A production and processing device and method for sintered NdFeB workpiece

Abstract

The present invention discloses a production and processing device and method for sintered NdFeB workpieces, belonging to the technical field of sintering equipment. A production and processing device for sintered NdFeB workpieces, comprising a first base, and also comprising: an installation box fixedly connected to the first base, wherein the installation box is provided with a first loading chamber, a sintering chamber, and a second loading chamber that are interconnected from left to right; the present invention enables the fixed part of the fixed workpiece to drive the workpiece to flip inside the sintering chamber, so that the upper and lower ends of the workpiece can absorb heat evenly, so that the workpiece is heated more evenly, thereby improving the quality of the sintered workpiece, and preheating the workpiece before sintering by utilizing the heat emitted by the workpiece after sintering, thereby saving heat energy waste and reducing energy loss, and exchanging loading and unloading through two loading chambers, so that the workpiece replacement and preheating are completed during the sintering process, thereby improving the overall sintering efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering equipment, and in particular to a production and processing device and method for sintering NdFeB workpieces. Background Art

[0002] The sintering equipment is a process that fixes the NdFeB magnet workpiece on a supporting device after processing and finalizing it, and then puts it into a sintering furnace for sintering, which reduces the pores between the NdFeB magnet crystals and increases the density between the NdFeB magnet crystals, thereby obtaining a polycrystalline dense body to improve the performance of the NdFeB magnet.

[0003] In the prior art, during sintering, the heat source radiates heat from the wall of the sintering tube to the axis of the tube. The closer to the wall, the higher the temperature. Therefore, the workpiece end close to the wall and the end away from the wall are heated unevenly. Therefore, after sintering, some workpieces are prone to different densities between the crystals at both ends, thereby reducing the quality of the NdFeB workpiece. Therefore, it is necessary to design a production and processing device and method for sintering NdFeB workpieces. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of uneven heating at both ends of a workpiece in the prior art, and to propose a production and processing device and method for sintering NdFeB workpieces.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A production and processing device for sintered NdFeB workpieces, comprising a first base, and also comprising: an installation box fixedly connected to the first base, wherein the installation box is provided with a first loading chamber, a sintering chamber, and a second loading chamber that are interconnected from left to right; a useful heating coil is fixedly connected to the inner wall of the sintering chamber, and the outer wall of the heating coil is covered with a heat insulation layer; a first mounting plate, a third mounting plate, and a second mounting plate that are slidably connected to the installation box from the left in sequence, the first mounting plate is rotatably connected with a first connecting plate, the second mounting plate is rotatably connected with a second connecting plate, and the third connecting plate and the fourth connecting plate are rotatably connected on both sides of the third mounting plate; the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are all provided with a first slide groove, and the first slide A connecting rod is slidably connected in the groove, and a locking plug is rotatably connected to the connecting rod. A spring is provided in the first slide groove, and the two ends of the spring are respectively against the inner wall of the first slide groove and the connecting rod; a mounting shaft is fixedly connected to the third mounting plate, and the two ends of the mounting shaft respectively pass through the third connecting plate and the fourth connecting plate and are respectively fixedly connected to the first gear and the second gear, and two groups of third gears that are respectively meshed with the first gear and the second gear are fixedly connected to the two groups of locking plugs; the first connecting plate is rotatably connected to the first push-pull rod, and the first push-pull rod is rotatably connected to the first gear, and the second gear is rotatably connected to the second push-pull rod, and the second push-pull rod is rotatably connected to the second connecting plate; a fixing part detachably connected to the two groups of symmetrical locking plugs.

[0007] In order to facilitate the fixation of the workpiece, preferably, the fixing part includes two groups of symmetrical mounting blocks, both groups of mounting blocks are provided with slots corresponding to the snap-on plugs, the mounting blocks are provided with a second slide groove, the second slide groove is rotatably connected to a bidirectional screw rod, the bidirectional screw rod is threadedly connected to two groups of symmetrical clamping plates, and the clamping grooves are provided on the clamping plates.

[0008] In order to facilitate the rapid installation of the workpiece, preferably, it further includes a second base, the second base is provided with a placement groove, the second base is fixedly connected with an alignment block, and the installation block is provided with an alignment groove corresponding to the alignment block.

[0009] In order to make the workpiece heated more evenly, preferably, the thickness of the clamping plate does not exceed two millimeters.

[0010] In order to facilitate the replacement of the workpiece in the sintering chamber, preferably, a third slide groove is opened in the first loading chamber, a connecting frame is slidably connected in the third slide groove, the connecting frame is fixedly connected to the first mounting plate, a threaded rod is rotatably connected to the third slide groove, the threaded rod is threadedly connected to the connecting frame, a fifth motor is fixedly connected to the outer wall of the mounting box, and the output end of the fifth motor is fixedly connected to the threaded rod.

[0011] In order to facilitate the rotation of the connecting plate, preferably, a third motor is fixedly connected to one end of the first mounting plate away from the first connecting plate, and the output shaft of the third motor passes through the first mounting plate and is fixedly connected to the first connecting plate; a fourth motor is fixedly connected to the side of the second mounting plate away from the second connecting plate, and the output shaft of the fourth motor passes through the second mounting plate and is fixedly connected to the second connecting plate.

[0012] To facilitate loading, preferably, a first box cover is rotatably connected to the first loading chamber, a first motor is fixedly connected to the side wall of the installation box, an output end of the first motor is fixedly connected to a first connecting shaft, the first box cover is fixedly connected to the first connecting shaft, and a second box cover is rotatably connected to the second loading chamber, a second motor is fixedly connected to the side wall of the installation box, an output end of the second motor is fixedly connected to a second connecting shaft, and the second connecting shaft is fixedly connected to the second box cover.

[0013] In order to facilitate the utilization of hot air, preferably, an air box is fixedly connected to the top of the installation box, a vacuum pump is fixedly connected to the top of the installation box, the input end of the vacuum pump is fixedly connected to a first air pipe extending into the sintering chamber, the exhaust end of the vacuum pump is fixedly connected to a second air pipe connected to the air box, the exhaust end of the air box is fixedly connected to a third air pipe connected to the first loading chamber and a fourth air pipe connected to the second loading chamber.

[0014] In order to facilitate the use of hot air, further, a first valve is provided on the third air pipe, and a second valve is provided on the fourth air pipe.

[0015] A sintering method comprises the following steps:

[0016] Step 1: Install the workpiece on the fixing part;

[0017] Step 2: Install the fixing piece on the snap-fit ​​plug outside the sintering chamber;

[0018] Step 4: Place the connecting plate with the fixing part into the sintering chamber;

[0019] Step 5: Vacuuming and then sintering, and installing a fixing part with the workpiece on another set of snap-fit ​​plugs overflowing the sintering chamber;

[0020] Step 6: After sintering is completed, discharge the external room temperature air into the sintering chamber;

[0021] Step 7: Send high-temperature air into the air box, then send the cooled workpiece into the loading chamber, and send the workpiece to be sintered into the sintering chamber for sintering;

[0022] Step 8: Replace the fixing part with the workpiece during sintering;

[0023] Step nine: Send the high-temperature gas in the gas box into the corresponding loading chamber to preheat the workpiece;

[0024] Step 10: Send the cooled workpiece into the loading chamber, and send the preheated workpiece into the sintering chamber;

[0025] Step 11: Repeat steps 6 to 10.

[0026] Compared with the prior art, the present invention provides a production and processing device for sintered NdFeB workpieces, which has the following beneficial effects:

[0027] 1. The production and processing device for sintering NdFeB workpieces drives the workpiece to flip over by making the fixing part of the workpiece fixed in the sintering chamber, so that the upper and lower ends of the workpiece can absorb heat evenly, so that the workpiece is heated more evenly, thereby improving the quality of the sintered workpiece.

[0028] 2. The production and processing device for sintering NdFeB workpieces exchanges loading and unloading through two loading chambers, thereby completing the replacement of workpieces and preheating during the sintering process, thereby improving the overall sintering efficiency.

[0029] 3. The production and processing device of the sintered NdFeB workpiece preheats the workpiece before sintering by utilizing the heat emitted by the workpiece after sintering, thereby saving waste of heat energy and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The main cross-sectional view of a production and processing device for sintered NdFeB workpieces proposed by the present invention Figure 1 ;

[0031] Figure 2 The main cross-sectional view of a production and processing device for sintered NdFeB workpieces proposed by the present invention Figure 2 ;

[0032] Figure 3 A rear view of a production and processing device for sintered NdFeB workpieces proposed by the present invention;

[0033] Figure 4 A schematic diagram of the structure of the fixing part of a production and processing device for sintering NdFeB workpieces proposed by the present invention Figure 1 ;

[0034] Figure 5 A schematic diagram of the structure of the fixing part of a production and processing device for sintering NdFeB workpieces proposed by the present invention Figure 2 ;

[0035] Figure 6 A production and processing device for sintered NdFeB workpieces proposed by the present invention Figure 2 The structural diagram of part A in the figure;

[0036] Figure 7 A production and processing device for sintered NdFeB workpieces proposed by the present invention Figure 2 The structural diagram of part B;

[0037] Figure 8 The present invention is a right sectional view of a production and processing device for sintered NdFeB workpieces.

[0038] In the figure: 100, first base; 200, mounting box; 201, first loading chamber; 2011, first box cover; 2012, first motor; 2013, first connecting shaft; 202, sintering chamber; 2021, heat insulation layer; 2022, heating coil; 203, second loading chamber; 2031, second box cover; 2032, second motor; 2033, second connecting shaft; 301, first mounting plate; 302, first connecting plate; 303, second mounting plate; 304, second connecting plate; 305, third motor; 306, fourth motor; 400, third mounting plate; 401, third connecting plate; 402, fourth connecting plate; 403, mounting shaft; 404, first gear; 405, second Gear; 500, first slide; 501, connecting rod; 502, spring; 503, snap-fit ​​plug; 504, third gear; 600, second base; 601, placement slot; 602, alignment block; 603, mounting block; 604, slot; 605, second slide; 606, two-way screw; 607, clamp; 608, clamping slot; 700, third slide; 701, connecting frame; 702, threaded rod; 703, fifth motor; 801, first push-pull rod; 802, second push-pull rod; 900, air box; 901, vacuum pump; 902, first air pipe; 903, second air pipe; 904, third air pipe; 905, first valve; 906, fourth air pipe; 907, second valve. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Example: Refer to Figure 1-Figure 8, a production and processing device for sintered NdFeB workpieces, including a first base 100, and also including: an installation box 200 fixedly connected to the first base 100, wherein the installation box 200 is provided with a first loading chamber 201, a sintering chamber 202, and a second loading chamber 203 which are interconnected from left to right; a useful heating coil 2022 is fixedly connected to the inner wall of the sintering chamber 202, and an outer wall of the heating coil 2022 is covered with a heat insulation layer 2021; a first mounting plate 301, a third mounting plate 400, and a second mounting plate 303 which are slidably connected to the installation box 200 from left to right, the first mounting plate 301 is rotatably connected to the first connecting plate 302, the second mounting plate 303 is rotatably connected to the second connecting plate 304, and the third connecting plate 401 and the fourth connecting plate 402 are rotatably connected on both sides of the third mounting plate 400; the first connecting plate 302, the second connecting plate 304, the third connecting plate 401, and the fourth connecting plate 402 are all provided with a first slide groove 500, the first connecting plate 302, the second connecting plate 304, the third connecting plate 401, and the fourth connecting plate 402 are all provided with a first slide groove 500, and the first connecting plate 302, the second connecting plate 304, the third connecting plate 401, and the fourth connecting plate 402 are all provided with a first slide groove 500, and the first connecting plate 302, the second connecting plate 304, the third connecting plate 401, and the fourth connecting plate 402 are provided with a first slide groove 500. A connecting rod 501 is slidably connected in a slide groove 500, and a plug 503 is rotatably connected to the connecting rod 501. A spring 502 is provided in the first slide groove 500, and the two ends of the spring 502 are respectively against the inner wall of the first slide groove 500 and the connecting rod 501; a mounting shaft 403 is fixedly connected to the third mounting plate 400, and the two ends of the mounting shaft 403 respectively penetrate the third connecting plate 401 and the fourth connecting plate 402 and are respectively fixedly connected to the first gear 404 and the second gear 404. 5. Two sets of third gears 504 respectively meshing with the first gear 404 and the second gear 405 are fixedly connected to the two sets of engaging plugs 503; the first connecting plate 302 is rotatably connected to the first push-pull rod 801, the first push-pull rod 801 is rotatably connected to the first gear 404, the second gear 405 is rotatably connected to the second push-pull rod 802, the second push-pull rod 802 is rotatably connected to the second connecting plate 304; the fixing parts detachably connected to the two sets of symmetrical engaging plugs 503.

[0042] The workpiece is fixed on the fixing part, and the fixing part is fixed on two sets of symmetrical snap-in plugs 503. Specifically, one end of the fixing part is first inserted into the snap-in plug 503 on one side, and then the snap-in plug 503 on the other side is pressed. When the snap-in plug 503 is compressed, the connecting rod 501 slides into the first slide groove 500, and the spring 502 contracts. When the pressure is lost, the spring 502 rebounds to reset the snap-in plug 503, so that it is inserted into the fixing part to fix the fixing part. The installed fixing part is then sent from the corresponding feeding cavity into the sintering cavity 202 for sintering. Even if the heating coil 2022 is energized to generate high temperature to sinter the workpiece, it should be noted that when installing the fixing part, the end corresponding to the first mounting plate 301 and the second mounting plate 303 is installed first to prevent the third gear 504 from being unable to mate with the first The second gear 405 or the first gear 404 re-engages after disengagement. Furthermore, the connecting rod 501 on the third connecting plate 401 and the fourth connecting plate 402 can be fixedly connected to the third connecting plate 401 and the fourth connecting plate 402, and then the fixing part can be connected to the third connecting plate 401 and the fourth connecting plate 402 first, so as to avoid the gears from being disengaged and unable to re-engage. When the third connecting plate 401 or the fourth connecting plate 402 rotates, the third gear 504 rotates around the axis of the mounting shaft 403 as the axis center, and at the same time, the corresponding engaging plug 503 is rotated through the reaction force generated between the first gear 404 or the second gear 405, so that the fixing part fixed on the engaging plug 503 is rotated, so that the upper and lower ends of the workpiece are evenly heated, so that the workpiece is heated more evenly, thereby improving the sintering effect.

[0043] Reference Figure 5 and Figure 6 The fixing part includes two groups of symmetrical mounting blocks 603, both groups of mounting blocks 603 are provided with slots 604 corresponding to the engaging plugs 503, the mounting blocks 603 are provided with a second slide groove 605, the second slide groove 605 is rotatably connected with a bidirectional screw rod 606, the bidirectional screw rod 606 is threadedly connected with two groups of symmetrical clamping plates 607, the clamping plates 607 are provided with clamping grooves 608, and also includes a second base 600, the second base 600 is provided with a placement groove 601, the second base 600 is fixedly connected with an alignment block 602, the mounting block 603 is provided with an alignment groove corresponding to the alignment block 602, and the thickness of the clamping plate 607 does not exceed two millimeters.

[0044] During the preheating process of the workpiece inside one of the loading chambers, the external workpiece can be placed on the placement groove 601, and then the mounting block 603 with two sets of clamps 607 opened can be placed on the second base 600, so that the alignment block 602 is inserted into the alignment groove, and then the bidirectional screw 606 is rotated, and the two sets of clamps 607 of the bidirectional screw 606 move toward the workpiece at the same time, so as to fix the workpiece, thereby saving time in the sintering preparation process and improving the sintering efficiency. It should be noted that in order to prevent the workpiece from falling, the clamp 607 is provided with two layers, and the thickness of each layer does not exceed two millimeters. By setting the thickness of the clamp 607 to within two millimeters, the area of ​​the workpiece blocked can be reduced, so that the workpiece is heated more evenly and the sintering effect is improved.

[0045] Reference Figure 1 and Figure 6 A third slide groove 700 is opened in the first feeding chamber 201, and a connecting frame 701 is slidably connected in the third slide groove 700. The connecting frame 701 is fixedly connected to the first mounting plate 301. A threaded rod 702 is rotatably connected to the third slide groove 700, and the threaded rod 702 is threadedly connected to the connecting frame 701. A fifth motor 703 is fixedly connected to the outer wall of the mounting box 200, and the output end of the fifth motor 703 is fixedly connected to the threaded rod 702.

[0046] Start the fifth motor 703, and the fifth motor 703 makes the connecting frame 701 slide in the third slide groove 700 through the threaded rod 702, thereby dragging the first mounting plate 301 to move through the connecting frame 701, and the first mounting plate 301 drives the first connecting plate 302 to move, and the first connecting plate 302 drives the first gear 404 to move through the first push-pull rod 801, and the first gear 404 drives the second gear 405 to move, and the second gear 405 drives the second connecting plate 304 to move through the second push-pull rod 802, and the second connecting plate 304 drives the second mounting plate 303 to move, thereby controlling the position of the preheated workpiece and the sintered workpiece.

[0047] Reference Figure 1 and Figure 2 A third motor 305 is fixedly connected to one end of the first mounting plate 301 away from the first connecting plate 302, and an output shaft of the third motor 305 passes through the first mounting plate 301 and is fixedly connected to the first connecting plate 302. A fourth motor 306 is fixedly connected to one side of the second mounting plate 303 away from the second connecting plate 304, and an output shaft of the fourth motor 306 passes through the second mounting plate 303 and is fixedly connected to the second connecting plate 304.

[0048] After the fixing part is installed on the corresponding engaging plug 503, the third motor 305 is started, and the third motor 305 rotates the first connecting plate 302 on the first mounting plate 301, and the first connecting plate 302 rotates the third connecting plate 401 on the third mounting plate 400 through the fixing part, and the fourth motor 306 is started, and the fourth motor 306 rotates the second connecting plate 304 on the second mounting plate 303, and the second connecting plate 304 rotates the fourth connecting plate 402 on the third mounting plate 400 through the fixing part, so as to facilitate the replacement of the position of the engaging plug 503, thereby facilitating the loading of materials and facilitating the rotation of the fixing part around the axis of the connecting rod 501, so that the workpiece is heated more evenly, thereby improving the sintering effect.

[0049] Reference Figure 1 and Figure 2 The first loading chamber 201 is rotatably connected to the first box cover 2011, the side wall of the installation box 200 is fixedly connected to the first motor 2012, the output end of the first motor 2012 is fixedly connected to the first connecting shaft 2013, the first box cover 2011 is fixedly connected to the first connecting shaft 2013, the second loading chamber 203 is rotatably connected to the second box cover 2031, the side wall of the installation box 200 is fixedly connected to the second motor 2032, the output end of the second motor 2032 is fixedly connected to the second connecting shaft 2033, and the second connecting shaft 2033 is fixedly connected to the second box cover 2031.

[0050] The first motor 2012 is started, and the first box cover 2011 is rotated by the first connecting shaft 2013, thereby opening the first box cover 2011, which is convenient for the staff to take and load materials from the first loading chamber 201, and the second motor 2032 is started, and the second motor 2032 rotates the second box cover 2031 by the second connecting shaft 2033, thereby opening the second box cover 2031, and then facilitating the staff to load and unload materials at the second loading chamber 203, thereby facilitating the exchange of taking and loading materials, thereby improving the overall efficiency of sintering.

[0051] Reference Figure 1-Figure 3 The top of the installation box 200 is fixedly connected to an air box 900, the top of the installation box 200 is fixedly connected to a vacuum pump 901, the input end of the vacuum pump 901 is fixedly connected to a first air pipe 902 extending into the sintering chamber 202, the exhaust end of the vacuum pump 901 is fixedly connected to a second air pipe 903 connected to the air box 900, the exhaust end of the air box 900 is fixedly connected to a third air pipe 904 connected to the first loading chamber 201 and a fourth air pipe 906 connected to the second loading chamber 203, the third air pipe 904 is provided with a first valve 905, and the fourth air pipe 906 is provided with a second valve 907.

[0052] Start the vacuum pump 901, and use the vacuum pump 901 to evacuate the air inside the sintering chamber 202, so that the pressure inside the sintering chamber 202 reaches the value required for sintering, so that the sintering chamber 202 meets the regulation of sintering. When sintering is completed, open the control valve on the outer wall of the installation box 200 and the air supply pipe inside the sintering chamber 202 to allow external air to enter the sintering chamber 202. The external air enters the sintering chamber 202 to absorb the high temperature inside the sintering chamber 202 to form hot air, and then the hot air is sent to the air box 900 through the vacuum pump 901. Inside, it continuously absorbs the hot air inside the sintering chamber 202 and sends it into the air box 900 for storage. As the pressure of the gas inside the air box 900 increases, the temperature rises accordingly. It should be noted that the air box 900 is an insulation box with an insulation layer inside. When the workpiece inside a certain loading chamber is replaced, the corresponding box cover liquid is closed, and the corresponding valve is opened to allow the high-temperature and high-pressure gas inside the air box 900 to enter the corresponding loading chamber to preheat the workpiece inside, thereby improving the utilization of thermal energy and saving energy loss.

[0053] A sintering method comprises the following steps:

[0054] Step 1: Install the workpiece on the fixing part;

[0055] Step 2: Install the fixing member on the snap-fit ​​plug 503 outside the sintering chamber 202;

[0056] Step 4: Place the connecting plate with the fixing part into the sintering chamber 202;

[0057] Step 5: Vacuuming and then sintering, and installing a fixing part with a workpiece on another set of engaging plugs 503 overflowing the sintering chamber 202;

[0058] Step 6: After sintering is completed, discharge the external room temperature air into the sintering chamber 202;

[0059] Step 7: Send high-temperature air into the air box 900, then send the cooled workpiece into the loading chamber, and send the workpiece to be sintered into the sintering chamber 202 for sintering;

[0060] Step 8: Replace the fixing part with the workpiece during sintering;

[0061] Step nine: Send the high-temperature gas in the gas box 900 into the corresponding loading chamber to preheat the workpiece;

[0062] Step 10: Send the cooled workpiece into the loading chamber, and send the preheated workpiece into the sintering chamber 202;

[0063] Step 11: Repeat steps 6 to 10.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A production and processing device for sintered NdFeB workpieces, comprising a first base (100), characterized in that: Also includes: An installation box (200) fixedly connected to the first base (100), wherein the installation box (200) is provided with a first loading chamber (201), a sintering chamber (202) and a second loading chamber (203) which are interconnected from left to right; A useful heating coil (2022) is fixedly connected to the inner wall of the sintering chamber (202), and the outer wall of the heating coil (2022) is covered with a heat insulation layer (2021); A first mounting plate (301), a third mounting plate (400) and a second mounting plate (303) are slidably connected in sequence from the left to the inside of the mounting box (200); a first connecting plate (302) is rotatably connected to the first mounting plate (301); a second connecting plate (304) is rotatably connected to the second mounting plate (303); and a third connecting plate (401) and a fourth connecting plate (402) are rotatably connected to the two sides of the third mounting plate (400); The first connecting plate (302), the second connecting plate (304), the third connecting plate (401) and the fourth connecting plate (402) are all provided with a first sliding groove (500), a connecting rod (501) is slidably connected in the first sliding groove (500), a locking plug (503) is rotatably connected to the connecting rod (501), a spring (502) is provided in the first sliding groove (500), and two ends of the spring (502) are respectively against the inner wall of the first sliding groove (500) and the connecting rod (501); a mounting shaft (403) fixedly connected to the third mounting plate (400), wherein two ends of the mounting shaft (403) respectively penetrate the third connecting plate (401) and the fourth connecting plate (402) and are respectively fixedly connected to a first gear (404) and a second gear (405), and two sets of the engaging plugs (503) are fixedly connected to two sets of third gears (504) respectively meshing with the first gear (404) and the second gear (405); The first connecting plate (302) is rotatably connected to a first push-pull rod (801), the first push-pull rod (801) is rotatably connected to the first gear (404), the second gear (405) is rotatably connected to a second push-pull rod (802), the second push-pull rod (802) is rotatably connected to the second connecting plate (304); A fixing portion detachably connected to the two groups of symmetrical snap-fit ​​plugs (503); The top of the installation box (200) is fixedly connected to an air box (900), the top of the installation box (200) is fixedly connected to a vacuum pump (901), the input end of the vacuum pump (901) is fixedly connected to a first air pipe (902) extending into the sintering chamber (202), the exhaust end of the vacuum pump (901) is fixedly connected to a second air pipe (903) connected to the air box (900), and the exhaust end of the air box (900) is fixedly connected to a third air pipe (904) connected to the first loading chamber (201) and a fourth air pipe (906) connected to the second loading chamber (203).

2. The production and processing device for sintered NdFeB workpiece according to claim 1, characterized in that: The fixing part comprises two groups of symmetrical mounting blocks (603), both groups of mounting blocks (603) are provided with slots (604) corresponding to the engaging plugs (503), the mounting blocks (603) are provided with second slide grooves (605), the second slide grooves (605) are rotatably connected with a bidirectional screw rod (606), the bidirectional screw rod (606) is threadedly connected with two groups of symmetrical clamping plates (607), and the clamping plates (607) are provided with clamping grooves (608).

3. The production and processing device for sintered NdFeB workpiece according to claim 2, characterized in that: The device further comprises a second base (600), wherein a placement groove (601) is provided on the second base (600), an alignment block (602) is fixedly connected to the second base (600), and an alignment groove corresponding to the alignment block (602) is provided on the mounting block (603).

4. The production and processing device for sintered NdFeB workpiece according to claim 3, characterized in that: The thickness of the clamping plate (607) does not exceed two millimeters.

5. The production and processing device for sintered NdFeB workpiece according to claim 1, characterized in that: A third slide groove (700) is provided in the first loading chamber (201), a connecting frame (701) is slidably connected in the third slide groove (700), the connecting frame (701) is fixedly connected to the first mounting plate (301), a threaded rod (702) is rotatably connected to the third slide groove (700), the threaded rod (702) is threadedly connected to the connecting frame (701), a fifth motor (703) is fixedly connected to the outer wall of the mounting box (200), and the output end of the fifth motor (703) is fixedly connected to the threaded rod (702).

6. The production and processing device for sintered NdFeB workpiece according to claim 1, characterized in that: A third motor (305) is fixedly connected to one end of the first mounting plate (301) away from the first connecting plate (302), and an output shaft of the third motor (305) passes through the first mounting plate (301) and is fixedly connected to the first connecting plate (302); a fourth motor (306) is fixedly connected to one side of the second mounting plate (303) away from the second connecting plate (304), and an output shaft of the fourth motor (306) passes through the second mounting plate (303) and is fixedly connected to the second connecting plate (304).

7. The production and processing device for sintered NdFeB workpiece according to claim 1, characterized in that: The first loading chamber (201) is rotatably connected to a first box cover (2011); a first motor (2012) is fixedly connected to a side wall of the installation box (200); an output end of the first motor (2012) is fixedly connected to a first connecting shaft (2013); the first box cover (2011) is fixedly connected to the first connecting shaft (2013); the second loading chamber (203) is rotatably connected to a second box cover (2031); a second motor (2032) is fixedly connected to a side wall of the installation box (200); an output end of the second motor (2032) is fixedly connected to a second connecting shaft (2033); and the second connecting shaft (2033) is fixedly connected to the second box cover (2031).

8. The production and processing device for sintered NdFeB workpiece according to claim 1, characterized in that: The third air pipe (904) is provided with a first valve (905), and the fourth air pipe (906) is provided with a second valve (907).

9. A sintering method, comprising the production and processing device for sintering NdFeB workpieces according to claim 1, characterized in that: The following steps are involved: Step 1: Install the workpiece on the fixing part; Step 2: Install the fixing member on the snap-fit ​​plug (503) outside the sintering chamber (202); Step 4: Place the connecting plate with the fixing part into the sintering chamber (202); Step 5: Vacuuming and then sintering, and installing a fixing part with a workpiece on another set of engaging plugs (503) overflowing the sintering chamber (202); Step 6: After sintering is completed, discharge the external room temperature air into the sintering chamber (202); Step 7: Send high-temperature air into the air box (900), then send the workpiece after cooling into the loading chamber, and send the workpiece to be sintered into the sintering chamber (202) for sintering; Step 8: Replace the fixing part with the workpiece during sintering; Step nine: sending the high-temperature gas in the gas box (900) into the corresponding loading chamber to preheat the workpiece; Step 10: sending the cooled workpiece into the loading chamber, and sending the preheated workpiece into the sintering chamber (202); Step 11: Repeat steps 6 to 10.

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