CN110853908B - 5G special alloy inductance powder metallurgy secondary forming process - Google Patents
5G special alloy inductance powder metallurgy secondary forming process Download PDFInfo
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- CN110853908B CN110853908B CN201911116574.4A CN201911116574A CN110853908B CN 110853908 B CN110853908 B CN 110853908B CN 201911116574 A CN201911116574 A CN 201911116574A CN 110853908 B CN110853908 B CN 110853908B
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- 239000000956 alloy Substances 0.000 title claims abstract description 59
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 40
- 238000003825 pressing Methods 0.000 claims description 36
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 239000003208 petroleum Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 10
- 238000005520 cutting process Methods 0.000 description 12
- 238000000465 moulding Methods 0.000 description 10
- 238000003754 machining Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
-
- 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
-
- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- 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
Abstract
The invention belongs to the technical field of inductor manufacturing, and particularly relates to a 5G special alloy inductor powder metallurgy secondary forming process. In the manufacturing process of the inductance part, the inductance part is divided into the first inductance component and the second inductance component, and then the first inductance component and the second inductance component are pressed together to form the required inductance core body. In addition, the surface of the workpiece is not damaged in the whole process of the process, the integrity of the insulating layer on the surface of the alloy powder is kept, and subsequent insulating processing is not needed. The whole manufacturing process is simpler than the traditional process, and time and materials are saved.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of inductor manufacturing, and particularly relates to a 5G special alloy inductor powder metallurgy secondary forming process.
[ background of the invention ]
The existing alloy powder inductance element is manufactured by pressing alloy powder to form an inductance core body, and winding a wire on the inductance core body to form an inductance piece. Generally, the inductor core is made by pressing an inductor core preform with a uniform overall width, then performing a cutting process to annularly cut the middle of the preform, removing the excess portion 91, and forming a center pillar 92 in the middle of the preform, thereby forming the inductor core, as shown in fig. 1. Statistically, the material cut by the workpiece is up to 40% during the cutting process, so that the cutting material needs to be recycled in order to avoid wasting the material during the cutting process. And the insulating layer on the surface layer of the material is damaged during cutting, and the subsequent insulating treatment is carried out. Therefore, the conventional inductance core body machining process needs a cutting mode, so that the whole process is long in machining time, multiple in subsequent procedures and complex in machining, the forming efficiency is seriously influenced, and the loss of materials caused by cutting machining is serious.
[ summary of the invention ]
In order to solve the problem that the process is complicated due to the fact that the inductor core needs to be machined and formed through cutting after being pressed in the prior art, the invention provides a 5G special alloy inductor powder metallurgy secondary forming process.
The invention is realized by the following technical scheme:
the 5G special alloy inductance powder metallurgy secondary forming process comprises the following steps:
pressing an inductance first component, wherein the inductance first component comprises a pendulum part and at least one center pillar arranged at the lower end of the pendulum part, and adjusting the forming size of the center pillar on a first die in advance before pressing to enable the center pillar to have pressing allowance;
pressing an inductance second component, wherein the inductance second component at least comprises a second swing part;
the first inductance component and the second inductance component are pressed together to form an integrated inductance part, the second component is opposite to the end face of the center pillar before pressing, and the center pillar is compressed along the length direction in the pressing process.
In the 5G special alloy inductance powder metallurgy secondary forming process, the density of the center pillars in the inductance first component is less than that of the pendulum parts, and in the pressed inductor, the density of the center pillars is equal to that of the pendulum parts.
According to the 5G special alloy inductance powder metallurgy secondary forming process, in the inductance first component, the density of the center pillar is 4-5.5G/cm3The density of the pendulum part is 6.3-6.5 g/cm3。
According to the 5G special alloy inductance powder metallurgy secondary forming process, the number of the center posts of the first inductance component is 1, and the formed inductance part is an inductance part with an I-shaped section.
According to the 5G special alloy inductance powder metallurgy secondary forming process, the second inductance component further comprises a second center pillar arranged on the second swing part, and when the first inductance component and the second inductance component are mutually pressed, the end face of the second center pillar is opposite to the end face of the center pillar.
In the 5G special alloy inductor powder metallurgy secondary forming process, when the inductor first component is formed, the density of the formed pendulum part is adjusted by adjusting the height of the pendulum part forming die cavity, and the density of the center pillar is adjusted by adjusting the length of the center pillar forming die cavity.
According to the 5G special alloy inductance powder metallurgy secondary forming process, when the first inductance component and the second inductance component are mutually pressed, the unit pressure applied on the pendulum part by the press is 5-7T/cm2。
In the 5G special alloy inductance powder metallurgy secondary forming process, the adopted alloy powder is metal powder which mainly comprises Fe powder and contains Si and Cr.
In the 5G special alloy inductance powder metallurgy secondary forming process, the alloy powder further comprises a fourth first petroleum epoxy resin and a fourth first petroleum epoxy resin curing agent, and the content of the fourth first petroleum epoxy resin is 2%.
Compared with the prior art, the invention has the following advantages:
1. the invention provides a 5G special alloy inductance powder metallurgy secondary forming process, in the manufacturing process of an inductance part, the inductance part is divided into a first inductance component and a second inductance component, and then the first inductance component and the second inductance component are pressed together to form a required inductance core body. In addition, the surface of the workpiece is not damaged in the whole process of the process, the integrity of the insulating layer on the surface of the alloy powder is kept, and subsequent insulating processing is not needed. The whole manufacturing process is simpler than the traditional process, and time and materials are saved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a forming process of an inductor in the prior art;
FIG. 2 is a schematic view of a die for molding a first component of an inductor in the 5G special alloy inductor powder metallurgy secondary molding process;
fig. 3 to 6 are schematic structural views (different center pillar shapes) of the first inductance component or the second inductance component;
FIG. 7 is a schematic view of the press-molding of the present invention (the second member is I-shaped);
FIG. 8 is a second schematic view of the press-fit molding of the present invention (both the first member and the second member are T-shaped ST-piece pendulums);
FIG. 9 is a graph showing the particle distribution of the alloy powder of the present embodiment compared with that of a conventional alloy powder.
[ detailed description ] embodiments
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in 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 invention and are not intended to limit the invention.
The invention is realized by the following technical scheme:
as shown in fig. 2 to 8, the 5G dedicated alloy inductor powder metallurgy secondary forming process includes pressing alloy powder in a first mold to form an inductor first member 1, wherein the inductor first member 1 includes a pendulum portion 11 and at least one center pillar 12 disposed at a lower end of the pendulum portion 11, and adjusting a forming size of the center pillar 12 on the first mold in advance before pressing to make the center pillar 12 have a press fit allowance; pressing an inductance second member 2 in a second mold or a first mold, the inductance second member 2 including at least a second pendulum part 21; the first inductance component 1 and the second inductance component 2 are pressed together to form an integrated inductance part, the second component 2 is opposite to the end face of the center pillar 12 before pressing, and the center pillar 12 is compressed along the length direction in the pressing process. The invention provides a 5G special alloy inductance powder metallurgy secondary forming process, in the manufacturing process of an inductance part, the inductance part is divided into an inductance first member 1 and an inductance second member 2, and then the inductance first member 1 and the inductance second member 2 are pressed mutually to form a required inductance core body. In addition, the surface of the workpiece is not damaged in the whole process of the process, the integrity of the insulating layer on the surface of the alloy powder is kept, and subsequent insulating processing is not needed. The whole manufacturing process is simpler than the traditional process, and time and materials are saved.
When the secondary forming is carried out, namely the first inductance component 1 and the second inductance component 2 are pressed against each other, the length of the center pillar after pressing is fixed (namely the size of a final finished product), and the density of the center pillar after forming is finally controlled, so that when the reserved amount is set, the value of the reserved amount is obtained according to the density in a controllable range. Specific density requirements are detailed below.
In addition, the manufacturing method can be completed by only adopting the press, the workpiece does not need to be transferred between the press and the cutting machine, and the equipment cost of the cutting machine can be saved for the production side.
In addition, after the process is improved, the method can be applied to an automatic production line, the inductor first component 1 and the inductor second component 2 after automatic pressing are conveyed to the corresponding pressing jig through a mechanical hand, and the molding can be realized by pressing through a press. The whole process can be realized in a machining center, one-time multi-pressure and quick pressing can be realized through array type discharge, and compared with the traditional chip machining method that only one workpiece is subjected to chip cutting, the efficiency is greatly improved.
Further, in the inductance first member 1, the density of the center pillars 12 is smaller than the density of the pendulum part 11, and in the press-fit type inductance element, the density of the center pillars 12 is equal to the density of the pendulum part 11. The integral density of the alloy powder inductance part after being formed is generally fixed in a range, and the scheme reserves a space for increasing the deformation density of the alloy powder inductance part in the subsequent pressing process by reducing the density of the center column 12, so that the alloy powder inductance part can be connected with a second component through pressing and can reach the density required by a formed part after being pressed and formed.
Specifically, in the scheme, the density of the center pillar 12 is 4-5.5 g/cm3The density of the pendulum part 11 is 6.3-6.5 g/cm3. The density of the pendulum part 11 was not changed after the manufacture and during the subsequent molding, and the applicant controlled the density of the center pillar 12 to 4g/cm through the test3To 5.5g/cm3During the second pressing, the density of the formed part can be controlled to be increased to 6.3g/cm close to the pendulum part after the center pillar 12 is pressed to the length of the formed part3To 6.5g/cm3In the meantime. If it is less than 4g/cm3In the first compression molding, the problems of corner collapse and powder falling of the appearance are easily caused, so that the component is damaged, and the secondary compression molding cannot be completed. If the density is higher than 5.5g/cm3As described above, the problem of cracks and the like is likely to occur in the first press molding or the second press molding.
Still further, in this aspect, the shape of the workpiece is particularly directed to an inductance component having an i-shaped cross section. Wherein the number of the columns is 1. The inductance core body with the shape is widely used and cannot be formed and processed at one time, so that the processing process of the inductance core body with the shape generally adopts the traditional processing technology of firstly pressing and then cutting. In this embodiment, the shape of the center pillar of the first inductance member 1 or the second inductance member 2 is not limited to a cylindrical shape, and as shown in fig. 3 to 6, the center pillar 12 may be a cylindrical shape, an oval shape, a polygonal shape, or a combined figure having a basic pattern, which only needs to satisfy the condition that the maximum width is smaller than the width of the pendulum part. The pendulum part 11 may have various shapes.
As shown in fig. 7, the first inductance member 1 with t-shaped ST-piece pendulum part can be prefabricated in this solution, and is pressed together with the second I-type inductance member 2. After pressing, the jig is disassembled from two sides, and the inductor can be obtained.
As shown in fig. 8, the second inductance member 2 may be a t-shaped ST piece pendulum portion in the present embodiment. Specifically, the second inductance member 2 further includes a second center pillar 21 provided on the second pendulum part 21, and when the first inductance member 1 and the second inductance member 2 are pressed against each other, an end surface of the second center pillar 21 faces an end surface of the center pillar 12. When the first inductance component 1 and the second inductance component 2 are both T-shaped ST piece pendulums, the first inductance component 1 and the second inductance component 2 in the same shape can be extruded by the same set of die, so that the manufacture is simpler.
In the forming process of fig. 7 and 8, a press is used to simultaneously press the first inductance component 1 and the second inductance component 2 on the upper and lower sides. Of course, the first inductance component 1 or the second inductance component 2 can be pressed into the other fixed component from one side, and the pressing can be completed to obtain the finished product.
In this embodiment, when the inductance first member 1 is molded, the density of the molded pendulum part is adjusted by adjusting the height of the molding cavity of the pendulum part 11, and the density of the center pillar is adjusted by adjusting the length of the molding cavity of the center pillar 12. The mould is specifically shown in fig. 2, the height of the pendulum part forming cavity is adjusted through the first adjusting piece 81, so that the thickness of the pendulum part 11 is changed, and the density of the pendulum part 11 after being pressed is adjusted. Similarly, the density of the molded center pillar 12 is adjusted by the second adjusting member 82 in the middle. Can realize the control of density in the equal amount alloy powder pressfitting process to reserve out the pressfitting surplus on center pillar 12, be convenient for secondary pressfitting. Since the final forming dimension of the product is set, and the final density parameter and the final weight are set as required, when calculating the pressing allowance, the length of the center pillar in the first forming can be obtained according to the predetermined density (4-5.5) and the cross-sectional area of the center pillar (generally determined by the specification of the product), that is, the position of the center pillar can be set by the second adjusting member 82. The thickness of the pendulum part is set in the same way.
When the first inductance member 1 and the second inductance member 2 are pressed against each other, the unit pressure applied to the pendulum part 11 by the press is 5 to 7T/cm2. The pendulum 11 may be designed in different shapes, resulting in different sizes. After many times of experiments, the density required by the scheme can be obtained by applying the unit pressure, so that the adjustment can be carried out only according to the pressing surface area of the pendulum part. And the pressing speed of the press is controlled to be 8-10 RPM, so that the product is formed.
In the scheme, the adopted alloy powder is metal powder which mainly comprises Fe powder and contains Si and Cr. For example, Fe90Si5-6Cr4-5 alloy is used as a main material, and certain resin and curing agent are doped to obtain the alloy powder performance required by the scheme for pressing. Specifically, the alloy powder further comprises a fourth first petroleum epoxy resin and a fourth first petroleum epoxy resin curing agent, and the content of the fourth first petroleum epoxy resin is 2%.
The distribution table of the alloy powder particles after doping in the scheme is as follows
BD in the above table is the bulk density of the alloy powder
And the analysis and comparison are combined with fig. 9, wherein 71 is a broken line of the particle distribution of the alloy powder in the scheme, 72 is a broken line of the particle distribution of the common alloy powder on the market, and the abscissa is the mesh number and the ordinate is the weight. Compared with the alloy powder on the market, the proportion of the alloy powder adopted by the scheme is more than 400 meshes (the weight is higher than 160, and the proportion of the common alloy powder is lower than 140), the proportion of fine particles of the alloy powder is higher, and the proportion of the particles with 140 meshes is lower than twice of that of the existing alloy powder. And the moisture content meets the requirements of the manufacturing process of the powder metallurgy of the inductor. The performance of the alloy powder is far superior to that of common alloy powder in the current market, so that the manufactured inductance part or component is not easy to have the problems of corner breakage, powder falling, cracks and the like.
The invention provides a 5G special alloy inductance powder metallurgy secondary forming process, in the manufacturing process of an inductance part, the inductance part is divided into an inductance first member 1 and an inductance second member 2, and then the inductance first member 1 and the inductance second member 2 are pressed mutually to form a required inductance core body. In addition, the surface of the workpiece is not damaged in the whole process of the process, the integrity of the insulating layer on the surface of the alloy powder is kept, and subsequent insulating processing is not needed. The whole manufacturing process is simpler than the traditional process, and time and materials are saved.
The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the practice of the invention to the particular forms disclosed. Similar or identical methods, structures and the like, or several technical deductions or substitutions on the premise of the conception of the invention, are considered to be the protection scope of the invention.
Claims (7)
1.5G special alloy inductance powder metallurgy secondary forming process, which is characterized by comprising the following steps:
pressing the alloy powder into an inductance first component (1) in a first die, wherein the inductance first component (1) comprises a pendulum part (11) and at least one center pillar (12) arranged at the lower end of the pendulum part (11), and adjusting the forming size of the center pillar (12) on the first die in advance before pressing to enable the center pillar (12) to have pressing allowance;
-pressing an inductive second component (2) in a second mould or in a first mould, the inductive second component (2) comprising at least a second pendulum (21);
placing the first inductance component (1) and the second inductance component (2) in a pressing mould for mutual pressing to form an integrated inductance part, wherein the second component (2) is opposite to the end face of the center pillar (12) before pressing, and the center pillar (12) is compressed along the length direction in the pressing process;
the density of center pillars (12) of the inductance first component (1) is smaller than that of the pendulum part (11), and in the laminated inductor, the density of the center pillars (12) is equal to that of the pendulum part (11);
in the first inductance component (1), the density of the center pillar (12) is 4-5.5 g/cm3The density of the pendulum part (11) is 6.3-6.5 g/cm3。
2. The 5G special alloy inductance powder metallurgy secondary forming process according to claim 1, wherein the number of the center pillars of the inductance first member (1) is 1, and the formed inductance part is an inductance part with an I-shaped section.
3. The 5G special alloy inductance powder metallurgy secondary forming process according to claim 1, wherein the inductance second component (2) further comprises a second central pillar (21) arranged on the second swing portion (21), and when the inductance first component (1) and the inductance second component (2) are pressed against each other, an end face of the second central pillar (21) is opposite to an end face of the central pillar (12).
4. The 5G special alloy inductance powder metallurgy secondary forming process is characterized in that when the inductance first component (1) is formed, the density of the formed pendulum part is adjusted by adjusting the height of the pendulum part forming die cavity, and the density of the center pillar is adjusted by adjusting the length of the center pillar forming die cavity.
5. The 5G special alloy inductance powder metallurgy secondary forming process according to claim 1, wherein when the inductance first member (1) and the inductance second member (2) are mutually pressed, the unit pressure exerted on the pendulum part by a press is 5-7T/cm2。
6. The 5G special alloy inductance powder metallurgy secondary forming process according to claim 1, wherein the adopted alloy powder is metal powder which is mainly Fe powder and contains Si and Cr.
7. The 5G special alloy inductance powder metallurgy secondary forming process according to claim 6, wherein the alloy powder further comprises a fourth type first petroleum epoxy resin and a fourth type first petroleum epoxy resin curing agent, and the content of the fourth type first petroleum epoxy resin is 2%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04286305A (en) * | 1991-03-15 | 1992-10-12 | Tokin Corp | Inductor and manufacture thereof |
| CN2710117Y (en) * | 2004-03-19 | 2005-07-13 | 郑长茂 | Inductor |
| CN2726077Y (en) * | 2004-07-02 | 2005-09-14 | 郑长茂 | Inductor |
| CN101645342A (en) * | 2008-08-08 | 2010-02-10 | 郑长茂 | Inductor and molding method thereof |
| CN108097973A (en) * | 2017-12-29 | 2018-06-01 | 合肥波林新材料股份有限公司 | A kind of sintered powder material preparation method |
-
2019
- 2019-11-15 CN CN201911116574.4A patent/CN110853908B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04286305A (en) * | 1991-03-15 | 1992-10-12 | Tokin Corp | Inductor and manufacture thereof |
| CN2710117Y (en) * | 2004-03-19 | 2005-07-13 | 郑长茂 | Inductor |
| CN2726077Y (en) * | 2004-07-02 | 2005-09-14 | 郑长茂 | Inductor |
| CN101645342A (en) * | 2008-08-08 | 2010-02-10 | 郑长茂 | Inductor and molding method thereof |
| CN108097973A (en) * | 2017-12-29 | 2018-06-01 | 合肥波林新材料股份有限公司 | A kind of sintered powder material preparation method |
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