Manufacturing method of cylindrical body crimp terminal

Patent metadata

Field	Value
Publication number	US-10763596-B2
Application number	US-201715419608-A
Country	US
Kind code	B2
Filing date	Jan 30, 2017
Priority date	Feb 23, 2013
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

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 manufacturing method of a cylindrical body for processing at least a part of a bend processing portion of a sheet member from an unprocessed shape into a cylindrical shape, the manufacturing method comprising performing in order:
a high bending-rate processing process of bend processing at least a part of the bend processing portion in a width direction at a bending rate higher than a bending rate for plastically deforming the part from the unprocessed shape into the cylindrical shape; and
a shaping process of shaping the bend processing portion processed in the high bending-rate processing process into the cylindrical shape such that each end part of the bend processing portion in a width direction are butted against each other when the bend processing portion is shaped processed into the cylindrical shape, and an inward force occurs in each of the end parts that are abutted against each other,
wherein the bend processing portion that is formed by the high bending rate processing process is formed into a V shape, and
wherein a curvature of a valley formed by the V shape of the V shaped bend processing portion is greater than a curvature of the cylindrical shape.

2. A manufacturing method of a crimp terminal having a cylindrical crimping section, the manufacturing method comprising:
a high bending-rate processing process including
forming a sheet member by a sheet-shaped terminal base material comprising a crimping portion corresponding part which corresponds to the crimping section before a bend processing,
bend processing at least a part of a deformation portion to be plastically deformed into a predetermined bend processing shape in the crimping portion corresponding part, at a bending rate higher than a bending rate of plastically deforming the part from an unprocessed shape into a cylindrical shape, along with the bend processing of at least the crimping portion corresponding part of the terminal base material from the unprocessed shape into the cylindrical shape; and
a shaping process of shaping, after the high bending-rate processing process, the crimping portion corresponding part processed in the high bending-rate processing process into the crimping section of the cylindrical shape, such that each end part of the crimping portion corresponding part in a width direction are butted against each other when the crimping portion corresponding part is shaped processed into the cylindrical shape, and an inward force occurs in each of the end parts that are abutted against each other,
wherein the crimping portion formed by the high bending rate processing process is formed into a V shape, and
wherein a curvature of a valley formed by the V shape of the V shaped crimping portion is greater than a curvature of the cylindrical shape.

3. The manufacturing method of a crimp terminal according to claim 2 , comprising:
setting the deformation portion in a whole of an orthogonal direction orthogonal with a terminal axis direction of the crimping portion corresponding part; and
in the shaping process,
processing the crimping portion corresponding part processed in the high bending-rate processing process by shaping so that an orthogonal cross section orthogonal with a terminal axis direction becomes a circular shape.

4. The manufacturing method of a crimp terminal according to claim 3 , comprising:
setting at least a part of the deformation portion in an intermediate portion in the orthogonal direction of the crimping portion corresponding part; and
in the high bending-rate processing process,
bend processing the intermediate portion at a bending rate higher than a bending rate for plastically deforming the intermediate portion from the unprocessed shape into the predetermined bend processing shape.

5. The manufacturing method of a crimp terminal according to claim 2 , wherein
the terminal base material comprises a transition corresponding part provided continuously to the crimping portion corresponding part at a tip side in a terminal axis direction,
the manufacturing method comprising:
prior to the high bending-rate processing process,
performing an end-part raising process to raise an end part of the crimping portion corresponding part in the width direction and raising the transition corresponding part in a raising direction of the crimping portion corresponding part;
performing a bottom raising process to raise a bottom of the transition corresponding part simultaneously with the end-part raising of the crimping portion corresponding part and the transition corresponding part; and
after the bottom raising process, performing a cylindrical bend processing of a sealing portion corresponding part provided in a portion continuous with the crimping section in the transition corresponding part, together with a cylindrical bend processing of the crimping portion corresponding part.

6. The manufacturing method of a crimp terminal according to claim 5 , further comprising:
performing a process of inserting a core bar into the crimping portion corresponding part after the end parts of the crimping portion corresponding part are abutted with each other, in at least one process out of the high bending-rate processing process and the shaping process; and
performing a process of pressurizing the crimping portion corresponding part in a core-bar inserted state by a pressurizing mold.

7. The manufacturing method of a crimp terminal according to claim 6 , wherein a cross section of the core bar is in a circular shape, and
in the shaping process,
the manufacturing method comprises:
forming a cylindrical crimping section by a process of pressurizing from outside, by a pressurizing mold, the crimping portion corresponding part into which the core bar is inserted.

8. The manufacturing method of a crimp terminal according to claim 5 , wherein the sealing portion corresponding part is formed as a flat-shaped sealing portion by flattening the sealing portion corresponding part in a thickness direction.

9. The manufacturing method of a crimp terminal according to claim 2 , further comprising:
after the shaping process, performing a welding process of welding both ends of the crimping section in a peripheral direction along a terminal axis direction by a high-energy density heat source.

10. The manufacturing method of a crimp terminal according to claim 1 , further comprising:
after the shaping process, performing a welding process of welding both ends of the bend processing portion in a peripheral direction along a terminal axis direction by a high-energy density heat source.

11. A manufacturing method of a crimp terminal having a cylindrical crimping section, the manufacturing method comprising:
a high bending-rate processing process including
forming a sheet member by a sheet-shaped terminal base material comprising a crimping portion corresponding part which corresponds to the crimping section before a bend processing,
bend processing at least a part of a deformation portion to be plastically deformed into a predetermined bend processing shape in the crimping portion corresponding part, at a bending rate higher than a bending rate of plastically deforming the part from an unprocessed shape into a cylindrical shape, along with the bend processing of at least the crimping portion corresponding part of the terminal base material from the unprocessed shape into the cylindrical shape;
a shaping process of shaping, after the high bending-rate processing process, the crimping portion corresponding part processed in the high bending-rate processing process into the crimping section of the cylindrical shape such that each end part of the crimping portion corre

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Systems Inc

Inventors

• TERASHIMA Ryusuke
• Kuwabara Mikio
• Sakamoto Kentaro

Classifications

• H01R43/16 Primary

  for manufacturing contact members, e.g. by punching and by bending · CPC title

• H01R43/048

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

• H01R43/05

  with wire-insulation stripping · 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

• H01R4/183 Primary

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