JP2000068027A - Blanking method for female terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide spring characteristics required in preference to a specified spring portion by focusing difference of the spring characteristic due to the direction of a rolled plate material. SOLUTION: Female terminals 1A, 1B having an engagement portion 1a, in which a first spring portion 1c abuts to a male terminal 2 from the axial direction and an electrical connection portion 1b in which second spring portions 1d, 1e abut to a conductor 3a from the axially orthogonal direction are blanked from a rolled plate material 1C in a developing state. A spring characteristic in the rolling direction of the rolled plate material 1C differs from spring characteristics in the traverse direction orthogonal to this rolling direction, either of a spring characteristic required for the first spring portion 1c or spring characteristics required for the second spring portions 1d, 1e is preceded, and using as a standard a direction at which the spring characteristic of the preceded spring portion 1c, 1d, or 1e is provided, the female terminals 1A, 1B are blanked from the rolled plate material 1C in a developing state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stripping female terminals, which effectively utilizes spring characteristics that differ depending on the direction of a rolled sheet material.

[0002]

2. Description of the Related Art Generally, a female terminal used for a connector or the like has a fitting portion and an electric wire connecting portion, and a first spring portion is formed in the fitting portion to contact the male terminal from the axial direction. The connection part is formed with a second spring part that comes into contact with the conducting wire from a direction perpendicular to the axis.

The female terminal is a crimp terminal when the second spring portion is a barrel for crimping the conductor of the electric wire, and is a press contact terminal when the second spring portion is a press contact blade for pressing the conductor of the electric wire.

[0004] Each of the female terminals is stripped from a rolled plate made of copper or copper alloy in a developed state by a punching press.
Then, it is formed into a terminal shape by a bending press.

[0005]

However, the smaller the terminal, the smaller the size of each spring portion. Therefore, as the size of the spring portion decreases, the amount of deviation between the spring characteristics expected at the time of design and the actual spring characteristics increases. And it becomes difficult to obtain the spring characteristics required for each spring portion.

[0006] This means that the female terminal is punched out of a rolled plate made of copper or a copper alloy by a punching press in the unfolded state as described above. The spring characteristics in the traverse direction perpendicular to the rolling direction are slightly different, and it is considered that the directionality of the stripping is a major cause.

SUMMARY OF THE INVENTION Accordingly, the present invention is to provide a method for removing a female terminal, which is capable of obtaining a required spring characteristic by giving priority to a specific spring portion by focusing on a difference in spring characteristics depending on a direction of a rolled plate material. It is intended for.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a fitting portion and an electric wire connection portion, and the fitting portion has a first spring portion which comes into contact with a male terminal from an axial direction. Is formed,
A method in which a female terminal having a second spring portion that is in contact with a conductive wire in a direction perpendicular to the axis is stripped from a rolled plate material in an expanded state, and a spring characteristic in a rolling direction of the rolled plate material, The spring characteristic in the traverse direction orthogonal to the rolling direction is different, and the priority is given to one of the spring characteristic required for the first spring portion and the spring characteristic required for the second spring portion. A method for removing a female terminal from a rolled sheet material in a developed state with reference to a direction in which a spring characteristic of a portion is obtained is provided.

According to the present invention, focusing on the fact that the spring characteristics in the rolling direction of the rolled sheet material are different from the spring characteristics in the traverse direction perpendicular to the rolling direction, the first spring portion and the second spring portion are respectively provided. By giving priority to any of the required spring characteristics and removing the female terminal from the rolled plate material in the expanded state with reference to the direction in which the spring characteristic of the preferred spring portion is obtained, the spring required for the preferred spring portion is obtained. Characteristics can be obtained.

The female terminal may be a crimp terminal (claim 2) in which the second spring portion is a barrel for crimping the conductor of the electric wire, or a press contact terminal (in which the second spring portion is a press contact blade for press-contacting the conductor of the electric wire). Any of claim 3) may be used.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show a crimp terminal 1 according to a first embodiment.
A, and this crimp terminal 1A has a square cylindrical fitting portion 1a.
And a U-shaped electric wire connection portion 1b.

In the fitting portion 1a, U
A spring portion (first spring portion) 1c is formed in which the male terminal 2 fitted in the fitting portion 1a in the axial direction contacts the fitting portion 1a, and both sides of the wire connection portion 1b are formed. A barrel (second spring portion) 1d rising upward from above is formed. By winding the barrel 1d inward, the conductor 3a exposed at the tip of the electric wire 3 is crimped in a direction perpendicular to the axis. It has become.

The crimping terminal 1A is removed from a rolled plate 1C made of copper or copper alloy as shown in FIG. Then, the spring portion 1c is folded back at the valley fold line a by the bending press, and the fitting portion 1a is bent into a square tube shape at the valley fold lines b and c, thereby forming the crimp terminal 1A into a terminal shape.

FIGS. 3 and 4 show a press contact terminal 1 according to a second embodiment.
B, and the press contact terminal 1B is a square cylindrical fitting portion 1a.
And a U-shaped electric wire connection portion 1b.

In the fitting portion 1a, U
A spring portion (first spring portion) 1c is formed in which the male terminal 2 fitted in the fitting portion 1a in the axial direction contacts the fitting portion 1a, and both sides of the wire connection portion 1b are formed. A press-contact blade (second spring portion) 1e cut inwardly from above is formed, and by inserting the electric wire 3 into the press-contact blade 1e from above, the coating 3b of the electric wire 3 is cut off, and the conductor 3a is moved in the direction perpendicular to the axis. From the pressure.

The press contact terminal 1B is stripped from a rolled plate 1C made of copper or copper alloy as shown in FIG. Then, the spring portion 1c is folded back at the valley fold line a by the bending press, and the press-contact blade 1e is cut inward at the valley fold line e. Is formed into a terminal shape of the press contact terminal 1B.

The rolled sheet material 1C has different spring characteristics in the rolling direction and spring characteristics in the traverse direction orthogonal to the rolling direction. Table 1 shows an example of the spring characteristics of a rolled plate made of a copper alloy having a plate thickness of 0.6 mm.

[0019]

[Table 1]

As is clear from Table 1, the alloy number has a higher spring characteristic in the traverse direction than in the rolling direction because the tensile strength is larger and the elongation is smaller. The alloy number has a higher spring characteristic because the tensile strength is higher in the rolling direction than in the traverse direction. The alloy number KLF5 is a heat-resistant copper alloy containing tin (manufactured by Kobe Seisakusho).

In order to prioritize the spring characteristics of the spring portion 1c when removing the crimp terminal 1A from the rolled plate material 1C having the alloy number, as shown in the right side of FIG.
c is drawn along the traverse direction, and the barrel 1d is punched and pressed so as to be drawn along the rolling direction. vice versa,
When priority is given to the spring characteristics of the barrel 1d, as shown on the left side of FIG. 5, the barrel 1d is moved along the traverse direction,
The spring portion 1c is punched and pressed so as to be aligned with the rolling direction, and is stripped.

When it is desired to give priority to the spring characteristics of the spring portion 1c when removing the crimping terminal 1A from the rolled sheet material 1C having the alloy number, on the left side of FIG. As shown in the drawing, the spring portion 1c is arranged along the rolling direction and the barrel 1d is arranged along the traverse direction by punching and pressing to remove a plate. Conversely, when priority is given to the spring characteristics of the barrel 1d, as shown in the right side of FIG. 5, the barrel 1d is arranged along the rolling direction and the spring portion 1c is stamped and pressed so as to extend along the traverse direction. I do.

Similarly, when it is desired to prioritize the spring characteristics of the spring portion 1c when removing the press contact terminal 1B from the rolled plate material 1C having the alloy number, as shown on the right side of FIG.
c is arranged along the traverse direction, and the press contact blade 1e is punched and pressed so as to extend along the rolling direction, and the plate is removed. vice versa,
When priority is given to the spring characteristics of the press contact blade 1e, as shown on the left side of FIG. 6, the press contact blade 1e is moved along the traverse direction.
The spring portion 1c is punched and pressed so as to be aligned with the rolling direction, and is stripped.

Further, when it is desired to give priority to the spring characteristics of the spring portion 1c when removing the press contact terminal 1B from the rolled sheet material 1C having the alloy number, on the left side of FIG. As shown in the drawing, the spring portion 1c is arranged along the rolling direction, and the press contact blade 1e is arranged along the traverse direction. Conversely, when it is desired to prioritize the spring characteristics of the press contact blade 1e, as shown on the right side of FIG. Take a board.

As described above, in the crimp terminal 1A, one of the spring characteristics required for the spring portion 1c and the barrel 1d is given priority, and in the press contact terminal 1B, the spring portion 1c and the press contact blade 1e are required. Prioritizing any of the spring characteristics, the crimping terminal 1A and the pressing terminal 1B are stripped from the rolled sheet material 1C in an expanded state with reference to the direction in which the spring characteristic of the spring portion 1c or the barrel 1d or the pressing blade 1e is obtained. As a result, the preferred spring portion 1c or barrel 1
d or the spring characteristic required for the press contact blade 1e can be obtained.

[0026]

As is clear from the above description, the female terminal of the present invention focuses on the fact that the spring characteristics in the rolling direction of the rolled sheet material are different from the spring characteristics in the traverse direction perpendicular to the rolling direction. Then, by giving priority to one of the spring characteristics required for the first spring portion and the second spring portion, the female terminal is expanded from the rolled plate material in the deployed state with reference to the direction in which the spring characteristic of the preferred spring portion is obtained. With this arrangement, the spring characteristics required for the preferential spring portion can be obtained.

[Brief description of the drawings]

FIG. 1 is a crimp terminal according to a first embodiment of the present invention,
(A) is a perspective view, (b) is a side sectional view of a spring portion, (c)
FIG. 3 is a front sectional view of a barrel.

FIG. 2 is a development view of a crimp terminal.

FIG. 3 is a press contact terminal according to a second embodiment of the present invention,
(A) is a perspective view, (b) is a side sectional view of a spring portion, (c)
FIG. 3 is a front sectional view of the press contact blade.

FIG. 4 is a development view of a press contact terminal.

FIG. 5 is a plan view of an example of removing a crimp terminal.

FIG. 6 is a plan view of an example of removing a press contact terminal.

[Description of Signs] 1A Crimping terminal 1B Pressure contact terminal 1C Rolled plate material 1a Fitting portion 1b Electric wire connection portion 1c Spring portion (first spring portion) 1d Barrel (second spring portion) 1e Pressure contact blade (second spring portion) 2 Male Terminal 3 Electric wire 3a Conductor

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Nei Saito 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5E063 GA01

Claims (3)

[Claims] A first spring portion that has a fitting portion and an electric wire connection portion, the first spring portion being in contact with the male terminal from the axial direction;
A method in which a female terminal having a second spring portion that is in contact with a conductive wire in a direction perpendicular to the axis is stripped from a rolled plate material in an expanded state, and a spring characteristic in a rolling direction of the rolled plate material, The spring characteristics in the traverse direction perpendicular to this rolling direction are different,
Prioritizing one of the spring characteristics required for the first spring portion and the spring characteristics required for the second spring portion, the female terminal is expanded in a deployed state based on the direction in which the spring characteristic of the preferred spring portion is obtained. A method for removing female terminals, comprising removing from a rolled sheet material. 2. The method for removing a female terminal according to claim 1, wherein the female terminal is a crimp terminal in which the second spring portion is a barrel for crimping a conductor of an electric wire. 3. The method for removing a female terminal according to claim 1, wherein the female terminal is a pressure contact terminal in which the second spring portion is a pressure contact blade for pressing a conductor of an electric wire.