CN111940536A - Method for manufacturing aluminum-coated invar wire - Google Patents
Method for manufacturing aluminum-coated invar wire Download PDFInfo
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- CN111940536A CN111940536A CN202010721088.1A CN202010721088A CN111940536A CN 111940536 A CN111940536 A CN 111940536A CN 202010721088 A CN202010721088 A CN 202010721088A CN 111940536 A CN111940536 A CN 111940536A
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- invar
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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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/042—Manufacture of coated wire or bars
Abstract
The invention provides a manufacturing method of an aluminum-coated invar wire, which comprises the following steps of (1) heating an invar wire to 280-300 ℃; (2) detecting the temperature of the heated invar steel wires by using white paper; (3) the heated invar steel wires are combined with the pure aluminum in a semi-molten state to form the aluminum-coated invar steel rod. The problem that the steel wire cannot reach the ideal preheating temperature and the surface of the invar steel cannot be continuously wrapped with the aluminum layer only by heating the invar steel through the intermediate frequency furnace is solved by adding the high-frequency furnace. The method for judging the temperature of the white paper color solves the problem that the temperature cannot be monitored and judged due to high-speed movement and shaking in the invar steel coating process. The manufacturing mode that the specific invar specification is heated according to specific power parameters ensures the repeated stable production of the aluminum-clad invar process. The cladding of the invar steel wrapped by the aluminum is similar to that of the steel wrapped by the aluminum, and only a high-frequency furnace heating device is needed to be added behind the intermediate-frequency furnace, so that the improvement is simple.
Description
Technical Field
The invention relates to the field of cables and wires, in particular to a method for manufacturing an aluminum-coated invar wire.
Background
At present, in an overhead power transmission system in China, an aluminum-clad steel wire for an aluminum-clad steel core electrician is mostly adopted as a preferred material of OPGW and a key reinforcing core of a lead, and plays a vital role in bearing. With the increasing demand of China on electric power and the shortage of domestic corridor resources, the capacity increase of the lead is required to be realized under the condition of not changing the original line and erecting a tower. The conductor after increasing capacity can lead to calorific capacity to increase when carrying more heavy current, because traditional aluminium package steel core wire is higher because of aluminium package steel wire coefficient of expansion, and then caused that traditional conductor is heated expansion and elastic elongation serious, the increase of sag influences the circuit safety and moves. At this time, domestic manufacturers prepare to develop an aluminum-clad invar-core heat-resistant aluminum alloy compatibilization conductor, obtain low sag by utilizing the low linear expansion coefficient characteristic of aluminum-clad invar, and obtain compatibilization by utilizing the high conductivity characteristic of a heat-resistant aluminum alloy wire, so as to replace the traditional aluminum-clad steel-core aluminum stranded wire. At present, domestic aluminum-clad steel manufacturers want to adopt an aluminum-clad steel cladding process: paying off high-carbon steel wires, straightening, polishing and cleaning abrasive belts, heating at medium frequency, continuously extruding and coating with aluminum, cooling products, and taking up wires to realize the manufacture of the aluminum-coated invar steel. However, because invar steel has special chemical components, metallographic structure, mechanical and physical properties, the running speed of steel wires is 100m/min in the coating process and the steel wires are shaken, the stable, continuous and tight coating of invar steel cannot be realized by the traditional intermediate frequency heating mode, monitoring and temperature measuring means, and even the situation that the surface of invar steel cannot be completely wrapped by an aluminum layer can occur, so that the manufacturing of aluminum-coated invar steel cannot be realized. Therefore, the control and detection of the heating mode and temperature of the invar steel in the manufacturing process of the aluminum-coated invar steel are particularly important.
Disclosure of Invention
The invention aims to provide a method for manufacturing an aluminum-clad invar wire.
In order to solve the technical problem, the invention provides a manufacturing method of an aluminum-clad invar wire, which comprises the following steps of (1) heating the invar wire to 280-300 ℃; (2) detecting the temperature of the heated invar steel wires by using white paper; (3) the heated invar steel wires are combined with the pure aluminum in a semi-molten state to form the aluminum-coated invar steel rod.
Preferably, the step (2) is specifically to contact the white paper with the preheated surface of the steel wire for 3 seconds, and if the color of the white paper is observed to be yellowish, the temperature of the invar wire is 280-300 ℃.
Preferably, the step (1) is to heat the invar filament to 230-250 ℃ by using an intermediate frequency furnace, and then to 280-300 ℃ by using a high frequency furnace. The method can fully heat the invar steel moving at high speed in a short time, so that the surface of the invar steel can be continuously wrapped with the aluminum layer.
Preferably, the step (3) is specifically that the invar wire and the pure aluminum in a semi-molten state are combined in the mold cavity, the temperature of the mold cavity is controlled at 400-500 ℃, and the coating speed is controlled at 100 m/min.
Preferably, the manufacturing method further comprises (4) cooling the aluminum-clad invar steel rod after the invar steel rod is taken out of the die cavity by cooling water, drying the invar steel rod by using an air blowing valve, and drawing the invar steel rod to a take-up reel for taking up the invar steel rod to complete the manufacturing of the invar steel rod wrapped in aluminum.
Preferably, the invar wire has a strength of 1100Mpa, an elongation of 7.5% or more, and a diameter of 5.9 mm.
Preferably, the manufacturing method further comprises the step of (5) matching the aluminum-coated invar rod with a pressure die and a wire drawing die, and realizing synchronous deformation of steel and aluminum under the lubrication of wire drawing powder, wherein the total compression ratio is controlled to be less than or equal to 82 percent during drawing, the single-pass compression ratio is controlled to be 12-18 percent, and the compression ratio is controlled to be matched in a mode of gradually increasing the number of passes, so that the die drawing is facilitated.
Preferably, in the step (5), the drawing speed is controlled within 2 m/s.
Preferably, the step (5) is repeated, and LBY10-3.2 aluminum-coated invar wire is obtained through multi-pass drawing.
The manufacturing method of the aluminum-coated invar wire has the following beneficial effects:
the problem that the steel wire cannot reach the ideal preheating temperature and the surface of the invar steel cannot be continuously wrapped with the aluminum layer only by heating the invar steel through the intermediate frequency furnace is solved by adding the high-frequency furnace. The method for judging the temperature of the white paper color solves the problem that the temperature cannot be monitored and judged due to high-speed movement and shaking in the invar steel coating process. The manufacturing mode that the specific invar specification is heated according to specific power parameters ensures the repeated stable production of the aluminum-clad invar process. The cladding of the invar steel wrapped by the aluminum is similar to that of the steel wrapped by the aluminum, and only a high-frequency furnace heating device is needed to be added behind the intermediate-frequency furnace, so that the improvement is simple.
Drawings
Fig. 1 is a flowchart of a method of manufacturing an aluminum-wrapped invar wire according to the present application.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1, the present invention provides a method for manufacturing an aluminum-clad invar wire, the method comprising,
(1) heating the invar steel wire to 280-300 ℃, firstly heating the invar steel wire to 230-250 ℃ by using an intermediate frequency furnace, and then heating the invar steel wire to 280-300 ℃ by using a high frequency furnace. The method can fully heat the invar steel moving at high speed in a short time, so that the surface of the invar steel can be continuously wrapped with an aluminum layer, and the invar steel wire has the strength of 1100Mpa, the elongation of more than 7.5 percent and the diameter of 5.9 mm.
(2) The white paper is used for detecting the temperature of the heated invar wire, specifically, the white paper is contacted with the surface of the preheated steel wire for 3 seconds, and if the color of the white paper is observed to be yellowish, the temperature of the invar wire is 280-300 ℃.
(3) The heated invar steel wire is combined with the pure aluminum in the semi-molten state to form the aluminum-coated invar steel rod, specifically, the combination of the invar steel wire and the pure aluminum in the semi-molten state is completed in a mold cavity, the temperature of the mold cavity is controlled at 400-500 ℃, and the coating speed is controlled at 100 m/min.
(4) And cooling the aluminum-coated invar steel rod out of the die cavity by cooling water, drying the rod by a blowing valve, and drawing the rod to a take-up reel for taking up to complete the manufacture of the aluminum-coated invar steel rod.
(5) The aluminum-coated invar steel rod is matched with a drawing die through a pressure die, synchronous deformation of steel and aluminum is realized under the lubrication of drawing powder, the total compression rate is controlled to be less than or equal to 82 percent during drawing, the single-pass compression rate is controlled to be 12-18 percent, the die matching is performed in a mode of gradually increasing the compression rate one by one, the die threading is facilitated, and the drawing speed is controlled within 2 m/s.
And (5) repeating the step (5), and obtaining the LBY10-3.2 aluminum-coated invar wire through multi-pass drawing.
The manufacturing method of the aluminum-coated invar wire has the following beneficial effects:
the problem that the steel wire cannot reach the ideal preheating temperature and the surface of the invar steel cannot be continuously wrapped with the aluminum layer only by heating the invar steel through the intermediate frequency furnace is solved by adding the high-frequency furnace. The method for judging the temperature of the white paper color solves the problem that the temperature cannot be monitored and judged due to high-speed movement and shaking in the invar steel coating process. The manufacturing mode that the specific invar specification is heated according to specific power parameters ensures the repeated stable production of the aluminum-clad invar process. The cladding of the invar steel wrapped by the aluminum is similar to that of the steel wrapped by the aluminum, and only a high-frequency furnace heating device is needed to be added behind the intermediate-frequency furnace, so that the improvement is simple.
The above-mentioned embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (9)
1. The manufacturing method of the aluminum-coated invar wire is characterized by comprising the following steps of (1) heating the invar wire to 280-300 ℃; (2) detecting the temperature of the heated invar steel wires by using white paper; (3) the heated invar steel wires are combined with the pure aluminum in a semi-molten state to form the aluminum-coated invar steel rod.
2. The method of claim 1, wherein the step (2) is performed by contacting the white paper with the preheated surface of the steel wire for 3 seconds, and if the white paper is observed to have yellowish color, the temperature of the illustrative invar wire is 280-300 ℃.
3. The method as claimed in claim 1, wherein the step (1) is performed by heating the invar filament to 230-250 ℃ in an intermediate frequency furnace, and then heating the invar filament to 280-300 ℃ in a high frequency furnace.
4. The method as claimed in claim 1, wherein the step (3) is performed by combining the invar wire and the semi-molten pure aluminum in a mold cavity, wherein the temperature of the mold cavity is controlled to 400-500 ℃, and the coating speed is controlled to 100 m/min.
5. The manufacturing method of claim 1, further comprising (4) cooling the aluminum-wrapped invar rod after leaving the mold cavity with cooling water, drying the rod with a blowing valve, and drawing the rod to a take-up reel for taking up the rod to complete the manufacturing of the aluminum-wrapped invar rod.
6. The method of claim 1, wherein the invar wire has a strength of 1100Mpa, an elongation of 7.5% or more, and a diameter of 5.9 mm.
7. The manufacturing method of claim 5, further comprising (5) passing the aluminum-clad invar steel rod through a pressure die and a wire drawing die to cooperate with each other, and under the lubrication of wire drawing powder, realizing the synchronous deformation of steel and aluminum, wherein the total compression ratio is controlled to be less than or equal to 82% during drawing, the single-pass compression ratio is controlled to be 12% -18%, and the compression ratio is controlled to be matched in a way of gradually increasing the number of passes, so that the die drawing is facilitated.
8. The manufacturing method according to claim 7, wherein in the step (5), the drawing speed is controlled to be within 2 m/s.
9. The method of claim 7, wherein step (5) is repeated to obtain LBY10-3.2 aluminum-clad invar wire by drawing in multiple passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010721088.1A CN111940536A (en) | 2020-07-24 | 2020-07-24 | Method for manufacturing aluminum-coated invar wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010721088.1A CN111940536A (en) | 2020-07-24 | 2020-07-24 | Method for manufacturing aluminum-coated invar wire |
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| CN202010721088.1A Pending CN111940536A (en) | 2020-07-24 | 2020-07-24 | Method for manufacturing aluminum-coated invar wire |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113290072A (en) * | 2021-07-15 | 2021-08-24 | 江苏亨通电力智网科技有限公司 | Manufacturing method of high-strength high-elongation aluminum-coated invar steel wire |
| CN113312683A (en) * | 2021-05-20 | 2021-08-27 | 常州特发华银电线电缆有限公司 | Method for calculating size of aluminum-clad invar steel processing mold by combining EXCEL |
Citations (7)
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|---|---|---|---|---|
| JPS59223114A (en) * | 1983-06-03 | 1984-12-14 | Furukawa Electric Co Ltd:The | Manufacture of aluminum pipe containing plastic covered wire body |
| JPS59226180A (en) * | 1983-06-07 | 1984-12-19 | Sumitomo Electric Ind Ltd | Production of al coated steel wire |
| KR900002031B1 (en) * | 1986-04-30 | 1990-03-31 | 금성전선 주식회사 | Continuous casting method of an aluminium alloy complex wire-rod |
| CN101058101A (en) * | 2007-01-17 | 2007-10-24 | 新华金属制品股份有限公司 | Prestressed aluminium coated steel wire |
| CN104900300A (en) * | 2015-06-12 | 2015-09-09 | 成羽 | Aluminium-covered steel wire and manufacturing process therefor |
| CN106653154A (en) * | 2016-12-23 | 2017-05-10 | 安徽天元电缆有限公司 | High-strength aluminum-clad steel wire and production method thereof |
| CN108986989A (en) * | 2018-07-27 | 2018-12-11 | 湖北长天通信科技有限公司 | A kind of production method of High-strength large-elongation aluminium-clad steel wire |
-
2020
- 2020-07-24 CN CN202010721088.1A patent/CN111940536A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223114A (en) * | 1983-06-03 | 1984-12-14 | Furukawa Electric Co Ltd:The | Manufacture of aluminum pipe containing plastic covered wire body |
| JPS59226180A (en) * | 1983-06-07 | 1984-12-19 | Sumitomo Electric Ind Ltd | Production of al coated steel wire |
| KR900002031B1 (en) * | 1986-04-30 | 1990-03-31 | 금성전선 주식회사 | Continuous casting method of an aluminium alloy complex wire-rod |
| CN101058101A (en) * | 2007-01-17 | 2007-10-24 | 新华金属制品股份有限公司 | Prestressed aluminium coated steel wire |
| CN104900300A (en) * | 2015-06-12 | 2015-09-09 | 成羽 | Aluminium-covered steel wire and manufacturing process therefor |
| CN104900300B (en) * | 2015-06-12 | 2017-03-01 | 成羽 | A kind of aluminum-clad steel wire and its manufacturing process |
| CN106653154A (en) * | 2016-12-23 | 2017-05-10 | 安徽天元电缆有限公司 | High-strength aluminum-clad steel wire and production method thereof |
| CN108986989A (en) * | 2018-07-27 | 2018-12-11 | 湖北长天通信科技有限公司 | A kind of production method of High-strength large-elongation aluminium-clad steel wire |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312683A (en) * | 2021-05-20 | 2021-08-27 | 常州特发华银电线电缆有限公司 | Method for calculating size of aluminum-clad invar steel processing mold by combining EXCEL |
| CN113290072A (en) * | 2021-07-15 | 2021-08-24 | 江苏亨通电力智网科技有限公司 | Manufacturing method of high-strength high-elongation aluminum-coated invar steel wire |
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Application publication date: 20201117 |