CN219024025U

CN219024025U - Aluminum alloy solution stirring device and vacuum induction furnace

Info

Publication number: CN219024025U
Application number: CN202223419450.3U
Authority: CN
Inventors: 王业双; 张良钰
Original assignee: Nasiway Technology Suzhou Co ltd
Current assignee: Nasiway Technology Suzhou Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-16
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses an aluminum alloy solution stirring device and a vacuum induction furnace, wherein the stirring device comprises a motor, a stirring shaft and a stirring disc, the motor acts on one end of the stirring shaft and can drive the stirring shaft to rotate, the stirring disc is fixed at the other end of the stirring shaft, a first gas channel is formed in the stirring shaft along the axial direction of the stirring shaft, a second gas channel communicated with the first gas channel is formed in the stirring disc, and the second gas channel is perpendicular to the first gas channel. According to the stirring device, the stirring shaft is communicated with the external air inlet device, and in the rotating process, stirring and mixing are performed in the aluminum alloy melt body through the sprayed gas, so that the stirring device is long in service life and good in stirring effect.

Description

Aluminum alloy solution stirring device and vacuum induction furnace

Technical Field

The utility model relates to the technical field of metallurgy, in particular to an aluminum alloy solution stirring device and a vacuum induction furnace.

Background

The aluminum alloy has the advantages of small density, high specific strength, easy forming and the like, and is widely applied to the fields of aerospace, transportation, machinery and the like.

In the prior art, aluminum alloy is generally heated and smelted in a crucible, aluminum alloy melt is stirred by a stirrer in the smelting process, the stirrer comprises a stirring shaft and stirring blades fixed at the tail end of the stirring shaft, the stirring blades in the stirrer are easy to deform after long-term use, the service life is low, and the problem of poor stirring effect exists.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide an aluminum alloy solution stirring device and a vacuum induction furnace, which can solve the technical problems of easy deformation of stirring blades, low service life and poor stirring effect in the prior art.

To achieve the above object, an embodiment of the present utility model provides an aluminum alloy solution stirring apparatus including a motor, a stirring shaft, and a stirring plate, the motor acting on one end of the stirring shaft and being rotatable, the stirring plate being fixed to the other end of the stirring shaft, wherein,

the stirring shaft is provided with a first gas channel along the axial direction of the stirring shaft, the stirring disc is provided with a second gas channel communicated with the first gas channel, and the second gas channel is perpendicular to the first gas channel.

In one or more embodiments of the present utility model, the stirring plate is a circular plate, and the end of the stirring shaft is fixed at the center of the circular plate.

In one or more embodiments of the present utility model, the stirring disk is provided with a plurality of second gas channels along a radial direction thereof.

In one or more embodiments of the utility model, the stirring shaft and/or stirring disk are made of SiC material.

In one or more embodiments of the utility model, the stirring shaft and stirring disk are integrally formed.

To achieve the above object, an embodiment of the present utility model also provides a vacuum induction furnace for aluminum alloy ingot production, comprising:

the furnace body is provided with a smelting chamber;

the crucible is arranged in the smelting chamber, and a pouring gate is arranged at the bottom of the crucible and provided with a pouring valve;

the stirring disc of the stirring device is rotatably arranged in the crucible;

and the heating device is arranged in the smelting chamber and used for heating the crucible.

In one or more embodiments of the present utility model, the furnace body is further provided with a cooling chamber communicating with the smelting chamber, the cooling chamber being provided at one side below the smelting chamber.

In one or more embodiments of the utility model, a cooling valve is provided between the smelting chamber and the cooling chamber.

In one or more embodiments of the utility model, the bottom of the melting chamber is provided with an ingot mould, which is movable between the melting chamber and a cooling chamber.

In one or more embodiments of the present utility model, a vacuum sampling mechanism is further provided on the furnace body, and the vacuum sampling mechanism is used for sampling and detecting the alloy liquid in the crucible.

Compared with the prior art, the stirring device has the advantages that the stirring shaft is communicated with the external air inlet device, in the rotating process, the stirring shaft is stirred and mixed in the aluminum alloy melt body through the sprayed gas, the service life of the stirring device is long, and the stirring effect is good.

Drawings

FIG. 1 is a schematic view showing a structure of a vacuum induction furnace according to an embodiment of the present utility model;

fig. 2 is a schematic view of a stirring structure according to an embodiment of the present utility model.

Detailed Description

The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

As shown in fig. 1, a vacuum induction furnace 10 according to a preferred embodiment of the present utility model is used for the smelting manufacture of aluminum alloy ingots, particularly for the smelting manufacture of low hydrogen content aluminum alloy ingots. The vacuum induction furnace 10 includes a furnace body 11, a crucible 12 provided in the furnace body 11, and a stirring device 13 for mixing melt in the crucible 12.

The furnace body 11 is provided with a smelting chamber 111, one side of the bottom of the smelting chamber 111 is provided with a cooling chamber 112, and the cooling chamber 112 is communicated with the smelting chamber 111.

The bottom of the melting chamber 111 is provided with an ingot mould 14, the ingot mould 14 corresponding to the lower part of the crucible 12 and being movable between the melting chamber and the cooling chamber 112.

In one embodiment, the bottom of the ingot mould 14 is provided with rollers, and in other embodiments the ingot mould 14 may also be slid between the melting chamber 111 and the cooling chamber 112 by rails.

A cooling valve 1121 is also provided between the melting chamber 111 and the cooling chamber 112, the cooling valve 1121 being kept closed during the melting process and before the alloy liquid in the crucible 12 enters the ingot mould 14. After the ingot mold 14 receives the alloy liquid, the ingot mold 14 is cooled by opening the cooling valve 1121 so that the ingot mold 14 enters the cooling chamber 112.

The crucible 12 is supported in the melting chamber 111 and is externally wound with a heating device 121, which heating device 121 is preferably a heating coil, which is electrically connected to an induction power supply 15 located outside the furnace body 11.

The bottom of the crucible 12 is provided with a pouring spout 122, and the pouring spout 122 is provided with a pouring valve 123 for switching the pouring spout 122. After the aluminum alloy liquid is melted in the crucible 12, it enters the ingot mold 14 through the pour spout 122.

The furnace body 11 is also provided with a vacuum sampling mechanism 16, and the vacuum sampling mechanism 16 is used for sampling and detecting the alloy liquid in the crucible 12 so as to test the alloy components, hydrogen content and inclusion content of the alloy liquid.

The furnace body 11 is also connected with a vacuum unit 17, and the vacuum unit 17 is communicated with the furnace body 11 and can be used for vacuumizing the furnace body 11.

As shown in fig. 2, the stirring device 13 includes a motor, a stirring shaft 131, and a stirring disk 132, wherein the motor acts on one end of the stirring shaft 131 and can drive the stirring shaft to rotate, and the stirring disk 132 is fixed on the other end of the stirring shaft 131.

The stirring shaft 131 is preferably a round rod, a first gas channel 1311 is axially formed along the stirring shaft, a second gas channel 1321 is formed on the stirring disc 132 and is communicated with the first gas channel 1311, and the second gas channel 1321 is perpendicular to the first gas channel 1311.

In one embodiment, the stirring disk 132 is a circular disk, and the end of the stirring shaft 131 is fixed at the center of the circular disk 132.

Further, the stirring plate 132 is provided with a plurality of second gas passages 1321 along a radial direction thereof.

In one embodiment, the stirring shaft 131 and stirring disk 132 are made of SiC material. The stirring shaft 131 and the stirring disk 132 may be integrally formed or may be separately fixed.

In this technical scheme, during operation, first gas passageway 1311 in (mixing) shaft 131 communicates with outside air supply, and during the stirring process, agitator disk 132 is driven to rotate in the alloy liquid, and simultaneously the gas sprayed out through second gas passageway 1321 is disturbed in the alloy liquid, thereby realizing the rapid mixing effect.

The smelting method of the aluminum alloy ingot by using the device comprises the following steps:

step 1: raw material treatment, namely cleaning the surfaces of all raw materials for preparing aluminum alloy ingots, and enabling the water content of all the raw materials to be not higher than 0.1%;

step 2: charging, namely placing the treated raw materials into a crucible of a vacuum induction furnace, and vacuumizing to ensure that the absolute vacuum degree in the vacuum induction furnace is 0.1-100 Pa;

step 3: heating the crucible to 120-200 ℃, preserving heat for 5-10 min, and continuously vacuumizing to maintain the vacuum degree in the vacuum induction furnace;

step 4: inflating, stopping vacuumizing, and filling protective gas into the vacuum induction furnace to ensure that the absolute vacuum degree in the vacuum induction furnace is 60-80 kPa;

step 5: smelting, namely heating the crucible to a smelting temperature to melt raw materials into alloy liquid, preserving heat for 20-40 min, and stirring the alloy liquid;

step 6: casting, namely standing the alloy liquid for 3-5 min, sampling and detecting, cooling to the casting temperature after the alloy liquid is qualified, and casting in an induction furnace to obtain the aluminum alloy ingot with low hydrogen content.

Wherein, the purity of the protection gas filled in the step 4 is not lower than 99.99%, and the protection gas is preferably one of nitrogen, argon and helium.

The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims

1. An aluminum alloy solution stirring device is characterized by comprising a motor, a stirring shaft and a stirring disc, wherein the motor acts on one end of the stirring shaft and can drive the stirring shaft to rotate, the stirring disc is fixed at the other end of the stirring shaft,

2. The aluminum alloy solution stirring device as recited in claim 1, wherein the stirring plate is a circular plate, and the end of the stirring shaft is fixed at the center of the circular plate.

3. The aluminum alloy solution stirring apparatus as recited in claim 2, wherein a plurality of second gas passages are provided in a radial direction thereof on the stirring plate.

4. The aluminum alloy solution stirring device as recited in claim 1, wherein the stirring shaft and/or stirring disk are/is made of SiC material.

5. The aluminum alloy solution stirring device as recited in claim 1, wherein the stirring shaft and the stirring disk are integrally formed.

6. A vacuum induction furnace, comprising:

the furnace body is provided with a smelting chamber;

the stirring device of any one of claims 1 to 5, wherein a stirring plate thereof is rotatably provided in said crucible;

7. The vacuum induction furnace according to claim 6, wherein said furnace body is further provided with a cooling chamber communicating with said melting chamber, said cooling chamber being provided on a side below said melting chamber.

8. The vacuum induction furnace of claim 7, wherein a cooling valve is disposed between said melting chamber and cooling chamber.

9. The vacuum induction furnace according to claim 6, wherein the bottom of said melting chamber is provided with an ingot mould that is movable between said melting chamber and cooling chamber.

10. The vacuum induction furnace of claim 6, wherein the furnace body is further provided with a vacuum sampling mechanism for sampling and detecting the alloy liquid in the crucible.