JP2009301839A - Method of manufacturing terminal-crimping metal mold and electric wire with terminal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal-crimping metal mold capable of removing an oxide film formed around a core wire by a simple structure, and to provide a method of manufacturing an electric wire with terminal fittings. <P>SOLUTION: A pressurizing part 70 of an anvil 50 has a first pressurizing face 71 for first pressurizing a bottom-plate part 36 at a center part made a step higher, and a second pressurizing face 72 as a slanted face gradually getting lower from the first pressurizing face 71 toward a tip-end direction (a slanted downward left direction in Fig.1) of the core wire 21. As a crimper 60 is lowered, the bottom-plate part 36 is deformed by the slanted face as the second pressurizing face 72 of the anvil 50, and the core wire 21 held against the bottom-plate part 36 is also deformed in a compressed direction, so that force is generated for the core wire 21 to flow in a direction of tip-end sides of those 21 with less compression rates. Extension by this force is generated more greatly in the core wire 21 than in the bottom-plate part 36, which generates a relative movement (a difference of the extension) between the core wire 21 and the terminal fittings 30, so that both members rub each other and the oxide film formed around the core wire 21 is peeled off. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  When attaching the terminal fitting to the covered electric wire, the core wire of the covered electric wire is crimped and connected to the terminal fitting.

  Specifically, for example, the terminal fitting is positioned on the anvil, and the exposed core wire of the covered electric wire is placed on the bottom plate of the terminal fitting. A pair of barrels are raised from both sides of the bottom plate, and when the crimper placed above the anvil is lowered, the tip of the barrel is pushed down by the crimper, and the tip becomes the core wire. I will bite in. Thereby, a core wire and a terminal metal fitting are crimped-connected (refer patent document 1).

Here, although an oxide film is formed around the exposed core wire, it is desirable to remove the oxide film in order to improve conductivity. Therefore, a serration for removing the oxide film is recessed in the barrel portion of Patent Document 1.
Japanese Patent Laid-Open No. 2003-31274

However, in the method of removing the oxide film by serration, the removal performance of the oxide film is not sufficient, and there is room for improvement in conductivity.
The present invention has been completed based on the above circumstances, and a terminal crimping mold capable of improving conductivity by improving the removability of an oxide film formed around a core wire with a simple configuration and It aims at providing the manufacturing method of an electric wire with a terminal metal fitting.

  The present invention is for crimping a copper or copper alloy terminal fitting having a bottom plate portion and a pair of barrel portions raised from the side edges of the bottom plate portion to an aluminum or aluminum alloy core wire of a covered electric wire. A die for crimping the terminal, the lower die receiving the bottom plate portion of the terminal fitting, and the barrel between the lower die in a state where the tip of the core wire is addressed to the bottom plate portion of the terminal fitting A terminal crimping mold comprising: an upper mold that deforms the barrel section and the core wire so that the barrel section wraps the core wire while compressing the core section by crushing a section; and the bottom plate of the lower mold The shape of the portion that receives the portion is formed such that the gap between the upper die and the portion that is located on the tip side of the core wire is widened (means 1).

  Moreover, in the means 1 of the said structure, the inclined surface which descends | falls to the front downward side is formed in the part which receives the said baseplate part of the said terminal metal fitting among the said lower mold | types, It is characterized by the above-mentioned. (Means 2).

  Further, in the means 2 configured as described above, the inclined surface is formed as a groove-shaped inclined recess extending along the axial direction of the core wire, and the bottom surface of the inclined recess is closer to the both side portions of the lower mold. The width dimension perpendicular to the axial direction of the core wire of the inclined recess may be set so as to become narrower toward the tip end side of the core wire.

  Moreover, the thing of the means 1 WHEREIN: The part which receives the said baseplate part of the said terminal metal part among the said lower mold | types may be made to form the level | step difference surface which descends | falls in steps toward the front end side of the said core wire. .

  In the method for manufacturing an electric wire with terminal fitting of the present invention, a terminal fitting having a bottom plate portion and a pair of barrel portions raised from the side edges of the bottom plate portion is crimped to the core wire of the covered electric wire by a terminal crimping die. A method of manufacturing an electric wire with a terminal metal fitting, wherein the terminal crimping die has a lower mold for receiving a bottom plate portion of the terminal metal fitting, and a tip of the core wire is directed to the bottom plate portion of the terminal metal fitting. An upper die that deforms the barrel portion and the core wire so that the barrel portion wraps the core wire while compressing the barrel portion by crushing the barrel portion with the lower die in a state, and the lower die Among these, the shape of the portion that receives the bottom plate portion is characterized in that a portion that is formed in such a shape that the gap between the lower mold and the portion located on the distal end side of the core wire is widened is used.

  Since the shape of the part that receives the bottom plate part of the lower mold is formed so that the gap between the upper mold and the part located on the tip side of the core wire is widened, the bottom plate part is sandwiched between the upper mold and the lower mold Of these, the rear end side receives a greater force due to clamping. When the bottom plate portion is deformed by receiving this force, the core wire addressed to the bottom plate portion is also deformed in the compressing direction, and the compression rate of the core wire is increased. Then, the core wire generates a force that flows in the direction of escaping to the tip side of the core wire having a low compression rate.

  Since the elongation due to this force is greater in the core wire than in the bottom plate portion, a relative movement (difference in elongation) occurs between the core wire and the terminal fitting, and rubbing occurs between both members. This rubbing peels off the oxide film formed around the core wire. Therefore, the removability of the oxide film formed around the core wire can be enhanced and the conductivity can be improved.

<Embodiment 1>
Hereinafter, the manufacturing method of the electric wire 10 with a terminal metal fitting of Embodiment 1 which actualized this invention is demonstrated with reference to FIGS.
As shown in FIG. 1, the electric wire 10 with terminal metal fittings of the present embodiment is formed by connecting a terminal metal fitting 30 to a terminal portion of a covered electric wire 20, for example, a battery and an inverter constituting a power source for traveling in an electric vehicle. The device is routed between devices (not shown) such as a motor.

  The covered electric wire 20 is obtained by coating a core wire 21 formed by spirally twisting a plurality of thin aluminum wires 21A (metal strands) with a resin insulating coating 22 (insulating layer). The insulation coating 22 is peeled off and the core wire 21 is exposed.

The terminal fitting 30 is a so-called open barrel type, and includes a box-shaped terminal portion 31 and a wire connecting portion 32 that is continuous with the terminal portion 31 and to which the covered wire 20 is connected, and has higher strength than aluminum. Made of copper alloy.
The terminal portion 31 is a box-shaped female terminal fitting 30 and is electrically connected to the outside by inserting a male terminal (not shown) into the insertion hole 31A.

The electric wire connection portion 32 includes an electric wire holding portion 33 that holds the covered electric wire 20 and a core wire connection portion 35 that is connected to the core wire 21.
The electric wire holding part 33 has a pair of caulking pieces 33A and 33A raised from the left and right side edges of the bottom plate continuous from the core wire connecting part 35, and curves the pair of caulking pieces 33A and 33A toward the coated electric wire 20 side. Thus, the covered electric wire 20 is held so as not to be detached or displaced.

The core wire connecting portion 35 includes a bottom plate portion 36 having a semi-cylindrical shape (a bowl shape), and a pair of barrel portions 37 extending from both side portions of the bottom plate portion 36.
The barrel portion 37 is raised from both side portions of the bottom plate portion 36 and is crimped by compressing the core wire 21 so as to wrap the core wire 21 from the outside while biting the tip portion into the core wire 21 from above the core wire 21. . Thereby, the core wire 21 crimped to the barrel portion 37 is compressed inside the barrel portion 37.

  A biting recess 40 is formed in the lower portion of the bottom plate portion 36 and is recessed by relative movement of an anvil 50 (corresponding to the “lower mold” of the present invention) and a crimper 60 (corresponding to the “upper mold” of the present invention) described later. Has been. The biting recess 40 has a shape corresponding to a pressing portion 70 of the anvil 50 described later.

  As shown in FIG. 2, the anvil 50 is a metal mold used when the terminal fitting 30 is crimped. The anvil 50 has a substantially rectangular parallelepiped shape, and has an upper end portion (tip portion) at the bottom plate portion 36 from the lower surface. A pressurizing portion 70 (a portion that receives the bottom plate portion 36 in the lower mold) is formed to pressurize and bite.

  The pressurizing unit 70 is long in the axial direction of the core wire 21, and the height varies depending on the position in the axial direction. Specifically, the central portion in the axial direction is a first pressurizing surface 71 that is one step higher, and the first pressurizing surface 71 first bites into the bottom plate portion 36. Next, the tip side of the core wire 21 (in the diagonally lower left direction in FIG. 2) from the first pressure surface 71 is an inclined surface that gradually decreases (an inclined surface that slopes downward and downward toward the tip side of the core wire 21). The second pressurizing surface 72 having a shape in which the gap between the upper die and the upper die is widened, and the first pressurizing surface 71 bites into the bottom plate portion 36, and then the second pressurizing surface. It gradually bites into the bottom plate portion 36 from the high portion of 72. The rear end side of the core wire 21 from the first pressure surface 71 (in the diagonally upper right direction in FIG. 2) is a third pressure surface 73 that is lowered stepwise. The height is substantially the same as the lower end of the second pressure surface 72. Therefore, all of the second pressure surface 72 bites into the bottom plate portion 36, and at the same time, the third pressure surface 73 bites into the bottom plate portion 36.

  The first pressure surface 71, the second pressure surface 72, and the third pressure surface 73 have a substantially square shape with substantially the same area, and the first pressure surface 71 and the second pressure surface 72 are semicircular bottom plate portions 36. In order to make it easy to receive, it has the shape curved so that the substantially center part of the width direction may become low gradually. On the other hand, the third pressure surface 73 has a flat shape. Thus, in this embodiment, an anvil bites into the baseplate part 36 of a terminal metal fitting, and forms the recessed part 40 other than the objective of mounting and positioning a terminal metal fitting in the case of crimping | compression-bonding.

  As shown in FIG. 3, the crimper 60 is disposed above the anvil 50 on which the terminal fitting 30 is placed, and the barrel portion 37 of the terminal fitting 30 envelops the core wire 21 by lowering the crimper 60. The core wire 21 is crimped by being crushed. The inner shape of the crimper 60 is recessed in a mountain shape so as to be deformed so as to wrap up the pair of raised barrel portions 37, and the top portion thereof becomes a semicircular shape according to the pair of barrel portions 37. ing.

  As will be described in detail later, when the core wire 21 is substantially caulked to the barrel portion 37, the presser 70 of the anvil 50 bites into the bottom plate portion 36 of the terminal fitting 30 from below by the further lowering of the crimper 60. ing.

Next, the manufacturing method of the electric wire 10 with a terminal metal fitting is demonstrated.
After punching the metal plate material, bending is performed so that the pair of barrel portions 37 are raised (see FIG. 3), and the core wire 21 is connected to the bottom plate of the terminal fitting 30 as shown in FIG. In the state accommodated in the inner surface 36 </ b> A of the portion 36, the center portion of the bottom plate portion 36 (position near the intermediate portion in the axial direction of the barrel portion 37) is placed on the first pressure surface 71 of the anvil 50.

  When the crimper 60 is lowered from this state, the pair of raised barrel portions 37 are deformed inward along the inner surface shape of the crimper 60, and the barrel portion 37 is moved to U by further lowering of the crimper 60. The tip portion 37 </ b> A of the barrel portion 37 is abutted against the core wire 21. And the tip part 37A of the barrel part 37 bites into the inside of the core wire 21 as it is, and the barrel part 37 is crushed and the crimp connection of the core wire 21 and the terminal metal fitting 30 is performed.

  When the crimper 60 is further lowered from this state, first, the first pressure surface 71 of the anvil 50 bites into the bottom plate portion 36 of the terminal fitting 30. At this time, the oxide film formed around the core wire 21 by the rubbing of the edge portion of the rear end portion of the first pressure surface 71 is removed.

  As the crimper 60 is further lowered, the second pressure surface 72 that is an inclined surface gradually bites into the bottom plate portion 36. At this time, as shown in FIG. 7, before the second pressure surface 72 bites in, the inner core wire 21 is substantially uniform (the upper diagram in FIG. 7), whereas the second pressure surface 72 bites in. Therefore, the compression rate of the core wire 21 increases toward the rear side of the bite (the lower diagram in FIG. 7; x1 <x2). For this reason, the core wire 21 generates a force that tends to flow (stretches) toward the distal end side of the core wire 21 with a low compressibility, while such a force (force that tends to stretch) is compared for the bottom plate portion 36. Therefore, a difference in elongation, that is, rubbing occurs at the boundary portion between the core wire 21 and the bottom plate portion 36 (indicated by an arrow at the boundary portion between the core wire and the bottom plate portion in FIG. 7). Since this rubbing removes the oxide film formed around the core wire 21, the electrical conductivity between the core wire 21 and the terminal fitting 30 can be improved.

When the crimper 60 is further lowered (lowered until the lower end 60A of the crimper in FIG. 5 reaches a predetermined position below the terminal fitting 30), as shown in FIG. While biting into the bottom plate portion 36, the entire flat third pressure surface 73 bites into the bottom plate portion 36. At this time, the oxide film formed around the core wire 21 due to the rubbing of the edge of the rear end portion of the third pressure surface 73 is removed.
Then, when the crimper 60 is returned to the original position, as shown in FIG. 6, the electric wire 10 with terminal fittings of this embodiment is manufactured. Note that the portion of the biting recess 40 that is recessed by the first pressure surface 71 and the second pressure surface 72 has a shape in which the first pressure surface 71 and the second pressure surface 72 are curved. The intermediate portion in the width direction has a shape having a bulging portion 40A that slightly swells.

In this way, the shape of the portion of the anvil 50 (lower mold) that receives the bottom plate portion 36 is inclined downward toward the front end side of the core wire 21 (the crimper 60 (upper mold) is closer to the tip side of the core wire 21). The second pressurizing surface 72 is an inclined surface that has a shape in which the gap between the second pressurizing surface 72 and the upper surface is inclined. Therefore, when the crimper 60 and the anvil 50 are sandwiched, a relative movement (difference in elongation) occurs between the core wire 21 and the terminal fitting 30, and rubbing occurs between both members. By this rubbing, the oxide film formed around the core wire 21 is peeled off, and the conductivity between the core wire 21 and the terminal fitting 30 can be improved.
Further, by forming the second pressure surface 72 as an inclined surface, the core wire 21 can be extended not only at the edge portion but also throughout the inclined portion of the biting recess 40 formed in an inclined shape. As a result, the entire inclined portion is rubbed, so that the oxide film between the core wire 21 and the terminal fitting 30 can be further removed.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS.
In the second embodiment, as shown in FIG. 9, the second pressurizing surface 172 of the anvil 150 is recessed and narrows toward the distal end side of the core wire 21, and the biting recess 140 of the electric wire 110 with terminal fitting is also an anvil 150. (See FIG. 8). Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 9, an inclined recess 80 extending in a groove shape along the axial direction of the core wire 21 is formed on the second pressure surface 172 of the pressure unit 170. The bottom surface of the inclined recess 80 has a cross-sectional arc shape that increases toward both sides 81 and 81 of the anvil 150 (second pressure surface 172). The width dimension of the inclined recess 80 perpendicular to the axial direction of the core wire 21 is as described above. It is set so that the tip end side of the core wire 21 becomes narrower. That is, the inclined recess 80 has a tapered shape that becomes thinner toward the tip.

  Thereby, since the elongation of the core wire 21 generated on the distal end side of the core wire 21 shown in the first embodiment is further narrowed by the both side portions 81, 81 of the inclined recess 80, the core wire 21 and the bottom plate portion 36 generated when the core wire 21 is narrowed. The oxide film formed around the core wire 21 is peeled off by the friction between the inner surface 36A and the electric wire 10 with the terminal metal fitting of the first embodiment, and the conductivity between the core wire 21 and the terminal metal fitting 30 is improved. Can do.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS.
In the third embodiment, as shown in FIG. 11, the pressurizing part 270 of the anvil 250 is positioned in a stepped shape (on the distal end side of the core wire 21) that is inclined downward toward the distal end side (downwardly leftward in FIG. 11). It is formed as a stepped surface having a shape in which the gap between the upper mold and the upper die increases. The biting recess 240 of the electric wire 210 with terminal fitting is also shaped according to the shape of the anvil 250 (see FIG. 10).

  Specifically, as shown in FIG. 11, the pressurizing part 270 has a three-stage step shape extending in the axial direction of the core wire 21, and the rear end part of the upper stage first presses the bottom plate part 36. The middle part of the middle stage, which is one pressure surface 271 and is lowered from the first pressure surface 271 by the step 271A, is the second pressure surface 272 that secondly presses the bottom plate portion 36, and only the step 272A from the second pressure surface 272. The lower rear end of the lower stage is a third pressure surface 273 that pressurizes the bottom plate portion 36 last.

  The first pressure surface 271, the second pressure surface 272, and the third pressure surface 273 are square shapes having substantially the same area and are flat surfaces. In addition, you may use what made the lower surface of the baseplate part of the terminal metal fitting 30 the flat shape corresponding to the 1st pressurization surface 271, and like 1st Embodiment, the 1st pressurization surface 271 is used for the width direction. A semi-circular bottom plate portion 36 may be placed thereon so as to have a curved shape so that the substantially central portion thereof is lowered.

Next, the manufacturing method of the electric wire 210 with a terminal metal fitting is demonstrated.
After punching the metal plate material, bending is performed so that the pair of barrel portions 37 are raised (see FIG. 12), and as shown in FIG. 13, the first pressure surface 271 of the anvil 250 is formed. The position of the rear end side (the rear end side of the barrel part 37) of the bottom plate part 36 of the terminal fitting 30 is placed slightly above the center part.

Then, the crimper 60 is lowered from this state. Then, the pair of raised barrel portions 37 are deformed inward along the inner surface shape of the crimper 60, and the barrel portion 37 is folded back into a U shape by further lowering of the crimper 60. The portion 37A is abutted against the core wire 21. In this state, the tip portion 37A of the barrel portion 37 bites into the core wire 21, and the crimp connection between the core wire 21 and the terminal fitting 30 is performed. If the crimper 60 is further lowered from here, first, the first pressure surface 271 of the anvil 250 bites into the bottom plate portion 36 of the terminal fitting 30.
At this time, as shown in FIG. 16, before the anvil 250 bites in, the inner core wire 21 is substantially uniform (upper view in FIG. 16), whereas the first pressure surface 271 bites into the bottom plate portion 36. As a result, the bottom plate portion 36 is plastically deformed so as to be pushed upward, and the core wire 21 is plastically deformed by this plastic deformation to increase the compression rate (lower diagram in FIG. 16).

  Here, since the portion in front of the first pressure surface 271 (the portion compressed by the second pressure surface 272) is less compressed than the portion of the first pressure surface 71 (y1 <y2), the first pressure surface 271. The core wire 21 thus compressed generates a force that escapes (extends) toward the distal end side of the core wire 21 with a low compression rate, and rubbing occurs between the core wire 21 and the bottom plate portion 36 in the step portion 36B (the core wire in the lower diagram of FIG. (Indicated by the arrow at the boundary of the bottom plate). Since this rubbing removes the oxide film formed around the core wire 21, the electrical conductivity between the core wire 21 and the terminal fitting 30 can be improved.

  When the crimper 60 is further lowered, first, the second pressure surface 272 of the anvil 250 bites into the bottom plate portion 36 of the terminal fitting 30. At this time as well, the portion corresponding to the step 272A on the tip side of the second pressure surface 272 is rubbed, and the oxide film formed around the core wire 21 is removed as described above. Further, the escape of the core wire 21 that occurs here occurs only in the front where the compression rate is low, and does not occur in the rear where the compression rate is high. It can be prevented from occurring in the fixed rear.

When the crimper 60 is further lowered, the entire third pressure surface 273 bites into the bottom plate portion 36 as shown in FIG. At this time as well, the step on the tip side of the third pressure surface 273 is rubbed, and the oxide film formed around the core wire 21 is removed as described above. Similarly to the above, the escape of the core wire 21 occurs only in the front where the compression rate is low, and does not occur in the rear where the compression rate is high. It can be prevented from occurring.
Then, when the crimper 60 is returned to the original position, as shown in FIG. 15, the electric wire 210 with terminal fittings of this embodiment is manufactured.

  In this manner, a step surface that slopes downward in a stepped manner toward the tip end side of the core wire 21 is formed in the portion of the anvil 250 (lower mold) that receives the bottom plate portion 36 of the terminal fitting 30, and is thus generated by the step portion. The oxide film formed around the core wire 21 is peeled off by rubbing between the bottom plate portion 36 and the core wire 21, and the conductivity between the core wire 21 and the terminal fitting 30 can be improved.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 18, in the fourth embodiment, a flat portion on the rear end side of the core wire 21 in the pressure portion 370 of the anvil 350 is a first pressure surface 371 that first pressurizes the bottom plate portion 36. An inclined surface (an inclined surface that inclines downward toward the front end side of the core wire 21) that gradually decreases from the first pressurizing surface 371 toward the distal end direction of the core wire 21 (downwardly inclined to the left in FIG. 18) is defined as the second pressurizing surface 372. ing. The biting recess 340 of the electric wire 310 with terminal fitting also has a shape corresponding to the shape of the anvil 350 (FIG. 10).
In addition, you may use what made the lower surface of the baseplate part of the terminal metal fitting 30 the flat shape corresponding to the 1st pressurization surface 371, and the 1st pressurization surface 371 is width direction like Embodiment 1. FIG. A semi-circular bottom plate portion 36 may be placed thereon so as to have a curved shape so that the substantially central portion thereof is lowered.

Next, the manufacturing method of the electric wire 310 with a terminal metal fitting is demonstrated.
After punching the metal plate material, bending is performed so that the pair of barrel portions 37 are raised (see FIG. 19), and as shown in FIG. 20, the first pressure surface 71 of the anvil 350 is formed. A portion on the rear end side slightly from the center portion of the bottom plate portion 36 of the terminal fitting 30 is placed on the top.

  Then, the crimper 60 is lowered from this state. Then, the pair of raised barrel portions 37 are deformed inward along the inner surface shape of the crimper 60, and the barrel portion 37 is folded back into a U shape by further lowering of the crimper 60. The portion 37A is abutted against the core wire 21. In this state, the tip portion 37A of the barrel portion 37 bites into the core wire 21, and the crimp connection between the core wire 21 and the terminal fitting 30 is performed. If the crimper 60 is further lowered from here, the first pressure surface 71 of the anvil 350 first bites into the bottom plate portion 36 of the terminal fitting 30. At this time, the oxide film formed around the core wire 21 due to the rubbing of the edge of the rear end portion of the first pressure surface 71 is removed.

  Next, when the crimper 60 is further lowered, the inclined surface which is the second pressure surface 372 of the anvil 350 gradually bites into the bottom plate portion 36. At this time, before the anvil 350 bites in, the inner core wire 21 is substantially uniform, but as the second pressure surface 372 bites in, the biting portion becomes higher in the compressibility of the core wire 21 ( (See FIG. 7). Therefore, rubbing occurs at the boundary portion between the core wire 21 and the bottom plate portion 36. Since this rubbing removes the oxide film formed around the core wire 21, the electrical conductivity between the core wire 21 and the terminal fitting 30 can be improved.

As the crimper 60 is further lowered, the entire second pressure surface 372 bites into the bottom plate portion 36 as shown in FIG.
And as shown in FIG. 22, if the crimper 60 is returned to the original, the electric wire 310 with a terminal metal fitting of this embodiment will be manufactured.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, the material of the core wire 21 of the covered electric wire 20 is aluminum, but an aluminum alloy may be used. Moreover, although the material of the terminal fitting 30 is a copper alloy, copper may be used.

The perspective view of the electric wire with a terminal metal fitting of Embodiment 1 Perspective view of anvil Diagram showing the positional relationship between anvil and crimper Side view showing the state where the terminal fitting is placed on the anvil before crimping Side view of bottom plate deformed by crimping and anvil Side view of the electric wire with terminal fittings manufactured according to Embodiment 1 The figure which expands the circled part of Drawing 4 and Drawing 6, and explains signs that a core wire and a baseplate part rub The perspective view of the electric wire with a terminal metal fitting of Embodiment 2 Perspective view of anvil The perspective view of the electric wire with a terminal metal fitting of Embodiment 3 Perspective view of anvil Diagram showing the positional relationship between anvil and crimper Side view showing the state where the terminal fitting is placed on the anvil before crimping Side view of bottom plate deformed by crimping and anvil Side view of the electric wire with terminal fittings manufactured according to Embodiment 3 The figure which expands the encircled part of FIG.13 and FIG.15, and demonstrates a mode that a core wire and a baseplate part are rubbed The perspective view of the electric wire with a terminal metal fitting of Embodiment 4 Perspective view of anvil Diagram showing the positional relationship between anvil and crimper Side view showing the state where the terminal fitting is placed on the anvil before crimping Side view of bottom plate deformed by crimping and anvil Side view of the electric wire with terminal fittings manufactured according to Embodiment 4

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,110,210,310 ... Electric wire with a terminal metal fitting 20 ... Coated electric wire 21 ... Core wire 30 ... Terminal metal fitting 33 ... Electric wire holding part 37 ... Barrel part 40,140,240,340 ... Biting recessed part 50,150,250,350 ... Anvil (bottom)
60 ... crimper (upper)
70,170,270,370 ... Pressure part 71,271,371 ... First pressure surface 72,172,272,372 ... Second pressure surface 73,273 ... Third pressure surface 80 ... Inclined recess

Claims (5)

A terminal crimping gold for crimping a copper or copper alloy terminal fitting having a bottom plate part and a pair of barrel parts raised from the side edges of the bottom plate part to an aluminum or aluminum alloy core wire of the covered electric wire Type,
The barrel part by crushing the barrel part between the lower mold for receiving the bottom plate part of the terminal metal fitting and the lower mold in a state where the tip part of the core wire is applied to the bottom plate part of the terminal metal fitting And a terminal crimping mold comprising an upper mold for deforming the core wire so as to wrap the core wire while compressing the core wire,
A terminal crimping mold characterized in that a part of the lower mold that receives the bottom plate part is formed into a shape in which a gap between the lower mold and the upper mold is widened toward a part positioned on the distal end side of the core wire.   2. The terminal crimping device according to claim 1, wherein a portion of the lower mold that receives the bottom plate portion of the terminal fitting is formed with an inclined surface that is inclined downward toward the front end side of the core wire. Mold.   The inclined surface is formed as a groove-shaped inclined concave portion extending along the axial direction of the core wire, and is formed so as to form a cross-sectional arc shape in which the bottom surface of the inclined concave portion becomes higher toward the both side portions of the lower mold. The terminal crimping die according to claim 2, wherein a width dimension of the inclined recess perpendicular to the axial direction of the core wire is set to be narrower toward a tip end side of the core wire.   2. The terminal crimping device according to claim 1, wherein a portion of the lower mold that receives the bottom plate portion of the terminal fitting is formed with a stepped surface that slopes downward in a stepped manner toward the tip end side of the core wire. Mold. A method of manufacturing an electric wire with a terminal fitting, wherein a terminal fitting having a bottom plate portion and a pair of barrel portions raised from side edges of the bottom plate portion is crimped to a core wire of a covered electric wire by a terminal crimping die,
The barrel portion between the lower die that receives the bottom plate portion of the terminal fitting as the terminal crimping die and the lower die in a state where the tip end portion of the core wire is addressed to the bottom plate portion of the terminal fitting. The barrel part and the core wire are deformed so that the barrel part wraps while compressing the core wire by crushing, and the shape of the part that receives the bottom plate part of the lower mold, What is formed in the shape where the gap between the said lower mold | types is widened as the part located in the front end side of the said core wire is used, The manufacturing method of the electric wire with a terminal metal fitting characterized by the above-mentioned.

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