CN114551082B - Cold treatment device for neodymium-iron-boron magnet and processing method thereof - Google Patents
Cold treatment device for neodymium-iron-boron magnet and processing method thereof Download PDFInfo
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- CN114551082B CN114551082B CN202210229464.4A CN202210229464A CN114551082B CN 114551082 B CN114551082 B CN 114551082B CN 202210229464 A CN202210229464 A CN 202210229464A CN 114551082 B CN114551082 B CN 114551082B
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/045—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/048—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by pulverising a quenched ribbon
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Abstract
The invention discloses a cold treatment device of a neodymium iron boron magnet and a processing method thereof, wherein the cold treatment device comprises a melt-spinning furnace, a stirring furnace, a soaking furnace, a profiling furnace, a first conveying pipe, a second conveying pipe, a third conveying pipe, a first pressure pump, a second pressure pump and a third pressure pump, the melt-spinning furnace comprises a melt-spinning furnace inner cavity, a preheating layer, an evacuating pump, an evacuating pipe and a melt-spinning furnace base, and the stirring furnace comprises a stirring furnace inner cavity, a cooling layer, a stirring device, a stirring furnace base, a stirring motor, a stirring shaft and stirring blades. According to the cold treatment device and the processing method of the neodymium-iron-boron magnet, the nitrogen spraying device in the soaking furnace can perform cold treatment on the neodymium-iron-boron magnet in liquid nitrogen, crystal grains and grain boundary phases on the surface layer of the neodymium-iron-boron magnet cannot be damaged, the compression furnace can increase magnetism of the neodymium-iron-boron magnet, the neodymium-iron-boron magnet has a wide hysteresis loop, high coercivity and high remanence, and the controller can control soaking time in the soaking furnace and set time of the powder making device and the compression machine.
Description
Technical Field
The invention relates to the technical field of cold treatment devices, in particular to a cold treatment device for a neodymium iron boron magnet and a processing method thereof.
Background
The NdFeB serving as one of the rare earth permanent magnet materials has extremely high magnetic energy product and coercive force, and meanwhile, the NdFeB permanent magnet material has wide application in modern industry and electronic technology due to the advantages of high energy density, so that the miniaturization, light weight and thinning of equipment such as instruments and meters, electroacoustic motors, magnetic separation magnetization and the like are possible. The neodymium iron boron has the advantages of high cost performance and good mechanical properties; the defects are that the working temperature is low, the temperature characteristic is poor, the pulverization and the corrosion are easy, and the requirements of practical application can be met by adjusting the chemical components and adopting certain treatment to improve the related performance.
In the prior art, aiming at the cold treatment process required to be carried out on the neodymium-iron-boron magnet, the current cold treatment machine can only carry out cold treatment on the neodymium-iron-boron magnet with one magnetic flux, can not be applied to the working environment with multiple scenes, and in the treatment process, the crystal grains and the grain boundary phases on the surface layer of the neodymium-iron-boron magnet are easily damaged, the magnetic performance of the neodymium-iron-boron magnet is damaged, and the neodymium-iron-boron magnet induces tiny tissue change and stress redistribution; meanwhile, the neodymium-iron-boron magnet is enabled to lose a wide hysteresis loop, high coercivity and high remanence in the profiling process.
Disclosure of Invention
The invention aims to provide a cold treatment device and a processing method thereof for a neodymium iron boron magnet, wherein a nitrogen spraying device in a soaking furnace can be used for carrying out cold treatment on the neodymium iron boron magnet in liquid nitrogen, crystal grains and crystal boundary phases on the surface layer of the neodymium iron boron magnet can not be damaged, a profiling furnace can be used for increasing magnetism of the neodymium iron boron magnet, the neodymium iron boron magnet has a wide hysteresis loop, high coercivity and high remanence, controllers are arranged at the outer ends of the soaking furnace and the profiling furnace, the soaking time in the soaking furnace can be controlled, and the time length of a pulverizing device and a profiling machine can be set, so that the technical problems described in the background art can be solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a cold treatment device of neodymium iron boron magnetism body, including the melt-spun stove, the stirring stove, soak the stove, the profiling stove, first conveyer pipe, the second conveyer pipe, the third conveyer pipe, first pressure pump, second pressure pump and third pressure pump, the melt-spun stove links to each other with the stirring stove through first conveyer pipe, install first pressure pump on the first conveyer pipe, the stirring stove links to each other with the soaking stove through the second conveyer pipe, install the second pressure pump on the second conveyer pipe, the soaking stove links to each other with the profiling stove through the third conveyer pipe, install the third pressure pump on the third conveyer pipe, the melt-spun stove includes the melt-spun stove inner chamber, the pre-heating layer, the pump of evacuating, evacuation pipe and melt-spun stove base, the melt-spun stove inner chamber has been seted up to melt-spun stove one side, the stirring stove includes the stirring stove inner chamber, the cooling layer, agitating unit, the stirring stove base, the agitator motor, stirring axle and stirring vane, the stirring stove inner chamber has been seted up to the stirring stove inner chamber, the soaking stove includes the nitrogen motor, soak stove inner chamber, the nitrogen spraying unit, soak stove support frame and soaking stove nitrogen pipe, the soaking stove is connected with the profiling stove through the third conveyer pipe, the third conveyer pipe is equipped with the third pressure pump, the melt-spun stove inner chamber has been seted up to the melt-spun stove inner chamber including the melt-spun stove inner chamber, the powder process inner chamber has been set up, the profiling device inner chamber has been set up in the profiling press inner chamber.
Preferably, one end of the first conveying pipe is connected with one side of the melt-spun furnace, the other end of the first conveying pipe is connected with one side of the stirring furnace, the middle end of the first conveying pipe is provided with a first pressure pump, one end of the second conveying pipe is connected with one side of the stirring furnace, the other end of the second conveying pipe is connected with one side of the soaking furnace, the middle end of the second conveying pipe is provided with a second pressure pump, one end of the third conveying pipe is connected with one side of the soaking furnace, the other end of the third conveying pipe is connected with one side of the profiling furnace, and the middle end of the third conveying pipe is provided with a third pressure pump.
Preferably, a preheating layer is arranged between the inner cavity of the melt-spun furnace and the melt-spun furnace, which are arranged in the melt-spun furnace, the upper end of the outer wall of one side of the melt-spun furnace is connected with one end of an evacuating pipe, one end of the evacuating pipe extends into the inner cavity of the melt-spun furnace, an evacuating pump is arranged on the evacuating pipe, the bottom end of the outer wall of the other side of the melt-spun furnace is connected with one end of a first conveying pipe, one end of the first conveying pipe extends into the inner cavity of the melt-spun furnace, and the bottom end of the melt-spun furnace is connected with the upper end of the base of the melt-spun furnace.
Preferably, a cooling layer is arranged between an inner cavity of the stirring furnace and the stirring furnace, a stirring device is arranged in the inner cavity of the stirring furnace, a stirring motor is arranged at the top end of the stirring furnace, the bottom end of the stirring motor is connected with the upper end of the stirring shaft, a plurality of stirring blades are arranged on the outer wall of the stirring shaft, the bottom end of the stirring furnace is connected with the upper end of the stirring furnace base, the bottom end of the outer wall of one side of the stirring furnace is connected with one end of a first conveying pipe, the first conveying pipe extends into the inner cavity of the stirring furnace, the bottom end of the outer wall of the other side of the stirring furnace is connected with one end of a second conveying pipe, and the second conveying pipe extends into the second conveying pipe.
Preferably, the nitrogen spraying device is arranged in the inner cavity of the soaking furnace, a plurality of groups of nitrogen spraying pipes are arranged on the outer wall of the nitrogen spraying device, a plurality of holes are formed in the nitrogen spraying pipes, the bottom end of the soaking furnace is connected with the upper end of a supporting frame of the soaking furnace, a plurality of groups of supporting frames of the soaking furnace are arranged, the bottom end of the soaking furnace is connected with one end of a third conveying pipe, and the third conveying pipe extends into the inner cavity of the soaking furnace.
Preferably, the upper end of the inner cavity of the compression furnace is provided with a powder making device, the powder making device comprises a powder making disc, powder grinding rods, powder leakage holes and fixing columns, the powder making disc is arranged at the upper end of the inner cavity of the compression furnace, a plurality of groups of powder grinding rods are arranged at the top end of the powder making disc, the plurality of powder leakage holes are formed in the upper end of the powder making disc, and the bottom end of the powder making disc is connected with the upper end of the fixing columns.
Preferably, the profiling machine is arranged below the inner cavity of the profiling furnace, the profiling machine comprises a screen disc, a lifting rod and a chassis, the upper end of the screen disc is connected with the bottom end of the powder making device, the bottom end of the screen disc is connected with the upper end of the lifting rod, the bottom end of the lifting rod is connected with the upper end of the chassis, the bottom end of the profiling furnace is connected with the upper end of a supporting frame of the profiling furnace, and a plurality of groups of supporting frames of the profiling furnace are arranged.
Preferably, the outer end of the soaking furnace is provided with a soaking furnace controller, and the soaking time in the soaking furnace can be set through the controller arranged outside the soaking furnace.
Preferably, the outer end of the compacting furnace is provided with a compacting furnace controller, and the duration of the powder making device and the duration of the compacting machine can be respectively set through the controller arranged outside the compacting furnace.
The invention provides another technical scheme, an implementation method of a cold treatment device of a neodymium iron boron magnet, which comprises the following steps:
further, putting the neodymium-iron-boron magnet into a melt-spinning furnace, then starting an evacuating pump, evacuating oxygen in the cavity of the melt-spinning furnace through an evacuating pipe, continuously heating the neodymium-iron-boron magnet in the cavity of the melt-spinning furnace by a preheating layer, and conveying the neodymium-iron-boron magnet into a stirring furnace through a first conveying pipe after heating;
further, the stirring device is started after the stirring rod is sent to a stirring furnace, the stirring blade stirs the neodymium-iron-boron magnet through a stirring shaft, meanwhile, the cooling layer can continuously cool the neodymium-iron-boron magnet, and the neodymium-iron-boron magnet is transported to the soaking furnace through a second transport pipe after the stirring is completed;
further, after the neodymium-iron-boron magnet enters the soaking furnace, nitrogen spraying and soaking are carried out on the neodymium-iron-boron magnet through a nitrogen spraying device, the soaking time can be set through a controller, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into the profiling furnace through a third conveying pipe;
further, after the neodymium-iron-boron magnet is sent to the profiling furnace, the neodymium-iron-boron magnet is crushed through the powder making device, and falls onto the screen disc from the powder leakage hole after crushing, and then falls onto the upper end of the chassis through the screen disc, and the chassis is lifted through the lifting rod, and the neodymium-iron-boron magnet crushed at the upper end of the chassis is profiled.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the cold treatment device and the processing method of the neodymium-iron-boron magnet, provided by the invention, the nitrogen spraying device in the soaking furnace can be used for carrying out cold treatment on the neodymium-iron-boron magnet in liquid nitrogen, so that crystal grains and grain boundary phases on the surface layer of the neodymium-iron-boron magnet are not damaged, the magnetic performance of the neodymium-iron-boron magnet can be protected, and further, on the premise of not damaging the neodymium-iron-boron magnet, the neodymium-iron-boron magnet can be induced to have fine structural changes and stress redistributed, and the performance of a material is improved.
2. According to the cold treatment device and the processing method of the neodymium-iron-boron magnet, provided by the invention, the magnetism of the neodymium-iron-boron magnet can be increased by the molding furnace, so that the neodymium-iron-boron magnet has a wide hysteresis loop, a high coercivity and a high remanence.
3. According to the cold treatment device and the processing method for the neodymium-iron-boron magnet, the controllers are arranged at the outer ends of the soaking furnace and the pressing furnace, so that the soaking time in the soaking furnace and the time of the powder making device and the pressing machine can be controlled, the neodymium-iron-boron magnets with different magnetic fluxes are required to be soaked in different time, pressed time and pressure intensity, and the cold treatment device is suitable for cold treatment processing of neodymium-iron-boron magnets with various types.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the belt casting furnace of the invention;
FIG. 3 is a schematic view of the internal structure of the stirring furnace according to the present invention;
FIG. 4 is a schematic view showing the internal structure of the soaking furnace according to the present invention;
FIG. 5 is a schematic view of the internal structure of the press furnace of the present invention;
FIG. 6 is a schematic diagram of an embodiment of the present invention;
FIG. 7 is a schematic diagram of a second embodiment of the present invention;
FIG. 8 is a schematic diagram of a third embodiment of the present invention;
FIG. 9 is a schematic diagram of an embodiment of the present invention;
fig. 10 is a schematic diagram of an embodiment of the present invention.
In the figure: 1. a belt-throwing furnace; 101. an inner cavity of the melt-spun furnace; 102. preheating the layer; 103. an evacuation pump; 104. an evacuation tube; 105. a base of the melt-spun furnace; 2. a stirring furnace; 201. an inner cavity of the stirring furnace; 202. a cooling layer; 203. a stirring device; 204. a stirring furnace base; 205. a stirring motor; 206. a stirring shaft; 207. stirring blades; 3. a soaking furnace; 301. a nitrogen spraying motor; 302. an inner cavity of the soaking furnace; 303. a nitrogen spraying device; 304. a supporting frame of the soaking furnace; 305. nitrogen spraying pipe; 4. a profiling furnace; 401. an inner cavity of the profiling furnace; 402. a pulverizing device; 4021. a pulverizing disc; 4022. a powder grinding rod; 4023. powder leakage holes; 4024. fixing the column; 403. a molding press; 4031. a screen tray; 4032. a lifting rod; 4033. a chassis; 404. a support frame of the profiling furnace; 5. a first transport tube; 6. a second transport tube; 7. a third transport tube; 8. a first pressure pump; 9. a second pressure pump; 10. and a third pressure pump.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-10, a cold treatment device for neodymium iron boron magnet comprises a belt casting furnace 1, a stirring furnace 2, a soaking furnace 3, a profiling furnace 4, a first transporting pipe 5, a second transporting pipe 6, a third transporting pipe 7, a first pressure pump 8, a second pressure pump 9 and a third pressure pump 10, wherein the belt casting furnace 1 is connected with the stirring furnace 2 through the first transporting pipe 5, the first pressure pump 8 is arranged on the first transporting pipe 5, the stirring furnace 2 is connected with the soaking furnace 3 through the second transporting pipe 6, the second pressure pump 9 is arranged on the second transporting pipe 6, the soaking furnace 3 is connected with the profiling furnace 4 through the third transporting pipe 7, the third pressure pump 10 is arranged on the third transporting pipe 7, one end of the first transporting pipe 5 is connected with one side of the belt casting furnace 1, the other end of the first transporting pipe 5 is connected with one side of the stirring furnace 2, the first pressure pump 8 is arranged at the middle end of the first transporting pipe 5, one end of the second conveying pipe 6 is connected with one side of the stirring furnace 2, the other end of the second conveying pipe 6 is connected with one side of the soaking furnace 3, a second pressure pump 9 is arranged at the middle end of the second conveying pipe 6, one end of the third conveying pipe 7 is connected with one side of the soaking furnace 3, the other end of the third conveying pipe 7 is connected with one side of the profiling furnace 4, a third pressure pump 10 is arranged at the middle end of the third conveying pipe 7, the belt casting furnace 1 comprises a belt casting furnace cavity 101, a preheating layer 102, an evacuating pump 103, an evacuating pipe 104 and a belt casting furnace bottom seat 105, a belt casting furnace cavity 101 is formed in the belt casting furnace 1, an evacuating pump 103 is arranged at one side of the belt casting furnace 1, a preheating layer 102 is arranged between the belt casting furnace cavity 101 formed in the belt casting furnace 1 and the belt casting furnace 1, the upper end of the outer wall of one side of the belt casting furnace 1 is connected with one end of the evacuating pipe 104, one end of the evacuating pipe 104 extends into the belt casting furnace cavity 101, the evacuating pump 103 is arranged on the evacuating pipe 104, the bottom end of the outer wall of the other side of the melt-spun furnace 1 is connected with one end of a first conveying pipe 5, one end of the first conveying pipe 5 extends into a melt-spun furnace inner cavity 101, the bottom end of the melt-spun furnace 1 is connected with the upper end of a melt-spun furnace base 105, the stirring furnace 2 comprises a stirring furnace inner cavity 201, a cooling layer 202, a stirring device 203, a stirring furnace base 204, a stirring motor 205, a stirring shaft 206 and stirring blades 207, the stirring furnace inner cavity 201 is formed in the stirring furnace 2, a cooling layer 202 is arranged between the stirring furnace inner cavity 201 formed in the stirring furnace 2 and the stirring furnace 2, the stirring device 203 is arranged in the stirring furnace inner cavity 201, the stirring motor 205 is arranged at the top end of the stirring furnace 2, the bottom end of the stirring motor 205 is connected with the upper end of the stirring shaft 206, the outer wall of the stirring shaft 206 is provided with a plurality of stirring blades 207, the bottom end of the stirring furnace 2 is connected with the upper end of the stirring furnace base 204, the bottom end of the outer wall of one side of the stirring furnace 2 is connected with one end of the first conveying pipe 5, the first transport pipe 5 extends into the stirring furnace cavity 201, the bottom end of the outer wall of the other side of the stirring furnace 2 is connected with one end of the second transport pipe 6, the second transport pipe 6 extends into the second transport pipe 6, the soaking furnace 3 comprises a nitrogen spraying motor 301, a soaking furnace cavity 302, a nitrogen spraying device 303, a soaking furnace support frame 304 and a nitrogen spraying pipe 305, a soaking furnace 3 controller is arranged at the outer end of the soaking furnace 3, the soaking time in the soaking furnace 3 can be set through the controller arranged outside the soaking furnace 3, a soaking furnace cavity 302 is arranged inside the soaking furnace 3, a nitrogen spraying device 303 is arranged in the soaking furnace cavity 302, a plurality of groups of nitrogen spraying pipes 305 are arranged on the outer wall of the nitrogen spraying device 303, a plurality of holes are formed in the nitrogen spraying pipes 305, the bottom end of the soaking furnace 3 is connected with the upper end of the soaking furnace support frame 304, a plurality of groups of the soaking furnace support frame 304 are arranged, the bottom end of the soaking furnace 3 is connected with one end of a third conveying pipe 7, the third conveying pipe 7 extends into the soaking furnace inner cavity 302, the compression furnace 4 comprises a compression furnace inner cavity 401, a powder making device 402, a compression press 403 and a compression furnace supporting frame 404, a compression furnace 4 controller is arranged at the outer end of the compression furnace 4, the duration of the powder making device 402 and the compression press 403 can be respectively set by the controller arranged outside the compression furnace 4, the compression furnace inner cavity 401 is arranged in the compression furnace 4, the powder making device 402 is arranged at the upper end of the compression furnace inner cavity 401, the powder making device 402 comprises a powder making disc 4021, a powder grinding rod 4022, a powder leakage hole 4023 and a fixing column 4024, the powder making disc 4021 is arranged at the upper end of the compression furnace inner cavity 401, the powder grinding roller 4022 is arranged at the top end of the powder grinding disc 4021, a plurality of powder leakage holes 4023 are formed in the upper end of the powder grinding disc 4021, the bottom end of the powder grinding disc 4021 is connected with the upper end of a fixing column 4024, a powder grinding device 402 and a molding press 403 are arranged in a molding press cavity 401, the molding press 403 is arranged below the molding press cavity 401, the molding press 403 comprises a screen disc 4031, a lifting rod 4032 and a chassis 4033, the upper end of the screen disc 4031 is connected with the bottom end of the powder grinding device 402, the bottom end of the screen disc 4031 is connected with the upper end of the lifting rod 4032, the bottom end of the lifting rod 4032 is connected with the upper end of the chassis 4033, the bottom end of the molding press 4 is connected with the upper end of a molding press support 404, and the molding press support 404 is provided with a plurality of groups.
Example 1
The implementation method of the cold treatment device of the neodymium iron boron magnet comprises the following steps:
firstly, putting a neodymium iron boron magnet with untreated magnetic flux of 3860G into a melt-spinning furnace 1, starting an evacuation pump 103, evacuating oxygen in an inner cavity 101 of the melt-spinning furnace through an evacuation pipe 104, continuously heating the neodymium iron boron magnet in the inner cavity 101 of the melt-spinning furnace by a preheating layer 102, and conveying the neodymium iron boron magnet into a stirring furnace 2 through a first conveying pipe 5 after heating;
secondly, after the mixture is sent to the stirring furnace 2, the stirring device 203 is started, the stirring blades 207 stir the neodymium-iron-boron magnet through the stirring shaft 206, the stirring time is 1.5h, meanwhile, the cooling layer 202 can continuously cool the neodymium-iron-boron magnet, and after the stirring is completed, the neodymium-iron-boron magnet is transported to the soaking furnace 3 through the second transport pipe 6;
thirdly, after the untreated neodymium-iron-boron magnet with the magnetic flux of 3860G enters the soaking furnace 3, nitrogen spraying and soaking are carried out on the neodymium-iron-boron magnet with the untreated magnetic flux of 3860G through a nitrogen spraying device 303, the soaking time can be set through a controller, the set time period is 30min, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into the profiling furnace 4 through a third conveying pipe 7;
fourth, send the neodymium iron boron magnet that soaks to the profiling stove 4 back earlier through powder process unit 402 to the grinding of neodymium iron boron magnet, fall into on sieve tray 4031 from leaking powder hole 4023 after grinding, rethread sieve tray 4031 falls into chassis 4033 upper end, go up and down chassis 4033 through lifter 4032 to carry out the die mould to the neodymium iron boron magnet that pulverizes on chassis 4033 upper end, the die mould duration is 20min, and die mould intensity is 585mpa, and the magnetic flux after the neodymium iron boron magnet treatment is 4010G at last.
Example two
The implementation method of the cold treatment device of the neodymium iron boron magnet comprises the following steps:
firstly, putting a neodymium iron boron magnet with untreated magnetic flux of 3950G into a melt-spinning furnace 1, starting an evacuation pump 103, evacuating oxygen in an inner cavity 101 of the melt-spinning furnace through an evacuation pipe 104, continuously heating the neodymium iron boron magnet in the inner cavity 101 of the melt-spinning furnace by a preheating layer 102, and conveying the neodymium iron boron magnet into a stirring furnace 2 through a first conveying pipe 5 after heating;
secondly, after the mixture is sent to the stirring furnace 2, the stirring device 203 is started, the stirring blades 207 stir the neodymium-iron-boron magnet through the stirring shaft 206, the stirring time is 1.5h, meanwhile, the cooling layer 202 can continuously cool the neodymium-iron-boron magnet, and after the stirring is completed, the neodymium-iron-boron magnet is transported to the soaking furnace 3 through the second transport pipe 6;
thirdly, after the untreated neodymium-iron-boron magnet with the magnetic flux of 3950G enters the soaking furnace 3, nitrogen spraying and soaking are carried out on the neodymium-iron-boron magnet with the untreated magnetic flux of 3950G through a nitrogen spraying device 303, the soaking time can be set through a controller, the set time period is 40min, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into the profiling furnace 4 through a third conveying pipe 7;
fourth, send the neodymium iron boron magnet that soaks to the profiling stove 4 back earlier through powder process device 402 to the grinding of neodymium iron boron magnet, fall into on sieve tray 4031 from leaking powder hole 4023 after grinding, rethread sieve tray 4031 falls into chassis 4033 upper end, go up and down chassis 4033 through lifter 4032 to carry out the die mould to the neodymium iron boron magnet that pulverizes on chassis 4033 upper end, the die mould duration is 30min, and the die mould intensity is 612mpa, and the magnetic flux after the neodymium iron boron magnet treatment is 4010G finally.
Example III
The implementation method of the cold treatment device of the neodymium iron boron magnet comprises the following steps:
firstly, putting a neodymium iron boron magnet with untreated magnetic flux of 4180G into a melt-spinning furnace 1, starting an evacuation pump 103, evacuating oxygen in an inner cavity 101 of the melt-spinning furnace through an evacuation pipe 104, continuously heating the neodymium iron boron magnet in the inner cavity 101 of the melt-spinning furnace by a preheating layer 102, and conveying the neodymium iron boron magnet into a stirring furnace 2 through a first conveying pipe 5 after heating;
secondly, after the mixture is sent to the stirring furnace 2, the stirring device 203 is started, the stirring blades 207 stir the neodymium-iron-boron magnet through the stirring shaft 206, the stirring time is 1.5h, meanwhile, the cooling layer 202 can continuously cool the neodymium-iron-boron magnet, and after the stirring is completed, the neodymium-iron-boron magnet is transported to the soaking furnace 3 through the second transport pipe 6;
thirdly, after the untreated neodymium-iron-boron magnet with the magnetic flux of 4180G enters the soaking furnace 3, nitrogen spraying and soaking are carried out on the neodymium-iron-boron magnet with the untreated magnetic flux of 4180G through a nitrogen spraying device 303, the soaking time can be set through a controller, the set time period is 55min, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into the profiling furnace 4 through a third conveying pipe 7;
fourth, send the neodymium iron boron magnet that soaks to the profiling stove 4 back earlier through powder process device 402 to the grinding of neodymium iron boron magnet, fall into on sieve tray 4031 from leaking powder hole 4023 after grinding, rethread sieve tray 4031 falls into chassis 4033 upper end, go up and down chassis 4033 through lifter 4032 to carry out the profiling to the neodymium iron boron magnet of the grinding of chassis 4033 upper end, the profiling is long for 35min, and the profiling intensity is 632mpa, and the magnetic flux after the neodymium iron boron magnet treatment is 4240G at last.
Example IV
The implementation method of the cold treatment device of the neodymium iron boron magnet comprises the following steps:
firstly, putting a neodymium iron boron magnet with untreated magnetic flux of 4270G into a melt-spinning furnace 1, starting an evacuation pump 103, evacuating oxygen in an inner cavity 101 of the melt-spinning furnace through an evacuation pipe 104, continuously heating the neodymium iron boron magnet in the inner cavity 101 of the melt-spinning furnace by a preheating layer 102, and conveying the neodymium iron boron magnet into a stirring furnace 2 through a first conveying pipe 5 after heating;
secondly, after the mixture is sent to the stirring furnace 2, the stirring device 203 is started, the stirring blades 207 stir the neodymium-iron-boron magnet through the stirring shaft 206, the stirring time is 1.5h, meanwhile, the cooling layer 202 can continuously cool the neodymium-iron-boron magnet, and after the stirring is completed, the neodymium-iron-boron magnet is transported to the soaking furnace 3 through the second transport pipe 6;
thirdly, after the neodymium-iron-boron magnet with the untreated magnetic flux of 4270G enters the soaking furnace 3, nitrogen spraying and soaking are carried out on the neodymium-iron-boron magnet with the untreated magnetic flux of 4270G through a nitrogen spraying device 303, the soaking time can be set through a controller, the set time period is 75 minutes, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into the profiling furnace 4 through a third conveying pipe 7;
fourth, send the neodymium iron boron magnet that soaks to the profiling stove 4 back earlier through powder process device 402 to the grinding of neodymium iron boron magnet, fall into on sieve tray 4031 from leaking powder hole 4023 after grinding, rethread sieve tray 4031 falls into chassis 4033 upper end, go up and down chassis 4033 through lifter 4032 to carry out the profiling to the neodymium iron boron magnet of the grinding of chassis 4033 upper end, the profiling is long for 45min, and the profiling intensity is 685mpa, and the magnetic flux after the neodymium iron boron magnet treatment is 4392G at last.
Example five
The implementation method of the cold treatment device of the neodymium iron boron magnet comprises the following steps:
firstly, putting a neodymium iron boron magnet with untreated magnetic flux of 4530G into a melt-spinning furnace 1, starting an evacuation pump 103, evacuating oxygen in an inner cavity 101 of the melt-spinning furnace through an evacuation pipe 104, continuously heating the neodymium iron boron magnet in the inner cavity 101 of the melt-spinning furnace by a preheating layer 102, and conveying the neodymium iron boron magnet into a stirring furnace 2 through a first conveying pipe 5 after heating;
secondly, after the mixture is sent to the stirring furnace 2, the stirring device 203 is started, the stirring blades 207 stir the neodymium-iron-boron magnet through the stirring shaft 206, the stirring time is 1.5h, meanwhile, the cooling layer 202 can continuously cool the neodymium-iron-boron magnet, and after the stirring is completed, the neodymium-iron-boron magnet is transported to the soaking furnace 3 through the second transport pipe 6;
thirdly, after the untreated neodymium-iron-boron magnet with the magnetic flux of 4530G enters the soaking furnace 3, nitrogen spraying and soaking are carried out on the neodymium-iron-boron magnet with the untreated magnetic flux of 4530G through a nitrogen spraying device 303, the soaking time can be set through a controller, the set time is 95min, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into the profiling furnace 4 through a third conveying pipe 7;
fourth, send the neodymium iron boron magnet that soaks to the profiling stove 4 back earlier through powder process device 402 to the grinding of neodymium iron boron magnet, fall into on sieve tray 4031 from leaking powder hole 4023 after grinding, rethread sieve tray 4031 falls into chassis 4033 upper end, go up and down chassis 4033 through lifter 4032 to carry out the die mould to the neodymium iron boron magnet that pulverizes on chassis 4033 upper end, the die mould is long for 50min, and the die mould intensity is 720mpa, and the magnetic flux after the neodymium iron boron magnet treatment is 4728G finally.
To sum up, according to the cold treatment device and the processing method thereof for the neodymium-iron-boron magnet, the nitrogen spraying device 303 in the soaking furnace 3 can perform cold treatment on the neodymium-iron-boron magnet in liquid nitrogen, the crystal grains and the crystal boundary phases on the surface layer of the neodymium-iron-boron magnet are not damaged, the magnetic performance of the neodymium-iron-boron magnet can be protected, and further the neodymium-iron-boron magnet can be induced to have fine structural changes and stress redistributed on the premise of not damaging the neodymium-iron-boron magnet, so that the performance of the material is improved. The profiling furnace 4 can increase magnetism of the neodymium-iron-boron magnet, so that the neodymium-iron-boron magnet has wide hysteresis loop, high coercivity and high remanence. The outer ends of the soaking furnace 3 and the profiling furnace 4 are respectively provided with a controller, so that the soaking time length in the soaking furnace 3 and the time length of the powder making device 402 and the profiling machine 403 can be controlled, neodymium-iron-boron magnets with different magnetic fluxes are required to be soaked in different time lengths, profiling time lengths and pressure value intensities, and the device is suitable for carrying out cold treatment processing on neodymium-iron-boron magnets with various models.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a cold treatment device of neodymium iron boron magnetism body, includes melt-spun stove (1), stirring stove (2), soaking furnace (3), profiling stove (4), first transportation pipe (5), second transportation pipe (6), third transportation pipe (7), first pressure pump (8), second pressure pump (9) and third pressure pump (10), its characterized in that: the utility model discloses a nitrogen spraying device, which is characterized in that a melt-spinning furnace (1) is connected with a stirring furnace (2) through a first conveying pipe (5), a first pressure pump (8) is installed on the first conveying pipe (5), the stirring furnace (2) is connected with a soaking furnace (3) through a second conveying pipe (6), a second pressure pump (9) is installed on the second conveying pipe (6), the soaking furnace (3) is connected with a profiling furnace (4) through a third conveying pipe (7), a third pressure pump (10) is installed on the third conveying pipe (7), the melt-spinning furnace (1) comprises a melt-spinning furnace inner cavity (101), a preheating layer (102), an evacuating pump (103), an evacuating pipe (104) and a melt-spinning furnace base (105), the melt-spinning furnace inner cavity (101) is arranged in the melt-spinning furnace (1), one side of the melt-spinning furnace (1) is provided with the evacuating pump (103), the stirring furnace (2) comprises a stirring furnace inner cavity (201), a cooling layer (202), a stirring device (203), a stirring furnace base (204), a stirring motor (205), a stirring shaft (206) and a stirring blade (207), the stirring motor (2) are connected with the profiling furnace (4), the stirring furnace inner cavity (201), the soaking furnace inner cavity (201), the nitrogen spraying device (301) and the nitrogen spraying device (302), the soaking furnace is characterized in that a soaking furnace inner cavity (302) is formed in the soaking furnace (3), a nitrogen spraying device (303) is arranged in the soaking furnace inner cavity (302), the compression furnace (4) comprises a compression furnace inner cavity (401), a powder making device (402), a compression molding machine (403) and a compression furnace supporting frame (404), the compression furnace inner cavity (401) is formed in the compression furnace (4), and the powder making device (402) and the compression molding machine (403) are arranged in the compression furnace inner cavity (401).
2. A cold treatment device for a neodymium-iron-boron magnet according to claim 1, wherein: one end of a first conveying pipe (5) is connected with one side of the melt-spun furnace (1), the other end of the first conveying pipe (5) is connected with one side of the stirring furnace (2), the middle end of the first conveying pipe (5) is provided with a first pressure pump (8), one end of a second conveying pipe (6) is connected with one side of the stirring furnace (2), the other end of the second conveying pipe (6) is connected with one side of the soaking furnace (3), the middle end of the second conveying pipe (6) is provided with a second pressure pump (9), one end of a third conveying pipe (7) is connected with one side of the soaking furnace (3), the other end of the third conveying pipe (7) is connected with one side of the profiling furnace (4), and the middle end of the third conveying pipe (7) is provided with a third pressure pump (10).
3. A cold treatment device for a neodymium-iron-boron magnet according to claim 2, wherein: the utility model discloses a continuous casting furnace, including melt-spun stove, vacuum pump, conveyer pipe, vacuum pump, conveyer pipe, preheating layer (102) are provided with between melt-spun stove inner chamber (101) and melt-spun stove (1) that are offered inside melt-spun stove (1), melt-spun stove one side outer wall upper end links to each other with evacuating pipe (104) one end to evacuating pipe (104) one end extends to in melt-spun stove inner chamber (101), evacuating pipe (104) are last to be provided with evacuating pump (103), melt-spun stove (1) opposite side outer wall bottom links to each other with first conveyer pipe (5) one end to in first conveyer pipe (5) one end extends to melt-spun stove inner chamber (101), melt-spun stove (1) bottom links to each other with melt-spun stove bottom seat (105) upper end.
4. A cold treatment device for a neodymium-iron-boron magnet according to claim 3, wherein: stirring stove inner chamber (201) and stirring stove (2) that stirring stove (2) inside were offered are provided with cooling layer (202) between, install agitating unit (203) in stirring stove inner chamber (201), stirring motor (205) are installed on stirring stove (2) top, stirring motor (205) bottom links to each other with (mixing) shaft (206) upper end, (mixing) shaft (206) outer wall is provided with a plurality of stirring vane (207), stirring stove (2) bottom links to each other with stirring stove base (204) upper end, stirring stove (2) one side outer wall bottom links to each other with first transportation pipe (5) one end, and in first transportation pipe (5) extend to stirring stove inner chamber (201), stirring stove (2) opposite side outer wall bottom links to each other with second transportation pipe (6) one end, and second transportation pipe (6) extend to in second transportation pipe (6).
5. The apparatus for cold treatment of a neodymium-iron-boron magnet according to claim 4, wherein: install nitrogen spraying device (303) in soaking stove inner chamber (302), nitrogen spraying device (303) outer wall is provided with multiunit nitrogen spraying pipe (305), has seted up a plurality of holes on nitrogen spraying pipe (305), and soaking stove (3) bottom links to each other with soaking stove support frame (304) upper end, and soaking stove support frame (304) are provided with multiunit, and soaking stove (3) bottom links to each other with third transportation pipe (7) one end to in third transportation pipe (7) extend to soaking stove inner chamber (302).
6. The apparatus for cold treatment of a neodymium-iron-boron magnet according to claim 5, wherein: the utility model discloses a powder grinding device, including compression mould stove inner chamber (401), compression mould stove inner chamber (401) upper end is provided with powder making device (402), powder making device (402) are including powder making tray (4021), roller (4022), leak powder hole (4023) and fixed column (4024), powder making tray (4021) are installed in compression mould stove inner chamber (401) upper end, multiunit roller (4022) are installed on powder making tray (4021) top, a plurality of leak powder holes (4023) have been seted up to powder making tray (4021) upper end, powder making tray (4021) bottom links to each other with fixed column (4024) upper end.
7. The apparatus for cold treatment of a neodymium-iron-boron magnet according to claim 6, wherein: profiling machine (403) are arranged below profiling furnace inner chamber (401), profiling machine (403) are including sieve tray (4031), lifter (4032) and chassis (4033), sieve tray (4031) upper end links to each other with powder making device (402) bottom, sieve tray (4031) bottom links to each other with lifter (4032) upper end, lifter (4032) bottom links to each other with chassis (4033) upper end, profiling furnace (4) bottom links to each other with profiling furnace support frame (404) upper end to profiling furnace support frame (404) are provided with the multiunit.
8. The apparatus for cold treatment of a neodymium-iron-boron magnet according to claim 7, wherein: the outer end of the soaking furnace (3) is provided with a controller of the soaking furnace (3), and the soaking duration in the soaking furnace (3) can be set through the controller arranged outside the soaking furnace (3).
9. The apparatus for cold treatment of a neodymium-iron-boron magnet according to claim 8, wherein: the outer end of the molding furnace (4) is provided with a molding furnace (4) controller, and the duration of the powder making device (402) and the molding press (403) can be respectively set through the controller arranged outside the molding furnace (4).
10. A method of implementing a cold treatment apparatus for a neodymium-iron-boron magnet according to claim 9, comprising the steps of:
s1: putting a neodymium iron boron magnet into a melt-spinning furnace (1), starting an evacuating pump (103), evacuating oxygen in an inner cavity (101) of the melt-spinning furnace through an evacuating pipe (104), continuously heating the neodymium iron boron magnet in the inner cavity (101) of the melt-spinning furnace by a preheating layer (102), and conveying the neodymium iron boron magnet into a stirring furnace (2) through a first conveying pipe (5) after heating;
s2: after the powder is sent to a stirring furnace (2), a stirring device (203) is started, stirring blades (207) stir the neodymium-iron-boron magnet through a stirring shaft (206), meanwhile, a cooling layer (202) can continuously cool the neodymium-iron-boron magnet, and after stirring, the neodymium-iron-boron magnet is transported to a soaking furnace (3) through a second transport pipe (6);
s3: after entering a soaking furnace (3), the neodymium-iron-boron magnet is subjected to nitrogen spraying soaking through a nitrogen spraying device (303), the soaking time can be set through a controller, and after soaking, the soaked neodymium-iron-boron magnet is conveyed into a profiling furnace (4) through a third conveying pipe (7);
s4: the neodymium iron boron magnet is conveyed to the profiling furnace (4), then is crushed through the powder making device (402), falls onto the sieve tray (4031) from the powder leakage hole (4023) after being crushed, falls onto the upper end of the chassis (4033) through the sieve tray (4031), and lifts the chassis (4033) through the lifting rod (4032), and profiling is carried out on the neodymium iron boron magnet crushed at the upper end of the chassis (4033).
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