CN2567535Y - Neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace - Google Patents
Neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace Download PDFInfo
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- CN2567535Y CN2567535Y CN 02269247 CN02269247U CN2567535Y CN 2567535 Y CN2567535 Y CN 2567535Y CN 02269247 CN02269247 CN 02269247 CN 02269247 U CN02269247 U CN 02269247U CN 2567535 Y CN2567535 Y CN 2567535Y
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Abstract
The utility model relates to a vacuum heat treatment appliance, more specifically a neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace. The utility model comprises a furnace shell, a furnace pipe inside the furnace shell, a heating body between the furnace shell and the furnace pipe and a heat-insulating layer. The furnace shell is provided with a vacuumizing pipe mouth, and the heat-insulating layer has space with the inner surface of the furnace shell. The lower part of the fritting furnace is provided with a gas quenching chamber connected with the fritting furnace via a vacuum gate valve, and a feeding and discharging sealed barn is connected with the gas quenching chamber via the vacuum gate valve. The fritting furnace adopts the technical means of vacuumizing the exterior space of the furnace pipe. Compared with the traditional external heating type fritting furnace, the fritting temperature raises substantially and can attain 1200 DEG C. Compared with the internal heating type fritting furnace, the problem that the heat-insulating layer is polluted by oil vapor no longer exists. The utility model is suitable for the magnet process technology not only in dry spinning method but also in wet spinning method, and can be charged with inert gases. The neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace is provided with three chambers and barns which are a fritting chamber, the gas quenching chamber and the feeding and discharging sealed barn, and has the advantages of high work efficiency, convenient operation and reliability.
Description
Technical field
The utility model relates to vacuum heat treatment equipment, is specially Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace.
Background technology
Vacuum sintering furnace can be divided into external-heat and internal heat type by structure and mode of heating.The external-heat vacuum sintering furnace is subjected to structural limitations, and the temperature in its flue generally can only reach about 800 degree, can't reach the sintering temperature of Nd-Fe-Bo permanent magnet material, vacuumizes in the flue, and when temperature was too high, Strength of Metallic Materials descended, and causes the flue compressive deformation.At present, domestic neodymium iron boron magnetic body sintering, mostly adopt the internal heat type vacuum sintering furnace, but the internal heat type vacuum sintering furnace can only be used for dry method neodymium iron boron magnetic body processing technology, because the blank to be sintered that wet processing processes contains a large amount of oily media, the gasification of being heated of the oily medium in sintering process in the blank, is attached in the heat-insulation layer of internal heat type sintering furnace at the oil vapour absorption after the gasification, to polluting and destroy vavuum pump in the sintering furnace, shortened the service life of sintering furnace greatly.Though the wet method processing technology of magnet has plurality of advantages, because sintering furnace, the domestic dry process technology that mostly adopts at present.Though the sintering furnace that is applicable to wet processing is abroad arranged, complex structure, price are high.Based on same reason, the internal heat type vacuum sintering furnace can not be protected by applying argon gas, and simple vacuum-sintering can't reduce sintering efficient by the method heat conduction of gaseous exchange and conduction.
Summary of the invention
The utility model is exactly the problems referred to above that solve the sintering furnace existence of present neodymium iron boron magnetic body process employing, and a kind of Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace of new structure is provided.
The utility model is to adopt following technical scheme to realize: Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace, comprise and have flue, the calandria between furnace shell and flue and the heat-insulation layer that vacuumizes the mouth of pipe and charging and discharging bell in furnace shell, the furnace shell, be provided with on furnace shell and vacuumize the mouth of pipe, heat-insulation layer and furnace shell inner surface keep the gap.Existing external-heat vacuum sintering furnace so the temperature in its flue can not be too high, is because after vacuumizing in the flue, the big pressure differential of the inside and outside formation of flue, if the flue temperature is too high, flue very easily produces distortion under the effect of high temperature, inside and outside differential pressure.The utility model vacuumizes the mouth of pipe by setting up on furnace shell, make the also vacuum-pumping of space between furnace shell and flue, can effectively reduce the inside and outside pressure differential of flue like this, and then can improve the temperature in the sintering furnace.Heat-insulation layer and furnace shell inner surface keep the gap, are to vacuumize required space environment in order to form, and satisfy the spatial design requirement that vacuumizes.If heat-insulation layer is close to the furnace shell inner surface, want the flue space outerpace is vacuumized, need open on the heat-insulation layer with furnace shell on vacuumize the hole that the mouth of pipe communicates, destroy the heat-insulating property of sintering furnace so first, second only vacuumize in the hole and also do not meet the spatial design requirement that vacuumizes.Need the magnet blank of sintering to send into flue from bell, in the calandria heating, vacuumize simultaneously flue is inside and outside, less relatively pressure differential is arranged inside and outside making flue, after sintering finished, stove to be sintered and magnet were cooled to room temperature and can come out of the stove.
The sintering furnace of single chamber is owing to stove body temperature inertia, and its cooling needs long time, influences the production efficiency of sintering furnace.The utility model is provided with to link and have the cooling inert gas through easamatic power brake plate valve and sintering furnace below sintering furnace imports the gas of the mouth of pipe chamber of quenching, the quench bottom of chamber of gas is provided with end and the fixing multi-stage oil cylinder of bell, by the ascending, descending of oil cylinder, finish the magnet blank in quench the switching between the chamber of flue and gas.The magnet blank enters the gas chamber of quenching, and can cool off fast under the effect of cooling inert gas, avoids sintering furnace to repeat heating, cooling, improves the use operating efficiency of sintering furnace.
Link and be provided with the input and output material gas-tight silo that has charging aperture, vacuumizes the mouth of pipe through easamatic power brake plate valve and the gas chamber of quenching.Put into the magnet blank that needs sintering from the charging aperture of input and output material gas-tight silo, the input and output material gas-tight silo is vacuumized, open quench slide valve between the chamber of itself and gas then, blank is sent into the gas chamber of quenching, like this, can avoid to gas quench indoor vacuum or inert gas environment repeat destroy.
On sintering furnace, also be provided with respectively with flue in, the inert gas input mouth of pipe that communicates with space between the furnace shell of flue, vacuumize reach requirement after, import inert gas by this input mouth of pipe to the flue interior or exterior space, to increase the conduction pattern of heat, improve the sintering temperature in the sintering furnace.
Multifunctional vacuum sintering furnace described in the utility model, by the technological means that the flue space outerpace is vacuumized, and adopt novel exotic material, it is compared with traditional external-heat sintering furnace, sintering temperature increases substantially, can reach 1200 ℃, make it be applicable to the sintering of neodymium iron boron magnetic body.Compare with existing internal heat type sintering furnace, do not existed heat-insulation layer, can effectively solve the de-oiling problem of magnet blank, thereby this sintering furnace not only is applicable to dry method but also is applicable to the magnet processing technology of wet method by the oil vapour pollution problems.But another outstanding feature of comparing with existing vacuum sintering furnace is a filling with inert gas, has not only strengthened having improved the sintering environment, and having improved sintering temperature being sintered the protection of magnet.This sintering furnace has that sintering, gas are quenched, three bins of input and output material, and whole device high efficiency is easy to use, reliable.
Description of drawings
Fig. 1 is a concrete structure schematic diagram of the present utility model;
The specific embodiment
Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace, comprise and have flue 3, the calandria between furnace shell and flue 4 and the heat-insulation layer 5 that vacuumizes the mouth of pipe and charging and discharging bell 2 in furnace shell 1, the furnace shell, on furnace shell, be provided with and vacuumize the mouth of pipe 6, heat-insulation layer 5 keeps the gap with furnace shell 1 inner surface, the mouth of pipe that vacuumizes of flue is divided into the low vacuum mouth of pipe 20 and the high vacuum mouth of pipe 21, also is provided with thermometric galvanic couple 22 in flue.Below sintering furnace, be provided with through easamatic power brake plate valve 7 and sintering furnace and link and the gas that has a cooling inert gas input mouth of pipe 8 chamber 9 of quenching, the quench bottom of chamber of gas is provided with the fixing multi-stage oil cylinder 10 of end and bell 2, at gas indoor fan 11 and the heat exchanger 12 of also being provided with of quenching; Link and be provided with the input and output material gas-tight silo 16 that has charging aperture 14, vacuumizes the mouth of pipe 15 through easamatic power brake plate valve 13 and the gas chamber of quenching.The input and output material gas-tight silo is provided with gloves hole and observation window.On sintering furnace, also be provided with respectively with flue in, the inert gas input mouth of pipe 23,24 that communicates with space between the furnace shell of flue, grate 17 is set on bell 2, be used to support the magnet blank that is sintered, neck is provided with thermal boundary 19 in the gas outlet on flue top, and the magnet blank can be piled up in charging basket 18.All be provided with valve on each mouth of pipe of this sintering furnace, be used to control the switching of the corresponding mouth of pipe.
When device uses, open easamatic power brake plate valve 7, flue, the gas chamber of quenching is vacuumized by vacuumizing unit through the high vacuum mouth of pipe 21, then applying argon gas.Magnet blank to be sintered is put into gas-tight silo by the charging aperture of gas-tight silo, vacuumize through vacuumizing 15 pairs of gas-tight silos of the mouth of pipe then, charge into argon gas again, then, by the manual packing of opening blank in gloves hole, and blank piled up in charging basket, open easamatic power brake plate valve 13, the charging basket that connecting gear in the gas-tight silo will be equipped with blank is delivered on the grate 17 on the bell, the control multi-stage oil cylinder rises, and charging basket is headed into flue and make bell and the flue sealing under the effect of oil cylinder working-pressure, and the calandria energising is heated, blank to wet processing processing, through the low vacuum mouth of pipe 20, through a cold-trap flue is vacuumized earlier, the oil vapour that blank produces is extracted out by the low vacuum unit, cold-trap makes oil vapour liquefaction, plays the effect of protection vacuum unit; After a period of time,, flue is vacuumized, when flue vacuumizes, vacuumize through the space that vacuumizes between 6 pairs of flues of the mouth of pipe and furnace shell on the furnace shell by the high vacuum unit again through the high vacuum mouth of pipe 21.Treat the vacuum that reaches required in the flue, by the inert gas input mouth of pipe 23,24 respectively to flue interior or exterior space input inert gas.After finishing sintering, the control multi-stage oil cylinder descends, and makes charging basket reduce to the gas chamber of quenching, and close quench easamatic power brake plate valve 7 between the chamber of flue and gas, by the mouth of pipe 8 to the gas chamber input cooling inert gas of quenching, in the acting in conjunction of fan, heat exchanger, finished product behind the sintering is cooled off fast, take out through gas-tight silo.
Claims (5)
1, a kind of Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace, comprise and have flue (3), the calandria between furnace shell and flue (4) and the heat-insulation layer (5) that vacuumizes the mouth of pipe and charging and discharging bell (2) in furnace shell (1), the furnace shell, it is characterized by: be provided with on furnace shell and vacuumize the mouth of pipe (6), heat-insulation layer (5) keeps the gap with furnace shell (1) inner surface.
2, Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace as claimed in claim 1, it is characterized by: be provided with below sintering furnace through easamatic power brake plate valve (7) and sintering furnace and link and the gas that has a cooling inert gas input mouth of pipe (8) chamber (9) of quenching, the quench bottom of chamber of gas is provided with the multi-stage oil cylinder (10) that end and bell (2) are fixed.
3, as claim 1,2 described Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnaces, it is characterized by: link and be provided with the input and output material gas-tight silo (16) that has charging aperture (14), vacuumizes the mouth of pipe (15) through easamatic power brake plate valve (13) and the gas chamber of quenching.
4, as claim 1,2 described Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnaces, it is characterized by: on sintering furnace, also be provided with respectively with flue in, flue the inert gas input mouth of pipe (23), (24) that communicate with space between the furnace shell.
5, Nd-Fe-Bo permanent magnet material multifunctional vacuum sintering furnace as claimed in claim 3 is characterized by: on sintering furnace, also be provided with respectively with flue in, flue the inert gas input mouth of pipe (23), (24) that communicate with space between the furnace shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02269247 CN2567535Y (en) | 2002-09-02 | 2002-09-02 | Neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02269247 CN2567535Y (en) | 2002-09-02 | 2002-09-02 | Neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace |
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| Publication Number | Publication Date |
|---|---|
| CN2567535Y true CN2567535Y (en) | 2003-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02269247 Expired - Fee Related CN2567535Y (en) | 2002-09-02 | 2002-09-02 | Neodymium-iron-boron permanent-magnet material multifunction vacuum fritting furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767948A (en) * | 2012-08-13 | 2012-11-07 | 西安四方超轻材料有限公司 | Split magnesium-lithium alloy vacuum smelting furnace |
| CN106643131A (en) * | 2016-10-20 | 2017-05-10 | 北京华海中谊节能科技股份有限公司 | Movable type vertical vacuum furnace structure |
| CN106802078A (en) * | 2017-01-03 | 2017-06-06 | 新冶高科技集团有限公司 | A kind of neodymium iron boron high vacuum pressure sintering furnace |
| CN108922769A (en) * | 2018-07-20 | 2018-11-30 | 芜湖新瑟安智能科技有限公司 | Attemperator after a kind of sintering of neodymium iron boron magnetic pole |
| CN111647724A (en) * | 2020-05-28 | 2020-09-11 | 合肥科晶材料技术有限公司 | Vertical high-temperature sintering gas quenching furnace |
-
2002
- 2002-09-02 CN CN 02269247 patent/CN2567535Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767948A (en) * | 2012-08-13 | 2012-11-07 | 西安四方超轻材料有限公司 | Split magnesium-lithium alloy vacuum smelting furnace |
| CN106643131A (en) * | 2016-10-20 | 2017-05-10 | 北京华海中谊节能科技股份有限公司 | Movable type vertical vacuum furnace structure |
| CN106802078A (en) * | 2017-01-03 | 2017-06-06 | 新冶高科技集团有限公司 | A kind of neodymium iron boron high vacuum pressure sintering furnace |
| CN108922769A (en) * | 2018-07-20 | 2018-11-30 | 芜湖新瑟安智能科技有限公司 | Attemperator after a kind of sintering of neodymium iron boron magnetic pole |
| CN108922769B (en) * | 2018-07-20 | 2020-07-28 | 赣州嘉通新材料有限公司 | Heat preservation device after sintering of neodymium iron boron magnetism post |
| CN111647724A (en) * | 2020-05-28 | 2020-09-11 | 合肥科晶材料技术有限公司 | Vertical high-temperature sintering gas quenching furnace |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |