Crimp contact for an aluminum stranded wire, and cable end structure of an aluminum stranded wire having the crimp contact connected thereto

• US 20080230269A1
• Filed: 05/27/2008
• Published: 09/25/2008
• Est. Priority Date: 11/24/2005
• Status: Active Grant

• Current Assignee: Furukawa Electric Company Limited
• Original Assignee: Furukawa Electric Company Limited
• Inventors: Hashimoto, Toshiyuki, Susai, Kyota
• Granted Patent: US 7,544,892 B2
• Time in Patent Office: Days
• US Class Current: 174/84C
• CPC Class Codes: H01R 11/12 End pieces terminating in an eye, hook, or fork
• CPC Class Codes: H01R 4/188 having an uneven wire-receiving surface to improve the contact
• CPC Class Codes: H01R 4/62 Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors H01R4/68 takes precedence

Abstract

A crimp contact for an aluminum stranded wire having a serration 5 provided in an inner face 1b of a crimping portion 1 of the crimp contact, wherein a ratio d/e is 0.33 or more, in which d represents a depth of a groove 4 constituting the serration 5 and e represents a diameter of an aluminum wire 7 constituting the aluminum stranded wire 6, and wherein the number of grooves 4 is 3 or more; and a cable end structure of an aluminum stranded wire to which the crimp contact for an aluminum stranded wire is crimped, wherein a ratio between a sectional area of the aluminum stranded wire 6 after the crimping and a sectional area thereof before the crimping, is from 0.7 to 0.95.

Claims

1. A crimp contact for an aluminum stranded wire having a serration provided in an inner face of a crimping portion of the crimp contact, wherein a ratio d/e is 0.33 or more, in which d represents a depth of a groove constituting the serration and e represents a diameter of an aluminum wire constituting the aluminum stranded wire, and wherein the number of grooves is 3 or more.

2. The crimp contact for an aluminum stranded wire according to claim 1, wherein the crimping portion is composed of copper or a copper alloy, and wherein a stress relaxation ratio of the crimping portion is 70% or less.

3. The crimp contact for an aluminum stranded wire according to claim 1, which is composed of brass having a crystal grain size of 50 μ

m or less.

4. The crimp contact for an aluminum stranded wire according to claim 1, which has an electrical conductivity of 25% IACS or more.

5. The crimp contact for an aluminum stranded wire according to claim 1, which has a tensile strength of 400 MPa or more, and a Vickers hardness of 90 N/mm² or more.

6. The crimp contact for an aluminum stranded wire according to claim 1, which has the tensile strength twice or more bigger than a tensile strength of the elemental wires which constitute the aluminum stranded wire, and has the Vickers hardness twice or more bigger than a hardness of the elemental wires which constitute the aluminum stranded wire.

7. The crimp contact for an aluminum stranded wire according to claim 1, which has a surface to which a Sn plating or solder plating is applied so as to have a thickness of 1 μ

m or more and 20 μ

m or less.

8. The crimp contact for an aluminum stranded wire according to claim 7, wherein the Sn plating has a pure Sn layer having a thickness of 0.2 μ

m or more.

9. The crimp contact for an aluminum stranded wire according to claim 7, to which a Cu plating or a Ni plating is applied as an underlying plating for the Sn plating or the solder plating.

10. The crimp contact for an aluminum stranded wire according to claim 7, to which a Cu plating is applied as an underlying plating for the Sn plating, and a Ni plating is applied as an underlying plating for the Cu layer.

11. A cable end structure of an aluminum stranded wire to which the crimp contact for an aluminum stranded wire according to claim 1 is crimped, wherein a ratio p/q is from 0.7 to 0.95, in which p represents a sectional area of the aluminum stranded wire after the crimping and q represents a sectional area of the aluminum stranded wire before the crimping.

12. The cable end structure of an aluminum stranded wire according to claim 11, wherein a thickness of an oxide film of the aluminum wires which constitute the aluminum stranded wire is 20 nm or less.