Aging treatment device for neodymium-iron-boron magnet

Abstract

The utility model relates to a neodymium-iron-boron magnet aging treatment device which comprises a sintering furnace, a bearing seat and a bearing box, and is characterized in that the bearing box comprises a cuboid box body, a combined cover body arranged at the top of the box body, and horizontal supporting wing plates arranged on the left side wall and the right side wall of the box body; the left positioning plate and the right positioning plate are fixed to the left upper edge and the right upper edge of the box body, the detachable cover plate is supported between the left positioning plate and the right positioning plate, and the left supporting vertical plate and the right supporting vertical plate are fixed to the upper surfaces of the left positioning plate and the right positioning plate. Side interlayers are arranged on the left side wall and the right side wall of the box body, drawable side baffles are arranged in the side interlayers, first through hole sets are formed in the upper side wall and the lower side wall of the lower interlayer, and second through hole sets are formed in the left side wall and the right side wall of each side interlayer. Compared with the prior art, on one hand, double requirements of sintering and aging treatment are met, on the other hand, replacement of a magnet bearing structure is avoided, and the production efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a neodymium iron boron magnet production equipment technical field, concretely relates to a neodymium iron boron magnet aging treatment device. BACKGROUND

[0002] Neodymium iron boron is an important permanent magnet material, and is widely applied in the fields of electronics, automobiles, aerospace and the like due to its superior magnetic performance. The high remanence, high coercive force and good temperature stability of the neodymium iron boron magnet make it an important component in modern technology. At present, after high-temperature sintering forming of the neodymium iron boron magnet is completed, aging treatment is generally performed, the purpose being to optimize the microstructure of the magnet and promote generation of a large number of stable grain boundary phases, thereby improving the coercive force, squareness and other properties of the magnet.

[0003] CN 221841729 U discloses a sintering treatment equipment for sintered neodymium iron boron permanent magnet material, which comprises a vacuum sintering furnace, a sintering box and a sintering rack. The sintering box is used to seal the neodymium iron boron green body during the densification sintering process. The sintering rack is used to support the neodymium iron boron magnet during the aging and tempering process. The sintering rack is composed of a support rod and a support surface. The support rod is used to support the support surface, and the support surface is used to support the neodymium iron boron magnet. The sintering treatment equipment plays a supporting and protective role for the neodymium iron boron green body, prevents it from being oxidized during the sintering densification process, and improves the cooling rate of the neodymium iron boron magnet during the aging and tempering process, thereby improving the coercive force and other properties of the neodymium iron boron magnet after aging treatment. However, the following problems exist in the working process: the neodymium iron boron green body needs to be placed in the sintering box for sealing before being placed in the sintering furnace for sintering treatment. In order to meet the process requirements of the aging treatment, the sintered neodymium iron boron magnet is taken out of the sintering box and placed on the sintering rack for breaking the seal and facilitating cooling. However, this process results in low production efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a neodymium iron boron magnet aging treatment device with reasonable structure and reliable use, which can meet the requirements of sintering and aging treatment, avoid changing the magnet bearing structure, and significantly improve the production efficiency.

[0005] The technical scheme of the utility model is as follows:

[0006] The utility model provides a kind of neodymium iron boron magnet aging treatment device, including sintering furnace, bearing seat in sintering furnace, multiple bearing boxes are stacked above bearing seat, its technical key points are as follows: the bearing box includes cuboid box body, combined cover body being equipped in box body top, horizontal support wing plate being equipped in box body left, right side wall, the combined cover body is by with box body left, right upper along fixed left positioning plate, right positioning plate, detachable cover plate being supported between left positioning plate and right positioning plate, left support vertical plate being fixed on the upper surface of left, right positioning plate, right support vertical plate composition, the bottom surface of the box body is equipped with lower interlayer and is equipped with pullable lower baffle in lower interlayer, left, right side wall of the box body is equipped with side interlayer and is equipped with pullable side baffle in side interlayer, the upper, lower side wall of the lower interlayer is equipped with first through hole group, the left, right side wall of the side interlayer is equipped with second through hole group, the bearing box is located above left support vertical plate and right support vertical plate of vertically adjacent bearing box, and another bearing box is supported and positioned using horizontal support wing plate by two adjacent bearing boxes in the same horizontal.

[0007] The outer end surface of the detachable cover plate, the lower baffle and the side baffle is respectively provided with a pull handle in the same direction.

[0008] The bearing seat is composed of a bearing bottom plate and support legs arranged at four corners of the bearing bottom plate.

[0009] The lower surface of the left positioning plate and the right positioning plate is provided with a positioning groove corresponding to the upper edge of the box body.

[0010] The inner surface of the box body is provided with a boron nitride coating to avoid adhesion with the magnet at high temperature.

[0011] The utility model has the advantages that:

[0012] In use, the neodymium iron boron green body is placed in the bearing box, and then each bearing box is stacked on the bearing seat in the sintering furnace, which is in a sealed state and can be sintered at high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the utility model;

[0014] Figure 2 is a structural schematic view of the bearing box of the utility model;

[0015] Figure 3 is an outline drawing of the utility model;

[0016] Figure 4 is Figure 3 a plan view.

[0017] In the drawing: 1. combined cover, 101. left positioning plate, 102. right positioning plate, 103. left support vertical plate, 104. right support vertical plate, 105. detachable cover plate, 106. pull handle, 2. box body, 3. horizontal support wing plate, 4. bearing bottom plate, 5. support foot, 6. weight reduction hole group, 7. support rib group, 8. side baffle, 801. pull handle, 9. second through hole group, 10. first through hole group, 11. lower baffle, 1101. pull handle. DETAILED DESCRIPTION

[0018] The utility model is described in detail according to the drawings.

[0019] As Figures 1-4 shown, the neodymium iron boron magnet aging treatment device includes a sintering furnace (omitted in the drawing), a bearing seat in the sintering furnace and a plurality of bearing boxes stacked above the bearing seat.

[0020] The bearing box includes a cuboid box body 2, a combined cover 1 arranged on the top of the box body 2 and horizontal support wing plates 3 arranged on the left and right side walls of the box body 2. The combined cover is composed of a left positioning plate 101 and a right positioning plate 102 fixed on the left and right upper edges of the box body 2, a detachable cover plate 105 supported between the left positioning plate 101 and the right positioning plate 102, a left support vertical plate 103 and a right support vertical plate 104 fixed on the upper surfaces of the left and right positioning plates.

[0021] The bottom surface of the box body 2 is provided with a lower clamping layer, and the lower clamping layer is provided with a pullable lower baffle 11. The left and right side walls of the box body 2 are provided with side clamping layers, and the side clamping layers are provided with pullable side baffles 8. The upper and lower side walls of the lower clamping layer are provided with a first group of through holes 10, and the left and right side walls of the side clamping layer are provided with a second group of through holes 9. In this embodiment, the outer end surfaces of the detachable cover plate 105, the lower baffle 11 and the side baffle 8 are respectively provided with pull handles 106, 1101 and 801 which are in the same direction. The lower surfaces of the left positioning plate 101 and the right positioning plate 102 are provided with positioning grooves corresponding to the upper edges of the box body 2. The opposite ends of the left positioning plate 101 and the right positioning plate 102 are symmetrically provided with stepped retaining tables. The left and right edges of the detachable cover plate 105 are located on the stepped retaining tables of the left and right positioning plates. The upper edge of the front side wall of the box body 2 is provided with a pull-avoiding notch corresponding to the detachable cover plate 105.

[0022] The carrying box is located above the left and right support vertical plates 103 and 104 of the vertically adjacent carrying box, and the horizontally adjacent two carrying boxes are used to support and position another carrying box by using the horizontal support wing plate 3. The inner surface of the box body 2 is provided with a boron nitride coating to avoid adhesion with the magnet at high temperature. In this embodiment, the carrying seat is composed of a carrying bottom plate 4 and support feet 5 arranged at the four corners of the carrying bottom plate 4. The carrying bottom plate 4 is provided with a support rib group 7 corresponding to the carrying box and a weight-reducing hole group 6 arranged in a staggered manner with the support rib group 7.

[0023] Working principle:

[0024] 1. Place each neodymium-iron-boron green body in each carrying box, and then stack each carrying box on the carrying seat in the sintering furnace. At this time, it is in a sealed state, and high-temperature sintering can be carried out. Referring to Figure 1 , the vacuum degree of the sintering furnace is controlled to be below 5×10 -3 Pa, and high-temperature sintering is carried out at 950-1100℃ for 2-10 hours to obtain sintered neodymium-iron-boron magnets.

[0025] 2. After high-temperature sintering, the detachable cover plate 105, the lower baffle 11 and the side baffle 8 of each carrying box are removed by using tools, and aging treatment is carried out. At this time, the carrying box is in a ventilated state, which is beneficial to uniform heating and cooling. During the aging heat treatment, the first-stage aging temperature is 850-950℃, the heat preservation time is 2-5 hours, the second-stage aging temperature is 400-600℃, the atmosphere aging adopts inert gas, the pressure is 0.01-0.08MPa, the heat preservation time is 0.5-10 hours, and after the aging heat treatment is completed, the inert gas is extracted and nitrogen is filled again to cool to room temperature to obtain neodymium-iron-boron magnets.

[0026] The embodiments of the present application are described in detail above, but the content is only the preferred embodiments of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application are still within the scope of the present application.

Claims

1. An aging treatment apparatus for neodymium iron boron magnets, comprising a sintering furnace, a support base located in the sintering furnace, and a plurality of support boxes stacked on top of the support base, characterized in that: The carrier box includes a rectangular box body, a combined cover on the top of the box body, and horizontal support wing plates on the left and right side walls of the box body. The combined cover body consists of a left positioning plate and a right positioning plate fixed to the left and right upper edges of the box body, a detachable cover plate supported between the left and right positioning plates, and a left support upright plate and a right support upright plate fixed to the upper surface of the left and right positioning plates. The bottom surface of the box body has a lower interlayer with a pull-out lower baffle. The left and right side walls of the box body have side interlayers with pull-out side baffles. The upper and lower side walls of the lower interlayer have a first through hole group, and the left and right side walls of the side interlayer have a second through hole group. The carrier box is located above the left and right support upright plates of vertically adjacent carrier boxes. Two adjacent carrier boxes located on the same horizontal level use horizontal support wing plates to support and position another carrier box.

2. The neodymium iron boron magnet aging treatment apparatus according to claim 1, characterized in that: The outer end faces of the detachable cover, lower baffle, and side baffle are each provided with a pull handle in the same direction.

3. The neodymium iron boron magnet aging treatment device according to claim 1, characterized in that: The support base consists of a support base plate and support feet located at the four corners of the support base plate. The support base plate is provided with support ribs corresponding to the support box and weight reduction holes arranged interlaced with the support ribs.

4. The neodymium iron boron magnet aging treatment apparatus according to claim 1, characterized in that: The lower surfaces of the left and right positioning plates are provided with positioning grooves corresponding to the upper edge of the box body. The opposite ends of the left and right positioning plates are symmetrically provided with stepped baffles. The left and right edges of the detachable cover plate are located on the stepped baffles of the left and right positioning plates. The upper edge of the front side wall of the box body is provided with a pull-out clearance notch corresponding to the detachable cover plate.

5. The neodymium iron boron magnet aging treatment apparatus according to claim 1, characterized in that: The inner surface of the box is coated with boron nitride to prevent it from sticking to the magnet at high temperatures.

Images