CN111653418A - Powder compression molding device and preparation system of magnetic element - Google Patents
Powder compression molding device and preparation system of magnetic element Download PDFInfo
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- CN111653418A CN111653418A CN202010468917.XA CN202010468917A CN111653418A CN 111653418 A CN111653418 A CN 111653418A CN 202010468917 A CN202010468917 A CN 202010468917A CN 111653418 A CN111653418 A CN 111653418A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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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
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
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- Powder Metallurgy (AREA)
Abstract
The application provides a powder suppression device and magnetic element's preparation system relates to powder shaping technical field. The powder pressing device comprises a feeding mechanism, a feeding mechanism and a forming die; the feeding mechanism is used for feeding powder materials; the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, the feeding mechanism is used for injecting powder materials into the forming die, and the forming die is used for pressing the powder materials into elements; wherein at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming die are provided with a heating mechanism and/or a heat preservation mechanism. The powder pressing device has the characteristics of low forming pressure, high efficiency, high saturation magnetic flux density Bs of the magnetic element obtained by forming and the like, and can solve the problems that the forming efficiency of the existing powder pressing device is low, a die is easy to damage and the like.
Description
Technical Field
The application relates to the technical field of powder forming, in particular to a powder pressing device and a preparation system of a magnetic element.
Background
The soft magnetic material can be used as an important component material, can be made into a magnetic core for manufacturing various inductors, transformers, filters, chokes and the like, and is widely applied to the fields of modern electric power, electronic information and the like, such as industrial automation, automobiles, office automation equipment, computers, external equipment, digital communication and analog communication equipment, the internet, household appliances, aerospace, military and the like.
For example, a large number of magnetic components are applied to automobiles, and the magnetic components are used as key components in automobile electronic technology, and have wide applications in automobiles, such as automobile safety and information systems, electronic control units, vehicle-mounted multimedia systems, energy transmission systems, and the like. At present, magnetic components applied to automobile electronic technology are mainly made of soft magnetic ferrite materials, iron-based soft magnetic composite materials and neodymium iron boron rare earth permanent magnetic materials. In recent years, with the development of industry, science, and electronics, automobiles are being made lighter, more intelligent, and more electrified, and the demand for magnetic materials is increasing. The existing common iron-based metal magnetic core material has high power consumption, and particularly has obvious defects in various application occasions with large direct current superposition and low voltage. Therefore, in order to be able to function even under severe temperature conditions such as ambient temperature changes and engine room heat generation, it is required to maintain a high saturation magnetic flux density or saturation magnetic induction (Bs) under high temperature conditions in addition to low power consumption under high temperature conditions. Generally, for the same material, the main approach to increase the iron-based soft magnetic composite Bs is to increase its molding density.
At present, in order to improve the saturation magnetic flux density Bs of the soft magnetic composite material, the commonly adopted measure is to improve the tonnage of a press and directly increase the forming pressure. However, the direct consequence of this is that the mould is extremely worn, the costs increase and even the mass production is impossible, and in addition, the high costs associated with the increase of the tonnage of the press are involved.
Disclosure of Invention
The application aims to provide a powder pressing device and a preparation system of a magnetic element, which have the characteristics of lower forming pressure, higher efficiency, higher saturation magnetic flux density Bs of the magnetic element obtained by forming and the like, and can overcome the problems or at least partially solve the technical problems.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
according to one aspect of the present application, there is provided a powder pressing device comprising a feeding mechanism, a charging mechanism, and a forming die;
the feeding mechanism is used for feeding powder materials; the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, the feeding mechanism is used for injecting powder materials into the forming die, and the forming die is used for pressing the powder materials into elements;
wherein at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming die are provided with a heating mechanism and/or a heat preservation mechanism.
In a possible implementation manner, the heating mechanism includes a first heating mechanism and a second heating mechanism, the first heating mechanism is disposed in the feeding mechanism, and the second heating mechanism is disposed in the forming mold.
In one possible implementation, the feeding mechanism comprises a hopper, and the first heating mechanism comprises a first heating element and a first temperature control member;
the first temperature control component is used for monitoring the temperature of the powder material in the hopper, and the first heating element is arranged on the side wall of the hopper.
In a possible implementation manner, the powder pressing device further includes a stirring mechanism, and at least a part of the stirring mechanism is disposed inside the hopper.
In a possible implementation manner, the forming mold comprises an upper mold, a female mold and a lower mold, the female mold is arranged below the upper mold, the lower mold is arranged below the female mold, and the second heating mechanism comprises a second heating element and a second temperature control part;
the second temperature control component is used for monitoring the temperature of powder materials in the forming die, and the second heating element is arranged on the side wall of the female die.
In a possible implementation manner, the heat preservation mechanism comprises a first heat preservation mechanism and a second heat preservation mechanism, the first heat preservation mechanism is arranged on the connecting pipe, and the second heat preservation mechanism is arranged on the feeding mechanism.
In a possible implementation manner, the first heat-preservation mechanism includes a first heat-preservation layer, and the first heat-preservation layer is wrapped on the outer periphery of the connection pipe.
In a possible implementation manner, the second heat insulation mechanism includes a second heat insulation layer, and the second heat insulation layer is wrapped on the outer side wall of the charging mechanism.
In a possible implementation manner, the feeding mechanism and the forming die are both provided with the heating mechanism;
the connecting pipe with reinforced mechanism all is provided with heat preservation mechanism.
According to another aspect of the present application, there is provided a manufacturing system of a magnetic element, including the powder pressing apparatus as described above.
Compared with the prior art, the technical scheme provided by the application can achieve the following beneficial effects:
the powder pressing device comprises a feeding mechanism, a feeding mechanism and a forming die, wherein the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming die are provided with a heating mechanism and/or a heat preservation mechanism, so that the powder material is more favorably heated and preserved, the powder with higher hardness is softened, a batch piece with the same effect as cold press forming can be achieved, and the forming pressure can be reduced by about 30%; the forming efficiency is not influenced, and the forming efficiency is higher; compared with the prior art, the saturation magnetic flux density Bs of the components are the same or higher, the service life and the efficiency of the die can be prolonged to a great extent, the cost is reduced, and the mass production of the components is realized.
Therefore, the powder pressing device is simple and compact in structure, convenient to operate, low in forming pressure and efficiency, high in saturation magnetic induction Bs of the magnetic component obtained by forming, good in strength, not prone to damage of a die, low in production cost and the like, and can be widely applied to manufacturing of various magnetic components.
The preparation system of the magnetic element comprises the powder pressing device, has all the characteristics and advantages of the powder pressing device, and is not repeated herein.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a powder pressing apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another powder pressing apparatus provided in an embodiment of the present application.
Icon:
1-a feeding mechanism;
2-connecting pipe;
3-a feeding mechanism;
4-forming a mould; 41-type above; 42-mother type; 43-down type; 401-a mold cavity;
5-a stirring mechanism;
6-a platform;
7-a heating mechanism;
71-a first heating mechanism; 711-a first heating element; 712-a first temperature control component;
72-a second heating mechanism; 721-a second heating element; 722-a second temperature control member;
8-a heat preservation mechanism;
81-a first heat preservation mechanism;
82-a second heat preservation mechanism;
9-powder material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, the term "plurality" means two or more unless explicitly stated or limited otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", and the like used in the description of the embodiments of the present application are used in the description of the embodiments shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
Unless defined or indicated otherwise, technical and scientific terms used herein have the same meaning as is familiar to those skilled in the art.
As will be understood by those skilled in the art, as the background art, in order to increase the saturation magnetic flux density Bs of the soft magnetic composite material, the commonly adopted measure is to increase the tonnage of the press, directly increase the forming pressure, and have the disadvantages of serious die loss, high cost, difficulty in realizing mass production, and the like.
In addition, in order to increase the saturation magnetic flux density Bs of the magnetic material, there is a method of heating a mold, for example, a mold heating molding process disclosed in patent publication No. CN 109878112a, in which a mold is heated and then the heat is transferred to a workpiece (element) in a mold cavity. However, the existing heating mode has the disadvantages that the workpiece is heated unevenly, and the hot pressing effect is influenced; in addition, the mode of heating the die is adopted, heat needs to be transferred to the workpiece from the die, long time is needed, time is consumed, and forming efficiency is low. For example, if the cold-press forming efficiency is 20 pieces/minute, i.e. 3 seconds by one, that is, the heating of the mold is required to heat the workpiece fed into the cavity to the required temperature within a short time of 3 seconds and to make the temperature uniform, it is difficult to achieve the cold-press forming efficiency. Therefore, based on the existing device structure or operation mode, the efficiency of heating the mold cavity is greatly reduced in order to achieve the hot pressing effect. Generally, if the size of the pressing member is taken into consideration, the molding efficiency of the mold heating mode is reduced by at least 20 times or more than that of the cold pressing mode. Therefore, the forming efficiency of the existing hot-press forming method is far lower than that of cold-press forming if the existing hot-press forming method is used for achieving the batch with the same effect as cold pressing.
Therefore, in order to overcome the defects of the prior art, meet the higher requirements of the market on magnetic materials nowadays, improve the saturation magnetic flux density Bs after the magnetic powder material is pressed and molded, and optimize the magnetic performance of the magnetic element, the technical scheme of the embodiment of the application provides a powder pressing device and a preparation system of the magnetic element. The device can improve shaping efficiency, reduces forming pressure, reaches the volume production level, and the device simple structure, and the operation mode is also very convenient.
In one embodiment, the present application is described in further detail below with reference to specific embodiments and accompanying drawings.
Referring to fig. 1 and fig. 2, an embodiment of the present application provides a powder pressing apparatus, which includes a feeding mechanism 1, a feeding mechanism 3, and a forming mold 4;
the feeding mechanism 1 is used for feeding the powder material 9; the feeding mechanism 3 is communicated with the feeding mechanism 1 through a connecting pipe 2, the feeding mechanism 3 is used for injecting powder materials 9 into a forming die 4, and the forming die 4 is used for pressing the powder materials 9 into elements;
wherein, at least two of the feeding mechanism 1, the connecting pipe 2, the feeding mechanism 3 and the forming die 4 are provided with a heating mechanism 7 and/or a heat preservation mechanism 8.
The powder pressing device can be used for pressing and forming soft magnetic materials in a powder state, and further can be used for pressing and forming iron-based soft magnetic composite materials; of course, the method can also be used for compression molding of other types of soft magnetic materials, and the embodiment of the application is not limited to specific types and sources of powder materials.
In the powder pressing device, a feeding mechanism 1 can be used for supplying or providing or storing powder materials 9, and a discharge port of the feeding mechanism 1 can be connected with an inlet of a feeding mechanism 3 through a connecting pipe 2; the feeding mechanism 3 can be used for injecting or feeding the powder material 9 into the mold cavity 401 of the molding mold 4, and an outlet of the feeding mechanism 3 can be communicated with the mold cavity 401 of the molding mold 4; the molding die 4 includes a die cavity 401, which may also be referred to as a cavity, and is a space in the die where a component (element) is molded, and the powder material 9 is placed in the die cavity 401 and may be pressed into the element.
Note that the above-described supply mechanism 1, the connection pipe 2, the feeding mechanism 3, and the molding die 4, at least two of which are provided with the heating mechanism 7 and/or the heat-retaining mechanism 8, means that any two or more of the supply mechanism 1, the connection pipe 2, the feeding mechanism 3, and the molding die 4 may be provided with the heating mechanism 7 and/or the heat-retaining mechanism 8. The arrangement modes of the heat preservation mechanism 7 and the heating mechanism 8 in the feeding mechanism 1, the connecting pipe 2, the feeding mechanism 3 and the forming die 4 have various forms. For example, the heating mechanism may be provided only in the feeding mechanism and the molding die; or, heating mechanisms can be arranged in the feeding mechanism and the forming die, and heat preservation mechanisms are arranged in the connecting pipe and the feeding mechanism; or heating mechanisms can be arranged in the feeding mechanism, the feeding mechanism and the forming die; alternatively, the feeding mechanism may be provided with a heating mechanism, and the connecting pipe, the feeder, and the molding die may be provided with a heat-insulating mechanism. Of course, the arrangement of the heat preservation mechanism and the heating mechanism can also be in other various forms, and the detailed description is omitted.
Therefore, the powder pressing device adopts a hot-press molding mode, and at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the molding die are provided with the heating mechanism and/or the heat preservation mechanism, so that the powder pressing device is more beneficial to heating and heat preservation of powder materials, the powder with higher hardness is softened, a batch piece with the same effect as cold-press molding can be achieved, and the molding pressure can be reduced by about 30%; the forming efficiency is not influenced, and the forming efficiency is higher; compared with the prior art, the saturation magnetic flux density Bs of the components are the same or higher, the service life and the efficiency of the die can be prolonged to a great extent, the cost is reduced, and the mass production of the components is realized.
In order to further improve the molding efficiency and achieve mass production level, and to make the Bs of the obtained molding element higher, as shown in fig. 1 or fig. 2, in some embodiments, the feeding mechanism 1 and the molding die 4 are provided with heating mechanisms 7;
the connecting pipe 2 and the feeding mechanism 3 are both provided with a heat preservation mechanism 8. In this way, after the powder material 9 is heated by the heating mechanism 7 provided in the feeding mechanism 1, it is introduced into the cavity 401 of the molding die 4 provided with the heating mechanism 7 via the connecting pipe 2 provided with the heat retaining mechanism 8 and the feeder 3 provided with the heat retaining mechanism 8, and the powder material is heated and softened, and is pressurized in a heat retaining or predetermined state, whereby a high-density magnetic element such as a high-density magnetic core can be formed after press molding. Furthermore, the high-density magnetic core has higher magnetic conductivity, and is favorable for improving the magnetic performance of the magnetic component.
This powder suppression device has adopted the mode of heating simultaneously to feed mechanism 1 and forming die 4 to the mode that keeps warm simultaneously to connecting pipe 2 and reinforced mechanism 3. Specifically, the powder material such as an iron-based soft magnetic composite powder material is heated by the heating mechanism to soften the powder, meanwhile, the heat preservation mechanism is arranged on the connecting pipe and the feeding mechanism through which the heated powder flows, and the forming die is heated, so that the temperature in the die cavity of the die and the temperature of the powder material can be kept to be the same, the temperature of the powder material can be kept unchanged when the powder material is added into the die cavity of the die, and the forming efficiency is not influenced finally.
From this, this powder suppression device can heat shaping iron-based soft magnetic composite powder, makes the powder that hardness ratio is higher soften, can reach the batch piece of the same effect of colding pressing, and forming pressure can reduce about 30% to when reaching that the components and parts that the shaping obtained are the same or higher Bs, to a great extent has improved the life and the efficiency of mould, realizes the device volume production.
Optionally, the connection pipe 2 may be a hose, that is, the connection pipe may be made of a soft material. Therefore, the connection between the feeding mechanism and the charging mechanism is facilitated, and the cost is reduced.
Optionally, the material of the feeding mechanism 1 may be metal, and further may be stainless steel or a material with a good heat conduction effect, which is helpful for heating the powder material, and can realize the effect of continuously heating the powder material.
Optionally, the feeding mechanism 1 may be a conical or funnel-shaped structure, and the cross-sectional shape of the feeding mechanism may be an inverted trapezoid, so that feeding, charging and powder material circulation are facilitated.
Optionally, the feeding mechanism 3 may be a feeder, and the feeder may also include a tapered or funnel-shaped structure, and the cross-sectional shape of the feeder may be a regular trapezoid, so that feeding and circulation of the powder material are facilitated.
It should be understood that, in the embodiment of the present application, the specific shape, structure or material of the connecting pipe 2, the feeding mechanism 1 and the feeding mechanism 3 are not limited, and can be designed by those skilled in the art according to practical situations, as long as the purpose of the present application is not limited.
As shown in fig. 1 or fig. 2, in some embodiments, the heating mechanism 7 includes a first heating mechanism 71 and a second heating mechanism 72, the first heating mechanism 71 is disposed on the feeding mechanism 1, and the second heating mechanism 72 is disposed on the molding die 4.
Through heating feeding mechanism and forming die simultaneously, make the powder material soften, can improve shaping efficiency to shaping pressure is less, and the saturation magnetic flux density Bs of the components and parts that obtain is high, and intensity is good, and the mould is not fragile, can reduction in production cost.
Specifically, in some embodiments, the feeding mechanism 1 includes a hopper (loading hopper), the first heating mechanism 71 includes a first heating element 711 and a first temperature control member 712;
the first temperature control part 712 is used to monitor the temperature of the powder material 9 in the hopper, and the first heating element 711 is provided at the side wall of the hopper. Therefore, the powder material in the hopper can be heated, and the heating of the powder material in the hopper can be observed or regulated in real time through the arrangement of the temperature control component.
Optionally, the first temperature control component may be electrically connected to the first heating element, or a plurality of temperature detection points may be disposed in the hopper or on the sidewall of the hopper, a probe for detecting temperature may be disposed at the temperature detection points, and the first temperature control component may be electrically connected to the probe.
It should be noted that, the specific structure or type of the first temperature control component and the first heating element is not limited in the embodiments of the present application, and the present temperature monitoring or regulating device and the present heating device can be adopted, and the specific structure or type can be selected and set by those skilled in the art according to the actual needs. For example, the first heating element may be a heating rod, but is not limited thereto, and may also be a heating belt, a heating plate, a heating pipe, or the like.
Alternatively, the first heating element 711 may include a plurality of heating rods, and the plurality of heating rods are uniformly spaced at the sidewall of the hopper, for example, at least one ring of heating rods may be disposed on the outer sidewall of the hopper. Therefore, the powder heating device is more beneficial to heating the powder, can improve the heating effect on the powder material in the hopper, and is uniform in heating.
The hopper can be made of stainless steel or a material with a good heat conduction effect, at least one circle of heating rod is arranged on the outer side wall of the hopper, powder materials such as iron-based soft magnetic metal powder materials can be continuously heated, and the temperature needs to be controlled above the softening temperature of the iron-based soft magnetic metal powder materials during heating.
Further, in order to better ensure the temperature uniformity of the powder material, as shown in fig. 1 or fig. 2, in some embodiments, the powder pressing apparatus further includes a stirring mechanism 5, and at least a part of the stirring mechanism 5 is disposed inside the hopper.
Optionally, the stirring mechanism 5 includes a stirring rod, and may further include a driving structure for driving the stirring rod to rotate. At least part of the stirring rod can be arranged in the hopper and used for stirring the powder material, so that heat transfer and mass transfer can be enhanced, the powder material is heated more uniformly, and the magnetic performance of the magnetic element obtained by press forming is improved.
In some embodiments, as shown in fig. 1 or fig. 2, the forming mold 4 includes an upper mold 41, a female mold 42, and a lower mold 43, the female mold 42 is disposed below the upper mold 41, the lower mold 43 is disposed below the female mold 42, the second heating mechanism 72 includes a second heating element 721 and a second temperature control member 722;
the second temperature control part 722 is used for monitoring the temperature of the powder material 9 in the forming mold 4, and the second heating element 721 is disposed on the side wall of the female mold 42. Therefore, the powder material in the forming die can be heated, and the heating of the powder material in the forming die can be observed or regulated in real time through the arrangement of the temperature control part.
Optionally, the second temperature control component may be electrically connected to the second heating element, or a plurality of temperature detection points may be disposed on the mother-type sidewall, a probe for detecting temperature may be disposed at the temperature detection points, and the second temperature control component may be electrically connected to the probe.
It should be noted that, the specific structure or type of the second temperature control component and the second heating element in the embodiments of the present application is not limited, and the present temperature monitoring or regulating device and the present heating device can be adopted, and the specific structure or type can be selected and set by those skilled in the art according to the actual needs. For example, the second heating element may be a heating rod, but is not limited thereto, and may also be a heating belt, a heating plate, a heating pipe, or the like.
Optionally, the second heating element 722 may include a plurality of heating rods, the plurality of heating rods are uniformly arranged on the sidewall of the female mold 42 at intervals, for example, a ring of heating rods may be disposed on the periphery of the sidewall of the female mold to heat the female mold, so as to keep the temperature in the mold cavity consistent with the temperature of the heated powder.
Thereby, set up in feeding mechanism and forming mechanism's first temperature control part, first heating element, rabbling mechanism, first temperature control part and first heating element more than based on to and set up in the setting of the heat preservation mechanism of connecting pipe and reinforced mechanism, can guarantee that the powder suppression device's that this application embodiment provided hot pressing efficiency reaches the same efficiency with traditional colding pressing, and can also improve the saturation magnetic flux density Bs of compression moulding's magnetic element on the basis, and improve strength reduces forming pressure.
The forming mold 4 includes an upper mold 41, a female mold 42, and a lower mold 43, the female mold 42 may be disposed vertically below the upper mold 41, and the lower mold 43 may be disposed vertically below the female mold 42; wherein the upper die 41 may comprise an upper punch, the female die 42 may be internally provided with a die cavity 401, and the lower die 43 may comprise a lower punch. Further, the powder compaction apparatus may further include a stage 6 or table, wherein the upper mold 41 is positioned above the stage 6, and the female mold 42 and the lower mold 43 are positioned below the stage 6. In the working process, the powder material is placed in the die cavity of the female die, the upper punch extrudes the powder material in the die cavity downwards, and the lower end face of the powder material is extruded by the lower punch to be fully compressed. In the embodiment of the present application, the illustrated composition or structure of the upper mold, the female mold and the lower mold does not specifically limit the molding die. For example, in other embodiments of the present application, the forming mold may include more or fewer devices, or combine some components, or separate some components, or arrange different components, or the forming mold may form a plurality of small magnetic elements at a time, or the forming mold may form magnetic elements with different shapes.
The embodiment of the application does not limit the specific shape and structure of the forming die, correspondingly, the specific shape and structure of the magnetic element obtained by press forming, and the specific shape and structure of the magnetic element can be adjusted correspondingly with the specific arrangement of the die cavity, the upper punch, the lower punch and the like. For example, the prepared magnetic element may be a magnetic core, and the magnetic core may be a circular ring structure, but may also be a square structure having an inner hole, or other similar structures.
In some embodiments, as shown in fig. 1 or fig. 2, the heat-preserving mechanism 8 includes a first heat-preserving mechanism 81 and a second heat-preserving mechanism 82, the first heat-preserving mechanism 81 is disposed on the connecting pipe 2, and the second heat-preserving mechanism 82 is disposed on the charging mechanism 3. Thus, the temperature of the powder material can be maintained constantly and well.
Specifically, in some embodiments, the first heat-preserving mechanism 81 includes a first heat-preserving layer coated on the outer circumference of the connection pipe 2.
At least one layer of heat preservation layer is coated on the outer side of the connecting pipe, so that the heat preservation effect on the powder material can be achieved, heat loss is prevented, the temperature of the powder material can be kept well all the time, the forming efficiency is improved, the forming pressure is reduced, and the Bs of the magnetic element obtained by forming are improved. The heat insulation material of the first heat insulation layer may be a light heat insulation material with a small thermal conductivity coefficient, for example, the heat insulation material may be heat insulation cotton, and the specific type of the heat insulation material is not limited in the embodiment of the present application.
Specifically, in some embodiments, the second insulating layer 82 includes a second insulating layer, and the second insulating layer covers the outer sidewall of the charging mechanism 3.
At least one layer of heat preservation layer is coated on the outer side of the feeding mechanism such as a feeder, so that the heat preservation effect on the powder material can be achieved, heat loss is prevented, the temperature of the powder material can be kept well all the time, the forming efficiency is improved, the forming pressure is reduced, and the Bs of the magnetic element obtained by forming are improved. The heat insulation material of the second heat insulation layer can be a light heat insulation material with a small heat conductivity coefficient, for example, the heat insulation material can be heat insulation cotton and the like, and the specific type of the heat insulation material is not limited in the embodiment of the application.
Specifically, the work flow of the powder pressing device may be as follows:
opening a press motor switch;
adding a powder material 9 such as iron-based soft magnetic composite powder into the feeding mechanism 1;
starting a first heating mechanism 71 arranged on the feeding mechanism 1 and a second heating mechanism 72 arranged on the forming mold 4, setting heating temperatures through a first temperature control part 712 and a second temperature control part 722, and starting a stirring mechanism 5 arranged on the feeding mechanism 1;
when the heating temperature rises to a set value, the heating mechanism automatically stops heating;
the temperature is maintained for about 10 minutes, and then the start press button is actuated to start press forming.
Wherein the first heating element 711 and the second heating element 721 may function to heat the powder material 9; the stirring mechanism 5 can play a role in enabling the temperature of the powder in the feeding mechanism 1 to be uniform; the heat insulation layers arranged on the connecting pipe 2 and the feeding mechanism 3 can play a role in keeping the temperature of the powder flowing in the forming process; in addition, the second heating element 721 may maintain the matrix 42 at the same temperature as the powder in the hopper. Therefore, the powder in the die cavity can be guaranteed to be at the same temperature all the time, and the practical effect of the powder feeding device is guaranteed to a great extent.
As can be seen from the above description, the powder pressing apparatus provided in the embodiments of the present application has the following main features: (1) the forming pressure is small: compared with cold press forming, the forming pressure of the device can be reduced by about 30% under the condition of obtaining the same density of blanks. (2) The forming efficiency is high: the device can achieve at least the same efficiency as conventional cold pressing. (3) The saturation magnetic flux density Bs of the magnetic element obtained by molding is high, and the strength is good; in addition, the mould is not fragile, and low in production cost etc. can reach the volume production level.
The embodiment of the application also provides a preparation system of the magnetic element, which comprises the powder pressing device.
Optionally, the preparation system of the magnetic element may further include a preparation device of the powder material, for preparing the powder material.
Optionally, the system for preparing a magnetic element may further include a removing device for removing the molded magnetic element from the pressing device, or a post-processing device for post-processing the molded magnetic element.
It should be noted that, in the embodiments of the present application, the illustrated composition or structure of the magnetic element manufacturing system does not constitute a specific limitation on the magnetic element manufacturing system. For example, the manufacturing system of the magnetic element includes a powder compacting device, and may further include other devices or apparatuses known in the art, such as a powder material manufacturing device.
The system for manufacturing a magnetic element according to the present invention has all the features and advantages of the aforementioned curved powder pressing device, and thus, the details thereof will not be repeated herein.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It is noted that a portion of this patent application contains material which is subject to copyright protection. The copyright owner reserves the copyright rights whatsoever, except for making copies of the patent files or recorded patent document contents of the patent office.
Claims (10)
1. A powder pressing device is characterized by comprising a feeding mechanism, a feeding mechanism and a forming die;
the feeding mechanism is used for feeding powder materials; the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, the feeding mechanism is used for injecting powder materials into the forming die, and the forming die is used for pressing the powder materials into elements;
wherein at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming die are provided with a heating mechanism and/or a heat preservation mechanism.
2. A powder pressing apparatus according to claim 1, wherein the heating mechanism includes a first heating mechanism provided in the feeding mechanism and a second heating mechanism provided in the molding die.
3. A powder compacting apparatus as defined in claim 2, wherein the feeding mechanism includes a hopper, and the first heating mechanism includes a first heating element and a first temperature control member;
the first temperature control component is used for monitoring the temperature of the powder material in the hopper, and the first heating element is arranged on the side wall of the hopper.
4. A powder compacting apparatus as defined in claim 3, further comprising an agitation mechanism, at least a part of which is disposed inside the hopper.
5. The powder pressing device according to claim 2, wherein the molding die includes an upper die, a female die, and a lower die, the female die is disposed below the upper die, the lower die is disposed below the female die, and the second heating mechanism includes a second heating element and a second temperature control member;
the second temperature control component is used for monitoring the temperature of the powder material in the forming die, and the second heating element is arranged on the side wall of the female die.
6. A powder pressing apparatus according to claim 1, wherein the heat insulating mechanism includes a first heat insulating mechanism provided to the connection pipe and a second heat insulating mechanism provided to the charging mechanism.
7. The powder pressing device according to claim 6, wherein the first heat insulating mechanism includes a first heat insulating layer that covers an outer periphery of the connection pipe.
8. A powder pressing device as claimed in claim 6, wherein the second heat insulating mechanism comprises a second heat insulating layer, and the second heat insulating layer is coated on an outer side wall of the charging mechanism.
9. The powder pressing device according to any one of claims 1 to 8, wherein the feeding mechanism and the molding die are provided with the heating mechanism;
the connecting pipe with reinforced mechanism all is provided with heat preservation mechanism.
10. A system for manufacturing a magnetic element, comprising the powder compacting apparatus according to any one of claims 1 to 9.
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| CN202010468917.XA CN111653418A (en) | 2020-05-28 | 2020-05-28 | Powder compression molding device and preparation system of magnetic element |
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| CN202010468917.XA CN111653418A (en) | 2020-05-28 | 2020-05-28 | Powder compression molding device and preparation system of magnetic element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346243A (en) * | 2021-12-27 | 2022-04-15 | 江西大有科技有限公司 | Iron-based magnetic powder forming process and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346243A (en) * | 2021-12-27 | 2022-04-15 | 江西大有科技有限公司 | Iron-based magnetic powder forming process and equipment |
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