JP6280079B2 - Manufacturing method of terminals with wires - Google Patents

Description

The present invention relates to the production how the wire-equipped pin made by forming a corrosion portion the connecting portion of different metals between the wire and the terminal fitting.

  For example, a wire harness is routed in a vehicle in order to electrically connect devices mounted on an automobile. The wire harness includes an electric wire bundle and various connectors arranged at the end of the electric wire bundle. The connector of the wire harness includes an insulating connector housing and a plurality of conductive terminal fittings housed in the terminal housing chamber of the connector housing. A terminal metal fitting is arrange | positioned at the terminal of the electric wire which comprises an electric wire bundle. As the electric wire, a copper electric wire (in which the conductor becomes a stranded wire made of copper or a copper alloy) is generally used, and the terminal fitting is connected by crimping after the end of the copper electric wire is peeled off. Note that the terminal fitting is made of the same copper or copper alloy as the base metal of the conductor of the copper electric wire, and may be plated.

  In recent years, in addition to the shortage of copper resources, aluminum wires are sometimes used instead of copper wires in consideration of lighter vehicles and ease of material recycling. Is made of aluminum or aluminum alloy). However, aluminum wires have a thicker oxide film formed on the surface than copper, which is a conductor material that constitutes copper wires, and in aluminum wires, the contact resistance between this conductor and the terminal fitting (crimp terminal) Is known to tend to be relatively high. Therefore, in order to reduce the contact resistance between the conductor of the aluminum wire and the crimp terminal, a method is adopted in which the conductor is strongly crimped with a pair of conductor crimping pieces formed on the crimp terminal to increase the compression ratio. The According to this method, the oxide film of each strand constituting the conductor can be broken by strongly caulking the conductor of the aluminum electric wire. That is, the contact resistance between the conductor and the crimp terminal can be reduced.

  By the way, the contact portion between the aluminum material and the copper material, in other words, the contact portion between different metals, when moisture intervenes in this contact portion, both the aluminum and copper metals dissolve in the water as ions, and both It is known that electric corrosion occurs due to potential difference between them. In addition, if the conductor of the aluminum electric wire and the crimp terminal made of copper or copper alloy are electrically and mechanically connected, the crimping portion of the conductor by the crimped piece of the crimp terminal is a highly compressive crimp. Inundation is prevented, and as a result, the occurrence of electrolytic corrosion is avoided. However, since the conductor is partially exposed at the position in the terminal axis direction (wire extending direction) with respect to the conductor crimping portion by the conductor crimping piece, moisture adheres to the crimping portion. If it reaches, there is a possibility that the crimped portion is immersed in the electrolytic solution, and aluminum, which is a metal having a large ionization tendency, dissolves and galvanic corrosion proceeds. Therefore, in order to prevent moisture from adhering to the exposed portion of the conductor and water from entering into the crimped portion, conventionally, an anticorrosion portion 115 (sealing portion) as shown in FIG. 10 is formed (for example, see Patent Document 1 below). ).

  In FIG. 10, reference numeral 101 indicates an aluminum electric wire, and reference numeral 102 indicates a crimp terminal. The aluminum electric wire 101 includes a conductor 103 made of aluminum or an aluminum alloy and an insulating resin coating 104 that covers the conductor 103. In the aluminum electric wire 101, the conductor exposed portion 105 is formed by removing the end portion of the resin coating 104. On the other hand, the crimp terminal 102 is a female terminal fitting, and is formed into a shape shown in the figure by pressing a metal plate made of copper or copper alloy. The crimp terminal 102 includes a rectangular cylindrical electrical contact portion 106, a crimped portion 107, and a connecting portion 108 that couples the electrical contact portion 106 and the crimped portion 107. The caulking portion 107 includes a placement portion 109 for placing the conductor exposed portion 105, a conductor caulking piece 110 for caulking the conductor exposed portion 105 placed on the placement portion 109, and a conductor A coating caulking piece 111 for caulking the resin coating 104 in the vicinity of the exposed portion 105 is formed.

  In the above configuration and structure, the conductor caulking portion 112 obtained by caulking the conductor exposed portion 105 with the conductor caulking piece 110 and the resin coating 104 in the vicinity of the conductor exposed portion 105 are caulked with the covering caulking piece 111. An electric wire / terminal connection portion 118 is formed including the covering caulking portion 113. In the conductor caulking portion 112, the non-caulking portion 114 is generated due to the relationship between the length of the conductor exposed portion 105 and the width of the conductor caulking piece 110. Therefore, the anticorrosion part 115 (sealing part) is formed in the electric wire / terminal connection part 118 so as to cover the non-caulking part 114. The anticorrosion part 115 is formed by dropping the anticorrosion material 117 (sealing material) from the nozzles 116 of the two dispensers, and then curing the anticorrosion material 117 applied by this dripping. As the anticorrosion material 117, silicone rubber is employed.

JP 2011-113708 A

  In the prior art, the anticorrosion material 117 is dropped from the nozzles 116 of the two dispensers, and the anticorrosion material 117 applied by this dropping is cured to form the anticorrosion portion 115. The conventional forming method has a problem that it takes a long time to cure the anticorrosive material 117 and dripping or sinking will affect the manufacturability. In addition, when the application range of the anticorrosive material 117 is not accurate, there is a problem that the formation of the anticorrosion part 115 becomes insufficient.

  Furthermore, in the above-described conventional technology, when bubbles are present in the applied anticorrosion material 117 and this is ruptured when the anticorrosion material 117 is cured, the function of the anticorrosion portion 115 is impaired. Has a problem.

The present invention has been made in view of the above, and an object thereof is to provide a high productivity is of good sealing properties (high corrosion resistance and water resistance) producing how the terminals with electric wires.

  The manufacturing method of the terminal with an electric wire of the present invention according to claim 1 made in order to solve the above-mentioned problem is an electric wire processing step of removing the resin coating of the electric wire to form an exposed conductor portion, In order to form a wire / terminal connecting step for forming a wire / terminal connecting portion by connecting a terminal fitting to a position and a sealing portion covering the wire / terminal connecting portion, it is made of an ultraviolet curable resin and has ultraviolet energy. In addition to manufacturing a sealing material supplying step of supplying a sealing material that receives and emits light to the electric wire / terminal connection portion, and a sealing material curing step of irradiating the sealing material with the ultraviolet rays to UV cure In the sealing material curing step, the sealing material in a state of being emitted by the irradiation of the ultraviolet rays is photographed with a camera while removing disturbance light with an optical filter, and the image photographed with the camera Sealing material supply area Characterized in that to determine whether.

  According to the present invention having such a feature, when the sealing material supplied to the electric wire / terminal connection portion is irradiated with ultraviolet rays, the sealing material irradiated with the ultraviolet rays is cured in a short time. Moreover, the sealing material irradiated with ultraviolet rays emits light. When trying to determine the quality of the supply area of the sealing material, it is a matter of course that the former can make it easier to identify the sealing material depending on whether the sealing material emits light or not. . In the present invention, since the sealing material emits light, it is easy and reliable to determine whether the sealing material supply area is good or bad. In the present invention, since disturbance light is removed by the optical filter, it is easier and more reliable to determine the quality of the sealing material supply area.

  According to a second aspect of the present invention, in the method for manufacturing a terminal with an electric wire according to the first aspect, the presence or absence of bubbles in the sealing material from the image taken by the camera as the sealing material curing step. It is characterized by distinguishing.

  According to the present invention having such a feature, since the sealing material emits light when irradiated with ultraviolet rays, it is possible to determine the presence or absence of bubbles in the anticorrosive material from the image of the emitted sealing material.

  According to a third aspect of the present invention, in the method for manufacturing a terminal with an electric wire according to the first or second aspect, as the electric wire / terminal connecting step, the conductor exposed portion is added with a conductor crimping piece of the terminal fitting. A conductor crimped portion, a non-crimped portion around the conductor crimped portion, and a coated crimped portion formed by crimping the resin coating near the conductor exposed portion with a coated crimped piece of the terminal fitting The electric wire / terminal connection part is formed in a range including: the sealing part is formed so as to cover the electric wire / terminal connection part.

  According to the present invention having such a feature, the electric wire / terminal connection portion is formed including the conductor caulking portion, the surrounding non-caulking portion, and the covering caulking portion. In the subsequent process, the sealing portion is formed so as to cover a relatively wide range.

  In addition, the present invention described in claims 1 and 2 is intended for an electric wire as an aluminum electric wire, a terminal fitting as a different metal with respect to the aluminum electric wire, a sealing material as an anticorrosion material, and a sealing portion as an anticorrosion portion. If it limits, it will become the following characteristics. That is, “an electric wire processing step of removing the resin coating to form a conductor exposed portion of an electric wire including a conductor made of aluminum or an aluminum alloy and an insulating resin coating covering the conductor; and the conductor exposed portion In order to form an anti-corrosion part that covers the electric wire / terminal connection part, and an electric wire / terminal connection process in which the base material is connected to a copper or copper alloy terminal fitting to form the electric wire / terminal connection part at the position of An anticorrosive material supplying step of supplying an anticorrosive material made of a curable resin and emitting light upon receiving energy of ultraviolet rays to the electric wire / terminal connection portion; an anticorrosive material curing step of irradiating the anticorrosive material with the ultraviolet rays to UV cure; In the anticorrosive material curing step, the anticorrosive material that has been emitted by the irradiation of ultraviolet rays is photographed with a camera while removing disturbance light with an optical filter, and the camera is The manufacturing method of the terminal with an electric wire, wherein the quality of the supply area of the anticorrosive material is determined from the image taken in the above. ”,“ As the anticorrosive material curing step, the anticorrosion material from the image taken with the camera. The manufacturing method of the terminal with an electric wire characterized by determining the presence or absence of the bubble in a foodstuff.

  In addition, the present invention described in claims 1 and 2 has the following characteristics if the object is limited to a waterproof material as a sealing material and a waterproof part as a sealing portion. That is, "the electric wire processing step of removing the resin coating of the electric wire to form the conductor exposed portion, and the electric wire / terminal connecting step of connecting the terminal fitting to the position of the exposed conductor portion to form the electric wire / terminal connecting portion, A water-stopping material supply step of supplying a water-stopping material made of an ultraviolet curable resin and emitting light upon receiving the energy of ultraviolet rays to form the water-stopping portion that covers the electric wire / terminal connecting portion; And a water-stopping material curing step in which the water-stopping material is irradiated with the ultraviolet rays and UV-cured, and as the water-stopping material curing step, the water-stopping material in a state where light is emitted by the irradiation of the ultraviolet rays. A method of manufacturing a terminal with an electric wire, characterized in that an image is captured by a camera while removing disturbance light with an optical filter, and the quality of the water-stop material supply area is determined from an image captured by the camera. ”,“ Said waterproofing material As step, the above production method of the wired terminal, wherein the image captured by the camera, characterized in that to determine the presence or absence of bubbles in the water stopping material in. ".

  According to the present invention described in claim 1, since the sealing material made of an ultraviolet curable resin is adopted, if the sealing material is irradiated with ultraviolet rays, the sealing material is cured in a short time. There is an effect that can be made. That is, there is an effect that the sealing portion can be formed in a short time. And if a sealing part can be formed in a short time, there exists an effect that it can also form without dripping and sink. In addition, according to the present invention, since the sealing material that emits light by receiving the energy of ultraviolet rays is employed, it is possible to easily determine whether the sealing material is supplied or not. In addition, according to the present invention, since the light emission state of the sealing material is imaged, it is possible to reliably determine whether the sealing material is supplied or not. Further, according to the present invention, since the optical filter is disposed between the sealing material and the camera, the light emission state of the sealing material can be imaged while removing disturbance light, and the result If such an image is used, there is an effect that the quality determination relating to the sealing material supply area can be more reliably performed. If the supply of the sealing material is good, the sealing portion can be formed in a sufficient state. Therefore, according to the present invention as described above, there is an effect that it is possible to provide a method for manufacturing a terminal with an electric wire having good productivity and high sealing performance.

  According to the second aspect of the present invention, if an image is formed in a state where the sealing material is irradiated with ultraviolet rays to emit light, it is possible to determine the presence or absence of bubbles in the sealing material. And if it can be determined that there are no air bubbles in the sealing material, the formation state of the sealing portion can be said to be sufficient, and thus the effect that a highly reliable terminal with an electric wire can be manufactured. Play. Therefore, according to the present invention, it is possible to provide a better manufacturing method.

  According to the third aspect of the present invention, the electric wire / terminal connecting portion is formed including the conductor crimped portion and the surrounding non-crimped portion and the covering crimped portion, and this is used as the sealing portion. Thus, the sealing portion can be formed so as to cover a wider range than the conventional example. Therefore, according to the present invention, it is possible to provide a better manufacturing method.

It is a perspective view which shows the terminal with an electric wire which concerns on the manufacturing method of this invention. It is the sectional view on the AA line of FIG. It is a perspective view of the terminal with an electric wire before forming a corrosion prevention part. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is a perspective view of the terminal with an electric wire for explaining the manufacturing method of the present invention. It is the sectional view on the AA line of FIG. It is process explanatory drawing which concerns on the manufacturing method of this invention. It is a perspective view of a connector constituting the word ear harness. It is a figure of the connector housing of FIG. 8, (a) is a perspective view, (b) is CC sectional view taken on the line. It is a figure of the terminal with an electric wire of a prior art example, (a) is a perspective view, (b) is DD sectional view taken on the line.

  The terminal with electric wire is configured to include an aluminum electric wire and a crimp terminal. The aluminum electric wire includes a conductor made of aluminum or an aluminum alloy and an insulating resin coating that covers the conductor. In the aluminum electric wire, the conductor coating is formed by removing the resin coating (electric wire processing step). The crimp terminal has a crimp portion as a crimp portion, and a conductor crimp piece and a covering crimp piece are formed in the crimp portion. In the terminal with electric wire, the caulking portion is crimped to the conductor exposed portion to form the electric wire / terminal connecting portion (electric wire / terminal connecting step). And an anticorrosion part is formed so that this electric wire and terminal connection part may be covered. As the anticorrosion part, an anticorrosive material made of an ultraviolet curable resin and emitting light upon receiving ultraviolet energy is supplied to the electric wire / terminal connection part (anticorrosive material supplying step), and the anticorrosive material is irradiated with ultraviolet rays and UV cured. It is formed (anticorrosive material curing step).

Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view showing a terminal with electric wires according to the manufacturing method of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a perspective view of the terminal with electric wires before forming the anticorrosion portion, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. 5 is a perspective view of a terminal with an electric wire for explaining the manufacturing method of the present invention, FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5, and FIG. 7 is a process explanatory diagram according to the manufacturing method of the present invention. . In addition, FIG. 8 is a perspective view of a connector constituting the word ear harness, FIG. 9 is a diagram of the connector housing of FIG.

<About the configuration of the terminal 1 with electric wire>
In FIG.1 and FIG.2, the reference number 1 shows the terminal with an electric wire which concerns on the manufacturing method of this invention. The terminal 1 with an electric wire includes an aluminum electric wire 2 (electric wire) and a crimp terminal 3 (terminal fitting) disposed at the end of the aluminum electric wire 2. Moreover, the terminal 1 with an electric wire is comprised so that it may have the anticorrosion part 4 (sealing part, waterproof part) in the connection part of the dissimilar metals in the aluminum electric wire 2 and the crimp terminal 3. FIG. In addition, although the terminal 1 with an electric wire of a present Example is arrange | positioned by arrange | positioning the crimp terminal 3 in the terminal of the aluminum electric wire 2, for example, even if it arrange | positions the terminal metal fitting of an appropriate shape in the middle of the aluminum electric wire 2 Be good.

<About the structure and structure of the aluminum electric wire 2>
In FIG. 1 to FIG. 4, the aluminum electric wire 2 has a circular cross section and has a flexibility that generates a reaction force to return to the original state when a bending force is applied. The aluminum electric wire 2 includes a conductor 5 and a resin coating 6.

The conductor 5 is formed by twisting a plurality of strands (not shown) having a circular cross section. This strand is made of aluminum or aluminum alloy. That is, the conductor 5 is made of aluminum or aluminum alloy. The conductor 5 has a predetermined conductor cross-sectional area. A portion of this conductor cross-sectional area exists by the length of the aluminum wire 2. The aluminum material has a specific gravity of 2.70 g / cm ³ and the copper material described later has a specific gravity of 8.96 g / cm ³ , so the aluminum wire 2 is light and used as a long vehicle-mounted electric wire. This is effective for improving fuel efficiency.

  The aluminum material has a standard electrode potential in an electrochemical reaction of −1.676 V, and the standard electrode potential of a copper material described later is +0.340 V. These potential differences are large. Therefore, if moisture enters and stays between the aluminum material and the copper material, a battery is formed by aluminum, copper, and an aqueous electrolyte solution. Then, different metal contact corrosion (galvanic corrosion, electrolytic corrosion) occurs on the battery anode, that is, on the conductor 5. From such a thing, of course, the anticorrosion part 4 for preventing electric corrosion is needed.

  The resin coating 6 is a so-called insulator, and is formed into a circular cross section by extruding an insulating resin material outside the conductor 5. Various types of known materials can be used as the resin material. For example, it is appropriately selected from polymer materials such as polyvinyl chloride resin, polyethylene resin, and polypropylene resin.

  In the aluminum electric wire 2 as described above, the resin coating 6 is removed by a predetermined length at this end to form the conductor exposed portion 7.

<About the structure of the crimp terminal 3>
1 to 4, a crimp terminal 3 is a female terminal fitting, and a base material is formed into a shape shown in the figure by pressing a metal plate made of copper or copper alloy (male type). It may be a terminal fitting). Although not specifically shown, the surface of the base material is plated. The plating is interposed between the copper material and the aluminum material that become the contact portions of different metals. The crimp terminal 3 includes an electrical contact portion 8, a crimping portion 9, and a connecting portion 10 that couples the electrical contact portion 8 and the crimping portion 9.

  The electrical contact portion 8 is an electrical connection portion with a mating terminal fitting (not shown), and is formed in a cylindrical shape having a rectangular cross section. An insertion space for the tab of the mating terminal fitting is formed inside the electrical contact portion 8. Moreover, the elastic contact piece 11 which contacts elastically when a tab is inserted is formed. Reference numeral 12 in the electrical contact portion 8 indicates a locked portion that is hooked and locked to a lance 54 of the connector housing 52 described later.

  The crimping part 9 is an electrical connection part with the aluminum electric wire 2, and since the terminal fitting of the present embodiment is the crimp terminal 3, it is formed in a part that can be connected by crimping. Specifically, a placement portion 13 for placing the conductor exposed portion 7 of the aluminum electric wire 2 and a pair of conductor crimping pieces for crimping the conductor exposed portion 7 placed on the placement portion 13 14 and a pair of covering crimping pieces 15 for crimping the resin coating 6 in the vicinity of the conductor exposed portion 7. In addition, the mounting part 13 may be called a bottom plate. Moreover, the conductor crimping piece 14 may be called a wire barrel. Furthermore, the covering crimping piece 15 may be called an insulation barrel.

  The pair of conductor crimping pieces 14 and the pair of covering crimping pieces 15 are arranged at a predetermined interval in the terminal axis direction. Further, the pair of conductor crimping pieces 14 and the pair of covering crimping pieces 15 are formed in a shape in which the shape before caulking is both substantially V-shaped. In addition, since a pair of conductor crimping piece 14 crimps the conductor exposed part 7, and a pair of covering crimping piece 15 crimps the resin coating 6, these match with the difference of the shape and outer peripheral length of the object to be crimped. They are formed with different widths and protruding lengths.

  When the conductor exposed portion 7 is pressure-bonded to the caulking portion 9 as described above, an electric wire / terminal connecting portion as indicated by reference numeral 16 is formed. The electric wire / terminal connecting portion 16 includes a conductor crimping portion 17 formed by crimping the conductor exposed portion 7 with a pair of conductor crimping pieces 14, a non-caulking portion 18 around the conductor crimping portion 17, and a conductor A covering caulking portion 19 formed by caulking the resin coating 6 in the vicinity of the exposed portion 7 with a pair of covering caulking pieces 15 is formed.

  The connecting portion 10 is formed in a substantially bowl shape extending a predetermined length in the terminal axis direction. An electrical contact portion 8 is coupled to one end of the connecting portion 10 in the terminal axis direction. A caulking portion 9 is coupled to the other end of the connecting portion 10 in the terminal axial direction.

<About anticorrosion part 4>
1 and 2, the anticorrosion part 4 is formed as a part that covers the electric wire / terminal connection part 16 in a watertight manner to prevent electrolytic corrosion. Specifically, when the arrows in the figure are defined as up / down, left / right, and front / rear, the upper side of the crimping portion 9 (upper side of the conductor crimping portion 17 and the non-caulking portion 18) and the lower side of the crimping portion 9 (mounting) The anticorrosion part 4 is a part covering the lower side of the mounting part 13, the left and right sides of the crimping part 9, the front side of the crimping part 9 (front side of the conductor crimping part 17), and the rear side of the covering crimping part 19. It is formed. In other words, the anticorrosion part 4 is formed as a part covering the front and rear of the electric wire / terminal connection part 16 and the entire circumference around the terminal axis of the electric wire / terminal connection part 16. The anticorrosion part 4 is characterized by this formation method. Hereinafter, the formation method of the anticorrosion part 4 will be described in detail in the description which concerns on the manufacturing method of the terminal 1 with an electric wire.

<About the manufacturing method of the terminal 1 with an electric wire>
5 to 7, the terminal 1 with electric wire is manufactured through the following steps. That is, electric wire processing step S1, electric wire / terminal connection step S2, anticorrosive material supply step S3 (sealing material supply step, waterproof material supply step), and anticorrosion material hardening step S4 (sealing material hardening step, waterproof material hardening) Steps) are sequentially manufactured. The anticorrosive material supply step S3 and the anticorrosive material curing step S4 are steps (formation methods) for forming the anticorrosion part 4.

  In the wire processing step S <b> 1, the conductor exposed portion 7 is formed at the end of the aluminum wire 2. Specifically, the conductor coating 6 is exposed by removing the resin coating 6 by a predetermined length to form the conductor exposed portion 7.

  In the electric wire / terminal connection step S2, the crimping portion 9 of the crimp terminal 3 is disposed at the conductor exposed portion 7, and thereafter, the electric wire / terminal connection portion 16 is formed by crimp connection. In crimping, pressing by an anvil and a crimper of a crimping machine, that is, caulking is performed. When the conductor exposed portion 7 is crimped to the caulking portion 9, a conductor caulking portion 17, a non-caulking portion 18, and a covering caulking portion 19 are formed.

  In the anticorrosive material supply step S <b> 3, the anticorrosive material 20 (sealing material, waterproof material) is supplied to the electric wire / terminal connection portion 16. In the anticorrosive material supply step S3, an anticorrosive material supply device having the following configuration is used. The anticorrosive material supply device includes a dispenser having a metal nozzle 21 (electrostatic combination type dispenser), a voltage application unit 22 that applies a voltage between the metal nozzle 21 and the crimp terminal 3, and the dispenser and the voltage application unit 22 described above. And a control unit for controlling.

  The anticorrosion material 20 is a liquid ultraviolet curable resin. As the anticorrosion material 20, a material that emits light upon receiving ultraviolet energy is employed. In such an anticorrosive material 20, in the present invention, when a voltage is applied between the metal nozzle 21 and the crimp terminal 3, a positive charge is induced on the liquid surface. The voltage applied between the metal nozzle 21 and the crimp terminal 3 is about 3 kV in this embodiment. On the other hand, negative charges are induced on the crimp terminal 3 side.

  When a voltage is applied between the metallic nozzle 21 and the crimp terminal 3, the liquid interface of the anticorrosion material 20 is pulled by an electrostatic force in the direction of the electric lines of force. That is, the anticorrosion material 20 is attracted in a state of being charged in a direction from the metal nozzle 21 toward the electric wire / terminal connection portion 16. When the anticorrosion material 20 is pulled (pulled), the anticorrosion material 20 comes into contact with the electric wire / terminal connection portion 16 without the tip of the metal nozzle 21 getting wet. Specifically, the contact is made in a substantially continuous stringing state up to the portion where the electric field is concentrated.

  In the anticorrosive material supply step S3, the metal nozzle 21 is moved in the directions of arrows X, Y, and Z in FIGS. Since the anticorrosion material 20 is supplied in a charged state, such an anticorrosion material 20 is attracted to the electric wire / terminal connection portion 16 by electrostatic force, and then wraps around to the opposite side of the supply position. Supplied. That is, even if it is supplied from the upper side, the anticorrosion material 20 is supplied over the entire circumference that wraps around to the lower side of the electric wire / terminal connection part 16. The anticorrosive material 20 supplied over the entire circumference of the electric wire / terminal connection portion 16 stays in place without dripping due to the pulling force due to electrostatic force. In addition, the anticorrosion material 20 penetrates into the strands of the conductor 5 in the non-caulking portion 18 and stays there.

  In the anticorrosion material curing step S4, the anticorrosion material 20 supplied over the entire circumference of the electric wire / terminal connection portion 16 is irradiated with ultraviolet rays (UV light) to be UV cured. Since the anticorrosion material 20 is made of a liquid ultraviolet curable resin, for example, when receiving energy by the ultraviolet irradiation of the UV light 23, the anticorrosive material 20 is cured in a short time while maintaining the above-mentioned staying state. At this time, the anticorrosive 20 is cured without dripping or sinking. When the anticorrosion material 20 is cured, the formation of the anticorrosion part 4 that covers the electric wire / terminal connection part 16 in a watertight manner is completed. That is, manufacture of the terminal 1 with an electric wire is completed.

  In the anticorrosive material curing step S4, the anticorrosive material 20 emits light upon receiving ultraviolet energy, and therefore, the anticorrosive material 20 supplied to the electric wire / terminal connection portion 16 is supplied using the anticorrosive material 20 in the emitted state. Something is done to determine if the area is good or bad. That is, quality determination of the supply area is performed. A quality judgment device is used for quality judgment of the supply area. The pass / fail discrimination device includes a camera 24, an optical filter 25, a camera control unit (not shown), and a pass / fail discrimination unit 26.

  When the anticorrosion material 20 emits light in response to the energy of ultraviolet rays, the pass / fail determination device takes a picture of the anticorrosion material 20 in the lighted state with the camera 24, and the anticorrosion material with the pass / fail determination unit 26 based on the photographed image. Whether the supply area of 20 is good or bad is determined, and the determination result is output by, for example, a display or the like. The pass / fail discrimination device is arranged so that the optical filter 25 is interposed between the anticorrosive 20 and the camera 24. This is for clear imaging of the anticorrosive material 20 in a light emitting state while removing disturbance light generated when the ultraviolet rays are irradiated.

  The pass / fail determination device images the anticorrosion material 20 in a light-emitting state, and simultaneously determines the presence / absence of bubbles in the anticorrosion material 20 from this image. This determination is performed by the quality determination unit 26. The pass / fail discrimination device also outputs the discrimination result simultaneously by the display. Of course, if it can be determined that there are no bubbles in the anticorrosive 20, the bubbles will not burst when the anticorrosive 20 is cured.

  As can be seen from the above description, the anticorrosion part 4 can be formed in a sufficient state. Moreover, the anticorrosion part 4 can be formed in a shape in which the maximum width is W1 and the maximum height is H1. This is because the anticorrosion material 20 is supplied in a substantially stringed state as described above, so that the supply amount can be managed with high accuracy, and as a result, the shape of the anticorrosion portion 4 is stabilized. Moreover, it is because it forms after discriminating whether the supply area of the anticorrosive 20 is good or bad. The stabilization of the shape of the anticorrosion part 4 is effective for assembling the connector 51 described below.

<Example of use of terminal 1 with electric wire>
In FIG. 8, the terminal 1 with an electric wire is used as one component part of the connector 51 arrange | positioned at the terminal of a wire harness. The connector 51 includes a connector housing 52 having an insulating property in addition to the pair of terminals 1 with electric wires.

  8 and 9, the connector housing 52 is a resin molded product and is formed in a rectangular box shape. A pair of terminal accommodating chambers 53 are formed inside the connector housing 52. The terminal accommodating chamber 53 is formed so as to penetrate from the front surface to the rear surface of the connector housing 52. The terminal accommodating chamber 53 is formed with a lance 54 for hooking and locking the crimp terminal 3 (the locked portion 12) of the terminal 1 with electric wire. Further, the terminal accommodating chamber 53 is formed with a stopper portion 55 with which the crimp terminal 3 abuts and a tab insertion port 56 into which a tab of a mating terminal fitting (not shown) is inserted.

  The terminal accommodating chamber 53 is formed on the rear surface of the connector housing 52 so as to open with a width W2 and a height H2. The width W2 is larger than the maximum width W1 of the anticorrosion part 4 (W2> W1), and the height H2 is also larger than the maximum height H1 of the anticorrosion part 4 (H2> H1). That is, even if it is the terminal 1 with an electric wire which has the anticorrosion part 4, accommodation of the crimp terminal 3 with respect to the terminal accommodating chamber 53 has no problem.

  On the outside of the connector housing 52, a guide rib 57 and a locking arm 58 for a mating connector (not shown) are formed.

<About summary and effect of terminal 1 with electric wire>
As described above, as described with reference to FIGS. 1 to 9, the terminal with electric wire 1 includes the aluminum electric wire 2 and the crimp terminal 3. The aluminum electric wire 2 includes a conductor 5 made of aluminum or an aluminum alloy, and an insulating resin coating 6 that covers the conductor 5. In the aluminum electric wire 2, the resin coating 6 is removed to form a conductor exposed portion 7 (electric wire processing step S1). On the other hand, the crimp terminal 3 has a crimped portion 9 as a crimped portion, and a pair of conductor crimped pieces 14 and a coated crimped piece 15 are formed in the crimped portion 9. In the terminal 1 with electric wire, the caulking portion 9 is crimped to the conductor exposed portion 7 to form the electric wire / terminal connection portion 16 (electric wire / terminal connection step S2). And the anticorrosion part 4 is formed so that this electric wire and terminal connection part 16 may be covered.

  The anticorrosion part 4 is formed by supplying an anticorrosion material 20 made of an ultraviolet curable resin and emitting light upon receiving ultraviolet energy to the electric wire / terminal connection part 16 (corrosion prevention material supply step S3). Moreover, the anticorrosion part 4 is formed by irradiating the anticorrosion material 20 with ultraviolet rays by the UV light 23 and curing it (corrosion prevention material curing step S4). When the ultraviolet light is irradiated by the UV light 23, the camera 24 takes a picture while removing the disturbance light by the optical filter 25. And the quality of the supply area of the anticorrosion material 20 is determined from the image photographed by the camera 24, and the presence or absence of bubbles in the anticorrosion material 20 is also determined.

  According to the terminal 1 with an electric wire and this manufacturing method, the anticorrosion material 20 made of an ultraviolet curable resin is employed as described above. Therefore, if the anticorrosion material 20 is irradiated with ultraviolet rays, the anticorrosion material 20 is removed for a short time. Can be cured. That is, the anticorrosion part 4 can be formed in a short time without dripping or sinking.

  Moreover, according to the terminal 1 with an electric wire and this manufacturing method, since the anticorrosion material 20 which light-emits in response to the energy of ultraviolet rays is employ | adopted, it can make it easy to judge the quality regarding the supply area of the anticorrosion material 20. Moreover, according to the terminal 1 with an electric wire and this manufacturing method, since the light emission state of the anticorrosion material 20 is imaged, the quality determination regarding the supply area of the anticorrosion material 20 can be performed reliably. Moreover, according to the terminal 1 with an electric wire and this manufacturing method, since it arrange | positions so that the optical filter 25 may be interposed between the anticorrosion material 20 and the camera 24, the light emission state of the anticorrosion material 20 is removed, removing disturbance light. As a result, if such an image is used, it is possible to perform the quality determination relating to the supply area of the anticorrosive 20 more reliably. That is, if the supply of the anticorrosion material 20 is good, the anticorrosion part 4 can be formed in a sufficient state.

  Moreover, according to the terminal 1 with an electric wire and this manufacturing method, if the anticorrosion material 20 is irradiated with ultraviolet rays to emit light and imaged, the presence or absence of bubbles in the anticorrosion material 20 can be determined. And if it can discriminate | determine that a bubble does not exist in the anti-corrosion material 20, it can be considered that the formation state of the anti-corrosion part 4 is enough.

Therefore, according to this invention, there exists an effect that the manufacturing method of the terminal 1 with an electric wire with high manufacturability and high corrosion resistance can be provided.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Terminal with a wire, 2 ... Aluminum electric wire (electric wire), 3 ... Crimp terminal (terminal metal fitting), 4 ... Corrosion-proof part (sealing part, waterproof part), 5 ... Conductor, 6 ... Resin coating, 7 ... Conductor exposure part 8 ... Electrical contact part, 9 ... Clamping part, 10 ... Connecting part, 11 ... Elastic contact piece, 12 ... Locked part, 13 ... Mounting part, 14 ... Conductor staking piece, 15 ... Covering staking piece 16 ... Electric wire / terminal connection part, 17 ... Conductor caulking part, 18 ... Non caulking part, 19 ... Cover caulking part, 20 ... Anticorrosive material (sealing material, waterproofing material), 21 ... Metal nozzle, 22 DESCRIPTION OF SYMBOLS ... Voltage application part, 23 ... UV light, 23 ... UV light, 24 ... Camera, 25 ... Optical filter, 26 ... Pass / fail judgment part, 51 ... Connector, 52 ... Connector housing, 53 ... Terminal accommodation chamber, 54 ... Lance, 55 ... stopper, 56 ... tab insertion slot, 57 ... guide rib, 58 ... locking arm, S1 ... electric wire processing step, S2 ... electric wire / terminal connection step, S3 ... corrosion-proof material supply step (sealing material supply step, waterproof material supply step), S4 ... corrosion-proof material curing step (sealing) (Stick material curing process, waterproof material curing process)

Claims (3)

An electric wire processing step of forming a conductor exposed portion by removing the resin coating of the electric wire;
An electric wire / terminal connection step for forming an electric wire / terminal connection portion by connecting a terminal fitting to the position of the exposed conductor portion;
A sealing material supplying step of supplying a sealing material, which is made of an ultraviolet curable resin and receives ultraviolet energy, to emit light to form the sealing portion that covers the electric wire / terminal connection portion; ,
And manufacturing the sealing material including the sealing material curing step of UV curing by irradiating the ultraviolet light to the sealing material,
In the sealing material curing step, the sealing material in a state of being emitted by the irradiation of ultraviolet rays is photographed with a camera while removing disturbance light with an optical filter, and the sealing material is taken from an image photographed with the camera. A method for manufacturing a terminal with an electric wire, wherein the quality of a supply area of a stop material is determined. In the manufacturing method of the terminal with an electric wire according to claim 1,
As the sealing material curing step, the presence or absence of bubbles in the sealing material is determined from the image taken by the camera. In the manufacturing method of the terminal with an electric wire according to claim 1 or 2,
As the electric wire / terminal connection step, a conductor crimped portion obtained by crimping the conductor exposed portion with a conductor crimped piece of the terminal fitting, a non-crimped portion around the conductor crimped portion, and the conductor exposed portion Forming the electric wire / terminal connection portion in a range including a covering crimped portion formed by crimping the resin coating in the vicinity with a coating crimping piece of the terminal fitting, and covering the electric wire / terminal connection portion A manufacturing method of a terminal with an electric wire characterized by forming a sealing part .

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