Stranded conductor and method for manufacturing stranded conductor

• US 10,458,064 B2
• Filed: 05/17/2018
• Issued: 10/29/2019
• Est. Priority Date: 11/17/2015
• Status: Active Grant

• Current Assignee: Furukawa Automotive Systems Incorporated (Furukawa Electric Company Limited), Furukawa Electric Company Limited
• Original Assignee: Furukawa Electric Company Limited
• Inventors: Yoshimaru, Masahiro, Osuga, Hideyuki
• Primary Examiner(s): Mayo, III, William H.
• Assistant Examiner(s): Robinson, Krystal
• Application Number:
  US15/982,375
• Publication Number:
  US 20180266049A1
• Time in Patent Office: 530 Days
• CPC Class Codes: D07B 1/06 Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
• CPC Class Codes: D07B 1/0693 having a strand configuration
• CPC Class Codes: D07B 1/08 the layers of which are formed of profiled interlocking wires, i.e. the strands forming concentric layers D07B1/0606 takes precedence
• CPC Class Codes: D07B 1/147 comprising electric conductors or elements for information transfer D07B1/145 takes precedence
• CPC Class Codes: D07B 2201/2025 characterised by a value or range of the pitch parameter given
• CPC Class Codes: D07B 2201/2031 Different twist pitch
• CPC Class Codes: D07B 2201/204 nine or more wires or filaments respectively forming multiple layers
• CPC Class Codes: D07B 2201/2059 comprising wires
• CPC Class Codes: D07B 2205/306 Aluminium (Al)
• CPC Class Codes: D07B 2207/4045 to change the crystal structure of the load bearing material
• CPC Class Codes: D07B 2501/406 for making electrically conductive cables
• CPC Class Codes: D07B 2801/12 Strand
• CPC Class Codes: D07B 2801/14 Core
• CPC Class Codes: D07B 3/02 in which the supply reels rotate about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the component strands away from the supply reels in fixed position
• CPC Class Codes: H01B 1/023 Alloys based on aluminium
• CPC Class Codes: H01B 13/02 Stranding-up
• CPC Class Codes: H01B 13/0221 by a twisting take-up device
• CPC Class Codes: H01B 13/0285 Pretreatment
• CPC Class Codes: H01B 5/08 Several wires or the like stranded in the form of a rope

Abstract

According to embodiments of the present invention, a stranded conductor is formed in which the occurrence of defects, such as strand unevenness of filaments and outward protrusion of filaments, is inhibited. According to embodiments of the present invention, a stranded conductor (1a) includes soft filaments (2a) stranded together. The soft filaments (2a) include a soft filament made of an aluminum material, disposed along a center (101), and include six soft filaments, twelve soft filaments, and eighteen soft filaments made of an aluminum material, disposed around and concentrically with the center. The filaments are softened filaments that are softened. A lay length (Pa) is from 6.2 times to 15.7 times a conductor diameter of the stranded conductor.

Claims

1. A stranded conductor, comprising:

an inner layer portion; and

an outermost layer disposed outside of and concentrically with the inner layer portion,

wherein the inner layer portion and outermost layer comprise a plurality of filaments stranded together such that the plurality of filaments comprises a plurality of softened filaments made of an aluminum material and identical to one another and includes a filament disposed along a center of the stranded conductor and a predetermined number of filaments disposed around and concentrically with the center, the inner layer portion includes six filaments of the filaments disposed around and concentrically with the center, and twelve filaments of the filaments disposed around and concentrically with the center and the six filaments, and a lay length is from 8.6 times to 22.0 times a conductor diameter of the stranded conductor, the outermost layer is formed of eighteen filaments of the filaments, an outer layer lay length with which the outermost layer is stranded is from 6.8 times to 22.7 times the conductor diameter, and an inner layer lay length of the inner layer portion in a state in which the outermost layer is formed is a value determined by Equation (1),

2. The stranded conductor according to claim 1, wherein the plurality of filaments includes the six filaments that constitute a first filament and the twelve filaments that constitute a second filament such that the first filament and the second filament have an equal lay length.

3. The stranded conductor according to claim 1, wherein at least the six filaments and the twelve filaments have an equal lay length, or, the six filaments, the twelve filaments, and the eighteen filaments have an equal lay length.

4. The stranded conductor according to claim 1, wherein at least the six filaments and the twelve filaments have an equal lay length.

5. The stranded conductor according to claim 1, wherein the six filaments, the twelve filaments, and the eighteen filaments have an equal lay length.

6. A method for manufacturing a stranded conductor, the stranded conductor including filaments made of an aluminum material and identical to one another, the filaments including a filament disposed along a center of the stranded conductor, six filaments stranded around and concentrically with the center, twelve filaments stranded around and concentrically with the center and the six filaments, and eighteen filaments stranded around and concentrically with the center and the twelve filaments,

the method comprising:

softening the filaments; and

stranding together the filaments after the softening,

wherein, in the stranding, a lay length is set to from 6.2 times to 15.7 times a conductor diameter of the stranded conductor and a tension from 1.0 N to 4.5 N is applied to the filaments.

7. A method for manufacturing a stranded conductor, the stranded conductor including filaments made of an aluminum material and identical to one another, the filaments including a filament disposed along a center of the stranded conductor and a predetermined number of filaments stranded around and concentrically with the center,

the method comprising:

stranding six filaments of the plurality of filaments, disposed around and concentrically with the center, and twelve filaments of the plurality of filaments, disposed around and concentrically with the center and the six filaments,

wherein, in the stranding of the six filaments and twelve filaments, a lay length is set to from 6.4 times to 22.0 times a conductor diameter of the stranded conductor and a tension from 1.0 N to 7.0 N is applied to the filaments.

8. The method for manufacturing a stranded conductor, according to claim 7, wherein, in the stranding of the six filaments and twelve filaments, the lay length is set to from 6.4 times to 16.9 times the conductor diameter and a tension from 5.0 N to 7.0 N is applied to the filaments, and after the stranding of the six filaments and twelve filaments, softening the filaments is performed.

9. The method for manufacturing a stranded conductor, according to claim 8, wherein, the stranding of the six filaments and twelve filaments is performed after the softening of the filaments, and in the stranding of the six filaments and twelve filaments, the lay length is set to from 8.6 times to 22.0 times the conductor diameter and a tension from 1.0 N to 4.5 N is applied to the filaments.

10. A method for manufacturing a stranded conductor according to claim 9, wherein the stranded conductor produced by the method according to claim 9 serves as an inner layer portion, the stranding of the six filaments and twelve filaments includes stranding the inner layer portion, and stranding an outermost layer formed of eighteen of the filaments, disposed outside of and concentrically with the inner layer portion, and in the stranding of the outermost layer, an outer layer lay length with which the outermost layer is to be stranded is set to from 6.8 times to 22.7 times the conductor diameter and a tension from 1.0 N to 4.5 N is applied to the filaments and a tension from 20 N to 150 N is applied to the inner layer portion.

11. A method for manufacturing a stranded conductor, the stranded conductor including filaments stranded together, the filaments being made of an aluminum material and identical to one another, the filaments including a filament disposed along a center of the stranded conductor, six filaments disposed around and concentrically with the center, twelve filaments disposed around and concentrically with the center and the six filaments, and eighteen filaments disposed around and concentrically with the center and the twelve filaments,

the method comprising:

softening the filaments; and

stranding together the filaments, the steps being performed in the order stated,

wherein, in the stranding, a lay length is set to from 6.2 times to 15.7 times a conductor diameter of the stranded conductor and a tension per cross-sectional area from 12.5 N/mm² to 56.3 N/mm² is applied to the filaments.

12. A method for manufacturing a stranded conductor, the stranded conductor including filaments stranded together, the filaments being made of an aluminum material and identical to one another, the filaments including a filament disposed along a center of the stranded conductor and a predetermined number of filaments disposed around and concentrically with the center,

the method comprising:

stranding six filaments of the plurality of filaments, disposed around and concentrically with the center, and twelve filaments of the plurality of filaments, disposed around and concentrically with the center and the six filaments,

wherein, in the stranding, a lay length is set to from 6.4 times to 22.0 times a conductor diameter of the stranded conductor and a tension per cross-sectional area from 12.5 N/mm² to 87.5 N/mm² is applied to the filaments.

13. The method for manufacturing the stranded conductor according to claim 12, wherein, in the stranding, the lay length is set to from 6.4 times to 16.9 times the conductor diameter and a tension per cross-sectional area from 62.5 N/mm² to 87.5 N/mm² is applied to the filaments, and softening of the filaments is performed after the stranding.

14. The method for manufacturing the stranded conductor according to claim 12, wherein the stranding is performed after the softening of the filaments, and in the stranding, the lay length is set to from 8.6 times to 22.0 times the conductor diameter and a tension per cross-sectional area from 12.5 N/mm² to 56.3 N/mm² is applied to the filaments.

15. A method for manufacturing a stranded conductor according to claim 14, wherein the stranded conductor produced by the method according to claim 14 serves as an inner layer portion, and the stranding includes stranding the inner layer portion, and stranding an outermost layer formed of eighteen of the filaments, disposed outside of and concentrically with the inner layer portion,

in the stranding of the outermost layer, an outer layer lay length with which the outermost layer is to be stranded is set to from 6.8 times to 22.7 times the conductor diameter, and

in the stranding of the outermost layer, a tension per cross-sectional area from 12.5 N/mm² to 56.3 N/mm² is applied to the filaments and a tension per cross-sectional area from 250.0 N/mm² to 1875.0 N/mm² is applied to the inner layer portion.