Preparation process and device of neodymium iron boron magnetic rotor

Abstract

The invention discloses a neodymium iron boron magnetic rotor preparation process and a device thereof, and belongs to the technical field of magnetic rotor preparation. Two magnetizing devices (a magnetizing device I and a magnetizing device II) are arranged, and each device is provided with magnetizing assemblies with different sizes, so that the neodymium iron boron magnetic rotor preparation process can adapt to magnetizing of magnet compacts with different sizes, and the magnetizing efficiency and flexibility are improved; the whole magnetizing process is achieved through automatic components such as the air cylinder, the sliding plate and the synchronous frame, dependence of manual operation is greatly reduced, and the magnetizing quality and stability are improved. The connecting plates are connected with the sliding plates, so that the transverse moving frames can move transversely, the longitudinal plates can ascend and descend, and the sliding plates can drive one transverse moving frame to move and can also drive the two transverse moving frames to move.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic rotor preparation, and in particular to a process for preparing a neodymium iron boron magnetic rotor and a device thereof. Background Art

[0002] The rotor of a brushless DC motor is generally composed of permanent magnets, a rotating shaft and bearings. The permanent magnets and magnetic conductive materials together form the rotor magnetic circuit, which is mainly used to generate a sufficiently large magnetic flux in the air gap of the motor so as to interact with the electromagnetic field generated by the current of the stator winding to generate torque. In recent years, sintered NdFeB has made great progress. It can directly prepare the final shape of magnets through mold sintering of powder, making the manufacture of magnetic rotors convenient. In the process of rotor manufacturing, the sintered parts need to be magnetized. If this processing process is operated manually throughout the process, not only the quality and efficiency of magnetization are low, but also safety hazards are prone to occur. Summary of the invention

[0003] The purpose of the present invention is to solve the problem mentioned in the above background technology that in the process of rotor manufacturing, the sintered parts need to be magnetized. If this processing process is entirely performed manually, not only the quality and efficiency of the magnetization are low, but also safety hazards are prone to occur.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A process for preparing a NdFeB magnetic rotor comprises the following steps: S1. Weigh the raw materials according to the proportion and mix them evenly; S2, pressing the mixed powder to obtain a magnet compact; S3, sintering the magnet compact at high temperature; S4, through the extremely strong magnetic electromagnet and additional magnetic pole in the magnetizing machine, a closed magnetic circuit is formed with the magnetized compact to achieve rapid magnetization; S5. Assemble the magnetized compact and the shaft together to form a complete rotor.

[0005] A neodymium iron boron magnetic rotor device includes a magnetizing device 1 and a magnetizing device 2, wherein the magnetizing device 1 and the magnetizing device 2 include a transverse frame that moves laterally and a longitudinal plate that slides on the transverse frame, the longitudinal plate is fixed with a clamping member 1 and a clamping member 2, a magnetizing assembly is arranged on the lower side of the longitudinal plate, and a feeding component is arranged on one side of the magnetizing assembly.

[0006] Preferably, a support platform is fixed at the lower end of the magnetizing component, and the loading component includes a conveying block fixed on the support platform, and a conveying groove is provided on the conveying block.

[0007] Preferably, a baffle is fixed to the end of the conveying trough.

[0008] Preferably, a driving and adjusting device is arranged between the magnetizing device 1 and the magnetizing device 2, and the driving and adjusting device comprises a cylinder 1 and a cylinder 2, a slider is fixed to the protruding end of the cylinder 1, a synchronous frame is connected to the upper side of the slider, the cylinder 2 is fixed to the synchronous frame, a slide plate is fixed to the output end of the cylinder 2, two connecting plates are fixed on each of the two transverse frames, the two connecting plates are respectively located on both sides of the slide plate, and the upper ends of the connecting plates are connected to the slide plate.

[0009] Preferably, a slot is provided on the upper side of the connecting plate, an inner top wall of the slot contacts the upper surface of the slide plate, an inner bottom wall of the slot contacts the lower surface of the slide plate, and a support plate is provided on the transverse frame.

[0010] Preferably, an inserting strip is fixed on both the inner top wall and the inner bottom wall of the card slot, and a slot adapted for the inserting strip is provided on the slide plate.

[0011] Preferably, the connecting plate is slidably connected to the longitudinal plate, a bidirectional screw is rotatably connected to the longitudinal plate, and the bidirectional screw is threadedly connected to the two connecting plates.

[0012] Preferably, an auxiliary mechanism is provided between the connecting plate and the slider, the auxiliary mechanism includes a groove opened on the slider, and plug blocks inserted into the groove are fixed to the opposite surfaces of the two transverse frames, the plug blocks are slidably connected to the transverse frame, a guide plate is fixed to the lower side of the connecting plate, the guide plate is provided with a guide surface, a rod body is fixed on the plug block, the rod body is slidably connected to the transverse frame, a spring is sleeved on the rod body, and both ends of the spring are respectively connected to the rod body and the transverse frame.

[0013] Preferably, a conveyor belt is provided on the support platform, and a storage frame is provided downstream of the conveyor belt.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting up two magnetizing devices (magnetizing device 1 and magnetizing device 2), each device is equipped with magnetizing components of different sizes, which can adapt to magnet compacts of different sizes for magnetizing, thereby improving magnetizing efficiency and flexibility; The entire magnetization process is realized through automatic components such as cylinders, slides, and synchronous racks, which greatly reduces the reliance on manual operations and improves the quality and stability of magnetization. The connection between the connecting plate and the slide can not only make the transverse rack move horizontally, but also make the longitudinal plate move up and down. The slide can move with one transverse rack or two transverse racks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0017] Figure 2 It is a schematic diagram of the conveying block of the present invention.

[0018] Figure 3 It is a schematic diagram of the connecting plate and the sliding plate of the present invention.

[0019] Figure 4 It is a schematic diagram of the auxiliary mechanism of the present invention.

[0020] Figure 5 It is a schematic diagram of the synchronous frame and the slider of the present invention.

[0021] Figure 6 It is a schematic diagram of the transverse frame and the longitudinal plate of the present invention.

[0022] Figure 7 Schematic diagram of the baffle of the present invention.

[0023] Figure 8 It is a schematic diagram of the magnetizing component of the present invention.

[0024] Explanation of the figure numbers: 1. Magnetizing device 1; 2. Magnetizing device 2; 3. Transverse frame; 31. Support plate; 4. Longitudinal plate; 41. Clamping piece 1; 42. Clamping piece 2; 5. Magnetizing assembly; 51. Cylinder 3; 52. Support block; 6. Support table; 61. Conveyor belt; 7. Conveyor block; 71. Baffle; 8. Drive adjustment device; 81. Cylinder 1; 82. Cylinder 2; 83. Slider; 84. Synchronous frame; 85. Slide plate; 851. Slot; 86. Connecting plate; 861. Card slot; 87. Insert strip; 88. Bidirectional screw; 9. Auxiliary mechanism; 91. Groove; 92. Insert block; 93. Guide plate; 94. Rod; 95. Spring. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings.

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0027] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] See also Figure 1 - Figure 8 A process for preparing a NdFeB magnetic rotor comprises the following steps: S1. Weigh the raw materials in proportion and mix them evenly, the raw materials are powder; S2, pressing the mixed powder to obtain a magnet compact; S3, subjecting the magnet green compact to high temperature sintering and forming, and sintering in a permanent magnet vacuum sintering furnace, so that the magnet green compact undergoes a series of physical and chemical changes at high temperature, changes the density and structure of the material, and improves the magnetic properties of the material; S4, through the extremely strong magnetic electromagnet and additional magnetic pole in the magnetizing machine, a closed magnetic circuit is formed with the magnetized compact to achieve rapid magnetization; S5. Assemble the magnetized compact and the shaft together to form a complete rotor.

[0030] A NdFeB magnetic rotor device comprises a magnetizing device 1 and a magnetizing device 2, wherein the magnetizing device 1 and the magnetizing device 2 comprise a transversely movable frame 3 and a longitudinal plate 4 sliding on the transverse frame, the longitudinal plate 4 being fixed with a clamping piece 41 and a clamping piece 42, a magnetizing assembly 5 being arranged on the lower side of the longitudinal plate 4, a support platform 6 being fixed on the lower end of the magnetizing assembly 5, the transverse frame 3 being slidably connected with the support platform 6, the magnetizing assemblies 5 in the magnetizing device 1 and the magnetizing device 2 being of different sizes, four magnetizing assemblies 5 being arranged, two in a group, and the magnetizing assemblies 5 in a group being of the same size, the magnetizing assembly 5 being of the prior art, a magnet compact needs to enter the interior of the magnetizing assembly 5, a cylinder 3 51 is arranged on the support platform 6, a support block 52 is fixed on the protruding end of the cylinder 3 51, the magnet compact falls on the support block 52, and then the cylinder 3 51 causes the support block 52 to descend, thereby causing the magnet compact to enter the interior of the magnetizing assembly 5 for magnetization.

[0031] A feeding component is provided on one side of the magnetizing component 5, and the feeding component includes a conveying block 7 fixed on the support platform 6, and a conveying trough is provided on the conveying block 7, and the conveying trough is connected to the vibration disk, and the sintered magnet green sheet is placed in the vibration disk, and then enters into the conveying trough. The vibrating disk feeding is a prior art, which is not described again and is not shown in the figure. A baffle 71 is fixed at the end of the conveying trough, and the baffle 71 helps to block the magnet green sheet. There are two clamping members 41 and two clamping members 42 on a longitudinal plate 4, and the clamping member 41 and the clamping member 42 are both composed of a cylinder and a clamping plate.

[0032] A driving and adjusting device 8 is arranged between the magnetizing device 1 and the magnetizing device 2. The driving and adjusting device 8 comprises a cylinder 1 81 and a cylinder 2 82. A slider 83 is fixed to the protruding end of the cylinder 1 81. The slider 83 is slidably connected to the support platform 6. The slider 83 can pass between the two transverse frames 3. A synchronous frame 84 is connected to the upper side of the slider 83. The cylinder 2 82 is fixed to the synchronous frame 84. A slide plate 85 is fixed to the output end of the cylinder 2 82. The synchronous frame 84 is higher than the transverse frame 3. The slide plate 85 is slidably connected to the synchronous frame 84. The slide plate 85 slides longitudinally. Two connecting plates 86 are fixed to the two transverse frames 3. The two connecting plates 86 are respectively located on both sides of the slide plate 85. The two connecting plates 86 are symmetrically arranged. The upper end of the connecting plate 86 is connected to the slide plate 85. The connecting plate 86 can both make the transverse frame 3 move laterally and make the longitudinal plate 4 rise and fall.

[0033] A slot 861 is provided on the upper side of the connecting plate 86, and the inner top wall of the slot 861 contacts the upper surface of the slide 85. After the connecting plate 86 clamps the slide 85, the longitudinal plate 4 can be lifted up and down. The two connecting plates 86 increase the stability of the connection with the slide 85. The inner bottom wall of the slot 861 contacts the lower surface of the slide 85. A support plate 31 is provided on the transverse frame 3 to prevent the longitudinal plate 4 from falling.

[0034] Insertion strips 87 are fixed to the inner top wall and the inner bottom wall of the slot 861 , and a slot 851 adapted to the insertion strip 87 is provided on the slide plate 85 , and the cooperation between the insertion strip 87 and the slot 851 further increases stability.

[0035] The connecting plate 86 is slidably connected to the longitudinal plate 4, and the connecting plate 86 moves stably in a straight line on the longitudinal plate 4, and is connected to the slide plate 85 by sliding the connecting plate 86 on the longitudinal plate 4. A bidirectional screw 88 is rotatably connected to the longitudinal plate 4, and the bidirectional screw 88 is threadedly connected to the two connecting plates 86. The bidirectional screw 88 is used to control the two connecting plates 86 to move closer or farther from each other. Depending on the situation, the slide plate 85 can move with one transverse frame 3, or it can move with two transverse frames 3.

[0036] An auxiliary mechanism 9 is provided between the connecting plate 86 and the slider 83. The auxiliary mechanism 9 is used to increase the stability of the transverse frame 3. The auxiliary mechanism 9 includes a groove 91 provided on the slider 83. The opposite surfaces of the two transverse frames 3 are fixed with plug blocks 92 inserted into the groove 91. The plug blocks 92 are slidably connected with the transverse frame 3. A guide plate 93 is fixed to the lower side of the connecting plate 86. The guide plate 93 is provided with a guide surface. A rod body 94 is fixed on the plug block 92. The rod body 94 is slidably connected with the transverse frame 3. A spring 95 is sleeved on the rod body 94. Two rod bodies 94 are connected to one plug block 92. The two ends of the spring 95 are respectively connected to the rod body 94 and the transverse frame 3. The plug block 92 has an inclined surface. The guide surface cooperates with the inclined surface to make the plug block 92 descend.

[0037] A conveyor belt 61 is provided on the support platform 6. The conveyor belt 61 is prior art. A storage frame is provided downstream of the conveyor belt 61. The magnetized magnet compact is placed on the conveyor belt 61 through a clamping plate and then falls into the storage frame.

[0038] When the two transverse frames 3 are connected to the slide plate 85, the slide plate 85 is at the lowest end. By rotating the two bidirectional screws 88, the two connecting plates 86 on the longitudinal plate 4 are close to each other. After the connecting plate 86 clamps the slide plate 85, the inserting strip 87 is also inserted into the slot 851. At this time, the slide plate 85, the connecting plate 86 and the longitudinal plate 4 are fixed together. When the connecting plate 86 moves, the guide plate 93 moves together. The guide surface of the guide plate 93 contacts the inclined surface of the insert block 92, so that the insert block 92 moves down into the groove 91. The insert block 92 moves down with the rod body 94, the spring 95 is compressed, and the insert block 92 moves in. After entering the groove 91, the two transverse frames 3 move in unison. During the magnetization process, the cylinder 1 81 extends, the slider 83 moves, the slider 83 moves with the two transverse frames 3 and the synchronous frame 84, the synchronous frame 84 moves with the slide plate 85 and the cylinder 2 82, the transverse frame 3 moves with the longitudinal plate 4, the longitudinal plate 4 moves with the clamping member 1 41 and the clamping member 2 42, so that the clamping member 1 41 is located on the upper side of the conveying block 7, and the clamping member 1 41 is located on the upper side of the magnetization component 5, and then the cylinder 2 82 makes the slide plate 85 descend, and the slide plate 85 descends with the longitudinal plate 4 through the connecting plate 86, and the longitudinal plate 4 moves with the clamping member 1 41 and the clamping member 2 42. The cylinder in the clamping member 41 clamps the magnet compact before magnetization through the clamping plate, and the cylinder in the clamping member 42 clamps the magnet compact after magnetization through the clamping plate, then the cylinder 82 makes the slide plate 85 rise, the slide plate 85 rises with the longitudinal plate 4 through the connecting plate 86, the longitudinal plate 4 brings the clamping member 41 and the clamping member 42, then the protruding end of the cylinder 81 returns, the slide block 83 returns, the slide block 83 brings the synchronous frame 84 and the transverse frame 3 back, and when the clamping member 41 moves to the top of the magnetizing component 5, it stops, then the protruding end of the cylinder 82 descends, and the slide block 83 returns. Plate 85, connecting plate 86, longitudinal plate 4, clamping member 1 41 and clamping member 2 42 descend together, the cylinder in clamping member 1 41 loosens the magnet compact before magnetization through the clamping plate, and then the magnet compact enters the magnetizing component 5 for magnetization, and the cylinder in clamping member 2 42 loosens the magnet compact after magnetization through the clamping plate, and the magnet compact after magnetization falls on the conveyor belt 61 and finally falls into the storage frame, and then the protruding end of cylinder 2 82 rises, the slide plate 85, connecting plate 86, longitudinal plate 4, clamping member 1 41 and clamping member 2 42 rise together, and the protruding end of cylinder 1 81 extends again to carry out the next work.

[0039] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A process for preparing a NdFeB magnetic rotor, characterized in that: The following steps are included S1. Weigh the raw materials according to the proportion and mix them evenly; S2, pressing the mixed powder to obtain a magnet compact; S3, sintering the magnet compact at high temperature; S4, through the extremely strong magnetic electromagnet and additional magnetic pole in the magnetizing machine, a closed magnetic circuit is formed with the magnetized compact to achieve rapid magnetization; S5. Assemble the magnetized compact and the shaft together to form a complete rotor.

2. A NdFeB magnetic rotor device according to claim 1, characterized in that: The invention comprises a magnetizing device 1 (1) and a magnetizing device 2 (2), wherein the magnetizing device 1 (1) and the magnetizing device 2 (2) comprise a transverse frame (3) that moves transversely and a longitudinal plate (4) that slides on the transverse frame, wherein the longitudinal plate (4) is fixed with a clamping member 1 (41) and a clamping member 2 (42), a magnetizing component (5) is arranged on the lower side of the longitudinal plate (4), and a feeding component is arranged on one side of the magnetizing component (5).

3. A NdFeB magnetic rotor device according to claim 2, characterized in that: A support platform (6) is fixed at the lower end of the magnetizing component (5), and the loading component comprises a conveying block (7) fixed on the support platform (6), and a conveying groove is provided on the conveying block (7).

4. A NdFeB magnetic rotor device according to claim 3, characterized in that: A baffle (71) is fixed to the end of the conveying trough.

5. A NdFeB magnetic rotor device according to claim 4, characterized in that: A driving and adjusting device (8) is provided between the magnetizing device 1 (1) and the magnetizing device 2 (2), and the driving and adjusting device (8) comprises a cylinder 1 (81) and a cylinder 2 (82), a slider (83) being fixed to the protruding end of the cylinder 1 (81), a synchronous frame (84) being connected to the upper side of the slider (83), the cylinder 2 (82) being fixed to the synchronous frame (84), a slide plate (85) being fixed to the output end of the cylinder 2 (82), two connecting plates (86) being fixed to each of the two transverse frames (3), the two connecting plates (86) being respectively located on both sides of the slide plate (85), and the upper ends of the connecting plates (86) being connected to the slide plate (85).

6. A NdFeB magnetic rotor device according to claim 5, characterized in that: A slot (861) is provided on the upper side of the connecting plate (86), the inner top wall of the slot (861) contacts the upper surface of the slide plate (85), and the inner bottom wall of the slot (861) contacts the lower surface of the slide plate (85), and a support plate (31) is provided on the transverse moving frame (3).

7. A NdFeB magnetic rotor device according to claim 6, characterized in that: Insertion strips (87) are fixed on the inner top wall and the inner bottom wall of the slot (861), and a slot (851) adapted to fit the insertion strip (87) is provided on the slide plate (85).

8. A NdFeB magnetic rotor device according to claim 7, characterized in that: The connecting plate (86) is slidably connected to the longitudinal plate (4), a bidirectional screw rod (88) is rotatably connected to the longitudinal plate (4), and the bidirectional screw rod (88) is threadedly connected to the two connecting plates (86).

9. A NdFeB magnetic rotor device according to claim 8, characterized in that: An auxiliary mechanism (9) is provided between the connecting plate (86) and the slider (83), the auxiliary mechanism (9) comprising a groove (91) provided on the slider (83), an insert block (92) inserted into the groove (91) is fixed to opposite surfaces of the two transverse frames (3), the insert block (92) is slidably connected to the transverse frame (3), a guide plate (93) is fixed to the lower side of the connecting plate (86), the guide plate (93) is provided with a guide surface, a rod body (94) is fixed to the insert block (92), the rod body (94) is slidably connected to the transverse frame (3), a spring (95) is sleeved on the rod body (94), and two ends of the spring (95) are respectively connected to the rod body (94) and the transverse frame (3).

10. A NdFeB magnetic rotor device according to claim 9, characterized in that: A conveyor belt (61) is provided on the support platform (6), and a storage frame is provided downstream of the conveyor belt (61).

Images