CN110869142A - Electromagnetic forming coil unit and method for manufacturing formed body using same - Google Patents

Electromagnetic forming coil unit and method for manufacturing formed body using same Download PDF

Info

Publication number
CN110869142A
CN110869142A CN201880042387.3A CN201880042387A CN110869142A CN 110869142 A CN110869142 A CN 110869142A CN 201880042387 A CN201880042387 A CN 201880042387A CN 110869142 A CN110869142 A CN 110869142A
Authority
CN
China
Prior art keywords
electromagnetic forming
coil
conductor
coil unit
tubular member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201880042387.3A
Other languages
Chinese (zh)
Other versions
CN110869142B (en
Inventor
今村美速
杉崎孝良
今井智惠子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018021085A external-priority patent/JP6469908B2/en
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of CN110869142A publication Critical patent/CN110869142A/en
Application granted granted Critical
Publication of CN110869142B publication Critical patent/CN110869142B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures

Abstract

Provided are an electromagnetic forming coil unit and a method for manufacturing a formed body using the electromagnetic forming coil unit, wherein the electromagnetic forming coil unit can prevent a tubular member from contacting a conductor or conductors from contacting each other when a current is applied to the tubular member, and can stably process a plurality of positions in the longitudinal direction of the tubular member. The electromagnetic forming coil unit includes: a resin shaft core member; a conductor having a winding portion wound around the shaft core member and a pair of conductor extension portions; an insulating support; and a resin coating layer formed on the outer peripheral surface of the winding portion. The insulating support is formed with conductor holding portions for holding the conductor extending portions so as to be separated from each other in the longitudinal direction.

Description

Electromagnetic forming coil unit and method for manufacturing formed body using same
Technical Field
The present invention relates to an electromagnetically molded coil unit and a method for manufacturing a molded body using the electromagnetically molded coil unit.
Background
Structural members of automobiles are often made of steel from the viewpoint of cost and workability such as welding. In view of recent demand for improvement in fuel efficiency, it has been studied to replace a part of an automobile structural member made of a steel member with a lightweight member and apply such a lightweight member to a frame member in addition to a plate member.
As such a lightweight member, an aluminum alloy is preferably used. However, in the case of mounting a bracket or the like to a lightweight member, it has been studied to use fixing by caulking for joining to an object-side member such as a bracket in order to suppress thermal deformation at the time of welding the bracket. As the fixing method by caulking, a method using electromagnetic forming is proposed (patent document 1). Further, a method of partially forming a long tubular member by applying electromagnetic forming is proposed (patent document 2).
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2004-237348
Patent document 2: japanese laid-open patent publication No. 6-312226
Disclosure of Invention
Problems to be solved by the invention
Since such fixing by caulking does not cause thermal strain, a structure with higher accuracy can be obtained as compared with a construction method by welding. However, the frame member, the reinforcement, or the like has a feature that the overall length is longer than the diameter, and the diameter varies in the axial direction. In patent documents 1 and 2, the pipe is expanded and formed over a part of the entire length of the aluminum pipe or in the vicinity of the end portion thereof, but in the case of a member whose shape changes in the axial direction, it is necessary to rivet and form a plurality of portions in the axial direction, and it is difficult to apply the electromagnetic forming coil described in conventional document 1.
On the other hand, according to the electromagnetic forming coil described in prior document 2, it is possible to perform electromagnetic expansion at a plurality of sites by moving the coil portion to a predetermined site. However, no consideration is made as to the arrangement of the conductors extending from the end portions of the coil portions.
In electromagnetic forming, a tubular member to be formed is arranged in the vicinity of a coil portion (inductor), and energy charged in a capacitor is applied to the coil portion as a pulsed large current in a very short time within several ms. The pulse-like large current flows not only into the wound portion of the conductor in the coil portion but also into a pair of conductors extending from the end portions of the coil portion. Therefore, when the electromagnetic forming is energized, the conductor extension portion also moves by the electromagnetic force generated by itself, and there is a possibility that the conductor and the tubular member contact each other or the conductors contact each other. Therefore, damage (caused by short circuit or spark) to the tubular member or the coil portion or damage to the power supply device may occur, and stable production may not be possible.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electromagnetic forming coil unit and a method of manufacturing a formed body using the electromagnetic forming coil unit, which can prevent a tubular member from being in contact with a conductor or conductors from being in contact with each other when a current is applied to the tubular member, and can stably process a plurality of portions in the longitudinal direction of the tubular member.
Means for solving the problems
The present invention includes the following structure.
(1) An electromagnetic forming coil unit which is formed in a longitudinal direction from a base end to a tip end, is inserted into a tube of a tubular member from the tip end side, and expands the tubular member by an electromagnetic force, the electromagnetic forming coil unit comprising:
a resin shaft core member;
a conductor having a winding portion wound around the shaft core member and a pair of conductor extension portions extending from the winding portion to the base end side;
an insulating support body provided along the longitudinal direction at least one end of the axial direction of the shaft core member; and
a resin coating layer covering an outer peripheral surface of the winding portion of the conductor,
a conductor holding portion that holds the pair of conductor extending portions so as to be separated from each other is formed in the insulating support body along the longitudinal direction.
According to this electromagnetic forming coil unit, even if the tubular member is elongated, it is possible to stably process any position in the longitudinal direction of the tubular member while preventing the tubular member from contacting the conductor or the conductors from contacting each other when energized.
(2) An electromagnetic forming coil unit that is formed in a longitudinal direction from a base end toward a tip end, is inserted into a tube of a tubular member from the tip end side, and expands the tubular member by an electromagnetic force, wherein a plurality of coil portions are arranged in the longitudinal direction so as to be separated from each other, the coil portions comprising:
a resin shaft core member;
a conductor having a winding portion wound around the shaft core member and a pair of conductor extension portions extending from the winding portion to the base end side;
a resin coating layer covering an outer peripheral surface of the winding portion of the conductor,
an insulating support body provided along the longitudinal direction between the plurality of coil portions and between an end portion on the base end side of the axial core member of the coil portion disposed closest to the base end side and the base end,
a conductor holding portion that holds the pair of conductor extending portions so as to be separated from each other is formed in the insulating support body along the longitudinal direction.
According to this electromagnetic forming coil unit, even if the tubular member is elongated, the tubular member can be prevented from contacting the conductor or from contacting the conductor with each other when energized, and the tubular member can be expanded at a time at a plurality of positions in the longitudinal direction.
(3) The electromagnetic forming coil unit according to (1) or (2), wherein the conductor is a tubular member.
According to this electromagnetic forming coil unit, the coil that generates heat by energization can be cooled by flowing the cooling medium into the pipe of the conductor.
(4) The electromagnetically formed coil unit as claimed in (3), wherein a terminal is connected to an end portion of the conductor extension portion on the base end side.
According to this electromagnetic forming coil unit, the terminals can be easily connected to and disconnected from the terminals on the connection target side, and the handling property of the electromagnetic forming coil unit can be improved. Thus, the electromagnetic forming coil unit can be easily replaced and installed in another processing station or a new electromagnetic forming coil unit can be installed.
(5) The electromagnetic forming coil unit according to (4), wherein the terminal is a plate-shaped terminal.
According to this electromagnetic forming coil unit, since the terminals are plate-shaped terminals, the terminals can be connected in surface contact with the terminals on the connection target side, and short circuits, sparks, and the like are less likely to occur.
(6) The electromagnetically formed coil unit as claimed in (5), wherein the conductor extension portion is formed to extend from the insulating support body to the base end side, and the terminal is formed to extend in the longitudinal direction.
According to the electromagnetically formed coil unit, the terminal is formed so as to extend in the longitudinal direction of the electromagnetically formed coil unit, and thus the contactable range with the terminal on the connection target side can be increased. Therefore, even when the electromagnetic forming coil unit is moved, the terminals on the connection target side do not need to be moved in accordance with the movement, and the terminals can be brought into contact with each other.
(7) The electromagnetically formed coil unit as claimed in (5), wherein the conductor extending portion is formed to extend from the insulating support body to the base end side, and the terminals are arranged at a plurality of positions in the longitudinal direction, respectively.
According to this electromagnetic forming coil unit, the terminals are arranged at a plurality of positions along the longitudinal direction of the electromagnetic forming coil unit, so that the terminals on the connection target side can be brought into contact with the respective terminals by the movement of the electromagnetic forming coil unit. Thus, the terminals on the side to be connected are arranged at predetermined positions in the longitudinal direction of the electromagnetic forming coil unit, and the electromagnetic forming coil unit is moved so that the terminals at the respective positions come into contact with the terminals on the side to be connected, whereby the electromagnetic forming at different forming positions can be easily realized.
(8) The method for manufacturing a molded body using the electromagnetic molding coil unit according to (1) is characterized in that the following steps are sequentially performed:
a pipe member arrangement step of arranging the pipe member at a processing position;
a coil arranging step of inserting the electromagnetic forming coil unit into a tube of the tubular member and arranging the wound portion of the conductor at an expanded position of the tubular member; and
and a pipe expanding step of expanding the tubular member at the expanded position by an electromagnetic force generated by applying current to the conductor of the electromagnetic forming coil unit.
According to the method for manufacturing the molded body, it is possible to expand any position to be expanded of the tubular member by the electromagnetic forming coil unit.
(9) A method for manufacturing a molded body using the electromagnetically molded coil unit described in (2), the method comprising the steps of:
a pipe member arrangement step of arranging the pipe member at a processing position;
a coil arranging step of inserting the electromagnetic forming coil unit into a tube of the tubular member and arranging the wound portions of the conductor at different expanded positions of the tubular member; and
and a pipe expanding step of expanding the tubular member at the expanded position by electromagnetic force generated by applying current to the conductor of the electromagnetic forming coil unit.
According to the method for manufacturing the molded body, the pipe can be expanded at a time at a plurality of pipe expansion positions, and the tact time can be shortened.
(10) The method of manufacturing a molded body according to (8) or (9), wherein the pipe member arranging step includes a step of arranging a rigid member that circumferentially surrounds the tubular member on an outer periphery of the expanded position of the tubular member.
According to the method for manufacturing the molded body, the tubular member can be riveted to the rigid member.
(11) The method of manufacturing a molded body according to (8) or (9), wherein after the pipe expanding step, the electromagnetic molding coil unit is moved in the longitudinal direction so that the winding portion of the conductor is arranged at a next pipe expanding position different from the pipe expanding position, and the pipe expanding step is performed again.
According to this method for manufacturing a molded body, since a plurality of portions can be expanded using the same electromagnetic forming coil portion, an increase in the number of electromagnetic forming coil portions due to an increase in the number of expanded portions can be suppressed.
(12) The method of manufacturing a molded body according to (10), wherein the pipe member arranging step includes a step of arranging a rigid member that circumferentially surrounds the tubular member on an outer periphery of the expanded position of the tubular member.
According to this method for manufacturing a molded body, the tubular member can be expanded radially outward over the entire circumference and brought into contact with the rigid member, and can be uniformly caulked in the circumferential direction.
(13) The method of manufacturing a molded body according to (11) or (12), wherein in the coil arranging step, the electromagnetic molding coil units are inserted from both ends in an axial direction of the tubular member, respectively.
According to this method for manufacturing a molded body, the electromagnetic forming coil portions of the electromagnetic forming unit can be inserted from both ends in the axial direction of the tubular member, and the pipe expanding stroke can be shortened as compared with the case where the coil portions are inserted from one side in the axial direction of the tubular member. In addition, the overall length of the electromagnetic forming coil portion can be shortened, and the positioning accuracy can be improved.
Effects of the invention
According to the present invention, even if the tubular member is elongated, it is possible to stably process a plurality of portions in the longitudinal direction of the tubular member while preventing the tubular member from contacting the conductor or the conductors from contacting each other when energized. This makes it possible to obtain a tubular member having a diameter increased by electromagnetic forming without causing damage.
Drawings
Fig. 1 is an external perspective view schematically showing a molded body obtained by electromagnetic molding.
Fig. 2 is a schematic plan view of an electromagnetic forming apparatus according to a first structural example.
Fig. 3 is a perspective view of the clamp plate.
Fig. 4 is a schematic configuration diagram of an electromagnetic forming coil unit of a first configuration example.
Fig. 5 is a structural view schematically showing a single structure of a conductor.
Fig. 6 is a cross-sectional view taken along line VI-VI of the conductor shown in fig. 5.
Fig. 7 is a partially exploded perspective view of the insulating support.
Fig. 8 is a perspective view showing a coil-side terminal support portion disposed on the base end side of the insulating support.
Fig. 9 is an enlarged perspective view of the coil-side terminal.
Fig. 10 is a cross-sectional view schematically showing a state in which the coil-side terminal support portion shown in fig. 8 is sandwiched between the support base and the pressing member.
Fig. 11A is an explanatory view showing a pipe inserting process of inserting an aluminum pipe member into a support member of a jig plate in stages.
Fig. 11B is an explanatory view showing a pipe inserting process of inserting an aluminum pipe member into a support member of a jig plate in stages.
Fig. 12A is an explanatory view showing a coil arranging step and a pipe expanding step in stages.
Fig. 12B is an explanatory view showing the coil arranging step and the pipe expanding step in stages.
Fig. 12C is an explanatory view showing the coil arranging step and the pipe expanding step in stages.
Fig. 13A is a sectional view of the aluminum pipe member before electromagnetic forming.
Fig. 13B is a sectional view after the electromagnetic forming of the aluminum pipe member.
Fig. 14 is a schematic configuration diagram of an electromagnetic forming coil unit of a second configuration example.
Fig. 15A is a cross-sectional view of the XVA-XVA line of the insulating support shown in fig. 14.
Fig. 15B is a cross-sectional view taken along line XVB-XVB of the insulating support shown in fig. 14.
Fig. 16 is a plan view showing a coil-side terminal support part of a second configuration example.
Fig. 17 is a cross-sectional view schematically showing a state in which the coil-side terminal support portion shown in fig. 16 is sandwiched between the support base and the pressing member.
Fig. 18A is an explanatory view showing a step of a pipe expanding process of inserting an electromagnetically formed coil portion into an aluminum pipe member supported by a jig plate to expand the pipe in an electromagnetically forming apparatus including an electromagnetically formed coil unit according to a second configuration example.
Fig. 18B is an explanatory view showing a step of a pipe expanding process of inserting the electromagnetic forming coil portion into the aluminum pipe member supported by the jig plate to expand the pipe in the electromagnetic forming apparatus including the electromagnetic forming coil unit according to the second configuration example.
Fig. 19 is a cross-sectional view showing a modification of the insulating support.
Fig. 20 is a divided perspective view of the insulating support having the relay portion.
Fig. 21 is a schematic configuration diagram of an electromagnetic forming coil unit of a third configuration example.
Fig. 22 is a process explanatory view schematically showing a pipe expanding process performed by the electromagnetic forming coil unit.
Fig. 23 is a process explanatory view schematically showing a pipe expanding process performed by the electromagnetic forming coil unit.
Fig. 24 is a schematic configuration diagram showing a case where a power source side terminal and a coil side terminal using a plate-shaped electrode terminal are in contact with each other.
Fig. 25 is a schematic configuration diagram showing a case where a power source side terminal and a coil side terminal using a disk-shaped electrode terminal are in contact with each other.
Fig. 26 is a schematic configuration diagram showing another configuration example of the electromagnetic forming coil unit.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
< Structure of molded body >
Fig. 1 is an external perspective view schematically showing a molded body obtained by electromagnetic molding.
The formed body 11 has an aluminum pipe member 13, brackets 15, 17 provided on the outer periphery of the aluminum pipe member 13, and brackets 19A, 19B provided at both ends of the aluminum pipe member 13. Through holes 59 are formed in the brackets 15, 17, 19A, and 19B, respectively. The aluminum pipe member 13 is fixed in a state inserted through each through hole 59.
The aluminum pipe member 13 is not limited to a round pipe, and may be a square pipe having a square or rectangular cross section, a hexagonal pipe having a hexagonal cross section, or an octagonal pipe having an octagonal cross section, and may be manufactured by extrusion molding or welding of plate materials. The aluminum pipe member 13 is preferably made of an aluminum alloy (JIS6000 series, 7000 series, etc.).
The brackets 15, 17, 19A, 19B (hereinafter, also collectively referred to as brackets) are rigid members integrally configured with the aluminum pipe member 13. The material of the bracket may be steel, an aluminum extrusion material, an aluminum casting, a resin injection molding material, or the like.
< first structural example of electromagnetic Forming apparatus >
Next, the structure of an electromagnetic forming apparatus for manufacturing a formed body 11 in which a bracket is caulked to the outer periphery of an aluminum pipe member 13 by electromagnetic forming will be described.
Fig. 2 is a schematic plan view of an electromagnetic forming apparatus 100 according to a first configuration example.
The electromagnetic forming apparatus 100 includes a plurality of jig plates 31, a jig plate conveyance mechanism 33, a tube insertion mechanism 35, a first coil unit 30A and a second coil unit 30B, a first coil movement mechanism 37A and a second coil movement mechanism 37B, and current supply portions 39A and 39B.
The electromagnetic forming apparatus 100 has a tube inserting station ST1 and a tube expanding station ST 2. At the tube inserting station ST1, the aluminum pipe member 13 is transferred to the jig plate 31 by the tube inserting mechanism 35. The jig plate conveyance mechanism 33 conveys the jig plate 31 after the insertion of the aluminum pipe member 13 from the pipe insertion station ST1 to the pipe expansion station ST 2.
At the tube expanding station ST2, the first coil unit 30A is inserted into the tube of the aluminum pipe member 13 supported on the jig plate 31 by the first coil moving mechanism 37A. Further, the second coil unit 30B is inserted into the tube of the aluminum pipe member 13 supported by the jig plate 31 by the second coil moving mechanism 37B. Then, the first electromagnetic forming coil portion 29A of the first coil unit 30A is energized by the current supply portion 39A, and the second electromagnetic forming coil portion 29B of the second coil unit 30B is energized by the current supply portion 39B. Thereby expanding the aluminum pipe member 13 by the electromagnetic forming.
< Clamp plate >
Fig. 3 is a perspective view of the jig plate 31. Also shown in this figure are an aluminum tube member 13 and various brackets 15, 17, 19A, 19B fixed to the aluminum tube member 13. The aluminum tubular member 13 is shown in broken lines in the figure.
The jig plate 31 includes a substrate 41, and bracket holders 51, 53, 55, 57 fixed to the substrate 41.
The substrate 41 is made of a single piece of steel. In addition, the material may be an aluminum alloy or a resin material other than steel. In the case of a resin material, a fiber-reinforced plastic such as a carbon fiber-reinforced plastic (CFRP) may be used.
The bracket holder 51 holds the bracket 19A and constitutes the support member 43 together with the bracket 19A. Similarly, the bracket holder 53 holds the bracket 17 to form the support member 45, the bracket holder 55 holds the bracket 15 to form the support member 47, and the bracket holder 57 holds the bracket 19B to form the support member 49. The respective bracket holders 51, 53, 55, 57 are fastened and fixed with various brackets from the radial outside by toggle clamps or the like, not shown.
Through holes 59 through which the aluminum pipe member 13 is inserted are coaxially arranged in the respective brackets 15, 17, 19A, 19B fixed to the bracket holders 51, 53, 55, 57. That is, all the through holes 59 are coaxially arranged in the support members 43, 45, 47, 49 provided upright on the jig plate 31, and each through hole 59 guides the aluminum pipe member 13 when the aluminum pipe member 13 is inserted.
However, as in the aluminum pipe member 13 of the present configuration, in order to hold the long member having an axial length longer than a diameter in a state of less bending, the jig plate 31 itself needs to have high rigidity. Therefore, a steel plate having high rigidity is preferably used for the substrate 41 of the jig plate 31.
Further, due to the energization of the electromagnetic forming coil portions (the first electromagnetic forming coil portion 29A and the second electromagnetic forming coil portion 29B in fig. 2), an induced current generated in the aluminum pipe member 13 may be conducted to the substrate 41 of the jig plate 31 via the supporting members 43, 45, 47, and 49. Therefore, it is preferable to provide an insulating layer having electrical insulation on the substrate 41 of the jig plate 31. As the insulating layer, for example, phenol resin (Bakelite (registered trademark)) or the like can be applied.
By providing the insulating layer on the substrate 41, an induced current necessary for electromagnetic forming does not flow out, and the amount of electromagnetic forming of the aluminum pipe member 13 can be secured. The insulating layer is preferably provided on the entire lower surface of the substrate 41 of the chucking plate 31, and can more reliably block conduction of the induced current. In addition, in contrast to the case of being provided on the upper surface of the substrate 41, there is no positional deviation of the support members 43, 45, 47, 49 due to the thickness distribution of the insulating layer. Therefore, the aluminum pipe member 13 can be supported in a highly accurately positioned state.
< pipe insertion mechanism >
A base 67 is provided on one end side of the jig plate 31 of the tube inserting station ST1 shown in fig. 2. The tube insertion mechanism 35 is disposed on the base 67. The pipe inserting mechanism 35 moves the aluminum pipe member 13 in the axial direction toward the clamp plate 31. The pipe inserting mechanism 35 thereby inserts the aluminum pipe member 13 into each of the through holes 59 of the support members 43, 45, 47, 49.
Here, the substrate 41 and the susceptor 67 placed on the jig plate 31 of the jig plate conveying mechanism 33 are arranged such that their upper surfaces are parallel to each other. Therefore, when the pipe is inserted, the aluminum pipe member 13 is coaxially held with high accuracy and inserted into the through hole 59 of the support members 43, 45, 47, 49 on the jig plate 31 (see fig. 1). Further, since each through hole 59 functions as a guide hole for guiding the aluminum pipe member 13, occurrence of core displacement can be prevented.
< coil Unit >
The first coil unit 30A and the second coil unit 30B are disposed on both sides with the jig plates 31 in the expanding station ST2 interposed therebetween. The first electromagnetic forming coil portion 29A is disposed at the tip of the first coil unit 30A, and the second electromagnetic forming coil portion 29B is disposed at the tip of the second coil unit 30B.
Fig. 4 is a schematic configuration diagram of an electromagnetic forming coil unit of a first configuration example.
The first coil unit 30A and the second coil unit 30B have the same configuration except that the overall length in the longitudinal direction is different, and therefore will be referred to as an electromagnetic forming coil unit 30 in the following description of fig. 4 to 10. The electromagnetic forming coil unit 30 is provided in the longitudinal direction from the base end 111 toward the tip end 113, and is inserted into the tube of a tubular member (the aluminum tube member 13 in fig. 2) from the tip end 113 side to expand the tubular member.
The electromagnetic forming coil unit 30 includes: a resin-made shaft core member 115 having a cylindrical shape; an insulating support 117 provided along the longitudinal direction at one end 115a of the shaft core member 115 on the base end 111 side and having electrical insulation properties; a conductor 123 having a coil portion formed on the axial core member 115; and a coil-side terminal support portion 135 in which coil-side terminals (terminals) 119 and 121 are arranged, the coil- side terminals 119 and 121 being provided on the base end 111 side and connected to the conductor 123.
The conductor 123 has a winding portion 123a wound around the shaft core member 115 and a pair of conductor extension portions 123b, 123c extending from the winding portion 123a toward the base end 111 side. More specifically, the conductor extension portion 123b extends from the starting end (the distal end 113 side) of the winding portion 123a toward the inside of the shaft core member 115, and the conductor extension portion 123c extends from the distal end (the one end 115a on the proximal end 111 side of the shaft core member 115) of the winding portion 123 a.
An electrically insulating resin coating layer 125 is provided on the outer peripheral surface of the wound portion 123a of the conductor 123 so as to cover the conductor 123. Resin coating layer 125 is formed by winding a glass fiber tape around the surface of conductor 123 and around the outer periphery of axial core member 115, and impregnating the wound tape of conductor 123 with resin. Thus, resin coating layer 125 is provided not only on the outer periphery of winding portion 123a but also between adjacent conductors 123 of winding portion 123a and on the inner periphery of winding portion 123 a. The details of the resin coating layer 125 can be found in japanese patent application laid-open No. 2004-40044.
The first electromagnetic forming coil portion 29A is constituted by the above-described shaft core member 115, the winding portion 123a of the conductor 123 provided on the shaft core member 115, and the resin coating layer 125 (the same applies to the second electromagnetic forming coil portion 29B). That is, the first electromagnetic formed coil portion 29A is a region of the winding portion 123a of the conductor 123 in the longitudinal direction of the electromagnetic formed coil unit 30, and the same applies to other coil portions such as the second electromagnetic formed coil portion 29B.
Fig. 5 is a structural view schematically showing a single structure of the conductor 123, and fig. 6 is a cross-sectional view taken along line VI-VI of the conductor 123 shown in fig. 5.
The conductor 123 is a tubular wire (hollow conductor) having a substantially square axial cross-sectional shape and a communication hole 128 formed at the center thereof. The communication hole 128 is formed over the entire length of the conductor 123. The coil- side terminals 119 and 121 are connected to the ends of the conductor extensions 123b and 123 c. The pump P for supplying the cooling medium is connected to the communication holes 128 of the conductor extensions 123b and 123c via the coil side terminals 119 and 121. Air, nitrogen, argon, helium, or the like is used as the cooling medium, and the coiled portion 123a, the conductor extension portions 123b, 123c, and the like that generate heat when energized are cooled by supplying the cooling medium to the communication hole 128.
Fig. 7 is a partially exploded perspective view of the insulating support 117.
The insulating support 117 is disposed between the shaft core member 115 shown in fig. 4 and the terminal connection portion 61 where the coil side terminals 119 and 121 are disposed, which is between the base ends 111. The insulating support 117 may be formed integrally with the shaft core member 115, or may be formed separately from the shaft core member 115 and dividable from the shaft core member 115. The insulating support 117 shown in the figure is a columnar member formed separately from the axial core member 115, and is formed of a pair of divided pieces 131A and 131B having a semicircular cross section orthogonal to the axial direction.
A pair of grooves (conductor holding portions) 127 and 129 for holding (fixing) the pair of conductor extending portions 123b and 123c at a constant interval from each other in the longitudinal direction of the insulating support 117 are formed on the division opposing surface 126A of the one division piece 131A. The split opposing surface 126B of the other split piece 131B opposing the grooves 127, 129 may be a flat surface, or a pair of the same grooves may be formed at opposing positions.
Fig. 8 is a perspective view showing the coil-side terminal support portion 135 disposed on the base end 111 (see fig. 4) side of the insulating support 117.
A flat plate-shaped coil-side terminal support portion 135 is provided on the base end 111 of the insulating support 117. The coil-side terminal support portion 135 may be formed integrally with the insulating support 117, or may be a plate attached separately from the insulating support 117.
The coil-side terminal support portion 135 of the present configuration has a stepped structure having different projection lengths in the longitudinal direction of the insulating support 117. The coil side terminal 119 is disposed on the longer side and the coil side terminal 121 is disposed on the shorter side of the projection length of the stepped structure. The coil- side terminals 119 and 121 are each formed of a plate-like metal piece, and are fixed to the coil-side terminal support 135 so as to be separated from each other.
Fig. 9 is an enlarged perspective view of the coil side terminals 119 and 121.
The coil side terminals 119 and 121 have conductor fixing holes 137 formed therethrough. The end of the conductor extension 123b is inserted into the conductor fixing hole 137 of the coil side terminal 119. Further, the end of the conductor extension 123c is inserted into the conductor fixing hole 137 of the coil side terminal 121. The conductor extensions 123b, 123c are fixed to the coil- side terminals 119, 121 by soldering or the like, respectively.
That is, in the conductor 123 of the present configuration, the conductor extending portions 123B, 123c are provided between the coil portions (the first electromagnetic forming coil portion 29A, the second electromagnetic forming coil portion 29B) on the side of the distal end 113 of the electromagnetic forming coil unit 30 shown in fig. 4 and the proximal end 111, and are connected to the coil side terminals 119, 121 at the distal ends of the conductor extending portions 123B, 123c on the side of the proximal end 111.
Fig. 10 is a cross-sectional view schematically showing a state in which the coil-side terminal support section 135 shown in fig. 8 is sandwiched between the support base 143 and the pressing member 149.
The coil-side terminal support portion 135 is sandwiched by the terminal connection portion 61. The terminal connecting portion 61 is provided with: a support base 143 having a support surface 143a for supporting the lower side of the coil-side terminal support portion 135; a pressing member 149 disposed above the support base 143 so as to face the coil- side terminals 119 and 121; and a not-shown clamp portion that sandwiches the coil-side terminal support portion 135 between the pressing member 149 and the support base 143.
The pressing member 149 fixes the power source side terminals 145 and 147 for current supply. The power source side terminals 145 and 147 are disposed apart from each other in a state where the lower surface side which becomes a flat surface is exposed from the pressing member 149. The pressing member 149 is clamped to the support base 143 by a clamp not shown, and the power supply side terminal 145, the coil side terminal 119, and the power supply side terminal 147, and the coil side terminal 121 are pressed against each other to be electrically connected.
< coil moving mechanism >
The coil moving mechanism is explained next.
Bases 69A and 69B are provided on both sides of the clamp plate 31 at the pipe expanding station ST2 shown in fig. 2. A first coil moving mechanism 37A for supporting the first coil unit 30A is disposed on the base 69A, and a second coil moving mechanism 37B for supporting the second coil unit 30B is disposed on the base 69B.
The first coil moving mechanism 37A includes a driving portion, not shown, such as a clamping portion 38A made of an electrically insulating material and a ball spline, which grips the first coil unit 30A. The driving unit drives the first coil unit 30A to advance and retreat in the axial direction. Similarly, the second coil moving mechanism 37B includes a holding portion 38B made of an electrically insulating material for holding the second coil unit 30B, and the driving portion, not shown, for driving the second coil unit 30B to be movable forward and backward in the axial direction.
The first coil moving mechanism 37A inserts the first coil unit 30A into the tube of the aluminum tube member 13 coaxially with the aluminum tube member 13. In addition, the second coil moving mechanism 37B inserts the second coil unit 30B into the tube of the aluminum tube member 13 so as to be coaxial with the aluminum tube member 13. The insertion operation of the first coil unit 30A and the second coil unit 30B may be performed simultaneously, or the insertion timings may be shifted from each other.
The first and second electromagnetic forming coil portions 29A and 29B are arranged at desired pipe expanding positions by the movement of the first coil unit 30A by the first coil moving mechanism 37A and the movement of the second coil unit 30B by the second coil moving mechanism 37B.
< Current supply part >
The current supply unit 39A includes a terminal connection unit 61A, a power supply unit 63A, and a high-voltage power cable 65A. The terminal connection portion 61A supplies a current for electromagnetic forming to the first electromagnetic forming coil portion 29A, and is connected to the coil side terminals 119 and 121 (see fig. 4) provided on the base end side of the first coil unit 30A. The high-voltage power supply cable 65A connects the power supply portion 63A and the terminal connection portion 61A. The current supply unit 39B includes a terminal connection unit 61B, a power supply unit 63B, and a high-voltage power cable 65B. The terminal connection portion 61B supplies a current for electromagnetic forming to the second electromagnetic forming coil portion 29B, and is connected to coil side terminals 119, 121 provided on the base end side of the second coil unit 30B. The high-voltage power supply cable 65B connects the power supply portion 63B to the terminal connection portion 61B.
The power supply units 63A and 63B output the energy charged in the capacitors as a pulse-like large current in a very short time within several ms via the switches. The output pulse current is supplied to the first electromagnetic forming coil portion 29A and the second electromagnetic forming coil portion 29B via the high-voltage power supply cables 65A and 65B.
As the switch, a gap switch, a thyristor switch, a mechanical switch, a semiconductor switch, an ignition switch, or the like can be used.
< Clamp plate conveying mechanism >
The jig plate conveying mechanism 33 includes a pair of conveying rails 34, and a conveying belt (not shown) disposed along the conveying rails 34 and having a conveying chain looped around. The conveying belt carries the gripper plate 31, and the gripper plate 31 is conveyed along the conveying rail 34 by driving of the conveying chain. That is, the clamp plate conveying mechanism 33 conveys the clamp plate 31 from the tube inserting station ST1 to the tube expanding station ST2 along the conveying rail 34.
The jig plate conveying mechanism 33 can adopt a plurality of conveying methods such as a belt conveying method and a walking beam method in addition to the above-described methods. From the viewpoint of saving the facility space and shortening the tact time, it is preferable that the tube inserting station ST1 and the tube expanding station ST2 be aligned in parallel in the tube inserting direction and the advancing/retreating direction (axial direction) of the coil unit. Further, the jig plate 31 is preferably conveyed in a direction orthogonal to the axial direction.
< electromagnetic Forming Process for aluminum pipe Member >
Next, the respective steps of the method for manufacturing a formed body of the aluminum pipe member 13 shown in fig. 1 by electromagnetic forming by the electromagnetic forming apparatus 100 having the above-described configuration will be described in order.
Fig. 11A and 11B are explanatory views showing a tube inserting step of inserting the aluminum tube member 13 into the support members 43, 45, 47, and 49 of the jig plate in stages.
First, the aluminum pipe member 13 is prepared, and the aluminum pipe member 13 is attached to the clamp mechanism provided in the pipe inserting mechanism 35 in the manner shown in fig. 11A.
Further, brackets 19A, 17, 15, and 19B (see fig. 3) are attached to the support members 43, 45, 47, and 49 of the jig plate 31. The various brackets are fixed to the bracket holders 51, 53, 55, 57 so that the through holes 59 are coaxial with each other. That is, the through holes 59 of the aluminum pipe member 13 and the support members 43, 45, 47, 49 are coaxially arranged with the axis Ax as the axis.
(tube inserting step and tube Member disposing step)
Next, by the driving of the tube inserting mechanism 35, the aluminum pipe member 13 is moved toward the jig plate 31 as shown in fig. 11B. Thus, the aluminum pipe member 13 is inserted from the pipe end 13a through the through holes 59 of the support members 49, 47, 45, and 43 in this order, and is disposed at a position where the pipe end 13a protrudes from the through hole 59 of the support member 43. Thus, the support members 43, 45, 47, 49 that circumferentially surround the aluminum pipe member 13 are disposed on the outer periphery of the expanded position of the aluminum pipe member 13.
In this state, the aluminum pipe member 13 is held and positioned in the supporting members 43, 45, 47, 49 in a highly accurate coaxial state with the axis Ax as the axis. The pipe inserting mechanism 35 moves the aluminum pipe member 13 to the jig plate 31 and then retreats to the retreat position shown in fig. 11A.
(coil disposing step, pipe expanding step)
Next, in the tube inserting station ST1 shown in fig. 2, the gripper plate conveying mechanism 33 conveys the gripper plate 31 supporting the aluminum pipe member 13 to the tube expanding station ST2 by the gripper plate conveying mechanism 33 as described above.
At the pipe expanding station ST2, the coil arranging step of inserting the electromagnetic forming coil portions from both axial ends and the pipe expanding step of expanding the aluminum pipe member 13 are performed on the aluminum pipe member 13 supported by the jig plate 31.
Fig. 12A, 12B, and 12C are process explanatory diagrams illustrating the coil arranging process and the tube expanding process in stages.
As shown in fig. 12A, on the jig plate 31 conveyed to the pipe expanding station ST2, the first coil unit 30A supported by the holding portion 38A of the first coil moving mechanism 37A and the second coil unit 30B supported by the holding portion 38B of the second coil moving mechanism 37B are arranged to face each other on the same axis.
Then, as shown in fig. 12B, the first coil moving mechanism 37A and the second coil moving mechanism 37B move the first coil unit 30A and the second coil unit 30B toward the jig plate 31 with respect to each other.
The first electromagnetically formed coil portion 29A provided at the distal end of the first coil unit 30A is disposed at an axial position of the support member 45 as the machining position, and the second electromagnetically formed coil portion 29B provided at the distal end of the second coil unit 30B is disposed at an axial position of the support member 47 as the machining position.
Next, in the state shown in fig. 12B, current is passed to the first electromagnetic forming coil portion 29A and the second electromagnetic forming coil portion 29B by the current supply portions 39A and 39B (see fig. 2). Thereby, at the position of the support member 45 and the position of the support member 47, the aluminum pipe member 13 is expanded by electromagnetic forming, and the aluminum pipe member 13 is swaged to the support members 45, 47 by expansion.
Further, as shown in fig. 12C, the first coil unit 30A is moved in the axial direction by the first coil moving mechanism 37A, and the first electromagnetic forming coil portion 29A is arranged at the axial position of the support member 43 as the machining position. The second coil unit 30B is moved in the axial direction by the second coil moving mechanism 37B, and the second electromagnetic forming coil portion 29B is arranged at the axial position of the support member 49 as the machining position.
In this state, current is supplied to the first electromagnetic forming coil portion 29A and the second electromagnetic forming coil portion 29B by the current supply portions 39A and 39B (see fig. 2). Thereby, the aluminum pipe member 13 is expanded by electromagnetic forming at the positions of the support members 43, 49, and is caulked to the support members 43, 49.
Through the above steps, the aluminum pipe member 13 is swaged to the brackets 15, 17, 19A, 19B (see fig. 3).
Fig. 13A is a sectional view before the electromagnetic forming of the aluminum pipe member 13, and fig. 13B is a sectional view after the electromagnetic forming of the aluminum pipe member 13.
The electromagnetically formed aluminum pipe member 13 is expanded at positions where the first and second electromagnetically formed coil portions 29A and 29B are arranged. That is, the aluminum pipe member 13 is expanded by electromagnetic forming and is swaged so as to bulge radially outward over the entire circumference on the axially outer side of the brackets 15, 17, 19A, 19B. This makes it possible to obtain a molded body 11 in the state shown in fig. 1.
After the above-described electromagnetic forming, the formed body 11 to which the various brackets 15, 17, 19A, 19B are caulked and fixed is taken out by releasing the fixing of the bracket holders 51, 53, 55, 57 of the support members 43, 45, 47, 49 shown in fig. 3.
The molded body 11 can be taken out at the expanding station ST2 shown in fig. 2, but the jig plate 31 may be further conveyed by the jig plate conveying mechanism 33 to the front in the conveying direction and may be carried out at the front in the conveying direction compared to the expanding station ST 2.
In the electromagnetic forming apparatus 100 for an aluminum pipe member of this configuration, the first electromagnetic forming coil portion 29A and the second electromagnetic forming coil portion 29B, which are shorter than the entire length of the aluminum pipe member 13, are arranged at desired forming positions, respectively, and the diameter of the aluminum pipe member 13 is increased by electromagnetic forming. Accordingly, compared to the case where the electromagnetic forming coil portion is disposed over the entire length of the aluminum pipe member 13, the current loss flowing through the electromagnetic forming coil portion can be reduced. Therefore, a required amount of current can be passed to a portion where pipe expansion by electromagnetic forming is required, and fluctuation in the amount of electromagnetic forming of the aluminum pipe member 13 can be avoided. Thus, high-precision electromagnetic forming can be realized. Further, the brackets 15, 17, 19A, 19B are firmly caulked to the aluminum pipe member 13 at the respective arrangement positions with high accuracy.
Further, since currents in opposite directions flow through the conductor extending portion 123b and the conductor extending portion 123c during tube expansion, vibrations are generated in the conductor extending portions 123b and 123 c. Due to this vibration, in the case where, for example, the conductor extensions 123b, 123c are in contact with the aluminum pipe member 13 or the conductor extensions 123b, 123c are in contact with each other, a short circuit or a spark is generated between the conductors.
However, the conductor extensions 123b and 123c of the present configuration are held (fixed) by the grooves 127 and 129 (see fig. 7) formed in the insulating support 117 at a constant interval from each other. As a result, even if vibration occurs during energization of electromagnetic forming, the conductor extension portions 123b and 123c do not fly out of the grooves 127 and 129, and short circuit and spark can be reliably prevented from occurring.
In electromagnetic forming, a workpiece to be formed is arranged in the vicinity of the coil portion, and energy for charging the capacitor is supplied to the coil portion via high-voltage power supply cables 65A and 65B (see fig. 2). At this time, if there is a gap between the power supply side terminals 145 and 147 connected to the high- voltage power cables 65A and 65B and the coil side terminals 119 and 121 (see fig. 10), sparks may be generated in the gap, and terminal surfaces may melt or terminals may be joined to each other. In this case, the replacement work of the power source side terminals 145 and 147 or the coil side terminals 119 and 121 of the high-voltage power source cables 65A and 65B occurs, and productivity is lowered.
However, the power supply side terminals 145 and 147 and the coil side terminals 119 and 121 of the present configuration each have a plate-like terminal structure, and both terminals are overlapped with each other to be in a surface contact state. By fixing and energizing the terminals in this surface contact state, the contact between the terminals can be improved and the occurrence of sparks between the terminals can be prevented. Further, since the terminal structure is adopted, the power supply side terminals 145 and 147 and the coil side terminals 119 and 121 can be separated by a simple operation, and the electromagnetic forming coil unit 30 can be conveyed to the next electromagnetic forming step. Therefore, the degree of freedom of the electromagnetic forming process can be improved and productivity can be improved.
< second structural example of electromagnetic forming coil Unit >
Next, a second configuration example of the electromagnetic forming coil unit will be described.
Fig. 14 is a schematic configuration diagram of an electromagnetic forming coil unit 40 of a second configuration example.
In the electromagnetic forming coil unit 40 of the present configuration, the first electromagnetic forming coil portion 29A and the third electromagnetic forming coil portion 29C are arranged at a plurality of locations (two locations in the illustrated example) in the axial direction. In the case where a pair of the electromagnetic forming coil units are used, the second electromagnetic forming coil unit 29B and the fourth electromagnetic forming coil unit 29D in the other electromagnetic forming coil unit have the same configuration as the first electromagnetic forming coil unit 29A and the third electromagnetic forming coil unit 29C, as will be described later in detail.
The first electromagnetic forming coil portion 29A and the third electromagnetic forming coil portion 29C are independent coil portions, and are energized independently. Further, an insulating support 117A is provided between the first electromagnetic shaping coil portion 29A and the third electromagnetic shaping coil portion 29C, and an insulating support 117B is provided between the third electromagnetic shaping coil portion 29C and the base end 11.
Except for the above-described points, the electromagnetic forming coil unit 30 has the same structure as the above-described electromagnetic forming coil unit. In the following description, the same members or portions are denoted by the same reference numerals, and the description thereof is simplified or omitted.
The conductor extending portions 123b and 123C extending from the first electromagnetic shaping coil portion 29A are disposed along the axial center in the insulating support 117A and the axial center member 115 of the third electromagnetic shaping coil portion 29C, respectively. The conductor extending portions 124B and 124C extending from the third electromagnetic shaping coil portion 29C are provided in parallel with the conductor extending portions 123B and 123C in the axial core member 115 and the insulating support 117B of the third electromagnetic shaping coil portion 29C.
In the terminal connection portion 61A, the base end of the conductor extension portion 124b is connected to the coil side terminal 153, and the base end of the conductor extension portion 124c is connected to the coil side terminal 155. The first electromagnetic forming coil portion 29A is formed with a not-shown groove for holding (fixing) the conductor extending portions 123b and 123c to the shaft core member 115. Similarly, in the third electromagnetic forming coil portion 29C, unshown slots for holding (fixing) the conductor extending portions 123b and 123C and the conductor extending portions 124b and 124C, respectively, are formed in the shaft core member 115.
Fig. 15A is a sectional view of the XVA-XVA line of the insulating support 117A shown in fig. 14, and fig. 15B is a sectional view of the XVB-XVB line of the insulating support 117B shown in fig. 14.
In the insulating support 117A shown in fig. 15A, grooves (conductor holding portions) 127 and 129 for holding (fixing) the pair of conductor extending portions 123b and 123c at a constant interval from each other are formed in the longitudinal direction on the division opposing surface 126 of the division piece 131A, similarly to the insulating support 117 (see fig. 7) of the first configuration example.
In the insulating support 117B shown in fig. 15B, grooves (conductor holding portions) 127 and 129 for holding (fixing) a pair of conductor extending portions 123B and 123c are formed in the longitudinal direction on the division opposing surface 126 of the division piece 131A. Further, grooves (conductor holding portions) 157 and 159 for holding (fixing) the pair of conductor extending portions 124b and 124c are formed.
Fig. 16 is a plan view showing the coil-side terminal supporting part 136 of the second configuration example.
The coil-side terminal supporting portions 136 have a stepped structure having different protruding lengths in the longitudinal direction of the insulating support 117B, as in the coil-side terminal supporting portions 135 (see fig. 8) of the first configuration example. The coil side terminals 153 and 119 are disposed on the longer side and the coil side terminals 155 and 121 are disposed on the shorter side of the stepped structure. The coil side terminals 153 and 155 are also made of sheet metal, like the coil side terminals 119 and 121, and are fixed to the coil side terminal support 136 so as to be separated from each other.
Fig. 17 is a cross-sectional view schematically showing the coil-side terminal support 136 shown in fig. 16 sandwiched between the support base 143 and the pressing member 149.
The coil-side terminal supporting portion 136 is sandwiched between the terminal connecting portions 61A, as in the case of the first configuration example. The pressing member 149 fixes the power source side terminals 145, 147, 167, 169. The power source side terminals 145, 147, 167, 169 are disposed apart from each other in a state where the lower surface sides of the flat surfaces are exposed from the pressing member 149. Then, the pressing member 149 is fixed to the support base 143 by a clamp not shown, whereby the power supply side terminals 145 and coil side terminals 119, the power supply side terminals 147 and coil side terminals 121, the power supply side terminals 167 and coil side terminals 153, and the power supply side terminals 169 and coil side terminals 155 are fixed in contact with each other.
Fig. 18A and 18B are explanatory views showing a step of inserting the electromagnetic forming coil portion into the aluminum pipe member 13 supported by the jig plate 31 to perform the pipe expanding process in the electromagnetic forming apparatus 200 including the electromagnetic forming coil unit according to the second configuration example.
The electromagnetic forming apparatus 200 of the present configuration includes, in place of the first coil unit 30A and the second coil unit 30B (see fig. 12A) in the electromagnetic forming apparatus 100 of the first configuration example, third coil units 30C and fourth coil units 30D in which electromagnetic forming coil portions are arranged at a plurality of locations (two locations in the illustrated example) in the axial direction. The other points are the same as those of the electromagnetic forming apparatus 100 described above.
The third coil unit 30C of this configuration includes the first electromagnetic forming coil portion 29A and the third electromagnetic forming coil portion 29C from the distal end on the jig plate 31 side. The space between the first electromagnetic shaping coil part 29A and the third electromagnetic shaping coil part 29C and the base end side of the third electromagnetic shaping coil part 29C are formed by resin supports. Conductors connected to the coils are embedded in the resin support body.
Similarly, the fourth coil unit 30D includes the second electromagnetic forming coil portion 29B and the fourth electromagnetic forming coil portion 29D from the distal end on the jig plate 31 side. The space between the second electromagnetic shaping coil portion 29B and the fourth electromagnetic shaping coil portion 29D and the base end side of the fourth electromagnetic shaping coil portion 29D are formed by resin supports. Conductors connected to the respective coil portions are embedded in the resin support body.
The distance between the coil centers of the first electromagnetic shaping coil portion 29A and the third electromagnetic shaping coil portion 29C is equal to the distance between the support member 45 and the support member 43, and the distance between the coil centers of the second electromagnetic shaping coil portion 29B and the fourth electromagnetic shaping coil portion 29D is equal to the distance between the support member 47 and the support member 49.
In the electromagnetic forming apparatus 200 of this configuration, as shown from the state shown in fig. 18A to fig. 18B, the third coil unit 30C is moved toward the jig plate 31 side in the axial direction by the first coil moving mechanism 37A, and the fourth coil unit 30D is moved toward the jig plate 31 side in the axial direction by the second coil moving mechanism 37B. When the first electromagnetic forming coil portion 29A is disposed at the axial position of the support member 45 by the movement of the third coil unit 30C, the third electromagnetic forming coil portion 29C is disposed at the axial position of the support member 43. When the second electromagnetic forming coil portion 29B is disposed at the axial position of the support member 47 by the movement of the fourth coil unit 30D, the fourth electromagnetic forming coil portion 29D is disposed at the axial position of the support member 49.
In the state shown in fig. 18B, the electromagnetic forming coil portions 29A, 29B, 29C, and 29D are energized, whereby the aluminum pipe member 13 is expanded once by electromagnetic forming at the axial positions of the support members 43, 45, 47, and 49.
According to the electromagnetic forming apparatus 200 of this configuration, the third coil unit 30C and the fourth coil unit 30D in which the plurality of electromagnetic forming coil units are arranged in series are used, so that it is possible to perform electromagnetic forming at desired pipe expanding positions of a plurality of portions without moving the coils. This can shorten the coil moving time in the pipe expanding step and shorten the tact time. The energization timing of the electromagnetic forming coil portions 29A, 29B, 29C, and 29D may be simultaneous or sequential. In this case, it is also not necessary to move the third coil unit 30C or the fourth coil unit 30D, and therefore the process can be simplified.
As shown in fig. 15B, the conductor extending portions 123B and 123c and the conductor extending portions 124B and 124c are preferably alternately arranged rather than being arranged in sequence. That is, the conductor extending portions are preferably arranged in the order of the conductor extending portions 123c (negative electrode), 124c (negative electrode), 123b (positive electrode), and 124b (positive electrode) in the arrangement direction. According to this configuration, in the case where two sites are electromagnetically formed at the same time, the electromagnetic force generated between the positive electrode and the negative electrode can be reduced by an amount corresponding to one set (the conductor extension portions 123c (negative electrode) and 124b (positive electrode)). In addition, even when the current is sequentially supplied with a time difference, the distance between the positive electrode and the negative electrode can be increased to reduce the electromagnetic force generated in the conductor extension portion. This makes it difficult to generate a short circuit or a spark due to vibration of the conductors 123 and 124.
As shown in fig. 16, the conductor extending portions 123B and 123c and the conductor extending portions 124B and 124c are arranged as described above, and the coil side terminals 119 and 153 and the coil side terminals 121 and 155 are arranged to be shifted in a direction (a longitudinal direction of the insulating support 117B) orthogonal to the arrangement direction. That is, the coil side terminals 119 (positive electrode) and 121 (negative electrode) and the coil side terminals 153 (positive electrode) and 155 (negative electrode) are arranged so that the distance therebetween increases. According to this configuration, short-circuiting or sparking is less likely to occur.
< modification example >
The grooves 127, 129, 157, and 159 of the insulating support 117B shown in fig. 15B have a constant groove depth from the split opposing surface 126, but the groove depth may be changed.
Fig. 19 is a cross-sectional view showing a modification of the insulating support.
The insulating support 117C of the present modification is used in a portion corresponding to the insulating support 117B (see fig. 14), and the grooves 157 and 159 are formed deeper than the grooves 127 and 129. By alternately changing the groove depths in this manner, the distance W between the positive and negative electrodes is increased as compared with the case of arranging at the same groove depth. Thereby, the generated electromagnetic force can be reduced. In this case, the conductor extending portions 123b (positive electrode) and 123c (negative electrode) are connected to the power supply portion 83, and the conductor extending portions 124b (positive electrode) and 124c (negative electrode) are connected to the power supply portion 85. Further, it is preferable that the grooves 157 and 159 having large depths be provided with projections 161 and 163 inserted from the divided piece 131B into the grooves 157 and 159.
The groove formed in the insulating support body is a groove continuous in the axial direction, but a hollow relay portion may be provided in a part in the axial direction.
Fig. 20 is a divided perspective view of the insulating support 117D having the relay section 165.
The relay section 165 has a space having a cross-sectional area larger than the groove cross-sectional area in at least one of the divided pieces 131A and 131B. The relay section 165 is a space for accommodating a coupling member such as a connection terminal when ends of conductors, not shown, inserted into the grooves 129, 159, 127, and 157, respectively, are coupled to each other.
By disposing the relay section 165 at a desired position of the insulating support, the degree of freedom in the arrangement and design of the conductor can be increased.
In the electromagnetic forming coil unit, when the plurality of coil portions are arranged to be separated from each other, all the conductor extending portions need to be concentrated inside the winding diameter of the coil portion in accordance with the relationship with the inner diameter of the tubular member. Therefore, the conductor extensions are spaced narrower from each other, and short-circuiting or sparking between the conductors due to vibration of the conductors is more likely to occur. However, by housing the conductor extension portion in the groove of the insulating support as in this configuration, the conductor interval can be kept constant, and the conductor can be stably held even at a narrow distance. Further, the distance between the plurality of coil portions can be set with high accuracy by the insulating support, and electromagnetic forming can be performed with high dimensional accuracy.
< third structural example of electromagnetic forming apparatus >
Next, a third structural example of the electromagnetic forming coil unit will be described.
Fig. 21 is a schematic configuration diagram of an electromagnetic forming coil unit 50 of a third configuration example.
The electromagnetic forming coil unit 50 of the present configuration includes the above-described shaft core member 115, the insulating support 117, the conductor 123, and the coil-side terminal support portion 135A.
The coil-side terminal support portion 135A is formed to be longer in the axial direction than the electromagnetic forming coil unit 30 (see fig. 4) of the first configuration example, and a pair of long coil- side terminals 119A and 121A are arranged on the long coil-side terminal support portion 135A. The coil side terminals 119A and 121A are formed in a plate shape extending in the longitudinal direction of the electromagnetic forming coil unit 50, and each have an axial length Lc. Further, upper surfaces of the coil side terminals 119A and 121A formed in a flat shape over the entire length of the terminals are exposed.
The electromagnetic forming coil unit 50 is supported by the coil moving mechanism so as to be movable in the axial direction, similarly to the support method by the coil moving mechanisms 37A and 37B shown in fig. 12A to 12C. However, the terminal connection portion of this configuration is different from the configuration in which the terminal connection portions 61A and 61B move together with the movement of the coil moving mechanisms 37A and 37B as shown in fig. 12A to 12C, and is fixed at a fixed position in the axial direction.
Fig. 22 and 23 are process explanatory views schematically showing a pipe expanding process by the electromagnetic forming coil unit 50.
Fig. 22 shows a process of expanding the aluminum pipe member 13 at the axial position of the support member 49, and fig. 23 shows a process of expanding the aluminum pipe member 13 at the axial position of the support member 47.
As shown in fig. 22, the electromagnetic forming coil unit 50 is inserted into the tube of the aluminum pipe member 13 from the distal end 113 by the coil moving mechanism described above, and the coil portion as the winding portion 123a is moved to the axial position of the support member 49.
Then, in a state where the coil part is arranged at the relative position of the supporting member 49, the coil side terminals 119A and 121A of the coil side terminal supporting part 135A are sandwiched between the pressing member 149 and the supporting base 143, as in the case of the terminal connecting part 61 shown in fig. 10. Thus, the power source side terminals 145 and 147 and the coil side terminals 119A and 121A are pressed against each other to be electrically connected. The electromagnetically formed coil unit 50 is fixed in the axial direction by this crimping.
Then, a pulse current is supplied to the power source side terminals 145 and 147, and the aluminum pipe member 13 is expanded by electromagnetic forming at the position of the support member 49.
Next, the fixation in the terminal connecting portion 61 is released, the power supply side terminals 145 and 147 are separated from the coil side terminals 119A and 121A, and then, as shown in fig. 23, the coil portion 29 of the electromagnetic forming coil unit 50 is moved to the axial position of the supporting member 47.
Then, in a state where the coil part is arranged at the relative position of the support member 47, the coil side terminals 119A and 121A of the coil side terminal support portion 135A are sandwiched between the pressing member 149 and the support base 143 in the same manner as described above. At this time, the power supply side terminals 145 and 147 are arranged at the same position in the axial direction, and therefore, come into contact with the power supply side terminals 145 and 147 at different positions of the coil side terminals 119A and 121A. Thereby, the power source side terminals 145 and 147 are again brought into pressure contact with the coil side terminals 119A and 121A to be electrically connected to each other. Further, the electromagnetically formed coil unit 50 is fixed in the axial direction by this pressure bonding.
Then, a pulse current is supplied to the power source side terminals 145 and 147, and the aluminum pipe member 13 is expanded by electromagnetic forming at the position of the support member 37. In this way, the formed body after the pipe expansion shown in fig. 13B can be obtained.
Here, the power source side terminals 145 and 147 are flat plate-shaped electrode terminals fixed to the pressing member 149 as shown in fig. 24, and the surfaces facing the coil side terminals 119A and 121A are flat surfaces. When the power supply side terminals 145 and 147 are pressure-bonded to the coil side terminals 119A and 121A in the terminal connection portion 61, the terminals come into contact with each other in a wide area, and therefore, short-circuiting or spark generation during energization can be suppressed.
The coil side terminals 119A, 121A have an axial length Lc (Lc ≧ Ls) equal to or longer than a distance Ls by which the electromagnetic forming coil unit 50 moves. That is, the coil side terminals 119A and 121A have axial lengths equal to or longer than the maximum moving distance of the electromagnetic forming coil unit 50. Thus, the electromagnetic forming coil unit 50 can be connected to the power source side terminals 145 and 147 by moving to any position within the movement range, and the coil side terminals 119A and 121A can be connected to any position within the movement range. Thus, the electromagnetically formable region is free from restrictions, and a coil can be provided with a high degree of freedom.
The power source side terminals 145 and 147 are connected to and disconnected from the coil side terminals 119A and 121A at the same position. This eliminates the need to move the high-voltage power cables connected to the power source side terminals 145 and 147 when changing the molding position. Since the high-voltage power supply cable has low flexibility and a heavy weight, abrasion or breakage may occur due to drag when the cable moves. However, according to this configuration, cable movement is not required, the moving process of the electromagnetic forming coil unit can be simplified, workability can be improved, and durability of the electromagnetic forming apparatus can be improved.
In addition, since the electromagnetic forming coil unit 50 is firmly fixed in the axial direction at the time of pipe expansion by electromagnetic forming, stable electromagnetic forming without positional deviation can be realized.
< first modification >
The contact/separation type power supply side terminals 145 and 147 are not limited to a plate shape, and may be configured using disk-shaped electrode terminals.
Fig. 25 is a schematic configuration diagram showing a state in which the power supply side terminals 145A, 147A using disk-shaped electrode terminals are in contact with the coil side terminals 119A, 121A.
The power source side terminals 145A and 147A are disk-shaped electrode terminals rotatably supported, and are in rolling contact with the coil side terminals 119A and 121A. Thus, the power supply side terminals 145A and 147A and the coil side terminals 119A and 121A can move the electromagnetic forming coil unit 50 to a plurality of forming positions in a state where the terminals are connected to each other. Therefore, as shown in fig. 22 and 23, when the electromagnetic forming coil unit 50 moves in the axial direction, the coil side terminals 119A and 121A are conveyed to the next forming position while contacting the power supply side terminals 145A and 147A. A fixing mechanism, not shown, for restricting the axial movement of the electromagnetic forming coil unit 50 may be provided at each forming position, or the axial movement may be restricted by increasing the clamping force at the terminal connecting portions 61, 61A, 61 shown in fig. 10 and 17.
Further, since the electromagnetic forming coil unit 50 moves while being pressed by the power supply side terminals 145A and 147A, it is stably supported even during movement. Accordingly, as compared with the case of the contact/separation type power supply side terminal, the axial movement of the electromagnetic forming coil unit 50 can be performed smoothly with good workability, and high positioning accuracy can be obtained easily.
The disk-shaped electrode terminal may be configured by combining a plurality of disks or by arranging disks in a plurality of rows, in addition to a single disk. In this case, the effects of increasing the contact area and reducing the movement resistance can be obtained, and the effects of suppressing short-circuiting or spark generation at the time of energization can be obtained.
< second modification >
Fig. 26 is a schematic configuration diagram showing another configuration example of the electromagnetic forming coil unit.
In the coil-side terminal support portion 135B of the electromagnetic forming coil unit of this configuration, a pair of contact windows 171 and 173 are provided on one end side of the insulating support 117 side, and a pair of contact windows 175 and 177 are provided on the base end 111 side.
The contact windows 171 and 175 are provided with coil- side terminals 181 and 185 connected to the conductor extension 123b, and the contact windows 173 and 177 are provided with coil- side terminals 183 and 187 connected to the conductor extension 123 c. The coil side terminals 181, 185 are disposed at different positions along the conductor extension 123b, and the coil side terminals 183, 187 are disposed at different positions along the conductor extension 123 c. Further, on the formation surface of the contact windows 171, 173, 175, and 177 of the coil-side terminal support portion 135B, the regions other than the contact windows 171, 173, 175, and 177 are covered with an electrical insulating layer 189.
The contact windows 171 and 173 on the insulating support 117 side are provided at positions corresponding to the power source side terminals 145 and 147 shown in fig. 22 and 23, and are arranged at a distance Δ L in the axial direction in order to improve insulation. Similarly, the contact windows 175 and 177 on the base end 111 side are provided at positions corresponding to the power source terminals 145 and 147, and the windows are arranged at a distance Δ L apart in the axial direction.
The contact window 171 and the contact window 175 are axially spaced apart by a distance Ls equal to the distance Ls between the support member 47 and the support member 49 shown in fig. 22 and 23. Similarly, the contact window 173 and the contact window 177 are arranged apart from each other by a distance Ls in the axial direction.
In the electromagnetic forming coil unit having the above-described configuration, when the aluminum pipe member 13 is expanded at the axial position of the support member 49 shown in fig. 22, the contact windows 171 and 173 are arranged at axial positions facing the power source side terminals 145 and 147. Thus, the contact windows 171 and 173 serve as connection portions to be connected to the coil side terminals 119A and 121A. The contact window portions 175 and 177 are disposed at axial positions facing the power supply side terminals 145 and 147 when the aluminum pipe member 13 is expanded at the axial position of the support member 47 shown in fig. 23, and serve as connection portions to be connected to the coil side terminals 119A and 121A.
The power source side terminals 145 and 147 in this case can be arranged at positions separated from the support member 49 by La in the axial direction regardless of the pipe expansion position, as shown in fig. 22 and 23. That is, the power source side terminals 145 and 147 do not need to be moved in the axial direction with the change of the extension position. Accordingly, the high-voltage power cables connected to the power source side terminals 145 and 147 can be kept fixed, and the plurality of portions in the axial direction can be continuously electromagnetically formed, thereby making the process of expanding the plurality of portions more efficient.
The present invention is not limited to the above-described embodiments, and techniques that combine the respective configurations of the embodiments and that can be modified and applied by those skilled in the art based on the description of the specification and known techniques are also the contents of the present invention and are included in the scope of the claims.
The present application is based on japanese patent application filed on 12/7/2017 (japanese application 2017-.
Description of reference numerals:
13 aluminum pipe member
29A first electromagnetic forming coil part (coil part)
29B second electromagnetic forming coil part (coil part)
29C third electromagnetic forming coil part (coil part)
29D fourth electromagnetic forming coil part (coil part)
30. 40, 50 electromagnetic forming coil unit
30A first coil unit (electromagnetic forming coil unit)
30B second coil unit (electromagnetic forming coil unit)
30C third coil unit (electromagnetic forming coil unit)
30D fourth coil unit (electromagnetic forming coil unit)
43. 45, 47, 49 support member (rigid member)
111 base end
113 top end
115 axle core component
117. 117A, 117B insulating support
119. 119A, 121A, 153, 155, 181, 183, 185, 187 coil-side terminal (terminal)
123. 124 conductor
123a, 124a winding part
123b, 123c, 124b, 124c conductor extensions
125 resin coating layer
127. 129 groove (conductor holding part)
145. 147, 145A, 147A Power supply side terminal (terminal to be connected)
157. 159 groove (conductor holding portion).

Claims (14)

1. An electromagnetic forming coil unit which is formed in a longitudinal direction from a base end toward a tip end, is inserted into a tube of a tubular member from the tip end side, and expands the tubular member by an electromagnetic force,
the electromagnetic forming coil unit includes:
a resin shaft core member;
a conductor having a winding portion wound around the shaft core member and a pair of conductor extension portions extending from the winding portion to the base end side;
an insulating support body provided along the longitudinal direction at least one end of the axial direction of the shaft core member; and
a resin coating layer covering an outer peripheral surface of the winding portion of the conductor,
a conductor holding portion that holds the pair of conductor extending portions so as to be separated from each other is formed in the insulating support body along the longitudinal direction.
2. An electromagnetic forming coil unit which is formed in a longitudinal direction from a base end toward a tip end, is inserted into a tube of a tubular member from the tip end side, and expands the tubular member by an electromagnetic force,
the electromagnetic forming coil unit is provided with a plurality of coil parts arranged in a separated manner along the longitudinal direction,
the coil portion includes:
a resin shaft core member;
a conductor having a winding portion wound around the shaft core member and a pair of conductor extension portions extending from the winding portion to the base end side; and
a resin coating layer covering an outer peripheral surface of the winding portion of the conductor,
an insulating support body provided along the longitudinal direction between the plurality of coil portions and between an end portion on the base end side of the axial core member of the coil portion disposed closest to the base end side and the base end,
a conductor holding portion that holds the pair of conductor extending portions so as to be separated from each other is formed in the insulating support body along the longitudinal direction.
3. The electromagnetic forming coil unit according to claim 1 or 2,
the conductor is a tubular member.
4. The electromagnetic forming coil unit of claim 3,
a terminal is connected to an end of the conductor extending portion on the base end side.
5. The electromagnetic forming coil unit of claim 4,
the terminals are plate-shaped terminals.
6. The electromagnetic forming coil unit of claim 5,
the conductor extension portion is formed to extend from the insulating support body toward the base end side, and the terminal is formed to extend in the longitudinal direction.
7. The electromagnetic forming coil unit of claim 5,
the conductor extension portion is formed to extend from the insulating support body toward the base end side, and the terminals are arranged at a plurality of positions in the longitudinal direction, respectively.
8. A method for manufacturing a molded body using the electromagnetically molded coil unit as claimed in claim 1, wherein,
the method for manufacturing the formed body sequentially executes the following steps:
a pipe member arrangement step of arranging the pipe member at a processing position;
a coil arranging step of inserting the electromagnetic forming coil unit into a tube of the tubular member and arranging the wound portion of the conductor at an expanded position of the tubular member; and
and a pipe expanding step of expanding the tubular member at the expanded position by an electromagnetic force generated by applying current to the conductor of the electromagnetic forming coil unit.
9. A method for manufacturing a molded body using the electromagnetically molded coil unit as claimed in claim 2, wherein,
the method for manufacturing the formed body sequentially executes the following steps:
a pipe member arrangement step of arranging the pipe member at a processing position;
a coil arranging step of inserting the electromagnetic forming coil unit into a tube of the tubular member and arranging the wound portions of the conductor at different expanded positions of the tubular member; and
and a pipe expanding step of expanding the tubular member at the expanded position by electromagnetic force generated by applying current to the conductor of the electromagnetic forming coil unit.
10. The method for producing a shaped body according to claim 8 or 9, wherein,
the pipe member arranging step includes a step of arranging a rigid member that circumferentially surrounds the tubular member on an outer periphery of the expanded position of the tubular member.
11. The method for producing a shaped body according to claim 8 or 9, wherein,
after the pipe expanding step, the electromagnetic forming coil unit is moved in the longitudinal direction so that the winding portion of the conductor is disposed at a next pipe expanding position different from the pipe expanding position, and the pipe expanding step is executed again.
12. The method for producing a shaped body according to claim 10, wherein,
the pipe member arranging step includes a step of arranging a rigid member that circumferentially surrounds the tubular member on an outer periphery of the expanded position of the tubular member.
13. The method for producing a shaped body according to claim 11, wherein,
in the coil arranging step, the electromagnetic forming coil units are inserted from both ends in the axial direction of the tubular member.
14. The method for producing a shaped body according to claim 12, wherein,
in the coil arranging step, the electromagnetic forming coil units are inserted from both ends in the axial direction of the tubular member.
CN201880042387.3A 2017-07-12 2018-07-12 Electromagnetic forming coil unit and method for manufacturing formed body using same Active CN110869142B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2017136636 2017-07-12
JP2017-136636 2017-07-12
JP2018021085A JP6469908B2 (en) 2017-07-12 2018-02-08 Electromagnetic forming coil unit and method of manufacturing a molded body using the same
JP2018-021085 2018-02-08
PCT/JP2018/026398 WO2019013303A1 (en) 2017-07-12 2018-07-12 Coil unit for electromagnetic molding and method for producing molded article using same

Publications (2)

Publication Number Publication Date
CN110869142A true CN110869142A (en) 2020-03-06
CN110869142B CN110869142B (en) 2021-12-28

Family

ID=65001379

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201880042387.3A Active CN110869142B (en) 2017-07-12 2018-07-12 Electromagnetic forming coil unit and method for manufacturing formed body using same

Country Status (2)

Country Link
CN (1) CN110869142B (en)
WO (1) WO2019013303A1 (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837051B2 (en) * 1978-09-18 1983-08-13 株式会社井上ジャパックス研究所 Coil for electromagnetic forming
JPH06312226A (en) * 1993-04-28 1994-11-08 Showa Alum Corp Production of hollow material with changing cross section in longitudinal direction
JPH10314869A (en) * 1997-05-16 1998-12-02 Kobe Steel Ltd Aluminum or aluminum alloy structure and assembling method therefor
JP2004243353A (en) * 2003-02-12 2004-09-02 Kobe Steel Ltd Coil for electromagnetic expanded tube
CN102806262A (en) * 2012-08-06 2012-12-05 哈尔滨工业大学 Device and method for axial loading to assist bulging of magnetic pulse pipe
JP2013042029A (en) * 2011-08-18 2013-02-28 Citizen Holdings Co Ltd Kit for forming insulating film of coil winding core, insulating film formation method using the same, and clock
CN202910201U (en) * 2012-10-24 2013-05-01 安徽伊法拉电力科技有限公司 Die operation control device of steel wire expanding machine
WO2014030719A1 (en) * 2012-08-24 2014-02-27 三菱重工業株式会社 Pipe expansion jig, method for expanding heat transfer pipe, method for repairing heat transfer pipe, method for closing heat transfer pipe, and electromagnetic coil
CN103861933A (en) * 2014-04-01 2014-06-18 湖南大学 Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device
CN103894472A (en) * 2014-04-01 2014-07-02 湖南大学 Composite corrugated pipe forming device based on electromagnetic forming
CN204190966U (en) * 2014-11-24 2015-03-04 衡阳鸿大特种钢管股份有限公司 Hot-expanding pipe induction coil
CN106825269A (en) * 2016-12-29 2017-06-13 张家港市和恒精工机械有限公司 A kind of automatic tube expander

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488163A1 (en) * 1980-08-08 1982-02-12 Stephanois Rech Mec COIL FOR THE GENERALIZED IMPLEMENTATION OF THE MAGNETO FORMING METHOD, AND METHODS AND MEANS FOR MANUFACTURING THE REEL
JPS60180624A (en) * 1984-02-29 1985-09-14 Agency Of Ind Science & Technol Electromagnetic forming method using driver made of metallic foil
US4947667A (en) * 1990-01-30 1990-08-14 Aluminum Company Of America Method and apparatus for reforming a container

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837051B2 (en) * 1978-09-18 1983-08-13 株式会社井上ジャパックス研究所 Coil for electromagnetic forming
JPH06312226A (en) * 1993-04-28 1994-11-08 Showa Alum Corp Production of hollow material with changing cross section in longitudinal direction
JPH10314869A (en) * 1997-05-16 1998-12-02 Kobe Steel Ltd Aluminum or aluminum alloy structure and assembling method therefor
JP2004243353A (en) * 2003-02-12 2004-09-02 Kobe Steel Ltd Coil for electromagnetic expanded tube
JP4001557B2 (en) * 2003-02-12 2007-10-31 株式会社神戸製鋼所 Electromagnetic expansion coil
JP2013042029A (en) * 2011-08-18 2013-02-28 Citizen Holdings Co Ltd Kit for forming insulating film of coil winding core, insulating film formation method using the same, and clock
CN102806262A (en) * 2012-08-06 2012-12-05 哈尔滨工业大学 Device and method for axial loading to assist bulging of magnetic pulse pipe
WO2014030719A1 (en) * 2012-08-24 2014-02-27 三菱重工業株式会社 Pipe expansion jig, method for expanding heat transfer pipe, method for repairing heat transfer pipe, method for closing heat transfer pipe, and electromagnetic coil
CN202910201U (en) * 2012-10-24 2013-05-01 安徽伊法拉电力科技有限公司 Die operation control device of steel wire expanding machine
CN103861933A (en) * 2014-04-01 2014-06-18 湖南大学 Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device
CN103894472A (en) * 2014-04-01 2014-07-02 湖南大学 Composite corrugated pipe forming device based on electromagnetic forming
CN204190966U (en) * 2014-11-24 2015-03-04 衡阳鸿大特种钢管股份有限公司 Hot-expanding pipe induction coil
CN106825269A (en) * 2016-12-29 2017-06-13 张家港市和恒精工机械有限公司 A kind of automatic tube expander

Also Published As

Publication number Publication date
CN110869142B (en) 2021-12-28
WO2019013303A1 (en) 2019-01-17

Similar Documents

Publication Publication Date Title
CN110799283B (en) Electromagnetic forming device and electromagnetic forming method for aluminum pipe member
KR20070001105A (en) Apparatus and method for manufacture of a driveshaft
EP1187299B1 (en) Stator of dynamo-electric machine and manufacturing method therefor
EP2554320A1 (en) Resistance welded structure, resistance welding method, welded member and manufacturing method thereof
US11881748B2 (en) Method of inserting a hairpin
CN110869142B (en) Electromagnetic forming coil unit and method for manufacturing formed body using same
JP6469908B2 (en) Electromagnetic forming coil unit and method of manufacturing a molded body using the same
US20130106231A1 (en) Conductor weld-end length control forming
CN110799282B (en) Method for forming pipe member
CN111788020B (en) Electromagnetic forming method
JP6426241B1 (en) Electromagnetic forming apparatus for aluminum pipe members
WO2019013306A1 (en) Method for forming tube member
US6958564B2 (en) Armature with unitary coil and commutator
EP0566303B1 (en) Fabrication method of a deflection coil
WO2020017394A1 (en) Coil producing apparatus, coil producing system, coil producing method, and coil
CN111130282A (en) Method of manufacturing stator
US20130169103A1 (en) Conductor weld-end forming process
US20240022145A1 (en) Method for manufacturing stator and welding apparatus
CN116748372A (en) Electromagnetic forming device and forming method
US20230223808A1 (en) Winding for electromagnetic component, stator for rotary electric machine, rotary electric machine, and wheel
CN117161794A (en) Clamp for curved surface cutting and processing technology
JP2022070564A (en) Stator and joining method of coil wire of stator to external conductor
JPH10323011A (en) Linear motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant