JP2019036383A - Method of manufacturing terminal-equipped electric wire, terminal-equipped electric wire, and terminal crimping device - Google Patents

Abstract

To provide a method of manufacturing a terminal-equipped electric wire which improves winding properties of a conductor caulking piece to the electric wire.SOLUTION: The method of manufacturing a terminal-equipped electric wire includes a crimping step in which a first conductor caulking piece and a second conductor caulking piece of an electric wire connection portion are crimped to the electric wire by a second mold 113. A concave curved surface 117 of the second mold has a core side curved surface 117A, a coat side curved surface 117B, and an intermediate curved surface 117C connecting the core side curved surface and the coat side curved surface. In the core side curved surface, a skirt 117D on a side for guiding the first conductor caulking piece extends along an axial direction of the electric wire than a skirt 117E on a side for guiding the second conductor caulking piece toward the coat side curved surface, so that a first curved surface 117Afor guiding and curving the first conductor caulking piece is raised with respect to a second curved surface 117Afor guiding and curving the second conductor caulking piece.SELECTED DRAWING: Figure 8

Description

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

  Conventionally, there is a technique for crimping a terminal against an electric wire. In Patent Document 1, the crimping portion of the crimper includes a first arc surface, a second arc surface having a smaller radius of curvature than the first arc surface, and pressing of the crimper against the crimping piece of the terminal fitting from the first arc surface. A first flat surface continuous in a direction orthogonal to the direction, a step surface extending from the first flat surface along the pressing direction, and a second arc surface extending from the step surface in a direction orthogonal to the pressing direction. A technique of a terminal crimping device having a second flat surface is disclosed.

JP 2009-135032 A

  There is room for improvement in improving the winding property of the conductor crimping piece around the electric wire. For example, it is desirable to be able to improve the winding property when a conductor crimping piece is wound so as to integrally cover a core wire and a coating of an electric wire.

  The objective of this invention is providing the manufacturing method of the electric wire with a terminal which can improve the winding property of the conductor crimping piece with respect to an electric wire, the electric wire with a terminal, and a terminal crimping apparatus.

  In the method for manufacturing a terminal-attached electric wire according to the present invention, the first conductor included in the electric wire connecting portion of the crimp terminal so as to integrally cover the core wire and the covering with respect to the electric wire in which the tip end portion of the core wire is exposed from the covering. A crimping step of winding and crimping the crimping piece and the second conductor crimping piece around the electric wire, wherein the first mold supports the electric wire connecting portion and the electric wire, and the first mold A second mold relatively moving with respect to the first conductor crimping piece is wound around the core wire and the coating, and the second conductor crimping piece is outside the first conductor crimping piece. The second mold has a concave curved surface that faces the first mold and guides the first conductor crimping piece and the second conductor crimping piece. The curved surface is a core-side curved surface corresponding to the core wire, and a covered surface corresponding to the coating. A side curved surface, and an intermediate curved surface that connects the core side curved surface and the covering side curved surface, and the skirt on the side that guides the first conductor crimping piece in the core side curved surface, The first conductor crimping piece is guided by extending toward the covering side curved surface along the axial direction of the electric wire from the skirt portion on the side guiding the second conductor crimping piece. The first curved surface to be bent is raised with respect to the second curved surface to guide and curve the second conductor crimping piece.

  The method of manufacturing a terminal-attached electric wire according to the present invention includes a first conductor adder included in the wire connecting portion of the crimp terminal so as to integrally cover the core wire and the covering with respect to the electric wire whose tip end portion is exposed from the covering. A crimping step in which the clamp piece and the second conductor crimping piece are wound around the electric wire and crimped. In the crimping step, the first mold supports the electric wire connection portion and the electric wire, the second mold that moves relative to the first mold winds the first conductor crimping piece around the core wire and the coating, and The second conductor crimping piece is wound around the outside of the first conductor crimping piece.

  The second mold has a concave curved surface that faces the first mold and guides the first conductor crimping piece and the second conductor crimping piece. The curved surface has a core-wire-side curved surface corresponding to the core wire, a coating-side curved surface corresponding to the coating, and an intermediate curved surface connecting the core-wire-side curved surface and the coating-side curved surface. In the core-side curved surface, the skirt on the side guiding the first conductor crimping piece is covered with the coating-side curved surface along the axial direction of the electric wire from the skirt on the side guiding the second conductor crimping piece. The first curved surface that guides and curves the first conductor crimping piece by the extension toward the second curved surface that guides and curves the second conductor crimping piece. It is raised.

  According to the method of manufacturing a terminal-attached electric wire according to the present invention, the core-wire-side curved surface overlaps the two conductor crimping pieces while suppressing the collision between the first conductor crimping piece and the second conductor crimping piece. The wire can be wound around. By smoothly winding the core wire side curved surface, the subsequent winding by the intermediate curved surface and the covering side curved surface is improved. Therefore, the manufacturing method of the electric wire with a terminal concerning the present invention produces the effect that the winding nature of the conductor crimping piece to the electric wire can be improved.

Drawing 1 is a perspective view showing the state before crimping of the crimp terminal concerning an embodiment. FIG. 2 is a side view showing a state before crimping of the crimp terminal according to the embodiment. FIG. 3 is a perspective view illustrating the crimp terminal according to the embodiment after crimping. FIG. 4 is a side view showing the crimp terminal according to the embodiment after crimping. FIG. 5 is a perspective view illustrating a state before the pasting process is performed in the crimp terminal according to the embodiment. FIG. 6 is a plan view showing a state in which a water stop member is affixed to the crimp terminal according to the embodiment. FIG. 7 is a perspective view showing first and second molds according to the embodiment. FIG. 8 is a bottom view of the second mold according to the embodiment. FIG. 9 is a perspective view of the second mold according to the embodiment as viewed from below. FIG. 10 is a cross-sectional view along the first direction in the second mold according to the embodiment. FIG. 11 is a cross-sectional view of the second mold according to the embodiment. FIG. 12 is another cross-sectional view of the second mold according to the embodiment. FIG. 13 is still another cross-sectional view of the second mold according to the embodiment. FIG. 14 is a cross-sectional view illustrating the crimping process of the embodiment. FIG. 15 is another cross-sectional view illustrating the crimping process of the embodiment. FIG. 16 is still another cross-sectional view illustrating the crimping process of the embodiment. FIG. 17 is still another cross-sectional view illustrating the crimping process of the embodiment. FIG. 18 is still another cross-sectional view illustrating the crimping process of the embodiment. FIG. 19 is a plan view showing the terminal-attached electric wire according to the embodiment. FIG. 20 is a perspective view illustrating the terminal-attached electric wire according to the embodiment. FIG. 21 is a cross-sectional view showing the terminal-attached electric wire according to the embodiment. FIG. 22 is a front view of a second mold according to a first modification of the embodiment. FIG. 23 is a front view illustrating a crimping process according to a first modification of the embodiment. FIG. 24 is another front view showing the crimping process according to the first modification of the embodiment. FIG. 25 is still another front view showing the crimping process according to the first modified example of the embodiment. FIG. 26 is still another front view showing the crimping process according to the first modification of the embodiment.

  Below, it demonstrates in detail, referring drawings for the manufacturing method of the electric wire with a terminal concerning the embodiment of the present invention, the electric wire with a terminal, and a terminal crimping device. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
The embodiment will be described with reference to FIGS. The present embodiment relates to a method for manufacturing an electric wire with a terminal, an electric wire with a terminal, and a terminal crimping apparatus. 1 is a perspective view showing a state before crimping of a crimp terminal according to the embodiment, FIG. 2 is a side view showing a state before crimping of the crimp terminal according to the embodiment, and FIG. 3 is a crimp terminal according to the embodiment. FIG. 4 is a side view of the crimp terminal according to the embodiment after crimping, and FIG. 5 is a perspective view of the crimp terminal according to the embodiment before a sticking step is performed. FIG. 6, FIG. 6 is a plan view showing a state in which a water stop member is attached to the crimp terminal according to the embodiment, FIG. 7 is a perspective view showing first and second molds according to the embodiment, and FIG. FIG. 9 is a perspective view of the second mold according to the embodiment as viewed from below, and FIG. 10 is a first direction of the second mold according to the embodiment. FIG. 11 is a sectional view of the second mold of the embodiment, and FIG. 12 is another section of the second mold of the embodiment. 13 is a still another cross-sectional view of a second mold embodiment.

  10 shows the XX cross section of FIG. 8, FIG. 11 shows the XI-XI cross section of FIG. 8, FIG. 12 shows the XII-XII cross section of FIG. 8 shows the XIII-XIII cross section of FIG. 8, and FIG. 21 shows the XXI-XXI cross section of FIG.

  First, the crimp terminal 1 according to the present embodiment will be described. The crimp terminal 1 shown in FIG. 1 and the like is a terminal that is crimped to the electric wire 50. The crimp terminal 1 is electrically connected to a mating terminal (not shown) in a state of being integrated with the electric wire 50. In the wire 50 to be crimped, the covering 52 at the end is removed and the core wire 51 is exposed for a predetermined length. The core wire 51 may be an assembly of a plurality of strands or a single wire such as a coaxial cable. The crimp terminal 1 is electrically connected to the exposed core wire 51 by being crimped to the end of the electric wire 50.

  The crimp terminal 1 includes a terminal fitting 10 and a water stop member 20. The terminal fitting 10 is a main part of the crimp terminal 1. The terminal fitting 10 is formed from a conductive metal plate (for example, a copper plate or a copper alloy plate) as a base material. The terminal fitting 10 is formed in a predetermined shape that can be connected to the mating terminal and the electric wire 50 by punching or bending the base material. The terminal fitting 10 has a terminal connection portion 11 and a wire connection portion 12. The terminal connection part 11 is a part electrically connected with the other party terminal. The wire connection portion 12 is a portion that is crimped to the wire 50 and is electrically connected to the core wire 51.

  A connecting portion 13 is provided between the terminal connecting portion 11 and the wire connecting portion 12. In other words, the terminal connection part 11 and the wire connection part 12 are connected via the connection part 13. The connecting portion 13 has side walls 13 a and 13 a that connect the side walls 11 a and 11 a of the terminal connecting portion 11 and the barrel pieces 15 and 16 that are the side walls of the wire connecting portion 12. One side wall 13 a connects one side wall 11 a and the first barrel piece 15, and the other side wall 13 a connects the other side wall 11 a and the second barrel piece 16. The height of the side wall 13a is lower than the height of the barrel pieces 15 and 16 and the side wall 11a. More specifically, the height of the side wall 13a decreases as it goes from the terminal connection portion 11 to the wire connection portion 12.

  The terminal fitting 10 may be a male terminal or a female terminal. The terminal connection portion 11 is molded into a male shape when the terminal fitting 10 is a male terminal, and is molded into a female shape when the terminal fitting 10 is a female terminal.

  In the description of the crimp terminal 1, the connection direction with the counterpart terminal, that is, the insertion direction with the counterpart terminal is referred to as a first direction L. The first direction L is the longitudinal direction of the crimp terminal 1. The width direction of the crimp terminal 1 is referred to as a second direction W. In the crimp terminal 1, a direction orthogonal to both the first direction L and the second direction W is referred to as a third direction H. The third direction H is the height direction of the crimp terminal 1. The electric wire connection part 12 is crimped | bonded with respect to the electric wire 50 by the 2nd metal mold | die 113 which moves along the 3rd direction H so that it may mention later.

  In the molding process, the crimp terminal 1 is molded into a flat plate shape, and from this state, in the terminal connection part molding process, the terminal connection part 11 is formed in a cylindrical shape as shown in FIG. In the terminal connection portion forming step, the terminal connection portion 11 is bent. The terminal connection part 11 of this embodiment is formed in a cylindrical shape having a rectangular cross section. The electric wire connection part 12 is shape | molded so that a cross-sectional shape may become U shape in an electric wire connection part shaping | molding process. In the electric wire connection part forming step, the electric wire connection part 12 is bent. Moreover, the water stop member 20 is affixed to the electric wire connection part 12 in an affixing process. The pasting step may be executed before the wire connection portion forming step or after the wire connection portion forming step.

  As shown in FIGS. 1 and 6, the electric wire connecting portion 12 has a bottom portion 14, a first barrel piece portion 15, and a second barrel piece portion 16. The bottom part 14 is a part that becomes the bottom wall of the wire connection part 12 formed in a U shape. An end portion of the electric wire 50 is placed on the bottom portion 14 during the crimping process. The 1st barrel piece part 15 and the 2nd barrel piece part 16 are the site | parts used as the side wall of the electric wire connection part 12 formed in the U shape. The first barrel piece 15 and the second barrel piece 16 are connected to the end of the bottom portion 14 in the second direction W. As shown in FIG. 1, the first barrel piece 15 and the second barrel piece 16 protrude from the end portion in the width direction of the bottom portion 14 in a direction intersecting with the width direction. In the wire connection portion 12 formed in a U shape, when the end portion of the electric wire 50 is placed on the bottom portion 14, the first barrel piece portion 15 and the second barrel piece portion 16 are electrically connected from both sides in the second direction W. Surround 50.

  The first barrel piece 15 and the second barrel piece 16 may have the same length from the base on the bottom 14 side to the end surfaces of the tips 15a and 16a, and one length is longer than the other. Also good. In the crimp terminal 1 of the present embodiment, the length from the root to the tip 16 a in the second barrel piece 16 is longer than the length from the root to the tip 15 a in the first barrel piece 15. For example, the first barrel piece 15 and the second barrel piece 16 are wound around the electric wire 50 while overlapping each other. In the present embodiment, the second barrel piece 16 overlaps the outside of the first barrel piece 15.

  The end of the electric wire 50 is inserted into the U-shaped inner space from the U-shaped opening of the electric wire connecting portion 12, that is, the gap between the tips 15a and 16a. The wire connection portion 12 is formed so that the end of the wire 50 can be easily inserted. Specifically, as for the electric wire connection part 12, the space | interval of the 2nd direction W of the 1st barrel piece part 15 and the 2nd barrel piece part 16 is expanding as it goes to the end surface of the front-end | tip 15a, 16a from the bottom part 14 side.

  As shown in FIGS. 2 to 6, the first barrel piece 15 and the second barrel piece 16 have a connection crimping part 12 </ b> C interposed between the core crimping part 12 </ b> A and the covering crimping part 12 </ b> B. Each of the first barrel piece 15 and the second barrel piece 16 is a single piece in which the crimping parts 12A, 12C, and 12B are continuous along the first direction L in this order.

  In the present embodiment, in the first direction L, the terminal connection portion 11 side viewed from the wire connection portion 12 is referred to as “front side”, and the wire connection portion 12 side viewed from the terminal connection portion 11 is referred to as “rear side”.

  The core wire crimping portion 12 </ b> A is a portion that is crimped to the core wire 51 at the tip of the electric wire 50. 12 A of core wire crimping | compression-bonding parts are the parts near the connection part 13 in each barrel piece part 15 and 16. FIG. That is, the core wire crimping part 12 </ b> A is the foremost part of the wire connecting part 12. The coated crimping part 12 </ b> B is a part that is crimped to the end of the coating 52. The covering crimping part 12B is a part located on the most rear side in each barrel piece part 15,16. 12 C of connection crimping | compression-bonding parts are site | parts which connect 12 A of core wire crimping parts, and the covering crimping | compression-bonding part 12B. 12 C of connection crimping parts are crimped | bonded with respect to the boundary part of the core wire 51 and the coating | coated 52 in the electric wire 50. FIG. The electric wire connection part 12 integrally covers the core wire 51 and the covering 52 by being crimped to the electric wire 50. The electric wire connection part 12 is wound around the electric wire 50 and is crimped, whereby the electric wire 2 with a terminal shown in FIGS.

  As shown in FIGS. 5 and 6, a serration region 17 is provided on the inner wall surface of the electric wire connecting portion 12, that is, the wall surface on the side covering the electric wire 50. The serration region 17 is a core wire holding region that holds the core wire 51. The serration region 17 is a region including a portion wound around the core wire 51 on the inner wall surface of the electric wire connection portion 12. In the serration region 17, a plurality of recesses, a plurality of projections, or a combination of recesses and projections is arranged. A recessed part or a convex part increases the contact area of the electric wire connection part 12 and the core wire 51, and raises the adhesive strength of both. The serration region 17 of the present embodiment is a rectangular region, and a plurality of recesses 17a are formed at different positions in the first direction L.

  Here, it is not preferable that water permeates between the core wire 51 and the wire connecting portion 12 crimped to the core wire 51. For example, when the metal material of the core wire 51 and the metal material of the wire connection part 12 are different in the magnitude of the ionization tendency, there is a possibility of corrosion. As an example, when the material of the core wire 51 is aluminum and the material of the wire connection portion 12 is copper, the core wire 51 may be corroded. The crimp terminal 1 of the present embodiment is provided with a water stop member 20. The water stop member 20 suppresses the intrusion of water between the electric wire connecting portion 12 and the core wire 51.

  The water stop member 20 is a member formed in a sheet shape mainly including an adhesive such as an acrylic adhesive. As the water stop member 20 of this embodiment, a pressure-sensitive adhesive sheet formed by soaking a sheet-like nonwoven fabric with a pressure-sensitive adhesive and having a pressure-sensitive adhesive effect on both sides is used.

  The water stop member 20 is affixed, for example with respect to the inner wall surface of the flat wire connection part 12 shown in FIG. As shown in FIG. 6, the water stop member 20 is formed in a predetermined shape and includes a first water stop portion 21, a second water stop portion 22, and a third water stop portion 23. The first water stop portion 21 stops the portion where the first barrel piece portion 15 and the second barrel piece portion 16 overlap after completion of the pressure bonding. That is, the first water stop portion 21 is sandwiched between the first barrel piece portion 15 and the second barrel piece portion 16 that overlap each other to form a water stop region between the barrel piece portions 15 and 16. The first water stop portion 21 of the present embodiment is disposed in the second barrel piece portion 16 and extends along the first direction L.

  The second water stop portion 22 stops the terminal connection portion 11 from the tip of the core wire 51. The second water stop portion 22 is disposed at the end portion of the electric wire connection portion 12 on the terminal connection portion 11 side, and extends along the second direction W. It is desirable that at least a part of the second water stop portion 22 is provided in a region where the core wire 51 is placed. The 2nd water stop part 22 forms a water stop area | region in the clearance gap between the barrel piece parts 15 and 16 by being pinched | interposed between the overlapping barrel piece parts 15 and 16, for example. The 2nd water stop part 22 can also block the clearance gap by the side of the terminal connection part 11 rather than the front-end | tip of the core wire 51 by mutually overlapping in a crimping | compression-bonding process. The second water stop portion 22 suppresses water immersion from the terminal connection portion 11 side between the wire connection portion 12 and the core wire 51.

  The third water stop portion 23 suppresses the intrusion of water from the gap between the wire connecting portion 12 and the covering 52. The third water stop portion 23 is disposed at the end of the electric wire connection portion 12 opposite to the terminal connection portion 11 side, and extends along the second direction W. The third water stop portion 23 is sandwiched between the sheath 52 and the wire connection portion 12, thereby forming a water stop region between the sheath 52 and the wire connection portion 12.

  The terminal fitting 10 shown above is processed into a form having a flat wire connecting portion 12 shown in FIG. 5 through a pressing process for a single metal plate as a base material. In the subsequent attaching step, the water stop member 20 is attached to the flat wire connecting portion 12. Thereafter, the terminal fitting 10 is formed with a U-shaped wire connecting portion 12 in the wire connecting portion forming step.

  The crimping process is performed by the terminal crimping apparatus 100 having the first mold 112 and the second mold 113 shown in FIG. The terminal crimping device 100 is a device called an applicator in this technical field.

  The first mold 112 and the second mold 113 are paired. The 1st metal mold | die 112 and the 2nd metal mold | die 113 are arrange | positioned at intervals in the up-down direction. As shown in FIG. 7, the first mold 112 and the second mold 113 sandwich the crimp terminal 1 and the electric wire 50 so that the crimp terminal 1 is crimped to the electric wire 50. The first mold 112 is a mold that supports the crimp terminal 1 from below. The first mold 112 is formed with two lower molds, and has a first anvil 112A as a first lower mold and a second anvil 112B as a second lower mold. The first anvil 112A and the second anvil 112B are integrally molded, for example. The second mold 113 is disposed above the first mold 112. The second mold 113 is formed with two upper molds, and has a first crimper 113A as a first upper mold and a second crimper 113B as a second upper mold. The terminal crimping device 100 includes a driving device that moves the second mold 113 up and down along the third direction H.

  The first anvil 112A and the first crimper 113A face each other in the vertical direction. The first anvil 112A and the first crimper 113A cause the core wire crimping portion 12A to be crimped. That is, the first anvil 112 </ b> A and the first crimper 113 </ b> A are wound with the U-shaped core wire crimping portion 12 </ b> A around the core wire 51 of the electric wire 50 by crimping the core wire 51.

  The second anvil 112B and the second crimper 113B face each other in the vertical direction. The second anvil 112B and the second crimper 113B cause the coated crimping part 12B to be crimped. That is, the second anvil 112 </ b> B and the second crimper 113 </ b> B are wound with the U-shaped covering crimping part 12 </ b> B around the covering 52 and are crimped to the covering 52 by narrowing the interval between them.

As shown in FIG. 7, the first anvil 112 </ b> A and the second anvil 112 </ b> B are formed with concave surfaces 112 </ b> A ₁ and 112 </ b> B _{1 that} are recessed downward at the respective upper ends. Each concave surface 112A ₁ , 112B ₁ is formed so that the cross-sectional shape is an arc shape in accordance with the shape of each bottom portion 14 of the U-shaped core wire crimping portion 12A and the U-shaped covering crimping portion 12B. Yes. In the terminal crimping apparatus 100, each concave surface 112A ₁ , 112B ₁ is a crimping position. Crimp terminal 1 for the bottom 14 have been supplied in the bottom, the bottom 14 of the core wire crimping portion 12A is placed on the concave surface 112A ₁ of the first anvil 112A, bottom 14 of the insulation crimp portion 12B is a second anvil 112B It is placed on the concave surface 112B _1. The first mold 112 is supported by the base of the terminal crimping apparatus 100 with the concave surfaces 112A ₁ and 112B ₁ exposed upward.

As shown in FIG. 7, the first crimper 113A and the second crimper 113B are respectively formed with concave portions 113A ₁ and 113B _{1 that} are recessed upward. Each recess 113A _1, 113B ₁ are disposed opposite in the vertical direction with respect to each of the concave surfaces 112A _1, 112B ₁ of the first anvil 112A and second anvil 112B. The second mold 113 has first and second wall surfaces 115 and 116 and a curved surface 117. The first wall surface 115 and the second wall surface 116 face each other in the second direction W. The first wall surface 115 and the second wall surface 116 are curved so that the distance between them in the second direction W increases as it goes downward.

The curved surface 117 connects the upper ends of the first and second wall surfaces 115 and 116. The curved surface 117 is a surface facing the first mold 112 in the third direction H, and is curved in a direction away from the first mold 112. Each concave portion 113A ₁ , 113B ₁ has the first barrel piece 15 and the first wall piece 15 and the second wall piece 116 in contact with the first wall piece 115, the second wall surface 116, and the curved surface 117. The second barrel piece 16 is crimped while being wound around the end of the electric wire 50. Each recess 113A _1, 113B ₁ is formed to allow such crimping operation.

  As shown in FIG. 8, the curved surface 117 includes a core-side curved surface 117A, a covering-side curved surface 117B, and an intermediate curved surface 117C. The core-wire-side curved surface 117A is positioned on the most front side in the first direction L on the curved surface 117. The covering-side curved surface 117B is located on the most rear side in the first direction L on the curved surface 117. The intermediate curved surface 117C connects the core-side curved surface 117A and the covering-side curved surface 117B.

  The core side curved surface 117 </ b> A is a portion corresponding to the first crimper 113 </ b> A, and the first barrel piece 15 and the second barrel piece 16 are wound around the core 51 of the electric wire 50. The covering side curved surface 117 </ b> B is a portion corresponding to the second crimper 113 </ b> B and winds the first barrel piece 15 and the second barrel piece 16 around the covering 52 of the electric wire 50. The intermediate curved surface 117 </ b> C winds the first barrel piece 15 and the second barrel piece 16 around the boundary portion between the core wire 51 and the coating 52 in the electric wire 50.

  As shown in FIG. 8, the width Wd2 at the skirt of the covering-side curved surface 117B is wider than the width Wd1 at the skirt of the core-side curved surface 117A. The width Wd3 at the skirt portion of the intermediate curved surface 117C becomes wider from the front side toward the rear side. The skirt portion on the curved surface 117 is a boundary portion between the first wall surface 115 and the second wall surface 116 on the curved surface 117.

  In the curved surface 117 of this embodiment, in the core-side curved surface 117A, the first skirt portion 117D extends from the second skirt portion 117E along the first direction L toward the covering-side curved surface 117B. The first skirt portion 117D is a skirt portion on the first wall surface 115 side in the core-side curved surface 117A. That is, the first skirt portion 117D is a skirt portion on the side that guides the first barrel piece 15 in the core-side curved surface 117A. The second skirt portion 117E is a skirt portion on the second wall surface 116 side in the core side curved surface 117A. That is, the second skirt 117E is a skirt on the side that guides the second barrel piece 16 in the core-side curved surface 117A. Thus, the first skirt portion 117D extends to the rear side of the second skirt portion 117E.

  As described below, in the second mold 113 of the present embodiment, a step is formed on the curved surface 117 by extending the first skirt 117D toward the rear side of the second skirt 117E. ing. This step improves the winding of the barrel pieces 15 and 16.

As shown in FIG. 8, the position (range) R1 of the intermediate curved surface 117C at the skirt portion on the first wall surface 115 side is the position (range) R2 of the intermediate curved surface 117C at the skirt portion on the second wall surface 116 side. It is shifted to the rear side. Then, a step is formed between the first curved surface 117A ₁ according to the deviation between the position R2 and the position R1 and the second curved surface 117A _2.

As shown in FIGS. 11 to 13, the first curved surface 117 </ b> A ₁ is a curved surface continuous with the first wall surface 115. In a first wall 115, the upper end 115U connected to the first curved surface 117A ₁ are substantially planar. The first curved surface 117A ₁ is curved toward the second wall surface 116 side toward the upper side. The first curved surface 117A ₁ may be curved to guide the first barrel piece 15.

As shown in FIGS. 11 to 13, the second curved surface 117 </ _b > A ₂ is a curved surface continuous with the second wall surface 116. In a second wall 116, the upper end 116U connected to the second curved surface 117A ₂ is substantially planar. The second curved surface 117A ₂ is curved toward the first wall face 115 side toward the upper side. The second curved surface 117A ₂ guides and curves the second barrel piece 16. The second curved surface 117A ₂ extends to the first wall surface 115 side than the center line C1. The center line C1 is a center line in the second direction W in the concave portions 113A ₁ and 113B ₁ . The center line C1 is an imaginary line in the third direction H that passes through an intermediate position between the upper end 115U of the first wall 115 and the upper end 116U of the second wall 116.

As shown in FIG. 12, the second curved surface 117A ₂ has an adjusting portion 117A ₆ . The adjusting portion 117A ₆ is a portion that adjusts the winding timing of the second barrel piece 16. Degree of curvature of the adjusting portion 117A ₆ is smaller than the degree of curvature of the adjacent portions of the second curved surface 117A _2. Adjusting portion 117A ₆ of the present embodiment has a substantially planar. Adjusting portion 117A ₆ is formed in the vicinity of the center line C1. Adjusting portion 117A ₆ is provided around the center line C1 in a predetermined range in the second direction W.

The first curved surface 117A ₁ is raised relative to the second curved surface 117A _2. The first curved surface 117A _1, rather than the second curved surface 117A ₂ are raised toward the second wall surface 116 side. As shown in FIG. 12, a first curved surface 117A ₁ are raised toward the second wall surface 116 side with respect to the virtual line 117A _4. Phantom lines 117A ₄ shows a wall position when obtained by inverting the second curved surface 117A ₂ with respect to the center line C1. In other words, the first curved surface 117A _1, the distance from the center line C1 than the second lower end portion 117A ₅ of the curved surfaces 117A ₂ of the short. At the same position in the third direction H, the distance Wd4 the second direction W from the first curved surface 117A ₁ and the center line C1, the distance of the second direction W from the second curved surface 117A ₂ to the center line C1 It is shorter than Wd5. Also, toward the inner portion of the concave portion 113A _1, the ratio of the distance Wd4 decreases relative to the distance WD5.

In the second mold 113 of the present embodiment, the shape of the first curved surface 117A ₁ corresponds to the shape of the imaginary line 117A ₄ . That is, the first curved surface 117A ₁ has a shape that moves the imaginary line 117A ₄ downward.

The first curved surface 117A ₁ and the second curved surface 117A ₂ are connected via an inclined surface 117A _3. Inclined surfaces 117A ₃ are curved to the first curved surface 117A ₁ and the second curved surface 117A ₂ smoothly continuous respectively. In the inclined surface 117A _3, the shape of the connecting portion between the first curved surface 117A ₁ is a convex curved shape towards the second wall surface 116 side. Further, the inclined surface 117A _3, the shape of the connecting portion between the second curved surfaces 117A ₂ is a concave curved shape towards the side away from the second wall 116.

As shown in FIG. 11, in the front region of the first direction L in the first crimper 113A, a first curved surface 117A ₁ and the second step on the curved surface 117A ₂ Not provided. In the front region in the first direction L, the shape of the core-side curved surface 117A is symmetric with respect to the center line C1.

Further, as shown in FIG. 13, in the second crimper 113B, a first curved surface 117B1 second step on the curved surface 117B ₂ of not provided. In the second crimper 113B, the shape of the covering-side curved surface 117B is symmetric with respect to the center line C1.

(Crimping process)
In the crimping step, as shown in FIG. 14, the wire connecting portion 12 and the wire 50 are placed on the first mold 112. In the present embodiment, a bent portion 15 b is provided on the first barrel piece 15 in the wire connecting portion 12 before crimping. The 1st barrel piece part 15 is bent toward the 2nd barrel piece part 16 side in the bending part 15b. The bending angle at the bent portion 15b is determined so that the winding of the first barrel piece 15 in the crimping process proceeds smoothly.

  The terminal crimping apparatus 100 lowers the second mold 113 toward the first mold 112 as indicated by an arrow Y1. The first wall surface 115 is in contact with the first barrel piece 15, and the second wall surface 116 is in contact with the second barrel piece 16. The second mold 113 supports the wire connecting portion 12 from both sides in the second direction W by the two wall surfaces 115 and 116. The first wall surface 115 contacts, for example, the bent portion 15b of the first barrel piece 15 and presses the bent portion 15b toward the second barrel piece 16 side. The second wall surface 116 contacts, for example, the tip 16a of the second barrel piece 16 and presses the tip 16a toward the first barrel piece 15 side.

When the second mold 113 is further lowered, the tip 16a of the second barrel piece 16 comes into contact with the upper end 116U of the second wall 116 as shown in FIG. The upper end 116U guides the second barrel piece 16 toward the second curved surface 117A _2. Further, the bent portion 15 b of the first barrel piece 15 contacts the upper end portion 115 U of the first wall surface 115. The upper end 115U is guided toward the first barrel piece 15 to the first curved surface 117A _1.

When the second mold 113 is further lowered, as shown in FIG. 16, the leading end 16a of the second barrel piece 16 contacts the second curved surface 117A _2. The second curved surface 117A ₂ guides and curves the second barrel piece 16. More specifically, the second curved surface 117A ₂ curves the second barrel piece 16 so that the tip 16a faces the first barrel piece 15 side. The second barrel piece 16, while being guided by the second curved surface 117A _2, and the first barrel piece 15 side is deformed convexly curved shape toward the opposite side. The second barrel piece 16, by being guided by the second curved surface 117A _2, Yuku is gradually fell dramatically toward the first wall surface 115 side.

16, the first barrel piece 15 is shown the state before contacting the first curved surface 117A _1. The first barrel piece portion 15 is guided by the upper end portion 115U, and has not started to fall toward the second wall surface 116 side. Thus, in the crimping process according to the present embodiment, the second barrel piece 16 starts to fall before the first barrel piece 15 falls.

When the second mold 113 is further lowered, as shown in FIG. 17, the leading end 16a of the second barrel piece 16 is brought into contact with the regulating portion 117A _6. Adjusting portion 117A ₆ causes the slide tip 16a along the second direction W. While the tip 16a is in contact with the regulating portion 117A ₆ is curve progression is stopped in the second barrel piece 16, or the curve progression is slowed. Figure 17 is a bent portion 15b of the first barrel piece 15 is shown the state has reached the first lower end of the curved surface 117A _1.

When the second mold 113 is further lowered, the first barrel piece 15 starts to fall toward the second wall surface 116 as shown in FIG. The first curved surface 117A ₁ guides the first barrel piece 15, to tilt down toward the first barrel piece 15 to the second wall surface 116 side. The first curved surface 117A ₁ of this embodiment is raised relative to the second curved surface 117A _2. Therefore, the first curved surface 117 </ b> A ₁ can cause the first barrel piece 15 to enter the lower side of the second barrel piece 16. In other words, the first curved surface 117 </ b> A ₁ causes the first barrel piece 15 to enter the core wire 51 side, that is, the inner side than the second barrel piece 16. Therefore, in the crimping process of the present embodiment, the collision between the first barrel piece 15 and the second barrel piece 16 is suppressed.

As a comparative example, it is assumed that the first curved surface 117A ₁ performs compression process by the second die 113 that is not raised relative to the second curved surface 117A _2. In this case, the tip 15a of the first barrel piece 15 and the tip 16a of the second barrel piece 16 are likely to collide. This collision may cause buckling of the barrel pieces 15 and 16 and peeling of the plating. On the other hand, according to the manufacturing method of the electric wire with a terminal of this embodiment, buckling and plating peeling of the barrel pieces 15 and 16 due to the collision between the first barrel piece 15 and the second barrel piece 16 are suppressed. Is done.

  Further, since the collision between the first barrel piece 15 and the second barrel piece 16 hardly occurs, the entanglement of the barrel pieces 15 and 16 is improved. Since the 1st barrel piece part 15 penetrates into the core wire 51 side more smoothly than the 2nd barrel piece part 16, winding of the 1st barrel piece part 15 around the core wire 51 is performed favorably. Further, the second barrel piece 16 is wound well around the outside of the first barrel piece 15. As a result, it is possible to improve the electrical performance between the wire connecting portion 12 and the core wire 51 and to improve the holding force.

  In the crimping process, the winding of the core crimping part 12A around the electric wire 50 precedes the winding of the connecting crimping part 12C and the covering crimping part 12B. In other words, the timing at which the first barrel piece 15 and the second barrel piece 16 begin to overlap each other is the earliest in the core wire crimping portion 12A. In the method for manufacturing the electric wire with terminal according to the present embodiment, the collision of the barrel pieces 15 and 16 in the core wire crimping portion 12A is effectively suppressed. Therefore, winding of the barrel pieces 15 and 16 around the electric wire 50 starts smoothly. As a result, the other crimping portions 12C and 12B are smoothly wound around the electric wire 50. Therefore, the method of manufacturing the terminal-attached electric wire according to the present embodiment can improve the winding property of the barrel pieces 15 and 16 around the electric wire 50.

  FIG. 19 is a plan view of an electric wire with a terminal manufactured by the method for manufacturing an electric wire with a terminal according to the present embodiment, and FIG. 20 is a perspective view of the electric wire with a terminal manufactured by the manufacturing method of the electric wire with a terminal according to the present embodiment. FIG. 21 is a cross-sectional view of a terminal-attached electric wire manufactured by the method of manufacturing a terminal-attached electric wire according to the present embodiment.

  The terminal-attached electric wire 2 includes an electric wire 50 and a crimp terminal 1. The crimp terminal 1 includes a wire connecting portion 12 having a first barrel piece 15 and a second barrel piece 16. The first barrel piece 15 is a first conductor crimping piece that is wound around the core wire 51 and the sheath 52 of the electric wire 50 and integrally covers the core wire 51 and the sheath 52. The second barrel piece 16 is a second conductor crimping piece wound around the outside of the first barrel piece 15.

  The wire connection portion 12 includes a core wire crimping portion 12A that is crimped to the core wire 51, a coating crimping portion 12B that is crimped to the coating 52, and a connecting crimping portion 12C that connects the core wire crimping portion 12A and the coating crimping portion 12B. And having. The shape of the second mold 113 is transferred to the wire connecting portion 12. The width of the core crimping part 12A in the second direction W is smaller than the width of the covering crimping part 12B. The width of the core wire crimping portion 12A corresponds to the width Wd1 (see FIG. 8) at the skirt portion of the core wire-side curved surface 117A of the second mold 113. The width of the covering crimping portion 12B corresponds to the width Wd2 (see FIG. 8) at the skirt portion of the covering-side curved surface 117B of the second mold 113. As can be seen from FIG. 19, the width of the connecting crimping portion 12 </ b> C increases along the first direction L from the core crimping portion 12 </ b> A side toward the covering crimping portion 12 </ b> B side. The width of the connecting crimping portion 12C corresponds to the width Wd3 (see FIG. 8) at the skirt portion of the intermediate curved surface 117C of the second mold 113.

As shown in FIGS. 19 to 21, in the core wire crimping portion 12 </ b> A of the first barrel piece 15, the outer surface 15 c exposed to the external space has a recess 12 d extending along the axial direction of the electric wire 50. The recess 12d extends from the rear part of the core wire crimping part 12A to the connecting crimping part 12C. Recesses 12d are those formed in accordance with the step between the first curved surface 117A ₁ of the second die 113 and the second curved surface 117A _2. In response to the first curved surface 117A ₁ is raised relative to the second curved surface 117A _2, recess 12d recessed relative to the surrounding portion is formed.

  As shown in FIG. 19, the boundary between the core crimping portion 12A and the connection crimping portion 12C in the first barrel piece 15 is behind the boundary between the core crimping portion 12A and the coupling crimping portion 12C in the second barrel piece 16. Located on the side. In other words, in the core wire crimping part 12A, the skirt part 12e on the first barrel piece part 15 side is directed toward the coated crimping part 12B side along the axial direction of the electric wire 50 from the skirt part 12f on the second barrel piece part 16 side. It is extended. Correspondingly, the connecting and crimping portion 12C of the first barrel piece 15 is positioned on the rear side as a whole compared to the connecting and crimping portion 12C of the second barrel piece 16. The shape of the connection crimping portion 12 </ b> C corresponds to the shape of the intermediate curved surface 117 </ b> C of the second mold 113.

In the second mold 113 causes a recess 12d, the first curved surface 117A ₁ for guiding the first barrel piece 15, raised than the second curved surface 117A ₂ for guiding the second barrel piece 16 ing. The terminal-attached electric wire 2 manufactured by the second mold 113 having a shape that forms the concave portion 12d is smoothly wound during crimping, and has stable electrical performance and the like.

  As explained above, the manufacturing method of the electric wire with a terminal of this embodiment includes a crimping process. In the crimping step, the barrel pieces 15 and 16 of the wire connecting portion 12 of the crimp terminal 1 so as to integrally cover the core wire 51 and the covering 52 with respect to the electric wire 50 whose tip end portion of the core wire 51 is exposed from the covering 52. Is wound around the electric wire 50 and crimped.

  In the crimping step, the first mold 112 supports the electric wire connection portion 12 and the electric wire 50, and the second mold 113 that moves relative to the first mold 112 connects the first barrel piece 15 to the core wire 51 and the covering 52. And the second barrel piece 16 is wound around the outside of the first barrel piece 15. The second mold 113 has a concave curved surface 117 that faces the first mold 112 and guides the first barrel piece 15 and the second barrel piece 16. The curved surface 117 has a core-side curved surface 117A corresponding to the core wire 51, a coating-side curved surface 117B corresponding to the coating 52, and an intermediate curved surface 117C that connects the core-wire-side curved surface 117A and the coating-side curved surface 117B.

In the core-side curved surface 117A, the skirt (first skirt 117D) on the side guiding the first barrel piece 15 is more than the hem (second skirt 117E) on the side guiding the second barrel piece 16. It extends toward the covering side curved surface 117 </ b> B along the axial direction of the electric wire 50. By skirt 117D is extended toward the rearward of the skirt portion 117E, the first curved surface 117A ₁ is raised relative to the second curved surface 117A _2.

The first barrel piece 15 and the second barrel piece 16 are executed by the crimping process performed by the second mold 113 in which the first curved surface 117A ₁ is raised with respect to the second curved surface 117A ₂ . Collision with is suppressed. Therefore, the method of manufacturing the terminal-attached electric wire according to the present embodiment can improve the winding property of the barrel pieces 15 and 16 around the electric wire 50.

Further, in the present embodiment, the first curved surface 117A ₁ is raised relative to the second curved surface 117A ₂ at the end of the intermediate curved surface 117C side of the core-side curved surface 117A. Therefore, the collision of the barrel pieces 15 and 16 at the boundary portion between the core crimp portion 12A and the connecting crimp portion 12C in the crimp terminal 1 is effectively suppressed.

In the present embodiment, the first curved surface also in intermediate curved surface 117C 117A ₁ is raised relative to the second curved surface 117A _2. Therefore, the collision of the barrel pieces 15 and 16 is more reliably suppressed.

  The electric wire with terminal 2 according to the present embodiment includes an electric wire 50 and a crimp terminal 1. The crimp terminal 1 is wound around the core wire 51 and the covering 52 to integrally cover the core wire 51 and the covering 52, and the second barrel piece is wound around the outside of the first barrel piece 15. 16 is included. The wire connection portion 12 includes a core wire crimping portion 12A that is crimped to the core wire 51, a coating crimping portion 12B that is crimped to the coating 52, and a connecting crimping portion 12C that connects the core wire crimping portion 12A and the coating crimping portion 12B. And having.

  In the core wire crimping portion 12 </ b> A of the first barrel piece 15, the outer surface 15 c exposed to the external space has a recess 12 d that extends along the axial direction of the electric wire 50. In the core wire crimping part 12A, the bottom part 12e on the first barrel piece part 15 side extends toward the coated crimping part 12B side along the axial direction of the electric wire 50 from the bottom part 12f on the second barrel piece part 16 side. ing. The wire connecting portion 12 having such a shape is manufactured by the method for manufacturing a terminal-attached electric wire according to this embodiment, and the winding of the barrel pieces 15 and 16 around the electric wire 50 is improved.

  The terminal crimping apparatus 100 according to the present embodiment includes a first mold 112 and a second mold 113. The first mold 112 is a mold that supports the electric wire connection portion 12 of the crimp terminal 1. The 2nd metal mold | die 113 is the 1st barrel which the electric wire connection part 12 has so that the electric wire connection part 12 and the electric wire 50 may be pinched | interposed between the 1st metal mold | die 112, and the core wire 51 and the coating | cover 52 of the electric wire 50 may be covered integrally. This is a mold in which the piece 15 and the second barrel piece 16 are wound around the electric wire 50 and crimped.

  The second mold 113 has a concave curved surface 117 that faces the first mold 112 and guides the first barrel piece 15 and the second barrel piece 16. The curved surface 117 has a core-side curved surface 117A corresponding to the core wire 51, a coating-side curved surface 117B corresponding to the coating 52, and an intermediate curved surface 117C that connects the core-wire-side curved surface 117A and the coating-side curved surface 117B.

In the core-side curved surface 117A, the skirt portion 117D on the side guiding the first barrel piece 15 has a curved surface on the covering side along the axial direction of the electric wire 50 rather than the skirt portion 117E on the side guiding the second barrel piece 16. It extends toward 117B. By skirt 117D is extended toward the rearward of the skirt portion 117E, the first curved surface 117A ₁ is raised relative to the second curved surface 117A _2. The terminal crimping apparatus 100 according to the present embodiment can improve the winding property of the barrel pieces 15 and 16 around the electric wire 50.

[First Modification of Embodiment]
A first modification of the embodiment will be described. In the above embodiment, the first curved surface 117A ₁ and the second curved surface 117A ₂ are moved by shifting the position of the intermediate curved surface 117C between the first wall surface 115 side and the second wall surface 116 side in the second mold 113. And a step was formed. In the above embodiment, the step is provided in the rear portion of the core-side curved surface 117A. In addition to this, a raised portion extending to the front end of the core-wire-side curved surface 117A is provided in the present modification. FIG. 22 is a front view of a second mold according to a first modification of the embodiment, FIG. 23 is a front view showing a crimping process according to the first modification of the embodiment, and FIG. 24 is a first view of the embodiment. Another front view showing the crimping process according to the modification, FIG. 25 is still another front view showing the crimping process according to the first modification of the embodiment, and FIG. 26 is the crimping according to the first modification of the embodiment. It is another front view which shows a process.

As shown in FIG. 22, the core wire side curved surface 117A of the second mold 113 has a raised portion 117F. The raised portion 117F extends along the first direction L. Ridges 117F includes a first curved surface 117A ₁ of the above embodiment and is contiguous with the second step between the curved surfaces 117A ₂ of and extends up to the front end of the core wire-side curved surface 117A.

The raised portion 117F is arranged closer to the first wall surface 115 than the center in the second direction W of the core-side curved surface 117A. The raised portion 117F is disposed at the end on the first wall surface 115 side of the core-side curved surface 117A. Ridges 117F has a first curved surface 117A ₁ and the inclined surface 117A ₃ of. The first curved surface 117A ₁ is a surface of the first wall surface 115 side of the portion in the raised portion 117F. The first curved surface 117A ₁ may be curved to guide the first barrel piece 15. Inclined surfaces 117A ₃ is a surface of the second wall surface 116 side of the ridge 117F.

In the core-side curved surface 117A, than the raised portion 117F surface of the second wall surface 116 side is a second curved surfaces 117A _2. The second curved surface 117A ₂ guides and curves the second barrel piece 16. Inclined surfaces 117A ₃ is continuous with the second curved surface 117A _2.

  The second mold 113 of this modification can improve the winding of the first barrel piece 15 and the second barrel piece 16 in the same manner as the second mold 113 of the above embodiment. With reference to FIGS. 23 to 26, the crimping process using the second mold 113 according to the first modification will be described.

In the crimping step, as shown in FIG. 23, the electric wire connecting portion 12 and the electric wire 50 are placed on the first mold 112. The terminal crimping apparatus 100 lowers the second mold 113 toward the first mold 112. The first wall surface 115 guides the first barrel piece 15 to the first curved surface 117 </ b> A ₁ while sliding with the first barrel piece 15. The second wall surface 116 leads the second barrel pieces 16 while sliding the second barrel piece 16 to the second curved surface 117A _2. 23 shows the second barrel piece 16 is shown a curved state along a second curved surface 117A ₂ is. The first barrel piece 15 slides on the first wall surface 115.

When the second mold 113 is further lowered, as shown in FIG. 24, first barrel piece 15 begins to bend along a first curved surface 117A ₁ in contact with the first curved surface 117A _1. The second barrel piece 16, while being curved along a second curved surface 117A _2, Yuku is fell dramatically towards the first wall surface 115 side.

  When the second mold 113 is further lowered, the tip 15a of the first barrel piece 15 enters the core 51 side from the second barrel piece 16 as shown in FIG. The shape of the raised portion 117 </ b> F is determined so that the collision between the tip 15 a of the first barrel piece 15 and the tip 16 a of the second barrel piece 16 can be suppressed.

  When the second mold 113 is further lowered, the winding of the first barrel piece 15 and the second barrel piece 16 is completed as shown in FIG. The first barrel piece 15 is wound around the core wire 51 and is crimped to the core wire 51. The second barrel piece 16 is wound around the outer side of the first barrel piece 15 and is crimped to the first barrel piece 15.

The inclined surface 117 </ b> A ₃ of the present modification is provided at a position where it does not contact the tip 16 a of the second barrel piece 16. Inclined surfaces 117A ₃ is formed on the first wall surface 115 side than the position of the crimp upon completion of the tip 16a of the second barrel piece 16. Therefore, the second mold 113 of the present modification can further improve the winding of the second barrel piece 16.

  The contents disclosed in the above embodiments and modifications can be executed in appropriate combination.

DESCRIPTION OF SYMBOLS 1 Crimp terminal 2 Electric wire with a terminal 10 Terminal metal fitting 11 Terminal connection part 12 Electric wire connection part 12A Core wire crimp part 12B Cover crimp part 12C Connection crimp part 12d Recess 12e, 12f Bottom part 13 Connection part 14 Bottom part 15 First barrel piece part (1st One conductor crimping piece)
15a tip 15b bent portion 15c outer surface 16 second barrel piece (second conductor caulking piece)
17 Serration area 20 Water stop member 50 Electric wire 51 Core wire 52 Coating 100 Terminal crimping device 112 First mold 112A First anvil 112B Second anvil 112A ₁ , 112B ₁ Concave surface 113 Second mold 113A First crimper 113B Second crimper 113A ₁ , 113B ₁ concave portion 115 first wall surface 115U upper end portion 116 second wall surface 116U upper end portion 117 curved surface 117A core side curved surface 117A ₁ first curved surface 117A ₂ second curved surface 117A ₃ inclined surface 117A ₄ virtual Line 117A ₅ Lower end portion 117A ₆ Adjustment portion 117B Covered curved surface 117C Intermediate curved surface 117D First skirt portion 117E Second skirt portion L First direction W Second direction H Third direction C1 Center line

Claims (5)

The first conductor crimping piece and the second conductor crimping piece which the wire connecting portion of the crimp terminal has so as to integrally cover the core wire and the coating with respect to the electric wire whose tip end portion is exposed from the coating. Including a crimping step of winding the wire around the electric wire and crimping the wire,
In the crimping step, the first mold supports the wire connecting portion and the electric wire, and the second mold that moves relative to the first mold includes the first conductor crimping piece and the core wire. Winding around the coating, and winding the second conductor crimping piece around the first conductor crimping piece,
The second mold has a concave curved surface that is a surface facing the first mold and guides the first conductor crimping piece and the second conductor crimping piece;
The curved surface has a core-side curved surface corresponding to the core wire, a coating-side curved surface corresponding to the coating, and an intermediate curved surface connecting the core-wire-side curved surface and the coating-side curved surface,
In the curved surface of the core wire side, the skirt on the side guiding the first conductor crimping piece is more along the axial direction of the electric wire than the skirt on the side guiding the second conductor crimping piece. The first curved surface that guides and curves the first conductor crimping piece by extending toward the covering-side curved surface guides and curves the second conductor crimping piece. A method for producing a terminal-attached electric wire, characterized by being raised with respect to a second curved surface. The manufacturing method of the electric wire with a terminal according to claim 1, wherein the first curved surface is raised with respect to the second curved surface at an end portion on the intermediate curved surface side of the core wire-side curved surface. The manufacturing method of the electric wire with a terminal according to claim 1 or 2 in which said 1st curved surface has projected to said 2nd curved surface also in said intermediate curved surface. An electric wire in which the tip of the core wire is exposed from the coating;
A first conductor crimping piece wound around the core wire and the coating so as to integrally cover the core wire and the coating; and a second conductor crimping piece wound around the first conductor crimping piece And a crimp terminal including an electric wire connecting portion,
With
The wire connection portion includes: a core wire crimp portion crimped to the core wire; a cover crimp portion crimped to the sheath; and a connection crimp portion connecting the core wire crimp portion and the cover crimp portion. Have
In the core wire crimping portion of the first conductor crimping piece, the outer surface exposed to the external space has a recess extending along the axial direction of the electric wire,
In the core wire crimping portion, the skirt portion on the first conductor crimping piece side extends toward the covering crimping portion side along the axial direction of the electric wire from the skirt portion on the second conductor crimping piece side. An electric wire with a terminal, characterized by A first mold for supporting the wire connection portion of the crimp terminal;
The first conductor crimping piece and the second conductor crimping that the electric wire connecting portion has so as to integrally cover the core wire and the covering of the electric wire by sandwiching the electric wire connecting portion and the electric wire with the first mold. A second mold that wraps the clamp around the electric wire and crimps the clamp;
With
The second mold has a concave curved surface that is a surface facing the first mold and guides the first conductor crimping piece and the second conductor crimping piece;
The curved surface has a core-side curved surface corresponding to the core wire, a coating-side curved surface corresponding to the coating, and an intermediate curved surface connecting the core-wire-side curved surface and the coating-side curved surface,
In the curved surface of the core wire side, the skirt on the side guiding the first conductor crimping piece is more along the axial direction of the electric wire than the skirt on the side guiding the second conductor crimping piece. The first curved surface that guides and curves the first conductor crimping piece by extending toward the covering-side curved surface guides and curves the second conductor crimping piece. A terminal crimping device characterized by being raised with respect to the second curved surface.

Images