifting plate (33) capable of being raised and lowered is arranged on the support frame (31), and a plurality of pressure heads (34) corresponding one-to-one with the through slots (211) and cooperating with each other are arranged at the lower end of the lifting plate (33); A sliding plate (41) capable of sliding is arranged on the support frame (31), a lifting connection frame (43) capable of lifting is arranged below the sliding plate (41), and a plurality of clamping assemblies (44) corresponding to the lower modules (23) are arranged on the connection frame (43) to respectively clamp the permanent magnets on the plurality of lower modules (23); A mounting frame (51) is fixed on the connecting frame (43), a plurality of water pipes (52) are arranged on the mounting frame (51), and high-pressure nozzles are arranged at the ends of the water pipes (52) to flush the support plate (21) and the lower module (23); The sliding plate (41) is slidably connected to the support frame (31); two first fixing plates (36) are arranged on the support frame (31); a rotatable first screw rod (45) is arranged between the two first fixing plates (36); the first screw rod (45) passes through the sliding plate (41) and is threadedly connected thereto; The support frame (31) is provided with a locking assembly (6), the locking assembly (6) comprising a lifting rod (61), a third fixing plate (37) is provided on one side of the support frame (31), the lifting rod (61) passes through the third fixing plate (37) in a vertical direction and is slidably connected thereto, a clamping block (62) is provided at the lower end of the lifting rod (61), a spring (63) is sleeved on the lifting rod (61), two ends of the spring (63) are respectively in contact with the third fixing plate (37) and the clamping block (62), and under the elastic force of the spring (63), the clamping block (62) can be clamped with the spiral groove of the first screw rod (45); A fixing rod (64) is provided at the upper end of the lifting rod (61), and the lifting plate (33) can contact the fixing rod (64) during the lifting process, thereby driving the lifting rod (61) to rise; When the lifting plate (33) rises to the highest point, the block (62) leaves the first screw rod (45), and the block (62) will not block the sliding of the sliding plate (41); and when the lifting plate (33) is in the die-casting position, the lifting plate (33) does not contact the fixed rod (64), and the block (62) can engage with the spiral groove of the first screw rod (45).

2. A rare earth permanent magnet production equipment according to claim 1, characterized in that: The thread lead angle of the first screw rod (45) is smaller than the equivalent friction angle.

3. The rare earth permanent magnet production equipment according to claim 1, characterized in that: The clamping assembly (44) comprises a mounting plate (441) fixed to the connecting frame (43); two clamping plates (442) capable of synchronously sliding in opposite directions are arranged on the mounting plate (441); the two clamping plates (442) are synchronously approached to clamp the permanent magnet on the lower module (23).

4. A rare earth permanent magnet production equipment according to claim 3, characterized in that: The two clamping plates (442) are both slidably connected to the mounting plate (441); two second fixing plates (4411) are arranged at the upper end of the mounting plate (441); a rotatable second screw rod (443) is arranged between the two second fixing plates (4411); two ends of the second screw rod (443) are respectively provided with a first external thread (4431) and a second external thread (4432) with opposite rotation directions and equal pitches; the first external thread (4431) and the second external thread (4432) respectively penetrate the two clamping plates (442) and are threadedly connected thereto.

5. A rare earth permanent magnet production equipment according to claim 4, characterized in that: The thread lead angles of the first external thread (4431) and the second external thread (4432) are both smaller than the equivalent friction angle.

6. The rare earth permanent magnet production equipment according to claim 1, characterized in that: A cylinder (42) is fixed on the sliding plate (41) to drive the connecting frame (43) to rise and fall.

7. The rare earth permanent magnet production equipment according to claim 1, characterized in that: The upper end of the lower module (23) is provided with a first arc surface (231), and the lower end of the pressing head (34) is provided with a second arc surface (341), and an arc-shaped permanent magnet can be die-cast.

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