Stranded conductor and method for manufacturing stranded conductor
First Claim
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),
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Accused Products
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.
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Citations
15 Claims
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1. A stranded conductor, comprising:
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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), - View Dependent Claims (2, 3, 4, 5)
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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.
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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. - View Dependent Claims (8, 9, 10)
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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.
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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. - View Dependent Claims (13, 14, 15)
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Specification