JPH07201375A - Crimp terminal and its manufacture - Google Patents

Abstract

PURPOSE:To provide a crimp terminal capable of surely and firmly performing connection when a cable end part is inserted in a cable connection tube part to be crimped from an outer periphery. CONSTITUTION:A belt-like metal plate raw material A chainlikely formes a cable connection tube part 1a, wherein a groove having a V-shaped cross section is formed on an upper end along an axis direction by the abutting of the bent end edge part of the raw material A, through the rapping and squeezing processes of a first composite press device B. A silver solder inserting insertion hole penetrates vertically in the middle part of the groove in this forming process, and a rodlike silver solder 2 cut into an appropriate length is inserted into this insertion hole. Then the metal plate raw material A wherein the cable connection tube part 1a is chainlikely formed is sent to a soldering device to heat-melt the silver solder 2 to embed the V-shaped groove. Then outer shape extraction is performed for the metal plate raw material A at a second press device to manufacture a crimp terminal having the cable connection tube part 1a, wherein the V-shaped groove is embedded by the silver solder 2, and a connecting tip part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal crimping terminal having a tubular portion for connecting the ends of electric wires and a fork-shaped, ring-shaped or plate-shaped connecting tip for connecting to a desired device. The present invention relates to a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, this type of metal crimp terminal, that is, FIG.
A tube part (10a) for connecting the wire ends, as shown in
Further, the metal crimp terminal (10) having the connecting tip portion (10b) for connecting to a desired device is manufactured by pressing from a metal plate material. In this case, since the tubular portion (10a) is formed by bending the plate material upward in a round shape, the joining portion at the upper end is a groove having a V-shaped cross section by the left and right end faces.
(10c) is inevitably formed along the axial direction. Such a groove (10c) causes a flaw in a complete ring shape in the cross-sectional shape of the tubular portion (10a), and when the wire end is inserted into the tubular portion (10a) and crimped from the outer periphery, the groove (10c) is formed. Since there is a defect that the parts are separated right and left and complete electrical or mechanical connection may not be possible, conventionally, the groove (10c) was filled with silver wax (10d).

[0003]

However, in order to fill the groove of each crimp terminal with silver wax with an automatic machine, a feeder for aligning and moving the crimp terminals with the groove facing upward is required. The equipment was very expensive because it required a robot mechanism that melted and poured silver wax into the groove. In addition, since the crimp terminal which is once manufactured by pressing is poured with silver wax by secondary processing, the workability is poor and the production cost is high.

Therefore, a first object of the present invention is to perform a series of press working steps by incorporating a means for pouring silver wax into a groove in a press working process for forming a crimp terminal from a metal plate material. It is an object of the present invention to provide a manufacturing method suitable for mass production, which is capable of obtaining a crimp terminal having an electric wire connection tube portion in which a V-shaped groove is filled with melt-hardened silver wax and a tip portion for connecting to a desired device. .

A second object of the present invention is to form a vertically penetrating hole in the middle portion of the V-shaped groove before pouring the silver wax, so that the melt-hardened silver wax is formed in the groove. When the tube is crimped, the groove part is surely prevented from separating to the left and right when the tube is crimped, and the hole marks serve as a guide for the crimping point. An object of the present invention is to provide a crimp terminal that can improve the property.

[0006]

The structure of the present invention for achieving this object will be described with reference to the reference numerals corresponding to the embodiments. The present invention is made of a metal formed by pressing a metal plate material. A terminal, which has an electric wire connection tube portion (1a) and a tip portion (1b) for connecting to a device,
In a crimp terminal (1) in which a groove (1c) having a V-shaped cross section is formed along the axial direction of the cylindrical portion by the contact of the bent edge portion of the plate material at the upper end of (1a), the V-shaped groove (1c) ) Has a hole (1d) penetrating vertically formed in it, and the hole (1d) and the V-shaped groove (1c) are filled with melt-hardened silver wax (2). The section (1a) has a structure in which its sectional shape is formed of a complete ring body having no cutout.

Further, in the present invention, the crimp terminal (1)
As a means for manufacturing, a strip-shaped metal plate material (A) is sent to the first composite press machine (B), sequentially subjected to a die-cutting and pressing-bending process, and a cross-section V is formed by abutting the bent edge portions of the plate material. A wire-connection tube (1a) with a V-shaped groove (1c) formed at the upper end along the axial direction is formed into a chain shape, and silver wax is inserted in the middle of the groove (1c) in this tube forming process. Insertion hole for
(1d) is formed by penetrating up and down, and a rod-shaped silver wax (2) cut into an appropriate length is inserted into this insertion hole (1d), and then this wire connection tube portion (1a) is chained. The metal plate material (A) formed into a shape is sent to the brazing device (C) to heat and melt the silver wax (2) to fill the V-shaped groove (1c), and then the metal plate material (A) It is sent to the second press device (D), the outer shape is removed, and the V-shaped groove (1c) is filled with the melt-hardened silver wax (2) to connect the electric wire connection cylinder part (1a) to the desired device. Provided is a method for producing a crimp terminal (1) having a tip (1b) for use.

[0008]

According to the present invention, the insertion hole (1) for inserting the silver wax is formed in the middle portion of the groove in the molding process of the cylindrical portion (1a) by the compound press machine.
d) is formed by penetrating up and down, and a rod-shaped silver wax (2) cut into an appropriate length is inserted into this insertion hole, and then the wire connection tube portion (1a) is formed in a chain shape. Metal plate material (A)
To the brazing device (C) to heat and melt the silver wax,
Since the product is completed by embedding the V-shaped groove (1c) and finally removing the outer shape, the melting process of silver wax can be automatically performed according to the flow of press working of the metal plate material. The V-shaped groove (1c) is filled with melt-hardened silver wax and the wire connecting tube (1a) and the tip (1b) for connecting to a desired device are continuously connected to form an excellent crimp terminal. It can be mass-produced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on the embodiments shown in the drawings. FIG. 4 is a perspective view showing an embodiment of the crimp terminal according to the present invention, and FIGS. 1 to 3 show the manufacturing process thereof. This crimp terminal (1) is manufactured by press working from a metal plate material, and has an electric wire connection tube part (1a) and a tip part (1b) for connecting to a device, and the electric wire connection tube part A groove (1c) having a V-shaped cross section is formed at the upper end of (1a) by abutting the bent edge portion of the plate material along the axial direction of the tubular portion. The groove (1c) is filled with the melt-hardened silver wax (2), so that the electric wire connecting tubular portion (1a) is formed as a complete ring body having no cutout in its cross-sectional shape. Incidentally, in the above embodiment, the tip end side (1b) for connecting to the device is formed into a bifurcated fork.
The figure-shaped terminals are shown.

The crimp terminal (1) constructed as described above is shown in FIG.
As shown in Fig. 4, insert the core end (k) of the wire (K) with the sheath of the wire (K) removed into the wire connection tube (1a) and crimp the tube (1a) from the outer periphery to the wire (K) and crimp terminal. Used by connecting and connecting (1). At this time, since the V-shaped groove (1c) of the tubular portion (1a) is filled with the melt-hardened silver wax (2), the tubular portion (1a) is a complete ring body having no cutout in its cross-sectional shape. With this structure, when the end of the electric wire is inserted into the tubular portion and crimped from the outer periphery, the electric wire can be surely and firmly connected without the groove portion separating. In particular, in the crimp terminal (1) of the present invention, a vertical hole (1d) is formed in the middle portion of the V-shaped groove (1c) before pouring the silver wax, whereby melt hardening is achieved. The silver wax is hardened in a complicated shape in the groove (1c) and hardened so that it is not easily separated.Therefore, the groove (1c) is surely prevented from separating to the left and right when the cylinder is crimped. When the cylindrical portion (1a) is crimped by the crimping tool, the hole traces serve as a guide for the crimped portion, and the workability can be improved.

The above crimp terminal is manufactured by the process shown in FIGS. In FIG. 1, the lower part shows the arrangement of the devices used in the method of the present invention, and the upper part shows the manufacturing sequence of the metal plate material (A) which is sequentially fed into these devices and processed. The portions surrounded by the one-dot chain line A) indicate the work areas of the lower apparatus connected by arrows. Thus, in the present invention, a strip-shaped metal plate material (A) having an appropriate thickness and width is sent to the first composite press machine (B) and sequentially subjected to the die cutting and pressing and bending steps as shown in FIG. As shown in FIG. 3, a wire connection tube portion (1a) having a groove (1c) having a V-shaped cross section formed at the upper end along the axial direction is formed in a chain shape by abutting the bent edge portion of the plate material. . In the embodiment, the electric wire connection tube portions (1a) are alternately formed on the left and right sides of the metal material (A) to reduce production efficiency and waste of material, but it may be formed on any one side portion. Good.

In the tube forming step, an insertion hole (1d) for inserting the silver wax is formed vertically through the middle portion of the groove (1c), and the insertion hole (1d) has an appropriate length. Insert the stick-shaped silver wax (2) cut into. As shown in FIG. 2, the silver wax (2) is cut into a proper size by a silver wax supply device (E) having a linear one incorporated in the first composite press device (B), and the insertion hole (1d ).

Next, the metal plate material (A) in which the electric wire connecting cylinder portions (1a) are formed in a chain shape is sent to a brazing device (C) and the inserted silver wax (2) is heated and melted to V. V-shaped groove (1c)
Completely embed. After that, the metal plate material (A) is sent to the second press device (D) to perform outline cutting, and the V-shaped groove (1c) is filled with the melt-hardened silver wax (2) to form a wire connection tube. A crimp terminal (1) including a part (1a) and a tip (1b) for connecting to a desired device is sequentially manufactured.

In the above embodiment, the number of the insertion holes (1d) formed in the wire connecting cylinder portion (1a) is not specified. For example, in FIG.
As shown in Fig. 2, two holes may be formed and silver wax (2) and (2) may be inserted into these insertion holes (1d) and (1d) respectively, or the number may be increased if necessary. Good. Also crimp terminals
The shape of the connecting tip (1b) in (1) should also be changed to a ring-shaped one as shown in FIG. 7, a plate-shaped one as shown in FIG. 8, or any other form. Is possible.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, and has the constitutional requirements referred to in the present invention and the present invention. The above-mentioned objects can be achieved and appropriately modified within the scope of the following effects.

[0016]

As is apparent from the above description, the present invention is characterized in that the V-shaped groove (1c) of the wire connecting tube portion (1a) is filled with the melt-hardened silver wax (2). The section (1a) is configured as a complete ring body with no cutout in its cross-sectional shape, which allows the wire to be securely and firmly attached without the grooves separating when the wire end is inserted into this tube and crimped from the outer periphery. In particular, in the crimp terminal (1) of the present invention, it is possible to connect the above-mentioned V before pouring the silver wax.
By forming a vertically penetrating hole (1d) in the middle of the V-shaped groove (1c), the melt-hardened silver wax is formed into the groove (1c).
Since it is hardened in a complicated shape and is joined so as not to be easily separated, it surely prevents the groove part (1c) from separating to the left and right when crimping the tube part, and at the same time, crimps the tube part (1a). By the above, when the pressure is applied, the hole traces serve as a guide for the pressure applied portion, and the workability can be improved.

Further, according to the present invention, an insertion hole for inserting a silver wax is formed vertically through an intermediate portion of a groove in a cylindrical portion forming step by a compound press machine, and the insertion hole has an appropriate length. After inserting the cut rod-shaped silver wax into the brazing machine, the metal plate material with the wire connection tube formed in a chain shape is sent to the brazing device to heat and melt the silver wax to fill the V-shaped groove, and finally to remove the outer shape. Since the product is completed by performing the process, the melting process of the silver wax can be automatically performed according to the flow of the press working of the metal plate material, and thus the V-shaped groove can be formed by the melt-hardened silver wax. It is possible to continuously mass-produce an excellent crimp terminal having a buried electric wire connection tube portion and a tip end portion for connection to a desired device with a simple device.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a method for manufacturing a crimp terminal according to the present invention.

FIG. 2 is a cross-sectional view of the metal plate material in the first composite press device portion of the above method.

FIG. 3 is a perspective view showing a process of the electric wire connection tubular portion manufactured by the above method.

FIG. 4 is a perspective view showing an embodiment of a crimp terminal according to the present invention.

FIG. 5 is a cross-sectional view showing a usage example of the crimp terminal.

FIG. 6 is a perspective view similar to FIG. 3, showing another embodiment of the electric wire connection tubular portion.

FIG. 7 is a perspective view showing another example of the crimp terminal according to the present invention.

FIG. 8 is a perspective view showing still another example of the crimp terminal according to the present invention.

FIG. 9 is a perspective view showing a conventional crimp terminal.

[Explanation of symbols]

 (1) Crimp terminal (1a) Wire connection tube (1b) Connecting tip (1c) Groove (1d) Insert hole (2) Silver wax (A) Metal plate material (B) First compound press (C) ) Brazing equipment (D) Second press equipment

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[Procedure amendment]

[Submission date] June 6, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title: Crimp terminal and method of manufacturing the same

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal crimping terminal having a tubular portion for connecting the ends of electric wires and a fork-shaped, ring-shaped or plate-shaped connecting tip for connecting to a desired device. The present invention relates to a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, this type of metal crimp terminal, that is, FIG.
As shown in Fig. 10, a cylindrical portion (10
a) and a connecting tip (10) for connecting to a desired device.
The metal crimp terminal (10) including b) is manufactured by pressing a metal plate material. In this case, since the tubular portion (10a) is formed by bending the plate material upward in a round shape, the joint portion at the upper end of the tubular portion (10a) necessarily has a groove (10c) having a V-shaped cross section formed by the left and right end faces along the axial direction. Formed. Such a groove (10c) is formed in the tubular portion (10a).
In the cross-sectional shape of the
When the wire end portion is inserted into the tubular portion (10a) and crimped from the outer periphery, the groove (10c) portion is separated into left and right parts, which may cause a failure in complete electrical or mechanical connection. Conventionally, the groove (10c) was filled with silver wax (10d) by pouring.

[0003]

However, in order to fill the groove of each crimp terminal with silver wax with an automatic machine, a feeder for aligning and moving the crimp terminals with the groove facing upward is required. The equipment was very expensive because it required a robot mechanism that melted and poured silver wax into the groove. In addition, since the crimp terminal which is once manufactured by pressing is poured with silver wax by secondary processing, the workability is poor and the production cost is high.

Therefore, a first object of the present invention is to perform a series of press working steps by incorporating a means for pouring silver wax into a groove in a press working process for forming a crimp terminal from a metal plate material. It is an object of the present invention to provide a manufacturing method suitable for mass production, which is capable of obtaining a crimp terminal having an electric wire connection tube portion in which a V-shaped groove is filled with melt-hardened silver wax and a tip portion for connecting to a desired device. .

A second object of the present invention is to form a vertically penetrating hole in the middle portion of the V-shaped groove before pouring the silver wax, so that the melt-hardened silver cicada is formed in the groove. When the tube is crimped, the groove part is surely prevented from separating to the left and right when the tube is crimped, and the hole marks serve as a guide for the crimping point. An object of the present invention is to provide a crimp terminal that can improve the property.

[0006]

The structure of the present invention for achieving this object will be described with reference to the reference numerals corresponding to the embodiments. The present invention is made of a metal formed by pressing a metal plate material. A terminal, which has a wire connection tube portion (1a) and a tip portion (1b) for connection to a device, and is cross-sectioned by abutting a bent edge portion of a plate material on an upper end of the wire connection tube portion (1a). In the crimp terminal (1) in which the V-shaped groove (1c) is formed along the axial direction of the tubular portion, a vertically penetrating hole (1d) is formed in an intermediate portion of the V-shaped groove (1c). The hole (1d) and the V-shaped groove (1c) are filled with the melt-hardened silver wax (2), whereby the electric wire connecting tubular portion (1a) is formed as a complete ring body without a cutout in its cross-sectional shape. It has a structure that is used.

Further, in the present invention, as a means for manufacturing the crimp terminal (1), a strip-shaped metal plate material (A) is used.
Is sent to the first composite press machine (B) and sequentially subjected to die-cutting and push-bending steps, and the groove (1c) having a V-shaped cross section is abutted to the upper end along the axial direction by the contact of the bent edge portions of the plate material. The formed wire connection tube portion (1a) is formed into a chain shape, and in the tube portion forming step, an insertion hole (1d) for inserting the silver wax is formed vertically through the middle portion of the groove (1c). In advance, a rod-shaped silver wax (2) cut into an appropriate length is inserted into the insertion hole (1d), and then the electric wire connecting tubular portion (1a) ... Is formed in a chain-like metal plate material (A). To the brazing device (C) to heat and melt the silver wax (2) to fill the V-shaped groove (1c), and then to feed the metal plate material (A) to the second press device (D) to draw the outer shape. And the V-shaped groove (1c) was filled with melt-hardened silver wax (2). There is provided a method for producing a crimp terminal (1) having connecting tip of the wire connecting tube portion and (1a) to the desired device and (1b).

[0008]

According to the present invention, the cylindrical portion (1a) of the composite press machine is used.
In the molding step of (1), an insertion hole (1d) for inserting a silver wax is vertically formed in the middle portion of the groove, and a rod-shaped silver wax (2) cut into an appropriate length is formed in the insertion hole. Insert, then send the metal plate material (A) in which the wire connection tube portion (1a) is formed in a chain to the brazing device (C) to heat and melt the silver wax to fill the V-shaped groove (1c). Since the outline is punched out to complete the product, the melting process of the silver wax can be automatically performed along with the flow of the press working of the metal plate material, which results in the V-shaped groove (1c). Wire connection tube (1) filled with melt-hardened silver wax
It is possible to continuously mass-produce an excellent crimp terminal having a) and a tip (1b) for connecting to a desired device.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on the embodiments shown in the drawings. FIG. 4 is a perspective view showing an embodiment of the crimp terminal according to the present invention, and FIGS. 1 to 3 show the manufacturing process thereof. This crimp terminal (1) is manufactured by pressing from a metal plate material, and has a wire connection tube portion (1a) and a tip portion (1) for connection to a device.
b) and having a V-shaped cross section (1
c) is formed along the axial direction of the tubular portion. The groove (1c) is filled with the melt-hardened silver wax (2), so that the wire connection cylinder (1a) is formed as a complete ring body having no cutout in its cross-sectional shape. In the above embodiment, the tip side (1
b) shows a U-shaped terminal formed in the shape of a bifurcated fork.

The crimp terminal (1) constructed as described above is shown in FIG.
As shown in Fig. 3, the core portion (k) of the electric wire (K) from which the coating of the electric wire (K) has been removed is inserted into the electric wire connection tubular portion (1a), and the tubular portion (1a)
Is used by connecting the electric wire (K) and the crimp terminal (1) by crimping from the outer periphery. At this time, V of the tubular portion (1a)
Since the character-shaped groove (1c) is filled with the melt-hardened silver wax (2), the tubular portion (1a) is configured as a complete ring body without a cutout in its cross-sectional shape, whereby the end of the wire is It is possible to securely and firmly connect the electric wire without separating the groove portion when it is inserted into the portion and crimped from the outer periphery. In particular, in the crimp terminal (1) of the present invention, a hole (1d) penetrating vertically is formed in the middle portion of the V-shaped groove (1c) before pouring the silver wax, whereby the melt hardening is achieved. Since the formed silver wax is hardened in the groove portion (1c) in a complicated manner and hardened so as not to be easily separated, the groove portion (1c) is surely prevented from being separated left and right when the cylinder portion is pressure-bonded. When the cylindrical portion (1a) is crimped by the crimping tool, the hole traces serve as a guide for the crimping portion, and the workability can be improved.

The above crimp terminal is manufactured by the process shown in FIGS. In FIG. 1, the arrangement of the devices used in the method of the present invention is shown in the lower part, and the manufacturing order of the metal plate material (A) sequentially fed into these devices to be processed is shown in the upper part. The portions surrounded by the one-dot chain line in A) indicate the work areas of the lower apparatus connected by arrows. Thus, in the present invention, a strip-shaped metal plate material (A) having an appropriate thickness and width is sent to the first composite press machine (B) and sequentially subjected to die-cutting and pushing-bending steps as shown in FIG. As shown in FIG. 3, a wire connection tube portion (1a) having a groove (1c) having a V-shaped cross section formed at the upper end along the axial direction is formed in a chain shape by abutting the bent edge portion of the plate material. . In the embodiment, the electric wire connection tubular portions (1a) are alternately formed on the left and right sides of the metal material (A) to save the production efficiency and waste of the material, but it may be formed on any one side portion. Good.

The groove (1c) in the cylindrical portion forming step.
An insertion hole (1d) for inserting a silver wax is vertically formed at an intermediate portion of the above, and a rod-shaped silver wax (2) cut into an appropriate length is inserted into the insertion hole (1d). As shown in FIG. 2, this silver wax (2) is cut into a proper size by a silver wax supply device (E) in which a linear one is incorporated in the first composite press device (B), and the insertion hole (1d) is cut. ) Is plugged in.

Then, the metal plate material (A) in which the electric wire connecting cylinder portions (1a) are formed in a chain shape is sent to a brazing device (C), and the inserted silver wax (2) is heated and melted to form a V shape. The groove (1c) is completely filled. After that, the metal plate material (A) is sent to the second press device (D) to perform external shape cutting, and the V-shaped groove (1c) is filled with the melt-hardened silver wax (2) to form a wire connection tube. A crimping terminal (1) having a part (1a) and a tip (1b) for connecting to a desired device is sequentially manufactured.

In the above embodiment, the electric wire connecting tube portion (1
The number of insertion holes (1d) formed in a) is not specified.
For example, as shown in FIG. 6, two holes may be formed and silver wax (2) and (2) may be inserted into these insertion holes (1d) and (1d), respectively, or the number may be changed as necessary. You may increase. In addition, the connecting tip (1) of the crimp terminal (1)
The shape of b) can also be changed to a ring shape as shown in FIG. 7, a plate shape as shown in FIG. 8, or any other arbitrary shape.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, and has the constitutional requirements referred to in the present invention and the present invention. The above-mentioned objects can be achieved and appropriately modified within the scope of the following effects.

[0016]

As is apparent from the above description, the present invention is characterized in that the V-shaped groove (1c) of the wire connecting tube portion (1a) is filled with the melt-hardened silver wax (2). The portion (1a) is configured as a complete ring body having no cutout in its cross-sectional shape, whereby the electric wire can be securely and firmly attached without the groove portion separating when the end portion of the electric wire is inserted into this tubular portion and crimped from the outer periphery. In particular, in the crimp terminal (1) of the present invention, a hole (1d) vertically passing through the middle portion of the V-shaped groove (1c) before pouring the silver wax is possible. Since the melt-hardened silver wax is complicatedly entered into the groove (1c) and hardened so as not to be easily separated, the groove (1c) portion is left and right when the tube is crimped. Surely prevent it from separating into The hole mark when a (1a) for crimping by a crimping tool is one that can enhance the workability becomes a measure of the pressure point.

Further, according to the present invention, an insertion hole for inserting a silver wax is formed vertically through an intermediate portion of a groove in a cylindrical portion forming step by a compound press machine, and the insertion hole has an appropriate length. Insert the cut rod-shaped silver wax, and then send the metal plate material with the wire connection tube formed in a chain to the brazing device to heat and melt the silver wax to fill the V-shaped groove,
Finally, since the product is completed by removing the outer shape, the melting process of the silver wax can be automatically performed according to the flow of the press working of the metal plate material, whereby the V-shaped groove is melt-hardened. It is possible to continuously mass-produce an excellent crimp terminal having an electric wire connection tube portion filled with the above-mentioned silver wax and a tip end portion for connection to a desired device with a simple device.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a method for manufacturing a crimp terminal according to the present invention.

FIG. 2 is a cross-sectional view of the metal plate material in the first composite press device portion of the above method.

FIG. 3 is a perspective view showing a process of the electric wire connection tubular portion manufactured by the above method.

FIG. 4 is a perspective view showing an embodiment of a crimp terminal according to the present invention.

FIG. 5 is a cross-sectional view showing a usage example of the crimp terminal.

FIG. 6 is a perspective view similar to FIG. 3, showing another embodiment of the electric wire connection tubular portion.

FIG. 7 is a perspective view showing another example of the crimp terminal according to the present invention.

FIG. 8 is a perspective view showing still another example of the crimp terminal according to the present invention.

FIG. 9 is a perspective view showing a conventional crimp terminal.

[Explanation of symbols] (1) Crimp terminal (1a) Electric wire connecting tube (1b) Connecting tip (1c) Groove (1d) Insert hole (2) Silver wax (A) Metal plate material (B) First Compound press machine (C) Brazing machine (D) Second press machine

Claims (2)

[Claims] 1. A metal terminal formed by pressing a metal plate material by press working, comprising a wire connection tube portion (1a) and a tip end portion (1b) for connecting to a device, and said wire connection tube portion (1). 1a)
In the crimp terminal (1) in which a groove (1c) having a V-shaped cross section is formed along the axial direction of the cylindrical portion by the contact of the bent edge portion of the plate material at the upper end of the V-shaped groove (1c) A hole (1d) penetrating vertically is formed in the portion, and the hole (1d) and the V-shaped groove (1
c) is filled with melt-hardened silver wax (2),
As a result, the crimp terminal in which the wire connecting tube portion (1a) is formed of a complete ring body having no cutout in its cross-sectional shape. 2. A strip-shaped metal plate material (A) is fed into a first composite press machine (B), sequentially subjected to a die-cutting and press-bending process, and a V-shaped section is formed by abutting the bent edge portions of the plate material. Wire connection tube with groove (1c) formed at the top along the axial direction
(1a) is formed into a chain shape, and in this cylindrical portion forming step, an insertion hole (1d) for inserting silver wax is formed vertically through the middle portion of the groove (1c), and the insertion hole ( A rod-shaped silver wax (2) cut into an appropriate length is inserted into 1d), and then a metal plate material (A) in which this electric wire connection tubular portion (1a) is formed in a chain shape is brazed by a brazing device (C). And melt it by heating to melt the silver wax (2).
The V-shaped groove (1c) is melted and hardened and the V-shaped groove (1c) is melted and hardened, and the V-shaped groove (1c) is melted and hardened. A method for producing a crimp terminal (1) having an electric wire connection tube portion (1a) filled with a wire and a tip portion (1b) for connecting to a desired device.