CN113000617A - Cable cladding layer thickness design method and aluminum-clad steel wire aluminum layer thickness design method - Google Patents
Cable cladding layer thickness design method and aluminum-clad steel wire aluminum layer thickness design method Download PDFInfo
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- CN113000617A CN113000617A CN202110095375.0A CN202110095375A CN113000617A CN 113000617 A CN113000617 A CN 113000617A CN 202110095375 A CN202110095375 A CN 202110095375A CN 113000617 A CN113000617 A CN 113000617A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 71
- 239000010959 steel Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000005253 cladding Methods 0.000 title claims abstract description 50
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000013461 design Methods 0.000 title claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 53
- 238000000576 coating method Methods 0.000 claims abstract description 53
- 239000010410 layer Substances 0.000 claims abstract description 44
- 239000011247 coating layer Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000004513 sizing Methods 0.000 claims description 34
- 238000012937 correction Methods 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 27
- 238000012360 testing method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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Abstract
The invention relates to the technical field of aluminum-clad steel wire structure design, in particular to a cable cladding layer thickness design method and an aluminum-clad steel wire aluminum layer thickness design method. The design method for the average thickness of the coating layer of the coated cable provided with the metal coating layer disclosed by the invention theoretically provides a design value of the thickness of the coating layer, can achieve the purpose that the coated cable reaches and exceeds the national (industrial) standard after being drawn from a coating rod, and improves the production quality of the coated cable. Particularly, in the production of the aluminum-clad steel wire, the average aluminum layer thickness of the aluminum-clad steel wire is obtained after drawing through the design calculation of the cladding rod, so that the production quality of the aluminum-clad steel wire can be improved.
Description
Technical Field
The invention relates to the technical field of aluminum-clad steel wire structure design, in particular to a cable cladding layer thickness design method and an aluminum-clad steel wire aluminum layer thickness design method.
Background
At present, the national standard GB/T17937-2009 only provides a numerical value for the average aluminum layer thickness and does not serve as a mandatory technical index requirement. The thickness of a coating layer of a domestic metal-coated cable cannot meet the standard regulation, particularly the average thickness of aluminum-coated steel wires cannot meet the indexes of the national standard and the standard regulation of national power grid enterprises, and the aluminum-coated steel industry is not paid attention to. The current industry designs the diameters of the clad rod and the steel core only from the consideration of electric conductivity, and the design mode has the following defects: the conductivity is met but the requirement for average aluminum layer thickness is not met.
Therefore, there is still a room for improvement in the structure of the clad cable and the structure design of the aluminum-clad steel wire, and it is necessary to optimize and improve the room, and a reasonable technical scheme is proposed to solve the current technical problems.
Disclosure of Invention
In order to overcome the defects of the prior art mentioned in the above, the invention provides a cable cladding layer thickness design method and an aluminum-clad steel wire aluminum layer thickness design method, aiming at determining the diameter of a required cladding bar and the diameter of a steel core according to the fluid deformation of a cladding layer and a wire core of a metal cable, in particular the fluid deformation principle of aluminum-clad steel wires in the cladding and drawing processes, starting from the requirement of meeting the average aluminum layer thickness, and according to aluminum-clad steel wires with different electric conductivities and different diameters.
In order to achieve the purpose, the invention specifically adopts the technical scheme that:
the cable coating layer thickness design method is applied to a cable provided with a metal coating layer, the cable is obtained by drawing a coating rod, and the average thickness of the cable coating layer is determined by the following method:
wherein d is0Is the diameter of the core of the clad rod, D is the diameter of the clad rod, D1To coat the diameter of the core of the cable, dasS is the average thickness of the cladding in the coated cable, for the diameter of the coated cable.
The method is applied to the coated cable, mainly aims at the cable provided with the metal coating layer, and particularly aims at the cable with the steel core as the core, and obtains the theoretical value of the thickness of the coating layer in the coated cable through the equation reasoning by utilizing the principle that the steel ratio in the coating rod is equal to the steel ratio in the coated cable so as to be used as the reference for setting the average thickness of the coating layer.
Further, the clad cable is obtained after the clad rod disclosed by the invention is drawn, the influence on the thickness of the clad layer caused by various factors in the drawing process is considered, and the set parameters during the manufacturing of the clad rod are optimized, so that the following concrete feasible schemes are provided: the cladding rod is manufactured through a cladding sizing die, and the diameter of the die of the cladding sizing die is larger than that of the cladding rod. When the scheme is adopted, the diameter of the coating rod during production is larger than the theoretical diameter, and after the coating rod is pulled, the average thickness of the coating layer of the coated cable obtained by pulling the coating rod is larger than a standard specified value.
Further, the coating sizing die disclosed by the invention is used for manufacturing a coating rod, the coating rod forms the coated cable after being drawn, and the thickness of a coating layer of the coated cable manufactured by drawing according to a process can meet the requirement after the size of the coating rod meets the requirement, so that the size of the coating rod is optimized, particularly the size of the die for manufacturing the coating rod is optimized, and the following feasible scheme is provided, and the diameter of the die of the coating sizing die is determined according to the following method:
wherein d' is the diameter of the die of the cladding sizing die, k is a correction factor and k belongs to [1.013,1.02 ].
Further, the diameter of the coating sizing die is adjusted through the correction coefficient, the selection mode of the correction coefficient can be limited, specifically, the value of the correction coefficient k is selected according to the conductivity of the coated cable, and the k value selected along with the increase of the conductivity is increased.
The invention also discloses a method for designing the average aluminum layer thickness of the aluminum-clad steel wire, which comprises the following steps:
the design method of the average thickness of the aluminum layer of the aluminum-clad steel wire is applied to the aluminum-clad steel wire, and the average thickness of the aluminum layer in the aluminum-clad steel wire is determined according to the following method:
wherein d is0Is the diameter of the core of the clad rod, D is the diameter of the clad rod, D2Is the diameter of the core of the aluminum-clad steel wire, daaIs the diameter of the aluminum-clad steel wire and l is the average thickness of the aluminum layer in the aluminum-clad steel wire.
Similarly, the design method utilizes the principle that the steel ratio in the clad rod is equal to the steel ratio in the aluminum-clad steel wire, and the theoretical value of the thickness of the clad layer in the aluminum-clad steel wire can be obtained through the equation by inference, so that the theoretical value is used as a reference for setting the average thickness of the aluminum layer.
Still further, the coated cable is obtained after the coating rod disclosed by the invention is drawn, the influence on the thickness of the coating layer caused by various factors in the drawing process is considered, and the set parameters during the manufacturing of the coating rod are optimized, so as to give the following concrete feasible schemes: the cladding rod is manufactured through a cladding sizing die, and the diameter of the die of the cladding sizing die is larger than that of the cladding rod. When the scheme is adopted, the diameter of the cladding rod during production is larger than the theoretical diameter, and after drawing, the average thickness of the aluminum layer of the aluminum-clad steel wire obtained by drawing the cladding rod is larger than a standard specified value.
Further, the coating sizing die disclosed by the invention is used for manufacturing a coating rod, the coating rod forms the coating cable after being drawn, and after the size of the coating rod meets the requirement, the average thickness of the aluminum layer of the aluminum-coated steel wire manufactured by drawing according to the process can meet the requirement, so that the size of the coating rod is optimized, particularly the size of the die for manufacturing the coating rod is optimized, the following feasible scheme is provided, and the diameter of the die of the coating sizing die is determined according to the following method:
wherein d' is the diameter of the die of the cladding sizing die, k is a correction factor and k belongs to [1.013,1.02 ].
Further, the diameter of the cladding sizing die is adjusted through the correction coefficient, the selection mode of the correction coefficient can be limited, specifically, the value of the correction coefficient k is selected according to the electric conductivity of the aluminum-clad steel wire, and the selected k value is increased along with the increase of the electric conductivity.
Compared with the prior art, the invention has the beneficial effects that:
the design is carried out aiming at the thickness of the coating layer of the coated cable provided with the metal coating layer, the design value of the thickness of the coating layer is theoretically provided, the coated cable can reach and exceed the national (industrial) standard after being drawn from the coating rod, and the production quality of the coated cable is improved. Particularly, in the production of the aluminum-clad steel wire, the average thickness of the aluminum layer of the aluminum-clad steel wire is obtained by drawing according to the clad rod at the design position, so that the production quality of the aluminum-clad steel wire can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic cross-sectional view of a clad rod.
Fig. 2 is a cross-sectional schematic view of a coated cable.
Fig. 3 is a schematic cross-sectional view of an aluminum-clad steel wire.
Detailed Description
The invention is further explained below with reference to the drawings and the specific embodiments.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
Example 1
Aiming at the current situation that the average thickness of a coating layer of the existing coated cable provided with a metal coating layer cannot reach the specified value of the national (industrial) standard, the embodiment provides a design method, the thickness of the coating layer of the coated cable is designed, the thickness of the coating layer is theoretically specified, the production quality of the coated cable is improved in actual production, and the specification of the national (industrial) standard is reached.
Specifically, as shown in fig. 1 and fig. 2, the technical solution disclosed in this embodiment is as follows:
the cable coating layer thickness design method is applied to a cable provided with a metal coating layer, the cable is obtained by drawing a coating rod, and the average thickness of the cable coating layer is determined by the following method:
wherein d is0Is the diameter of the core of the clad rod, D is the diameter of the clad rod, D1To coat the diameter of the core of the cable, dasS is the average thickness of the cladding in the coated cable, for the diameter of the coated cable.
The method is applied to the coated cable, mainly aims at the cable provided with the metal coating layer, and particularly aims at the cable with the steel core as the core, and obtains the theoretical value of the thickness of the coating layer in the coated cable through the equation reasoning by utilizing the principle that the steel ratio in the coating rod is equal to the steel ratio in the coated cable so as to be used as the reference for setting the average thickness of the coating layer.
The clad cable is obtained after the clad rod disclosed in the embodiment is drawn, the influence on the thickness of the clad layer caused by various factors in the drawing process is considered, and the set parameters during the manufacture of the clad rod are optimized, so that the following specific feasible schemes are provided: the cladding rod is manufactured through a cladding sizing die, and the diameter of the die of the cladding sizing die is larger than that of the cladding rod. When the scheme is adopted, the diameter of the coating rod during production is larger than the theoretical diameter, and after the coating rod is pulled, the average thickness of the coating layer of the coated cable obtained by pulling the coating rod is larger than a standard specified value.
The coating sizing die disclosed in the embodiment is used for manufacturing a coating rod, the coating rod forms the coated cable after being drawn, and after the size of the coating rod meets the requirement, the thickness of a coating layer of the coated cable manufactured by drawing according to a process can meet the requirement, so that the size of the coating rod is optimized, particularly the size of the die for manufacturing the coating rod is optimized, the following feasible scheme is given, and the diameter of the die of the coating sizing die is determined according to the following method:
wherein d' is the diameter of the die of the cladding sizing die, k is a correction factor and k belongs to [1.013,1.02 ].
The coating sizing die is adjusted through the correction coefficient, the selection mode of the correction coefficient can be limited, specifically, the value of the correction coefficient k is selected according to the conductivity of the coated cable, and the value of the k selected along with the increase of the conductivity is increased.
Example 2
The content of the above example 1 discloses a method for designing the thickness of the clad layer of the clad wire, and the present example also specifically discloses a method for designing the average aluminum layer thickness of the aluminum-clad steel wire, specifically as follows:
as shown in fig. 1 and 3, the average aluminum layer thickness design method for aluminum-clad steel wires is applied to aluminum-clad steel wires, and the average thickness of the aluminum layer in the aluminum-clad steel wires is determined according to the following method:
wherein d is0Is the diameter of the core of the clad rod, D is the diameter of the clad rod, D2Is the diameter of the core of the aluminum-clad steel wire, daaIs the diameter of the aluminum-clad steel wire and l is the average thickness of the aluminum layer in the aluminum-clad steel wire.
Similarly, the design method utilizes the principle that the steel ratio in the clad rod is equal to the steel ratio in the aluminum-clad steel wire, and the theoretical value of the thickness of the clad layer in the aluminum-clad steel wire can be obtained through the equation by inference, so that the theoretical value is used as a reference for setting the average thickness of the aluminum layer.
The clad cable is obtained after the clad rod disclosed in the embodiment is drawn, the influence on the thickness of the clad layer caused by various factors in the drawing process is considered, and the set parameters during the manufacture of the clad rod are optimized, so that the following specific feasible schemes are provided: the cladding rod is manufactured through a cladding sizing die, and the diameter of the die of the cladding sizing die is larger than that of the cladding rod. When the scheme is adopted, the diameter of the cladding rod during production is larger than the theoretical diameter, and after drawing, the average thickness of the aluminum layer of the aluminum-clad steel wire obtained by drawing the cladding rod is larger than a standard specified value.
The coating sizing die disclosed in the embodiment is used for manufacturing a coating rod, the coating rod forms the coating cable after being drawn, and after the size of the coating rod meets the requirement, the average thickness of the aluminum layer of the aluminum-coated steel wire manufactured by drawing according to the process can meet the requirement, so that the size of the coating rod is optimized, particularly the size of the die for manufacturing the coating rod is optimized, the following feasible scheme is provided, and the diameter of the die of the coating sizing die is determined according to the following method:
wherein d' is the diameter of the die of the cladding sizing die, k is a correction factor and k belongs to [1.013,1.02 ].
The selection mode of the correction coefficient can be limited by adjusting the coating sizing die through the correction coefficient, specifically, the value of the correction coefficient k is selected according to the electric conductivity of the aluminum-clad steel wire, and the value of the k selected along with the increase of the electric conductivity is increased.
According to the method for designing the average thickness of the aluminum-clad steel wire aluminum layer disclosed in this embodiment, this embodiment provides part of the test data for verification.
First, tests were performed using several aluminum-clad steel wires of different conductivity as in table 1 below.
TABLE 1
The specific test contents are as follows:
the electric conductivity is 20AC, the diameter phi of the aluminum clad steel wire is 3.80mm, the diameter phi of the clad rod is 6.56mm, the diameter phi of the clad sizing die is 6.56mm, and according to the production test, the diameter phi of the clad rod is 6.50mm, the detected average aluminum layer thickness after drawing the phi 3.80 aluminum clad steel wire is 0.240mm, and the average aluminum layer thickness cannot reach 0.255mm specified by the standard. After several times of tests, the diameter of the cladding sizing die is adjusted to be phi 6.65mm through a correction coefficient, the diameter of the cladding rod reaches phi 6.59mm, the average aluminum layer thickness is detected to be 0.262mm after the cladding rod is drawn to be phi 3.80 aluminum-clad steel wire, the average aluminum layer thickness is 2.75% higher than the specified value of the national standard and the national power grid enterprise standard, and the requirements are met.
In this way, seven other aluminum-clad steel wires with the conductivity in the table I are tested to obtain the data in the table II.
Therefore, by the design method disclosed in the embodiment, the standard reaching rate of the average thickness of the aluminum layer in the aluminum-clad steel wire production process is greatly improved, and the production quality of the aluminum-clad steel wire is improved.
The present invention is not limited to the above-described alternative embodiments, and various other embodiments can be obtained by those skilled in the art from the above-described embodiments in any combination, and any other embodiments can be obtained in various forms while still being within the spirit of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (8)
1. The cable coating layer thickness design method is applied to a cable provided with a metal coating layer, the cable is obtained by drawing a coating rod, and the method is characterized in that the average thickness of the cable coating layer is determined by the following method:
wherein d is0Is the diameter of the core of the clad rod, D is the diameter of the clad rod, D1To determine the diameter of the core of the coated cable, das is the diameter of the coated cable and s is the average thickness of the coating in the coated cable.
2. The cable coating thickness design method of claim 1, wherein: the cladding rod is manufactured through a cladding sizing die, and the diameter of the die of the cladding sizing die is larger than that of the cladding rod.
3. The cable coating thickness design method of claim 2, wherein the die diameter of the coating sizing die is determined as follows:
wherein d' is the diameter of the die of the cladding sizing die, k is a correction factor and k belongs to [1.013,1.02 ].
4. The cable coating thickness design method of claim 3, wherein: the value of the correction factor k is chosen according to the conductivity of the coated cable, and the value of k chosen increases as the conductivity increases.
5. The design method of the average aluminum layer thickness of the aluminum-clad steel wire is applied to the aluminum-clad steel wire and is characterized in that the average thickness of the aluminum layer in the aluminum-clad steel wire is determined according to the following method:
wherein d is0Is the diameter of the core of the clad rod, D is the diameter of the clad rod, D2Is the diameter of the core of the aluminum-clad steel wire, daa is the diameter of the aluminum-clad steel wire, and l is the average thickness of the aluminum layer in the aluminum-clad steel wire.
6. The method of claim 5, wherein the method comprises the steps of: the cladding rod is manufactured through a cladding sizing die, and the diameter of the die of the cladding sizing die is larger than that of the cladding rod.
7. The method for designing the average aluminum layer thickness of the aluminum-clad steel wire as recited in claim 6, wherein the die diameter of the cladding sizing die is determined as follows:
wherein d' is the diameter of the die of the cladding sizing die, k is a correction factor and k belongs to [1.013,1.02 ].
8. The method as claimed in claim 7, wherein the value of the correction coefficient k is selected according to the conductivity of the aluminum-clad steel wire, and the value of k is increased as the conductivity increases.
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