JP2019083155A - Terminal-equipped electric wire manufacturing method and manufacturing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an electric wire with a terminal capable of accurately forming a single wire bundle formed by ultrasonic bonding regardless of the thickness of the electric wire bundle. SOLUTION: This manufacturing method is a manufacturing method of an electric wire 1 with a terminal in which a terminal 20 is crimped to an electric wire 10 having a core wire bundle 13 in which a plurality of conductor core wires 12 are bundled, and the temperature is adjusted with respect to the core wire bundle 13. The first step of preliminarily adjusting the temperature of the core wire bundle so that the core wire bundle has a predetermined target temperature by applying the treatment, and the ultrasonic bonding treatment of the core wire bundle that has undergone the preparatory temperature control causes the plurality of conductor core wires 12 to be formed. The second step of forming the joint core wire 13A joined to each other and the third step of crimping the terminal 20 to the joint core wire 13A are included. [Selection diagram] Fig. 1

Description

  The present invention relates to a method for manufacturing a terminal-equipped wire in which a terminal is crimped to a wire having a core wire bundle in which a plurality of conductor core wires are bundled, and a manufacturing system for manufacturing such a terminal-equipped wire.

  BACKGROUND ART Conventionally, a wire having a core wire bundle (e.g., a stranded wire) in which a plurality of conductor core wires are bundled has been proposed from the viewpoint of improving bending strength while increasing the allowable current of the wire. When a terminal is crimped to such a core wire bundle (twisted wire), the conductor core wire located at the outer peripheral portion of the core wire bundle is directly connected to the terminal and electrically connected, but is located at the central portion of the core wire bundle The conductor core wire is electrically connected to the terminal through the conductor located at the outer peripheral portion. Therefore, in order to improve the overall conductivity between the core wire bundle and the terminal, in addition to the conductivity between the conductor core wire and the terminal (the conductivity of the outer peripheral portion), the conductivity between the conductor core wires is It is desirable to improve (the conductivity of the central portion).

  On the other hand, in recent years, aluminum, an aluminum alloy, etc. may be used as a material of a conductor core wire, since it is lightweight and low cost etc. compared with copper. However, in this case, since the insulation of the oxide film (aluminum oxide) naturally formed on the surface of the conductor core wire is high, various kinds of the above-mentioned conductivity (conductivity of the outer peripheral portion and conductivity of the central portion) are improved. Devices are required.

  For example, in one of the conventional methods of manufacturing a terminal-attached electric wire (hereinafter referred to as "conventional manufacturing method"), the conductor is subjected to ultrasonic bonding treatment to a core wire bundle (twisted wire) made of an aluminum conductor core wire. The conductor core wires are joined to each other while breaking the oxide film on the surface of the core wire, and the core wire bundle is integrated (unified). Thereby, the conductor core wire located in the outer peripheral part of a core wire bundle and the conductor core wire located in a center part will contact a terminal substantially directly. As a result, since the conductivity of the central portion is improved, the overall conductivity between the core wire bundle and the terminal can be improved as compared with the case where such single wires are not made (for example, patent document) 1 to 3).

JP, 2016-115525, A JP, 2011-082127, A JP, 2009-231079, A

  According to experiments conducted by the inventors, when the core wire bundle is actually integrated (made into a single wire) by the conventional manufacturing method, ultrasonic bonding is performed as the thickness of the core wire bundle increases (in a so-called heavy electric wire) It has become clear that the dimensional accuracy of the single-cored core wire bundle after application tends to decrease. In other words, it was revealed that the thicker the core wire bundle, the greater the variation in the shape of the single-wireed core wire bundle. In addition, this variation is the temperature environment resulting from the area and the season etc. which perform the processing which performs single-wire-izing, individual differences in the degree of twist and winding of core wire bundle (conductor core wire) before single-wire-izing, and thick core wire bundle. It is considered that this is because the spring back (the repulsive force to the pressing force in the ultrasonic bonding process) is increased.

  From the viewpoint of improving the connection reliability between the wires and the terminals, it is desirable that the variation in the shape of the core wire bundle after single wire formation be as small as possible.

  The present invention has been made in view of the above-described circumstances, and an object thereof is a terminal-attached electric wire capable of accurately forming a single core wire bundle by ultrasonic bonding regardless of the thickness of the core wire bundle. It is to provide a manufacturing method and a manufacturing system of

In order to achieve the objective mentioned above, "the manufacturing method of the electric wire with a terminal" concerning the present invention is characterized by following (1)-(3).
(1)
It is a manufacturing method of the electric wire with a terminal by which the terminal was crimped to the electric wire which has a core wire bundle with which a plurality of conductor core wires were bundled,
A first step of performing temperature adjustment so that the core wire bundle has a predetermined target temperature by performing a temperature adjustment process on the core wire bundle;
A second step of forming a bonding core wire in which the plurality of conductor core wires are bonded to each other by subjecting the core wire bundle subjected to the preliminary temperature adjustment to ultrasonic bonding treatment;
And a third step of crimping the terminal to the bonding core wire.
It is a manufacturing method of the electric wire with a terminal.
(2)
In the manufacturing method according to the above (1),
The temperature adjustment process
A first process for holding the core wire bundle in a chamber having a temperature controller corresponding to the target temperature, and a temperature of an indenter for performing the ultrasonic bonding process are adjusted according to the target temperature, and Performed by at least one of a second process of bringing an indenter into contact with the core wire bundle;
It is a manufacturing method of the electric wire with a terminal.
(3)
In the manufacturing method according to the above (1) or (2),
The plurality of conductor cores are
Formed of aluminum or aluminum alloy,
It is a manufacturing method of the electric wire with a terminal.

  According to the method of manufacturing a terminal-attached electric wire of the configuration (1), the core wire bundle is subjected to the preliminary temperature adjustment before the ultrasonic bonding process is performed on the core wire bundle of the electric wire. According to experiments conducted by the inventor, if the temperature of the core wire bundle is adjusted to the temperature suitable for ultrasonic bonding (predetermined target temperature) by this preliminary temperature control, compared to the case where the preliminary temperature control is not performed, It became clear that the variation in the shape of the core wire bundle (after being made single by ultrasonic bonding) could be reduced. In other words, it has become clear that the core wire bundle can be made into a single wire with high accuracy by appropriately performing the preliminary temperature adjustment.

  This is because the temperature of the core wire bundle is determined by the temperature adjustment process even if the temperature of the core wire bundle is different depending on the environment (for example, the difference in air temperature due to the difference in season, the difference in air temperature due to the difference in area, etc.) If the temperature is preliminarily adjusted so as to have the target temperature, variation in the energy actually supplied to bonding among the energy externally applied to the core wire bundle during the ultrasonic bonding process (for example, the temperature of the core wire bundle is This is considered to be due to the fact that the variation (due to the energy consumed for the temperature rise of the core wire bundle) is reduced when the temperature is lower than the target temperature.

  Therefore, according to the manufacturing method of this configuration, regardless of the thickness of the core wire bundle of the electric wire, it is possible to single wire the core wire bundle with high accuracy by the ultrasonic bonding process.

  The above-described preliminary temperature control includes heating or cooling so that the temperature of the core wire bundle becomes a target temperature, or intentionally not performing either heating or cooling if neither is required. In addition, if the target temperature described above is determined based on the thickness and material of the conductor core wire, the number of conductor core wires included in the core wire bundle, the dimensional accuracy required for the bonding core wire, the heat resistance temperature of the conductor core wire, etc. Good. Moreover, when performing pre-temperature-control by cooling, it is preferable to dehumidify so that dew condensation may not arise in a core wire bundle.

  According to the method of manufacturing the terminal-equipped electric wire of the configuration of (2), a method of holding the core wire bundle in a cabinet having a temperature controller (for example, a heater, a cooler, etc.) as a method of preheating the core wire bundle First process) and / or at least one of methods (second process) of adjusting the temperature of an indenter (for example, ultrasonically vibrating horn) for performing ultrasonic bonding process and bringing the indenter into contact with the core wire bundle Will be adopted. By these methods, for example, preheating of the core wire bundle can be performed without requiring an excessive design change in the factory equipment.

  According to the method of manufacturing the terminal-equipped electric wire of the configuration of (3), the insulating film of the oxide film formed on the surface has a larger insulation property than that of a commonly used copper conductor core wire (copper wire) In using a conductor core wire (aluminum wire), the effect (improvement of connection reliability between a wire and a terminal) can be obtained by the above-described high precision single wire forming.

In order to achieve the above-mentioned object, the "production system for a terminal-equipped wire" according to the present invention is characterized by the following (4).
(4)
A manufacturing system of a terminal-attached electric wire in which a terminal is crimped to an electric wire having a core wire bundle in which a plurality of conductor core wires are bundled,
A temperature adjustment unit that performs temperature adjustment so that the core wire bundle has a predetermined target temperature by performing a temperature adjustment process on the core wire bundle;
An ultrasonic bonding portion forming a bonding core wire in which the plurality of conductor core wires are bonded to each other by performing ultrasonic bonding processing on the core wire bundle after the preliminary temperature adjustment;
And a terminal crimping portion for crimping the terminal to the bonding core wire,
It is a manufacturing system of terminal-equipped electric wire.

  According to the manufacturing system of the terminal-attached electric wire of the configuration of (4), the preliminary adjustment of temperature is performed on the core wire bundle before the ultrasonic bonding process is performed on the core wire bundle of the electric wire. According to experiments conducted by the inventor, if the temperature of the core wire bundle is adjusted to the temperature suitable for ultrasonic bonding (predetermined target temperature) by this preliminary temperature control, compared to the case where the preliminary temperature control is not performed, It became clear that the variation in the shape of the core wire bundle (after being made single by ultrasonic bonding) could be reduced. In other words, it has become clear that the core wire bundle can be made into a single wire with high accuracy by appropriately performing the preliminary temperature adjustment.

  Therefore, in the manufacturing system of this configuration, it is possible to single-wire the core wire bundle with high accuracy by the ultrasonic bonding process regardless of the thickness of the core wire bundle of the electric wire.

  According to the present invention, it is possible to provide a method and a system for manufacturing a terminal-equipped wire capable of accurately forming a single core wire bundle by ultrasonic bonding regardless of the thickness of the core wire bundle of the wire.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the modes for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached drawings.

FIG. 1 is a view for explaining the outline of the process (preliminary temperature control and ultrasonic bonding) prior to the terminal crimping process in the method of manufacturing a terminal-attached electric wire according to an embodiment of the present invention, and FIG. Each of FIG. 1 (c) is a perspective view of the end of the wire. FIG. 2 is a view for explaining an outline of a terminal crimping step in a method of manufacturing a terminal-attached electric wire according to an embodiment of the present invention, wherein each of FIG. 2 (a) and FIG. 2 (b) FIG. FIG. 3 is a view for explaining the transition of the shape of the core wire bundle of the electric wire, and FIG. 3 (a) is a front view of the core wire bundle (bonded core wire) subjected to ultrasonic bonding; FIG. 3 (b) is a bonded It is a figure explaining the shape of a core wire. FIG. 4 is a schematic view of an ultrasonic bonding apparatus for ultrasonically bonding a core wire bundle. FIG. 5 is a perspective view of a terminal crimping device for crimping a terminal to a wire, a wire and the like. FIG. 6 is a graph showing the influence of the presence or absence of pre-temperature control on the variation in the width of the core wire bundle after single-wire processing. FIG. 7 is a schematic view of an ultrasonic bonding apparatus for ultrasonically bonding a core wire bundle in the method of manufacturing a terminal-attached electric wire according to another embodiment of the present invention.

  Hereinafter, the manufacturing method and manufacturing system of the electric wire with a terminal concerning the embodiment of the present invention are explained, referring to drawings.

<Overview>
First, I will give an overview. When the terminal 20 is crimped to the electric wire 10, ultrasonic bonding is performed by the ultrasonic bonding apparatus 30 from the viewpoint of conductivity improvement, etc., and the crimping process of the terminal 20 by the terminal crimping apparatus (anvil 40 and crimper 50) is performed. It will be. However, in the embodiment of the present invention, the preliminary temperature adjustment device 60 performs preliminary temperature adjustment on the core wire bundle 13 of the electric wire 10 before the ultrasonic bonding process. Hereinafter, the configuration and operation of these devices will be described in detail.

  First, as shown in FIG. 1A, in the method of manufacturing a terminal-attached electric wire according to the present embodiment, the insulation coating 11 of the electric wire 10 is peeled off to expose the core wire bundle 13 composed of a plurality of conductor core wires 12 . Next, as shown in FIG. 1B, the core wire bundle 13 is subjected to a temperature adjustment process (details will be described later). Next, as shown in FIG. 1 (c), ultrasonic bonding (described in detail later) is performed on the core wire bundle 13 after preliminary temperature adjustment, and a bonded core wire 13A in which adjacent conductor cores 12 are bonded to each other Form

  In addition, as shown to Fig.1 (a), the electric wire 10 is comprised so that the outer periphery of the core wire bundle 13 of the cross-sectional circular shaped with which the several conductor core wire 12 was bundled may be covered with the insulation coating 11. As shown in FIG. In the present example, the conductor core wire 12 is a non-plated wire made of aluminum or aluminum alloy. In other words, the wire 10 is a so-called aluminum wire or aluminum alloy wire.

  Thereafter, as shown in FIG. 2 (a), after the bonding core 13A is disposed at a predetermined position of the terminal 20, as shown in FIG. 2 (b), the terminal 20 is bonded to the bonding core 13A (and the insulation coating 11 around it). Crimp to). The electric wire 1 with a terminal is manufactured through the above-mentioned series of processes.

<Details>
Next, each of the above steps will be described in more detail.

  As shown in FIG. 1 (b), regarding the temperature adjustment process performed before the ultrasonic bonding process, the preliminary temperature control device 60 is configured to be able to accommodate and hold the core wire bundle 13 of the electric wire 10 inside. A cover 61 and a temperature controller 62 capable of adjusting the temperature inside the cover 61 are provided.

  The cover 61 has a function of suppressing the inflow and outflow of heat from the inside of the storage in which the core wire bundle 13 is held. However, the cover 61 does not have to completely isolate the inside of the storage and the outside, and has an opening or the like for facilitating the work of housing the core wire bundle 13 within the range where the heat inflow and outflow can be suppressed. It may be done. Further, a holder or the like (not shown) for holding the core wire bundle 13 at a predetermined position may be provided in the inside of the cover 61.

  The temperature controller 62 has one or both of a heater function for warming the interior of the cover 61 and a cooler function for cooling the interior. As an apparatus which implement | achieves a heater function, a heating wire, an infrared lamp, a halogen lamp, a fan heater etc. are mentioned, for example. Moreover, as an apparatus which implement | achieves a cooler function, the cooler (so-called air-conditioner etc.) of a heat pump type | mold, a Peltier device, etc. are mentioned, for example. The temperature controller 62 provided in the preliminary temperature control device 60 has a heater function and / or a cooler function in consideration of, for example, the area where the manufacturing system according to the present embodiment is operated and the surrounding environment such as seasons. It should just be comprised.

  The temperature controller 62 is configured to adjust the temperature inside the cover 61 so that the temperature of the core wire bundle 13 held in the storage of the cover 61 becomes a predetermined target temperature. The target temperature of the core wire bundle 13 is determined by the thickness and material of the conductor core wire 12, the number of the conductor core wires 12 included in the core wire bundle 13, the dimensional accuracy required for the bonding core wire 13A, and the heat resistance temperature of the conductor core wire 12. It may be determined on the basis of Moreover, when performing preliminary temperature adjustment by cooling using a cooler function, it is preferable to dehumidify the inside of the storage of the cover 61 so that dew condensation does not arise in the core wire bundle 13.

  Next, as shown in FIG. 1 (c) and FIG. 3, regarding the ultrasonic bonding process performed after the temperature adjustment process, the bonding core wire 13A obtained by ultrasonic bonding of the core wire bundle 13 after the preliminary temperature adjustment is orthogonal to its axis. In the cross-sectional view, it has a rectangular shape (a rectangular shape having a width X and a height Y). In the bonding core wire 13A, the plurality of conductor core wires 12 constituting the core wire bundle 13 are bonded to each other by ultrasonic vibration.

  An ultrasonic bonding apparatus 30 that performs such ultrasonic bonding processing will be described with reference to FIG. 4. As shown in FIG. 4, the ultrasonic bonding apparatus 30 includes a horn 31, a fixed side plate 32, a movable slide core 33, and an anvil 34. The horn 31 is ultrasonically vibrated in the front-rear direction of the drawing sheet by an ultrasonic oscillator. On the upper surface of the horn 31 (the surface in contact with the core wire bundle 13), a knurl (not shown) composed of a plurality of convex stripes extending in a direction perpendicular to the vibration direction is formed. It is designed to suppress slippage between In the ultrasonic bonding apparatus 30, a rectangular processing space V defined by the horn 31, the side plate 32, the slide core 33, and the anvil 34 is a bonding process chamber V, and the space is disposed in the bonding process chamber V. The conductor core wires 12 of the core wire bundle 13 after preliminary temperature adjustment are ultrasonically bonded.

  The side plate 32 is disposed on the side of the horn 31. The slide core 33 is disposed at a position facing the side plate 32 on the upper surface of the horn 31 and is movable in a direction toward or away from the side plate 32. In FIG. 4, the slide core 33 moves in the direction indicated by the arrow A in the drawing, and presses the core bundle 13 in this direction.

  The anvil 34 is disposed above the horn 31 and the side plate 32 and can be moved in a direction toward or away from the horn 31 by raising and lowering. In FIG. 4, the anvil 34 moves in the direction indicated by the arrow B in the drawing, and presses the core bundle 13 in this direction.

  The ultrasonic bonding apparatus 30 moves the slide core 33 and the anvil 34 as described above to move the width and height of the bonding processing chamber V (thus, the width X and height of the bonding core 13A to which the core bundle 13 is bonded). Y) can be adjusted. By adjusting the width and height of the bonding processing chamber V in this manner, it is possible to form a bonding core 13A having a desired target shape.

  Next, referring to FIG. 2A again, regarding the crimping process of the bonding core wire 13A and the terminal 20 performed after the end ultrasonic bonding process, the terminal 20 has the electrical connection portion 21 and the crimped connection portion 22. doing. The terminals 20 are formed, for example, by pressing a metal plate made of a conductive metal material such as copper or copper alloy.

  The electrical connection portion 21 has a flat plate-like connection plate portion 23, and a connection hole 23 a is formed in the connection plate portion 23. The connection plate portion 23 is electrically connected to the terminal block, for example, by inserting a fastening bolt into the connection hole 23 a and fastening the connection bolt to a terminal block or the like of the connection device.

  The crimp connection portion 22 has a conductor crimp portion 24 and an outer cover crimp portion 25 in order from the electrical connection portion 21 side. The conductor crimping portion 24 has a base portion 26 and a pair of conductor crimping pieces 27 (crimping pieces) formed on both sides of the base portion 26. Bonding core wire 13 </ b> A is placed on base portion 26. The conductor crimping pieces 27 are extended from the base portion 26 so as to sandwich the bonding core wire 13A. As shown in FIG. 2B, the conductor crimped portion 24 is crimped to the bonding core 13A of the electric wire 10 by curving (clamping) the pair of conductor crimped pieces 27 facing inward. Thus, the terminal 20 is conductively connected to the core wire bundle 13 of the electric wire 10.

  The jacket bonding portion 25 includes a base portion 28 and a pair of jacket bonding pieces 29 formed on both sides of the base portion 28. The base portion 28 of the sheath crimping portion 25 extends from the base portion 26 of the conductor crimping portion 24. The insulating coating 11 of the electric wire 10 is placed on the base portion 28. The jacket bonding piece 29 is extended from the base portion 28 so as to sandwich the insulating coating 11 portion of the electric wire 10. As shown in FIG. 2 (b), the outer jacket crimping portion 25 is crimped to the portion of the insulating coating 11 of the electric wire 10 by curving (squeezing) the pair of outer jacket crimping pieces 29 facing inward and It will be fixed.

  In addition, the crimping process with the joining core wire 13A and the terminal 20 which were mentioned above may be performed using a general terminal crimping device (anvil 40, crimper 50) as shown in FIG. As shown in FIG. 5, the anvil 40 is disposed below the terminal 20 and the joining core 13A, and the crimper 50 is disposed above the terminal 20 and the joining core 13A. The crimper 50 is vertically movable relative to the anvil 40.

  At its top, the anvil 40 has a curved support surface 41 which is recessed downward. When the terminal 20 is crimped, the support surface 41 supports the base 26 of the terminal 20. Specifically, the outer surface of the base portion 26 of the terminal 20 abuts on the support surface 41. The crimper 50 is provided with an arch groove 52 having an angled portion 51 projecting toward the anvil 40 at a central portion in the width direction. The arch groove 52 is composed of two arc surfaces formed on both sides of the angled portion 51. Then, when the crimper 50 is lowered and brought close to the anvil 40, the conductor crimping pieces 27 of the terminals 20 are pressed in a direction approaching each other by the arch groove 52 and deformed so as to curve (roll in) inward, and the bonding core wire 13A Crimping will be done. In the same manner as described above, by lowering the crimper (not shown) with respect to the jacket crimping piece 29, the jacket crimping piece 29 is crimped to the insulating coating 11.

<Evaluation>
The inventor conducted a test to examine the effect of the above-described preliminary temperature control.

  Specifically, samples (normal temperature, about 20 ° C.) not subjected to temperature adjustment and samples (40 ° C. and 70 ° C.) subjected to temperature adjustment were prepared. For these samples, a wire having a core wire bundle diameter of 10.30 mm (50sq) is used. Each sample was subjected to ultrasonic bonding under the conditions of 90% amplitude of the horn 31 of the ultrasonic bonding apparatus 30, 1.75 bar pressurization and 2900 Ws energy.

  The results are shown in FIG. In FIG. 6, the horizontal axis indicates the target temperature of the core wire bundle 13 at the time of preliminary temperature adjustment, and the vertical axis indicates the height Y of the bonding core 13A after the ultrasonic bonding process. As shown in FIG. 6, the height after ultrasonic bonding treatment of the sample subjected to the preliminary temperature control (groups B and C in FIG. 6) compared to the sample not subjected to the preliminary temperature control (group A in FIG. 6) It was confirmed that the variation Y was small (magnitude of variation: a> b> c). Furthermore, it was confirmed that the higher the target temperature at the time of performing the preliminary temperature control, the smaller the variation, and the smaller the height Y after the ultrasonic bonding processing. Although not shown in FIG. 6, it was also confirmed that the time required for ultrasonic bonding becomes shorter as the target temperature at the time of preliminary temperature adjustment is higher.

  This is because the temperature of the core wire bundle 13 is adjusted in advance (in this example, the temperature is raised) to actually perform bonding among the energy given from the horn 31 to the core wire bundle 13 in the ultrasonic bonding process. It is considered that the energy consumed is increased (in other words, the energy consumed for raising the temperature of the core wire bundle 13 is decreased).

  Therefore, even if the temperature of the core wire bundle 13 differs depending on the environment (for example, the difference in air temperature due to the difference in season, the difference in air temperature due to the difference in area, etc.) of the ultrasonic bonding process, the temperature of the core wire bundle 13 is It was revealed that it is possible to single-wire the core wire bundle 13 with high accuracy by the ultrasonic bonding process if the temperature is preliminarily adjusted so as to have a target temperature suitable for the ultrasonic bonding process.

  In addition, even in the test conducted by the inventor under the other conditions (the diameter of the core wire bundle 13, the operating strength of the ultrasonic bonding apparatus 30, the condition in which the degree of preliminary temperature control is different), substantially the same tendency as the main test. Has been confirmed.

<Operation and effect>
As described above, according to the method and system for manufacturing the terminal-equipped electric wire 1 according to the embodiment of the present invention, the preliminary temperature adjustment for the core wire bundle 13 is performed before the ultrasonic bonding process is performed on the core wire bundle 13 of the electric wire 10. Will be applied. If the temperature of the core wire bundle 13 is adjusted to a temperature suitable for the ultrasonic bonding process by this preliminary temperature control, the final (after being made single-wire by the ultrasonic bonding process) as compared with the case where the preliminary temperature control is not performed. It became clear that the dispersion | variation in the shape of 13 A of joining core wires can be reduced. In other words, it has become clear that the core wire bundle can be made into a single wire with high accuracy by appropriately performing the preliminary temperature adjustment.

  Therefore, in the method and system for manufacturing the terminal-equipped electric wire 1 according to the embodiment of the present invention, the core wire bundle 13 made single by ultrasonic bonding processing regardless of the thickness of the core wire bundle 13 of the wire 10 (ie, bonding core wire It is possible to mold 13A) with high accuracy.

<Other aspects>
The present invention is not limited to the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, and the like of each component in the embodiment described above are arbitrary and not limited as long as the present invention can be achieved.

  For example, in the above embodiment, a device including the cover 61 and the temperature controller 62 is used as the preliminary temperature control device 60. However, instead of such a preliminary temperature control device 60, the ultrasonic bonding device 30 is configured such that the temperature of a part (for example, the horn 31) of members constituting the ultrasonic bonding device 30 can be adjusted, The ultrasonic bonding device 30 (part of the ultrasonic bonding device 30) may be configured to serve as the temperature adjustment device 60.

  For example, as shown in FIG. 7, ultrasonic bonding is performed on a temperature control 63 having one or both of a heater function for warming the horn 31 of the ultrasonic bonding apparatus 30 and a cooler function for cooling the horn 31. The configuration described above can be realized by adding to the device 30. Then, the preliminary adjustment of the core wire bundle 13 can be performed by bringing the heated or cooled horn 31 into contact with the core wire bundle 13 before starting the ultrasonic bonding process. Thereby, the same effect as that of the pre-temperature adjustment apparatus 60 including the cover 61 and the temperature controller 62 can be obtained.

  Furthermore, in the above embodiment, an aluminum wire or an aluminum alloy wire is used as the wire 10. However, instead of this, a wire (copper wire) in which the conductor core wire 12 is made of copper or a copper alloy may be used. Furthermore, as the terminal 20, a terminal formed of aluminum or an aluminum alloy may be used instead of a terminal formed of copper or a copper alloy.

  Furthermore, in the above embodiment, the electrical connection portion 21 of the terminal 20 has a flat connection plate portion 23. However, the electrical connection portion 21 may be configured such that the portion corresponding to the connection plate portion 23 has another shape. For example, the electrical connection portion 21 may be configured to have a tab-shaped portion as a male terminal, or may be configured to have a box-shaped portion as a female terminal.

Here, the features of the embodiment of the method and system for manufacturing a terminal-equipped wire according to the present invention described above will be briefly summarized and listed in the following (1) to (4).
(1)
A method of manufacturing a terminal-attached electric wire (1) in which a terminal (20) is crimped to an electric wire (10) having a core wire bundle (13) in which a plurality of conductor core wires (12) are bundled.
A first step of performing preliminary temperature adjustment so that the core wire bundle has a predetermined target temperature by performing a temperature adjustment process on the core wire bundle (13);
A second step of forming a bonding core wire (13A) in which the plurality of conductor core wires (12) are bonded to each other by subjecting the core wire bundle subjected to the preliminary temperature adjustment to ultrasonic bonding treatment;
And a third step of crimping the terminal (20) to the bonding core wire (13A).
Method of manufacturing terminal-equipped electric wire.
(2)
In the manufacturing method according to the above (1),
The temperature adjustment process
A first process for holding the core wire bundle (13) in a cabinet having a temperature controller (62) corresponding to the target temperature, and a temperature of an indenter (31) for performing the ultrasonic bonding process And / or a second process of adjusting the temperature in accordance with the temperature and bringing the indenter into contact with the core wire bundle (13).
Method of manufacturing terminal-equipped electric wire.
(3)
In the manufacturing method according to the above (1) or (2),
The plurality of conductor core wires (12) are
Formed of aluminum or aluminum alloy,
Method of manufacturing terminal-equipped electric wire.
(4)
A manufacturing system of a terminal-attached electric wire (1) in which a terminal (20) is crimped to an electric wire (10) having a core wire bundle (13) in which a plurality of conductor core wires (12) are bundled,
A preliminary temperature control unit (60) for performing preliminary temperature control so that the core wire bundle (13) has a predetermined target temperature by performing a temperature adjustment process on the core wire bundle (13);
And an ultrasonic bonding portion (30) forming a bonding core wire (13A) in which the plurality of conductor core wires (12) are bonded to each other by performing ultrasonic bonding processing on the core wire bundle after the preliminary temperature adjustment. ,
A terminal crimping portion (40, 50) for crimping the terminal (20) to the bonding core wire (13A);
Terminaled wire manufacturing system.

1 Wire with Terminal 10 Wire 11 Insulating Coating (Insulating Layer)
12 conductor core wire 13 core wire bundle 13A bonding core wire 20 terminal 30 ultrasonic bonding device (ultrasonic bonding portion)
40 Anvil (Terminal Crimping Section)
50 crimper (terminal crimping part)
60 Preliminator (preliminary temperature control unit)
61 cover 62 temperature controller

Claims (4)

It is a manufacturing method of the electric wire with a terminal by which the terminal was crimped to the electric wire which has a core wire bundle with which a plurality of conductor core wires were bundled,
A first step of performing temperature adjustment so that the core wire bundle has a predetermined target temperature by performing a temperature adjustment process on the core wire bundle;
A second step of forming a bonding core wire in which the plurality of conductor core wires are bonded to each other by subjecting the core wire bundle subjected to the preliminary temperature adjustment to ultrasonic bonding treatment;
And a third step of crimping the terminal to the bonding core wire.
Method of manufacturing terminal-equipped electric wire. In the manufacturing method according to claim 1,
The temperature adjustment process
A first process for holding the core wire bundle in a chamber having a temperature controller corresponding to the target temperature, and a temperature of an indenter for performing the ultrasonic bonding process are adjusted according to the target temperature, and Performed by at least one of a second process of bringing an indenter into contact with the core wire bundle;
Method of manufacturing terminal-equipped electric wire. In the manufacturing method according to claim 1 or 2,
The plurality of conductor cores are
Formed of aluminum or aluminum alloy,
Method of manufacturing terminal-equipped electric wire. A manufacturing system of a terminal-attached electric wire in which a terminal is crimped to an electric wire having a core wire bundle in which a plurality of conductor core wires are bundled,
A temperature adjustment unit that performs temperature adjustment so that the core wire bundle has a predetermined target temperature by performing a temperature adjustment process on the core wire bundle;
An ultrasonic bonding portion forming a bonding core wire in which the plurality of conductor core wires are bonded to each other by performing ultrasonic bonding processing on the core wire bundle after the preliminary temperature adjustment;
And a terminal crimping portion for crimping the terminal to the bonding core wire,
Terminaled wire manufacturing system.

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