CN114446539A - Wire single wire preparation mechanism and preparation method thereof - Google Patents
Wire single wire preparation mechanism and preparation method thereof Download PDFInfo
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- CN114446539A CN114446539A CN202111578691.XA CN202111578691A CN114446539A CN 114446539 A CN114446539 A CN 114446539A CN 202111578691 A CN202111578691 A CN 202111578691A CN 114446539 A CN114446539 A CN 114446539A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000004020 conductor Substances 0.000 claims description 18
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- 238000000034 method Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F7/00—Twisting wire; Twisting wire together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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Abstract
The invention provides a wire single line preparation mechanism and a preparation method thereof, wherein the mechanism comprises an input end radial positioning mechanism and an output end radial positioning mechanism which are respectively arranged at two ends of a wire single line; the input end radial positioning mechanism is fixedly connected with the fixing piece, and the output end radial positioning mechanism is fixedly connected with one end of the rotating box through a connecting piece; the other end of the rotating box is connected with the driving mechanism through a connecting bearing; the rotating box takes a single wire of a wire as an axis and rotates along a preset direction. According to the wire single-wire preparation mechanism provided by the invention, one end of a wire single wire is fixed, the other end of the wire single wire is driven to be twisted along the shaft of the input end radial fixing mechanism through the clockwise and anticlockwise rotating box, so that the twisting processing is realized, the obtained product has mechanical strength equivalent to that of the existing axial drawing single wire, the axial length of a wire crystal grain is controlled, the radial gradient of shear strain is introduced, and the conductivity of the prepared twisted and deformed wire single wire is superior to that of the axial drawing wire single wire.
Description
Technical Field
The invention relates to a wire preparation mechanism, in particular to a wire single-wire preparation mechanism and a preparation method thereof.
Background
The wire single line is the core composition of the transmission line, the mechanical strength of the wire single line is related to the safety of the transmission line, the conductivity of the wire single line is directly related to the loss of electric energy, and the pursuit of the wire single line with high strength and good conductivity is the development direction of the safety and low consumption of the transmission line.
In the industry, the currently applied wire single wire preparation technology is a multi-pass reciprocating drawing technology, and dislocation in the single wire is continuously propagated in the multi-pass drawing deformation process, so that the strength of the single wire is favorably improved; however, the proliferation of dislocations aggravates the electron scattering probability during power transmission, reduces the electron transport efficiency, and loses part of conductivity.
Disclosure of Invention
The invention aims to maintain the excellent mechanical strength of the existing single wire of the wire and improve the conductivity of the single wire of the wire; the adopted technical means is that torsional deformation is applied to the single wire of the conducting wire, so that a radial gradient microscopic microstructure structure is introduced into the single wire of the conducting wire, and the conductivity of the single wire is improved while the strength is maintained.
The improvement of a single wire preparation mechanism of a conducting wire,
the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are respectively arranged at two ends of the single wire of the wire; the input end radial positioning mechanism 4 is fixedly connected with the fixing piece, and the output end radial positioning mechanism 5 is fixedly connected with one end of the rotating box 7; the other end of the rotating box 7 is connected with a driving mechanism 9 through a connecting bearing 8;
the rotating box 7 takes a single wire as an axis and rotates along a preset direction.
Preferably, the rotating box 7 is a long strip-shaped rotating box; the cross section of the device is polygonal or circular; an output rotating wheel 6 is arranged in the wire winding machine, and the output rotating wheel 6 is used for winding the wire single wire.
Preferably, the single wire of the wire at the feeding end of the input end radial positioning mechanism 4 is input from the clockwise rotating input rotating wheel 2 after passing through the guide wheel 3.
Preferably, the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are both strip-shaped, the cross section of the strip-shaped radial positioning mechanism is circular or polygonal, and the length of the strip-shaped structure is 15-50 mm.
Preferably, the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 each include a pressure applying member located on the upper side in the longitudinal direction of the single wire of the conductor and a supporting member located on the lower side in the longitudinal direction of the single wire of the conductor;
the contact surfaces of the pressure applying piece and the supporting piece are all elastic material layers for adjusting the radial force;
the supporting piece comprises an elastic material layer and a supporting layer located on the lower side of the elastic material layer, a groove matched with the single wire of the lead is longitudinally formed in the supporting layer, and the supporting layer is made of hard materials.
Preferably, the guide wheels 3 are respectively arranged between the input end radial positioning mechanism 4 and the input rotating wheel 2 and between the output end radial positioning mechanism 5 and the output rotating wheel 6.
Preferably, the guide wheel 3 comprises:
the rotating wheels are respectively arranged at the input end of the input end radial positioning mechanism 4 and the discharge end of the output end radial positioning mechanism 5 on the upper and lower sides of the single wire in the longitudinal direction;
wherein, the rotation direction of the rotating wheels at the upper side and the lower side is different.
Preferably, in the rotating wheels on the upper side and the lower side:
the rotation direction of the rotating wheel on the upper side is opposite to that of the input rotating wheel 2 and the output rotating wheel 6;
the rotation direction of the lower side rotary wheel is the same as that of the input rotary wheel 2 and the output rotary wheel 6.
Preferably, the output shafts of the driving mechanisms for driving the input rotating wheel 2 and the output rotating wheel 6 are respectively vertically arranged with the single wire of the conducting wire.
Preferably, the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are respectively provided with a radial force adjusting mechanism for adjusting the radial force application size of the single wire of the conductor.
In a method for twisting a plurality of wires, the method for twisting the plurality of wires is characterized in that:
the two ends of the single wire of the lead are respectively fixed by the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 which is fixedly connected with the rotating box 7;
and under the rotation of the rotating box 7, the wire single wire at one end of the input end radial positioning mechanism 4 is twisted along the shaft, so that the twisting of the wire single wire is realized.
Preferably, the rotation of the rotation box 7 includes:
after rotating counterclockwise, rotating clockwise; or
After rotating clockwise, rotating counterclockwise;
the number of turns of clockwise rotation is equal to the number of turns of counterclockwise rotation.
Compared with the traditional wire single-wire axial drawing mechanism, the wire single-wire axial drawing mechanism has the advantages that:
according to the technical scheme provided by the invention, one end of the single wire of the wire is fixed by the radial positioning mechanism at the input end, the other end of the single wire of the wire is fixed by the radial positioning mechanism at the output end which can rotate clockwise or anticlockwise in the direction vertical to the axis of the single wire of the wire, and then the rotating box is sequentially twisted in the clockwise direction and the anticlockwise direction, so that the twisting processing of the single wire of the wire is realized, and the obtained twisted single wire of the wire still keeps the same excellent mechanical strength performance as that of the single wire of the axially drawn wire;
secondly, according to the technical scheme provided by the invention, the axial length of crystal grains in the single wire of the wire is controlled by applying the axial torsional deformation to the single wire of the wire at one end fixed in the radial direction and the other end fixed in the radial direction, and meanwhile, the radial gradient of the shear strain is introduced into the single wire of the wire, so that the conductivity of the single wire of the wire deformed in the axial direction is obviously higher than that of the single wire of the wire drawn in the axial direction.
Drawings
FIG. 1 is a schematic diagram of a single wire preparation mechanism of the present invention;
FIG. 2 is an enlarged longitudinal cross-sectional view of the turn box;
wherein:
the method comprises the following steps that 1-1 parts of an initial single wire area of a wire, 1-2 parts of a torsional deformation area of the single wire of the wire, 1-3 parts of a final product area of the single wire of the wire, 1 part of an initial single wire of the wire, 1-4 parts of a torsional deformation single wire of the wire and 1-5 parts of a final torsional single wire of the wire;
the device comprises an input rotating wheel 2, a guide wheel 3, an input end radial positioning mechanism 4, an output end radial positioning mechanism 5, an output rotating wheel 6, a rotating box 7, a connecting bearing 8 and a driving mechanism 9.
Detailed Description
The following describes the mechanism and method for preparing single wire of conductor according to the present invention in detail with reference to fig. 1.
In the present specification, the terms "input" and "output" are in terms of the direction in which the initial conductor element wire 1-1 passes through the initial conductor element wire region 1-1, the conductor element wire torsional deformation region 1-2, and the conductor element wire final product region 1-3 in the sequential order from left to right in the longitudinal direction shown in fig. 1.
In one embodiment of the present invention, an input end radial positioning mechanism 4 and an output end radial positioning mechanism 5, which are coaxial with the axis of the conductor single line, are disposed in the longitudinal direction from the initial conductor single line area 1-1 to the conductor single line final product area 1-3 shown in fig. 1, the input end radial positioning mechanism 4 is fixed by a fixing member (not shown in the drawings), the output end radial positioning mechanism 5 is fixedly connected to one end of a rotating box 7, which rotates clockwise and counterclockwise around the axis, through a connecting member, the other end of the rotating box 7 is coaxially connected to the conductor single line through a connecting bearing 8 and a driving mechanism 9, under the driving of a driving mechanism 9 at the right end of the rotating box 7, the output end radial positioning mechanism 5 at the left end of the rotating box 7 drives the conductor single line fixed to the input end radial positioning mechanism 4 to rotate clockwise around the axis, after the clockwise twisting of the single wire between the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 is realized, the driving mechanism 9 drives the rotating box 7 to perform the anticlockwise twisting at the same revolution, and the single wire is fixed in the radial direction of the input end radial positioning mechanism 4, so that the twisting of the single wire is realized.
As shown in fig. 1, in an embodiment of the present invention, the rotation box 7 is connected to a right-end driving mechanism 9 through a connecting bearing 8, and further rotates clockwise and counterclockwise along the connecting bearing 8 under the driving of the driving mechanism 9. The rotating box 7 is provided therein with a support mechanism (not shown in the drawings) that supports the output rotating wheel 6. The diameter of the vertical direction of the end face of which the cross section at the left end is circular is provided with a fixed connecting piece which is connected with the output end radial positioning mechanism 5.
The single wire preparation mechanism provided by the invention is provided with a support frame, the support frame comprises a fixing part which is provided with a support mechanism for supporting or fixing the input rotating wheel 2, the guide wheel 3, the input end radial positioning mechanism 4, the output end radial positioning mechanism 5, the output rotating wheel 6, the rotating box 7, the connecting bearing 8 and the driving mechanism 9 respectively, and the support mechanisms are all the prior art. The fixing parts for fixing the input end radial positioning mechanism 4, the output end radial positioning mechanism 5, the output rotating wheel 6, the rotating box 7, the connecting bearing 8 and the driving mechanism 9 are all the prior art.
Wherein, input end radial positioning mechanism 4 and output end radial positioning mechanism 5 both are right the same fixed establishment of structure of wire single line radial fixation, but the function is different, and the input end radial positioning mechanism 4 of the left end of figure 1 is the fixed positioning mechanism in the processing period of twisting, and output end radial positioning mechanism 5 is fixed in rotate case 7 left end, be rotatable radial positioning mechanism, also just twist the processing wire single line in the turning round and rotate the positioning mechanism that drives the wire single line of input end radial positioning mechanism 4 twists reverse the realization of its torsional deformation clockwise or anticlockwise at its axle center along with rotating case 7.
Fig. 2 is an enlarged view of a longitudinal section of the rotary box of the present invention, which shows a stage in which the single wire is wound around the output rotary wheel 6 after the single wire passes through the end of the twisted deformed single wire 1-4 in the twisted deformed region 1-2 of the single wire, which is guided by the guide wheel 3 consisting of the rotary wheels on the upper and lower sides of the single wire, and which is fixed by the radial positioning mechanism 5 at the output end of the left end of the rotary box 7 and rotated clockwise.
In one embodiment of the present invention, the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are respectively strip-shaped positioning mechanisms with a cross section of a cylinder (not shown in the figure) or a polygon (not shown in the figure) and a length of 15mm to 50 mm.
In the technical scheme of the application, the wire single-wire preparation mechanism is provided with an input end radial positioning mechanism 4 and an output end radial positioning mechanism 5 which are coaxial with the wire single wire; the feeding end positioning mechanism 4 is fixedly connected with the fixing piece, and the output end radial positioning mechanism 5 can be fixedly connected with one end of a rotating box 7 which rotates clockwise and anticlockwise through a connecting piece; the other end of the rotating box 7 is connected with a driving mechanism through a connecting bearing 8.
The rotating box is a long-strip-shaped rotating mechanism; the cross section of the device is polygonal or circular; the output rotating wheel 6 which winds the conducting wire single wire is arranged in the wire winding machine.
The single wire of the wire at the feeding end of the input end radial positioning mechanism 4 is input from the clockwise rotating input rotating wheel 2 through the guide wheel 3.
The input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are respectively strip-shaped positioning mechanisms which are 15-50 mm long and have cylindrical or polygonal cross sections.
The radial positioning mechanism comprises a pressure applying piece positioned on the upper side in the longitudinal direction of the single wire of the wire and a supporting piece positioned on the lower side of the pressure applying piece; the contact surfaces of the two are all elastic material layers for adjusting the radial force;
the supporting layer supporting the elastic material layer is a hard material layer which is longitudinally provided with a groove matched with the single wire of the lead.
The wire single line guide wheel 3 comprises rotating wheels arranged at the upper side and the lower side of the wire single line and arranged at the feed end of the input end radial positioning mechanism 4 and the output end of the output end radial positioning mechanism 5, the rotating direction of the rotating wheel at one side of the rotating wheels at the upper side and the lower side is the same as that of the input rotating wheel 2 and the output rotating wheel 6, and the rotating direction of the rotating wheel at the other side is opposite to that of the rotating wheel.
The input rotating wheel 2 and the output rotating wheel 6 are respectively perpendicular to the driving mechanism of the single wire longitudinal direction of the conducting wire with the output shaft.
The input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are respectively provided with a radial force adjusting mechanism for adjusting the radial force application size of the single wire of the conductor.
When the single wire of the conducting wire is twisted, under the force application of the radial force adjusting mechanism, a pressure applying piece (not shown in the figure) applies pressure to the single wire of the conducting wire on the supporting piece so as to fix the single wire of the conducting wire to be twisted; when the operation of twisting the single wire of the conductor is finished, the radial force adjusting mechanism releases the force application, so that the feeding or discharging of the single wire of the conductor is realized.
As shown in fig. 1, before twisting, when the initial wire single wire is fed, the radial force adjusting mechanism does not apply pressure to the input/output positioning mechanism, one end of the wire single wire is fixed behind the input end rotating wheel 2 rotating clockwise, and the other end of the wire single wire is guided by the guide wheel 3 (shown in fig. 1) consisting of rotating wheels which are located at the upper and lower longitudinal sides and rotate in different rotating directions, and the input end radial positioning mechanism 4 and the output end radial positioning mechanism 5 are fixed on the rotating wheel 6 which is the same as the rotating direction of the input rotating wheel 2 after being guided by the guide wheel 3 consisting of rotating wheels at the upper and lower longitudinal sides as shown in fig. 1.
The term "different rotating directions" refers to guide wheel groups formed by rotating wheels on the upper side and the lower side of the single wire in the longitudinal direction, and when the single wires move rightwards at two different periods of the initial single wire and the final twisted single wire, guide force for moving the single wires rightwards can be formed. Specifically, in the rotating wheels on the upper side and the lower side:
the rotation direction of the upper guide wheel is opposite to that of the input rotating wheel 2 and the output rotating wheel 6; the lower guide wheel rotates in the same direction as the input rotor 2 and the output rotor 6. Or
The direction of rotation of the guide wheels constituting the upper side is opposite to the input rotary wheel 2 and the output rotary wheel 6;
the lower guide wheel rotates in the same direction as the input rotor 2 and the output rotor 6.
When a single wire is twisted, the force adjusting mechanisms (not shown in the figure) of the input end radial positioning mechanism and the output end radial positioning mechanism respectively apply pressure to the input end and the output end of the single wire on the supporting piece through the pressure applying piece, so that the input end and the output end of the single wire to be twisted are radially fixed, the driving mechanism 9 at the right end of the rotating box 7 is started, the rotating box 7 is driven by the driving mechanism 9 to rotate clockwise and then rotate anticlockwise or rotate anticlockwise and then rotate clockwise, and then the twisting processing of the single wire can be realized, and the whole process for preparing the single wire can be completed.
The driving mechanism 9 in one embodiment of the invention is a motor, and a single wire of a lead with a length of more than 1 kilometer in a gradient structure can be continuously manufactured by adjusting the rotating speed of the motor and controlling the number of turns of clockwise and anticlockwise rotation of the motor; the technical scheme provided by the invention can obtain a shear strain gradient of 0.01 to 100 per meter and a deformation rate of 0.05 to 2 m/s.
The embodiment of the invention also provides a single-wire twisting preparation method of the conductor, which comprises the following steps: the two ends of the single wire of the conducting wire are respectively fixed by an input end radial positioning mechanism 4 and an output end radial positioning mechanism 5, the output end radial positioning mechanism 5 is fixed on a rotating box 7 which can rotate clockwise or anticlockwise in the direction vertical to the axis of the single wire of the conducting wire, and then the rotating box 7 rotates clockwise or anticlockwise to twist the single wire of the conducting wire so as to control the axial length of crystal grains in the single wire of the conducting wire, meanwhile, a shear strain radial gradient is introduced into the single wire of the conducting wire, and the excellent effect that the conductivity of the single wire of the conducting wire is obviously higher than that of an axially drawn single wire of the conducting wire is obtained by axially twisting and deforming the single wire of the conducting wire.
The rotating box rotates in the clockwise direction and the anticlockwise direction for equal turns.
The rotating direction of the rotating box 7 firstly rotates anticlockwise and then rotates clockwise; or rotate clockwise and then rotate counterclockwise.
While the present invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A wire single-wire preparation mechanism, which is characterized in that,
an input end radial positioning mechanism (4) and an output end radial positioning mechanism (5) which are respectively arranged at two ends of a single wire of the conducting wire; the input end radial positioning mechanism (4) is fixedly connected with the fixing piece, and the output end radial positioning mechanism (5) is fixedly connected with one end of the rotating box (7) through a connecting piece; the other end of the rotating box (7) is connected with a driving mechanism (9) through a connecting bearing (8);
the rotating box (7) takes a single wire of a conducting wire as an axis and rotates along a preset direction.
2. The single wire preparing mechanism of claim 1,
the rotating box (7) is a strip-shaped rotating box; the cross section of the device is polygonal or circular; an output rotating wheel (6) is arranged in the wire winding machine, and the output rotating wheel (6) is used for winding the single wire of the wire.
3. The single wire preparing mechanism of claim 2,
the single wire of the wire at the feeding end of the input end radial positioning mechanism (4) is input from the clockwise rotating input rotating wheel (2) after passing through the guide wheel (3).
4. The single-wire preparation mechanism of claim 1, wherein the radial input end positioning mechanism (4) and the radial output end positioning mechanism (5) are both strip-shaped, the cross section of the strip-shaped radial positioning mechanism is circular or polygonal, and the length of the strip-shaped radial positioning mechanism is 15 mm-50 mm.
5. The single wire preparing mechanism as claimed in claim 1, wherein said input end radial positioning means (4) and said output end radial positioning means (5) each comprise a pressure applying member located on the upper side in the longitudinal direction of said single wire and a supporting member located on the lower side in the longitudinal direction of said single wire;
the contact surfaces of the pressure applying piece and the supporting piece are all elastic material layers for adjusting the radial force;
the supporting piece comprises an elastic material layer and a supporting layer located on the lower side of the elastic material layer, a groove matched with the single wire of the lead is longitudinally formed in the supporting layer, and the supporting layer is a hard material layer.
6. A single wire preparation mechanism as claimed in claim 3, wherein said guide wheels (3) are respectively provided between said input end radial positioning means (4) and said input rotary wheel (2) and between said output end radial positioning means (5) and said output rotary wheel (6).
7. The single wire preparation mechanism as claimed in claim 6, wherein said guide wheel (3) comprises:
the rotating wheels are respectively arranged at the input end of the input end radial positioning mechanism (4) and the discharge end of the output end radial positioning mechanism (5) and are arranged at the upper side and the lower side of the single wire in the longitudinal direction;
wherein, the rotation direction of the rotating wheels at the upper side and the lower side is different.
8. The single wire preparing mechanism of claim 7,
among the rotatory wheel of upper and lower both sides:
the rotation direction of the rotating wheel on the upper side is opposite to that of the input rotating wheel (2) and the output rotating wheel (6);
the rotation direction of the rotating wheel on the lower side is the same as that of the input rotating wheel (2) and the output rotating wheel (6).
9. The single wire preparing mechanism of claim 3,
and output shafts of driving mechanisms for driving the input rotating wheel (2) and the output rotating wheel (6) are respectively vertically arranged with the single wire of the conducting wire in the longitudinal direction.
10. The single wire preparation mechanism as claimed in claim 1, wherein said input end radial positioning means (4) and said output end radial positioning means (5) are respectively provided with radial force adjusting means for adjusting the magnitude of the radial force applied to said single wire.
11. A method for producing a twisted wire strand, wherein the twisted wire strand is twisted by the wire strand production mechanism according to any one of claims 1 to 10, the production method comprising:
the two ends of the single wire of the lead are respectively fixed by the input end radial positioning mechanism (4) and the output end radial positioning mechanism (5) which is fixedly connected with the rotating box (7);
and under the rotation of the rotating box (7), the wire single wire at one end of the input end radial positioning mechanism (4) is twisted along the shaft, so that the twisting of the wire single wire is realized.
12. The method for preparing a twisted single wire of a conductor as claimed in claim 11, wherein the rotation of said rotating box (7) comprises:
after rotating counterclockwise, rotating clockwise; or
After rotating clockwise, rotating counterclockwise;
the number of turns of clockwise rotation is equal to the number of turns of counterclockwise rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111578691.XA CN114446539B (en) | 2021-12-22 | 2021-12-22 | Wire single-wire preparation mechanism and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111578691.XA CN114446539B (en) | 2021-12-22 | 2021-12-22 | Wire single-wire preparation mechanism and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979740A (en) * | 2014-04-08 | 2015-10-14 | 萨拉李质量工程有限责任公司 | Method and device for determining or aligning the angular position of individual wires within a sheathed cable containing twisted wires |
| US20170106421A1 (en) * | 2014-06-06 | 2017-04-20 | Koninklijke Philips N.V. | Manufacturing of litz wire |
| CN110923438A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院金属研究所 | Circular torsion machining process for improving mechanical property of metal material |
| CN113802073A (en) * | 2021-08-16 | 2021-12-17 | 西南交通大学 | Preparation method of metal bar with wide-size gradual-evolution gradient nano structure |
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2021
- 2021-12-22 CN CN202111578691.XA patent/CN114446539B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979740A (en) * | 2014-04-08 | 2015-10-14 | 萨拉李质量工程有限责任公司 | Method and device for determining or aligning the angular position of individual wires within a sheathed cable containing twisted wires |
| US20170106421A1 (en) * | 2014-06-06 | 2017-04-20 | Koninklijke Philips N.V. | Manufacturing of litz wire |
| CN110923438A (en) * | 2019-10-30 | 2020-03-27 | 中国科学院金属研究所 | Circular torsion machining process for improving mechanical property of metal material |
| CN113802073A (en) * | 2021-08-16 | 2021-12-17 | 西南交通大学 | Preparation method of metal bar with wide-size gradual-evolution gradient nano structure |
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