WO2014192832A1 - 線材接続装置、線材接続方法、及び接続構造体の製造方法 - Google Patents
線材接続装置、線材接続方法、及び接続構造体の製造方法 Download PDFInfo
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- WO2014192832A1 WO2014192832A1 PCT/JP2014/064184 JP2014064184W WO2014192832A1 WO 2014192832 A1 WO2014192832 A1 WO 2014192832A1 JP 2014064184 W JP2014064184 W JP 2014064184W WO 2014192832 A1 WO2014192832 A1 WO 2014192832A1
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- wire
- pressure plate
- solder
- heating body
- holding base
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/005—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for cutting cables or wires, or splicing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/002—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating specially adapted for particular articles or work
- B23K20/004—Wire welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/085—Cooling, heat sink or heat shielding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/04—Single wire
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/021—Soldered or welded connections between two or more cables or wires
- H01R4/022—Soldered or welded connections between two or more cables or wires comprising preapplied solder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/027—Soldered or welded connections comprising means for positioning or holding the parts to be soldered or welded
-
- 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
- H01R4/68—Connections to or between superconductive connectors
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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
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0263—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for positioning or holding parts during soldering or welding process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/32—Wires
Definitions
- the present invention relates to a wire connecting device, a wire connecting method, and a method for manufacturing a connection structure.
- This application claims priority based on Japanese Patent Application No. 2013-112141 for which it applied to Japan on May 28, 2013, and uses the content here.
- Patent Document 1 discloses a connection device 100 for connecting a superconducting wire (see FIG. 5).
- This connecting device 100 includes a lower pressurizing and heating plate 101B provided with a wire accommodating groove 102 having a width substantially equal to that of the wire, and an upper pressurizing and heating plate 101A having a protrusion 112A having a slightly smaller width than the wire accommodating groove 102.
- the opening and closing mechanism 108 is configured to cover the opening of the lower pressurizing and heating plate 101B with the upper pressurizing and heating plate 101A and to heat and pressurize the wire.
- the ends of the wires are accommodated in a wire containing groove 102 with solder sandwiched between them, and are pressed and heated by the lower pressure heating plate 101B and the upper pressure heating plate 101A. As a result, the solder is melted to connect the superconducting wires.
- connection device 100 eliminates the need for an operator to connect the superconducting wires by melting the solder using a soldering iron. That is, it is possible to form a connection structure that exhibits stable connection performance without being affected by the skill of the operator.
- connection device 100 In the connection device 100 described in Patent Document 1, heat and pressure are applied to the wire by a pair of heating and pressing plates 101A and 101B provided with both a heating unit and a pressing unit. Therefore, when this connection apparatus 100 is used, in order to solidify the solder of a connection part, it is necessary to cool a heating part (for example, heater) itself, and a connection requires a long time. Further, when connecting work continuously using the same apparatus, it is necessary to reheat the cooled heater, and it takes a long time to be sufficiently heated. Therefore, there has been a problem that production efficiency is poor.
- a heating part for example, heater
- the present invention has been made in view of the conventional situation as described above, and is a wire connecting device, a wire connecting method, and a connecting structure, which are capable of connecting wires having high production efficiency and exhibiting stable performance.
- the purpose is to provide a manufacturing method.
- the wire connecting device includes a holding base provided with a wire storing groove having a width capable of storing a plurality of wires, a pressure plate positioned above the holding base, and the pressurizing plate.
- a heating body that is located above the pressure plate and includes a heating unit, a first drive unit that can bring the holding base and the pressure plate close to and away from each other, and the holding base and the heating body.
- the pressure plate which is close to the holding base by the first drive unit, and is stored in the wire material storage groove with solder interposed therebetween.
- the plurality of wire rods can be pressurized, and the heating body that is brought close to the holding base by the second drive unit includes the plurality of wire rods that are accommodated in the wire rod housing groove with solder interposed therebetween. It can be heated under pressure via a pressure plate.
- a pressure plate that pressurizes the connection portion of the wire rod and a heating body that heats the connection portion are provided separately, and are applied by the first drive unit and the second drive unit. It is possible to make the pressure plate and the heating body separately approach and separate from the connecting portion of the wire.
- the wire connecting device can be used for connecting a tape-shaped superconducting wire represented by Bi or RE-123.
- the wire connecting device can suppress deterioration of the superconducting wire by shortening the heating time.
- the superconducting wire may be provided with a protective layer of silver or a silver alloy on the outer periphery thereof. Since this protective layer functions as a bypass when the superconducting state of the superconducting wire is broken, it is desired to have a low resistance.
- the solder diffuses in the protective layer, and an alloy of solder and silver may be formed. An alloy of solder and silver has a high electric resistance and cannot sufficiently function as a bypass.
- the wire rod connecting apparatus can suppress diffusion of solder into the protective layer by shortening the heating time. Further, in the wire rod connecting device according to the first aspect, the heating body is kept at a temperature at which the solder melts at all times in order to start and stop the heating to the connecting portion of the wire rod by contacting or separating the heating body from the pressure plate. I can keep it. Therefore, when the next connection operation is continuously performed, it is not necessary to reheat the heating body, and the waiting time until the temperature of the heating body rises to the temperature of melting the solder can be saved. In addition, since the plate-like pressure plate has a large surface area and high heat dissipation characteristics, the temperature of the connecting portion can be lowered quickly, and the time required for solidification of the solder can be shortened. That is, production efficiency can be increased.
- the holding base may be made of a heat insulating material.
- the holding base since the holding base is made of a heat insulating material, the temperature rise of the holding base is suppressed even when the joint portion of the wire is heated, and the solidification of the solder is not hindered during cooling, thereby increasing the production efficiency. be able to.
- the wire connecting device may include a cooling unit that cools the pressure plate.
- a cooling unit for cooling the pressure plate it is possible to quickly cool the pressure plate after the solder is melted and then the heating body is separated from the pressure plate. Can be shortened to increase production efficiency.
- the first drive unit is a first air cylinder that moves the pressure plate up and down (moves up and down), and the second drive unit moves the heating body up and down (up and down).
- the second air cylinder may be moved.
- the ends of the tape-shaped first wire and the ends of the tape-shaped second wire are arranged on the holding base so as to overlap each other via solder.
- Wire arrangement step a heating body is pressed against the first wire and the second wire via a pressure plate, the first wire and the second wire are pressed and heated, and the solder is Melting (pressurizing and heating step), maintaining the state where the first wire and the second wire are pressed by the pressure plate, separating the heating body from the pressure plate, and cooling the pressure plate.
- the solder is solidified and the first wire and the second wire are connected (cooling step).
- the first wire rod is arranged such that the end portion of the tape-shaped first wire rod and the end portion of the tape-shaped second wire rod face each other on the holding base.
- the second wire rod, solder is disposed so as to straddle the first wire rod and the second wire rod
- a connecting wire rod is disposed on the solder (wire rod arranging step)
- a heating body is pressed to the first wire, the second wire, and the connecting wire via a pressure plate, and the first wire, the second wire, and the connecting wire are pressed and heated.
- the solder is melted (pressure heating step), the first wire, the second wire, and the connecting wire are pressed by the pressure plate, and the heating body is moved to the pressure plate.
- the pressure plate is cooled, the solder is solidified, and the first wire and the second wire are connected. Cooling process). According to the wire rod connecting method according to the second aspect or the third embodiment, by using the wire rod connecting apparatus, it is possible to connect wires that have high production efficiency and exhibit stable performance.
- the first wire and the second wire may be superconducting wires.
- the said 3rd aspect WHEREIN A superconducting wire may be sufficient as the said 1st wire, the said 2nd wire, and the said wire for connection. In this case, excessive heat is not applied to the superconducting wire, and the first wire and the second wire can be connected by heating in a short time. Therefore, the characteristic deterioration of the superconducting wire at the time of connection can be suppressed.
- the end of the tape-shaped first wire and the end of the tape-shaped second wire are overlapped with each other via solder on the holding base.
- connection structure Arranged, pressing a heating body against the first wire and the second wire through a pressure plate, pressurizing and heating the first wire and the second wire, and melting the solder, The state in which the first wire and the second wire are pressed by the pressure plate is maintained, the heating body is separated from the pressure plate, the pressure plate is cooled, and the solder is solidified. A wire and the second wire are connected.
- the first end of the tape-like first wire and the end of the tape-like second wire are opposed to each other on the holding base.
- the wire and the second wire are disposed, solder is disposed so as to straddle the first wire and the second wire, a connecting wire is disposed on the solder, and the first wire is disposed.
- the heating element is pressed against the second wire and the connecting wire via a pressure plate, and the solder is applied by pressing and heating the first wire, the second wire, and the connecting wire. Melting, holding the first wire, the second wire, and the connecting wire pressed by the pressure plate, separating the heating body from the pressure plate, and cooling the pressure plate
- the solder is solidified to connect the first wire and the second wire.
- the first wire and the second wire may be superconducting wires.
- the first wire, the second wire, and the connection wire may be a superconducting wire.
- excessive heat is not applied to the superconducting wire, and the first wire and the second wire can be connected by heating in a short time. Therefore, the characteristic deterioration of the superconducting wire at the time of connection can be suppressed.
- the pressure plate that pressurizes the connecting portion of the wire rod and the heating body that heats the connecting portion are provided separately.
- the pressure plate and the heating body can be separately brought close to and separated from the connecting portion of the wire by the first driving unit and the second driving unit. Therefore, after the connecting portion of the wire is heated by the heating body through the pressure plate and the solder is melted, the heating body is separated from the pressure plate (that is, separated from the wire) in a state where the pressure applied by the pressure plate is maintained. The heating to the wire can be stopped immediately.
- the wire is not continuously heated until the heating body cools, and the time until solidification of the solder is shortened and the time required for connection is shortened.
- the plate-like pressure plate has a large surface area and high heat dissipation characteristics, the temperature of the connecting portion can be lowered quickly, and the time required for solidification of the solder can be shortened. That is, production efficiency can be increased.
- the heating body is started or stopped by contacting or separating the heating body from the pressure plate. The heating body can always be kept at a temperature at which the solder melts. Therefore, when the next connection operation is continuously performed, it is not necessary to reheat the heating body, and the waiting time until the temperature of the heating body rises to the temperature of melting the solder can be saved.
- the wire rod connecting apparatus 1 includes a holding base 7 on which a wire rod to be connected is placed, a pressure plate 5 disposed above the holding base 7, and a heating body 4 disposed further above.
- the holding base 7 is a rectangular parallelepiped base, and the upper surface 7b of the holding base 7 is formed in a substantially rectangular shape having a long side in a direction coinciding with the longitudinal direction of the wire to be connected.
- the upper surface 7b is formed with a wire material storage groove 7a for storing the wire material over the entire length of the holding base 7 in the longitudinal direction.
- the depth of the wire accommodating groove 7a is preferably substantially the same as or greater than the sum of the thicknesses of the overlapping portions of the pair of wires to be connected and the solder.
- the width of the wire material storage groove 7a is substantially the same as the width of the wire material, the wire material is placed in the wire material storage groove 7a with the solder sandwiched therebetween, and the wires are displaced from each other by melting and solidifying the solder. No connection structure can be formed. In addition, the molten solder does not protrude from the side surface of the wire. Therefore, the width dimension of the connection portion and the non-connection portion does not change, and inconvenience does not occur in the handling of the connection portion.
- a clamp mechanism (not shown) for holding the wire rod may be provided in the vicinity of both ends in the longitudinal direction of the wire rod housing groove 7a.
- the wire rod can be held by the clamp mechanism in a state where the wire rod is arranged in the wire rod storage groove 7a. Therefore, the wire rods can be reliably prevented from shifting in the longitudinal direction, and the wire rods are overlapped.
- a portion (connection portion) to be joined by solder can be formed to a predetermined length.
- the pressure plate 5 is made of a thin plate material formed in a rectangle having a long side in the same direction as the long side of the upper surface 7 b of the holding base 7, and is formed slightly smaller than the upper surface 7 b of the holding base 7.
- the upper surface 5b of the pressure plate 5 is formed flat, and a contact surface with the lower surface 4a of the heating body 4 also formed flat is secured.
- a rectangular parallelepiped projection 5 a having a width slightly smaller than the width of the wire material storage groove 7 a of the holding base 7 is provided at the center of the lower surface of the pressure plate 5.
- the protrusion height of the protrusion 5a is formed to be substantially the same as the depth of the wire material storage groove 7a. However, there is no particular limitation as long as it is formed to a height that can pressurize the upper surface of the wire of the connecting portion in a state where the wires to be connected are stored in the wire storage groove 7a with the solder interposed therebetween.
- the length in the longitudinal direction of the protrusion 5a is about 2/3 of the total length of the wire housing groove 7a, but the length of the portion where the wires to be connected overlap each other. If it is more than this, it will not specifically limit.
- the heating element 4 disposed above the pressure plate 5 has a block shape whose longitudinal direction is the same direction as the longitudinal direction of the pressure plate 5.
- the heating element 4 includes a heating part, and can heat the solder of the connection part to a melting point or higher via the pressure plate 5.
- the heating unit may be any device as long as the lower surface 4a of the heating body 4 can be heated to the melting point of the solder or higher, but an energizing electric heater or the like can be used.
- the lower surface 4a of the heating body 4 is formed flat, and is configured to transmit the heat of the heating body 4 by being in surface contact with the upper surface 5b of the pressure plate 5.
- the lower surface 4a of the heating body 4 is configured to cover the projected area of the protruding portion 5a of the pressure plate 5, and thereby, the connecting portion of the wire can be immediately heated via the protruding portion 5a.
- the first rod 2A extending in the vertical direction is attached to two corners on one long side of the four corners of the upper surface 5b, which is the upper surface 5b of the pressure plate 5.
- the pressure plate 5 is held by the pair of first rods 2A and 2A.
- the pair of first rods 2 ⁇ / b> A and 2 ⁇ / b> A are connected through the first air cylinder (first drive unit) 2, and the pressure plate 5 can be moved up and down by the first air cylinder 2. . Since the pair of first rods 2A and 2A are driven in synchronism, the pressure plate 5 translates in the vertical direction.
- a second rod 3 ⁇ / b> A extending in the vertical direction is attached to the upper surface of the heating body 4 and in the vicinity of both ends in the longitudinal direction of the heating body 4.
- the heating body 4 is held by the pair of second rods 3A and 3A.
- the pair of second rods 3 ⁇ / b> A and 3 ⁇ / b> A are connected through the second air cylinder (second drive unit) 3, and the heating body 4 can be moved up and down by the second air cylinder 3.
- the second rods 3A and 3A are driven in synchronism with each other, and the heating element 4 is translated in the vertical direction.
- a pipe (not shown) to which compressed air is supplied is connected to the first air cylinder 2 and the second air cylinder 3, and the first rod 2A, 2A or the second rod 3A, 3A is vertically moved by air pressure.
- the first air cylinder 2 and the second air cylinder 3 are fixed so that the relative distance with respect to the holding base 7 does not change, but this fixing portion is omitted in FIGS. 1A and 1B. did.
- An air cooling fan (cooling unit) 6 is installed on the long side edge of the upper surface 7 b of the holding base 7 so as to avoid the movable range of the pressure plate 5 and the heating body 4.
- the air-cooling fan 6 is installed for the purpose of air-cooling the pressure plate 5 in a state where the pressure plate 5 is lowered so as to overlap the holding base 7, and the air is directed toward the upper surface 5 b of the pressure plate 5 in the lowered state. Is configured to be able to send. It is preferable that the air direction opening of the air cooling fan 6 is configured to have substantially the same length as the long side of the upper surface 5b of the pressure plate 5 so that the entire upper surface 5b of the pressure plate 5 can be air-cooled.
- the wire connecting device 1 of the present embodiment is schematically configured as described above. Below, each component of the wire connecting device 1 will be described in more detail. It is desirable to use a heat insulating material having a low heat conductivity and a high heat insulating property made of ceramics or the like as a material of the holding base 7 that serves as a base for arranging the wire. As a result, the holding base 7 can suppress the temperature rise, and can increase the production efficiency without preventing the solidification of the solder. As ceramics that can be used as the material of the holding base 7, machinable ceramics such as Macor, Photovale, etc. (both are registered trademarks) having high heat insulation properties and high machinability can be suitably used.
- machinable ceramics such as Macor, Photovale, etc. (both are registered trademarks) having high heat insulation properties and high machinability can be suitably used.
- the pressure plate 5 fulfills a function (clamp function) for preventing the wires to be connected from being displaced in the longitudinal direction of the wire and a function for transferring the heat of the heating body 4 to the joint of the wires. Therefore, it is desirable that the pressure plate 5 is made of a material and a shape that have sufficient strength to sufficiently pressurize the connecting portion of the wire, and that can sufficiently transfer the heat from the heating body 4 to the connecting portion of the wire. . Further, the pressure plate 5 has a function of securing a heat radiation area and promoting cooling of the solder at the wire joint portion. Therefore, it is preferable to be made of a material having high heat dissipation characteristics.
- a metal material having a thickness of about 1 to 10 mm As the metal material, stainless steel or the like is used, and materials having high thermal conductivity and heat transfer coefficient such as aluminum, copper, and alloys thereof are preferably used.
- the pressure plate 5 Since the pressure plate 5 is formed in a thin plate shape, the surface area can be increased, and the heat dissipation characteristics can be improved.
- the pressure plate 5 is desirably formed as thin as possible. Thus, not only can the heat from the heating element 4 be efficiently transmitted to the connecting portion of the wire, but also the time required for cooling can be shortened and the solidification of the solder can be accelerated. That is, production efficiency can be increased.
- fins may be provided on the surface of the pressure plate 5. By providing the fins on the surface, the pressure plate 5 is more effectively cooled by the cooling by the air cooling fan 6 and the solidification of the solder can be accelerated. In addition, when providing a fin, a fin is not formed in a contact part with the heating body 4. FIG.
- the pressure plate 5 preferably includes a temperature measuring unit.
- the temperature measuring unit is not particularly limited as long as it can measure the temperature near the melting point of the solder.
- a thermocouple or the like can be employed. Since the pressure plate 5 includes the temperature measuring unit, the temperature of the connecting portion of the wire, that is, the melting state of the solder can be determined. Therefore, in a state where the heating body 4 is pressed against the wire through the pressure plate 5, when it is determined that the solder is sufficiently melted, the heating body 4 is separated from the pressure plate 5 and the connection portion Cooling can begin. Furthermore, when it is determined that the solder is sufficiently solidified, the pressure plate 5 can be separated from the wire and the connection process can be completed.
- the heating body 4 includes a temperature measurement unit.
- the control part which controls a heating part based on the temperature measured by the said temperature measurement part.
- a temperature measuring unit and a control unit are necessary to prevent the wire from being heated excessively to a temperature at which superconducting characteristics deteriorate (for example, 300 ° C. or higher).
- a thermocouple can be employed in the same manner as the temperature measurement unit provided in the pressure plate 5.
- the pressure plate 5 alone or the pressure plate 5 and the heating body 4 is used to pressurize the connecting portion of the wire.
- the applied pressure of the connecting portion needs to be controlled so that the wire is not damaged.
- the pressure is controlled so that the crystal structure of the superconducting conductor is not damaged (for example, 20 MPa or less).
- the drive unit is not limited to the air cylinder, and other drive units such as a motor drive may be employed. In that case, it is desirable to provide a control unit for the applied pressure.
- the pressure plate 5 and the heating body 4 are moved up and down by the first air cylinder 2 or the second air cylinder 3 so as to be close to and away from the holding base 7.
- the holding base 7 may be provided with a certain driving unit, and the holding base 7 may be moved up and down by the driving unit so that the holding base 7 approaches and separates from the pressure plate 5 and the heating body 4.
- the air cooling fan (cooling unit) 6 serves as a cooling unit that cools the pressure plate 5 in a state where the pressure plate 5 overlaps the upper surface 7 b of the holding base 7.
- the cooling unit that cools the pressure plate 5 can be quickly cooled, the time required for solidification of the solder in the connection portion can be shortened, and the production efficiency can be increased.
- a water cooling type cooling unit may be used as the cooling unit.
- the wire connecting device 1 includes a storage unit (not shown) that stores optimum connection conditions and a control device (not shown) that controls a series of processes according to the connection conditions stored in the storage unit. It is desirable that Thereby, by setting the wire to be connected to the wire connecting device 1 and inputting various conditions, the connection process can be automatically completed, and stable wire connection is easily and reliably performed. Can be made.
- the wire connecting device 1 can be used for connecting various wires as long as it is a wire connected by solder, but is particularly preferably used for connecting superconducting wires.
- superconducting conductors used for superconducting wires include Bi-based superconducting wires Bi 2 Sr 2 Ca 2 Cu 3 O 10 + ⁇ (Bi2223), RE-123-based superconducting wires REBa 2 Cu 3 O 7-x (RE is a rare earth element), and the like. Are known.
- the Bi-based superconducting wire is manufactured by the Powder In Tube method (PIT method) or the like so that the Bi-based superconducting layer is covered with an Ag sheath material, and has a tape-like structure.
- PIT method Powder In Tube method
- an oxide superconducting layer is laminated on a tape-like metal substrate by an intermediate layer through an intermediate layer, and a thin silver protective layer is formed on the oxide superconducting layer.
- the structure is known.
- a structure is known in which a metal tape made of a highly conductive metal material such as copper is further laminated on the protective layer via a solder layer to form a stabilization layer.
- the wire connecting device 1 is applied to the connection of a tape-like wire, it can be suitably used for the Bi-based superconducting wire described above and the RE-123-based superconducting wire.
- RE-123 series superconducting wires include those having a width of about 10 mm and a thickness of about 0.1 mm.
- FIG. 2A shows a first connection structure 20 in which a first wire 8 and a second wire 9 which are a pair of tape-like wires are connected by solder 10.
- a connection portion 20 a is formed by joining a portion where the end portion 8 a of the first wire 8 and the end portion 9 a of the second wire 9 overlap with each other with the solder 10.
- a protective layer or a stabilization layer which is the uppermost layer of the laminated structure
- FIG. 2B shows a second connection structure 21 in which a first wire 11 and a second wire 12 which are a pair of tape-like wires are connected via a tape-like connecting wire 13.
- the end 11 a of the first wire 11 and the end 12 a of the second wire 12 are arranged to face each other, and the connecting wire extends between these ends. 13 is bridging.
- Solder 14 is interposed between the first wire 11 and the connecting wire 13 and between the second wire 12 and the connecting wire 13, and is joined by the solder 14 to form a connecting portion 21a. Yes.
- the first wire 11 and the second wire Arrange the wires 12 in the same lamination direction, and make the protective layer or stabilization layer of the connecting wire 13 face the protective layer or stabilization layer of the first wire 11 and the second wire 12.
- the connection portion 21a having a low electric resistance can be formed.
- superconducting wires may be used as the first wire 11 and the second wire 12, and the connecting wire 13 may be composed of a metal wire.
- the form before melting of the solders 10 and 14 used in the first connection structure 20 and the second connection structure 21 may be any of a linear shape, a tape shape, and a paste shape.
- solders 10 and 14 conventionally known solders can be used.
- Sn solder made of an alloy containing Sn as a main component such as Sn, Sn—Ag alloy, Sn—Bi alloy, Sn—Cu alloy, Sn—Zn alloy, Pb—Sn alloy solder, eutectic solder, low temperature solder and the like can be mentioned.
- These solders can be used alone or in combination of two or more. Among these, it is preferable to use solder having a melting point of 300 ° C.
- the superconducting wire may be affected by heat and the superconducting characteristics may deteriorate. In particular, when the melting point of the solder is 300 ° C. or higher, the wire is heated to 300 ° C. or higher. When a superconducting wire is connected, the superconducting characteristics may be deteriorated.
- FIG. 3 is a schematic cross-sectional view of a connection portion when the above-described first connection structure 20 is connected by the wire connecting device 1 of the present embodiment.
- the second wire 9, the solder 10, and the first wire 8 are sequentially stored in the wire storage groove 7 a of the holding base 7, and the connecting portion 20 a is pressurized from above by the protruding portion 5 a of the pressure plate 5. 1A and 1B), the solder 10 is melted by heating.
- the first connection structure 20 can be formed by separating the heating body 4 from the pressure plate 5 and solidifying the solder 10.
- the 1st wire rod 11 is set so that the edge part 11a of the 1st wire rod 11 and the edge part 12a of the 2nd wire rod 12 may oppose the wire rod accommodating groove 7a.
- the second wire 12 are disposed, and the solder 14 is disposed so as to straddle the first wire 11 and the second wire 12.
- the connecting wire 13 is disposed and accommodated on the solder 14, and is pressed and heated by the pressing plate 5 and the heating body 4 from above to melt and further solidify the solder, whereby the second connection described above.
- the structure 21 can be formed.
- the power source of the wire connecting device 1 is turned on to heat the heating body 4 and raise the temperature of the lower surface 4a of the heating body 4 to a predetermined temperature (temperature higher than the melting point of solder).
- a predetermined temperature temperature higher than the melting point of solder.
- the heating body 4 and the pressure plate 5 may be arranged apart from each other or may be arranged in contact with each other. In the case where the heating body 4 and the pressure plate 5 are arranged in contact with each other, it is preferable that preheating can be applied to the pressure plate 5 in advance, and solder can be melted more quickly.
- a pair of wires to be connected to the wire rod storage groove 7a of the holding base 7 is stacked and stored (wire rod placement step).
- the solder is sandwiched between the overlapping portions.
- the paired wires and the solder before melting are referred to as pre-connection wires 20A.
- a gap is formed between the vertical wall of the wire housing groove 7a and the side surface of the wire for the sake of clarity, but no gap is formed because the width of the groove is substantially equal to the width of the wire. .
- the first air cylinder 2 lowers the first rod 2 ⁇ / b> A and the pressure plate 5, and the pressure plate 5 overlaps the holding base 7. In this state, it is possible to prevent the protrusions 5a of the pressure plate 5 from pressing the upper surface of the pre-connection wire 20A, thereby preventing the wires of the pre-connection wire 20A from shifting (see FIG. 3).
- the second rod 3 ⁇ / b> A and the heating body 4 are lowered by the second air cylinder 3, and the lower surface 4 a of the heating body 4 is brought into contact with the upper surface 5 b of the pressure plate 5.
- the heat of the heating body 4 is transmitted to the pressure plate 5 and further transmitted from the protrusion 5a of the pressure plate 5 to the pre-connection wire 20A to melt the solder.
- the heating body 4 presses the upper surface 5 b of the pressure plate 5 by the second air cylinder 3. Therefore, the pre-connection wire 20A melts the solder in a state where it is pressurized not only by the pressure plate 5 but also by the heating body 4 (pressure heating step).
- the superposed pair of wires and the molten solder are referred to as a molten solder wire 20B.
- the pressure plate 5 and the heating body 4 are separately lowered as shown in FIGS. 4B and 4C, but they may be simultaneously lowered.
- the second air cylinder 3 raises the second rod 3 ⁇ / b> A and the heating body 4.
- the pressure plate 5 remains on the holding base 7 and continues to pressurize the upper surface of the molten solder wire 20B until the solder is solidified.
- the upper surface 5b of the pressure plate 5 is cooled by the air cooling fan 6, the temperature of the pressure plate 5 is lowered, and the solidification of the solder is promoted.
- the distance between the raised heating body 4 and the pressure plate 5 staying on the holding base 7 is separated to a sufficient distance so that the radiant heat from the heating body 4 is not transmitted to the pressure plate 5.
- the pressure plate 5 is sufficiently cooled and the predetermined temperature is lowered, the molten solder of the molten solder wire 20B is solidified (cooling step).
- the fan stops when the pressure plate 5 reaches a predetermined temperature after the start of cooling or when a predetermined time elapses. Further, as shown in FIG. 4E, the first air cylinder 2 adds to the first rod 2A. The pressure plate 5 rises. Accordingly, a connection structure can be formed, and the connection structure can be taken out (takeout step) and applied to various products. Moreover, since the heating body 4 of the wire connecting device 1 is maintained at a temperature at which the solder can be melted, the next wire can be connected immediately.
- the 1st wire rod 11 is set so that the edge part 11a of the 1st wire rod 11 and the edge part 12a of the 2nd wire rod 12 may oppose the wire rod accommodating groove 7a.
- the second wire 12 are disposed, and the solder 14 is disposed so as to straddle the first wire 11 and the second wire 12.
- the second connection structure 21 can be formed by a procedure similar to the above connection procedure.
- the connecting portion of the wire is heated by the heating body 4 via the pressure plate 5, the solder is melted, and then the heating body 4 is held in a state where the pressure applied by the pressure plate 5 is maintained. It can be separated from the pressure plate 5 (that is, separated from the wire), and heating of the wire can be stopped immediately. As a result, heat is not continuously applied to the wire until the heating body 4 cools, and the time until solidification of the solder is shortened and the time required for connection is shortened. Moreover, when using the wire connection apparatus 1 of this embodiment for the connection of a superconducting wire, deterioration of a superconducting wire can be suppressed by shortening heating time.
- the wire connecting device 1 of the present embodiment starts and stops heating the connecting portion of the wire by bringing the heating member 4 into contact with or away from the pressure plate 5. Can be kept in. Therefore, when the next connection operation is continuously performed, it is not necessary to reheat the heating body, and the waiting time until the temperature of the heating body rises to the temperature of melting the solder can be saved.
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Abstract
Description
本願は、2013年5月28日に日本に出願された特願2013-112141号に基づき優先権を主張し、その内容をここに援用する。
上記第一態様に係る線材接続装置においては、線材の接続部を加圧する加圧板と、接続部を加熱する加熱体とが別々に設けられており、第1駆動部及び第2駆動部によって加圧板と加熱体とをそれぞれ別々に線材の接続部に対して近接及び離間させることが可能である。したがって、線材の接続部を加圧板を介して加熱体によって加熱し、半田を溶融した後、加圧板による加圧を保持した状態で、加熱体を加圧板から離間させ(即ち線材から離間させ)、線材に対する加熱を即座に休止することができる。これにより、加熱体が冷却するまで線材に熱をかけ続けることがなく、半田凝固までの時間が短くなり接続に要する時間が短縮される。
上記第一態様に係る線材接続装置は、Bi系やRE-123系に代表されるテープ状の超電導線材の接続に使用することができる。超電導線材は、熱により超電導特性の低下を起こすことがあるが、上記第一態様に係る線材接続装置は、加熱時間を短くすることで超電導線材の劣化を抑制できる。また、超電導線材は、その外周に銀又は銀合金の保護層を備えている場合がある。この保護層は、超電導線材の超電導状態が破れた場合のバイパスとして機能するため、低抵抗であることが望まれる。接続時の加熱時間が長くなると、この保護層に半田が拡散し、半田と銀との合金を形成することがある。半田と銀との合金は、電気抵抗が高くバイパスとしての機能を十分に果たすことができなくなる。上記第一態様に係る線材接続装置は、加熱時間を短くすることにより、半田の保護層への拡散を抑制できる。
また、上記第一態様に係る線材接続装置において、加熱体を加圧板に接触又は離間させることで線材の接続部への加熱開始及び停止を行うため、加熱体を常時半田が溶融する温度に保っておくことができる。したがって、次の接続作業を連続して行う場合において、加熱体を再度加熱する必要がなく、加熱体の温度が半田溶融の温度まで上昇するまでの待機時間を節約できる。
加えて、板状の加圧板は、表面積が大きく放熱特性が高いため、接続部の温度を早く下げることができ、半田の凝固に要する時間を短縮できる。即ち生産効率を上げることができる。
この場合、保持基台が断熱材料からなることで、線材の接合部を加熱しても保持基台の温度上昇が抑制され、冷却時において半田の凝固を妨げることがなく、生産効率を上昇させることができる。
加圧板を冷却する冷却部を有する場合、半田を溶融させた後、加熱体を加圧板から離間させた状態で、加圧板を素早く冷却することが可能となり、接続部の半田の凝固に要する時間を短縮し生産効率を上げることができる。
第1駆動部及び第2駆動部としてエアシリンダを用いる事で、所定の圧力で線材を加圧することが可能となるため、線材の破損を抑制できる。
本発明の第三態様に係る線材接続方法は、保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とが互いに対向するように前記第1の線材と前記第2の線材とを配置し、前記第1の線材と前記第2の線材とを跨ぐように半田を配置し、前記半田の上に接続用線材を配置し(線材配置工程)、前記第1の線材、前記第2の線材、及び前記接続用線材に加圧板を介して加熱体を押し当て、前記第1の線材、前記第2の線材、及び前記接続用線材を加圧及び加熱し前記半田を溶融させ(加圧加熱工程)、前記第1の線材、前記第2の線材、及び前記接続用線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する(冷却工程)。
上記第二態様または第三態様に係る線材接続方法によれば、前記線材接続装置を用いる事によって、生産効率が高く、安定した性能を発揮する線材の接続が可能となる。
また、上記第三態様において、前記第1の線材及び前記第2の線材、及び前記接続用線材が超電導線材であってもよい。
この場合、超電導線材に過剰な熱が加わることがない上に、短時間の加熱により前記第1の線材と前記第2の線材とを接続することが可能となる。したがって、接続時の超電導線材の特性劣化を抑制できる。
本発明の第四態様に係る接続構造体の製造方法は、保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とを半田を介して互いに重ね合わせて配置し、前記第1の線材及び前記第2の線材に加圧板を介して加熱体を押し当て、前記第1の線材及び前記第2の線材を加圧及び加熱し前記半田を溶融させ、前記第1の線材及び前記第2の線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する。
本発明の第五態様に係る接続構造体の製造方法は、保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とが互いに対向するように第1の線材と第2の線材とを配置し、前記第1の線材と前記第2の線材とを跨ぐように半田を配置し、前記半田の上に接続用線材を配置し、前記第1の線材、前記第2の線材、及び前記接続用線材に加圧板を介して加熱体を押し当て、前記第1の線材、前記第2の線材、及び前記接続用線材を加圧及び加熱し前記半田を溶融させ、前記第1の線材、前記第2の線材、及び前記接続用線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する。
また、上記第四態様又は第五態様において、前記第1の線材及び前記第2の線材が、超電導線材であってもよい。
また、上記第五態様において、前記第1の線材、前記第2の線材、及び前記接続用線材が超電導線材であってもよい。
この場合、超電導線材に過剰な熱が加わることがない上に、短時間の加熱により前記第1の線材と前記第2の線材とを接続することが可能となる。したがって、接続時の超電導線材の特性劣化を抑制できる。
また、上記態様に係る線材接続装置、線材接続方法、及び接続構造体の製造方法によれば、加熱体を加圧板に接触又は離間させることで線材の接続部への加熱開始及び停止を行うため、加熱体を常時半田が溶融する温度に保っておくことができる。したがって、次の接続作業を連続して行う場合において、加熱体を再度加熱する必要がなく、加熱体の温度が半田溶融の温度まで上昇するまでの待機時間を節約できる。
図1A、図1Bに本発明の一実施形態に係る線材接続装置1の側面図及び正面図を示す。
線材接続装置1は、接続しようとする線材を載置する保持基台7と、その上方に配置される加圧板5と、さらにこの上方に配置される加熱体4を備えている。
保持基台7は直方体の土台であり、その上面7bは、接続しようとする線材の長手方向と一致する方向を長辺とする略長方形に形成されている。当該上面7bには、保持基台7の長手方向全長に亘り線材を収納するための線材収納溝7aが形成されている。線材収納溝7aの深さは、接続しようとする一対の線材の重なり部と半田の厚みの総和と略同じかそれ以上であることが望ましい。
加圧板5の上面5bは、平坦に形成されており、同じく平坦に形成された加熱体4の下面4aとの接触面が確保されている。
また、前記加圧板5の下面中央部には、前記保持基台7の線材収納溝7aの幅より若干小さい幅を有する直方体の突起部5aが設けられている。この突起部5aと線材収納溝7aは、保持基台7と加圧板5を重ね合わせた際に、位置ずれを起こすことなく嵌合するように構成されている。
本実施形態において、突起部5aの突起高さは、線材収納溝7aの深さと略同じに形成されている。しかしながら、接続しようとする線材同士を半田を挟んで前記線材収納溝7aに収納した状態で、接続部の線材上面を加圧することができる高さに形成されていれば特に限定されない。
また、本実施形態において、突起部5aの長手方向長さは、前記線材収納溝7aの全長に対して2/3程度の長さとされているが、接続しようとする線材同士が重なり合う部分の長さ以上であれば特に限定されない。
同様に、加熱体4の上面であり当該加熱体4の長手方向両端部近傍には、それぞれ鉛直方向に延びる第2ロッド3Aが取り付けられている。加熱体4は、これら一対の第2ロッド3A、3Aによって保持されている。一対の第2ロッド3A、3Aは第2エアシリンダ(第2駆動部)3を貫通して接続されており、当該第2エアシリンダ3によって、加熱体4は、鉛直方向に昇降可能である。また、第2ロッド3A、3Aの駆動は同期して行われ、加熱体4は鉛直方向に平行移動する。
なお、第1エアシリンダ2及び第2エアシリンダ3は、保持基台7に対して相対的な距離が変わらないように固定されているが、図1A,及び図1Bにおいてはこの固定部を省略した。
空冷ファン6の風向口は、加圧板5の上面5b全体を空冷することができるように、加圧板5の上面5bの長辺長さと略同じ長さに構成されていることが好ましい。
線材を配置する土台となる保持基台7の材料としてセラミックスなどからなる熱伝導率が低く、断熱特性の高い断熱材料を用いる事が望ましい。これによって、保持基台7は、温度上昇が抑制され、半田の凝固を妨げることがなく、生産効率を上昇させることができる。
保持基台7の材料として用いる事ができるセラミックスとしては、例えば、断熱特性が高くかつ機械加工性が高いマコール、ホトベール等(いずれも登録商標)のマシナブルセラミックスを好適に使用することができる。
また、加圧板5は、放熱面積を確保し線材接合部の半田の冷却を促進する機能を有する。したがって、放熱特性が高い材質からなることが好ましい。具体的には、厚さ1~10mm程度の金属材料を用いる事が好ましい。金属材料としては、ステンレス等が用いられるほか、アルミニウム、銅、及びそれらの合金等の熱伝導率及び熱伝達率の高い材料が好適に用いられる。
熱伝達特性を上昇させる目的で、加圧板5の表面にフィンを設けても良い。表面にフィンを設けることで、空冷ファン6による冷却時により効果的に加圧板5が冷却され、半田の凝固を早めることができる。なお、フィンを設ける場合においては、加熱体4との接触部にはフィンを形成しない。
加圧板5が温度計測部を備えていることによって、線材の接続部の温度、即ち、半田の溶融状態を判断することができる。したがって、線材に加圧板5を介して加熱体4を押し当てた状態においては、半田が十分に溶融していると判断された時点で、加熱体4を加圧板5から離間させ、接続部の冷却を開始することができる。さらに、半田が十分に凝固していると判断された時点で、加圧板5を線材から離間させ接続工程を完了させることができる。
特に、超電導線材を接続する場合においては、線材を過剰に加熱して超電導特性が劣化する温度(例えば300℃以上)となることを防ぐために、温度計測部及び制御部が必要となる。温度計測部としては、加圧板5に備えられる温度計測部と同様に熱電対を採用することができる。
冷却部としては、本実施形態における空冷ファン6を用いるほかに、水冷式の冷却部を用いても良い。
次に、本実施形態の線材接続装置1により接続される線材及び、接続後の接続構造体について説明する。
線材接続装置1は、半田により接続される線材であれば、様々な線材の接続に用いる事ができるが、特に超電導線材の接続に好適に用いられる。
一方、RE-123系超電導線材は、テープ状の金属基材上に中間層を介し成膜法により酸化物超電導層を積層し、さらに前記酸化物超電導層上に薄い銀の保護層を形成する構造が公知である。さらに、この保護層の上にさらに上に銅などの良導電性金属材料からなる金属テープを、半田層を介して積層し、安定化層とした構造等が知られている。
線材接続装置1は、テープ状の線材の接続に適用されるため、上述したBi系超電導線材や、RE-123系超電導線材に好適に用いる事ができる。
RE-123系の超電導線材としては、例えば幅10mm、厚さ0.1mm程度のものが例示される。
この第1接続構造体20の第1の線材8及び第2の線材9として、積層構造を有するRE-123系超電導線材を用いる場合においては、積層構造の最上層である保護層または安定化層同士を、対向させて超電導線材を接続することで、電気抵抗が低い接続部20aを構成することができる。
なお、幅10mmの超電導線材同士の接続においては、半田で接合される部分の長手方向の長さは、10mm以上であることが望ましい。
この第2接続構造体21では、第1の線材11の端部11aと、第2の線材12の端部12aとが互いに対向して配置され、これらの端部間に跨るように接続用線材13が橋渡ししている。第1の線材11と接続用線材13の間、並びに第2の線材12と接続用線材13との間には、半田14が介在し、当該半田14により接合され、接続部21aを形成している。
また、第1の線材11、第2の線材12として超電導線材を用い、接続用線材13を金属線材で構成しても良い。
超電導線材は、熱による影響を受け超電導特性が劣化することがある。特に、半田の融点が300℃以上の場合は、線材が300℃以上に加熱されることとなり、超電導線材を接続する場合においては、超電導特性が劣化する虞がある。
保持基台7の線材収納溝7aに第2の線材9、半田10、第1の線材8を順に収納し、上部から加圧板5の突起部5aにより接続部20aを加圧し、加熱体4(図1A、及び図1B参照)により、加熱することで半田10を溶融する。さらに、加熱体4を加圧板5から離間させ、半田10を凝固させることで、第1接続構造体20を形成することができる。
また、第2接続構造体21の形成方法においては、線材収納溝7aに、第1の線材11の端部11aと第2の線材12の端部12aとが対向するように第1の線材11と第2の線材12とを配置し、第1の線材11と第2の線材12とをまたぐように半田14を配置する。半田14の上に接続用線材13を配置して収納し、上部から加圧板5、加熱体4により、加圧及び加熱を行い、半田を溶融させ、さらに凝固させることで、上述の第2接続構造体21を形成することができる。
次に、図4A~図4Eを基に、線材接続装置1を用いた線材の接続における、線材接続装置1の動作手順について詳しく説明する。
初めに線材接続装置1の電源をいれて、加熱体4を加熱し、所定の温度(半田の融点以上の温度)まで加熱体4の下面4aを昇温させる。この初期状態において、加熱体4と加圧板5は離間して配置されていても、接触して配置されていても良い。加熱体4と加圧板5とを接触して配置する場合においては、予め加圧板5に予熱を与えることができ、半田の溶融がより素早くでき、望ましい。
なお、図4Aにおいて、分かり易さのため線材収納溝7aの縦壁と線材の側面との間に隙間が形成されているが、溝の幅と線材の幅は略等しいため、隙間は形成されない。
半田が溶融する際に、第2エアシリンダ3によって加熱体4は、加圧板5の上面5bを加圧する。したがって、接続前線材20Aは、加圧板5のみならず加熱体4によって加圧された状態で、半田を溶融させる(加圧加熱工程)。
この重ね合わされた一対の線材と溶融した半田を溶融半田線材20Bと呼ぶ。
なお、本実施形態においては、加圧板5と加熱体4は、図4B、4Cに示すように、別々に下降したが、これらは同時に下降しても良い。
上昇された加熱体4と保持基台7上に留まる加圧板5との距離は、加熱体4からの放射熱が加圧板5に伝わらない十分な距離に離間されている。
加圧板5の冷却が十分に行われ、所定の温度が下がると、溶融半田線材20Bの溶融した半田が凝固する(冷却工程)。
また、線材接続装置1の加熱体4は、半田を溶融できる温度に保持されているため、すぐに次の線材の接続を行うことができる。
また、第2接続構造体21の形成方法においては、線材収納溝7aに、第1の線材11の端部11aと第2の線材12の端部12aとが対向するように第1の線材11と第2の線材12とを配置し、第1の線材11と第2の線材12とをまたぐように半田14を配置する。半田14の上に接続用線材13を配置した後は、上記接続手順と同様の手順によって第2接続構造体21を形成することができる。
また、本実施形態の線材接続装置1を超電導線材の接続に用いる場合においては、加熱時間を短くすることで超電導線材の劣化を抑制できる。加えて、加熱時間を短くすることで、超電導線材の外周に銀又は銀合金の保護層を備えている場合や、その内部に銀層と半田層の境界部を有する場合において、銀層に半田が拡散することを抑制することができる。したがって、銀層の電気抵抗が上昇することを抑制できる。
Claims (12)
- 複数の線材を収納可能な幅を有する線材収納溝が設けられた保持基台と、
前記保持基台の上方に位置する加圧板と、
前記加圧板の上方に位置し、加熱部を備えた加熱体と、
前記保持基台と前記加圧板とを近接及び離間させることが可能な第1駆動部と、
前記保持基台と前記加熱体とを近接及び離間させることが可能な第2駆動部と、を有し、
前記第1駆動部によって前記保持基台に近接された前記加圧板は、前記線材収納溝に半田を介し重ねて収納された前記複数の線材を、加圧可能であり、
前記第2駆動部によって前記保持基台に近接された前記加熱体は、前記線材収納溝に半田を介し重ねて収納された前記複数の線材を前記加圧板を介し加圧加熱可能である線材接続装置。 - 前記保持基台が、断熱材料からなる請求項1に記載の線材接続装置。
- 前記加圧板を冷却する冷却部をさらに有する請求項1又は2に記載の線材接続装置。
- 前記第1駆動部が、前記加圧板を上下させる第1エアシリンダであり、前記第2駆動部が、前記加熱体を上下させる第2エアシリンダである請求項1~3の何れか一項に記載の線材接続装置。
- 保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とを半田を介して互いに重ね合わせて配置し、前記第1の線材及び前記第2の線材に加圧板を介して加熱体を押し当て、前記第1の線材及び前記第2の線材を加圧及び加熱し前記半田を溶融させ、
前記第1の線材及び前記第2の線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する線材接続方法。 - 保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とが互いに対向するように前記第1の線材と前記第2の線材とを配置し、
前記第1の線材と前記第2の線材とを跨ぐように半田を配置し、
前記半田の上に接続用線材を配置し、
前記第1の線材、前記第2の線材、及び前記接続用線材に加圧板を介して加熱体を押し当て、前記第1の線材、前記第2の線材、及び前記接続用線材を加圧及び加熱し前記半田を溶融させ、
前記第1の線材、前記第2の線材、及び前記接続用線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する線材接続方法。 - 前記第1の線材及び前記第2の線材が、超電導線材である請求項5又は6に記載の線材接続方法。
- 前記第1の線材、前記第2の線材、及び前記接続用線材が超電導線材である請求項6に記載の線材接続方法。
- 保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とを半田を介して互いに重ね合わせて配置し、
前記第1の線材及び前記第2の線材に加圧板を介して加熱体を押し当て、前記第1の線材及び前記第2の線材を加圧及び加熱し前記半田を溶融させ、
前記第1の線材及び前記第2の線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する接続構造体の製造方法。 - 保持基台にテープ状の第1の線材の端部とテープ状の第2の線材の端部とが互いに対向するように第1の線材と第2の線材とを配置し、
前記第1の線材と前記第2の線材とを跨ぐように半田を配置し、
前記半田の上に接続用線材を配置し、
前記第1の線材、前記第2の線材、及び前記接続用線材に加圧板を介して加熱体を押し当て、前記第1の線材、前記第2の線材、及び前記接続用線材を加圧及び加熱し前記半田を溶融させ、
前記第1の線材、前記第2の線材、及び前記接続用線材を前記加圧板により加圧した状態を保持し、前記加熱体を前記加圧板から離間させ、前記加圧板を冷却し前記半田を凝固させ前記第1の線材と前記第2の線材とを接続する接続構造体の製造方法。 - 前記第1の線材及び前記第2の線材が、超電導線材である請求項9又は10に記載の接続構造体の製造方法。
- 前記第1の線材、前記第2の線材、及び前記接続用線材が超電導線材である請求項10に記載の接続構造体の製造方法。
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JP2020145010A (ja) * | 2019-03-05 | 2020-09-10 | 東芝Itコントロールシステム株式会社 | 導体接合治具 |
JP7148439B2 (ja) | 2019-03-05 | 2022-10-05 | 東芝Itコントロールシステム株式会社 | 導体接合治具 |
KR20220098514A (ko) * | 2021-01-04 | 2022-07-12 | 장성기 | 플렉시블 플랫 케이블의 도체 도금 준비용 연결장치 |
KR102588882B1 (ko) * | 2021-01-04 | 2023-10-16 | 장성기 | 플렉시블 플랫 케이블의 도체 도금 준비용 연결장치 |
Also Published As
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US20170117688A1 (en) | 2017-04-27 |
EP3007287A1 (en) | 2016-04-13 |
US10014671B2 (en) | 2018-07-03 |
EP3007287A4 (en) | 2017-08-09 |
US9685769B2 (en) | 2017-06-20 |
EP3285341B1 (en) | 2019-05-22 |
US20170117689A1 (en) | 2017-04-27 |
EP3285341A1 (en) | 2018-02-21 |
EP3007287B1 (en) | 2019-05-22 |
US10044176B2 (en) | 2018-08-07 |
US20160105005A1 (en) | 2016-04-14 |
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