WO2021062649A1 - 一种高效率钕铁硼磁体烧结装置 - Google Patents

一种高效率钕铁硼磁体烧结装置 Download PDF

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WO2021062649A1
WO2021062649A1 PCT/CN2019/109495 CN2019109495W WO2021062649A1 WO 2021062649 A1 WO2021062649 A1 WO 2021062649A1 CN 2019109495 W CN2019109495 W CN 2019109495W WO 2021062649 A1 WO2021062649 A1 WO 2021062649A1
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fixedly connected
wall
furnace
sintering
sintering furnace
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PCT/CN2019/109495
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English (en)
French (fr)
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朱明�
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江西荧光磁业有限公司
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Priority to PCT/CN2019/109495 priority Critical patent/WO2021062649A1/zh
Publication of WO2021062649A1 publication Critical patent/WO2021062649A1/zh

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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
    • 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
    • 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
    • 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
    • B22F3/10—Sintering only
    • 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
    • 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
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding

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  • the invention relates to the technical field of sintering furnace equipment, in particular to a high-efficiency neodymium iron boron magnet sintering device.
  • NdFeB magnet is a kind of permanent magnet material with the highest performance. Because of its excellent magnetic properties, NdFeB magnets are widely used in various fields. In recent years, various countries have been studying magnetic metals. NdFeB magnets are Invented by contemporary Japanese scientists, China is also constantly conducting research.
  • NdFeB magnets With the large-scale use of NdFeB magnets, more and more NdFeB magnets are needed. Many scientists are contributing to the production of permanent magnets. However, during the high-temperature sintering process, NdFeB magnets will always be sintered. The vacuum in the furnace is not high or the temperature of the sintering furnace rises too slowly, which results in a low sintering rate of the NdFeB magnet.
  • the purpose of the present invention is to provide a high-efficiency NdFeB magnet sintering device to solve the problem of the high-temperature sintering process of the NdFeB magnet proposed in the background art.
  • the vacuum in the sintering furnace is always low or the sintering furnace is not high.
  • the temperature rises too slowly, which leads to the problem of low sintering rate of NdFeB magnets.
  • a high-efficiency neodymium iron boron magnet sintering device comprising an inner wall of a sintering furnace, the outer side of the inner wall of the sintering furnace is fixedly connected with a cooling layer, and the outer side of the cooling layer is fixedly connected with Insulating layer
  • an induction coil is fixedly connected to the inner side of the inner wall of the sintering furnace
  • a fixed shaft is fixedly connected to the inner side of the inner wall of the sintering furnace
  • a bracket is movably connected to the outer side of the fixed shaft
  • a clamp is fixedly connected to the outer side of the bracket
  • a plug is fixedly connected to the rear side of the induction coil
  • a pressure gauge is fixedly connected to the left side of the inner wall of the sintering furnace
  • a thermometer is fixedly connected to the left side of the inner wall of the sintering furnace
  • the right side of the inner wall of the sintering furnace is
  • the induction coil is a spiral coil, and the induction coil and the plug are electrically connected.
  • the fixed shaft is provided with a protruding sliding block, a sliding groove is arranged inside the bracket, and the sliding block is adapted to the sliding groove.
  • brackets and clamps are equidistantly distributed in five groups on the fixed axis, and each group of brackets has four clamps.
  • the material of the clamp is a metal material.
  • the base is distributed on the four corners of the lower part of the thermal insulation layer, and the bottom of the base is provided with a circular groove.
  • the beneficial effect of the present invention is that the high-efficiency neodymium iron boron magnet sintering device adopts induction heating to transmit the alternating current generated by the power supply to the induction coil, and the alternating current on the induction coil is The alternating magnetic field is generated on the metal fixture, so that the eddy current is generated inside the metal fixture, and the heating function is realized, and the thermal efficiency is increased to more than 95%. It is more efficient and energy-saving, much higher than the traditional heating method.
  • the device is equipped with a press. The pressure in the furnace can be effectively seen to determine whether the furnace is in a vacuum state, and the problem of low sintering efficiency of neodymium iron boron magnets caused by the incomplete vacuum environment in the furnace can be avoided.
  • Figure 1 is a schematic diagram of the overall structure of the present invention.
  • FIG. 2 is a schematic diagram of the front cross-sectional structure of the present invention.
  • Figure 3 is a schematic side view of the cross-sectional structure of the present invention.
  • a high-efficiency NdFeB magnet sintering device including a sintering furnace inner wall 1, the outer side of the sintering furnace inner wall 1 is fixedly connected with a cooling layer 2, and the outer side of the cooling layer 2
  • the insulation layer 3 is fixedly connected, the inner side of the inner wall 1 of the sintering furnace is fixedly connected with the induction coil 4, the inner side of the inner wall 1 of the sintering furnace is fixedly connected with a fixed shaft 5, the outer side of the fixed shaft 5 is movably connected with a bracket 6, and the outer side of the bracket 6 is fixedly connected
  • the induction coil 4 is a helical coil, and the induction coil 4 and the plug 8 are electrically connected, which is beneficial for the induction coil 4 to uniformly generate alternating current in the furnace, and ensures that the heat on the clamp 7 is the same.
  • the fixed shaft 5 is provided with a raised slider
  • the bracket 6 is provided with a sliding groove
  • the sliding groove is matched with the sliding groove, which is beneficial for the bracket 6 to ensure the function of sliding outwards, and the bracket 6 can hold stable.
  • each set of brackets 6 and clamps 7 there are five sets of brackets 6 and clamps 7 equidistantly distributed on the fixed shaft 5, and each set of brackets 6 has four clamps 7, which helps to ensure the maximum utilization limit of the space in the furnace.
  • the material of the clamp 7 is a metal material, which is beneficial for the alternating magnetic field generated by the induction coil 4 to pass through the clamp 7 so that the clamp 7 generates eddy current.
  • the base 16 is distributed on the four corners of the lower part of the thermal insulation layer 3, and the bottom of the base 16 is provided with a circular groove, which is advantageous for fixing the device by driving screws in the circular groove.
  • the alternating current passing through the induction coil 4 generates an induction current on the fixture 7.
  • the alternating magnetic field causes the fixture 7 to generate eddy currents to generate heat to heat the neodymium iron boron magnet blanks in the fixture 7.
  • the cooling liquid can be introduced from the condensate water inlet 13 to The condensate water outlet 12 discharges the cooling liquid, and the thermometer 10 determines whether the furnace is completely cooled.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Furnace Details (AREA)

Abstract

一种高效率钕铁硼磁体烧结装置，包括烧结炉内壁（1），所述烧结炉内壁（1）的内侧固定连接有感应线圈（4），所述烧结炉内壁（1）的内侧固定连接有固定轴（5），所述固定轴（5）的外侧活动连接有支架（6），所述支架（6）的外侧固定连接有夹具（7），所述烧结炉内壁（1）的左侧固定连接有压力计（9），所述烧结炉内壁（1）的左侧固定连接有温度计（10），所述烧结炉内壁（1）的右侧固定连接有空气抽空器（11），所述绝热层（3）的右侧活动连接有炉门（14），所述炉门（14）的左侧固定连接有密封圈（15），所述绝热层（3）的下侧固定连接有底座（16）。该高效率钕铁硼磁体烧结装置，采用感应加热的方式，将热效率提高到了95％以上，更加的高效节能，避免了因炉内不完全真空环境导致的钕铁硼磁体烧结效率低下的问题。

Description

一种高效率钕铁硼磁体烧结装置 技术领域
本发明涉及烧结炉设备技术领域，具体为一种高效率钕铁硼磁体烧结装置。
背景技术
钕铁硼磁体是一种永磁材料，性能最高，因为有着优异的磁性，所以钕铁硼磁体被广泛应用在各个领域之中，近年来，各个国家都在研究磁性金属，钕铁硼磁体是日本当代科学家发明的，中国也在不断的进行研究。
随着钕铁硼磁体的大量使用，所需要的钕铁硼磁体越来越多，不少科学家都在为永磁铁的生产做贡献，但是钕铁硼磁体在高温烧结过程中，总会因为烧结炉内的真空度不高或是烧结炉的温度提升过慢，从而导致钕铁硼磁体烧结率低。
发明内容
本发明的目的在于提供一种高效率钕铁硼磁体烧结装置，以解决上述背景技术中提出钕铁硼磁体在高温烧结过程中，总会因为烧结炉内的真空度不高或是烧结炉的温度提升过慢，从而导致钕铁硼磁体烧结率低的问题。
为实现上述目的，本发明提供如下技术方案：一种高效率钕铁硼磁体烧结装置，包括烧结炉内壁，所述烧结炉内壁的外侧固定连接有冷却层，所述冷却层的外侧固定连接有绝热层，所述烧结炉内壁的内侧固定连接有感应线圈，所述烧结炉内壁的内侧固定连接有固定轴，所述固定轴的外侧活动连接有支架，所述支架的外侧固定连接有夹具，所述感应线圈的后侧固定连接有插头，所述烧结炉内壁的左侧固定连接有压力计，所述烧结炉内壁的左侧固定连接有温度计，所述烧结炉内壁的右侧固定连接有空气抽空器，所述冷却层的上侧固定连接有冷凝水出水口，所述冷却层的下侧固定连接有冷凝水进水口，所述绝热层的右侧活动连接有炉门，所述炉门的左侧固定连接有密封 圈，所述绝热层的下侧固定连接有底座。
优选的，所述感应线圈为螺旋式线圈，且感应线圈和插头为电性连接。
优选的，所述固定轴的设置有凸起滑块，支架的内部设置有滑槽，且滑块与滑槽相适配。
优选的，所述支架和夹具在固定轴上等距分布有五组，且每一组支架上都有四个夹具。
优选的，所述夹具的材质为金属材质。
优选的，所述底座分布在绝热层下部的四个角上，且底座的底部设置有圆槽。
与现有技术相比，本发明的有益效果是：该高效率钕铁硼磁体烧结装置，采用感应加热的方式，将电源产生的交变电流传到感应线圈上，感应线圈上的交变电流在金属夹具上产生交变磁场，从而使金属夹具的内部产生涡流，实现加热的功能，将热效率提高到了95％以上，更加的高效节能，远远高于传统加热方式，装置设置有压力机，可以有效看到炉内气压大小，以此判断炉内是否为真空状态，避免了因炉内不完全真空环境导致的钕铁硼磁体烧结效率低下的问题。
附图说明
图1为本发明整体结构示意图；
图2为本发明正视剖面结构示意图；
图3为本发明侧视剖面结构示意图。
图中：1、烧结炉内壁；2、冷却层；3、绝热层；4、感应线圈；5、固定轴；6、支架；7、夹具；8、插头；9、压力计；10、温度计；11、空气抽空器；12、冷凝水出水口；13、冷凝水进水口；14、炉门；15、密封圈；16、底座。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1-3，本发明提供一种技术方案：一种高效率钕铁硼磁体烧结装置，包括烧结炉内壁1，烧结炉内壁1的外侧固定连接有冷却层2，冷却层2的外侧固定连接有绝热层3，烧结炉内壁1的内侧固定连接有感应线圈4，烧结炉内壁1的内侧固定连接有固定轴5，固定轴5的外侧活动连接有支架6，支架6的外侧固定连接有夹具7，感应线圈4的后侧固定连接有插头8，烧结炉内壁1的左侧固定连接有压力计9，烧结炉内壁1的左侧固定连接有温度计10，烧结炉内壁1的右侧固定连接有空气抽空器11，冷却层2的上侧固定连接有冷凝水出水口12，冷却层2的下侧固定连接有冷凝水进水口13，绝热层3的右侧活动连接有炉门14，炉门14的左侧固定连接有密封圈15，绝热层3的下侧固定连接有底座16。
进一步的，感应线圈4为螺旋式线圈，且感应线圈4和插头8为电性连接，有利于感应线圈4能够在炉内均匀的产生交变电流，保证夹具7上的热量相同。
进一步的，固定轴5的设置有凸起滑块，支架6的内部设置有滑槽，且滑块与滑槽相适配，有利于支架6在保证向外滑动的功能时，支架6可以保持稳定。
进一步的，支架6和夹具7在固定轴5上等距分布有五组，且每一组支架6上都有四个夹具7，有利于保证炉内空间的最大利用限度。
进一步的，夹具7的材质为金属材质，有利于感应线圈4产生的交变磁场可以通过夹具7，使夹具7产生涡流。
进一步的，底座16分布在绝热层3下部的四个角上，且底座16的底部 设置有圆槽，有利于在圆槽内通过钉入螺钉从而固定装置。
工作原理：首先，将支架6从固定轴5中滑出，将钕铁硼磁体胚体放入夹具7中，将装有钕铁硼磁体胚体的夹具7和支架6从固定轴5上滑进炉内，关上炉门14，用空气抽空器11将烧结炉内壁1内的空气抽干净，根据压力计9的数值判断烧结炉内壁1内是否为真空，当烧结炉内壁1内呈现真空状态时，插上插头8，让电流通过感应线圈4，产生感应电流，因为电源为交变电流，所以感应线圈4上也为交变电流，通过感应线圈4的交变电流在夹具7上产生一个交变磁场，使夹具7产生涡流产生热量从而加热夹具7内的钕铁硼磁体胚体，当需要冷凝炉内钕铁硼磁体胚体时，可以从冷凝水进水口13通入冷却液，从冷凝水出水口12排出冷却液，通过温度计10判断炉内是否冷却完全。
最后应当说明的是，以上内容仅用以说明本发明的技术方案，而非对本发明保护范围的限制，本领域的普通技术人员对本发明的技术方案进行的简单修改或者等同替换，均不脱离本发明技术方案的实质和范围。

Claims (6)

  1. 一种高效率钕铁硼磁体烧结装置，包括烧结炉内壁(1)，其特征在于：所述烧结炉内壁(1)的外侧固定连接有冷却层(2)，所述冷却层(2)的外侧固定连接有绝热层(3)，所述烧结炉内壁(1)的内侧固定连接有感应线圈(4)，所述烧结炉内壁(1)的内侧固定连接有固定轴(5)，所述固定轴(5)的外侧活动连接有支架(6)，所述支架(6)的外侧固定连接有夹具(7)，所述感应线圈(4)的后侧固定连接有插头(8)，所述烧结炉内壁(1)的左侧固定连接有压力计(9)，所述烧结炉内壁(1)的左侧固定连接有温度计(10)，所述烧结炉内壁(1)的右侧固定连接有空气抽空器(11)，所述冷却层(2)的上侧固定连接有冷凝水出水口(12)，所述冷却层(2)的下侧固定连接有冷凝水进水口(13)，所述绝热层(3)的右侧活动连接有炉门(14)，所述炉门(14)的左侧固定连接有密封圈(15)，所述绝热层(3)的下侧固定连接有底座(16)。
  2. 根据权利要求1所述的一种高效率钕铁硼磁体烧结装置，其特征在于：所述感应线圈(4)为螺旋式线圈，且感应线圈(4)和插头(8)为电性连接。
  3. 根据权利要求1所述的一种高效率钕铁硼磁体烧结装置，其特征在于：所述固定轴(5)的设置有凸起滑块，支架(6)的内部设置有滑槽，且滑块与滑槽相适配。
  4. 根据权利要求1所述的一种高效率钕铁硼磁体烧结装置，其特征在于：所述支架(6)和夹具(7)在固定轴(5)上等距分布有五组，且每一组支架(6)上都有四个夹具(7)。
  5. 根据权利要求1所述的一种高效率钕铁硼磁体烧结装置，其特征在于：所述夹具(7)的材质为金属材质。
  6. 根据权利要求1所述的一种高效率钕铁硼磁体烧结装置，其特征在于：所述底座(16)分布在绝热层(3)下部的四个角上，且底座(16)的底部设置有圆槽。
PCT/CN2019/109495 2019-09-30 2019-09-30 一种高效率钕铁硼磁体烧结装置 WO2021062649A1 (zh)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN115301945A (zh) * 2022-08-08 2022-11-08 赣州诚正稀土新材料股份有限公司 一种高磁性烧结钕铁硼磁铁的加工设备及其使用方法
CN115338403A (zh) * 2022-07-20 2022-11-15 安徽省瀚海新材料股份有限公司 一种钕铁硼烧结炉及回火方法

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