CN216938422U - Hot pressing furnace for magnetic core forming - Google Patents
Hot pressing furnace for magnetic core forming Download PDFInfo
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- CN216938422U CN216938422U CN202122456863.8U CN202122456863U CN216938422U CN 216938422 U CN216938422 U CN 216938422U CN 202122456863 U CN202122456863 U CN 202122456863U CN 216938422 U CN216938422 U CN 216938422U
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Abstract
The utility model discloses a hot pressing furnace for forming a magnetic core, and relates to the technical field of magnetic core manufacturing equipment. The hot pressing furnace for forming the magnetic core comprises a uniform temperature area and an air channel area, wherein the uniform temperature area is positioned in a furnace body, the air channel area is positioned around the uniform temperature area, a heat shield, a heating body and a heat preservation layer are sequentially arranged between the uniform temperature area and the air channel area from inside to outside, and a fan is arranged between the uniform temperature area and the air channel area, so that heat generated by the heating body separated by the heat shield and the heat preservation layer can be pumped to the uniform temperature area through the air channel area and further uniformly mixed with protective gas in the uniform temperature area, and the aim of rapidly realizing uniform mixing of the temperature in the furnace can be fulfilled.
Description
Technical Field
The utility model relates to the technical field of magnetic core manufacturing equipment, in particular to a hot pressing furnace for forming a magnetic core.
Background
In the field of modern power electronic technology, in order to ensure the measurement accuracy of a transformer, a nanocrystalline alloy magnetic core with linear hysteresis loop characteristics is generally prepared, the magnetic core can realize a direct current resistance function, and meanwhile, the magnetic core also has lower residual magnetic polarization strength and small coercive force, so that the measurement error can be effectively reduced.
The nanocrystalline alloy magnetic core is generally formed in a hot pressing furnace because high-temperature heating and pressing are required during preparation. The existing hot pressing furnace usually adopts vacuum anti-oxidation treatment, and the treatment mode has two disadvantages, namely, the temperature in the furnace is not uniform, the temperature at different positions even differs by about 10 ℃, and the heating uniformity of a magnetic core blank is seriously influenced; secondly, the vacuum treatment mode also has the problems of slow temperature rise and slow temperature reduction, and the processing efficiency is seriously influenced. The furnace body of the existing hot pressing furnace is usually subjected to heat insulation treatment by adopting heat insulation cotton, the heat insulation mode has poor heat insulation effect and potential safety hazard, and the size of the furnace body is increased, so that the hot pressing furnace is inconvenient to install and transport. In addition, the existing hot-pressing furnace has the danger that the high pressure cannot be controlled in time and the phenomenon that the protective gas filled into the furnace body is wasted in the pressure balance process.
SUMMERY OF THE UTILITY MODEL
In order to overcome at least one of the defects of the prior art, the utility model aims to provide a hot pressing furnace for forming a magnetic core, which can quickly realize uniform temperature in the furnace.
The technical scheme adopted by the utility model to achieve the aim is as follows:
the hot pressing furnace for forming the magnetic core comprises a furnace body, wherein a uniform temperature area for heating a magnetic core blank to be processed and an air channel area positioned around the uniform temperature area are arranged in the furnace body, and a heat shield, a heating body and a heat preservation layer are sequentially arranged between the uniform temperature area and the air channel area from inside to outside; the furnace body is provided with a fan, the uniform temperature zone is filled with protective gas, and the fan pumps heat generated by the heating body to the uniform temperature zone through the air duct zone and uniformly mixes the heat with the protective gas.
The utility model provides a hot pressing furnace for magnetic core shaping through setting up the fan, can be with the produced heat of the heating member that is kept apart by heat shield and heat preservation, through wind channel district pump send to the homogeneous temperature district, and then with the protective gas misce bene of homogeneous temperature district to can reach the purpose that realizes the interior temperature misce bene of stove fast.
Preferably, the heat shield and the heat insulation layer enclose a heating space, the heating body is located in the heating space, the heat shield and the heat insulation layer are both provided with ventilation air ducts, and the ventilation air ducts are communicated with the heating space.
Preferably, the air inlet of the fan is located in the air duct area, and the air inlet of the fan corresponds to the ventilation air duct of the heat insulation layer.
Preferably, the fan is a turbo fan.
Preferably, the furnace body is provided with a vacuum-pumping device for pumping the interior of the furnace body into a vacuum state.
Preferably, the protective gas is nitrogen, and the furnace body is provided with a nitrogen inflation valve and an exhaust valve for exhausting gas in the furnace.
Preferably, the nitrogen gas charging valve comprises a slow charging valve for adjusting the pressure balance in the furnace and a fast charging valve for rapidly cooling the temperature in the furnace.
Preferably, the furnace body comprises an outer wall and an inner wall, and a double-layer water cooling structure is arranged between the outer wall and the inner wall.
Preferably, an upper pressure head is installed above the uniform temperature zone, a lower pressure head is installed below the uniform temperature zone, and the upper pressure head and/or the lower pressure head can move to enter the uniform temperature zone to perform hot pressing on the magnetic core material blank.
Preferably, the upper pressure head and/or the lower pressure head are/is a water-cooling pressure head with a water-cooling system.
In summary, the hot-pressing furnace for forming a magnetic core according to the present invention has the following technical effects:
1. the fan is arranged, so that heat generated by the heating body isolated by the heat shield and the heat-insulating layer can be pumped to the uniform temperature area through the air duct area and then is uniformly mixed with the protective gas of the uniform temperature area, and the aim of quickly realizing uniform temperature mixing in the furnace can be fulfilled;
2. through setting up fan, nitrogen gas charging valve and exhaust valve, when the cooling in the needs stove, when the exhaust valve discharges high-temperature gas in the stove, nitrogen gas charging valve supplyes new low temperature nitrogen gas, and through the fan as the power supply that the internal gas of furnace flows, because nitrogen gas is as the medium that prevents oxidation and temperature transmission, can reach like this and prevent the oxidation of internal matter of furnace, can ensure again that the balance of nitrogen gas carries out rapid cooling, can also keep the internal temperature of furnace balanced.
Drawings
Fig. 1 is a schematic sectional view of a hot press furnace for molding a magnetic core according to the present invention.
Wherein the reference numerals have the following meanings:
1-furnace body, 11-temperature equalizing zone, 12-air channel zone;
2-an upper pressure head;
3-pressing head;
4-a heat shield;
5-a heating body;
6-insulating layer;
7-a fan;
8-a vacuum-pumping device;
9-ventilation air duct.
Detailed Description
For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in figure 1, the utility model discloses a hot pressing furnace for forming a magnetic core, which comprises a furnace body 1, wherein a uniform temperature zone 11 and an air duct zone 12 are arranged in the furnace body 1, the air duct zone 12 is positioned around the uniform temperature zone 11, and the uniform temperature zone 11 is used for heating a magnetic core material blank to be processed and placed in the uniform temperature zone 11. An upper pressure head 2 is arranged above the uniform temperature zone 11, a lower pressure head 3 is arranged below the uniform temperature zone 11, the upper pressure head 2 and the lower pressure head 3 can move up and down relative to the furnace body 1, when a magnetic core blank needs to be hot-pressed, the upper pressure head 2 and/or the lower pressure head 3 move into the uniform temperature zone 11, and then the magnetic core blank in the uniform temperature zone 11 is hot-pressed to be formed into a magnetic core.
As shown in fig. 1, a heat shield 4, a heating body 5 and a heat preservation layer 6 are sequentially arranged between the uniform temperature region 11 and the air duct region 12 from inside to outside, a heating space is enclosed by the heat shield 4 and the heat preservation layer 6, and the heating body 5 is located in the heating space. Preferably, the heating body 5 is a resistance wire or a resistance belt made of a material which is not easy to volatilize under vacuum, for example, the heating body 5 is a resistance wire or a resistance belt made of a FeCrAl material, and the maximum heating power of the heating body 5 is not lower than 30 kW. The heat shield 4 is preferably a metal heat shield, the heat shield 4 and the heat preservation layer 6 are both provided with ventilation air channels 9, all the ventilation air channels 9 are communicated with the heating space, so that the gas in the uniform temperature region 11 can enter the heating space through the ventilation air channels 9 of the heat shield 4, and the gas in the heating space can enter the air channel region 12 through the ventilation air channels 9 of the heat preservation layer 6 after being heated by the heating body 5.
As shown in fig. 1, the furnace body 1 is provided with a fan 7, preferably, the fan 7 is a turbine fan 7, and of course, other types of fans can be selected according to actual situations. The fan 7 is located in the air duct area 12 and plays a role in protecting the fan 7, an air inlet of the fan 7 corresponds to or is over against the ventilation air duct 9 of the heat preservation layer 6, the fan 7 is started, the fan 7 pumps heat generated by the heating body 5 to the upper end and the lower end of the uniform temperature area 11 through the air duct area 12, so that the air entering the uniform temperature area 11 and the air inside the uniform temperature area are uniformly mixed in temperature, the air flow inside the uniform temperature area 11 enters the heating space through the ventilation air duct 9 of the heat insulation screen 4 to be heated, so that internal circulation of the gas in the furnace can be performed, the arrow in fig. 1 indicates the flow direction of the air flow, the uniform temperature area 11, the ventilation air duct 9 and the air duct area 12 form an annular air duct for internal circulation of the air flow together, and the purpose of rapidly achieving uniform temperature mixing in the furnace can be achieved.
In order to prevent the materials in the furnace body 1 from being oxidized at high temperature, the furnace body 1 is filled with protective gas, preferably, the protective gas is nitrogen. The fan 7 is used as a power source for gas flowing, so that the temperature uniformity of the protective gas in the furnace can be quickly realized.
The utility model provides a hot pressing furnace for magnetic core shaping through setting up fan 7 as the power supply that the gas flows, can be with the produced heat of heating member 5 that is kept apart by heat shield 4 and heat preservation 6, through wind channel district 12 pump send to uniform temperature zone 11, and then with the nitrogen gas misce bene of uniform temperature zone 11 to can reach the mesh of the interior temperature mixing homogenization of quick realization stove.
As shown in fig. 1, the furnace body 1 is provided with a vacuum extractor 8 for evacuating the interior of the furnace body 1 to a vacuum state. The furnace body 1 is also provided with a nitrogen gas charging valve and an exhaust valve for exhausting gas in the furnace. Before the furnace body 1 is filled with nitrogen, the vacuumizing device 8 is started to vacuumize the furnace body 1, and then the nitrogen is filled.
The nitrogen gas charging valve comprises a slow charging valve which can be used for adjusting the pressure balance in the furnace and a fast charging valve which can be used for rapidly cooling the temperature in the furnace. The nitrogen filling is carried out after the vacuumizing, the slow gas filling valve and the fast gas filling valve can be opened, when the furnace body 1 is filled with the nitrogen, the nitrogen completely protects the materials in the furnace body 1, the pressure in the furnace body 1 can be continuously increased due to continuous addition of the nitrogen, when the pressure reaches a preset upper limit value, for example, the upper limit value of a pressure sensor is reached, an exhaust valve is opened, the fast gas filling valve is closed, the slow gas filling valve is kept opened, the balance of the pressure in the furnace body 1 is realized in the continuous nitrogen filling and exhausting process, the danger generated in the furnace body 1 under a high-pressure state is effectively avoided, and the waste of the nitrogen can be reduced.
When the furnace is required to be cooled, the exhaust valve is opened to discharge high-temperature gas in the furnace, the speed valve of the nitrogen inflation valve is opened to supplement new low-temperature nitrogen, the fan 7 is arranged to serve as a power source for realizing internal circulation in the furnace through gas flowing in the furnace body 1, the nitrogen serves as a medium for preventing vacuum oxidation and temperature transmission in the furnace, so that the purposes of preventing oxidation of substances in the furnace body 1, ensuring the balance of the nitrogen in the furnace to rapidly cool and keeping the temperature balance in the furnace body 1 are achieved.
As shown in figure 1, the furnace body 1 is provided with a furnace door, the furnace body 1 and the furnace door both comprise an outer furnace wall and an inner furnace wall, and a double-layer water cooling structure is arranged between the outer furnace wall and the inner furnace wall. The double-layer water cooling structure is a cold water pipe arranged in double layers, the outer wall of the furnace and the inner wall of the furnace are made of stainless steel materials, and can be made of 1Cr18Ni9Ti stainless steel materials for example. The furnace body 1 with the double-layer water cooling structure and the inner wall and the outer wall made of stainless steel materials can effectively prevent the outer surface temperature of the outer wall of the furnace from being too high, eliminate the potential safety hazard of scalding and effectively reduce the volume and the thickness of the furnace body 1.
As shown in fig. 1, the upper ram 2 and the lower ram 3 are connected with a press machine located outside the furnace body 1, and the press machine drives the upper ram 2 and/or the lower ram 3 to move up and down to perform in-furnace hot press molding. When the magnetic core is molded by hot pressing, in order to prevent the upper pressure head 2 and/or the lower pressure head 3 from causing pressure instability due to thermal deformation under the high-temperature working environment in the furnace, the service life of the pressure head is influenced, a water cooling system is arranged in the upper pressure head 2 and/or the lower pressure head 3, and the water cooling system is a water cooling system in the existing die. In addition, because the upper pressure head 2 and/or the lower pressure head 3 are/is internally provided with the water cooling system, the manufacturing material of the upper pressure head 2 and/or the lower pressure head 3 has no strict or even harsh requirement, and the manufacturing cost of the upper pressure head 2 and/or the lower pressure head 3 is greatly reduced by using common stainless steel materials.
The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (10)
1. The hot pressing furnace for forming the magnetic core comprises a furnace body and is characterized in that a uniform temperature area for heating a magnetic core blank to be processed and an air channel area located around the uniform temperature area are arranged in the furnace body, and a heat shield, a heating body and a heat preservation layer are sequentially arranged between the uniform temperature area and the air channel area from inside to outside; the furnace body is provided with a fan, the uniform temperature zone is filled with protective gas, and the fan pumps heat generated by the heating body to the uniform temperature zone through the air duct zone and uniformly mixes the heat with the protective gas.
2. The autoclave of claim 1, wherein the heat shield and the insulating layer enclose a heating space, the heating body is located in the heating space, and the heat shield and the insulating layer are both provided with ventilation ducts, and the ventilation ducts are communicated with the heating space.
3. The autoclave of claim 2, wherein the air inlet of the fan is located in the air duct area, and the air inlet of the fan corresponds to the ventilation air duct of the insulating layer.
4. The autoclave for molding a magnetic core according to any one of claims 1 to 3, wherein the fan is a turbo fan.
5. The autoclave according to any one of claims 1 to 3, wherein the furnace body is provided with a vacuum extractor for evacuating the interior of the furnace body to a vacuum state.
6. The autoclave for molding a magnetic core according to any one of claims 1 to 3, wherein the protective gas is nitrogen, and the furnace body is provided with a nitrogen gas charging valve and an exhaust valve for exhausting gas in the furnace.
7. The autoclave of claim 6, wherein the nitrogen gas charging valves comprise a slow charging valve for adjusting the pressure balance in the oven and a fast charging valve for rapidly cooling the oven.
8. The autoclave according to any one of claims 1 to 3, wherein the furnace body comprises an outer furnace wall and an inner furnace wall, and a double-layer water cooling structure is provided between the outer furnace wall and the inner furnace wall.
9. The autoclave for molding the magnetic core according to any one of claims 1 to 3, wherein an upper pressing head is installed above the uniform temperature zone, a lower pressing head is installed below the uniform temperature zone, and the upper pressing head and/or the lower pressing head can enter the uniform temperature zone to perform hot pressing on the magnetic core blank.
10. The autoclave of claim 9, wherein the upper ram and/or the lower ram is a water-cooled ram having a water cooling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122456863.8U CN216938422U (en) | 2021-10-12 | 2021-10-12 | Hot pressing furnace for magnetic core forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122456863.8U CN216938422U (en) | 2021-10-12 | 2021-10-12 | Hot pressing furnace for magnetic core forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216938422U true CN216938422U (en) | 2022-07-12 |
Family
ID=82304068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122456863.8U Active CN216938422U (en) | 2021-10-12 | 2021-10-12 | Hot pressing furnace for magnetic core forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216938422U (en) |
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2021
- 2021-10-12 CN CN202122456863.8U patent/CN216938422U/en active Active
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