Cylindrical body, crimp terminal, and manufacturing method thereof, as well as manufacturing apparatus of crimp terminal

Patent metadata

Field	Value
Publication number	US-9608338-B2
Application number	US-201514832682-A
Country	US
Kind code	B2
Filing date	Aug 21, 2015
Priority date	Feb 23, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Following the cylindrical bend processing of the shape crimping portion corresponding part corresponding to the crimping section in the sheet-shaped terminal base material, the high bending-rate processing process of bend processing at a bending rate higher than a bending rate for plastically deforming at least a part of a deformation portion to be plastically deformed in a predetermined bend processing shape in the crimping portion corresponding part, and the shaping process of shaping the crimping portion corresponding part into the cylindrical crimping section are performed in this order.

First claim

The invention claimed is:

1. A cylindrical body obtained by bend processing at least a part of a bend processing portion of a sheet member into a cylindrical shape, wherein
at an external portion of the bend processing portion in a thickness direction, internal stress of pulling outward in a peripheral direction works, and at an internal portion in a thickness direction, internal stress of compressing inward in the peripheral direction works.

2. A crimp terminal that has a connection part to be connected to a connection other-side member, a transition section for joining the connection part and a crimping section, and the crimping section, arranged in this order, from a tip side to a base side in a terminal axis direction, and
has the transition section formed by raising a bottom to the connection part and the crimping section.

3. The crimp terminal according to claim 2 , wherein
a welding part that is fixed along the terminal axis direction by welding, by a high-energy density heat source, both ends in a peripheral direction of the crimping section that is cylindrically bend processed by a terminal bend processing unit is formed at the both ends.

4. A sheet-shaped terminal metal fitting in a pre-bend processing state of the crimp terminal according to claim 2 or 3 , the terminal metal fitting comprising a cylindrical crimping section which crimps a conductor tip having an insulating cover peeled off at least at a tip side of an insulated wire which covers a conductor with the insulating cover, and a sealing portion for sealing an opening part of the crimping section at a tip side in the terminal axis direction, wherein
the crimping section comprises
a conductor crimping section that crimps the conductor tip, a cover crimping section that crimps the conductor tip, and a step that is present between the conductor crimping section and the cover crimping section,
a crimping portion corresponding part which corresponds to the crimping section before a bend processing
is formed in a width corresponding to an external peripheral shape of each of the conductor crimping section, the step, and the cover crimping section, along a base end side to a tip side in a terminal axis direction, and is also formed so that an external end part in a width direction becomes an inclined shape to the terminal axis direction so as to be gradually in a small width, and
a sealing portion corresponding part which corresponds to the sealing portion before the bend processing
is formed in a width corresponding to an external peripheral shape of the sealing portion, and is also formed so that an external end part in a width direction becomes approximately parallel to the terminal axis direction.

5. A wire harness comprising a plurality of crimping connection structural bodies that have the crimping section in the crimp terminal according to claim 2 or 3 crimp connected by swaging, to a conductor tip which has a conductor exposed by peeling off an insulating cover at least at a tip side of an insulated wire covering the conductor with the insulating cover, and also comprising a connector housing which can house the crimp terminal in a connection structural body, wherein
the crimp terminal is arranged in the connector housing.

6. A sheet-shaped terminal metal fitting in a pre-bend processing state of a crimp terminal, the terminal metal fitting comprising: a connection part to be connected to a connection other-side member; a cylindrical crimping section which crimps a conductor tip having an insulating cover peeled off at least at a tip side of an insulated wire which covers a conductor with the insulating cover; and a transition section for joining the connection part and the crimping section, from a tip side to a base side in a terminal axis direction, wherein
the crimping section is bend processed into a cylindrical shape and is formed so that the end parts of the crimping section are butted against each other without a gap along the terminal axis direction, the end parts being opposed in a peripheral direction, the crimping section comprising: a sealing portion for sealing the cylindrical crimping section at a tip side; a conductor crimping section that crimps the conductor tip; a cover crimping section that crimps the conductor tip; and a step that is interposed between the conductor crimping section and the cover crimping section,
a crimping section corresponding part which corresponds to the crimping section before a bend processing is formed with a width corresponding to an external peripheral shape of each of the conductor crimping section, the step, and the cover crimping section along a base end side to a tip side in a terminal axis direction, and is also formed so that an external end part in a width direction becomes an inclined shape to the terminal axis direction so as to be gradually narrowed in width, and
the base end side end part of the crimping section corresponding part in the axis direction is formed by inclining the external end part in a terminal width direction with respect to the terminal width direction so that the external end part approaches a connection part side.

7. A terminal metal fitting according to claim 6 , wherein the crimping section corresponding part includes a conductor crimping section corresponding part corresponding to the conductor crimping section and a cover crimping section corresponding part corresponding to the cover crimping section, and the cover crimping section corresponding part and the conductor crimping section corresponding part are formed so that an external end part in a width direction becomes an inclined shape to the terminal axis direction along the base end side to the tip side so as to be gradually narrowed in width.

8. A terminal metal fitting according to claim 7 , wherein a serration is formed in a bow shape in a plan-view such that a center portion relative to outside in the width direction is gradually curved to the base end side in an inner surface of the conductor crimping section corresponding part.

9. A terminal metal fitting according to claim 6 , wherein a sealing portion corresponding part which corresponds to the sealing portion is formed on a tip side of the crimping section corresponding part, and the sealing portion corresponding part is formed so that an external end part of the sealing portion corresponding part in a width direction becomes parallel to the terminal axis direction.

10. A terminal metal fitting according to claim 6 , wherein the terminal metal fitting has a notched part that is formed by notching an external end part in the width direction on sidewalls at both sides of the width direction in a continuously-provided portion between the connection part and the transition section.

11. A crimp terminal formed by bend processing the terminal metal fitting according to claim 6 , the crimp terminal comprising: a connection part to be connected to a connection other-side member; a cylindrical crimping section which crimps a conductor tip having an insulating cover peeled off at least at a tip side of an insulated wire which covers a conductor with the insulating cover; and a transition section for joining the connection part and the crimping section, from a tip side to a base side in a terminal axis direction.

12. A wire harness comprising a plurality of crimping connection structural bodies that have the crimping section in the crimp terminal according to claim 11 crimp connected by swaging, to a conductor tip which has a conductor exposed by peeling off an insulating cover at least at a tip side of an insulated wire covering the conductor with the insulating cover, and also comprising a connector housing which ca

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Systems Inc
• Furukawa Electronic Co Ltd
• Furukawa Automotive Systems Inc

Inventors

• TERASHIMA Ryusuke
• Kuwabara Mikio
• Sakamoto Kentaro

Classifications

• H01R13/5221

  having cable sealing means · CPC title

• H01R4/183 Primary

  for cylindrical elongated bodies, e.g. cables having circular cross-section (H01R4/01 takes precedence) · CPC title

• H01R43/048

  Crimping apparatus or processes (H01R43/042 takes precedence) · CPC title

• H01R4/62

  Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors (H01R4/68 takes precedence) · CPC title

• H01R4/187

  combined with soldering or welding · CPC title