JP2021185556A - Terminal-equipped wire, manufacturing method of terminal-equipped wire, and manufacturing apparatus of terminal-equipped wire - Google Patents

Abstract

To improve anticorrosion performance.SOLUTION: A terminal-equipped wire includes an electric wire 10, a terminal fitting 20, and a water blocking member 30 for suppressing the ingress of liquid into a connection portion between the electric wire 10 and the terminal fitting 20. The water blocking member 30 includes a solder water blocking unit 31 that is formed in a gap G between strands 13 of a core wire 11 between at least the position of a connecting body 25 of the terminal fitting 20 and the position of the rear end of a covering connecting body 24, and suppresses the inflow of liquid into the gap G, and a resin water blocking unit 32 that is made of a curable resin material and covers an exposed core wire portion 11a of an electric wire terminal 10a from the outside together with a core wire connecting body 23 and the covering connecting body 24 of the terminal fitting 20 to prevent the liquid from adhering to the exposed core wire portion 11a from the outside.SELECTED DRAWING: Figure 3

Description

The present invention relates to an electric wire with a terminal, a method for manufacturing an electric wire with a terminal, and an apparatus for manufacturing an electric wire with a terminal.

Conventionally, some electric wires with terminals are provided with anticorrosion treatment on the terminal of the electric wire (hereinafter referred to as "electric wire terminal") and the electric wire connection body of the terminal fitting crimped to the electric wire terminal. For example, in Patent Document 1 below, a conductive water blocking agent is previously impregnated into the gap between the wires of the exposed core wire of the electric wire terminal and then solidified, and the terminal metal fitting is crimped to the electric wire terminal. The electric wire with a terminal is disclosed. Further, Patent Document 2 below discloses an electric wire with a terminal in which a terminal fitting is crimped and crimped to an electric wire terminal in which the strands of the exposed core wire are previously connected by soldering. In Patent Document 2, the exposed core wire portion is immersed in the molten solder, and the molten solder is infiltrated into the gap between the strands of the exposed core wire portion by applying ultrasonic vibration to the molten solder. Further, Patent Documents 3 and 4 below disclose an electric wire with a terminal in which an electric wire terminal and an electric wire connection body of a terminal fitting are covered with a first resin, and the first resin is further covered with a second resin.

Japanese Unexamined Patent Publication No. 2008-293848 Japanese Unexamined Patent Publication No. 2011-222406 Japanese Unexamined Patent Publication No. 2011-238500 Japanese Unexamined Patent Publication No. 2014-120283

By the way, in the conventional electric wire with a terminal, a conductive water blocking agent or solder is solidified in advance in the gap between the strands of the exposed core wire, so that when the terminal fitting is crimped, the conductive water blocking agent or There is a possibility that a gap will be created in the solder and the anticorrosion performance will be reduced.

Therefore, an object of the present invention is to provide an electric wire with a terminal, a method for manufacturing the electric wire with a terminal, and an apparatus for manufacturing the electric wire with a terminal, which can improve the anticorrosion performance.

In order to achieve the above object, the electric wire with a terminal according to the present invention is attached to the electric wire terminal having a core wire composed of a plurality of strands, an electric wire having a coating covering other than the exposed core wire portion of the electric wire terminal, and the electric wire terminal. The terminal fitting is provided with a water-stopping member for suppressing the infiltration of liquid into the connection portion between the electric wire and the terminal fitting, and the terminal fitting is physically and electrically with respect to the exposed core wire portion. The core wire connection body connected to the wire terminal, the coating connection body crimped and crimped to the coating end portion of the coating in the electric wire terminal, and the core wire connection body and the coating connection body are connected at intervals. It has a connecting body that exposes the exposed core wire portion from between the core wire connecting body and the coated connecting body, and the water blocking member is at least from the position of the connecting body to the connecting body side of the covering connecting body. It is made of a solder water stop part that is formed of solder in the gap between the strands of the core wire up to the rear end position on the opposite side of the tip position and suppresses the inflow of liquid into the gap, and a curable resin material. It is characterized by having a resin water blocking portion that covers the exposed core wire portion from the outside together with the core wire connecting body and the coated connecting body and suppresses the adhesion of liquid from the outside to the exposed core wire portion.

Here, it is desirable that the wire and the terminal fitting are made of metal materials having different ionization tendencies.

Further, in order to achieve the above object, in the method for manufacturing an electric wire with a terminal according to the present invention, a core wire composed of a plurality of strands, an electric wire terminal of an electric wire having a coating covering the core wire, and the electric wire terminal are placed on an inner wall surface. The wire connector of the terminal fitting to be placed is pressed while being sandwiched between the first mold and the second mold, and the core wire connector in the wire connector is crimped to the exposed core wire portion of the wire terminal. Further, a crimping step of crimping and crimping a coated connection body connected to the core wire connecting body of the electric wire connecting body via a connecting body to the coated terminal portion of the coating of the electric wire terminal, and after crimping and crimping. The solder application step of applying the solder paste to the exposed portion from the electric wire connection body in the core wire exposed portion, and the solder paste is melted, and the molten solder is at least from the position of the connection body to the connection body side in the coating connection body. The solder water stop forming step of forming the solder water stop portion that has been solidified after being infiltrated into the gap between the strands of the core wire up to the rear end position on the opposite side of the tip position of the nozzle, and the ejection of the nozzle tip. The curable resin material is discharged from the outlet, and the exposed core wire portion, the core wire connecting body, and the coated connecting body in which the solder water blocking portion is formed in the gap between the strands are outwardly formed by the curable resin material. It is characterized by having a resin supply step of covering from a cable, and a resin water stop forming step of operating a resin curing device to form a resin water stop portion obtained by curing the curable resin material.

Here, in the solder coating step, it is desirable to apply the solder paste to the exposed portion exposed from the opening of the connecting body.

Further, the solder coating step includes an oxide film removing step of removing an oxide film on the surface of the wire made of aluminum or an aluminum alloy in the exposed portion of the core wire exposed portion after crimping and crimping, and the solder coating step is the oxide film. It is desirable to perform it after performing the removal step.

Further, in order to achieve the above object, in the electric wire manufacturing apparatus with a terminal according to the present invention, a core wire composed of a plurality of strands, an electric wire terminal of an electric wire having a coating covering the core wire, and the electric wire terminal are placed on an inner wall surface. It is provided with a first mold and a second mold for arranging the wire connection body of the terminal fitting to be placed, and pressurizes the wire terminal and the wire connection body while sandwiching them between the first mold and the second mold. Then, the core wire connecting body in the electric wire connecting body is crimped and crimped to the exposed core wire portion of the electric wire terminal, and the coating is connected to the core wire connecting body in the electric wire connecting body via the connecting body. A crimping machine that crimps and crimps the connection body to the coated terminal portion of the coating in the wire terminal, and a solder coating machine that applies solder paste to the exposed portion from the wire connection body in the core wire exposed portion after crimping and crimping. , The solder paste is melted, and the molten solder is melted at least from the position of the connecting body to the rear end position on the side opposite to the tip position on the connecting body side in the coated connection body, and the gap between the strands of the core wire. It is equipped with a solder water stop forming device that forms a solder water stop that is solidified after being infiltrated into the wire, and a nozzle that discharges the curable resin material from the discharge port at the tip of the nozzle. A resin feeder that covers the core wire exposed portion, the core wire connection body, and the coating connection body from which the water portion is formed from the outside with the curable resin material, and a resin curing device that cures the curable resin material. It is characterized by having.

In the method for manufacturing an electric wire with a terminal and the apparatus for manufacturing an electric wire with a terminal according to the present invention, the solder paste applied to the exposed portion of the exposed core wire after crimping is melted, and this molten solder is melted between the strands of the core wire. Since it is infiltrated into the gap and then solidified, the electric wire with a terminal is provided with a solder water blocking portion filled in all the gaps between the strands. Then, in the method for manufacturing an electric wire with a terminal and the apparatus for manufacturing an electric wire with a terminal, after forming the solder water blocking portion, a curable resin material is supplied from above so as to cover the exposed core wire portion, and this curing is performed. By curing the sex resin material, the electric wire with a terminal is provided with a resin water-stopping portion that covers the exposed core wire portion from the outside. Therefore, the method for manufacturing an electric wire with a terminal and the apparatus for manufacturing an electric wire with a terminal according to the present invention can produce an electric wire with a terminal having improved anticorrosion performance at a connection portion between the electric wire and the terminal fitting.

FIG. 1 is an exploded perspective view showing an electric wire with a terminal (excluding a water stop portion) according to an embodiment together with a main part of a crimping machine. FIG. 2 is a plan view showing an electric wire with a terminal according to an embodiment. FIG. 3 is a cross-sectional view taken along the line XX of FIG. FIG. 4 is an explanatory diagram showing an electric wire having a cross section of the YY line of FIG. FIG. 5 is a block diagram showing a manufacturing apparatus for an electric wire with terminals. FIG. 6 is an explanatory diagram showing a method of manufacturing an electric wire with a terminal.

Hereinafter, an embodiment of an electric wire with a terminal, a method for manufacturing the electric wire with a terminal, and an apparatus for manufacturing an electric wire with a terminal according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Embodiment]
One of the embodiments of the electric wire with a terminal, the method for manufacturing the electric wire with a terminal, and the apparatus for manufacturing the electric wire with a terminal according to the present invention will be described with reference to FIGS. 1 to 6.

Reference numeral 1 in FIGS. 1 to 4 indicates an electric wire with a terminal according to this embodiment. Reference numeral 101 in FIGS. 1 and 5 indicates a device for manufacturing an electric wire with a terminal in the present embodiment.

First, the manufacturing apparatus 101 of the present embodiment and the electric wire 1 with terminals produced by the manufacturing method using the apparatus 101 will be described. The electric wire 1 with a terminal includes an electric wire 10 physically and electrically connected to each other and a terminal fitting 20 (FIGS. 1 to 5). Further, the electric wire 1 with a terminal is provided with a water blocking member 30 for suppressing the ingress of liquid such as water or salt water into the connection portion in order to enhance the anticorrosion performance of the connection portion between the electric wire 10 and the terminal fitting 20. (Figs. 2 to 5).

The electric wire 10 includes a core wire 11 and a coating 12 for covering the core wire 11. In the electric wire terminal 10a, the coating wire 12 is stripped off to expose the core wire 11 (FIGS. 1 to 3). The core wire 11 is formed by bundling a plurality of strands 13 made of a conductive metal wire. The coating 12 is formed of an insulating resin material that covers other than the exposed core wire portion 11a of the core wire 11 in the electric wire terminal 10a. In the electric wire 1 with a terminal of the present embodiment, the terminal metal fitting 20 is attached to the electric wire terminal 10a.

The terminal fitting 20 is formed of a conductive material such as metal. The terminal fitting 20 is formed into a predetermined shape by, for example, press molding such as bending or cutting on a metal plate as a base material.

The terminal fitting 20 has a terminal connecting body 21 that is physically and electrically connected to a terminal connecting body (not shown) of the other terminal fitting (FIGS. 1 to 3 and 5). For example, one of the terminal connection body 21 of the terminal fitting 20 and the terminal connection body of the other terminal fitting are formed in the shape of a female terminal and the other of them is formed in the shape of a male terminal, and are inserted and fitted to each other. Can be combined.

Further, the terminal fitting 20 has a wire connecting body 22 connected to the wire terminal 10a (FIGS. 1 to 3 and 5). The electric wire connecting body 22 has a core wire connecting body 23 that is physically and electrically connected to the exposed core wire portion 11a and a coating that is physically connected to the covering terminal portion 12a of the covering 12 in the electric wire terminal 10a. A connecting body 25 that connects the connecting body 24, the core wire connecting body 23, and the covering connecting body 24 at intervals, and exposes the core wire exposed portion 11a from between the core wire connecting body 23 and the covering connecting body 24. Have

The core wire connecting body 23 shown here is formed by crimping and crimping the two barrel piece portions 23B (FIG. 1) connected to the bottom portion 23A by winding them around the core wire exposed portion 11a and crimping them against the core wire exposed portion 11a. Connect physically and electrically. The core wire connecting body 23 after crimping and crimping shown here has the tip of the core wire exposed portion 11a protruding toward the terminal connecting body 21 side from the tip of the terminal connecting body 21 side (FIGS. 2 and 3).

The coated connection body 24 shown here is formed by crimping and crimping two barrel piece portions 24B (FIG. 1) connected to the bottom portion 24A by winding them around the coated terminal portion 12a and crimping them against the coated terminal portion 12a. Physically connect. The coated connecting body 24 after crimping and crimping shown here has the tip of the coated terminal portion 12a protruding toward the connecting body 25 side from the tip 24a on the connecting body 25 side (FIGS. 2 and 3).

The connecting body 25 shown here mainly connects the bottom portion 23A of the core wire connecting body 23 and the bottom portion 24A of the covering connecting body 24, and each of the core wire connecting body 23 and the covering connecting body 24 after crimping and crimping is used. The exposed core wire portion 11a is exposed between the barrel piece portions 23B and 24B (FIGS. 2 and 3). In the wire connecting body 22 after crimping and crimping shown here, the connecting body 25 has an opening 25a between the core wire connecting body 23 and the covering connecting body 24. The connecting body 25 shown here has a U-shaped cross section orthogonal to the axial direction of the exposed core wire portion 11a, and the exposed core wire portion 11a is exposed from the U-shaped opening 25a. The exposed core wire portion 11a after crimping and crimping exposes the exposed portion 11a ₁ from the opening 25a.

Here, the wire 13 of the core wire 11 and the terminal fitting 20 may be each molded of the same metal material, or may be molded of different metal materials. The strand 13 and the terminal fitting 20 shown here are made of metal materials having different ionization tendencies, and one of them has an ionization tendency larger than that of the other. In this example, the wire 13 is made of aluminum or an aluminum alloy, and the terminal fitting 20 is made of copper or a copper alloy having a lower ionization tendency than the wire 13.

The water stop member 30 is provided at least between the tip of the exposed core wire portion 11a and the rear end 24b of the covering connection body 24 in order to enhance the anticorrosion performance of the connection portion between the electric wire 10 and the terminal fitting 20 (FIG. 2 and FIG. Figure 3). The water blocking member 30 is formed after the electric wire 10 and the terminal fitting 20 are connected by the above-mentioned crimping and crimping. That is, the water blocking member 30 is formed on the electric wire 1X with a terminal as a semi-finished product in which the electric wire 10 and the terminal fitting 20 are connected (FIGS. 5 and 6).

The water blocking member 30 is at least between the position of the connecting body 25 and the position of the rear end 24b (rear end position) opposite to the position (tip position) of the tip 24a on the connecting body 25 side in the coated connecting body 24. A solder water blocking portion 31 formed of solder in the gap G (FIGS. 3 and 4) between the strands 13 of the core wire 11 and a viscous curable resin material, and the core wire exposed portion 11a is connected to the core wire connecting body 23. And a resin water blocking portion 32 that covers the outside together with the covering connecting body 24 (FIGS. 2 and 3). For convenience of illustration, the solder water blocking portion 31 of FIGS. 2 and 3 is cross-hatched to represent the formed range. Further, the resin water stop portion 32 in the figure is a conceptual representation of this, and does not necessarily have the shape in the figure.

The solder water blocking portion 31 is formed to suppress the inflow of liquid into the gap G between the strands 13 of the core wire 11 from at least the position of the connecting body 25 to the rear end position of the covering connecting body 24. The solder water blocking portion 31 is formed by melting the solder paste 31X, allowing the molten solder to permeate into the gap G between the strands 13 and then solidifying it (FIG. 6). On the other hand, the resin water stop portion 32 is formed in order to suppress the adhesion of the liquid from the outside to the core wire exposed portion 11a. The resin water blocking portion 32 is formed of a high-viscosity curable resin material 32X capable of continuing to cover the core wire exposed portion 11a until it is cured (FIG. 6). For example, as the curable resin material 32X, a material having a viscosity of 1500 mPa · s or more is used.

The solder water blocking portion 31 is formed in a gap G between the strands 13 inside the core wire 11 and a gap G between the strands 13 on the outer peripheral surface side of the core wire 11. Note that FIG. 6 shows an example of the solder water blocking portion 31 inside the coated connection body 24. For example, in the coated terminal portion 12a, the inner peripheral surface side thereof may enter the gap G between the strands 13 on the outer peripheral surface side of the core wire 11 by the pressure from the coated connecting body 24, and fill the gap G. In the inner side of the coated connection body 24, when all the gaps G between the strands 13 on the outer peripheral surface side of the core wire 11 are filled with the coated terminal portion 12a, as shown in FIG. 6, the inner side of the core wire 11 A solder water blocking portion 31 is formed in the gap G between the strands 13 in the above. On the other hand, in the inner side of the coated connection body 24, if all the gaps G or a part of the gaps G between the strands 13 on the outer peripheral surface side of the core wire 11 are not filled with the coated terminal portion 12a, the coated terminal portion thereof. A solder water blocking portion 31 is also formed in the gap G between the strands 13 not filled with 12a.

The resin water stop portion 32 is formed so as to cover the solder water stop portion 31 in the core wire exposed portion 11a from the outside by covering the core wire exposed portion 11a together with the core wire connecting body 23 and the coated connecting body 24 from the outside. 2 and 3).

Subsequently, a method for manufacturing the electric wire 1 with terminals and a manufacturing apparatus 101 used in the manufacturing method will be described. In this example, in a terminal chain body (not shown) in which a plurality of terminal fittings 20 before crimping are connected at equal intervals, the terminal fittings 20 are crimped to the electric wire 10 while being sent out one by one. ..

This manufacturing method includes a delivery step of feeding a plurality of terminal fittings 20 of a terminal chain from the head to a crimping position in order. This delivery step is performed using the delivery machine 110 of the manufacturing apparatus 101 (FIG. 5). Here, a transmitter 110 having a configuration well known in this art is used. Further, the operation of the transmitter 110 is controlled by the control device 191 (FIG. 5).

In the transmitter 110, a terminal chain body in which a plurality of terminal fittings 20 before crimping are wound in a reel shape is installed. The transmitter 110 pulls out the terminal metal fitting 20 before the crimping process at the head on the outer peripheral side of the terminal chain body wound in a reel shape, and sequentially toward the crimping position of the crimping machine 120 described later in the subsequent process. send out.

Further, this manufacturing method includes a crimping step of crimping the terminal fitting 20 before crimping to the electric wire terminal 10a at the crimping position. In this crimping process, the wire connection body 22 of the terminal fitting 20 before the crimping process is crimped to the wire terminal 10a to form a wire 1X with a terminal as a semi-finished product to which the wire 10 and the terminal fitting 20 are connected. do. This crimping step is performed using the crimping machine 120 of the manufacturing apparatus 101 (FIG. 5). Here, a crimping machine 120 having a structure well known in this technical field is used. Further, the operation of the crimping machine 120 is controlled by the control device 191 (FIG. 5).

In the crimping machine 120, the electric wire terminal 10a is placed on the inner wall surface of the electric wire connecting body 22 in the terminal fitting 20 before the crimping process supplied to the crimping position, and the electric wire connecting body 22 is crimped to the electric wire terminal 10a. By going, the electric wire connecting body 22 is crimped to the electric wire terminal 10a. The crimping machine 120 shown here crimps and crimps the core wire connecting body 23 of the electric wire connecting body 22 to the exposed core wire portion 11a of the electric wire 10 while pressurizing and deforming the core wire connecting body 23, and also applies the coated connecting body 24 of the electric wire connecting body 22. While being pressure-deformed, it is crimped and crimped to the covered terminal portion 12a of the electric wire terminal 10a.

The crimping machine 120 includes a first mold 121 and a second mold 122 for arranging the electric wire terminal 10a and the electric wire connecting body 22 on which the electric wire terminal 10a is placed on the inner wall surface between them (FIG. 1). The first mold 121 and the second mold 122 pressurize while sandwiching the electric wire terminal 10a and the electric wire connecting body 22 on which the electric wire terminal 10a is placed on the inner wall surface, and pressurize the core wire connecting body 23 to the core wire exposed portion 11a. It is crimped and crimped, and the coated connection body 24 is crimped and crimped to the coated terminal portion 12a. In the crimping machine 120 shown here, the first mold 121 is arranged as a lower mold (anvil), and the bottom portion 23A of the core wire connecting body 23 in the electric wire connecting body 22 and the connecting body 25 are covered and connected to the first mold 121. The bottom 24A of the body 24 is placed on it. Further, in the crimping machine 120 shown here, the second mold 122 as the upper mold (crimp) is arranged above the first mold 121 at intervals.

In the first mold 121 and the second mold 122 shown here, the first molding portions 121A and 122A for crimping and crimping the core wire connecting body 23 to the core wire exposed portion 11a and the covering connecting body 24 are covered with the covering terminal portion, respectively. It has second molding portions 121B and 122B to be crimped and crimped to 12a (FIG. 1).

In this crimping machine 120, the upper surfaces of the first forming portion 121A and the second forming portion 121B of the first mold 121 are crimping positions, and the electric wire connecting body 22 is placed at these crimping positions. Then, in the crimping machine 120, the position of the first mold 121 is fixed, and the second mold 122 is moved up and down with respect to the first mold 121 to connect the electric wire connecting body 22 at the crimping position to the electric wire. It is crimped to the terminal 10a. At that time, in this crimping machine 120, by lowering the second mold 122 toward the wire connecting body 22 at the crimping position, the bottom of the wire connecting body 22 (bottom 23A of the core wire connecting body 23, connecting body 25). , The electric wire terminal 10a is placed on the bottom portion 24A) of the covering connecting body 24, and the electric wire connecting body 22 is pressure-deformed between the first forming portions 121A and 122A and between the second forming portions 121B and 122B. go.

The first molding portion 122A of the second mold 122 is arranged to face the upper surface 121a of the first molding portion 121A of the first mold 121, and is added while sliding the pair of barrel piece portions 23B of the core wire connecting body 23. A pressure-deformed pressure surface 122a is formed (FIG. 1). The pressure surface 122a is formed in a shape corresponding to the shape of the core wire connecting body 23 after the crimping is completed. Further, the second molding portion 122B of the second mold 122 is arranged to face the upper surface 121b of the second molding portion 121B of the first mold 121, and the pair of barrel piece portions 24B of the covering connection body 24 are slid. While the pressure surface 122b is formed to be deformed by pressure (FIG. 1). The pressure surface 122b is formed in a shape corresponding to the shape of the coated connecting body 24 after the pressure bonding is completed. The crimping machine 120 includes a power transmission mechanism that moves the second die 122 up and down with a constant stroke with respect to the first die 121 (not shown).

In the crimping process using this crimping machine 120, the first molding portion 122A of the second mold 122 is lowered toward the core wire connecting body 23 placed on the upper surface 121a of the first molding portion 121A of the first mold 121. By doing so, the core wire exposed portion 11a of the electric wire 10 is placed on the inner wall surface of the bottom portion 23A of the core wire connecting body 23, and the core wire connecting body 23 is crimped against the core wire exposed portion 11a. Further, in this crimping step, the second molding portion 122B of the second mold 122 is lowered toward the covering connection body 24 placed on the upper surface 121b of the second molding portion 121B of the first mold 121. The coated terminal portion 12a of the electric wire 10 is placed on the inner wall surface of the bottom portion 24A of the coated connecting body 24, and the coated connecting body 24 is crimped and crimped to the coated terminal portion 12a.

Further, in this manufacturing method, after the crimping step is completed, the terminal fitting 20 that has been crimped is separated from the terminal chain body. This separation step may be performed using the cutting machine 130 (FIG. 5), or may be performed by an operator. When the cutting machine 130 is used, the cutting machine 130 is installed as one of the components of the manufacturing apparatus 101, and its operation is controlled by the control device 191 (FIG. 5).

In this manufacturing method and manufacturing apparatus 101, the electric wire 1X with a terminal as a semi-finished product is formed by this. Then, in this manufacturing method and the manufacturing apparatus 101, the solder water stop portion 31 and the resin water stop portion 32 of the water stop member 30 are formed on the electric wire 1X with a terminal as a semi-finished product.

In this manufacturing method, the solder paste 31X is supplied to the electric wire 1X with terminals as a semi-finished product, and the solder paste 31X is melted and then solidified to form the solder water blocking portion 31. After that, in this manufacturing method, the curable resin material 32X is supplied, and the curable resin material 32X is cured to form the resin water-stopping portion 32.

However, in this example, as shown above, aluminum or an aluminum alloy is used for the wire 13. Therefore, in the electric wire 1X with a terminal as a semi-finished product, an oxide film is formed on the surface of the wire 13. Therefore, in this exemplary manufacturing method, the conduction performance between the wire 13 and the solder is enhanced by removing the oxide film before supplying the solder paste 31X. Therefore, the manufacturing method shown here includes an oxide film removing step of removing the oxide film on the surface of the wire 13. The oxide film removing step is performed using the oxide film removing device 140 of the manufacturing apparatus 101 (FIG. 5). Here, an oxide film removing device 140 having a structure well known in this technical field is used. Further, the operation of the oxide film removing device 140 is controlled by the control device 192 (FIG. 5).

The oxide film removing device 140 of this example is a laser irradiation device provided with a laser oscillator, and removes the oxide film on the surface of the wire 13 by laser ablation processing (non-thermal processing). In this oxide film removing step, the exposed portion of the core wire exposed portion 11a after crimping and crimping is irradiated with laser light from the oxide film removing device 140, and the surface of the wire 13 is oxidized in the exposed portion. Remove the film.

In this exemplary manufacturing method, after the oxide film removing step is performed, the solder paste 31X is applied to the exposed portion of the core wire exposed portion 11a from which the oxide film on the surface of the wire 13 has been removed. Therefore, this manufacturing method includes a solder coating step of applying the solder paste 31X to the exposed portion from the wire connecting body 22 in the core wire exposed portion 11a after crimping and crimping. The solder coating step is performed using the solder coating machine 150 of the manufacturing apparatus 101 (FIG. 5). Here, a solder coating machine 150 having a structure well known in this technical field is used. Further, the operation of the solder coating machine 150 is controlled by the control device 192 (FIG. 5).

The solder coating machine 150 includes a nozzle 151 that discharges the solder paste 31X from the ejection port 151b of the nozzle tip 151a (FIG. 5). In this manufacturing method, the solder water blocking portion 31 is formed in the gap G between the strands 13 of the core wire 11 within a desired range. Therefore, in the solder coating step, an amount of solder paste 31X capable of infiltrating the molten solder into the gap G within the desired range is discharged from the nozzle 151.

In the electric wire 1X with a terminal as a semi-finished product, the exposed portion of the core wire exposed portion 11a which is the target for removing the oxide film of the wire 13 and the target for supplying the solder paste 31X is the terminal connection body 21 side of the core wire connection body 23. There is a tip portion of the core wire exposed portion 11a protruding from the tip end, or a portion (exposed portion 11a ₁ ) exposed from the opening 25a of the connecting body 25 in the core wire exposed portion 11a. _{In the manufacturing method shown here, the oxide film on the surface of the wire 13 in the exposed portion 11a 1} of the exposed core wire portion 11a exposed from the opening 25a of the connecting body 25 is removed by the oxide film removing step, and the exposed portion 11a _{1 is removed.} The solder paste 31X is applied to the solder paste in the solder application step.

Further, in this manufacturing method, the solder paste 31X is melted, and the molten solder is permeated into the gap G between the strands 13 of the core wire 11 and then solidified to form the solder water stop portion 31. It has a part forming step. The solder water stop forming step is performed by using the solder water stop forming device 160 of the manufacturing apparatus 101 (FIG. 5). Here, a solder water stop forming device 160 having a structure well known in this technical field is used. Further, the operation of the solder water stop forming device 160 is controlled by the control device 192 (FIG. 5).

The solder water stop forming device 160 of this example is a laser irradiation device provided with a laser oscillator, and melts the solder paste 31X by thermal processing. In this solder water blocking portion forming step, the _{solder paste 31X applied to the exposed portion 11a 1} of the core wire exposed portion 11a is irradiated with laser light from the solder water blocking portion forming device 160, and the solder paste 31X is melted. By allowing the molten solder to penetrate into the gap G between the strands 13 of the core wire 11. In this solder water blocking portion forming step, laser light is irradiated until the molten solder penetrates into the gap G between the strands 13 of the core wire 11 within a desired range. The irradiation time of the laser beam may be obtained in advance by simulation or the like.

In this solder water stop forming step, when the irradiation time of the laser light has elapsed, the emission of the laser light from the solder water stop forming device 160 is stopped to solidify the molten solder. As a result, in this solder water stop forming step, the solder water stop 31 in which the molten solder is solidified is formed in the gap G between the strands 13 of the core wire 11 within a desired range. In the solder water blocking portion forming step shown here, the molten solder is infiltrated into the gap G between the strands 13 of the core wire 11 from at least the position of the connecting body 25 to the rear end position of the coated connecting body 24 and then solidified. By doing so, a solder water blocking portion 31 is formed in the gap G. In this solder water stop forming step, _{when a gap Gx (FIG. 3) exists between the exposed portion 11a 1} and the connecting body 25, the space between the exposed portion 11a ₁ and the connecting body 25 is formed. The molten solder may also flow into the gap Gx to form the solder water blocking portion 31 in the gap Gx.

Further, this manufacturing method includes a resin supply step of supplying the curable resin material 32X forming the resin water blocking portion 32 to the terminal-equipped electric wire 1X as a semi-finished product. The resin supply step is performed using the resin supply machine 170 of the manufacturing apparatus 101 (FIG. 5). Here, a resin feeder 170 having a configuration well known in this technical field is used. Further, the operation of the resin feeder 170 is controlled by the control device 192 (FIG. 5).

The resin feeder 170 includes a nozzle 171 that discharges the curable resin material 32X from the discharge port 171b of the nozzle tip 171a (FIG. 5). The resin feeder 170 discharges the curable resin material 32X from the discharge port 171b of the nozzle tip 171a, and connects the core wire to the exposed core wire portion 11a in which the solder water blocking portion 31 is formed in the gap G between the strands 13. The body 23 and the coated connecting body 24 are covered from the outside with the curable resin material 32X.

In the resin supply step shown here, the curable resin material 32X is discharged from the discharge port 171b and applied over between the tip of the core wire exposed portion 11a and the tip 24a of the coated connector 24, and the core wire exposed portion 11a is applied. The area from the tip of the cover to the tip 24a of the coated connector 24 is covered from the outside with the curable resin material 32X. In that case, if the opening 25a side of the connecting body 25 is defined as the upper side, the curable resin material 32X is applied within a range that does not allow the curable resin material 32X to squeeze out to the side of the terminal fitting 20. ..

Further, this manufacturing method includes a resin curing step of curing the curable resin material 32X supplied to the terminal-equipped electric wire 1X as a semi-finished product. This resin curing step is performed using the resin curing device 180 of the manufacturing device 101 (FIG. 5). Here, a resin curing device 180 having a structure well known in the art according to how the curable resin material 32X is cured is used. Further, the operation of the resin curing device 180 is controlled by the control device 192 (FIG. 5).

For example, the curable resin material 32X is a viscous ultraviolet curable resin material that is cured by irradiation with ultraviolet rays, or is a viscous one-component thermosetting resin material that is heated by heating. Those that cure are used. As the curable resin material 32X shown here, an ultraviolet curable resin material is used. Therefore, as the resin curing device 180 shown here, an ultraviolet irradiation device is used. In this resin curing step, the resin curing device 180 is operated to irradiate the curable resin material 32X with ultraviolet rays from the outside to cure the curable resin material 32X, and the resin composed of the curable resin material 32X. The water stop portion 32 is formed.

The manufacturing method and the manufacturing apparatus 101 form the electric wire 1 with terminals as described above.

Here, in the conventional method for manufacturing an electric wire with a terminal and a device for manufacturing an electric wire with a terminal, in order to form a waterproof portion made of a curable resin material in the gap between the strands of the core wire in the exposed portion of the exposed core wire portion, the water blocking portion is formed. With the tip of the nozzle separated from the exposed portion, the curable resin material is dropped onto the exposed portion. Therefore, in the conventional method for manufacturing an electric wire with a terminal and the equipment for manufacturing an electric wire with a terminal, the curable resin material does not penetrate into all the gaps between the strands unless the viscosity of the curable resin material is lowered. There is a possibility that it will stop on the surface of the exposed part of the exposed core wire, and the stopped curable resin material will block the opening of the connecting body. However, in the conventional method for manufacturing a wire with a terminal and the equipment for manufacturing a wire with a terminal, if a curable resin material having a viscosity that easily penetrates into the gap between the wires is used, the curable resin material can be applied to all the wires between the wires. Even if it can penetrate into the gap, there is a possibility that this curable resin material will escape without stopping in all the gaps between the strands.

On the other hand, in the method for manufacturing a terminal-attached electric wire and the terminal-attached electric wire manufacturing apparatus 101 of the present embodiment, the solder paste 31X applied to the exposed portion of the core wire exposed portion 11a after crimping is melted, and this molten solder is melted into the core wire. Since it is infiltrated into the gap G between the strands 13 of 11 and then solidified, the electric wire 1 with a terminal is provided with the solder water blocking portion 31 filled in all the gaps G between the strands 13. Then, in the method for manufacturing the electric wire with terminals and the apparatus 101 for manufacturing the electric wire with terminals, after the solder water blocking portion 31 is formed, the curable resin material 32X is supplied so as to cover the core wire exposed portion 11a from above. By curing the curable resin material 32X, the electric wire 1 with a terminal is provided with a resin water blocking portion 32 that covers the core wire exposed portion 11a from the outside. Therefore, the method for manufacturing a terminal-attached electric wire and the terminal-attached electric wire manufacturing apparatus 101 of the present embodiment can produce a terminal-attached electric wire 1 having improved anticorrosion performance at a connection portion between the electric wire 10 and the terminal fitting 20. ..

Furthermore, in the method for manufacturing a terminal-attached electric wire and the terminal-attached electric wire manufacturing apparatus 101 of the present embodiment, the core wire 11 of the electric wire terminal 10a is covered not only with the core wire exposed portion 11a but also inside the coated terminal portion 12a. The solder water blocking portion 31 is formed so as to fill the gap G between the strands 13 up to the rear end position of the connecting body 24. Therefore, the method for manufacturing a terminal-attached electric wire and the terminal-attached electric wire manufacturing apparatus 101 of the present embodiment can produce a terminal-attached electric wire 1 having further improved anticorrosion performance at a connection portion between the electric wire 10 and the terminal fitting 20. can. For example, in the method for manufacturing an electric wire with a terminal and the apparatus 101 for manufacturing an electric wire with a terminal shown here, the wire 13 and the terminal fitting 20 are made of different metals, but due to the presence of the solder water stop portion 31, even if the electric wire is present. Even if the terminal 10a is immersed in a liquid, it is possible to create an electric wire 1 with a terminal capable of suppressing the occurrence of so-called galvanic corrosion between the wire 13 and the terminal metal fitting 20.

Here, in the electric wire 1 with a terminal, the terminal metal fitting 20 is housed in a cavity (not shown) of a connector (non-waterproof connector) having no waterproof function, and the electric wire terminal opposite to the terminal metal fitting 20 has an anticorrosion function. A terminal fitting (not shown) that does not have a waterproof mechanism may be accommodated in a cavity (not shown) of a connector (waterproof connector) having a waterproof mechanism. In the electric wire 1 with terminals, the non-waterproof connector side may be arranged inside the vehicle interior, and the waterproof connector side may be arranged outside the vehicle interior. In this case, in the electric wire 1 with terminals, even if a negative pressure is generated inside the coating 12 due to the temperature difference between the inside and outside of the vehicle interior, the liquid is discharged from the outside to the core wire exposed portion 11a due to the presence of the water blocking member 30. Since it is not sucked in, the anticorrosion performance of the connection portion between the electric wire 10 and the terminal fitting 20 can be maintained. As described above, the method for manufacturing a terminal-attached electric wire and the terminal-attached electric wire manufacturing apparatus 101 of the present embodiment can produce the terminal-attached electric wire 1 having excellent durability.

Further, the electric wire 1 with a terminal can improve the anticorrosion performance of the connection portion between the electric wire 10 and the terminal metal fitting 20 without causing the water blocking member 30 to protrude to the side of the terminal metal fitting 20. .. That is, the method for manufacturing an electric wire with a terminal and the apparatus 101 for manufacturing an electric wire with a terminal according to the present embodiment include the electric wire 10 and the terminal metal fitting 20 without obstructing the insertion of the terminal metal fitting 20 into a cavity (not shown) such as a connector. It is possible to create an electric wire 1 with a terminal having improved anticorrosion performance at the connection portion between the two.

1 Wire with terminal 10 Wire 10a Wire terminal 11 Core wire 11a Core wire exposed part 11a ₁ Exposed part 12 Covered 12a Covered terminal part 13 Wire 20 Terminal metal fittings 21 Terminal connection body 22 Wire connection body 23 Core wire connection body 24 Covered connection body 24a Tip 24b Rear end 25 Connection body 25a Opening 30 Water stop member 31 Solder water stop part 31X Solder paste 32 Resin water stop part 32X Curable resin material 101 Manufacturing equipment 120 Crimping machine 121 First mold 122 Second mold 140 Oxide film remover 150 Solder coating machine 160 Solder water stop forming device 170 Resin feeder 171 Nozzle 171a Nozzle tip 171b Discharge port 180 Resin curing device

Claims (6)

A core wire composed of a plurality of strands and an electric wire having a coating covering other than the exposed core wire portion of the core wire in the electric wire terminal, and an electric wire.
With the terminal fitting attached to the electric wire terminal,
A water blocking member that suppresses the ingress of liquid into the connection portion between the electric wire and the terminal fitting,
Equipped with
The terminal fitting includes a core wire connecting body that is physically and electrically connected to the exposed core wire portion, a coated connecting body that is crimped and crimped to the coated terminal portion of the coating in the electric wire terminal, and the above. It has a connecting body that connects the core wire connecting body and the coated connecting body at a space, and exposes the exposed core wire portion from between the core wire connecting body and the covering connecting body.
The water blocking member is formed of solder in the gap between the strands of the core wire from at least the position of the connecting body to the rear end position on the opposite side to the tip position on the connecting body side in the coated connecting body. It is made of a solder water blocking part that suppresses the inflow of liquid into the gap and a curable resin material, and covers the exposed core wire portion from the outside together with the core wire connecting body and the covering connecting body, and outside the exposed core wire portion. An electric wire with a terminal characterized by having a resin water stop that suppresses the adhesion of liquid from the side. The electric wire with a terminal according to claim 1, wherein the wire and the terminal fitting are made of a metal material having different ionization tendencies. While sandwiching the wire terminal of the core wire composed of a plurality of strands and the electric wire having a coating covering the core wire, and the electric wire connection body of the terminal fitting on which the electric wire terminal is placed on the inner wall surface, between the first mold and the second mold. Pressurization is applied to crimp the core wire connecting body of the electric wire connecting body to the exposed core wire portion of the electric wire terminal, and the core wire connecting body is connected to the core wire connecting body of the electric wire connecting body via the connecting body. A crimping step of crimping and crimping the coated connector to the coated terminal portion of the coating in the electric wire terminal.
The solder application step of applying the solder paste to the exposed portion from the wire connection body in the core wire exposed portion after crimping and crimping, and
The solder paste is melted, and the molten solder is applied to the gap between the core wires at least from the position of the connecting body to the rear end position on the side opposite to the tip position on the connecting body side in the coated connection body. The process of forming the solder water stop part that forms the solder water stop part that has been infiltrated and then solidified,
The curable resin material is discharged from the discharge port at the tip of the nozzle, and the core wire exposed portion, the core wire connecting body, and the covering connecting body having the solder water blocking portion formed in the gap between the strands are formed of the curable resin. The resin supply process that covers from the outside with the material,
A process of forming a resin water-stopping portion by operating a resin curing device to form a resin water-stopping portion obtained by curing the curable resin material, and a process of forming the resin water-stopping portion.
A method for manufacturing an electric wire with a terminal, which is characterized by having. The method for manufacturing an electric wire with a terminal according to claim 3, wherein in the solder coating step, the solder paste is applied to the exposed portion exposed from the opening of the connecting body. It has an oxide film removing step of removing the oxide film on the surface of the wire made of aluminum or an aluminum alloy in the exposed portion of the exposed portion of the core wire after crimping and crimping.
The method for manufacturing a terminal-attached electric wire according to claim 3 or 4, wherein the solder coating step is performed after the oxide film removing step is performed. A first mold and a second mold for arranging a core wire composed of a plurality of strands, an electric wire terminal of an electric wire having a coating covering the core wire, and an electric wire connection body of a terminal fitting on which the electric wire terminal is placed on an inner wall surface. A mold is provided, and the wire terminal and the wire connection body are pressed while being sandwiched between the first mold and the second mold, so that the core wire connection body in the wire connection body is exposed to the core wire core wire portion in the wire terminal. With a crimping machine that crimps and crimps the coated connection body connected to the core wire connecting body of the electric wire connecting body via a connecting body to the coated terminal portion of the coating of the electric wire terminal. ,
A solder coating machine that applies solder paste to the exposed portion from the wire connection body in the core wire exposed portion after crimping and crimping.
The solder paste is melted, and the molten solder is applied to the gap between the core wires at least from the position of the connecting body to the rear end position on the side opposite to the tip position on the connecting body side in the coated connection body. A solder water stop forming device that forms a solder water stop that has been infiltrated and then solidified.
The core wire exposed portion, the core wire connecting body, and the covering connecting body are provided with a nozzle for discharging a curable resin material from a discharge port at the tip of the nozzle, and the solder water blocking portion is formed in a gap between the strands. A resin feeder that covers from the outside with a curable resin material,
A resin curing device that cures the curable resin material,
A device for manufacturing electric wires with terminals, which is characterized by being equipped with.

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