CN116116920A - Ultra-fine metal wire drawing process - Google Patents
Ultra-fine metal wire drawing process Download PDFInfo
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- CN116116920A CN116116920A CN202310408201.4A CN202310408201A CN116116920A CN 116116920 A CN116116920 A CN 116116920A CN 202310408201 A CN202310408201 A CN 202310408201A CN 116116920 A CN116116920 A CN 116116920A
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- fan
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- metal wire
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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
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
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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
- B21C37/045—Manufacture of wire or bars with particular section or properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F13/00—Splitting wire
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Abstract
The invention discloses an ultrafine metal wire drawing process, which relates to the field of metal drawing processes and comprises the following steps of: preparing materials: manufacturing a fan-shaped metal wire rod; bonding: bonding a plurality of the fan-shaped metal wires into a circular metal wire by an adhesive; drawing: drawing the round metal wire multiple times to thin the round metal wire; breaking and dismantling: the drawn round metal wire is broken and separated into a plurality of ultra-fine metal wires, and compared with the prior art, the metal wires prepared by the invention are finer. When the drawing die stretches the round metal wires, the drawing die stretches the fan-shaped metal wires simultaneously, and then the metal wires are broken and split into a plurality of metal wires after being drawn, so that the drawing efficiency is higher.
Description
Technical Field
The invention relates to the field of metal wire processes, in particular to an ultrafine metal wire stretching process.
Background
The existing copper wire stretching process generally comprises the steps of stretching and annealing a copper bar through a drawing die, and repeating the operations to obtain superfine copper wires, wherein the thinner the copper wires are, the easier the copper wires are broken when the outer diameter of the copper wires is smaller than 0.03mm, so that the sectional area of the copper wires manufactured through the drawing die stretching process is not smaller than 0.0007 square mm. For example, the invention patent with publication number CN106714991a discloses a device for cold drawing metal wires, which comprises a sleeve and a drawing die, wherein the drawing die is provided with a conical hole, and if a copper bar is to be drawn into superfine copper wires, the copper bar can be drawn into copper wires through a plurality of drawing dies in sequence, so that the time consumption is long and the efficiency is low. In view of this, the present invention has been made in view of the above problems, and proposes an ultra-fine wire drawing process.
Disclosure of Invention
The invention mainly aims to provide an ultrafine metal wire stretching process, which is characterized in that a plurality of fan-shaped metal wires are adhered into round metal wires, then the round metal wires are drawn for a plurality of times, and finally the round metal wires are broken and disassembled into a plurality of ultrafine metal wires with extremely small cross-sectional areas, and the production efficiency is high.
The invention provides an ultrafine metal wire drawing process, which comprises the following steps of:
preparing materials: manufacturing a fan-shaped metal wire rod;
bonding: bonding a plurality of the fan-shaped metal wires into a circular metal wire by an adhesive;
drawing: drawing the round metal wire multiple times to thin the round metal wire;
breaking and dismantling: breaking and separating the drawn round metal wire into a plurality of ultrafine metal wires, wherein the cross section of each ultrafine metal wire is fan-shaped.
Further, the fan-shaped metal wire rod is made of a fan-shaped rolling mill-pressed round bar, the fan-shaped rolling mill is composed of an upper roller and a lower roller, one of the upper roller and the lower roller is provided with a first groove with a triangular section, the other is provided with a second groove with an arc-shaped section, and the first groove and the second groove are opposite to each other to form a fan-shaped mill-pressed hole.
Further, the adhesive is metal powder, and the bonding process comprises the following steps: firstly spraying the metal powder on the surface of each fan-shaped metal wire, and then adjusting the relative positions of the fan-shaped metal wires to ensure that a plurality of fan-shaped metal wires are circumferentially distributed at intervals and are bundled into round metal wires; under the protection of nitrogen, heating the round metal wire, melting the metal powder, fastening and bonding all the fan-shaped metal wires, and finally annealing and softening the round metal wire; and oxygen between the metal powder and the fan-shaped metal wires can form metal oxide in the melting process of the metal powder.
Further, the metal powder and the fan-shaped metal wire are the same metal.
Further, the drawing process includes the steps of: and carrying out multi-drawing die drawing on the annealed and softened round metal wire rod so as to thin the round metal wire rod.
Further, the round metal wire subjected to multi-connection drawing die drawing is subjected to barrel drawing for a plurality of times, so that the round metal wire is thinned.
Further, the breaking-in procedure comprises the following steps: firstly, heating the round metal wires in a nitrogen environment containing a small amount of hydrogen, reacting the hydrogen with the metal oxide to generate steam, damaging the bonding parts among the fan-shaped metal wires, and repeatedly bending and correcting the round metal wires to separate the round metal wires into a plurality of ultrafine metal wires.
The cross section area of the superfine copper wire manufactured by the superfine metal wire stretching process is in the range of 0.00002-0.00035 square millimeter.
The beneficial effects of the invention are as follows:
1. the metal wires are drawn through the drawing die, and the metal wires can be obtained only by the drawing die one by one in the existing drawing process.
2. The existing metal wire stretching process can stretch out copper wires with the sectional area of 0.0007 square millimeters, but the invention can stretch the copper wires of the round metal wires into copper wires with the sectional area of 0.0007 square millimeters, and then break and tear the copper wires into superfine copper wires with the sectional area of 0.00002-0.00035 square millimeters, so that the copper wires prepared by the invention are finer.
Drawings
Fig. 1 is a schematic view of the structure of an upper roller and a lower roller according to an embodiment of the invention.
Fig. 2 is a cross-sectional view of the A-A plane of fig. 1.
Fig. 3 is a side view of a round metal wire in an embodiment of the invention.
Fig. 4 is a schematic diagram of a multiple die drawing round wire in an embodiment of the invention.
Fig. 5 is a schematic diagram of a single die drawing round wire in an embodiment of the invention.
Fig. 6 is a schematic diagram of a breaking process in an embodiment of the invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
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 identify like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships as described based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed therewith; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature through an intermediary, and further, a first feature "above", "above" and "over" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Referring to fig. 1-6, an embodiment of a wire prepared by the ultra-fine wire drawing process of the present invention is presented:
an ultra-fine wire drawing process comprising the steps of:
preparing materials: manufacturing a fan-shaped metal wire 11;
bonding: bonding a plurality of fan-shaped metal wires 11 into a circular metal wire 12 by an adhesive;
drawing: drawing the round wire rod 12 a plurality of times to thin the round wire rod 12;
breaking and dismantling: breaking and separating the drawn round metal wire 12 into a plurality of ultrafine metal wires, wherein the cross section of each ultrafine metal wire is fan-shaped.
As shown in fig. 1 and 2, the fan-shaped metal wire 11 is made of a circular bar by fan-shaped rolling mill, the fan-shaped rolling mill is composed of an upper roller 21 and a lower roller 22, one of the upper roller 21 and the lower roller 22 is provided with a first groove 23 with a triangular section, the other is provided with a second groove 24 with an arc-shaped section, the first groove 23 and the second groove 24 are opposite to each other to form a fan-shaped mill hole 25, and the angle of the fan-shaped mill hole 25 can be changed by changing the first groove 23 and the second groove 24 with different sizes, so that the angle of the fan-shaped metal wire 11 after the circular bar is processed can be changed.
As shown in fig. 3, the adhesive is metal powder, and the metal powder and the fan-shaped metal wires 11 are the same metal. The bonding process comprises the following steps: firstly, spraying metal powder on the surface of each fan-shaped metal wire 11, and then adjusting the relative positions of the fan-shaped metal wires 11 to ensure that a plurality of fan-shaped metal wires 11 are circumferentially distributed at intervals and are bundled into round metal wires 12; under the protection of nitrogen, the round metal wire 12 is heated, the metal powder is melted before the round metal wire 12 due to the smaller particle size of the metal powder in the heating process, and when the temperature is raised until the metal powder is melted, the heat is preserved, and the melted metal powder fastens and adheres all the fan-shaped metal wires 11; finally annealing and softening the round metal wire rod 12; the metal powder forms a metal oxide with oxygen between the fan-shaped metal wires 11 during the melting process.
As shown in fig. 4 and 5, the drawing process includes the steps of: the annealed and softened round metal wires 12 are drawn by multiple drawing dies, the round metal wires 12 sequentially pass through a plurality of drawing dies 31 which are linearly arranged, so that the round metal wires 12 are thinned, and then the round metal wires 12 are drawn by a plurality of barrel-coiling processes (not marked in the drawing), so that the round metal wires 12 are further made to be more slender. In the multiple die drawing process, the power transmission tool for the round wire rod 12 is a drum 32.
As shown in fig. 6, the breaking-in procedure includes the steps of: firstly, the round metal wires 12 are heated in a nitrogen environment containing a small amount of hydrogen, the hydrogen content ranges from 5% to 25%, the hydrogen reacts with metal oxides to generate water vapor, the bonding between the fan-shaped metal wires 11 is destroyed, and then the round metal wires 12 are repeatedly bent and straightened by a plurality of cylinders 33 arranged on two sides of the round metal wires 12, so that the round metal wires 12 are separated into a plurality of ultrafine metal wires.
The fan-shaped angle range of the fan-shaped metal wires 11 is 10-180 degrees, one round metal wire 12 can be composed of 2-36 fan-shaped metal wires 11, and the more the number of the fan-shaped metal wires 11 is, the more the number of the ultra-fine metal wires obtained by breaking and disassembling the round metal wires 12 is, and the smaller the sectional area of the ultra-fine metal wires is.
The metal wires are drawn through the drawing die, and the metal wires can be obtained only by the drawing die one by one in the existing drawing process.
Specifically, the superfine copper wire is prepared by the process, and in the bonding procedure, the adhesive is superfine copper powder, and the melting temperature of the superfine copper powder is 800 ℃. Because the copper wire with the diameter smaller than 0.03mm can be frequently broken when being drawn by a drawing die, in the drawing process, the round copper wire is drawn to the diameter between 0.03-0.05 mm through a multi-joint drawing die, the round copper wire is further thinned through a barrel drawing process, the barrel drawing strength is smaller than the drawing die drawing strength, and the copper wire is not easy to break. In the breaking process, the temperature at which the bonding between the fan-shaped copper wires is broken is 700 ℃. The fan-shaped sectional area of the broken superfine copper wire ranges from 0.00002 to 0.00035 square millimeters, and the existing metal wire stretching process only can stretch out the copper wire with the sectional area of 0.0007 square millimeters.
In the description of the present specification, reference to descriptions as pertaining to "one embodiment," "some embodiments," "examples," "particular examples," or "some examples" and the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example x is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples, and further, different embodiments or examples, and features of different embodiments or examples, described in this specification may be combined and combined by those skilled in the art without contradiction to each other.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An ultra-fine wire drawing process comprising the steps of:
preparing materials: manufacturing a fan-shaped metal wire rod;
bonding: bonding a plurality of the fan-shaped metal wires into a circular metal wire by an adhesive;
drawing: drawing the round metal wire multiple times to thin the round metal wire;
breaking and dismantling: breaking and separating the drawn round metal wire into a plurality of ultrafine metal wires, wherein the cross section of each ultrafine metal wire is fan-shaped.
2. The process according to claim 1, wherein the fan-shaped metal wire is made of a circular bar by fan-shaped rolling mill, the fan-shaped rolling mill is composed of an upper roller and a lower roller, one of the upper roller and the lower roller is provided with a first groove with a triangular cross section, the other is provided with a second groove with an arc cross section, and the first groove and the second groove are opposite to form a fan-shaped mill hole.
3. The process of claim 1, wherein the binder is a metal powder, and the bonding step comprises the steps of: firstly spraying the metal powder on the surface of each fan-shaped metal wire, and then adjusting the relative positions of the fan-shaped metal wires to ensure that a plurality of fan-shaped metal wires are circumferentially distributed at intervals and are bundled into round metal wires; under the protection of nitrogen, heating the round metal wire, melting the metal powder, fastening and bonding all the fan-shaped metal wires, and finally annealing and softening the round metal wire; and oxygen between the metal powder and the fan-shaped metal wires can form metal oxide in the melting process of the metal powder.
4. The ultra-fine wire drawing process according to claim 3, wherein the metal powder and the fan-shaped metal wire are the same metal.
5. The ultra-fine wire drawing process according to claim 1, wherein the drawing process comprises the steps of: carrying out multi-drawing die drawing on the annealed and softened round metal wire rod so as to thin the round metal wire rod; and then carrying out multiple drum drawing on the round metal wire.
6. The ultra-fine wire drawing process according to claim 3, wherein the breaking and disassembling step comprises the steps of: firstly, heating the round metal wires in a nitrogen environment containing a small amount of hydrogen, reacting the hydrogen with the metal oxide to generate steam, damaging the bonding parts among the fan-shaped metal wires, and repeatedly bending and correcting the round metal wires to separate the round metal wires into a plurality of ultrafine metal wires.
7. The process of drawing ultra-fine wires according to any one of claims 1 to 6, wherein the ultra-fine copper wires are manufactured with a cross-sectional area ranging from 0.00002 to 0.00035 square mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310408201.4A CN116116920B (en) | 2023-04-17 | 2023-04-17 | Ultra-fine metal wire drawing process |
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| CN202310408201.4A CN116116920B (en) | 2023-04-17 | 2023-04-17 | Ultra-fine metal wire drawing process |
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| CN116116920B CN116116920B (en) | 2023-07-04 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574604A (en) * | 1984-11-13 | 1986-03-11 | Essex Group, Inc. | Process and apparatus for high speed fabrication of copper wire |
| US20030135971A1 (en) * | 1997-11-12 | 2003-07-24 | Michael Liberman | Bundle draw based processing of nanofibers and method of making |
| JP2005232502A (en) * | 2004-02-18 | 2005-09-02 | Mitsubishi Electric Corp | Metal-matrix composite material and its manufacturing method |
| CN104550308A (en) * | 2013-10-25 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method of superfine metal fiber and superfine metal fiber prepared by preparation method |
| CN105081000A (en) * | 2015-09-06 | 2015-11-25 | 成羽 | Metal fiber manufacturing method and device |
| CN111715722A (en) * | 2020-06-19 | 2020-09-29 | 西安菲尔特金属过滤材料股份有限公司 | Preparation method of multi-core-number blended metal fiber for X and gamma ray protection |
| CN113611440A (en) * | 2021-08-04 | 2021-11-05 | 江阴金属材料创新研究院有限公司 | High-strength damping special-shaped copper alloy ultra-micro wire harness and production process thereof |
-
2023
- 2023-04-17 CN CN202310408201.4A patent/CN116116920B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574604A (en) * | 1984-11-13 | 1986-03-11 | Essex Group, Inc. | Process and apparatus for high speed fabrication of copper wire |
| US20030135971A1 (en) * | 1997-11-12 | 2003-07-24 | Michael Liberman | Bundle draw based processing of nanofibers and method of making |
| JP2005232502A (en) * | 2004-02-18 | 2005-09-02 | Mitsubishi Electric Corp | Metal-matrix composite material and its manufacturing method |
| CN104550308A (en) * | 2013-10-25 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method of superfine metal fiber and superfine metal fiber prepared by preparation method |
| CN105081000A (en) * | 2015-09-06 | 2015-11-25 | 成羽 | Metal fiber manufacturing method and device |
| CN111715722A (en) * | 2020-06-19 | 2020-09-29 | 西安菲尔特金属过滤材料股份有限公司 | Preparation method of multi-core-number blended metal fiber for X and gamma ray protection |
| CN113611440A (en) * | 2021-08-04 | 2021-11-05 | 江阴金属材料创新研究院有限公司 | High-strength damping special-shaped copper alloy ultra-micro wire harness and production process thereof |
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| CN116116920B (en) | 2023-07-04 |
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