CN117153509A - Processing method of grid type high-power metal resistor - Google Patents
Processing method of grid type high-power metal resistor Download PDFInfo
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- CN117153509A CN117153509A CN202311359354.0A CN202311359354A CN117153509A CN 117153509 A CN117153509 A CN 117153509A CN 202311359354 A CN202311359354 A CN 202311359354A CN 117153509 A CN117153509 A CN 117153509A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 194
- 239000002184 metal Substances 0.000 title claims abstract description 194
- 238000003672 processing method Methods 0.000 title abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 42
- 239000000395 magnesium oxide Substances 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 27
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 25
- 238000001816 cooling Methods 0.000 description 15
- 230000017525 heat dissipation Effects 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000004576 sand Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000000377 silicon dioxide Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
- H01C1/084—Cooling, heating or ventilating arrangements using self-cooling, e.g. fins, heat sinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Resistors (AREA)
Abstract
The invention relates to the technical fields of high-precision resistor, energy-saving heat exchange, energy-saving production process design and the like, and provides a processing method of a grid type high-power metal resistor.
Description
Technical Field
The invention relates to the technical fields of high-precision resistors, energy-saving heat exchange, industrial automatic control field requiring high heat dissipation for braking and starting, new energy battery pre-charging and discharging systems, energy-saving production process design and the like, in particular to a processing method of a grid type high-power metal resistor.
Background
High power metal resistors refer to resistors that can withstand high power without excessive heating. In the prior art, such resistors typically include a metal housing, a resistive sheet or strip, and an insulating substance. The resistor disc or the resistor strip wraps the insulating substance and is sealed in the metal shell, and the insulating substance is led out of the metal shell through the lead. The insulating substance generally includes silica sand, resin and industrial alcohol. Silica sand is filled into the metal shell, resin and industrial alcohol are injected into the metal shell for baking and fastening, part of fastened insulating substances are exposed at one end of the metal shell, and a wire is led out of the metal shell from the exposed end of the metal shell. The metal shell is a cuboid shell generally, a large amount of heat generated during the working of the high-power metal resistor is conducted and radiated mainly through four surfaces of the metal shell, the radiating effect is poor, the high-power metal resistor is in a high-heat state for a long time, and the service life is reduced. Meanwhile, the resistance value of the high-power resistor formed by wrapping the resistor sheet or the resistor strip by the metal shell and the insulating substance is unique, and various resistance values cannot be provided for different high-power scenes. In addition, the insulating material of partial fastening exposes in the one end of metal casing, and shock resistance is low, makes the silica sand become flexible easily, produces even and falls husky phenomenon, reduces the inside heat conduction ability of high-power resistor metal casing, and then reduces high-power metal resistor's life. In addition, silica sand is filled into the metal shell, and then resin and industrial alcohol are injected for baking and fastening, so that more time and electric energy are generally consumed, the efficiency is low, and the energy conservation and the environmental protection are not facilitated. Moreover, the resin and the industrial alcohol belong to chemical raw materials and have great pollution.
In summary, the existing high-power metal resistor technology has the technical problems of low production efficiency, high energy consumption, high pollution, poor heat dissipation, single resistance value, shortened service life and the like.
Disclosure of Invention
The invention aims to at least solve the defects in the prior art to a certain extent, and provides a processing method of a grid type high-power metal resistor, which is used for improving the production efficiency of the high-power metal resistor, reducing the energy consumption and pollution, realizing high heat dissipation performance, reducing the heat load of a resistor core and prolonging the service life of the high-power metal resistor.
The invention provides a processing method of a grid type high-power metal resistor, which comprises the following steps:
controlling filling equipment to automatically fill magnesium oxide powder into a metal shell of a metal resistor core of a high-power metal resistor, so that the magnesium oxide powder fully wraps an internal resistor body assembled in the metal shell and then covers the metal shell;
controlling the metal shell after the shrinkage tube equipment shrinks the sealing cover to enable the metal shell to shrink inwards and reduce the inner diameter, so that the magnesia powder is compressed inside the metal shell to be fastened;
a grid type shell is formed by connecting a set number of radiating fins, and adjacent radiating fins are separated by a set interval distance, so that radiating surfaces of the radiating fins are exposed in the air to form a plurality of exposed radiating surfaces;
the metal resistor core after being fastened by the magnesia powder penetrates through the plurality of exposed radiating surfaces to be connected with the plurality of radiating fins so as to be arranged inside the grid-type shell.
Further, before the grille housing is formed by connecting a set number of cooling fins, the grille housing comprises: preparing a plurality of radiating fins, wherein each radiating fin of the plurality of radiating fins is provided with a connecting tooth piece, and the connecting tooth piece is used for connecting and reinforcing two adjacent radiating fins when the grid type shell is formed by connecting, and the set interval distance is formed.
Further, providing connection teeth on each of the plurality of fins, comprising: and connecting teeth are arranged on the edge side of the exposed radiating surface of each radiating fin.
Further, providing connection teeth on an edge side of the exposed radiating surface of each of the plurality of radiating fins, comprising: and connecting teeth are arranged on one edge side or a plurality of edge sides of the exposed radiating surface of each radiating fin.
Further, providing connection teeth on each of the plurality of fins, comprising: connection teeth are provided on a plurality of edge sides on one of the exposed radiating surfaces of each of the plurality of radiating fins.
Further, the exposed radiating surface is set to be a rectangular exposed radiating surface, and the connecting tooth piece is set at four edge sides on one radiating surface of the rectangular exposed radiating surface of the radiating piece.
Further, the plurality of fins includes an end fin including a first end fin and a second end fin; the first end of the metal resistor core is connected with the first end radiating fin, and the second end of the metal resistor core is connected with the second end radiating fin; and a lead is led out from the first end of the metal resistor core.
Further, the first end heat sink comprises a first mounting surface, and the first mounting surface is connected with the exposed heat radiating surface of the first end heat sink; the second end radiating fin comprises a second mounting surface, and the second mounting surface is connected with the exposed radiating surface of the second end radiating fin.
Further, the processing method of the grid type high-power metal resistor comprises the following steps: the metal shell is prepared into a cylindrical shape or a flat bar shape or a cuboid shape.
Further, the processing method of the grid type high-power metal resistor comprises the following steps: preparing 1 or N metal resistor cores, wherein N is a natural number greater than 1; after the N metal resistor cores are arranged in the grid-type shell, the lead-out wires of any M metal resistor cores in the N metal resistor cores are connected in series or in parallel according to the design requirement, so that the required resistance value is flexibly realized, or a plurality of independent resistor resistance values are realized, wherein M is a natural number less than or equal to N.
Compared with the prior art, the invention has the beneficial effects that:
the processing method of the grid type high-power metal resistor comprises the steps of automatically filling magnesia powder into a metal shell of a metal resistor core of the high-power metal resistor by controlling filling equipment, fully wrapping an internal resistor body assembled in the metal shell by the magnesia powder, then sealing the metal shell, controlling a shrinkage pipe equipment to shrink the metal shell after sealing the cover, enabling the metal shell to shrink inwards, reducing the inner diameter, enabling the magnesia powder to be compressed inside the metal shell to fasten the magnesia powder, connecting a plurality of radiating fins with a set number to form the grid type shell, enabling radiating surfaces of the radiating fins to be exposed in the air to form a plurality of exposed radiating surfaces, enabling the metal resistor core after fastening the magnesia powder to pass through the plurality of exposed radiating surfaces, the plurality of radiating fins are connected to be arranged inside the grid-type shell so as to obtain the grid-type high-power metal resistor, the production efficiency of the high-power metal resistor is improved, the energy consumption and pollution are reduced, meanwhile, as the adjacent radiating fins are separated by a set interval distance, the radiating surfaces of the plurality of radiating fins are exposed in the air to form a plurality of exposed radiating surfaces, the metal resistor core penetrates through the plurality of exposed radiating surfaces and is connected with the plurality of radiating fins, so that each radiating fin provides two exposed radiating surfaces, the plurality of radiating fins provide doubled exposed radiating surfaces, the air directly circulates on the surface of the metal resistor core and the exposed radiating surfaces, the radiating performance of the high-power metal resistor is greatly enhanced, the open high radiating effect is realized, the thermal load of the resistor core is reduced, the service life of the high-power metal resistor is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for manufacturing a grid-type high-power metal resistor according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a grid-type high power metal resistor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another embodiment of a grid-type high power metal resistor;
FIG. 4 is a schematic diagram of another embodiment of a grid-type high power metal resistor;
FIG. 5 is a schematic diagram of another embodiment of a grid-type high power metal resistor;
FIG. 6 is a schematic diagram of another embodiment of a grid-type high power metal resistor;
FIG. 7 is a schematic view of a metal resistor core with a flat bar shape or a rectangular parallelepiped shape in a grid-type high-power metal resistor according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a metal resistor core with a flat bar shape or a cuboid shape corresponding to a heat sink according to an embodiment of the present invention;
FIG. 9 is a schematic view of a metal resistor core in the shape of a flat bar or a rectangular parallelepiped according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a metal resistor core with a cylindrical shape corresponding to a heat sink according to an embodiment of the present invention;
fig. 11 is a schematic view of a cylindrical metal resistor core according to an embodiment of the present invention.
In the drawings, each reference numeral denotes:
1. a metal resistor core; 10. a first end of the metal resistor core; 11. a second end of the metal resistor core;
2. a grill type housing; 20. a heat sink; 200. a first end heat sink; 2000. a first mounting surface; 201. a second end fin; 2010. a second mounting surface; 21. connecting tooth plates;
3. and (5) conducting wires.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar methods or methods having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention, and all other embodiments, based on the embodiments of the present invention, which may be obtained by persons of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present invention.
Referring to fig. 1-11, the present embodiment provides a method for processing a grid-type high-power metal resistor, which includes the following steps:
s101, controlling filling equipment to automatically fill magnesium oxide powder into a metal shell of a metal resistor core of a high-power metal resistor, so that the magnesium oxide powder fully wraps an internal resistor body assembled in the metal shell and then covers the metal shell;
s102, controlling the shrinkage pipe equipment to shrink the metal shell after the sealing cover, so that the metal shell is shrunk inwards, the inner diameter is reduced, and the inside of the metal shell is used for compressing the magnesia powder to fasten the magnesia powder;
s103, connecting a set number of radiating fins to form a grid type shell, wherein adjacent radiating fins are separated by a set interval distance, so that radiating surfaces of the radiating fins are exposed in the air to form a plurality of exposed radiating surfaces;
s104, enabling the metal resistor core fastened by the magnesia powder to penetrate through the plurality of exposed radiating surfaces and connect the plurality of radiating fins so as to be installed inside the grid-type shell.
In the prior art, the production process of the high-power metal resistor mainly comprises the following steps: silica sand is filled into the metal shell, resin and industrial alcohol are injected into the metal shell for baking and fastening, so that part of fastened insulating substances are exposed at one end of the metal shell, and the lead 3 is led out of the metal shell from the exposed end of the metal shell, thereby obtaining the high-power metal resistor. Silica sand is filled into the metal shell, resin and industrial alcohol are injected for baking and fastening, more time and electric energy are generally consumed, the efficiency is low, and energy conservation and environmental protection are not facilitated. Moreover, the resin and the industrial alcohol belong to chemical raw materials and have great pollution.
In this embodiment, the filling device is controlled to automatically fill the magnesium oxide powder into the metal shell of the metal resistor core 1 of the high-power metal resistor, so that the magnesium oxide powder fully wraps the internal resistor body assembled in the metal shell, then the metal shell is sealed, the shrinking device is controlled to shrink the metal shell after the sealing cover is shrunk inwards, the inner diameter is reduced, the magnesium oxide powder is compressed in the metal shell so as to fasten the magnesium oxide powder, pollution caused by using resin and industrial alcohol is avoided, the preparation efficiency of the metal resistor core 1 is high, the energy consumption is low, and energy conservation and environmental protection are facilitated. In addition, after the magnesium oxide powder is subjected to the shrinkage tube process, the compactness is high, the heat conduction performance is good, and the heat conduction and heat dissipation of the internal resistor body assembled in the metal shell can be better carried out.
It should be noted that in the prior art, the metal shell is generally a cuboid shell, and a large amount of heat generated during the working of the high-power metal resistor is conducted and radiated mainly through four surfaces of the metal shell, so that air cannot enter the metal shell for circulation, the radiating surface is few, the radiating effect is poor, the high-power metal resistor is in a high-heat state for a long time, and the service life is reduced. Meanwhile, an internal resistor, such as a resistor sheet or a resistor strip, wrapped by a metal shell has unique resistance values, and cannot provide various resistance values for different high-power scenes. In addition, the mixture of the partly fastened silica sand, resin and industrial alcohol is exposed at one end of the metal shell, so that the shock resistance is low, the silica sand is easy to loosen, even the sand falling phenomenon is generated, the heat conduction capacity inside the metal shell of the high-power resistor is reduced, and the service life of the high-power metal resistor is further reduced.
In this embodiment, instead of adopting the closed metal shell solution in the prior art, a set number of cooling fins 20 are connected to form the grid-type housing 2, and the adjacent cooling fins 20 are spaced apart by a set distance, so that the cooling surfaces of the cooling fins 20 are exposed to the air to form a plurality of exposed cooling surfaces, and then the metal resistor core 1 is installed inside the grid-type housing 2 by penetrating through the plurality of exposed cooling surfaces to connect the cooling fins 20. In this way, each fin 20 provides two exposed radiating surfaces, the fins 20 provide multiple doubled exposed radiating surfaces, air directly circulates on the surface of the metal resistor core 1 and the exposed radiating surfaces, so that the radiating performance of the high-power metal resistor is greatly enhanced, the open high radiating effect is realized, the thermal load of the resistor core is reduced, and the service life of the high-power metal resistor is prolonged.
It should be noted that in the prior art, the closed metal shell scheme determines that one metal shell is used for manufacturing a high-power resistor, one end of the metal shell is exposed and is not in the grid-type shell, so that when the metal shell is vibrated or used for a long time, the internal insulating material is easy to loosen, the heat conducting performance of the filling fastener is reduced, and even the metal shell is connected with the internal metal resistor to generate a short circuit, for example, after the insulating material wrapped on the metal resistor such as a resistance wire is loosened and falls off, the metal shell is easy to contact with the external metal shell to generate the short circuit. In this embodiment, the inside of the metal casing tightly wraps the magnesia powder, and compresses the magnesia powder to fasten the insulation filler, thereby improving the compactness of the insulation filler, and the end cover of the metal casing seals the inside of the metal casing, and the metal casing is also in the grid casing 2, so that the shock resistance of the high-power metal resistor is integrally improved. The high-compactness magnesia powder enhances the heat conducting performance of the metal resistor core 1, and the anti-seismic protection and air internal circulation heat dissipation of the grid-type shell 2, so that the comprehensive heat dissipation performance of the high-power metal resistor is greatly enhanced, the heat load of the resistor core is reduced, and the service life of the high-power metal resistor is prolonged. And safety accidents such as short circuit and the like of the high-power metal resistor can be avoided.
The magnesium oxide powder is an insulating material with high heat conductivity.
It should be noted that, in this embodiment, since the closed metal shell scheme in the prior art is not adopted any more, and the grille type housing 2 is formed by connecting a set number of the plurality of cooling fins 20, the whole processing method of the grille type high-power metal resistor can integrally present different shapes and sizes according to the shapes and connection modes of the cooling fins 20, so as to adapt to different use scenarios. Illustratively, in the present embodiment, the whole of the processing method of the grid-type high-power metal resistor exhibits a rectangular parallelepiped shape as a whole.
In some preferred embodiments, the step of forming the grill type housing 2 using a set number of the plurality of heat sinks 20 may be preceded by the steps of: preparing a plurality of cooling fins 20, wherein a connecting tooth piece 21 is arranged on each cooling fin 20 in the plurality of cooling fins 20, and the connecting tooth piece 21 is used for connecting and reinforcing two adjacent cooling fins 20 when the grid-type shell 2 is formed by connecting, and the set interval distance is formed. Wherein, the step of providing the connection teeth 21 on each fin 20 of the plurality of fins 20 may include: connection fins 21 are provided on the edge side of the exposed radiating surface of each of the plurality of radiating fins 20. Providing the connection tab 21 on the edge side of the exposed radiating surface of each of the plurality of radiating fins 20 may include the steps of: connection fins 21 are provided on one or more edge sides of the exposed radiating surface of each of the plurality of radiating fins 20. The step of providing the connection teeth 21 on each of the plurality of fins 20 may include the steps of: connection fins 21 are provided on a plurality of edge sides on one of the exposed radiating surfaces of each of the plurality of radiating fins 20. In addition, the exposed heat radiating surface may be configured as a rectangular exposed heat radiating surface, and the connection tabs 21 may be disposed at four edge sides on one heat radiating surface of the rectangular exposed heat radiating surface of the heat radiating fin 20.
It should be noted that, each heat sink 20 is provided with a connecting tooth piece 21, and two adjacent heat sinks 20 are connected and reinforced by one connecting tooth piece 21 of the heat sink 20, and the set interval distance is spaced, so that the processing method of the grid type high-power metal resistor is stable in structure and controllable in heat dissipation. The connection and reinforcement of the connection teeth 21 of one fin 20 and the adjacent fin 20 may be by abutment, fastening, plugging, etc.
If the exposed heat dissipating surface is a rectangular exposed heat dissipating surface, it is described that the exposed heat dissipating surface has four sides, and at this time, the connection teeth 21 may be disposed on a plurality of edge sides of one heat dissipating surface of the heat dissipating fin 20, and the connection teeth 21 may be disposed on edge sides of each of the four sides of the rectangular exposed heat dissipating surface.
It should be noted that, the connection teeth 21 are disposed on the edge side of the exposed heat dissipation surface of the heat dissipation plate 20, so that a large area of the exposed heat dissipation surface is reserved for connecting and installing the metal resistor core 1, thereby realizing the effect that a plurality of metal resistor cores 1 penetrate through the exposed heat dissipation surface.
In some preferred embodiments, the plurality of fins 20 comprises a header fin 20, the header fin 20 comprising a first header fin 200 and a second header fin 201; the first end 10 of the metal resistor core is connected with the first end radiating fin 200, and the second end 11 of the metal resistor core is connected with the second end radiating fin 201; the first end 10 of the metal resistor core leads out the wire 3. Further, the first end heat sink 200 includes a first mounting surface 2000, and the first mounting surface 2000 is connected to an exposed heat dissipating surface of the first end heat sink 200; the second end fin 201 includes a second mounting surface 2010, and the second mounting surface 2010 is connected to an exposed heat dissipating surface of the second end fin 201.
The first mounting surface 2000 and the second mounting surface 2010 may provide mounting points for the entire method of manufacturing the grid-type high-power metal resistor. The angle at which the first mounting surface 2000 is connected to the exposed heat dissipating surface of the first header heat sink 200 may be 90 degrees, and the angle at which the second mounting surface 2010 is connected to the exposed heat dissipating surface of the second header heat sink 201 may be 90 degrees.
It should be noted that, the first end 10 of the metal resistor core leads out wires, so that when a plurality of first ends 10 of the metal resistor core are connected with the first end cooling fin 200, all the led out wires are on the same side, and the resistor core is connected in series or in parallel according to the design requirement, so as to obtain different resistance values and adapt to high power with different values.
In some preferred embodiments, the metal housing may be prepared in a cylindrical shape or a flat bar shape or a rectangular parallelepiped shape. In addition, 1 or N of the metal resistive cores 1, N being a natural number greater than 1, may be prepared; when the N metal resistor cores 1 are mounted inside the grid-type housing 2, the lead wires of any M metal resistor cores 1 in the N metal resistor cores 1 are connected in series or in parallel according to design requirements, so as to flexibly realize a required resistance value, or a plurality of independent resistor resistance values, wherein M is a natural number less than or equal to N.
It should be noted that in the prior art, the closed metal shell scheme determines that a metal shell is used for manufacturing a high-power resistor, and only one resistor value can be provided, so that the resistor is used for a fixed power occasion. In this embodiment, since any plurality of the metal resistor cores 1 may be installed inside the grid-type housing 2, when the N metal resistor cores 1 are installed inside the grid-type housing 2, the lead wires of any M of the N metal resistor cores 1 are connected in series or in parallel to the resistor cores according to the design requirement, so as to flexibly achieve the required resistance, or independent resistance values, where M is a natural number less than or equal to N, so that one grid-type high-power metal resistor may be used, and different resistance values may be obtained, and different power occasions may be adapted.
In some modified embodiments, when the N metal resistor cores 1 are mounted inside the grid-type housing 2, the connection length of the connection teeth 21 of each of the plurality of fins 20 is kept uniform, and the connection length decreases as the value of N in the N metal resistor cores 1 increases, so that the distance between adjacent fins 20 decreases.
In this embodiment, when the N metal resistor cores 1 are mounted inside the grid-type housing 2, the connection length of the connection teeth 21 of each fin 20 of the plurality of fins 20 is kept uniform, and the connection length decreases as the value of N in the N metal resistor cores 1 increases, so that the distance between adjacent fins 20 decreases, and when the overall volume of the grid-type high-power metal resistor is unchanged, the number of fins 20 increases, so that the number of exposed heat dissipation surfaces increases, to meet the heat dissipation requirement when the resistance value increases when more metal resistor cores 1 are connected in series and the power value tolerated by the grid-type high-power metal resistor increases. The metal resistor core can be arranged into a flat strip shape or a cuboid shape, or can be arranged into a cylinder shape.
The connection length of the connection teeth 21 of each fin 20 is kept uniform, so that the fins 20 can be collectively managed, and the desired fin 20 can be associated with the length of the connection teeth 21. In addition, the connecting length of the connecting teeth 21 of each radiating fin 20 is kept consistent, the grid type shell 2 is formed by assembling conveniently, and the structural stability is stronger.
The foregoing is a description of the embodiments of the present invention, and is not to be construed as limiting the invention, since modifications in the detailed description and the application scope will become apparent to those skilled in the art upon consideration of the teaching of the embodiments of the present invention.
Claims (10)
1. A method of processing a grid-type high power metal resistor, comprising:
controlling filling equipment to automatically fill magnesium oxide powder into a metal shell of a metal resistor core of a high-power metal resistor, so that the magnesium oxide powder fully wraps an internal resistor body assembled in the metal shell and then covers the metal shell;
controlling the metal shell after the shrinkage tube equipment shrinks the sealing cover to enable the metal shell to shrink inwards and reduce the inner diameter, so that the magnesia powder is compressed inside the metal shell to be fastened;
a grid type shell is formed by connecting a set number of radiating fins, and adjacent radiating fins are separated by a set interval distance, so that radiating surfaces of the radiating fins are exposed in the air to form a plurality of exposed radiating surfaces;
the metal resistor core after being fastened by the magnesia powder penetrates through the plurality of exposed radiating surfaces to be connected with the plurality of radiating fins so as to be arranged inside the grid-type shell.
2. The method of manufacturing a grid type high power metal resistor according to claim 1, wherein before the grid type housing is formed by connecting a predetermined number of heat sinks, the method comprises: preparing a plurality of radiating fins, wherein each radiating fin of the plurality of radiating fins is provided with a connecting tooth piece, and the connecting tooth piece is used for connecting and reinforcing two adjacent radiating fins when the grid type shell is formed by connecting, and the set interval distance is formed.
3. The method of manufacturing a grid type high power metal resistor according to claim 2, wherein the step of providing a connection tooth on each of the plurality of heat sinks includes: and connecting teeth are arranged on the edge side of the exposed radiating surface of each radiating fin.
4. A method of manufacturing a grid type high power metal resistor according to claim 3, wherein providing connection teeth on an edge side of the exposed radiating surface of each of the plurality of radiating fins comprises: and connecting teeth are arranged on one edge side or a plurality of edge sides of the exposed radiating surface of each radiating fin.
5. A method of manufacturing a grid type high power metal resistor according to claim 3, wherein providing connection teeth on each of the plurality of fins comprises: connection teeth are provided on a plurality of edge sides on one of the exposed radiating surfaces of each of the plurality of radiating fins.
6. The method of manufacturing a grid-type high power metal resistor of claim 5, comprising: the exposed radiating surface is set to be a rectangular exposed radiating surface, and the connecting tooth plates are arranged on four edge sides of one radiating surface of the rectangular exposed radiating surface of the radiating plate.
7. The method of manufacturing a grid-type high power metal resistor of claim 1, wherein the plurality of fins comprises end fins comprising a first end fin and a second end fin; the first end of the metal resistor core is connected with the first end radiating fin, and the second end of the metal resistor core is connected with the second end radiating fin; and a lead is led out from the first end of the metal resistor core.
8. The method of manufacturing a grid-type high power metal resistor of claim 7, wherein the first end heat sink includes a first mounting surface, the first mounting surface being coupled to a bare heat dissipating surface of the first end heat sink; the second end radiating fin comprises a second mounting surface, and the second mounting surface is connected with the exposed radiating surface of the second end radiating fin.
9. The method of manufacturing a grid type high power metal resistor according to any one of claims 1 to 8, wherein the metal case is prepared in a cylindrical shape or a flat bar shape or a rectangular parallelepiped shape.
10. A method of manufacturing a grid-type high power metal resistor as set forth in any one of claims 1-8, including: preparing 1 or N metal resistor cores, wherein N is a natural number greater than 1; after the N metal resistor cores are arranged in the grid-type shell, the lead-out wires of any M metal resistor cores in the N metal resistor cores are connected in series or in parallel according to the design requirement, so that the required resistance value is flexibly realized, or a plurality of independent resistor resistance values are realized, wherein M is a natural number less than or equal to N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311359354.0A CN117153509B (en) | 2023-10-18 | 2023-10-18 | Processing method of grid type high-power metal resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311359354.0A CN117153509B (en) | 2023-10-18 | 2023-10-18 | Processing method of grid type high-power metal resistor |
Publications (2)
| Publication Number | Publication Date |
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| CN117153509A true CN117153509A (en) | 2023-12-01 |
| CN117153509B CN117153509B (en) | 2024-04-26 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1036129A (en) * | 1962-05-31 | 1966-07-13 | Ass Elect Ind | Improvements in and relating to electrical resistors |
| US5304978A (en) * | 1992-08-10 | 1994-04-19 | Mosebach Manufacturing Company | Resistor grid assembly having "U" bend resistor elements |
| CN1536321A (en) * | 2003-04-11 | 2004-10-13 | 乐金电子(天津)电器有限公司 | Heat exchanger |
| CN203607174U (en) * | 2013-08-13 | 2014-05-21 | 咸阳汇立丰电子有限公司 | Reducing integrated metal shell large-power resistor |
| JP2017054961A (en) * | 2015-09-10 | 2017-03-16 | Koa株式会社 | Resistor |
| CN210200430U (en) * | 2019-08-09 | 2020-03-27 | 云和县宏峰模具厂 | Resistor for circuit protection |
| CN111048269A (en) * | 2019-12-30 | 2020-04-21 | 广东福德电子有限公司 | High-pressure water-cooling metal pipe resistor |
| CN111863360A (en) * | 2020-08-14 | 2020-10-30 | 苏州利昇达电子科技有限公司 | Precision resistor with strong heat dissipation performance and manufacturing method thereof |
-
2023
- 2023-10-18 CN CN202311359354.0A patent/CN117153509B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1036129A (en) * | 1962-05-31 | 1966-07-13 | Ass Elect Ind | Improvements in and relating to electrical resistors |
| US5304978A (en) * | 1992-08-10 | 1994-04-19 | Mosebach Manufacturing Company | Resistor grid assembly having "U" bend resistor elements |
| CN1536321A (en) * | 2003-04-11 | 2004-10-13 | 乐金电子(天津)电器有限公司 | Heat exchanger |
| CN203607174U (en) * | 2013-08-13 | 2014-05-21 | 咸阳汇立丰电子有限公司 | Reducing integrated metal shell large-power resistor |
| JP2017054961A (en) * | 2015-09-10 | 2017-03-16 | Koa株式会社 | Resistor |
| CN210200430U (en) * | 2019-08-09 | 2020-03-27 | 云和县宏峰模具厂 | Resistor for circuit protection |
| CN111048269A (en) * | 2019-12-30 | 2020-04-21 | 广东福德电子有限公司 | High-pressure water-cooling metal pipe resistor |
| CN111863360A (en) * | 2020-08-14 | 2020-10-30 | 苏州利昇达电子科技有限公司 | Precision resistor with strong heat dissipation performance and manufacturing method thereof |
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|---|---|
| CN117153509B (en) | 2024-04-26 |
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