WO2010058786A1 - 端子金具付き電線及び端子金具付き電線の製造方法 - Google Patents
端子金具付き電線及び端子金具付き電線の製造方法 Download PDFInfo
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- WO2010058786A1 WO2010058786A1 PCT/JP2009/069542 JP2009069542W WO2010058786A1 WO 2010058786 A1 WO2010058786 A1 WO 2010058786A1 JP 2009069542 W JP2009069542 W JP 2009069542W WO 2010058786 A1 WO2010058786 A1 WO 2010058786A1
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- wire
- core wire
- electric wire
- terminal fitting
- region
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000002788 crimping Methods 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 238000009413 insulation Methods 0.000 claims description 13
- 238000007788 roughening Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000000635 electron micrograph Methods 0.000 description 12
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
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- 238000002474 experimental method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
- H01R43/05—Crimping apparatus or processes with wire-insulation stripping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/029—Welded connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
- H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
- H01R4/185—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0207—Ultrasonic-, H.F.-, cold- or impact welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
- H01R4/625—Soldered or welded connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49174—Assembling terminal to elongated conductor
Definitions
- the present invention relates to an electric wire with a terminal fitting and a method for manufacturing an electric wire with a terminal fitting.
- patent document 1 the thing of patent document 1 is known as an electric wire with a terminal metal fitting.
- This is formed by crimping a terminal fitting to an electric wire including a core wire composed of a plurality of strands and a core wire exposed from the electric wire.
- a terminal metal fitting has a crimping
- the electric wire and the terminal fitting are electrically connected by being crimped so that the crimping portion is wound around the outer side of the core wire.
- Japanese Patent Laid-Open No. 9-7647 Japanese Patent Laid-Open No. 9-7647
- the core wire and the crimping portion are electrically connected to each other by contacting the outer peripheral surface of the core wire and the inner surface of the crimping portion.
- a film having a relatively large electrical resistance such as an oxide film
- the strands are electrically connected to each other by the coating formed on the surface of the strand.
- it will not be able to connect sufficiently.
- only the strands that are located on the radially outer side of the core wire and contact the inner surface of the crimped portion contribute to the electrical connection between the core wire and the crimped portion, and are located on the radially inner side of the core wire.
- the strands do not contribute to the electrical connection with the crimping portion.
- the electrical resistance between the electric wire and the terminal fitting is increased.
- This invention was completed based on the above situations, Comprising: Provided the manufacturing method of the electric wire with a terminal metal fitting with which the electrical resistance between an electric wire and a terminal metal fitting was reduced, and the electric wire with a terminal metal fitting. Objective.
- the present invention is a method of manufacturing an electric wire with a terminal fitting, comprising: an electric wire having a core wire composed of a plurality of strands; and a terminal fitting having a crimping portion to be crimped to the core wire exposed from the electric wire, Peeling the insulation coating covering the outer peripheral surface of the core wire to expose the core wire, sandwiching the exposed core wire between a pair of jigs, applying ultrasonic vibration to the core wire by the jig, and the core wire A step of crimping the crimping portion so as to be wound from outside on a region including a region to which ultrasonic vibration is applied.
- this invention is an electric wire with a terminal metal fitting provided with the electric wire containing the core wire which consists of a some strand, and the terminal metal fitting crimped
- the core wire exposed from the said electric wire A roughened region is formed on the surface of the wire constituting the wire by applying ultrasonic vibration to the wire, and the terminal fitting has a crimping portion to be crimped so as to be wound around the outside of the core wire.
- the crimping part is crimped to a region of the core wire including the roughened region.
- the strands constituting the core wire rub against each other.
- the surfaces of the strands rub against each other, so that a roughened region in which the surface is roughened is formed on the strands.
- the crimping part When the crimping part is crimped to the core wire composed of the above-described roughened region, the strands are rubbed against each other by applying force by the crimping part. As a result, the roughened regions formed on the surface of the strands rub against each other, so that the coating such as an oxide film formed on the surface of the strands is peeled off. Then, the new surface of the strand is exposed. The exposed new surfaces contact each other, whereby the strands are electrically connected. Thereby, since the strand located in the radial direction inside of a core wire can contribute to the electrical connection between an electric wire and a terminal metal fitting, electric resistance between an electric wire and a terminal metal fitting can be made small. it can.
- the electrical resistance between the electric wire and the terminal fitting can be reduced.
- FIG. 1 is a side view showing an electric wire with terminal fitting according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing a female terminal fitting.
- FIG. 3 is a perspective view showing a state in which the insulation coating of the electric wire has been removed.
- FIG. 4 is a perspective view showing a state in which the core wire is ultrasonically welded.
- FIG. 5 is a perspective view showing a state before the wire barrel is crimped to the core wire.
- 6 is a cross-sectional view taken along line VI-VI in FIG.
- FIG. 7 is an electron micrograph showing the strands in Experimental Example 1.
- FIG. 8 is an electron micrograph showing the surface of the strand in Experimental Example 1.
- FIG. 9 is an electron micrograph showing the strands in Experimental Example 2.
- FIG. 7 is an electron micrograph showing the strands in Experimental Example 1.
- FIG. 10 is an electron micrograph showing the surface of the strand in Experimental Example 2.
- FIG. 11 is an electron micrograph showing the strands in Experimental Example 3.
- FIG. 12 is an electron micrograph showing the surface of the strand in Experimental Example 3.
- FIG. 13 is an electron micrograph showing the strands in Comparative Example 1.
- FIG. 14 is an electron micrograph showing the surface of the strand in Comparative Example 1.
- FIG. 15 is a graph showing the electrical resistance value between the strands.
- FIG. 16 is a perspective view showing a state before the wire barrel is crimped to the core wire, as described in another embodiment.
- FIG. 17 is a plan view showing a terminal fitting having an intermediate splice structure described in another embodiment.
- FIG. 18 is a cross-sectional view illustrating a state in which ultrasonic vibration is applied to a core wire plastically deformed by a jig according to another embodiment.
- FIG. 19 is a cross-sectional view illustrating a state in which ultrasonic vibration is applied to an elliptically deformed core wire according to another embodiment.
- FIG. 20 is a cross-sectional view showing a state in which ultrasonic vibration is applied to a core wire plastically deformed into a circle according to another embodiment.
- FIG. 21 is a perspective view illustrating a state before the core wire is plastically deformed by the roll machine according to another embodiment.
- FIG. 22 is a perspective view illustrating a state after the core wire is plastically deformed by the roll machine according to another embodiment.
- FIG. 23 is a cross-sectional view illustrating a state before ultrasonic vibration is applied to a core wire plastically deformed by a roll machine according to another embodiment.
- FIG. 24 is an enlarged cross-sectional view of a main part showing a step in the middle of crimping the wire barrel in the electric wires with terminal fittings according to Experimental Examples 4 to 6.
- FIG. 25 is an enlarged cross-sectional view of a main part showing a process in the middle of crimping the wire barrel in the electric wires with terminal fittings according to Experimental Examples 7 to 9.
- FIG. 26 is a graph showing contact resistance and fixing force of the electric wires with terminal fittings according to Experimental Examples 4 to 6.
- FIG. 27 is a graph showing contact resistance and fixing force of the electric wires with terminal fittings according to Experimental Examples 7 to 9.
- FIG. 28: is a side view which shows the process of giving an ultrasonic vibration to a core wire about the electric wire with a terminal metal fitting which concerns on Embodiment 2 of this invention.
- FIG. 29 is a side view showing a state after ultrasonic vibration is applied to the core wire.
- FIG. 30 is a side view showing a state where the tip of the core wire is cut.
- the electric wire 10 with a terminal metal fitting includes an electric wire 11 and a female terminal metal fitting 12 (corresponding to a terminal metal fitting described in claims) connected to an end of the electric wire 11. As shown in FIG. 1, the electric wire 11 extends in the left-right direction in FIG. 1 while being connected to the female terminal fitting 12.
- the electric wire 11 is formed by surrounding the outer periphery of a core wire 13 with an insulating coating 14.
- the core wire 13 may be made of any metal such as aluminum, aluminum alloy, copper, copper alloy, or the like as necessary. In the present embodiment, aluminum or aluminum alloy is used.
- the core wire 13 is formed of a stranded wire obtained by twisting a large number of strands 15. The core wire 13 is exposed from the end of the electric wire 11 by peeling off the insulating coating 14 by a predetermined length.
- the plurality of strands 15 constituting the core wire 13 exposed from the electric wire 11 are sandwiched between a pair of jigs 16 and 16 and are given ultrasonic vibrations. Are joined together.
- the strand 15 is formed with a roughened region 17 whose surface is roughened by applying ultrasonic vibration from the jig 16 and rubbing each other.
- the roughened region 17 is formed on the surface of each strand 15 located in the region where the strands 15 are joined together.
- the female terminal fitting 12 is formed by pressing a metal plate material (not shown) into a predetermined shape.
- the female terminal fitting 12 is formed with a pair of insulation barrels 18 that are crimped so as to be wound around the insulating coating 14 of the electric wire 11 from the outside.
- a wire barrel 19 which is connected to the insulation barrel 18 so as to be wound around the core wire 13 of the electric wire 11 from the outside is provided at a position to the left of the insulation barrel 18 in FIG. Is equivalent).
- a connecting portion 20 is formed at the left side of the wire barrel 19 so as to be connected to and electrically connected to a mating terminal fitting (not shown).
- the mating terminal fitting is a male terminal fitting.
- the connecting portion 20 has a cylindrical shape, and a male terminal fitting can be inserted into the cylinder.
- An elastic contact piece 21 is formed in the connecting portion 20, and the male terminal fitting and the female terminal fitting 12 are electrically connected by elastically contacting the elastic contact piece 21 and the male terminal fitting. .
- a recess 23 is formed on the contact surface 22 of the wire barrel 19 of the female terminal fitting 12 that contacts the core wire 13.
- three recesses 23 are formed side by side in the direction in which the electric wire 11 extends (the direction indicated by the arrow A in FIG. 2).
- a wire barrel 19 is crimped around the outer periphery of the core wire 13 exposed from the electric wire 11 so as to be wound.
- the core wire 13 is formed with a pressure-bonded region 24 to which the wire barrel 19 is pressure-bonded.
- the roughened region 17 is formed in a slightly larger region in the left-right direction in FIG.
- the connecting portion 20 is formed by bending a metal plate formed in a predetermined shape. At this time, the recess 23 may be formed.
- the core wire 13 is exposed by peeling off the insulation coating 14 at the end of the electric wire 11 (see FIG. 3). As shown in FIG. 4, the exposed core wire 13 is sandwiched between a pair of jigs 16 and 16. In the present embodiment, the pair of jigs 16 and 16 sandwich the core wire 13 from the vertical direction in FIG. After sandwiching the core wire 13 with the jig 16, ultrasonic vibration is applied to the core wire 13 with the jig 16. Known conditions can be used as the conditions for ultrasonic vibration.
- the core wire 13 By applying ultrasonic vibration to the core wire 13, the plurality of strands 15 constituting the core wire 13 rub against each other. Then, a roughened region 17 having a roughened surface is formed on the surface of the strand 15. Further, when ultrasonic vibration is applied to the core wire 13, the surfaces of the strands 15 are melted by frictional heat. Thereafter, the ultrasonic vibration is stopped, the pair of jigs 16 and 16 are separated from each other, the core wire 13 is removed from the jig 16 and cooled (cooled), whereby the strands 15 are welded. As shown in FIG. 4, the core wire 13 is formed in a flat shape in a direction (vertical direction in FIG. 4) in which the pair of jigs 16, 16 sandwich the core wire 13.
- the portion of the core wire 13 including the roughened region 17 is placed on the wire barrel 19, and the insulating coating 14 is attached to the insulation barrel 18.
- Both barrels are crimped to the electric wire 11 from the outside by being sandwiched from above and below by a pair of molds (not shown) in a state of being placed on the wire.
- the orientation in other words, the vertical direction in FIG. 5 between which the core wire 13 is sandwiched between the pair of jigs 16 and 16 and the direction in which the wire barrel 19 is sandwiched between the molds (in other words, a flat shape is formed).
- the wire 11 is arranged with respect to the female terminal fitting 12 in such a manner that the flat surface of the core wire 13 is oriented in the vertical direction).
- the electric wire 10 with a terminal metal fitting is completed by performing said process.
- the strands 15 are rubbed against each other by applying force by the wire barrel 19. Then, the roughened regions 17 formed on the surface of the strand 15 are rubbed with each other, so that the coating such as an oxide film formed on the surface of the strand 15 is peeled off. Then, the new surface of the strand 15 is exposed. The exposed new surfaces contact each other, whereby the wires 15 are electrically connected. Thereby, since the strand 15 located in the radial direction inner side of the core wire 13 can contribute to the electrical connection between the electric wire 11 and the female terminal fitting 12, it is between the electric wire 11 and the female terminal fitting 12. The electrical resistance can be reduced.
- the newly formed surfaces that are in contact with each other adhere to each other, so that a new insulating film such as an oxide film is prevented from being newly formed on the newly formed surface of the strand 15. Thereby, the electrical resistance between the electric wire 11 and the female terminal fitting 12 can be maintained in a small state.
- the strands 15 are electrically connected to each other by welding.
- the strand 15 located on the radially inner side of the core wire 13 can reliably contribute to the electrical connection between the electric wire 11 and the female terminal fitting 12.
- the electrical resistance between the electric wire 11 and the female terminal fitting 12 can be further reduced.
- the roughened region 17 is formed in a region slightly wider than the crimped region 24 in the core wire 13.
- the core wire 13 is made of an aluminum alloy.
- an insulating film such as an oxide film is relatively easily formed on the surface of the core wire 13. This embodiment is effective when an insulating film is easily formed on the surface of the core wire 13.
- the metal plate was formed into a predetermined shape by pressing. Then, the connection part 20 was formed by bending the metal plate material formed in the predetermined shape.
- the insulation coating 14 is peeled off at the end of the electric wire 11 to expose the core wire 13, and then the core wire 13 is sandwiched between a pair of jigs 16, 16 to give ultrasonic vibration to the core wire 13. 15 were welded together.
- the contact pressure of the jig 16 was 13 bar, the frequency was 20 kHz, and the applied energy was 80 Ws.
- FIG. 7 and 8 show electron micrographs of the surface of the strand 15 subjected to ultrasonic vibration.
- the magnification in FIG. 7 is 30 times, and the magnification in FIG. 8 is 4000 times.
- FIG. 9 and 10 show electron micrographs of the surface of the strand 15 subjected to ultrasonic vibration.
- the magnification in FIG. 9 is 30 times, and the magnification in FIG. 10 is 4000 times.
- FIG. 11 and 12 show electron micrographs of the surface of the strand 15 subjected to ultrasonic vibration.
- the magnification of FIG. 11 is 30 times, and the magnification of FIG. 12 is 4000 times.
- ⁇ Comparative Example 1> The metal plate was formed into a predetermined shape by pressing. Then, the connection part 20 was formed by bending the metal plate material formed in the predetermined shape. Then, after peeling off the insulation coating 14 of the electric wire 11 and exposing the core wire 13, the wire barrel 19 was crimped to the exposed core wire 13 to produce the electric wire 10 with terminal fittings.
- FIG. 13 and FIG. 14 show electron micrographs of the surface of the strand 15 subjected to ultrasonic vibration.
- the magnification in FIG. 13 is 30 times, and the magnification in FIG. 14 is 4000 times.
- a roughened region 17 is formed on the surface of the strand 15 according to Experimental Examples 1 to 3 in which ultrasonic vibration is applied to the core wire 13.
- Experimental Example 1 in which the ultrasonic vibration was applied under a relatively severe condition where the contact pressure of the jig 16 was 13 bar and the applied energy was 80 Ws, as shown in FIG.
- Concavities and convexities are formed on the lines 15, and each strand 15 has a distorted shape.
- FIG. 8 when the surface of the strand 15 is magnified and observed, the surface is not smooth but is in a rough state (a state in which fine irregularities are formed), and the roughened region 17 Is formed.
- each strand 15 does not appear to have a distorted shape.
- the surface of the strand 15 is enlarged and observed, the surface is not smooth but rough, and a roughened region 17 is formed.
- FIG. 15 shows the electrical resistance between the strands 15 measured in Experimental Examples 1 to 3 and Comparative Example 1.
- Experimental Example 1 to Experimental Example 3 in which ultrasonic vibration was applied to the core wire 13, the electrical resistance between the strands 15 was smaller than 10 m ⁇ , indicating a sufficiently small electrical resistance value.
- Comparative Example 1 in which ultrasonic vibration was not applied to the core wire 13, the electrical resistance between the strands 15 showed a large value of 60 m ⁇ .
- the strands 15 are rubbed against each other due to the force applied by the wire barrel 19. Then, the roughened regions 17 formed on the surface of the strand 15 are rubbed with each other, so that the coating such as an oxide film formed on the surface of the strand 15 is peeled off. Then, the new surface of the strand 15 is exposed. The exposed new surfaces contact each other, whereby the wires 15 are electrically connected. Thereby, since the strand 15 located in the radial direction inner side of the core wire 13 can contribute to the electrical connection between the electric wire 11 and the terminal fitting, the electrical resistance between the electric wire 11 and the terminal fitting. Can be reduced.
- FIG. 24 shows a step in the middle of crimping the wire barrel 19 to the core wire 13.
- the wire barrel 19 was placed on the upper surface of the mold 50 located on the lower side in FIG.
- the core wire 13 was placed on the upper surface of the wire barrel 19.
- the core wire 13 is sandwiched between a pair of jigs 16 and 16 and subjected to ultrasonic vibration, whereby the strands 15 constituting the core wire 13 are welded to each other.
- the cross-sectional shape of the core wire 13 is a flat rectangular shape.
- a flat surface of the core wire 13 is a surface sandwiched between the jigs 16.
- the core wire 13 was placed on the upper surface of the wire barrel 19 with the flat surface of the core wire 13 facing the vertical direction.
- the mold 51 located on the upper side in FIG. 24 was moved downward toward the mold 50 located on the lower side. Then, the wire barrel 19 was pressed from above by the lower surface of the mold 51. Further, by moving the mold 51 downward, the wire barrel 19 was crimped around the outer periphery of the core wire 13. Thus, the electric wire 10 with a terminal metal fitting which concerns on Experimental example 4 was produced. At this time, the wire compression rate of the core wire 13 was 60%.
- the wire compression ratio is ⁇ (cross-sectional area of the core wire after the crimping portion is crimped) / (cross-sectional area of the core wire before the crimping portion is crimped) ⁇ ⁇ 100, and the crimping portion is crimped. It is defined as a percentage of the cross-sectional area of the core wire after the cross-sectional area of the core wire before the crimping part is crimped.
- reducing the wire compression rate means compressing the core wire with a large pressure (high compression)
- increasing the wire compression rate means that the core wire It means compressing with a small pressure (low compression).
- the fixing force between the electric wire 11 and the wire barrel 19 was measured for the electric wires 10 with terminal fittings according to Experimental Examples 4 to 6 created as described above.
- the electric wire 11 and the female terminal fitting 12 connected to the wire barrel 19 were each held with a jig, and a tensile test was performed at 100 mm / second.
- the stress when the electric wire 11 and the wire barrel 19 were separated from each other was defined as a fixing force.
- the fixing force was measured for 20 samples, and the average value is shown in FIG. In FIG. 26, the maximum value and the minimum value of the sample are indicated by error bars.
- the wire compression rate was 60%.
- the electric wires 10 with terminal fittings according to Experimental Examples 4 to 6 showed a value of 650 N or more. Moreover, the variation (difference between the maximum value and the minimum value) between samples in each experimental example was 100 N or less.
- the fixing force of the electric wire 10 with terminal fittings according to Experimental Examples 7 to 9 was 630 N or less. Further, the variation among samples in each experimental example was larger than those in experimental examples 4 to 6. For example, the variation between samples was about 170 N in Experimental Example 7 and about 160 N in Experimental Example 8. The fixing force of the electric wire 10 with terminal fittings according to Experimental Examples 7 to 9 is sufficiently high, and the variation between samples is sufficiently small, but the electric wire with terminal fittings according to Experimental Examples 4 to 6 Ten was better.
- FIG. 28 a second embodiment of the present invention will be described with reference to FIGS.
- the core wire 13 exposed at the end of the electric wire 11 is sandwiched between a pair of jigs 16 and 16.
- the length dimension of the core wire 13 is set so as to be disposed over substantially the entire area of the jig 16.
- the end of the core wire 13 is cut into a predetermined length by a known method such as a cutter. Thereby, the cutting part 60 is formed in the front-end
- each strand 15 does not necessarily extend uniformly. For this reason, when the core wire 13 is exposed at the end of the electric wire 11 and ultrasonic vibration is applied to the core wire 13, there is a concern that the ends of the strands 15 become uneven at the end of the core wire 13. If the wire barrel 19 is to be crimped to the core wire 13 in such a state, the dimensional accuracy between the core wire 13 and the wire barrel 19 is lowered, and a positional shift may occur between the electric wire 11 and the female terminal fitting 12. Concerned.
- the core wire 13 is cut in the roughened region 17 to which ultrasonic vibration is applied in the core wire 13, it is possible to prevent the ends of the strands 15 from becoming uneven on the cut surface of the core wire 13. As a result, it is possible to suppress positional deviation between the electric wire 11 and the female terminal fitting 12.
- the core wire 13 is installed over substantially the entire area of the jig 16 that applies ultrasonic vibration to the core wire 13, the ultrasonic vibration is applied to the core wire 13 substantially evenly.
- region 17 the surface of the strand 15 is roughened substantially equally.
- the wire barrel 19 is crimped, the strands 15 are rubbed against each other, so that the new surface of the strand 15 is evenly exposed. Thereby, the electrical connection reliability of the strands 15 can be improved.
- the present invention is not limited to the embodiments described with reference to the above description and drawings.
- the following embodiments are also included in the technical scope of the present invention.
- the roughened region 17 is formed in a region wider than the bonded region 24.
- the present invention is not limited to this, and the roughened region 17 and the bonded region 24 are the same.
- the roughened region 17 may be formed in a part of the pressure-bonded region 24.
- the angle between the direction in which the core wire 13 is sandwiched by the pair of jigs 16 and 16 and the direction in which the wire barrel 19 is sandwiched by the mold is arbitrary. For example, as shown in FIG.
- the wire barrel 19 may be crimped to the core wire 13 so that the direction in which the core wire 13 is sandwiched by 16 and 16 and the direction in which the wire barrel 19 is sandwiched by the mold intersect. (3) If the roughening area
- the shape of the wire barrel 19 may be any shape as necessary.
- the terminal fitting is the female terminal fitting 12 having the cylindrical connecting portion 20, but is not limited thereto, and may be a male terminal fitting having a male tab or penetrating through a metal plate material.
- a so-called LA terminal in which a hole is formed may be used, and a terminal fitting having an arbitrary shape may be used as necessary.
- the electric wire 11 is a covered electric wire that covers the outer periphery of the core wire 13 with the insulating coating 14. However, the electric wire 11 is not limited to this, and the shielded electric wire 11 may be used. 11 can be used.
- the terminal metal fitting of the said embodiment was the wire barrel 19 and the connection part 20 which were arranged side by side, it is not restricted to this, The terminal metal fitting which does not have the connection part 20 may be sufficient.
- the insulation coating 14 is peeled off at the terminal portion of one electric wire 11 to expose the core wire 13, and the other electric wire 11 is Has a so-called intermediate splice structure in which the insulation coating 14 is peeled off at the intermediate portion to expose the core wire 13 and each of the two exposed core wires 13 is caulked with one of the pair of wire barrels 19 one by one. It is good also as a terminal metal fitting.
- the core wire 13 is exposed at the intermediate portion of the two electric wires 11 and the exposed intermediate portions are crimped by one of the pair of wire barrel pieces. You may do it.
- the core wire 13 is plastically deformed into a flat prismatic shape (rectangular shape) by the jig 16, and ultrasonic vibration is applied to the plastic deformation portion.
- the present invention is not limited to this. You may make it give an ultrasonic vibration to the plastic deformation part plastically deformed to squares other than a square pillar shape. Further, ultrasonic vibration may be applied to a plastically deformed portion that is plastically deformed other than a quadrilateral polygon.
- a plastic deformation portion 32 in which a circular core wire 13 is plastically deformed into a hexagon using jigs 30 and 31 made of a metal upper die and a lower die is provided.
- a plastic deformation part other than a polygon may be formed.
- ultrasonic vibration is generated in the plastic deformation part 33 in which the core wire 13 is plastically deformed into an ellipse by a jig (die). May be given.
- the ultrasonic deformation is applied after forming a plastic deformation portion 34 having a circular reduced diameter portion in which the diameter of the core wire 13 is reduced (reduced) by a jig. Also good.
- plastic deformation part 34 (reduction diameter part)
- grooves 38 and 39 curved in a semicircular shape (arc) are formed on the outer peripheral surface of the pair of upper and lower rolls 36 and 37 of the roll machine 35. If the core wire 13 is crushed in the circular hole formed by the grooves 38 and 39 of both rolls 36 and 37, the plastic deformation portion 34 (reduced diameter portion) is formed as shown in FIG. Good. And after forming the plastic deformation part 34 (reduction diameter part), as shown in FIG.
- tool which has the semicircular groove parts 40 and 41 (recessed part) of the same diameter as the plastic deformation part 34 (reduction diameter part) What is necessary is just to give an ultrasonic vibration to the core wire 13 via 42,43 (jig which does not plastically deform a core wire).
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Abstract
Description
11...電線
12...雌端子金具(端子金具)
14...絶縁被覆
15...素線
16,30,31,42,43...治具(金型)
17...粗化領域
19...ワイヤーバレル(圧着部)
24...被圧着領域
50,51...金型
60...切断部
図1に示すように、電線11は、芯線13の外周を絶縁被覆14で包囲してなる。芯線13は、アルミニウム、若しくはアルミニウム合金、又は銅、若しくは銅合金等、必要に応じて任意の金属を用いることができる。本実施形態においてはアルミニウム又はアルミニウム合金が用いられている。芯線13は、多数の素線15を撚り合わせた撚り線からなる。電線11の端末からは、絶縁被覆14が所定の長さだけ剥がされることにより、芯線13が露出している。
雌端子金具12は、図示しない金属板材を所定形状にプレス成形してなる。雌端子金具12は、電線11の絶縁被覆14に外側から巻き付くように圧着される一対のインシュレーションバレル18が形成されている。インシュレーションバレル18の図1における左方に位置には、インシュレーションバレル18に連なって、電線11の芯線13に外側から巻き付くように圧着されるワイヤーバレル19(請求の範囲に記載の圧着部に相当)が形成されている。
以下に、超音波振動が素線間抵抗に与える影響についてのモデル実験を行った。このモデル実験により、複数の素線15からなる芯線13に超音波振動を与えることにより、素線15間の電気抵抗を低減できることが認められた。
まず、金属板材をプレス加工することにより、所定の形状に成形した。その後、所定形状に形成された金属板材を曲げ加工することで接続部20を形成した。
治具16の接触圧を1bar、加えたエネルギーを60Wsとした以外は、実験例1と同様にして端子金具付き電線10を作製した。
治具16の接触圧を0.5bar、加えたエネルギーを30Wsとした以外は、実験例1と同様にして端子金具付き電線10を作製した。
金属板材をプレス加工することにより、所定の形状に成形した。その後、所定形状に形成された金属板材を曲げ加工することで接続部20を形成した。その後、電線11の絶縁被覆14を剥がして芯線13を露出した後、露出した芯線13にワイヤーバレル19を圧着することで端子金具付き電線10を作製した。
(粗化領域17)
図13に示すように、超音波振動が与えられていない比較例1に係る素線15の表面は、比較的に平滑である。図14に示すように、素線15の表面を拡大して観察しても、その表面は比較的に平滑になっている。
図15に、実験例1ないし実験例3、及び比較例1において測定された素線15間の電気抵抗を示す。図15に示すように、芯線13に超音波振動が与えられた実験例1ないし実験例3においては、素線15間の電気抵抗は10mΩよりも小さく、十分に小さな電気抵抗値を示した。これに対し、芯線13に超音波振動が与えられなかった比較例1においては、素線15間の電気抵抗は、60mΩと、大きな値を示した。
以下に、芯線13に超音波振動を与えることにより素線15同士が溶接された場合における、ワイヤーバレル19に載置された芯線13の姿勢と、一対の金型50,51でワイヤーバレル19及び芯線13を挟む方向との関係についての実験結果を示す。
図24に、ワイヤーバレル19を芯線13に圧着する途中の工程を示す。図24に示すように、実験例4においては、図24における下側に位置する金型50の上面にワイヤーバレル19を載置した。このワイヤーバレル19の上面に芯線13を載置した。この芯線13は、一対の治具16,16に挟み付けられて超音波振動を与えられることにより、芯線13を構成する素線15が互いに溶接されている。
電線圧縮率を70%とした以外は、実験例4と同様にして、端子金具付き電線10を作製した。
電線圧縮率を80%とした以外は、実験例4と同様にして、端子金具付き電線10を作製した。
上記のようにして作成した実験例4乃至6に係る端子金具付き電線10に対して、電線11とワイヤーバレル19との間の固着力を測定した。電線11と、ワイヤーバレル19に連なる雌端子金具12と、をそれぞれ治具で把持し、100mm/秒で引っ張り試験を実施した。電線11とワイヤーバレル19とが離間したときの応力を固着力とした。20個のサンプルについて固着力を測定し、平均値を図26に示した。また、図26において、サンプルの最大値と最小値とを、エラーバーにより示した。
上記のようにして作成した実験例4乃至6に係る端子金具付き電線10に対して、芯線13とワイヤーバレル19との間の電気抵抗値を測定し、平均値を求めた。結果を図26に示す。
図25に示すように、実験例7においては、芯線13のうち扁平な面が水平方向を向く姿勢で、芯線13をワイヤーバレル19の上面に載置した。
電線圧縮率を70%とした以外は、実験例7と同様にして、端子金具付き電線10を作製した。
電線圧縮率を80%とした以外は、実験例7と同様にして、端子金具付き電線10を作製した。
上記のようにして作成した実験例7乃至9に係る端子金具付き電線10に対して、上記と同様にして固着力を測定した。結果を図27に示す。
上記のようにして作成した実験例7乃至9に係る端子金具付き電線10について、上記と同様にして電気抵抗値を測定した。結果を図27に示す。
図26に示すように、実験例4乃至6に係る端子金具付き電線10においては、芯線13とワイヤーバレル19との間の電気抵抗値は、1.0mΩよりも低い値を示した。また、図27に示すように、実験例7乃至9に係る端子金具付き電線10においても同様に、芯線13とワイヤーバレル19との間の電気抵抗値は、1.0mΩよりも低い値を示した。このように、芯線13に超音波振動を加えることにより、芯線13とワイヤーバレル19との間の電気抵抗値を低減できることを確認した。
続いて、本発明の実施形態2を図28ないし図30を参照しつつ説明する。図28に示すように、本実施形態においては、電線11の端末において露出された芯線13は、一対の治具16,16の間に挟み付けられる。このとき、芯線13の長さ寸法は、治具16の略全域に亘って配されるように設定されている。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)本実施形態においては、粗化領域17は被圧着領域24よりも広い領域に形成される構成としたが、これに限られず、粗化領域17と被圧着領域24とが同じであってもよいし、また、被圧着領域24の一部に粗化領域17が形成される構成としてもよい。
(2)一対の治具16,16によって芯線13を挟む方向と、金型によってワイヤーバレル19を挟む方向とのなす角度は任意であって、例えば、図16に示すように、一対の治具16,16によって芯線13を挟む方向と、金型によってワイヤーバレル19を挟む方向とが交差する姿勢で、ワイヤーバレル19を芯線13に圧着してもよい。
(3)超音波振動を与えることによって素線15の表面に粗化領域17が形成されていれば、素線15同士は互いに溶接されていなくてもよい。また、一旦溶接された素線15同士をほぐした後に、ワイヤーバレル19に圧着する構成としてもよい。
(4)ワイヤーバレル19は、互いに電線11の延びる方向にずれた配置で芯線13に圧着されてもよく、また、3本以上に分岐したワイヤーバレル片が左右両側から互い違いに形成されていてもよく、また、ワイヤーバレル片が1本のみ形成されて芯線13に圧着されていてもよく、ワイヤーバレル19の形状は必要に応じて任意の形状としうる。
(5)本実施形態においては、端子金具は筒状の接続部20を有する雌端子金具12としたが、これに限られず、雄タブを有する雄端子金具としてもよいし、また金属板材に貫通孔が形成されたいわゆるLA端子としてもよく、必要に応じて任意の形状の端子金具とすることができる。
(6)本実施形態においては、電線11は、芯線13の外周を絶縁被覆14で覆う被覆電線としたが、これに限られず、シールド電線11を用いてもよく、必要に応じて任意の電線11を用いることができる。
(7)上記実施形態の端子金具は、ワイヤーバレル19と接続部20とが並んで配されていたものであったが、これに限られず、接続部20を有さない端子金具でもよい。例えば、図17に示すように、2本の電線11の芯線13を接続するに際して一本の電線11の端末部にて絶縁被覆14を剥ぎ取り芯線13を露出させ、もう一本の電線11については、中間部にて絶縁被覆14を剥ぎ取り芯線13を露出させ、これら露出させた2本の芯線13の一本ずつを一対のワイヤーバレル19のうちの片方ずつでかしめるいわゆる中間スプライス構造の端子金具としてもよい。さらに、他の中間スプライス構造として、図示はしないが、共に2本の電線11の中間部にて芯線13を露出させ、露出させた中間部同士を一対のワイヤーバレル片のうちの片方ずつで圧着するものでもよい。
また、多角形以外の塑性変形部を形成してもよく、例えば、図19に示すように、治具(金型)により芯線13を楕円形に塑性変形させた塑性変形部33に超音波振動を与えるようにしてもよい。更に、図20に示すように、治具により芯線13の径が縮径された(小さくされた)円形の縮径部を有する塑性変形部34を形成してから超音波振動を与えるようにしてもよい。なお、塑性変形部34(縮径部)の形成方法としては、治具(金型)だけでなく、ロールプレス加工を用いてもよい。具体的には、図21に示すように、ロール機35の上下一対のロール36、37の外周面には、半円形状(円弧)に湾曲した溝38,39が形成されており、図22に示すように、両ロール36、37の溝38,39により形成される円形孔の部分に芯線13が押し潰されることで、塑性変形部34(縮径部)が形成されるようにすればよい。そして、塑性変形部34(縮径部)を形成した後に、図23に示すように、塑性変形部34(縮径部)と同一径の半円形の溝部40,41(凹部)を有する治具42,43(芯線を塑性変形させない治具)を介して芯線13に超音波振動を与えるようにすればよい。
Claims (11)
- 複数の素線からなる芯線を有する電線と、前記電線から露出する前記芯線に圧着される圧着部を有する端子金具と、を備えた端子金具付き電線の製造方法であって、
前記芯線の外周面を覆う絶縁被覆を剥離して前記芯線を露出させる工程と、
露出した前記芯線を一対の治具で挟んで、前記治具により前記芯線に超音波振動を与える工程と、
前記芯線のうち、超音波振動が与えられた領域を含む領域に外側から巻き付けるようにして前記圧着部を圧着する工程と、を実行する端子金具付き電線の製造方法。 - 前記複数の素線を、超音波振動を与えることにより互いに溶接する請求の範囲第1項に記載の端子金具付き電線の製造方法。
- 前記芯線に前記圧着部を圧着する工程は、前記圧着部と前記芯線とを重ねて載置した状態で一対の金型で挟み、前記一対の金型で前記圧着部を押圧することにより実行するものであって、前記芯線のうち前記一対の治具で挟まれた面が、前記一対の金型で挟む方向を向く姿勢で前記芯線を前記圧着部に載置する請求の範囲第1項または請求の範囲第2項に記載の端子金具付き電線の製造方法。
- 前記芯線に対して、前記芯線のうち前記圧着部が圧着される被圧着領域と、同じか又はやや広い領域に超音波振動を与える請求の範囲第1項ないし請求の範囲第3項のいずれか一項に記載の端子金具付き電線の製造方法。
- 前記芯線のうち超音波振動が与えられた領域において、前記芯線を切断する工程を実行する請求の範囲第1項ないし請求の範囲第4項のいずれか一項に記載の端子金具付き電線の製造方法。
- 前記素線はアルミニウム又はアルミニウム合金からなる請求の範囲第1項ないし請求の範囲第5項のいずれか一項に記載の端子金具付き電線の製造方法。
- 複数の素線からなる芯線を含む電線と、前記電線から露出する前記芯線に圧着される端子金具と、を備えた端子金具付き電線であって、
前記電線から露出する芯線を構成する素線の表面には、前記素線に超音波振動が与えられることにより粗化領域が形成されており、
前記端子金具は前記芯線の外側に巻き付くように圧着される圧着部を有しており、前記圧着部は、前記芯線のうち前記粗化領域を含む領域に圧着されている端子金具付き電線。 - 前記複数の素線は、超音波振動が与えられることにより互いに溶接されている請求の範囲第7項に記載の端子金具付き電線。
- 前記粗化領域は、前記芯線のうち前記圧着部が圧着される被圧着領域と、同じか又はやや広い領域に形成されている請求の範囲第7項または請求の範囲第8項に記載の端子金具付き電線。
- 前記芯線は、前記芯線のうち前記粗化領域において切断された切断部を有する請求の範囲第7項ないし請求の範囲第9項のいずれか一項に記載の端子金具付き電線。
- 前記素線はアルミニウム又はアルミニウム合金からなる請求の範囲第7項ないし請求の範囲第10項のいずれか一項に記載の端子金具付き電線。
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WO2012026616A1 (en) * | 2010-08-25 | 2012-03-01 | Yazaki Corporation | Method for Shaping Electric Wire End and Mold for Shaping Electric Wire End |
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US10826261B2 (en) | 2017-11-28 | 2020-11-03 | Yazaki Corporation | Method for manufacturing terminal-equipped electric wire, and terminal-equipped electric wire |
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Also Published As
Publication number | Publication date |
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DE112009001147T8 (de) | 2012-08-23 |
JP2011082127A (ja) | 2011-04-21 |
JP5428789B2 (ja) | 2014-02-26 |
CN102089940A (zh) | 2011-06-08 |
DE112009001147T5 (de) | 2011-05-12 |
US20110094797A1 (en) | 2011-04-28 |
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