WO2014071708A1

WO2014071708A1 - Technological process for continuously sintering rare earth permanently magnetic alloy and sintering equipment therefor

Info

Publication number: WO2014071708A1
Application number: PCT/CN2013/071355
Authority: WO
Inventors: 孙宝玉; 陈晓东
Original assignee: 沈阳中北通磁科技股份有限公司
Priority date: 2012-11-08
Filing date: 2013-02-05
Publication date: 2014-05-15
Also published as: CN103805835A; CN103805835B

Abstract

Provided in this invention is a technological process for continuously sintering a rare earth permanently magnetic alloy, comprising: connecting a preparation box, a glove box, a tunnel-type sealed conveying box, a lock chamber, a charging chamber, a pre-heating chamber, a heated degassing chamber, a sintering chamber, and a cooling chamber in series, by means of isolation valves between the boxes and chambers; conveying the rare earth permanently magnetic powder alloy formed by compacting through an oxygen-free atmosphere; and subjecting the same to treatment, such as heating, degassing, sintering, and cooling in different chambers. The preparation box, glove box, and tunnel-type sealed conveying box are driven by bottom rollers, while the driving devices in other chambers are arranged in the upper part of the respective chambers with conveying roller tracks, a roller of a material rack is suspended on a track of the conveying device, and a drawer-type material rack can contain a plurality of material boxes. A vertical rectangular furnace is also provided, having a narrow heating zone width, even heating, and fast cooling with high efficiency. Under the premise of a substantial energy saving, oxygen-free conveying and continuous sintering improve the performance of products and ensure that the sintered rare-earth permanently magnetic alloy has a consistent magnetic performance.

Description

Rare earth permanent magnet alloy continuous sintering process method and sintering device thereof

Technical field

The invention relates to a continuous sintering process method for a NdFeB rare earth permanent magnet alloy and a sintering device thereof, and belongs to the technical field of a permanent magnet alloy processing device and a process.

Background technique

R-Fe-B NdFeB rare earth permanent magnets with R ₂ Fe ₁₄ B type compound as the main phase have been used more and more for their excellent magnetic properties, and are widely used in medical magnetic resonance imaging, computers. Hard disk drives, mobile phone vibration motors, hybrid car motors, wind turbines, etc.

The existing NdFeB rare earth permanent magnet alloy vacuum sintering furnace is a single-chamber furnace with heating and rapid cooling functions, and some sintering furnaces are also provided with a protective atmosphere glove box. Because the inner heating furnace can only be heated under vacuum, the heating speed is slow, and the long-term use temperature uniformity is deteriorated; because the heating and cooling processes are repeated every time, the inert gas is consumed more, the energy consumption is large, and the heater and The insulation layer causes pollution and the service life of the sintering furnace is greatly shortened.

Summary of the invention

In view of the above technical problems, the present invention provides a continuous sintering process of a rare earth permanent magnet alloy and a sintering apparatus therefor.

The sintering process method of the present invention has the following process:

(1) The press-formed rare earth permanent magnet powder alloy blank is subjected to air-packaging treatment, transferred to a preparation box, closed the door, vacuumed or filled with inert gas to replace the air in the tank; when the pressure of the preparation box and the glove box is balanced, Open the 6ft isolation valve between the boxes, transfer the packaged blanks to the glove box, and close the 6ft isolation valve between the boxes; unpack the blanks into the magazine in the glove box, the boxes are arranged in a row; when the glove box and the transfer box Pressure balance, open the 7ft isolation valve between the boxes, transfer the smashed box to the transfer sealing box, and close the 7ft isolation valve between the boxes; the smashed box is transferred to the robot at the interface with the loading chamber, and the material is fed by the robot The box is loaded into the rack of the loading chamber; in the above process, the oxygen content of each box and the charging chamber is < 50 (^ ?111 _;

(2) When the pressure between the charging chamber and the preheating chamber is balanced, open the 1 ft isolation valve between the chambers, transfer the rack to the preheating chamber, close the l ft isolation valve; start vacuuming, when the vacuum is higher than l Pa, start Heat to 400-500 °C, keep warm for 1-3 hours;

(3) The heating degassing chamber is in a vacuum state, the heating temperature is 400-500 °C, the 2ft isolation valve is opened, the material rack is transferred to the heating degassing chamber, and the 2ft isolation valve is closed; Degree from 400 ° C ~ 900 ° C take a number of heating and holding 2-4 hours, the vacuum reached 3E_2Pa;

(4) The sintering chamber is in a vacuum state, the heating temperature is up to 850 ° C, the 3 ft isolation valve between the chambers is opened, the material rack is transferred to the heating degassing chamber, and the 3 ft isolation valve is closed; when the vacuum degree is higher than 3E-2 Pa, the temperature is further increased. Heating temperature to 1040 ° C ~ 1080 ° C sintering, the degree of vacuum reaches lE-2Pa;

(5) The cooling chamber is in a vacuum state, open the 4ft isolation valve between the chambers, the rack is transferred to the cooling chamber, and the 4ft isolation valve is closed; the nitrogen or argon gas is filled to 0. OlMPa, and the rare earth in the box and the box is activated. The magnetic alloy is cooled and cooled to below 80 ° C; when the chamber pressure is balanced to atmospheric pressure, the outlet chamber door is opened, the rack is transferred to the outlet transition frame, and the outlet chamber door is closed; the cartridge in the rack is taken from the material Take out

(6) The material rack enters the inlet transition frame through the return line, the lock chamber is inflated to atmospheric pressure, the chamber door is opened, the rack is transferred to the lock chamber, and the inlet chamber door is vacuumed to lPa, and the inert gas is filled. The pressure between the lock chamber and the loading chamber is balanced. The 5ft isolation valve is opened between the chambers. The rack is transported to the loading chamber for loading the cartridge, and the 5ft isolation valve is closed.

Further, the present invention can also add step (7). After the cooling chamber, an aging chamber can be connected in series through the isolation valve, and the rack is transported to the aging chamber at a heating temperature of 800 ° C to 900 ° C for 2 to 4 hours. Hour; heating temperature 450 ° C ~ 550 ° C, time 2 ~ 4 hours.

Further, the present invention may further increase the step (8). After the aging chamber, a cooling chamber 2 may be connected in series through the isolation valve, and the rack is transported to the cooling chamber 2; nitrogen or argon gas is supplied to 0.01 MPa to 0.19 MPa, Start the fan to cool the rare earth permanent magnet alloy in the material box and the material box, and cool it to below 80 °C; when the chamber pressure is balanced to atmospheric pressure, open the end chamber door, the material rack is transferred to the end transition frame, and the outlet end is closed. Door; remove the magazine from the rack from the rack.

The invention adopts a sintering device for a continuous sintering process of a rare earth permanent magnet alloy, which comprises a preparation box, a glove box, a sealed transfer box, and a lock chamber, a charging chamber, a preheating chamber, a heating degassing chamber, and a sintering. a chamber, a cooling chamber, a transmission of each chamber, a return frame and a vacuuming device, each chamber being connected by an inter-chamber isolation valve, the sealed transfer box being connected to the charging chamber; each chamber transmission being disposed at an upper portion of each chamber Each outdoor is provided with a return frame with a transmission device, the return frame is connected with the transition frame of the inlet and the exit, the frame is suspended and reciprocated on the transmission device, and the material box is conveyed to the rack through the sealed transfer box, and is preheated. The chamber, the heating degassing chamber and the sintering outdoor wall are respectively provided with a water-cooled tube or a water-cooled jacket, an evacuation line, an inert gas introduction line, a safety valve and a pressure gauge.

Further, the preheating chamber, the heating degassing chamber and the sintering chamber are respectively provided with vertical rectangular heating Furnace, the inner wall of the heating furnace is provided with a heat insulation layer, and a plurality of heaters are arranged inside the heat insulation layer, each set of heaters is provided with a thermocouple, and the temperature is grouped and controlled; the transmission device is disposed outside the heating furnace, and the upper part of the heating furnace There is a heat insulation board that can be opened and closed.

Further, the isolation valve between the chambers is a one-way sealing flapper valve, comprising a valve body, a second cylinder, a plurality of cylinders or cylinders, a first valve plate and front and rear blind flanges, wherein the valve body corresponds to two The front side is provided with front and rear blind flanges respectively, and the outer part of the front blind flange is provided with a second cylinder and a cooling water pipe assembly; the valve body is provided with a first valve plate parallel to the other two sides, and the first valve plate is passed through the valve plate The device is suspended in the upper part of the valve body, and the valve plate traveling device is rigidly connected with the cylinder rod head portion of the external second cylinder. The bottom of the first valve plate is provided with a second roller and a bottom rail thereof, and the first valve plate is welded with a water-cooled tube or The jacket, the water-cooled pipe or the jacket is connected to the two sealed rigid cooling water pipe shafts through the hose of the cooling water pipe assembly, and the cooling water pipe shaft is connected with the cylinder rod of the second cylinder to realize linkage, and the first valve plate is displaced and cooled. The water pipe shaft is relatively stationary, and a plurality of cylinders or cylinders are respectively connected with the two ends of the first valve plate to lock the first valve plate to achieve sealing.

Further, a side wall of the cooling chamber is provided with a second motor, and a bellows is arranged inside, a side plate of the wind box has a plurality of guiding tubes, and a corresponding side has a heat exchanger, and an air outlet of the heat exchanger faces the air inlet of the fan. The fan is connected to the second motor shaft, and a curved baffle is arranged around the cooling chamber wall; the external connection is connected with an evacuation line, an inert gas introduction line and a safety valve line; and the vacuum line is connected with the vacuuming device.

Further, the preheating chamber is equipped with a wax collection tank as a dewaxing chamber.

Further, the transmission device includes a first motor, a chain, a gear pair, two bearing seats, two parallel rails, two sets of first rollers, two first sprocket wheels, a second sprocket and a chain plate, and the two first The sprocket is mounted on a hinge shaft extending out of the housing through each of the chamber housings, and the first motor output shaft is connected to the first sprocket by a chain, and one end of the two bearing housings is respectively mounted on the sprocket shaft in the housing, and the other end A shaft parallel to the hinge shaft is connected between the shaft and the hinge shaft, and the second sprocket is mounted on the sprocket shaft in the housing, and the two sets of first rollers are placed in the two parallel guide rails. A chain plate that cooperates with the second sprocket is mounted on the roller shaft by its roller shaft connection, and the other end of the chain plate is connected to the rack link.

Further, the spring seat is connected to the bearing housing, and the other end of the spring plate is connected to the housing of each chamber. When working, the spring plate is forced to tightly connect the second sprocket and the chain plate.

Further, the preparation box, the glove box and the tunnel transmission sealing box are vacuum or protective atmosphere sealed boxes, respectively provided with an evacuation pipeline connection vacuum device, and an inert gas inflation pipeline is connected to the inert gas system; There is a compartment isolation valve between the boxes, a box door at the other end of the preparation box, and a magazine for loading the cartridge into the loading chamber by the robot in the transmission sealing box; each box is provided with a pressure gauge and a vacuum gauge, A balance valve line is connected between the adjacent two tanks, and the pressure of the two tanks is balanced by the balance valve line.

Further, the inter-chamber isolation valve includes a valve box body, a third cylinder and a second valve plate disposed therein, a hinge plate, a connecting rod, a third roller, a guiding track and a collision block, and the second valve plate passes A plurality of connecting rods are connected to the hinge plate, a guiding rail is arranged in the valve box body, and a third roller sliding along the guiding rail is arranged on the hinge plate, the third cylinder is placed outside the valve box, and the cylinder rod extends into the valve body Connected to the hinge plate, the collision block is placed on the valve end cover of the valve box body, the second valve plate is provided with a rubber ring near the flange end of the valve port side, and the third cylinder drives the hinge plate to move on the guide roller track, the second valve plate When the impact block is hit, the connecting rod pushes the second valve plate toward the valve port side flange, and the compression apron completes the isolation and sealing function.

The beneficial effects of the invention:

1. Compared with the existing vacuum sintering furnace, the invention decomposes the heating, sintering and cooling processes into different vacuum chambers, avoids repeated heating and cooling of the existing single-chamber sintering furnace, and has low energy consumption and low efficiency. As well as the problem that the heater and the heat insulation layer are polluted, the problem of dewaxing of the blank can be effectively solved, and the production capacity and product consistency are greatly improved under the premise of energy saving, and the service life of the equipment is improved, and the maintenance time of the equipment is shortened.

2. The vertical rectangular heating furnace is arranged in the preheating chamber, the heating degassing chamber and the sintering chamber of the invention, and the heating temperature is grouped and controlled, the heating zone has a narrow width, uniform heating, fast cooling and high efficiency. Under the premise of large energy saving, anaerobic conveying and continuous sintering improve the performance of the product and ensure the consistency of the magnetic properties of the sintered rare earth permanent magnet alloy.

3. The transmission device of the present invention is provided with the same transmission structure as that of each chamber to realize reciprocating transmission.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention. 2 is a cross-sectional structural view of the heating degassing chamber of FIG. 1. Figure 3 is a left side view of Figure 2.

Figure 4 is a schematic view showing the structure of the cooling chamber of Figure 1.

Figure 5 is a schematic view showing the structure of the inter-chamber isolation valve of Figure 1.

Figure 6 is a left side view of Figure 5.

Figure 7 is a top plan view of Figure 5.

Figure 8 is a schematic view showing the structure of the preparation box of Figure 1.

Figure 9 is a schematic view showing the structure of the glove box of Figure 1.

Figure 10 is a schematic view showing the structure of the isolation valve between the boxes in Figure 1. In the figure: 1, hanging conveyor system; 2, material rack; 3, the end transition frame; 4, the entrance door; 5, 1 ft vacuum device; 6, rough pump valve; 7, 1 ft spool valve; 8, 1 ft Roots pump; 9, l ft bypass valve; 10, lock chamber; 1 1, pneumatic pipeline; 12, 1 ft pressure gauge; 13, vacuum gauge; 14, l ft isolation valve; Gas introduction pipeline; 16, preheating chamber; 17, safety valve; 18, flange; 19, main valve; 20, diffusion pump; 21, 2ft Roots pump; 22, 2ft spool valve; 23, 2ft bypass Valve; 24, 2ft vacuum device; 25, 2ft isolation valve; 26, heating degassing chamber; 27, 3ft vacuum device; 28, 3ft isolation valve; 29, sintering chamber; 30, 4ft vacuum device; 31, 4ft isolation valve; 32, 5ft vacuum device; 33, fan; 34, cooling room; 35, outlet door; 36, outlet transition frame; 37, preparation box; 38, 6ft isolation valve; 39, glove box; 40, 7ft isolation valve 41, sealed transfer box; 42, cartridge; 43, robot; 44, loading chamber; 45, 5ft isolation valve; 4 6, safety valve take-over flange; 47, inflatable flange; 48, bearing seat; 49, the first sprocket; 50, gear pair; 51, heat insulation board; 52, water-cooled tube; 53, the first roller, 54, 55; suction pipe flange; 56, upper insulation layer; 57, thermocouple; 58, water-cooled electrode; 59, side insulation; 60, heater; 61, lower insulation; 62, spring plate 63, the chain; 64, the first motor; 65, the second sprocket; 66, the first cylinder; 67, the photoelectric switch; 68, the second motor; 70, the heat exchanger; 71, the draft tube; Flow plate; 73, second cylinder; 74, first magnetic switch; 75, front blind flange; 76, valve body; 77, second magnetic switch; 78, cylinder or cylinder; 79, first apron; 81, heat shield; 82, rear blind flange; 83, second roller; 84, bottom rail; 85, connecting plate; 86, cooling water pipe shaft; 87, hose; 88, upper track; , hinge plate; 90, box door; 91, l ft bleed valve line; 92, 1 ft electric control cabinet; 93, 1 # observation window; 1 ft inflatable valve line; 95, 2ft pressure gauge; 96, chain plate; 97, 1 ft bottom roller drive; 98, glove flange assembly; 99, 2ft observation window; 100, 2ft electric control cabinet; 2ft bleed valve line; 102, 2ft inflatable valve line; 103, 3ft pressure gauge; 104, 2ft bottom roller drive; 105, third cylinder; 106, third magnetic switch; 107, third roller; , track; 109, second apron; 1 10, second valve plate; 1 1 1, hinge plate; 1 12, connecting rod; 1 13, bumper, 1 14, valve end cap

detailed description

The invention will be further described below in conjunction with the drawings and embodiments.

Embodiments: As shown in FIG. 1, the rare earth permanent magnet alloy continuous sintering furnace of the present invention is arranged in order a preparation box 37, a glove box 39, a sealed transfer box 41, and a lock chamber 10, a charging chamber 44, a preheating chamber 16, a heating degassing chamber 26, a sintering chamber 29, a cooling chamber 34, and a transmission of each chamber The return line frame and each chamber vacuuming device are arranged, and each chamber is connected by an inter-chamber isolation valve, and the sealed transmission box 41 is connected with the charging chamber 44; each chamber transmission device is arranged at an upper part of each chamber, and each outdoor is provided with a belt A return frame with a transmission, each of the transmissions together with the return frame and the transmission thereon constitutes a suspended conveyor system

1; the return frame is connected to the inlet and outlet transition frames 3, 36, the material frame 2 is suspended and reciprocated on the transmission device, and the cartridge 42 is conveyed to the rack 2 via the sealed transfer box 41, the preheating chamber 16 and the heating off The outer walls of the gas chamber 26 and the sintering chamber 29 are respectively provided with a water-cooling tube 52 or a water-cooling jacket, a vacuuming line, an inert gas introduction line 15, a safety valve 17, a 1 ft pressure gauge 12, and a vacuum gauge 13.

As shown in FIG. 1, the preparation box 37, the glove box 39 and the tunnel-type sealed transfer box 41 are vacuum or protective atmosphere sealed boxes, respectively, and are provided with evacuation lines connected to the vacuum device, and an inert gas inflation line is provided. 1 for filling an inert gas; an isolation valve between the two adjacent boxes is provided, and the other end of the preparation box 37 is provided with a box door, and the sealed transfer box 41 is provided with a magazine 2 for loading the cartridge 42 into the loading chamber. The robot 43 (manipulator 43 is the existing structure); each box is provided with a pressure gauge and a vacuum gauge, and a balance valve line is connected between each tank, and the pressure of the two tanks is balanced by the balance valve line. The preparation box 37, the glove box 39 and the tunnel-type sealed transfer box 41 respectively have lft, 2 ft bottom roller transmissions 97, 104 and a transfer cartridge 42, which are existing structures, and are more Roller parallel transmission structure.

As shown in FIG. 8, the preparation box 37 is a vertical sealed square box, and has a box door 90 at one end, a 6 ft isolation valve 38 at one end, and a l ft deflation valve line 9 1 , 1 ft electric control cabinet on the box body 92, 1 ft viewing window 93, 1 ft inflation valve line 94 and balance gas pressure line and 2 ft pressure gauge 95; the cartridge 42 in the housing is driven by a 1 ft bottom roller drive 97.

As shown in FIG. 9, the glove box 39 is a vertical sealed square box, and one end is a 6 ft isolation valve 38 connected to the preparation box 37, and one end has a 7 ft isolation valve 40. The box body has a glove flange assembly 98 and a 2 ft observation window. 99, 2 ft electric control cabinet 100, 2 ft deflation valve line 10 1, 2 ft inflation valve line 102 and 3 ft pressure gauge 103, a 2 ft bottom roller drive 104 is provided in the casing.

As shown in FIG. 1, the tunnel type sealed transfer box 41 is a vertical sealed box connected to the side of the box of the charging chamber 44, and is provided with a deflation valve line, an inflation valve line, a pressure gauge and a bottom roller. Wheel drive. A box 42 for arranging the chips is arranged in the box. The robot 43 is loaded into the hanging rack 2; the bottom roller driving device is driven by a plurality of rollers arranged side by side.

As shown in FIG. 10, the isolation valve between the boxes is a one-way sealed flap valve structure. Package a valve housing, a third cylinder 105, and a second valve plate 110 disposed therein, a hinge plate 1 1 1 , a connecting rod 12 12, a third roller 107, a guide rail 108, and a collision block 13 13, the second The valve plate 1 10 is connected to the hinge plate 11 1 through a plurality of connecting rods 1 12 , and a guiding rail 108 is disposed in the valve box body, and a third roller 107 sliding along the guiding rail 108 is disposed on the hinge plate 11 1 . The three cylinders 105 are placed outside the valve box, the cylinder rods extend into the valve body and are connected to the hinge plate 111, the block 1 13 is placed on the valve end cover 1 14 of the valve box body, and the second valve plate 1 10 is close to the valve port. The side of the side flange 18 is provided with a rubber ring 109, the third cylinder 105 drives the hinge plate 1 1 1 to move on the guiding rail 108, the second valve plate 1 10 hits the collision block 13, and the connecting rod 1 12 pushes the second valve plate 1 10 Close to the valve port side flange 18, compressing the second apron 109 to complete the isolation and sealing action. The third cylinder 105 is provided with a third magnetic switch 106 for displaying the moving position of the second valve plate 110.

The preheating chamber 16, the heating degassing chamber 26 and the sintering chamber 29 are respectively provided with a vertical rectangular heating furnace. As shown in FIG. 2 and FIG. 3, the inner wall of the heating furnace is provided with a heat insulating layer (from top to bottom). The heat insulating layer 56, 61 and the two side heat insulating layers 59 are formed), the heat insulating layer has a plurality of heaters 60 therein, and each set of heaters 60 is provided with a thermocouple 57, and the temperature is grouped and controlled; the transmission device is arranged to be heated Outside the furnace, the upper part of the heating furnace is provided with a heat insulating plate 51 which can be opened and closed, and the first cylinder 66 is respectively connected to both sides of the heat insulating plate 51. When working, the first cylinder 66 controls the opening and closing of the heat insulating plate 51, and the material rack 2 It is placed in the heating furnace, one end is suspended on the transmission through the heat insulation board 51, and the photoelectric switch 67 is disposed on the side wall of the heating furnace to control the walking position of the material rack 2.

As shown in FIG. 2 and FIG. 3, the transmission device described in this example includes a first motor 64, a chain 63, a gear pair 50, two bearing blocks 48, two parallel rails 54, two sets of first rollers 53, two first a sprocket 49, a second sprocket 65 and a chain plate 96, the two first sprocket wheels 49 are mounted on a hinge shaft extending outside the housing through the chamber housings, the first motor 64 output shaft and the first sprocket 49 pairs are connected by a chain 63. One end of each of the two bearing blocks 48 is respectively mounted on a sprocket shaft in the casing, and the other end is connected with a shaft parallel to the sprocket shaft. The shaft and the hinge shaft are respectively equipped with cooperating gear pairs 50. The second sprocket 65 is mounted on the sprocket shaft in the housing, and the two sets of first rollers 53 placed in the two parallel guide rails 54 are connected by the roller shaft thereof, and the chain plate matched with the second sprocket 65 is mounted on the roller shaft. 96, the other end of the chain plate 96 is connected to the rack 2 link. A spring plate 62 is attached to the bearing housing 48. The other end of the spring plate 62 is connected to the housing of each chamber, and is forced to tightly connect the second sprocket 65 and the chain plate 96 during operation.

The lock chamber 10 is a vertical box, is a vacuum and atmospheric conversion chamber, is provided with an inert gas introduction line and an lft vacuum device 5, and the 1 ft vacuum device 5 is composed of a rough valve 6, a 1ft slide valve pump 7 or a rotary vane. The pump, 1 ft Roots pump 8, 1 ft bypass valve 9 and vacuum line. The rack 2 carrying the box 42 is suspended vertically in the transmission The device is driven by a speed reducer of the second motor 68 of the transmission device, and is transmitted through the transmission device. The photoelectric switch displays the position of the control rack 2, and the second motor 68 of the transmission device realizes frequency conversion speed regulation.

The loading chamber 44 is a vertical box, and has a 5 ft isolation valve 45 connected to the lock chamber 10 at one end, and an lft isolation valve 14 connected to the preheating chamber 16 at one end, and a side of the loading chamber 44 and a tunnel sealed transmission box. 41. The robot 43 in the sealed transfer case 41 houses the magazine 42 which is arranged in a row into the hanging rack 2, and the charging chamber 44 is provided with an inert gas introduction line. The rack 2 carrying the box 42 is suspended vertically on the transmission device, the photoelectric switch displays the position of the control rack 2, and the second motor 68 of the transmission realizes the frequency conversion speed regulation.

The preheating chamber 16, the heating degassing chamber 26 and the sintering chamber 29 are provided with a vertical rectangular heating furnace, and the heating furnace is provided with upper, side and lower heat insulating layers 56, 59, 61, and the heat insulating layer is internally provided. The plurality of heaters 60 are connected to the heating power source through the water-cooling electrode 58. Each group of heaters 60 has a thermocouple 57 connected to the temperature control computer in the electric control cabinet to control the output power of the external power supply of the heater to achieve heating. Temperature control of the furnace sub-zone; The transmission device is outside the heating furnace, and the upper part of the heating furnace is provided with a heat-insulating plate 5 1 for opening and closing, and the first and second sides of the heat-insulating plate 5 1 are respectively connected to the first cylinder 66 to push the partition which can be opened and closed The hot plate 51 moves, when the rack moves, the heat shield 5 1 is opened, when the rack is prohibited in the heating furnace, the heat shield 5 1 is closed; the upper chamber side wall outside the heating furnace is two parallels of the transmission The guide rail 54, the plurality of first rollers 53 of the connecting rack 2 are suspended on the guide rail 54, and the outdoor first motor 64 reducer drives the power through the sprocket chain 63 to the indoor transmission sealing sprocket shaft, and is biased by the spring plate 62. Gear pair 50 The torque transmitted to the first sprocket 49, both ends of the sub-bearing housing 48 is the gear, chain plate 2 on the first sprocket 49 toggle rack 96, rack 2 traveling drive.

The preheating chamber 16 is a vertical tank, and the outer wall is provided with a water cooling pipe 52. The upper air suction pipe flange 55 is connected to a 2 ft vacuum device, and the gas filling flange 47 is connected to the inert gas introduction pipe 15, and the safety valve nozzle flange 46. Connect the safety valve 17. Material rack 2 carrying material box 42 vertical suspension is transported on the track on the transmission device. The photoelectric switch is provided on the symmetric side plate of the upper part of the preheating chamber box to display the position of the control material rack 2 and frequency conversion speed regulation. The preheating chamber 16 is provided with a wax collecting tank, and the outer casing insulating layer can serve as a dewaxing chamber.

Each vacuum device is of the existing structure, and the 2ft, 3ft and 4ft vacuum devices 24, 27, 30 have the same structure, and are bypassed by the main valve 19, the diffusion pump 20, the 2ft Roots pump 2 1 , the 2ft spool valve 22 , 2ft Valve 23 and vacuum line; 1 ft vacuum 5 consists of rough valve 6, 1 ft bypass valve 9, 1 ft spool pump 7 and l ft Roots pump 8; 5 ft vacuum unit by slide valve pump, Roots The pump and the main valve are constructed.

As shown in Fig. 2 and Fig. 3, the heating degassing chamber 26 is a vertical tank, and the outer wall has a water-cooling pipe 52 or a water-cooling jacket, and is also connected with a 3 ft vacuum device 27, an inert gas introduction pipe, and a safety valve. Shelf 2 carrier material The box 42 is suspended vertically on its transmission device, and the heating dehydrogenation chamber is provided on the symmetrical side plate. The heating furnace is equipped with an on-beam photoelectric switch, which displays the position of the control rack 2 and frequency conversion.

The sintering chamber 29 is a vertical tank having a water-cooled tube on the outer wall, and is connected to a 4 ft vacuum unit 30, an inert gas introduction line, and a safety valve. Material rack 2 carrying material box 42 vertical suspension is transported on the track on the transmission device, and the photoelectric switch is arranged on the symmetric side plate of the upper part of the box to display the position of the control material rack 2 and frequency conversion speed regulation.

As shown in FIG. 4, the cooling chamber 34 is a vertical box body, the outer wall is welded with a water-cooling tube, the side wall is provided with a second motor 68, and a wind box is inside, and a plurality of air guiding tubes 71 are disposed on the side plate of the wind box. The other side has a heat exchanger 70, the air outlet of the heat exchanger 70 is opposite to the fan 33, the fan 33 is connected to the shaft of the second motor 68, and the arc-shaped baffle 72 is arranged around the wall of the cooling chamber; Pipeline, inert gas introduction pipe and safety valve pipe; vacuum pipe is connected with 5ft vacuum device 32; material frame 2 carrying material box 42 is suspended vertically on the transmission device, photoelectric switch display control material frame 2 position, frequency conversion speed.

The isolation valve between the chambers is a one-way sealed isolation flapper valve, as shown in FIG. 5-7, including a valve body 76, a second cylinder 73, a plurality of cylinders or cylinders 78, a first valve plate 80 and a front, The rear blind flanges 75 and 82 are respectively provided with front and rear blind flanges 75 and 82 on opposite sides of the valve body 76, and a second cylinder 73 and a cooling water pipe assembly are disposed on the outer upper portion of the front blind flange 75; the valve body 76 A first valve plate 80 is disposed in parallel with the other two sides. The first valve plate 80 is suspended from the upper portion of the valve body 76 by the valve plate traveling device, and the valve plate traveling device is rigid with the cylinder rod portion of the external second cylinder 73. Connecting, the bottom of the first valve plate 80 is provided with a second roller 83 and a bottom rail 84 thereof. The first valve plate 80 is welded with a water-cooling tube or a jacket, and the water-cooling tube or the jacket is connected to the two through the hose 87 of the cooling water pipe assembly. On the sealed rigid cooling water pipe shaft 86, the cooling water pipe shaft 86 and the cylinder rod of the second cylinder 73 are connected by the connecting rod 85, and the first valve plate 80 is displaced relative to the cooling water pipe shaft 86 when the first valve plate 80 is displaced, and the plurality of cylinders or The cylinders 78 are respectively connected to both ends of the first valve plate 80 , for locking the first valve plate 80; the second magnetic switch 77 is respectively disposed on two rows of cylinders or cylinders 78 to control the position of the first valve plate 80.

The valve plate travel device includes an upper rail 88, a roller and a hinge plate 89 disposed at an upper end of the valve body. The roller is placed in the upper rail 88 and slides along the upper rail 88. The roller hangs the first valve plate 80 on the upper rail through the hinge joint plate 89. On the 88, the sliding on the upper rail 88 is achieved. The first valve plate 80 is provided with a heat insulating plate 81 corresponding to the valve port side. The cylinder rod of the second cylinder 73 drives the first valve plate 80 to be displaced, and the position of the first valve plate 80 is controlled by the first magnetic switch 74 disposed on the second cylinder 73. The one-way seal is composed of a plurality of locking cylinders. Or the cylinder rod is applied to the first valve plate 80 to complete.

As shown in FIG. 7, the first valve plate 80 is pushed by a plurality of cylinders or cylinders 78 to ensure the first valve plate. The force is 80, the first valve plate 80 is provided with a sealed first rubber ring 79, and the first rubber ring 79 has a large compression amount to ensure the sealing performance of the large-size valve port valve plate. The front and rear blind flanges 75, 82 of the valve body 76 function to remove the first valve plate 80 from the side of the valve body 76 during maintenance.

According to the heat treatment requirements, the preheating chamber described in this example may also be equipped with a wax collection tank as a dewaxing chamber.

The working process of the present invention is as follows:

Referring to Fig. 1, the power, the power source, the circulating water for cooling, and the medium source are checked. Check that all the main and auxiliary equipment are in good condition and in working condition. The dispersing operation mode is adopted to make the equipment meet the production process state, that is, the vacuum system is started and interlocked, the inter-chamber isolation valve is closed, the compartment isolation valve, the glove box, the tunnel transmission sealing box and the charging chamber are in a protective atmosphere (oxygen content) < 500PPm), other chambers are in a vacuum state; the heater in the furnace is intact; the inert gas is set to a predetermined value, and all sensors are in a stable state of operation.

The tank door 90 is opened under atmospheric pressure, the billet is loaded into the preparation box 37, the tank door 90 is closed, the inert gas is filled in the tank, and the oxygen content is < 500 ppm _{; the} preparation tank 37 and the glove box 39 are pressure balanced, and the 6 ft isolation valve is opened. , start the transmission, the blank enters the glove box 39, closes the 6ft isolation valve 38; pulls the material in the glove box 39, loads the blank into the graphite box, and finishes the stacking of the material.

When the glove box 39 and the sealed transfer box 41 are pressure balanced, the 7ft isolation valve 40 is opened, the transmission is activated, the cassette 42 is inserted into the sealed transfer box 41, and the 7ft isolation valve 40 is closed; the cassette 42 is transported in the closed transfer box to Wait for the robot 43 before.

Open the inlet chamber door 4 under atmospheric pressure, enter the lock chamber 10 at the inlet transition frame 3, and close the inlet chamber door 4; 1 ft vacuum system 5 pairs of lock chambers 1 0 vacuum, when pressure

At 5E-2Pa, refill with inert gas.

The loading chamber 44 has no rack 2, the loading chamber 44 is pressure balanced with the lock chamber 10, the 5# isolation valve 45 is opened, the rack 2 enters the loading chamber 44, and the 5ft isolation valve 45 is closed; the transfer seal box 4 1 The robot 43 loads the cartridge 42 into the rack 2.

Preheating chamber 16 There is no rack 2, preheating chamber 16 and loading chamber 44 are pressure balanced, open 1 ft isolation valve 14, rack 2 enters preheating chamber 16, closes l ft isolation valve 14. 2ft vacuum unit 24 vacuums the preheating chamber to l Pa and heats it to 430 °C at the heating rate required by the process.

The 3 ft vacuum unit 27 evacuates the heated degassing chamber 26. When the heating degassing chamber 26 is not expected The rack 2, the preheating chamber 16 and the heating degassing chamber 26 are pressure balanced, the 2 ft isolation valve 25 is opened, the rack 2 enters the heating degassing chamber 26, the 2 ft isolation valve 25 is closed, and the heating temperature of the degassing chamber 26 is heated 850. °C.

The 4 ft vacuum unit 30 vacuums the sintering chamber 29. When the sintering chamber 29 has no rack 2, the sintering chamber 29 and the heating degassing chamber 26 are pressure balanced, the 3 ft isolation valve 28 is opened, the rack 2 enters the sintering chamber 29, and the 3 ft isolation valve 28 is closed. The heating temperature of the sintering chamber is 1080 °. C.

The 5 ft vacuum unit 32 draws a vacuum on the cooling chamber 34. When the pressure between the sintering chamber 29 and the cooling chamber 34 is balanced, the cooling chamber 34 has no rack 2, the 4ft isolation valve 3 is opened, the rack 2 enters the cooling chamber 34, and the 4ft isolation valve 3 1 is closed. Filled with inert gas, when the pressure reaches 0. O lMpa, the starter fan 33 starts to forcibly cool the magnet block in the magazine and the cartridge.

The magnet block in the cartridge 42 and the cartridge 42 is cooled to below 80 ° C. When the pressure of the cooling chamber 34 is atmospheric pressure, the outlet door 35 is opened, and the rack 2 enters the outlet transition frame 36.

The rack 2 passes through the return frame and enters the transition frame 3 of the inlet, waiting.

The conveyance of the rack 2 between the chambers is driven by a motor, and the power is introduced into the transmission shaft of the gear pair 50 in the vacuum chamber through the sealed transmission shaft, and transmitted to the first sprocket 49 through the bearing housing 48 and the gear pair 50. Above, the spring plate 62 is forced to the shaft of the rack 2, the first roller 53 on the rack 2 travels on the guide rail 54, and the photoelectric switch 67 is a limit switch.

In production, the control system continuously scans the condition of the equipment and automatically runs according to pre-programmed procedures. The entire operation is done on the human machine interface of the computer.

The display of the electrical control system or system can provide the following information: operating status of the vacuum pump, vacuum valve and vacuum line vacuum; drive and display rack 2 transport and operating status; drive and display inter-chamber valve and oven operating status; Vacuum, pressure and heating temperature of each independent vacuum chamber; medium gas operating state, safety valve status; actual cooling water, power gas pressure, medium gas alarm; alarm management; display all relevant process parameters (setpoint and actual) Value); Parameter input; Historical process parameters / data display and storage; All major components of the device can be operated through the display.

The product performance pairs obtained according to the process method of the present invention and the existing process methods are as follows:

Comparative Example: 18% by weight of Nd, 8.5%Pr, 3%Dy, 1.02%B, 0.3%A1, the balance is Fe, after smelting, hydrogen crushing, jet milling, Magnetic field forming press, pressure After the preparation, the billet is evacuated and sintered in a single-chamber sintering furnace equipped with a protective glove box. The temperature is raised to 430 ° C for heat preservation and degassing for 3 hours. The vacuum is higher than lPa. After the heat preservation, the temperature is raised to 850 ° C. After 2 hours, the temperature was raised to 1080 ° C for vacuum sintering for 2 hours, and the degree of vacuum reached E-2Pa, and then aging at 900 ° C for two hours and 500 ° C for four hours.

Example 1: Sintering was carried out by using the same sintering ratio method as in the comparative example, using the continuous sintering process of the present invention and its sintering apparatus.

The specific implementation steps are as follows:

(1) The press-formed rare earth permanent magnet powder alloy blank is subjected to an air-packaging treatment, and is sent to a preparation box 37, which closes the tank door 90, and evacuates or fills the air in the inert gas to replace the air in the tank; when the preparation box 37 and the glove box 39 are prepared Pressure balance, open the 6ft isolation valve 38 between the boxes, transfer the packaged blank to the glove box 39, close the box 6ft isolation valve 38; place the blank in the glove box 39 into the magazine 42, the cartridge 42 is arranged in a row; When the pressure of the glove box 39 and the sealed transfer box 41 is balanced, the 7ft isolation valve 40 is opened, the cassette 42 is conveyed to the sealed transfer box 41, and the 7ft isolation valve 40 is closed; the cassette 42 is transferred to the cassette At the robot 43 at the interface with the loading chamber 44, the cartridge 42 is loaded into the rack 2 in the loading chamber 44 by the robot 43; in the above process, the oxygen content of each tank and the charging chamber is <50 (^?111 _;

(2) When the charging chamber 44 is pressure balanced with the preheating chamber 16, open the 1ft isolation valve 14 between the chambers, the rack 2 is transferred to the preheating chamber 16, and the 1ft isolation valve 14 is closed; the vacuum is started, when the vacuum is higher than lPa At the beginning, start heating to 430 ° C, keep warm for 3 hours;

(3) The heating degassing chamber 26 is in a vacuum state, the heating temperature is 400 ° C, the inter-chamber 2 ft isolation valve 25 is opened, the material rack 2 is transferred to the heating degassing chamber 26, and the 2ft isolation valve 25 is closed; the temperature in the heating furnace is from 430°. C ~ 850 °C take multiple heating and heat preservation for 2 hours, the vacuum degree reaches 3E-2Pa _;

(4) The sintering chamber is in a vacuum state, the heating temperature is up to 850 ° C, the inter-chamber 3 ft isolation valve 28 is opened, the material rack 2 is transferred to the heating degassing chamber 26, and the 3 ft isolation valve 28 is closed; when the vacuum degree is higher than 3E-2Pa , continue to heat up, the heating temperature is sintered to 1080 ° C, the degree of vacuum reaches E-2Pa level;

The ventilating chamber 34 is in a vacuum state, the chamber 4ft isolation valve 31 is opened, the rack 2 is transferred to the cooling chamber 34, the 4 ft isolation valve 31 is closed, and the nitrogen or argon gas is charged to 0. OlMPa, The moving fan 33 cools the rare earth permanent magnet alloy in the cartridge 42 and the cartridge 42 and cools it to below 80 ° C; when the chamber pressure is balanced to atmospheric pressure, the outlet chamber door 35 is opened, and the rack 2 is transferred to the outlet end. The transition frame 36 is closed, and the outlet door 35 is closed; the cartridge 42 in the rack 2 is taken out from the rack 2;

(6) The rack 2 enters the inlet transition frame 3 via the return frame, the lock chamber 10 is inflated to atmospheric pressure, opens into the end chamber door 4, the rack 2 is transferred to the lock chamber 10, and the end chamber door 4 is evacuated to lPa. The inert gas is filled. When the lock chamber 10 and the charging chamber 44 are pressure balanced, the 5 ft isolation valve 45 is opened between the chambers, and the rack 2 is transferred to the charging chamber 44 to wait for loading the cartridge, and the 5 ft isolation valve 45 is closed.

The invention can also add step (7). After the cooling chamber, an aging chamber can be connected in series through the isolation valve, and the material rack is transferred to the aging chamber at a heating temperature of 900 ° C for 2 hours; the heating temperature is 500 ° C, time. 4 hours.

The invention can also add step (8). After the aging chamber, a cooling chamber 2 can be connected in series through the isolation valve, and the rack is transferred to the cooling chamber 2; nitrogen or argon gas is charged to 0.01 MPa to 0.09 MPa, and the fan pair is activated. The rare earth permanent magnet alloy in the cartridge and the cartridge is cooled and cooled to below 80 ° C; when the chamber pressure is balanced to atmospheric pressure, the outlet chamber door 35 is opened, the rack 2 is transferred to the outlet transition frame 36, and the outlet end is closed. The door 35; the cartridge 42 in the rack 2 is taken out from the rack 2.

Example 2: Sintering and aging were carried out by the continuous sintering process of Example 1 using the same material ratio as in the comparative example. The preheating chamber is evacuated. When the vacuum is higher than lPa, the heating is started to 400 °C for 3 hours. The temperature of the degassing heating chamber is increased from 450 °C to 800 °C, and the temperature is maintained at 800 °C. Hours, the degree of vacuum reached 3E-2Pa; the temperature was further increased, and the temperature in the sintering chamber was heated to 1080 ° C for 2 hours, and the degree of vacuum reached E-2Pa; and the aging was carried out by the aging method in Example 1.

Example 3: Sintering and aging were carried out by the continuous sintering process of Example 1 using the same material ratio as in the comparative example. The preheating chamber is evacuated. When the vacuum is higher than lPa, the heating is started to 500 °C for 3 hours. The temperature of the degassing heating chamber is increased from 500 °C to 850 °C, and the temperature is raised at 850 °C. Hours, the degree of vacuum reached 3E-2Pa; the temperature was further increased, and the temperature in the sintering chamber was heated to 1080 ° C for 2 hours, and the degree of vacuum reached E-2Pa; and the aging was carried out by the aging method in Example 1. Example 4: Sintering and aging were carried out by the continuous sintering process of Example 1 using the same material ratio as in the comparative example. The preheating chamber is evacuated. When the vacuum is higher than l Pa, the heating is started to 500 °C for 3 hours. The temperature of the degassing heating chamber is increased from 500 °C to 900 °C, and the temperature is raised at 900 °C. Hours, the degree of vacuum reached 3 E-2Pa; the temperature was raised, the temperature in the sintering chamber was heated to 1 080 ° C for 2 hours, and the degree of vacuum reached E-2Pa; and the aging method in Example 1 was used for aging.

It can be seen from the above examples that the rare earth alloy improves the magnetic performance through the continuous sintering process, and the degree of automation of production is greatly improved.

Those skilled in the art should be able to understand the essence of the present invention, and recognize that the specific implementation details of the present invention can make various changes such as expanding a plurality of heating degassing chambers, sintering chambers, and cooling chambers within the scope of the claims. .

Claims

Rights request

1. A continuous sintering process method for rare earth permanent magnet alloys, which is characterized by: including the following steps:

(1) The pressed rare earth permanent magnet powder alloy billet is packaged in an air-isolated manner, transferred to the preparation box, the box door is closed, and the air in the box is evacuated or filled with inert gas; when the pressures of the preparation box and glove box are balanced, Open the 6ft isolation valve between the boxes, transfer the packaged blanks to the glove box, and close the 6ft isolation valve between the boxes; Unpack the blanks and put them into the boxes in the glove box, and arrange the box numbers into stacks; When the glove box and the transfer seal box To balance the pressure, open the 7ft isolation valve between the boxes, transfer the stacked boxes to the transmission seal box, close the 7ft isolation valve between the boxes; transfer the stacked boxes to the manipulator at the interface with the loading room, and the manipulator will transfer the materials The boxes are loaded into the material rack in the loading chamber; In the above process, the oxygen content of each box and the loading chamber is <50(^?111 _;

(2) When the pressure of the charging chamber and the preheating chamber is balanced, open the 1ft isolation valve between the chambers, transfer the material rack to the preheating chamber, close the 1ft isolation valve; start vacuuming, and when the vacuum degree is higher than lPa, start heating to 400 -500°C, keep warm for 1-3 hours;

(3) The heating degassing chamber is in a vacuum state, the heating temperature is 400-500°C, and the chamber is opened

2ft isolation valve, the material rack is transferred to the heating degassing chamber, and the 2ft isolation valve is closed; the temperature in the heating furnace is heated in multiple stages from 400°C to 900°C for 2-4 hours, and the vacuum reaches 3E_2Pa;

(4) The sintering chamber is in a vacuum state, heating temperature to 850°C, open the 3ft isolation valve between chambers, transfer the material rack to the heating degassing chamber, close the 3ft isolation valve; when the vacuum degree is higher than 3E-2Pa, continue to heat up, Heating temperature to 1020°C~1080°C for sintering, time 2~4 hours, vacuum degree reaches 1E-2Pa;

(5) The cooling chamber is in a vacuum state, open the 4ft isolation valve between the rooms, transfer the material rack to the cooling chamber, close the 4ft isolation valve; fill with nitrogen or argon to 0.01MPa~0.19MPa, start the fan to blow the material box and the material inside the box The rare earth permanent magnet alloy is cooled to below 80°C; when the chamber pressure is balanced to atmospheric pressure, the outlet chamber door is opened, the material rack is transferred to the outlet transition rack, and the outlet chamber door is closed; the material box in the material rack is Take it out from the material rack;

(6) The material rack enters the inlet transition frame through the return line, and the lock chamber is inflated and balanced to atmospheric pressure. Open the inlet end chamber door, and the material rack is transferred to the lock chamber. Close the inlet end chamber door and evacuate to lPa, then fill it with inert gas. The pressures of the lock chamber and the loading chamber are balanced, the 5ft isolation valve between the chambers is opened, the material rack is transferred to the charging chamber to wait for loading of the material box, and the 5ft isolation valve is closed. 2. The continuous sintering process method of rare earth permanent magnet alloy according to claim 1, characterized in that: it also includes step (7): after the cooling chamber, an aging chamber is connected in series through an isolation valve, and the material rack is transferred to the aging chamber, and heated Temperature 800°C~900°C, time 2~4 hours; heating temperature 450°C~550°C, time 2~4 hours.

3. The continuous sintering process method of rare earth permanent magnet alloy according to claim 1, characterized in that: it also includes step (8), a cooling chamber (2) is connected in series through an isolation valve after the aging chamber, and the material rack is transferred to the cooling chamber. Chamber (2); fill with nitrogen or argon to 0.01MPa~0.19MPa, start the fan to cool the material box and the rare earth permanent magnet alloy in the material box to below 80 °C; when the chamber pressure is balanced to Atmospheric pressure, open the outlet chamber door, transfer the material rack to the outlet transition rack, close the outlet chamber door; take out the material box in the material rack from the material rack.

4. Sintering equipment using the rare earth permanent magnet alloy continuous sintering process as claimed in claim 1, which is characterized by: a preparation box, a glove box, a sealed transfer box arranged in sequence, and a lock chamber, a charging chamber, and It consists of a preheating chamber, a heating degassing chamber, a sintering chamber, a cooling chamber, a transmission device for each chamber, a return frame and a vacuum device. Each chamber is connected through an isolation valve between the chambers, and the sealed transfer box is connected to the charging chamber; The transmission device of each chamber is set at the upper part of each chamber. Each outdoor room is equipped with a return frame with a transmission device. The return frame is connected to the transition frame at the inlet and outlet. The material rack is suspended on the transmission device and circulates back and forth. The material box is sealed. The transfer box is transferred to the material rack. The walls of the preheating chamber, heating degassing chamber and sintering chamber are respectively equipped with water-cooling pipes or water-cooling jackets, vacuum pipes, inert gas introduction pipes, safety valves and pressure gauges.

5. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the preheating chamber, the heating degassing chamber and the sintering chamber are each equipped with a vertical rectangular heating furnace, and the inner wall of the heating furnace is equipped with There is a heat insulation layer, and there are multiple sets of heaters inside the heat insulation layer. Each set of heaters is equipped with a thermocouple, and the temperature is controlled in groups; the transmission device is set outside the heating furnace, and the upper part of the heating furnace is provided with a partition that can be opened and closed left and right. hot plate.

6. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the isolation valve between the chambers is a one-way sealing gate valve, including a valve body, a second cylinder, a plurality of cylinders or oil cylinders, The first valve plate and the front and rear blind flanges, wherein the valve body is provided with front and rear blind flanges respectively on both sides, and the outer upper part of the front blind flange is provided with a second cylinder and a cooling water pipe assembly; the valve body is provided with a In addition, the first valve plate is parallel on both sides. The first valve plate is suspended from the upper part of the valve body through the valve plate traveling device. The valve plate traveling device is rigidly connected to the cylinder rod head part of the external second cylinder. The bottom of the first valve plate is provided with The second roller and its bottom guide rail, the first valve plate are welded with a water-cooling pipe or jacket, and the water-cooling pipe or jacket is connected through the hose of the cooling water pipe assembly. Connected to two sealed rigid cooling water pipe shafts, the cooling water pipe shaft is connected to the cylinder rod of the second cylinder to achieve linkage. When the first valve plate is displaced, it is relatively stationary with the cooling water pipe shaft. Multiple cylinders or oil cylinders are connected to the first valve respectively. The two ends of the plate are connected and locked to the first valve plate to achieve sealing.

7. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the side wall of the cooling chamber is provided with a second motor, and there is a wind box inside, and the side plates of the wind box have a plurality of guide tubes, corresponding to There is a heat exchanger on the other side. The air outlet of the heat exchanger faces the air inlet of the fan. The fan is connected to the second motor shaft. There is an arc deflector around the wall of the cooling chamber; the external connection is an evacuation pipeline and an inert gas introduction pipe. pipeline and safety valve pipeline; the vacuum pipeline is connected to the vacuum device.

8. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the preheating chamber is equipped with a wax collection tank as a dewaxing chamber.

9. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the transmission device includes a first motor, a chain, a gear pair, two bearing seats, two parallel guide rails, two sets of first rollers, two The first sprocket, the second sprocket and the chain plate. The two first sprockets are installed on the hinge shaft that passes through the housing of each chamber and extends out of the housing. The first motor output shaft and the first sprocket are connected by a chain. connection, one end of the two bearing seats is installed on the sprocket shaft in the housing, and the other end is connected to a shaft parallel to the hinge shaft. The shaft and the hinge shaft are respectively equipped with matching gear pairs, and the second sprocket is installed on the housing. On the sprocket shaft in the body, two sets of first rollers placed in two parallel guide rails are connected through their roller shafts. A chain plate matching the second sprocket is installed on the roller shaft. The other end of the chain plate is connected to the material rack. pole.

10. The rare earth permanent magnet alloy continuous sintering equipment according to claim 9, characterized in that: a spring plate is connected to the bearing seat, and the other end of the spring plate is connected to the shell of each chamber. During operation, the spring plate is forced to The second sprocket and the chain plate are tightly connected.

11. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the preparation box, glove box and tunnel transmission sealed box are vacuum or protective atmosphere sealed boxes, respectively equipped with evacuation pipeline connections The vacuum device is equipped with an inert gas inflation pipeline connected to the inert gas system; two adjacent boxes are equipped with isolation valves between the boxes, a door is provided at the other end of the preparation box, and a manipulator is installed in the transmission sealed box to load the material box into the container. Material rack in the material chamber; each box is equipped with a pressure gauge and vacuum gauge, and a balance valve pipeline is connected between two adjacent boxes to balance the pressure of the two boxes through the balance valve pipeline.

12. The rare earth permanent magnet alloy continuous sintering equipment according to claim 4, characterized in that: the box isolation valve includes a valve box body, a third cylinder and a second valve plate, a hinge plate and a connecting rod arranged inside it. , the third roller, the guide track and the impact block, the second valve plate passes through multiple connecting rods Connected to the hinge plate, the valve box is provided with a guide track, and the hinge plate is provided with a third roller that slides along the guide track. The third cylinder is placed outside the valve box, and its cylinder rod extends into the valve body to connect with the hinge plate. , the impact block is placed on the valve end cover in the valve box, the second valve plate is equipped with a rubber ring at the flange end near the valve port side, the third cylinder drives the hinge plate to move on the guide roller track, the second valve plate hits the impact block, The connecting rod pushes the second valve plate closer to the valve port side flange, and compresses the rubber ring to complete the isolation and sealing function.