WO2014129234A1 - 圧着端子、接続構造体及び、接続構造体の製造方法 - Google Patents
圧着端子、接続構造体及び、接続構造体の製造方法 Download PDFInfo
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- WO2014129234A1 WO2014129234A1 PCT/JP2014/050593 JP2014050593W WO2014129234A1 WO 2014129234 A1 WO2014129234 A1 WO 2014129234A1 JP 2014050593 W JP2014050593 W JP 2014050593W WO 2014129234 A1 WO2014129234 A1 WO 2014129234A1
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- Prior art keywords
- crimping
- conductor
- crimp
- terminal
- crimped
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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
- 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
- H01R4/187—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 combined with soldering or welding
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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
- 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
- H01R4/16—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 bending
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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
- 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
- H01R4/20—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 using a crimping sleeve
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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
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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
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
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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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/10—Sockets for co-operation with pins or blades
- H01R13/11—Resilient sockets
- H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
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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
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/26—Connectors or connections adapted for particular applications for vehicles
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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
- 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
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- 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
- Y10T29/49181—Assembling terminal to elongated conductor by deforming
- Y10T29/49183—Assembling terminal to elongated conductor by deforming of ferrule about conductor and terminal
Definitions
- the present invention relates to a crimp terminal, a connection structure, and a method for manufacturing the connection structure that are attached to, for example, a connector of an automobile wire harness.
- An electrical equipment equipped in an automobile or the like constitutes an electrical circuit by being connected to another electrical equipment or a power supply device via a wire harness in which covered electric wires are bundled.
- the wire harness and the electrical equipment and the power supply device are connected to each other by connectors attached thereto.
- These connectors have a configuration in which a crimp terminal connected by crimping to a covered electric wire is mounted inside, and a female connector and a male connector that are connected corresponding to the unevenness are fitted.
- the conductive member disclosed in Patent Document 1 is one of such crimp terminals.
- the “conductive member” disclosed in Patent Document 1 includes a fastening portion that is a base material provided with a connection surface connected to another member, and an electric wire that protrudes from the fastening portion and fastens a distal end portion of the electric wire. It consists of a connection part.
- the electric wire connecting portion has an insertion hole into which the tip of the electric wire can be inserted, and is formed in a cylindrical shape having an open end on the protruding direction.
- the connection of the electric wire to the “conductive member” of Patent Document 1 is performed by inserting the conductor tip portion from which the insulating coating on the tip end side of the electric wire has been peeled into the insertion hole of the wire connection portion, and crimping the wire connection portion in that state. Can be crimped.
- the electric wire connecting portion of the “conductive member” disclosed in Patent Document 1 is a cylindrical shape formed of a so-called closed barrel type, and has a higher rigidity than a so-called open barrel type in which a part of the circumferential direction is open, Furthermore, when forming an electric wire connection part, there exists a possibility that the electric wire connection part may be work-hardened.
- an object of the present invention is to provide a crimp terminal, a connection structure, and a method for manufacturing the connection structure that can stabilize the crimp resistance.
- the present invention relates to a crimping part that allows a crimp connection of at least the conductor tip part in a coated electric wire provided with a conductor tip part in which a conductor is coated with an insulation coating and the conductor coating part is exposed by peeling off the insulation coating on at least the tip side.
- the crimping portion is formed into a cylindrical shape by bending a portion corresponding to the crimping portion of the terminal base of the terminal development shape around the terminal axis, and the butting end where the portion corresponding to the crimping portion is abutted Forming a welded portion welded to the butt end portion along the longitudinal direction of the crimping portion, and the crimping portion is plastically deformed as the welded portion is crimped to the conductor tip portion of the crimping portion. It is characterized in that it is formed at a plastically deformed portion where the amount of deformation is larger than the peripheral portion in the circumferential direction of the crimping portion.
- the means for forming the welded portion at the butt end is not particularly limited, for example, gas welding, electric resistance welding, or laser welding, and is not particularly limited as long as it is a means capable of applying heat to anneal the butt end. do not do.
- the plastic deformation location is not limited to the location where the amount of deformation is the largest in the circumferential direction of the crimping portion, but is a location where the amount of deformation is locally increased compared to the peripheral portion in the circumferential direction of the crimping portion. Good.
- the amount of deformation indicates the degree of change in the shape of the crimped portion after crimping compared to the shape of the crimped portion before crimping.
- the amount of compression, the amount of elongation (tensile amount), the amount of bending, and the amount of displacement At least one of (movement amount).
- the plastic deformation of the crimping part may be a change in shape accompanied by plastic deformation, and the predetermined portion in the circumferential direction of the crimping part is not limited to bend deformation, but may be displaced by compression or tension, for example. This also includes changing the shape.
- the conductor may be a stranded wire or a single wire obtained by twisting an element wire, and may be formed of an aluminum-based conductor made of aluminum or an aluminum alloy, for example, to a metal constituting the crimp terminal.
- the present invention is not limited to this.
- it may be formed of a copper-based conductor made of copper or a copper alloy, and may be formed of the same metal as the crimp terminal. .
- the terminal formed through cold working such as a punching process of punching a terminal having a developed terminal shape from a base material and a bending process of bending a portion corresponding to the crimping portion of the punched terminal into a cylindrical shape is described above.
- the hardness is several times that of the terminal base material before the cold working.
- the crimping part removes not only distortion corresponding to the welded part but also non-welded parts other than the welded part, such as bending, and distortion (dislocation) due to work hardening caused by the process before crimping. be able to.
- the plastic deformation location forming the welded portion is excellent annealing, especially in the crimped portion that is work-hardened when forming through cold working. An effect can be obtained.
- the heat applied to the butt end portion is conducted to the plastic deformation portion when forming the welded portion.
- the annealing effect can be obtained also for the plastically deformed portion formed in the portion other than the welded portion.
- the non-welded part other than the welded part does not directly apply heat when welding, like the butt end part, the temperature of annealing is suppressed more than the welded part, and an appropriate annealing effect can be obtained. it can.
- the plastic deformation location at locations other than the welded portion can obtain an annealing effect with an appropriate hardness having strength that does not cause cracking during crimping.
- the crimping portion in the cross section orthogonal to the longitudinal direction, is formed so that both sides of the virtual axis line that linearly connects the central portion of the cross section of the crimping portion and the welded portion are symmetrical.
- the plastic deformation location can be formed on both sides of the virtual axis in the circumferential direction of the crimping portion.
- the heat applied as the butt end portion is welded to the plastic deformation portions formed on both sides of the virtual axis in the circumferential direction of the crimping portion.
- the annealing effect can be obtained also for the plastic deformation portion which is a portion other than the welded portion.
- the plastic deformation locations formed on both sides of the imaginary axis in the circumferential direction of the crimping portion are lower in annealing temperature than the plastic deformation locations where the welded portion is formed, so that the strength does not cause cracking during crimping.
- An annealing effect with an appropriate hardness can be obtained.
- the plastic deformation locations formed on both sides of the virtual axis in the circumferential direction of the crimping portion can be plastically deformed without cracking due to the crimping in the same manner as the plastic deformation locations forming the welded portion. it can.
- the crimping portion is crimped to the conductor tip by forming the crimping portion so that the orthogonal cross section after crimping is symmetrical on both sides of the virtual axis passing through the welded portion. At this time, the welded portion can be plastically deformed without causing cracks.
- the orthogonal cross section of the crimping part after crimping is formed so that both sides of the virtual axis passing through the welded part are symmetrical. Since the stress applied to the welded portion can be applied equally to both sides of the welded portion, it is possible to prevent the welded portion from being cracked as a result.
- the amount of deformation at which the crimping portion is plastically deformed is set to a displacement amount that is displaced as the crimping portion is plastically deformed, and the plastic deformation portion where the welded portion is formed is defined as the displacement amount.
- the welded portion is formed at the plastic displacement portion, by welding the butt end portion, for example, the crimping portion is bent into a cylindrical shape, and the work is hardened along with the process before the crimping. As a result, it is possible to anneal the plastic displacement portion where the ductility is lowered.
- the plastic displacement portion can obtain excellent extensibility, and when the crimping portion is crimped, the plastic displacement portion is largely displaced as compared with the peripheral portion as it is compressed. It can be securely deformed without cracking.
- the welded portion can be annealed by welding the butt end portions, the hardness can be sufficiently reduced.
- Such a welded portion has the displacement amount larger than that of the peripheral portion.
- the weld portion is disposed at a location where the bending deformation amount becomes smaller than that of the peripheral portion, that is, the plastic deformation portion.
- the welded part is not forced to bend and deformed by applying a large stress, for example, as the crimped part is crimped to the tip of the conductor, so that cracking occurs even if the welded part is sufficiently reduced in hardness. And can be reliably plastically deformed.
- the plastic bending deformation causes the predetermined portion to be compared with the plastic displacement.
- the load applied to the part becomes large and is easily damaged.
- the plastic bending deformation can be said to be a plastic deformation in which a predetermined portion in the circumferential direction of the crimping portion is likely to be damaged when the crimping portion is crimped to the conductor tip as compared with the plastic displacement.
- the welded portion at the plastic displacement portion instead of the plastic bending deformation portion, the sufficient annealing effect by forming the welded portion at the butt end portion, Even when the hardness is too lower than the desired hardness, when the crimping part is crimped to the conductor tip part, the welded part can be reliably plastically deformed without being damaged.
- the deformation amount at which the crimping portion is plastically deformed is set to a bending deformation amount that bends and deforms as the crimping portion is plastically deformed, and on both sides of the virtual axis in the circumferential direction of the crimping portion.
- the formed plastic deformation portion can be formed as a plastic bending deformation portion where the amount of bending deformation is larger than that of the peripheral portion.
- the plastic bending deformation portion by placing the plastic bending deformation portion at a portion other than the welded portion in the circumferential direction of the crimping portion, the plastic bending deformation portion can be directly applied when welding the butt end portion. Therefore, annealing can be performed at an annealing temperature lower than that of the welded portion.
- the plastic bending deformation portion is forced to undergo a large bending deformation as compared with the peripheral portion, but can be firmly bent and deformed following the crimping blade mold.
- the pressure-bonding portion is formed in an orthogonal cross section in which the cross-section of the pressure-bonded portion after pressure bonding is a U-shape.
- the upper portion is below the intermediate portion in the width direction of the pressure-bonding portion in a state where the orthogonal cross section of the pressure-bonding portion is viewed from the front.
- the plastic displacement portion displaced in a concave shape is formed.
- the annealing effect by forming the welded portion at the plastic displacement location can remove the processing strain of the plastic displacement location, and the plastic displacement location is reliably plastically deformed with a larger displacement amount than the peripheral portion. be able to.
- the bending deformation is performed so as to protrude upward on both outer sides in the width direction of the pressure-bonding portion. A plastic bending deformation location is formed.
- compression-bonding part in the orthogonal cross section in which the orthogonal cross section of the said crimping
- a location corresponding to the welded portion in the circumferential direction of the pressure-bonding portion That is, a plastic displacement portion is formed in which the intermediate portion in the width direction of the crimping portion is displaced inwardly in the thickness direction.
- the processing strain at the plastic displacement location can be removed, and the plastic displacement location can be reliably plastically deformed with a larger displacement amount than the surrounding portion. Can do.
- the pressure-bonding portion having an H-shaped orthogonal cross section in the state where the orthogonal cross section of the pressure-bonding portion is viewed from the front, on both outer sides in the width direction of the pressure-bonding portion and on both outer sides in the width direction of the pressure-bonding portion. Is formed with a plastic bending deformation portion that bends and deforms so as to protrude to both sides in the thickness direction.
- the deformation amount at which the crimping portion is plastically deformed is set to a bending deformation amount that is bent and deformed as the crimping portion is plastically deformed, and the plastic deformation portion formed at the welded portion is It can be formed as a plastic bending deformation location where the amount of bending deformation becomes larger than that of the peripheral portion.
- the plastic deformation portion that has been work hardened by a pre-crimping process such as bending the crimping portion into a cylindrical shape is securely annealed. be able to.
- the pressure-bonding portion is formed in a cross-sectional shape in which an orthogonal cross section of the pressure-bonded portion after pressure bonding has a cross shape having the protrusions on the top, bottom, left and right.
- the protruding part protruding in the radially outward direction in the circumferential direction of the crimping part is a state where the orthogonal cross section of the crimping part is viewed from the front. Since the amount of bending deformation is larger than that of the peripheral portion, it is formed as a plastic bending deformation portion.
- the portion corresponding to the plastic bending deformation portion is greatly bent and deformed as compared with the peripheral portion as the crimping portion is compressed. Even if it does not generate
- the present invention includes a crimping portion that allows crimping connection of the tip of the conductor in which the conductor is exposed by peeling off the insulation coating on the tip side of the covered electric wire in which the conductor is coated with the insulation coating by a predetermined length.
- tip part can be comprised, a crimping
- this invention is provided with the connector housing which can accommodate the said crimp terminal in the said connection structure while providing multiple crimp connection structures mentioned above, It is a wire harness which has arrange
- the present invention also includes a punching step of punching the base material into a terminal deployment shape to form a terminal base material, a bending step of bending a portion corresponding to the crimping portion of the terminal base material around a terminal axis to form a tubular shape, A method for manufacturing a crimp terminal, in which a welding step is formed in this order along a longitudinal direction at a butted end portion where the portion corresponding to the crimped portion is butted in the circumferential direction.
- At least a conductor tip portion that comprises a crimp terminal having a cylindrical crimp portion, and the insulation coating on the tip side of the covered electric wire in which the conductor is coated with an insulation coating is peeled off by a predetermined length to expose the conductor
- a connection structure for crimping and connecting the crimp terminal and the covered wire by performing in this order a wire insertion step of inserting the crimp portion into the crimp portion before crimping and a crimping step of crimping the crimp portion to at least the conductor tip.
- the plasticity in which the amount of deformation of the crimping portion plastically deformed as a result of the crimping of the crimping portion with respect to the conductor tip by the crimping step is larger than the peripheral portion in the circumferential direction of the crimping portion.
- the crimping portion corresponding portion is bent so that the butt end portion of the crimping portion corresponding portion is disposed at the deformed portion.
- the terminal base material is work-hardened by performing cold working such as a punching process and a bending process on the base material.
- cold working such as a punching process and a bending process
- the butt end portion of the portion corresponding to the crimping portion is disposed at a plastic deformation portion where the deformation amount of the plastic deformation is larger than the peripheral portion in the circumferential direction of the crimping portion.
- the bending process is performed on the portion corresponding to the crimping portion, and at the butt end portion, a welding process is performed in which a welded portion obtained by welding the welded portion welded to the butt end portion is formed along the longitudinal direction.
- An annealing effect can be obtained in which distortion inside the crimped part that has been work-hardened by cold working is removed.
- compression-bonding part can improve the followable
- the butt end portion can be welded by fiber laser welding in the welding step.
- the fiber laser can focus on an extremely small spot as compared with other welding lasers, can realize high-power laser welding, and can continuously irradiate.
- the butt end portion can be reliably welded, and sufficient water stoppage can be secured even in the crimped state, and work hardening remaining in the crimped portion can be effectively eliminated.
- the crimping portion includes a conductor crimping portion that crimps the conductor tip portion, and a coating crimping portion that crimps the covering tip portion closer to the base end side than the conductor tip portion on the wire tip side.
- the conductor crimping portion and the covering crimping portion can be crimped simultaneously.
- the part is greatly plastically deformed, for example, a step is generated.
- the present invention by obtaining an annealing effect of removing the internal distortion of the crimping part due to work hardening, it is possible to avoid crimp cracking during crimping by improving followability to the crimping blade mold. Further, it is possible to provide a crimp terminal, a connection structure, and a method for manufacturing the connection structure that can stabilize the crimp resistance.
- FIG. 2 is a cross-sectional view taken along arrow AA in FIG. 1.
- the external appearance perspective view which shows the external appearance seen from diagonally upward in another crimp terminal.
- Sectional drawing which shows the cross section of the width direction in another U-shaped crimping
- compression-bonding part Sectional drawing which shows another crimping
- compression-bonding part Sectional drawing of the conductor crimping
- FIGS. 1 is an explanatory view for explaining the crimped connection structure 1
- FIG. 2 is a sectional view taken along the line AA in FIG. 1
- FIG. 3 is an explanatory view for explaining welding at the barrel portion 230. ing.
- an arrow X indicates the longitudinal direction (hereinafter referred to as “longitudinal direction X”)
- an arrow Y indicates the width direction (hereinafter referred to as “width direction Y”).
- the box part 210 side (left side in FIG. 1) described later is defined as the front
- the covered electric wire 100 side (right side in FIG. 1) described later with respect to the box part 210 is defined as the rear.
- the upper side in FIG. 1 is the upper side
- the lower side in FIG. 1 is the lower side.
- the crimp connection structure 1 is configured by crimping and connecting a covered electric wire 100 and a crimp terminal 200.
- the covered electric wire 100 is configured by covering an aluminum core wire 101 in which aluminum strands 101a are bundled with an insulating covering 102 made of an insulating resin. Further, the covered electric wire 100 exposes the aluminum core wire 101 having a predetermined length from the tip of the insulating covering 102.
- the crimp terminal 200 is a female terminal, and from a front side to a rear side in the longitudinal direction X, a box part 210 that allows insertion of a male tab of a male terminal (not shown), and a box part 210 And a barrel portion 230 that is disposed via a transition portion 220 having a predetermined length.
- the crimp terminal 200 is formed by punching a copper alloy strip (not shown) such as brass whose surface is tin-plated (Sn-plated) into a planarly expanded terminal shape, and then rearwardly viewing the box portion 210 of the hollow rectangular column body.
- a copper alloy strip such as brass whose surface is tin-plated (Sn-plated) into a planarly expanded terminal shape, and then rearwardly viewing the box portion 210 of the hollow rectangular column body.
- This is a closed barrel type terminal which is formed by bending into a three-dimensional terminal shape including a substantially O-shaped barrel portion 230 and welding the barrel portion 230.
- the box portion 210 is formed by bending one of the side surface portions 211 connected to both sides in the width direction Y orthogonal to the longitudinal direction X of the bottom surface portion (not shown) so as to overlap the other end portion. It is comprised by the hollow rectangular column body of the inversion of the substantially rectangular shape seeing from the front side.
- an insertion tab (not shown) of a male terminal is formed inside the box portion 210 by extending the front side in the longitudinal direction X of the bottom surface portion and bending it toward the rear in the longitudinal direction X. ) Is provided. In the present embodiment, detailed illustration of the elastic contact piece 212 is omitted.
- the barrel portion 230 is integrally formed with a coating crimping portion 231 that crimps the vicinity of the tip of the insulating coating 102 and a conductor crimping portion 232 that crimps the exposed aluminum core wire 101. More specifically, as shown in FIG.
- the barrel portion 230 rounds the copper alloy strip punched into a terminal shape so as to surround the outer periphery of the covered electric wire 100 with an inner diameter slightly larger than the outer diameter of the covered electric wire 100,
- the rounded end portions 230a are butted together at a portion corresponding to the barrel 230 corresponding to the barrel 230 of the crimp terminal 200, and are welded along the welded portion W in the longitudinal direction X to form a substantially O-shaped closed cross-sectional shape in the rear view.
- welding of the welding location W is performed by single focus fiber laser welding using the fiber laser welding apparatus FL.
- the fiber laser welding is welding using fiber laser light having a wavelength of about 1.08 ⁇ m. Since this fiber laser beam is an ideal Gaussian beam and can be focused to the diffraction limit, it is possible to construct a focused spot diameter of 30 ⁇ m or less that could not be realized with a YAG laser or a CO 2 laser. It is.
- the end portions 230a While irradiating the fiber laser beam from such a fiber laser welding apparatus FL and moving the fiber laser welding apparatus FL in the longitudinal direction X along the welding location W to anneal the welding location W, the end portions 230a are connected to each other. To form the barrel portion 230. A portion where the end portions 230a are welded is referred to as a welded portion 230b.
- the barrel part 230 has the sealing part 235 which deform
- a U-shaped conductor crimping portion 232 ⁇ / b> U obtained by crimping and an O-shaped coated crimping portion 231 ⁇ / b> O are formed in a crimped state in which the insulating crimped body 102 is crimped by deforming the coating crimping portion 231.
- the sealing part 235 is deformed so as to flatten the front end of the barrel part 230 with a predetermined crimping die (not shown), thereby sealing the front opening in the barrel part 230 before the crimping.
- the O-shaped coated crimping portion 231O is a crimped state in which the insulated crimped body 102 is crimped by deforming the coated crimped portion 231 into which the coated electric wire 100 is inserted into a substantially O-shaped cross section with a predetermined crimping die. Is configured.
- the U-shaped conductor crimping portion 232U deforms the conductor crimping portion 232, into which the covered electric wire 100 is inserted, with a pair of male and female molds 10 described later to crimp the aluminum core wire 101 as shown in FIG.
- the cross section is substantially U-shaped.
- the U-shaped conductor crimping portion 232U in the crimped state is deformed into a circular arc shape in which the lower surface side of the conductor crimping portion 232 protrudes downward in an orthogonal cross section orthogonal to the longitudinal direction X.
- the upper surface side of the crimping portion 232 is formed with an upper surface concave portion 234a that is deformed into a concave cross section with the approximate center in the width direction Y directed downward.
- the U-shaped conductor crimping portion 232U has a protruding portion 234T (corner portion) projecting upward on both outer sides in the width direction Y of the conductor crimping portion 232 in an orthogonal cross section orthogonal to the longitudinal direction X. ) Is formed. That is, in the crimped state, the U-shaped conductor crimping portion 232 ⁇ / b> U has a substantially U-shaped cross section orthogonal to the longitudinal direction X.
- the upper surface concave portion 234a is a portion that is compressively deformed in the circumferential direction of the conductor crimping portion 232 so that a displacement amount due to compression is larger than that of the peripheral portion.
- the protruding portion 234T is a portion that is bent and deformed in the circumferential direction of the conductor crimping portion 232 so that the amount of bending deformation is larger than that of the peripheral portion.
- FIG. 4 is an explanatory view for explaining the Vickers hardness in the barrel portion 230.
- FIG. 4A shows the measurement location of the Vickers hardness in the barrel portion 230
- FIG. 4B shows the measurement location.
- the ratio of the Vickers hardness of each measurement location with respect to P5 is shown.
- the measurement location of the Vickers hardness in the barrel portion 230 is a measurement point P1 measured at the substantially center in the circumferential direction in the welded portion 230b, and a circumferential boundary between the welded portion 230b and the non-welded portion.
- the measurement point P2 is measured
- the measurement point P3 is measured in the vicinity of the circumferential boundary
- the measurement point P4 is measured on the side of the barrel 230
- the measurement point P5 is measured on the lower surface of the barrel 230.
- the conductor crimping part 232 before fiber laser welding and the Vickers hardness are substantially the same value.
- the ratio of the Vickers hardness to the measurement point P5 at each measurement point of the barrel part 230 is 45.8% for the measurement point P1 and 48.0% for the measurement point P2. It was.
- the measurement points P1 and P2 are both welded portions, and are locations corresponding to the butt end portion 230a that directly performs fiber laser welding in the circumferential direction of the conductor crimping portion 232. Can be annealed firmly.
- the ratio of the Vickers hardness to the measurement point P5 at each measurement point of the barrel part 230 is 95.6% at the measurement point P3 and the measurement point P4 as shown in FIG. It became 96.5%.
- the measurement points P3 and P4 are both non-welded parts, and are not directly heated by fiber laser welding, but are indirectly heated by heat conduction in which the butt end parts 230a are heated.
- the Vickers hardness can be reduced by about 4% from the measurement point P5, and the annealing does not reduce the hardness excessively and can be annealed to an appropriate hardness.
- the positions corresponding to the measurement points P3 and P4 in the circumferential direction of the conductor crimping portion 232 before crimping can be annealed to a property that is harder and stronger and also has a tenacity compared to the measurement point P5.
- FIG. 5A and 5B are explanatory views for explaining the crimping process in the conductor crimping portion 232
- FIG. 5A shows a state before the crimping of the conductor crimping portion 232
- FIG. 5B shows the crimping of the conductor crimping portion 232.
- compression-bonding part 232U is shown.
- the tip end portion of the covered electric wire 100 with the aluminum core wire 101 exposed is inserted from the rear in the longitudinal direction X into the barrel portion 230 of the crimp terminal 200.
- the inner diameter of the barrel portion 230 is slightly larger than the outer diameter of the covered electric wire 100, the covered electric wire 100 is inserted into the barrel portion 230.
- the conductor crimping part 232 of the barrel part 230 into which the covered electric wire 100 is inserted is crimped in the vertical direction with a pair of male and female molds 10 to crimp the aluminum core wire 101 and the crimping terminal 200 as shown in FIG. .
- Detailed description of the crimping of the barrel portion 230 other than the conductor crimping portion 232 in the longitudinal direction X is omitted, but the covering crimping portion 231 of the barrel portion 230 is also different from the pair of male and female molds 10.
- the insulation coating 102 is crimped by crimping with an appropriate crimping die.
- the sealing portion 235 is formed by deforming the front end portion of the conductor crimping portion 232 so as to be crushed in a substantially flat shape by an appropriate crimping die different from the pair of male and female dies 10.
- the pair of male and female dies 10 has a length in the longitudinal direction X to which the conductor crimping portion 232 can be crimped, and as shown in FIG. And a male mold 12.
- the female die 11 is formed in a substantially inverted gate shape by the receiving groove portion 13 formed in a substantially U shape with a slightly smaller diameter than the outer diameter of the conductor crimping portion 232.
- the male mold 12 has a first convex part 14 projecting downward with a length in the width direction Y that fits into the receiving groove part 13 of the female mold 11, and a first convex part.
- 14 is formed in a cross-sectional shape having a crimping convex part 16 integrally formed with a second convex part 15 projecting downward and having a length in the width direction Y shorter than the length 14 in the width direction Y. ing.
- the inner surface shape constituted by the receiving groove portion 13 of the female die 11 and the crimping convex portion 16 of the male die 12 is the aluminum core wire 101.
- the conductor crimping part 232 into which is inserted is deformed to form a U shape in the crimped state.
- the crimping portion 232 is inserted between the male die 12 and the female die 11 so that the substantially central portion in the width direction Y of the second convex portion 15 of the male die 12 faces the welded portion 230b.
- the conductor crimping part 232 is plastically deformed so that the lower surface of the conductor crimping part 232 conforms to the inner surface shape of the receiving groove part 13 in the female mold 11, and the upper surface of the conductor crimping part 232 is the outer shape of the crimping convex part 16 in the male mold 12.
- the aluminum core wire 101 as shown in FIG. 2 is crimped plastically so as to conform to the shape, and the conductor crimping portion 232U is formed in a U shape in the crimped state.
- the U-shaped conductor crimping portion 232U is deformed into a circular arc shape in which the lower surface projects downward by the receiving groove 13 in the cross section in the width direction Y, and projects upward before crimping.
- the upper surface side is formed into a U-shaped cross section by being deformed into a concave cross section recessed downward by the crimping convex portion 16.
- the crimping connection structure 1 is formed in which the barrel portion 230 of the crimp terminal 200 is crimped and the covered electric wire 100 is crimped and connected, and the conductivity between the aluminum core wire 101 and the crimp terminal 200 is ensured.
- the manufacturing method of the crimp terminal 200, the crimp connection structure 1, and the crimp connection structure 1 that realizes the above-described configuration can avoid crimp cracking during crimping and stabilize the crimp resistance. Can do.
- a cold process such as a punching process for punching a terminal shape developed from a copper alloy strip and a bending process for bending a barrel-corresponding portion of the punched copper alloy strip before processing into a barrel portion 230 into a cylindrical shape. Since the crimp terminal 200 formed through the processing is work-hardened by the above-described cold processing, it is several times harder than the terminal base material before the cold processing.
- the upper surface concave portion 234a and the protruding portion 234T are locally plastically formed with a large amount of plastic deformation in the peripheral portion.
- the upper surface concave portion 234a is a portion that is compressed and deformed so that the amount of displacement is larger than that of the peripheral portion in the circumferential direction of the conductor crimping portion 232, and the protruding portion 234T is in the circumferential direction of the conductor crimping portion 232 In this case, the portion is bent and deformed so that the amount of bending deformation is larger than that of the peripheral portion.
- the upper surface concave portion 234a and the protruding portion 234T may cause crimp cracking or insufficient crimping when the barrel portion 230 of the crimp terminal 200 is crimped to the aluminum core wire 101 in the circumferential direction of the conductor crimp portion 232. Therefore, there is a possibility that the influence of the crimping resistance is increased.
- annealing is performed to remove strain inside the work-hardened barrel portion 230 by forming a welded portion 230b in which the end portions 230a are welded to each other in the circumferential direction of the conductor crimping portion 232. An effect can be obtained.
- a portion corresponding to the upper surface concave portion 234a in the circumferential direction of the conductor crimping portion 232 before crimping is a position corresponding to the above-described measurement points P1 and P2 in FIG. 4A, and FIG.
- the Vickers hardness can be greatly reduced as compared with the measurement point P5.
- the butt end portion 230a is provided at a position corresponding to the upper surface concave portion 234a in the circumferential direction of the conductor crimp portion 232 before crimping, the upper surface concave portion is formed when the butt end portion 230a is fiber laser welded.
- the portion corresponding to 234a can be sufficiently annealed.
- the barrel portion 230 of the crimp terminal 200 is crimped to the aluminum core wire 101, in the circumferential direction of the conductor crimp portion 232, in particular, a portion corresponding to the upper surface concave portion 234 is locally compared with the peripheral portion. Even if it is deformed with a certain amount of displacement, the upper surface concave portion 234 can be crimped in a state of firmly following the crimping blade mold without causing any crimp cracking.
- the portion corresponding to the protrusion 234T is a position corresponding to the measurement point P4 in FIG. 4A in the circumferential direction of the conductor crimping portion 232 or a position close to the measurement point P4.
- the Vickers hardness can be reduced by about 4% from the measurement point P5.
- the portions corresponding to the protruding portions 234T are located on both sides of the welded portion in the width direction of the conductor crimping portion 232 before crimping, when the welded end 230b is formed by fiber laser welding the butted end portions 230a to each other.
- the heat applied to the butt end portion 230a is not directly heated, but is conducted in the circumferential direction of the conductor crimping portion 232, and the conducted heat does not cause the hardness to decrease excessively. It can be annealed to a certain hardness.
- the protruding portion 234T can be annealed to a property that is hard, strong, and also has tenacity as described above.
- a portion corresponding to the protruding portion 234 ⁇ / b> T may be deformed with a local displacement amount compared to the peripheral portion.
- the protruding portion 234T can be crimped in a state in which the projecting portion 234T follows the crimping blade mold firmly without causing any crimp cracking.
- the barrel portion 230 can be firmly bonded to the exposed aluminum core wire 101 without a gap, excellent water-stopping and electrical conductivity can be obtained.
- the conductor crimping portion is subjected to local plastic deformation as compared with the peripheral portion, for example, after the work hardening of the upper concave portion 234 a, the protruding portion 234 T, or the like is eliminated in advance. Since the crimped connection structure 1 in which the H.232 and the aluminum core wire 101 are crimped can be configured, there is no crimp crack in the barrel portion 230, and the barrel portion 230 is firmly attached to the exposed aluminum core wire 101 without any gap. Thus, it is possible to obtain the crimped connection structure 1 capable of obtaining excellent water-stopping property and electrical conductivity that are crimped by the above.
- the end portion 230a is welded to each other by fiber laser welding, thereby forming a barrel portion 230 having no gap and manufacturing a crimp terminal 200 that can reliably prevent moisture from entering the barrel portion 230 in a crimped state. can do.
- the fiber laser can focus on an extremely small spot as compared with other welding lasers, can realize high-power laser welding, and can continuously irradiate. Therefore, it is possible to manufacture the crimp terminal 200 capable of ensuring sufficient water-stopping performance in a crimped state by performing welding having a certain water-stopping property.
- the core wire in the covered electric wire 100 is made of an aluminum alloy and the crimp terminal 200 is made of a copper alloy such as brass.
- the present invention is not limited thereto, and the core wire in the covered electric wire 100 and the crimp terminal 200 are made of brass or the like. You may comprise the same metal, such as copper alloy and aluminum alloy.
- the crimp terminal 200 is a female crimp terminal, the present invention is not limited to this, and a male crimp terminal that fits in the longitudinal direction X with respect to the female crimp terminal may be used.
- a substantially U-shaped or annular flat plate may be used.
- the aluminum core wire 101 is not limited to a single wire in which aluminum alloy wires as a plurality of strands are bundled, but may be configured as a stranded wire obtained by twisting a plurality of aluminum alloy wires.
- butt end portions 230a are welded to each other by fiber laser, the present invention is not limited to this.
- any welding method can be used as long as the end portions 230a are welded together and at least a part of the barrel portion 230 in the circumferential direction can be annealed.
- Other welding means such as gas welding may be used.
- the barrel part 230 was formed by the copper alloy strip punched out so that the covering crimping part 231 and the conductor crimping part 232 have substantially the same diameter, the present invention is not limited to this, but will be described later. You may form the barrel part 230 with the copper alloy strip
- the sealing part 235 was formed in the front-end
- the barrel portion 230 is a crimp terminal 200 formed in a substantially cylindrical shape, and when the covered electric wire 100 and the crimp terminal 200 are crimped and connected, the tip of the barrel portion 230 is crushed to form the sealing portion 235.
- the crimp terminal 200 may be formed by previously crushing the tip of the barrel portion 230 to form the sealing portion 235.
- FIG. 7 is an explanatory diagram for explaining another crimping process in the barrel part 230.
- the conductor crimping portion 232 and the coated crimping portion 231 into which the covered electric wire 100 is inserted are simultaneously crimped with a pair of crimping dies 20 constituted by the upper die 21 and the lower die 22, and in the crimped state, O
- a character-shaped covering crimping portion 231O and a U-shaped conductor crimping portion 232U may be formed.
- the boundary portion between the conductor crimping portion 232 and the covering crimping portion 231 is forced to have a large compressive deformation (plastic deformation) such as a step. become.
- the work hardening can be eliminated by the annealing effect.
- the crimp terminal 200 is configured such that the welded portion 230b is positioned in the upper surface concave portion 234a of the U-shaped conductor crimping portion 232U in the crimped state, but the present invention is not limited to this.
- FIG. 8 which is a cross-sectional view in the width direction Y of the crimping portion 232 ⁇ / b> U
- the crimping terminal 200 has the welded portion 230 b positioned substantially at the center in the width direction Y in the lower portion 230 u of the U-shaped conductor crimping portion 232 ⁇ / b> U. May be.
- the conductor crimping portion 232 including the lower portion 230 u can be made to follow the shape of the receiving groove portion 13 of the female die 11.
- the conductor crimping portion 232 is formed by deforming the conductor crimping portion 232 into which the covered electric wire 100 is inserted into a U-shaped cross section, but is not limited thereto, and a good connection state with the aluminum core wire 101 in the crimped state.
- An appropriate cross-sectional shape may be used as long as it can be secured.
- the conductor crimping part 232 is crimped with a predetermined crimping die with the aluminum core wire 101 inserted, as shown in FIG. 9A, which is a sectional view of another crimping state in the conductor crimping part 232,
- the orthogonal cross section in the longitudinal direction X may be formed in a substantially cross-shaped cross section in the crimped state.
- the cross-shaped conductor crimping portion 232X includes four concave groove portions 237a that are recessed toward the center in the width direction Y of the aluminum core wire 101, and four protruding in the vertical direction and the width direction Y by the concave groove portion 237a. It is comprised with the protrusion part 237b.
- processing of a portion corresponding to the protruding portion 237b or the concave groove portion 237a in the circumferential direction of the conductor crimping portion 232 is accompanied by compression of the conductor crimping portion 232 before crimping.
- the rate plastic deformation amount
- the cross-shaped conductor crimping portion 232X has the protruding portion 237b or the concave groove portion 237a on both sides in the width direction Y of the conductor crimping portion 232 before crimping with respect to the welded portion 230b or the welded portion 230b. It is formed in a symmetrical shape so as to be located at
- the welded portion 230b so as to be positioned at the top of the protruding portion 237b or the recessed groove portion 237a.
- FIG. 9B which is a cross-sectional view of another crimping state in the conductor crimping portion 232
- the conductor crimping portion 232 into which the aluminum core wire 101 is inserted is crimped with a predetermined crimping die, and in the crimped state.
- the conductor crimping part 232Y may be formed so that the cross-sectional shape in the longitudinal direction X is substantially Y-shaped in cross section.
- the Y-shaped conductor crimping portion 232Y has three groove portions 238a that are recessed toward the center in the width direction Y of the aluminum core wire 101, and a protrusion that protrudes downward and obliquely upward by the groove portion 238a. Part 238b.
- the Y-shaped conductor crimping portion 232Y is configured such that the welded portion 230b is positioned at the top of the protruding portion 238b or the recessed groove portion 238a.
- compression-bonding part 232X can be show
- the conductor crimping portion 232Y has a configuration including a plurality of protruding portions 238b and a recessed groove portion 238a, but in the above-described crimped state, the conductor crimping portion 232Y can exhibit an annealing effect in the same manner as the cross-shaped conductor crimping portion 232X.
- the orthogonal cross section can be surely plastically deformed into a Y shape without cracking.
- FIG. 10 which is a sectional view of another crimped state in the conductor crimping portion 232
- the conductor crimping portion 232 with the aluminum core wire 101 inserted is crimped by a predetermined crimping die, and the conductor crimping portion in the crimped state.
- 232H may be formed such that the cross-sectional shape in the longitudinal direction X has a substantially H-shaped cross section.
- the H-shaped conductor crimping portion 232H has a shape in which both outer portions of the intermediate portion in the width direction protrude in the vertical direction, and forms a welded portion on the upper portion of the intermediate portion in the width direction. Both sides of the intermediate part are formed symmetrically.
- the conductor pressure-bonding portion 232H has protruding portions 239b protruding in the upper and lower sides at both outer and intermediate portions in the width direction, and a concave groove portion 239a at the intermediate portion in the width direction.
- the conductor crimping part 232H has a configuration including a plurality of protruding parts 239b and a concave groove part 239a, but in the above-described crimped state, an annealing effect can be achieved similarly to the cross-shaped conductor crimping part 232X.
- the orthogonal cross section can be surely plastically deformed into an H shape without cracking.
- the conductor of the present invention corresponds to the aluminum core wire 101 of the embodiment
- the insulating coating corresponds to the insulating coating 102
- the conductor tip corresponds to the exposed aluminum core wire 101
- the crimping part corresponds to the barrel part 230
- the crimping part before crimping corresponds to the conductor crimping part 232
- the butt end corresponds to the end 230a
- Plastic deformation locations are the upper surface concave portion 234a, the protruding portion 234T, the lower portion 230u of the U-shaped crimping portion 234, the protruding portion 237b, the recessed groove portion 237a, the protruding portion 238b, the recessed groove portion 238a, the protruding portion 239b, and the recessed groove portion 239a.
- the crimped part after crimping corresponds to a U-shaped conductor crimping part 232U, a cross-shaped conductor crimping part 232X, a Y-shaped conductor crimping part 232Y, and an H-shaped conductor crimping part 232H in the crimped state
- the connection structure corresponds to the crimp connection structure 1
- the coating tip corresponds to the vicinity of the tip of the insulating coating 102,
- the present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.
- the annealing effect of the above-described crimp terminal 200 is that the conductor crimping portion 232 is compressed and deformed, and the conductor crimping portion 232 is crimped to the aluminum core wire 101 in the crimping step, and the barrel portion 230 has a large working rate (plastic deformation amount).
- the present invention is not limited to the case where the workability is improved at a location where the deformation is forced.
- such an annealing effect of the crimp terminal 200 is not limited to the application of heat to the welded portion W of the barrel portion 230 during welding in the welding process, and may be performed in other processes other than the welding process, such as a fiber laser. It can obtain by applying heat to places other than welding location W in crimp terminal 200 by heat application means other than welding means, without being limited to welding means such as welding device FL.
- the barrel portion 230 when forming the barrel portion 230, when bending a copper alloy strip punched into a terminal shape in a punching process with a high processing rate (plastic deformation amount), the bending and annealing are performed. By repeating the application of heat, even the crimp terminal 200 having a complicated terminal shape can be accurately and easily created.
- the crimp terminal 200 is not limited to the barrel portion 230 formed in a cylindrical body having the same diameter along the longitudinal direction X (front-rear direction X), but as shown in FIG. It may be formed in a step shape so that the diameter is different.
- FIG. 11 has shown the perspective view of the crimp terminal 200 in other embodiment.
- the barrel portion 230 is integrally formed of a conductor crimping portion 232, a stepped portion 230d, and a covering crimping portion 231.
- the tip end side of the covered wire 100 is set to the wire tip end portion 100T
- the exposed portion of the aluminum core wire 101 is set to the core wire tip end portion 101T on the tip end side of the wire tip end portion 100T.
- the insulation coating 102 on the rear side of the core wire tip portion 101T in the portion 100T is set to the coating tip portion 102T.
- the conductor crimping portion 232 is a portion corresponding to the inserted core wire tip portion 101T in the longitudinal direction X in a state where the wire tip portion 100T is inserted, and is substantially equal to or slightly equal to the outer diameter of the core wire tip portion 101T. It has a large inner diameter and is smaller than the coated crimping portion 231.
- the covering crimping portion 231 is a portion corresponding to the inserted covering tip portion 102T in the longitudinal direction X in the state where the wire tip portion 100T is inserted, and is substantially equal to or slightly equal to the outer diameter of the covering tip portion 102T. It has a large inner diameter.
- the stepped portion 230d is not a stepped shape orthogonal to the longitudinal direction X, but is formed in a stepped shape that is slidably reduced in diameter from the coated crimped portion 231 to the conductor crimped portion 232.
- the conductor crimp portion 232 is connected to the core wire tip portion 101T as compared with the conductor crimp portion in the conventional barrel portion not formed in the step shape. Since the gap becomes small, it is possible to suppress the amount of compression to the inner side in the radial direction when crimping and connecting to the core wire tip 101T, and it is possible to prevent the occurrence of surplus. Therefore, since the coated crimping portion 231 can be firmly adhered to the coated distal end portion 102T, excellent water stoppage inside the barrel portion 230 can be ensured. Furthermore, since the conductor crimping portion 232 can be brought into close contact with the core wire tip portion 101T, variations in electrical characteristics can be suppressed, and excellent electrical characteristics can be obtained.
- a conventional barrel portion that is not formed in a step shape has a larger gap between the conductor crimp portion and the core tip portion 101T than the barrel portion 230 of the present embodiment formed in a step shape.
- the portion is crimped and connected to the core wire tip portion 101T, the amount of deformation inward in the radial direction increases.
- the conventional conductor crimping portion 2320 has a so-called inwardly-turned portion in which a surplus occurs when crimped and connected to the core wire tip portion 101 ⁇ / b> T, and the surplus surpasses so as to project radially inward. 2310z is produced.
- the inner tilting portion 2310z becomes an obstacle to the corner of the inner space of the conductor crimping portion 2320. There was a possibility that the aluminum core wire 101 would not spread and the electrical characteristics would vary.
- the barrel portion 230 of the present embodiment formed in a stepped shape is more than the barrel portion 2300 not formed in a stepped shape as described above.
- the gap between the conductor crimping portion 232 and the core wire tip portion 101T can be reduced.
- the conductor crimping part 232 and the core wire tip part 101T are brought into close contact with each other without causing the inner crimping part 2310z, which is difficult to control the shape during compression, to the conductor crimping part 232 even when crimped and connected to the core wire tip part 101T. Therefore, the electrical characteristics can be prevented from being varied and excellent electrical characteristics can be obtained.
- the barrel 230 has a conductor crimping portion in both cases where the conductor crimping portion 232 and the covering crimping portion 231 are formed with substantially the same diameter, and when the barrel crimping portion 232 is formed in a stepped manner at the boundary between each other via the step portion 230d.
- the rear opening end may be inclined.
- FIG. 13A which illustrates an explanatory diagram for explaining the barrel portion 230 of another crimp terminal 200
- the crimp terminal 200 has an upper portion of the opening end portion of the barrel portion 230 at the rear side in a side view. You may incline and form toward.
- the barrel part 230 in the crimped state can crimp the covered electric wire 100 in a crimped state with good appearance.
- the barrel portion 230 has a crimped blade shape, a crimping of the conductor crimping portion 232, and a crimping of the covering crimping portion 231 so that the open end of the barrel portion 230 after crimping is substantially vertical in a side view.
- the opening end on the rear side may be inclined forward or backward.
- the covered electric wire 100 connected to the above-described crimp terminal 200 is not limited to covering the aluminum-based conductor made of aluminum or aluminum alloy with the insulating coating 102, but, for example, a copper-based wire made of copper or copper alloy
- the conductor may be covered with an insulating coating 102.
- the conductor may be a heterogeneous mixed conductor in which aluminum strands are arranged and bundled around a copper strand, or conversely, a copper strand around an aluminum strand. It may be a heterogeneous mixed conductor or the like arranged and bundled.
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Abstract
Description
これらコネクタは、被覆電線に圧着して接続した圧着端子が内部に装着されており、凹凸対応して接続される雌型コネクタと雄型コネクタとを嵌合させる構成である。
例えば、特許文献1に記載に開示の導電部材もこのような圧着端子の一つである。特許文献1に開示の「導電部材」は、他の部材に接続される接続面が設けられた基材である締結部と、該締結部に対して突出され、電線の先端部分を締結する電線接続部とで構成している。
前記塑性変形箇所とは、圧着部の周方向において、変形量が最も大きくなる箇所に限らず、圧着部の周方向において、変形量が周辺部分と比較して局所的に大きくなる箇所であればよい。
そうすると、加工硬化した塑性変形箇所が圧着部と導体先端部とを圧着する際に塑性変形することにより、特に、塑性変形箇所に割れが生じるおそれがあった。
これに対して、圧着部における突合せ端部を溶着することで、圧着部は、溶接部を中心にして周方向において溶接に伴う熱によって焼きなましされる。このため、圧着部は、溶接部に対応する箇所だけでなく、溶接部以外の非溶接箇所も含めて曲げ加工等、圧着前の加工に伴い生じていた加工硬化による歪(転位)を除去することができる。
よって前記圧着部を前記導体先端部に圧着する際に、塑性変形箇所を確実に塑性変形させることができる。
従って、導体先端部に対して圧着部を隙間なくしっかりと密着した状態で圧着することができるため、優れた止水性、及び導通性を得ることができる。
この発明によれば、隙間の無い圧着部を構成し、圧着状態において圧着部の内部に水分が侵入することを確実に防止できる圧着端子を製造することができる。詳しくは、ファイバーレーザは他の溶接用レーザと比べ、焦点を極小なスポットに合わせることができ、高出力なレーザ溶接を実現することができるとともに、連続照射可能である。
従って、導体先端部に対して圧着部を隙間なくしっかりと密着した状態で圧着することができるため、優れた止水性、及び導通性を得ることができる。
まず、本実施形態における圧着接続構造体1について、図1から図3を用いて詳しく説明する。
なお、図1は圧着接続構造体1を説明する説明図を示し、図2は図1中のA-A矢視断面図を示し、図3はバレル部230における溶接について説明する説明図を示している。
被覆電線100は、図1(b)に示すように、アルミニウム素線101aを束ねたアルミニウム芯線101を、絶縁樹脂で構成する絶縁被覆体102で被覆して構成している。さらに、被覆電線100は、絶縁被覆体102の先端から所定の長さアルミニウム芯線101を露出させている。
より詳しくは、バレル部230は、図3に示すように、端子形状に打ち抜いた銅合金条を被覆電線100の外径より僅かに大きい内径で被覆電線100の外周を包囲するように丸めるとともに、圧着端子200のバレル230に相当するバレル相当箇所において丸めた端部230a同士を突き合わせて長手方向Xの溶接箇所Wに沿って溶接して後方視略O型の閉断面形状に形成している。
圧着状態においてO字状の被覆圧着部231Oは、被覆電線100が挿入された被覆圧着部231を所定の圧着金型で断面略O字状に変形させて、絶縁被覆体102を圧着した圧着状態を構成している。
圧着状態においてU字状の導体圧着部232Uは、図2に示すように、被覆電線100が挿入された導体圧着部232を後述する一対の雌雄金型10で変形させて、アルミニウム芯線101を圧着した圧着状態において断面略U字状に構成している。
すなわち、圧着状態においてU字状の導体圧着部232Uは、長手方向Xに対して直交する直交断面を略U字状に形成している。
なお、図4はバレル部230におけるビッカース硬さを説明する説明図であり、詳しくは、図4(a)はバレル部230におけるビッカース硬さの測定箇所を示し、図4(b)は測定箇所P5に対する各測定箇所のビッカース硬さの割合を示している。
なお、測定点P5は、導体圧着部232の周方向において、ファイバーレーザ溶接を行う対象である突合わせ端部230aから最も離間しているため、熱が伝導し難く、焼きなまし効果を得ることが困難な箇所であるため、ファイバーレーザ溶接を行う前の導体圧着部232とビッカーズ硬さが略同じ値となる箇所である。
なお、図5は導体圧着部232における圧着工程を説明する説明図を示し、図5(a)は導体圧着部232の圧着前の状態を示し、図5(b)は導体圧着部232を圧着してU字状の導体圧着部232Uを構成した状態を示している。
メス金型11は、幅方向Yにおける断面において、導体圧着部232の外径に対して僅かに小さい直径で略U字状に形成した受け溝部13によって略逆門型形状に形成している。
このため、圧着端子200のバレル部230をアルミニウム芯線101に圧着するに伴って、導体圧着部232の周方向において、特に、突出部234Tに相当する箇所を、周辺部分と比較して、局所的な変位量で変形させても、突出部234Tには、圧着割れが生じることがなく、しっかりと圧着刃型への追従した状態で圧着することができる。
また、圧着端子200をメス型の圧着端子としたが、これに限定せず、メス型の圧着端子に対して長手方向Xに嵌合するオス型の圧着端子であってもよい。あるいは、ボックス部210ではなく略U字状あるいは環状の平板などであってもよい。さらにまた、アルミニウム芯線101は、複数の素線としてのアルミニウム合金線を束ねた単線に限らず、複数のアルミニウム合金線を撚った撚り線として構成してもよい。
また、バレル部230の先端に封止部235を形成したが、これに限定せず、バレル部230の先端を別部材でシールしてもよい。
この際、導体圧着部232と被覆圧着部231とを同時に圧着することで、導体圧着部232と被覆圧着部231との境界部分などは段差が生じるなど大きな圧縮変形(塑性変形)を強いられることになる。
従って、被覆電線100にバレル部230を隙間なくしっかりと密着した状態で圧着することができるため、優れた止水性、及び導通性を得ることができる。
これにより、上述した圧着状態において十字状の導体圧着部232Xと同様の焼きなまし効果を奏することができる。
この発明の導体は、実施形態のアルミニウム芯線101に対応し、
以下同様に、
絶縁被覆は、絶縁被覆体102に対応し、
導体先端部は、露出したアルミニウム芯線101に対応し、
圧着部は、バレル部230に対応し、
圧着する前の圧着部は、導体圧着部232に対応し、
突合せ端部は、端部230aに対応し、
塑性変形箇所は、上面凹状部234a、突出部234T、U字状圧着部234の下方部分230u、突出部237b、凹溝部237a、突出部238b、凹溝部238a、突出部239b、及び凹溝部239aに対応し、
圧着後の圧着部は、圧着状態において、U字状の導体圧着部232U、十字状の導体圧着部232X、Y字状の導体圧着部232Y、及びH字状の導体圧着部232Hに対応し、
接続構造体は、圧着接続構造体1に対応し、
被覆先端部は、絶縁被覆体102の先端近傍に対応するが、
この発明は、上述の実施形態の構成のみに限定されるものではなく、多くの実施の形態を得ることができる。
なお、以下の説明において、被覆電線100の先端側を電線先端部100Tに設定し、さらに、電線先端部100Tの先端側でアルミニウム芯線101の露出部分を芯線先端部101Tに設定するとともに、電線先端部100Tにおける芯線先端部101Tよりも後方側の絶縁被覆102を被覆先端部102Tに設定する。
従って、被覆圧着部231を被覆先端部102Tにしっかりと密着させることができるため、バレル部230内部の優れた止水性を確保できる。さらに、導体圧着部232を芯線先端部101Tに密着させることができるため、電気的特性のばらつきを抑制し、優れた電気的特性を得ることができる。
100…被覆電線
101…アルミニウム芯線
102…絶縁被覆体
200…圧着端子
230…バレル部
230a…端部
230b…溶接部
232…導体圧着部
232U…圧着状態においてU字状の導体圧着部
234a…上面凹状部
234T、…突出部
232X…圧着状態において十字状の導体圧着部
237a…凹溝部
237b…突出部
232Y…圧着状態においてY字状の導体圧着部
238a…凹溝部
238b…突出部
232H…圧着状態においてH字状の導体圧着部
239a…凹溝部
239b…突出部
X…長手方向
Claims (14)
- 導体を絶縁被覆で被覆し、少なくとも先端側の前記絶縁被覆を剥がして前記導体を露出させた導体先端部を備えた被覆電線における少なくとも前記導体先端部の圧着接続を許容する圧着部を備えた圧着端子であって、
前記圧着部を、
端子展開形状の端子基材の圧着部相当箇所を端子軸回りに曲げて筒状に形成するとともに、前記圧着部相当箇所が突き合わさる突合せ端部に、該突合せ端部を溶接した溶接部を前記圧着部の長手方向に沿って形成し、
前記圧着部の前記導体先端部に対する圧着に伴って前記圧着部が塑性変形する変形量が該圧着部の周方向における周辺部分と比較して大きくなる箇所を、塑性変形箇所に設定し、
前記溶接部を前記塑性変形箇所に形成した
圧着端子。 - 前記圧着部を、長手方向に直交する直交断面において、該圧着部の直交断面の中心部と前記溶接部とを直線状に結ぶ仮想軸線の両側が対称形状になるように形成し、
前記圧着部の周方向における前記仮想軸線の両側に、前記塑性変形箇所を形成した
請求項1に記載の圧着端子。 - 前記圧着部が塑性変形する変形量を、前記圧着部が塑性変形するに伴って変位する変位量に設定し、
前記溶接部を形成した前記塑性変形箇所を、前記変位量が周辺部分と比較して大きくなる塑性変位箇所として形成した
請求項2に記載の圧着端子。 - 前記圧着部が塑性変形する変形量を、前記圧着部が塑性変形するに伴って曲げ変形する曲げ変形量に設定し、
前記圧着部の周方向における前記仮想軸線の両側に形成した前記塑性変形箇所を、前記曲げ変形量が周辺部分と比較して大きくなる塑性曲げ変形箇所として形成した
請求項2または3に記載の圧着端子。 - 前記圧着部を、
圧着後の前記圧着部の直交断面が、Uの字形状となる直交断面に形成した
請求項4に記載の圧着端子。 - 前記圧着部を、
圧着後の前記圧着部の直交断面が、Hの字形状となる直交断面に形成した
請求項4に記載の圧着端子。 - 前記圧着部が塑性変形する変形量を、前記圧着部が塑性変形するに伴って曲げ変形する曲げ変形量に設定し、
前記溶接部に形成した前記塑性変形箇所を、前記曲げ変形量が周辺部分と比較して大きくなる塑性曲げ変形箇所として形成した
請求項2に記載の圧着端子。 - 前記圧着部を、
圧着後の前記圧着部の直交断面が、上下左右に前記突出部を有する十字形状となる直交断面に形成した
請求項7に記載の圧着端子。 - 前記仮想軸線を、
前記圧着部の幅方向の中間部分に設定した
請求項2から8のいずれか一項に記載の圧着端子。 - 導体を絶縁被覆で被覆した被覆電線における先端側の前記絶縁被覆を所定の長さ分剥がして前記導体を露出させた導体先端部の圧着接続を許容する圧着部を備えた圧着端子における前記圧着部によって前記被覆電線と前記圧着端子とを圧着接続した接続構造体であって、
前記圧着端子を、請求項1から9のいずれか一項に記載の圧着端子で構成し、
前記圧着部と前記被覆電線の少なくとも前記導体先端部とを圧着した
接続構造体。 - 請求項10に記載の圧着接続構造体を複数備えるとともに、前記接続構造体における前記圧着端子を収容可能なコネクタハウジングを備え、
前記圧着端子をコネクタハウジング内に配置した
ワイヤーハーネス。 - 基材を端子展開形状に打ち抜いて端子基材を形成する打ち抜き工程と、
前記端子基材の圧着部相当箇所を端子軸回りに曲げて筒状に形成する曲げ工程と、
前記圧着部相当箇所が周方向において突き合わさる突合せ端部に、該突合せ端部を溶接した溶接部を溶接した溶接部を長手方向に沿って形成する溶接工程とをこの順に行う圧着端子の製造方法によって、筒状の圧着部を備えた圧着端子を構成し、
導体を絶縁被覆で被覆した被覆電線における先端側の前記絶縁被覆を所定の長さ分剥がして前記導体を露出させた少なくとも導体先端部を圧着前の前記圧着部に挿入する電線挿入工程と、
前記圧着部を少なくとも前記導体先端部に圧着する圧着工程とをこの順に行い前記圧着端子と前記被覆電線とを圧着接続する接続構造体の製造方法であって、
前記圧着工程によって前記圧着部の前記導体先端部に対する圧着に伴って前記圧着部が塑性変形する変形量が該圧着部の周方向における他の部分と比較して大きくなる塑性変形箇所に、前記圧着部相当箇所の前記突合せ端部が配置されるように、前記曲げ工程において、前記圧着部相当箇所を曲げ加工することを特徴とする
接続構造体の製造方法。 - 前記溶接工程において前記突合せ端部の溶接をファイバーレーザ溶接で行う
請求項12に記載の接続構造体の製造方法。 - 前記圧着部を、
前記導体先端部を圧着する導体圧着部と、電線先端側における前記導体先端部よりも基端側の被覆先端部を圧着する被覆圧着部とで構成し、
前記圧着工程において、前記導体圧着部と前記被覆圧着部とを同時に圧着する
請求項12または13に記載の接続構造体の製造方法。
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| EP2961010B8 (en) * | 2013-02-22 | 2018-05-23 | Furukawa Electric Co., Ltd. | Method for manufacturing crimp terminal, crimp terminal, and wire harness |
| CN105009386B (zh) * | 2013-02-23 | 2017-11-28 | 古河电气工业株式会社 | 连接结构体的制造方法、连接结构体、线束、压接部件和压接装置 |
| CN105009383B (zh) * | 2013-02-23 | 2017-09-01 | 古河电气工业株式会社 | 连接构造体、端子压接部件、线束、连接器、连接构造体的压接方法、以及压接该连接构造体的压接装置 |
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| JP6039486B2 (ja) * | 2013-04-03 | 2016-12-07 | 矢崎総業株式会社 | 端子の接続構造及び端子の接続方法 |
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- 2014-01-15 KR KR1020147031222A patent/KR101488468B1/ko active Active
- 2014-01-15 EP EP14754934.9A patent/EP2960994B1/en active Active
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| EP2793312A4 (en) * | 2012-07-27 | 2015-06-03 | Furukawa Electric Co Ltd | CONNECTION, METHOD FOR PRODUCING A CONNECTION AND WIRE CONNECTING STRUCTURE |
| US9246292B2 (en) | 2012-07-27 | 2016-01-26 | Furukawa Electric Co., Ltd. | Terminal, method of manufacturing terminal, and termination connection structure of electric wire |
| US9768525B2 (en) | 2012-07-27 | 2017-09-19 | Furukawa Electric Co., Ltd. | Terminal, method of manufacturing terminal, and termination connection structure of electric wire |
| RU2576463C1 (ru) * | 2015-01-20 | 2016-03-10 | Дмитрий Анатольевич Семаков | Соединительная клемма для электрических проводов |
| RU172697U1 (ru) * | 2017-04-12 | 2017-07-19 | Общество с ограниченной ответственностью "ПЛП РУС" | Соединительный зажим для соединения фазных проводов в шлейфах воздушных линий электропередач |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104350644A (zh) | 2015-02-11 |
| EP2960994B1 (en) | 2018-05-30 |
| KR20140134344A (ko) | 2014-11-21 |
| US20150333416A1 (en) | 2015-11-19 |
| EP2960994A4 (en) | 2017-02-22 |
| EP2960994A1 (en) | 2015-12-30 |
| JP5546708B1 (ja) | 2014-07-09 |
| KR101488468B1 (ko) | 2015-01-30 |
| US9531088B2 (en) | 2016-12-27 |
| CN104350644B (zh) | 2016-04-20 |
| JPWO2014129234A1 (ja) | 2017-02-02 |
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