JP2016201489A - Junction separation method for wound core, and outermost peripheral steel-plate cutting device for wound core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction separation method for a wound core for separating junctions of core components in order to fit a winding wire to the wound core that is connected by a welding part in the state where both ends of a band-shaped outermost peripheral steel plate are overlapped, while winding the band-shaped outermost peripheral steel plate around an outermost periphery of a laminate having a structure where a plurality of core components in a band plate shape are laminated by wrap-bonding or but-bonding both ends while being wound so as to form one turn.SOLUTION: In portions that are overlapped with each other of an outermost peripheral steel plate 1b of a wound core 1, a portion 1bo that is disposed outside is cut at a position in front of a welded part W of the outermost peripheral steel plate, and junctions of core components are then separated.SELECTED DRAWING: Figure 2

Description

  The present invention provides a method of separating a joint portion of a wound core that separates a joint portion of the wound core in order to allow a winding to be attached to the wound core, and a method of separating the joint of the wound core. The present invention relates to an outermost peripheral steel sheet cutting device for a wound iron core that cuts an outermost peripheral steel sheet wound around the outer periphery and welded at both ends.

  As an iron core used for static induction electrical equipment such as a transformer, a wound iron core formed by winding and laminating iron core components made of a band-shaped silicon steel plate is often used. The iron core component may be configured by a single strip steel plate, or may be configured by laminating a plurality of strip steel plates as disclosed in Patent Document 1. When manufacturing a wound core, a plurality of wound core components wound in a state where both ends are separable and wrap-joined or butt-joined in a state where both ends are separable are laminated to form a laminate of iron core components. After the configuration, a belt-shaped outermost peripheral steel plate is wound around the outer periphery of the laminate, and spot welding is performed with both ends of the outermost peripheral steel plate being overlapped. By constraining the wound core by welding both ends of the outermost circumferential steel sheet wound around the outer periphery of the laminated body of the core components, the joints of each core component are kept until the wound core is annealed. Prevents separation.

  In many cases, a wound iron core used for a static induction electrical device has a pair of leg portions arranged in parallel to each other, and a pair of yoke portions that respectively connect between one end and the other end of both leg portions, The whole is formed so as to exhibit a substantially rectangular shape, and a joint portion of a plurality of core components constituting the wound core is arranged in one yoke portion.

  When assembling static induction electrical equipment using this type of wound core, after annealing the wound core, release the restraint of the wound core by the outermost peripheral steel plate, separate the joints of each core component, The winding core legs separated from each other are inserted into the window portions of the windings wound in a separate process, and the windings are attached to the winding core legs. After attaching the windings to the legs of the wound core in this way, by rejoining the joints of each core component, the yoke part of the opened core is closed and the wound core is restored to its original position. Return to shape.

  As described above, when attaching the winding to the wound iron core, to make it possible to insert the legs of the wound iron core into the window of the winding, It is necessary to separate the joints of each iron core component. Conventionally, the work of releasing the restraint of the wound core by the outermost peripheral steel sheet has been performed by manually peeling the spot welded portion of the outermost peripheral steel sheet.

JP 2009-44199 A

  As described above, conventionally, the spot welded portion of the outermost peripheral steel plate was manually peeled to release the restraint of the wound core by the outermost peripheral steel plate. In order to avoid damaging the iron core components that make up the steel, it is necessary to perform it carefully by hand, which not only requires skill, but also increases the number of work steps and is troublesome. In addition, the work of peeling the welded portion of the outermost peripheral steel sheet is performed by holding the wound iron core with one hand and piling the tool held in the other hand between the overlapped portions of the outermost peripheral steel sheet. Since the core components and the outermost peripheral steel plate constituting the wound iron core have sharp edges at the edge portions, there is a risk that the operator may be injured by touching the edges.

  Further, when peeling the welded portion of the outermost peripheral steel plate, it is inevitable that the outermost peripheral steel plate is deformed by a tool. Therefore, the outermost peripheral steel plate from which the welded portion has been peeled must be discarded.

  As described above, when attaching the winding to the wound core, when separating the joint portion of the wound core, when removing the welded portion of the outermost peripheral steel plate and releasing the restraint of the wound core by the outermost peripheral steel plate Because it requires a lot of man-hours and is dangerous to work, the joint of the wound core is separated by releasing the restraint of the wound core by the outermost steel plate without the work of peeling the welded part of the outermost steel plate. It has been desired to propose a method to do this, but such a method has not yet been proposed.

  The purpose of the present invention is to separate the welded portion of the outermost peripheral steel plate from the work of separating the joints of the core components constituting the wound core in attaching the winding to the wound core after annealing the wound core. The object is to propose a method for separating the joints of a wound core that can be performed without any work.

  Another object of the present invention is to separate the joints of the core components constituting the wound core when attaching the winding to the wound core after annealing the wound core. In order to be able to perform without the work of peeling, the outermost peripheral steel sheet cutting of the wound iron core that cuts the outermost peripheral steel sheet that is wound around the outermost periphery of the wound iron core and is welded with both ends overlapped. To provide an apparatus.

The present invention is directed to a wound iron core joint separation method for separating a wound iron core joint in attaching a winding to a wound iron core. The wound core targeted by the separation method according to the present invention includes a plurality of wound bodies of strip-shaped core components wound in one turn and wrapped or butt-joined in a state where both ends are separable. A laminated body having a laminated structure, and an outermost peripheral steel sheet wound around the outer circumference of the laminated body and bonded together by welds in a state where both ends are overlapped.
The iron core component may be composed of a single strip steel plate or a laminate of a plurality of strip steel plates.

  In the present invention, among the portions of the outermost peripheral steel plates that are overlapped with each other, after cutting the portion disposed on the outer side at a position before the welded portion of the outermost peripheral steel plate, To separate.

  As described above, among the parts of the outermost circumferential steel plate that are overlapped with each other, when the portion disposed outside is cut at a position before the welded portion of the outermost circumferential steel plate, the welded portion of the outermost circumferential steel plate is not peeled off. However, since the restraint of the wound core by the outermost peripheral steel plate can be released, the work of separating the joints of each core component can be performed without performing the manual work of peeling the welded portion of the outermost peripheral steel plate, The operation | work which attaches a coil | winding to a wound iron core can be made easy.

  In addition, when the welded portion of the outermost peripheral steel plate is peeled off in order to release the restraint of the wound iron core by the outermost peripheral steel plate, the outermost peripheral steel plate is deformed near the peeled welded portion of the outermost peripheral steel plate. However, according to the method of the present invention, since the outermost peripheral steel plate can be cut cleanly, the outermost peripheral steel plate can be used as a part of the wound iron core without being discarded. It becomes possible.

  For the cutting of the outermost peripheral steel sheet, it is preferable to use a thermal cutting machine that cuts the steel sheet using heat, such as an air plasma cutting machine or a laser cutting machine.

  If a thermal cutting machine is used as a cutting machine for cutting the outermost peripheral steel sheet, the cutting thickness can be easily controlled by the heat applied to the part to be cut of the outermost peripheral steel sheet, so that the core components of the wound iron core are damaged. However, only the part arrange | positioned outside can be easily cut | disconnected among the parts on which the outermost periphery steel plate mutually overlapped, and automation of the cutting | disconnection operation | work of an outermost periphery steel plate can be aimed at easily.

  Further, according to the present invention, in order to carry out the above-described method of separating the joint portion of the wound iron core, the portion disposed on the outer side among the overlapped portions of the outermost peripheral steel plates is set at a position before the welded portion. An outermost peripheral steel plate cutting device for a wound iron core that cuts along the cut line is provided.

  The outermost peripheral steel sheet cutting apparatus according to the present invention includes a wound core holding base that holds the wound core with the welded portion of the outermost peripheral steel plate facing upward, and a cutting line above the wound core held by the wound core holding base. A slide unit having a slider that can move in a direction parallel to the slider, and a movable frame that is supported by the slider and that is displaced together with the slider along the cutting line of the outermost peripheral steel plate of the wound core held by the wound core holder. A thermal cutting torch supported by the movable frame and whose tip is directed to a cutting line set on the outermost peripheral steel plate, and a winding supported by the movable frame together with the thermal cutting torch and held by the wound core holding base A guide roller that rolls along the cutting line while contacting the outermost steel sheet of the iron core and keeps the distance between the tip of the thermal cutting torch and the outermost steel sheet constant, and the thermal cutting torch along the cutting line Move It constituted by providing a motor for driving the slider so as to.

  When configured as described above, the distance between the tip of the thermal cutting torch and the outermost peripheral steel plate is kept constant, and the outermost peripheral steel plate is cut by the thermal cutting torch so that only the outermost peripheral steel plate can be cut. By setting the heat output of the torch for thermal cutting in advance, it is possible to reliably cut only the outermost peripheral steel sheet without damaging the iron core components inside the outermost peripheral steel sheet.

  In a preferred embodiment of the present invention, when a command to start cutting the outermost peripheral steel plate of the wound iron core is given, a heat output for cutting the outermost peripheral steel plate is generated from the thermal cutting torch, and at the same time, the motor is driven. A cutting control device for controlling the torch and the motor is provided so that the thermal cutting torch is moved at a set speed along the cutting direction.

  If comprised as mentioned above, since the operation | work which cut | disconnects an outermost periphery steel plate can be performed automatically, the operation | work which releases the restraint of the junction part of a wound iron core can be made easy.

  According to the method for separating a joint portion of a wound core according to the present invention, among the portions of the outermost circumferential steel sheet existing in the annealed wound core, the portion disposed on the outer side is the welded portion of the outermost circumferential steel sheet. Unwinding the wound core by cutting at a position in front of each other, so as to separate the joints of each core component, without performing the troublesome manual work of peeling the welded portion of the outermost peripheral steel plate, The operation of separating the joint portions of the respective iron core components can be performed, and the operation of attaching the windings to the wound iron core can be facilitated.

  Further, according to the present invention, since the outermost peripheral steel plate can be cut cleanly to release the restraint of the wound core, it can be used as a part of the constituent elements of the wound core without discarding the cut outermost steel plate. Can be made possible.

  Further, according to the outermost circumferential steel plate cutting device according to the present invention, the outermost circumferential steel plate is cut by the thermal cutting torch while keeping the distance between the tip of the thermal cutting torch and the outermost circumferential steel plate constant. By setting the heat output of the thermal cutting torch and the moving speed of the torch so that only the steel plate can be cut, only the outermost steel plate can be removed without damaging the core components inside the outermost steel plate. It can cut reliably, and mechanization of the cutting work of the outermost peripheral steel plate can be easily achieved.

It is sectional drawing which showed typically an example of the structure of the wound iron core by which the outermost periphery steel plate is cut | disconnected by the junction part isolation | separation method of the wound iron core which concerns on this invention. It is sectional drawing which showed the state which cut | disconnected the wound core of FIG. 1 with the junction part isolation | separation method of the wound core which concerns on this invention. It is the perspective view which showed the structure of the principal part of one Embodiment of the outermost periphery steel plate cutting device of the wound iron core which concerns on this invention. (A) is an enlarged front view of the main part showing the tip portion of the thermal cutting torch used in the cutting device shown in FIG. 3 and the guide roller disposed on the side of the torch, and (B) is (A) FIG. It is the block diagram which showed one structural example of the motor control apparatus which can be used with the joining part outermost periphery steel plate cutting device of the wound iron core which concerns on this invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of a method for separating a joint portion of a wound iron core according to the present invention and an outermost peripheral steel plate cutting device for use in carrying out the separation method will be described in detail.
FIG. 1 schematically shows the structure of a wound core 1 that separates joints by the joint separation method according to the present invention. The wound iron core 1 shown in the figure includes a pair of leg portions 1A and 1B arranged in parallel to each other and a pair of yoke portions that connect between one end and the other end in the length direction of the legs 1A and 1B. It is a substantially rectangular wound core having 1C and 1D. The illustrated wound core is a wound body of a plurality of strip-shaped iron core components 1a1, 1a2, 1a3,... Wound around one turn and joined together with both ends overlapped (lap joining). Are laminated in order from the inside to the outside, and a belt-like outermost circumferential steel plate 1b wound around the outer circumference of the laminated body. In this embodiment, each iron core component is made of a strip-shaped silicon steel plate having a predetermined thickness and length.

  In the example shown in the figure, three core components 1a1 to 1a3 are shown, but in practice, more core elements may be provided in order to secure a necessary cross-sectional area of the core. In order to increase the space factor of the iron core in the window portion of the winding, the width dimension of the series of core components may be changed stepwise to make the shape of the cross section of the leg portion of the wound core closer to a circle.

  Note that the lap joints at both ends of each iron core component are simply overlapped at both ends of each iron core component with a certain overlap, and can be easily separated when the constraint is released.

  In the illustrated example, both ends of each core component are lap-joined, but both ends of each core component may be butt joined. In the butt joint, both ends of each iron core component are arranged in a state where they are simply abutted (a state where they face each other). Even if any structure is adopted as the joint structure at both ends of each core component, the joints at both ends of the series of core components are shifted in a stepped manner to one yoke portion 1C of the wound core. It is arranged with.

  The winding core 1 is annealed before the winding is attached, but until the annealing, both ends of each core component are in a state of being easily separated if the restraint is released, so the core components 1a1 to 1a3 The outermost peripheral steel plate 1b is wound around the outer periphery of the laminated body composed of the wound body, and both ends of the outermost peripheral steel plate 1b are welded to maintain the shape of the wound iron core. The outermost peripheral steel plate 1b is arranged in a state where both ends thereof are overlapped with a larger overlap margin than the lap joint portion of the iron core component, and the overlapped portions are joined by the spot welded portion W. The outermost peripheral steel plate 1b may be made of a steel plate made of a material different from the steel plate constituting the iron core component, but in this embodiment, the outermost peripheral steel plate 1b is made of a steel plate made of the same material as the iron core components 1a1 to 1a3. It has become.

  When the winding is attached to the wound core 1 after annealing the wound core 1, the restraint of the wound core by the outermost peripheral steel plate 1 b is released (the restraint of the joints at both ends of each core constituent element), The joints at both ends of the iron core component are opened, and the legs 1A and 1B of the wound iron core are inserted into the windows of the windings (not shown) wound in a separate process. After inserting the leg portions 1A and 1B of the wound core into the window portion of the winding, both ends of each core component are rejoined to assemble a stationary induction device such as a transformer.

  As described above, when the winding is attached to the wound core, it is necessary to release the restraint of the wound core by the outermost peripheral steel plate 1b so that the joint portions of the core components can be separated. Conventionally, by separating the welded portion W of the outermost peripheral steel plate 1b using a tool, both ends of the outermost peripheral steel plate 1b are separated, and the restriction of the joint portion of the series of core components is released. In such a case, the above-described problem occurs.

  Therefore, in the present invention, as shown in FIG. 2, the portion (outer portion) 1 bo arranged on the outer side among the portions 1bi and 1bo of the outermost peripheral steel plate 1b that are overlapped with each other is replaced with a welded portion of the outermost peripheral steel plate. After cutting at a position before W, the joint portions of the iron core components 1a1 to 1a3 are separated.

  Cutting of the outermost peripheral steel plate 1b is performed by supplying plasmaized air to the cut portion of the workpiece and fusing the workpiece, or by irradiating the cut portion of the workpiece with laser light. Like cutting, it is preferable to use thermal cutting in which the workpiece is melted by supplying heat to the part to be cut.

  When the cutting of the portion 1bo arranged outside the overlapping portion of the outermost peripheral steel plate 1b is performed by thermal cutting, the amount of heat given to the cut portion of the outermost peripheral steel plate and the cutting speed (moving speed of the cutting torch) are obtained. Since the thickness of the part to be cut can be controlled by adjusting, as shown in FIG. 2, the part (bi) arranged on the inner side of the superposed parts 1bi and 1bo of the outermost peripheral steel plate 1b ( Only the outer portion 1bo can be easily cut without cutting the inner portion 1bi.

  As mentioned above, when the part arrange | positioned on the outer side among the parts overlaid on the outermost peripheral steel plate 1b is cut | disconnected in the position before the welding part W of this outermost peripheral steel plate, the welding part W of the outermost peripheral steel plate 1b. Because it is possible to release the restraint of the wound core by the outermost peripheral steel plate without peeling off, the work of separating the joints of each core component without performing the troublesome manual work of peeling the welded portion of the outermost peripheral steel plate And the work of attaching the winding wire to the wound iron core can be facilitated.

  Further, as described above, by cutting the outer portion of the overlapped portion of the outermost peripheral steel plate 1b at a position in front of the welded portion W to release the restraint of the wound core by the outermost peripheral steel plate, Since the outermost peripheral steel plate is not deformed or damaged as in the case of peeling the welded portion, the outermost peripheral steel plate 1b can be effectively used as a part of the wound core. When the outer portion of the overlapped portion of the outermost peripheral steel plate 1b is cut at a position before the welded portion, the outermost peripheral steel plate 1b has the portion welded by the welded portion W as the remaining portion R (see FIG. 2). Although it remains in the state of being bonded to the outer peripheral steel plate, when the outermost peripheral steel plate 1b is used as a part of the wound core, the residual portion R does not affect the characteristics of the iron core. The portion R does not hinder the effective use of the outermost peripheral steel plate.

  In FIG. 1 and FIG. 2, each of the core components 1a1 to 1a3 is illustrated as being formed of a single strip steel plate, but each core component is a plurality of strip plates. You may consist of what laminated | stacked the steel plate.

  In order to carry out the above-described separation method, cutting is performed by setting a portion (outer portion) 1bo arranged on the outer side of the portions 1bi and 1bo overlapped with each other on the outermost peripheral steel plate 1b to a position in front of the welded portion W. The structural example of the outermost peripheral steel plate cutting device 10 of the wound iron core cut | disconnected along a line was shown in FIG. 3 thru | or FIG.

  In FIG. 3, reference numeral 11 denotes a wound core holding base for holding the wound core 1 with the welded portion W (not shown in FIG. 3) of the outermost peripheral steel plate 1b facing upward. Although not shown, the wound core holding table 11 is provided with positioning means for positioning the wound core until the outermost peripheral steel plate of the wound core 1 is cut. A straight cutting line CL extending in the width direction of the outermost peripheral steel plate is set at a position before the welded portion W of the outermost peripheral steel plate 1b of the wound core 1. The location where the cutting line is set is arbitrary, but in the example shown in the drawing, the cutting line CL is set near the end portion of the leg portion 1A of the wound core 1 on the yoke portion 1C side.

  The wound core holding base 11 is provided so that the upper surface thereof becomes a horizontal plane, and a pair of the wound core holding bases 11 extends in parallel with each other along the longitudinal direction of the legs of the wound core 1 with the wound core 1 therebetween. Fixed frames 12 and 12 are arranged. The fixed frame 12 shown in the figure is formed in a band plate shape, and both ends in the longitudinal direction of each fixed frame 12 are a support bolt 13 whose lower end is fixed to a holding base 11 and a nut 14 screwed to the support bolt. And is fixed to the holding table 11. The fixed frames 12, 12 are provided so as to extend in parallel with the upper surface of the holding table 11, and the slide unit 16 is fixed to these fixed frames via support posts 15, 15.

  The slide unit 16 is provided so as to extend above the wound core 1 in parallel with the cutting line CL, and is guided by the guide rail 17 whose both ends in the longitudinal direction are fixed to the upper ends of the support posts 15, 15. In addition, a slider 18 that is moved along a direction parallel to the cutting line CL and a slider drive motor 19 that drives the slider 18 are provided. A screw rod (not shown) screwed to a nut (not shown) fixed to the slider 18 is connected to the rotating shaft of the motor 19, and the screw rod is rotated by the motor 19. Thus, the slider 18 can be reciprocated along the guide rail 17.

  The slider 18 supports a movable frame 20 that is displaced together with the slider 18 along the cutting line CL of the outermost peripheral steel plate 1b of the wound core 1 held on the wound core holding table 11. In the illustrated example, the rear end portion of the movable arm 23 is rotatably supported by a support fitting 21 fixed to the slider 18 via a pin 22, and the movable frame 20 is attached to the distal end portion of the movable arm 23. . The movable arm 23 is provided so as to extend in a direction orthogonal to the cutting line CL. By rotating the movable arm 23, the movable frame 20 is set in the vicinity of the cutting line CL of the wound iron core 1. The position can be displaced to a position (a position when cutting the outermost peripheral steel plate of the wound iron core at the position shown in FIG. 3) and a retracted position set above the guide rail 16. .

  As shown in FIGS. 4A and 4B, the movable frame 20 supports the thermal cutting torch 25 and the guide roller 26. The thermal cutting torch is a torch having a function of fusing a workpiece by supplying heat to a workpiece cut portion. In the present embodiment, as the thermal cutting torch 25, plasmaized air is cut into the workpiece. An air plasma cutting torch is used which is supplied to the section to melt the workpiece. The mounting position of the thermal cutting torch 25 is set so that the tip of the torch 25 is directed to the cutting line CL when the movable arm 20 is in the operating position as shown in FIG.

  The guide roller 26 is rotatably supported by a lower end of a bracket 28 whose upper end is fixed to the movable frame 20 via a rotation shaft 29 extending in a direction orthogonal to the cutting line CL. The guide roller 26 rolls along the cutting line CL along with the displacement of the slider 18 while being in contact with the outermost peripheral steel plate 1b of the wound iron core in the vicinity of the torch 25, and the leading end of the thermal cutting torch 25 and the outermost periphery. The distance between the steel plate 1b is kept constant.

  FIG. 5 shows the configuration of the control system of the outermost peripheral steel sheet cutting device used in the present embodiment. In FIG. 5, reference numeral 30 denotes a cutting control device for controlling the thermal cutting torch 25 and the slider driving motor 19, 31 Is a rotation speed sensor that detects the rotation speed of the motor 19 and gives information of the detected rotation speed to the cutting control device 30.

  The thermal cutting torch (air plasma cutting torch) 25 is supplied with compressed air from an air supply source (not shown). The air plasma cutting torch generates an arc between the torch 25 and the workpiece by a voltage applied between the torch and the workpiece from a power supply device 32 (not shown), and is supplied from the air supply source by this arc. The formed air is turned into plasma, and the cut air of the outermost peripheral steel plate 1b is irradiated with the plasmaized air to cut the outermost peripheral steel plate 1b. The amount of heat applied from the torch 25 to the outermost peripheral steel plate 1b can be finely adjusted by adjusting the amount of air supplied, the voltage applied between the torch 25 and the outermost peripheral steel plate 1b, and the moving speed of the torch 25. . When cutting the outermost circumferential steel plate 1b, the amount of heat applied from the torch 25 to the outermost circumferential steel plate 1b is adjusted so that only the outer portion 1bo of the lapped portions 1bi and 1bo of the outermost circumferential steel plate 1b is melted. Keep it.

  The cutting control device 30 receives a command (cutting start command) for starting cutting of the outermost peripheral steel plate of the wound core 1 held on the wound core holding table 11 from the thermal cutting torch 25 to the outermost periphery. At the same time as generating heat output for cutting the steel plate 1b, the driving of the motor 19 is started and the torch 25 and the motor 19 are moved so as to move the thermal cutting torch 25 at a set speed along the cutting direction. Control. The cutting control device 30 can be configured using a commercially available sequencer.

  When cutting the outermost peripheral steel plate of the wound core with the cutting device of this embodiment, first, the wound core 1 is loaded onto the wound core holding base 11 and the wound core 1 is positioned at a fixed position by a positioning means (not shown). When performing the work of holding the wound core 1 on the wound core holding base 11, the movable frame 20 is set above the guide rail 17 so that the torch 25 and the guide roller 26 do not interfere with the work. The torch 25 and the guide roller 26 are retracted from the operating position (position shown in FIG. 3) in the retracted position.

  After the wound core 1 is loaded onto the wound core holding base 11 and positioned at a fixed position, the movable arm 23 is rotated to position the movable frame 20 at the operating position shown in FIG. While directing to CL, the guide roller 26 is brought into contact with the outermost peripheral steel plate 1b of the wound iron core. In this state, a cutting start command is given to the cutting control device 30 by a push button switch or the like. The cutting control device 30 applies a voltage between the torch 25 and the wound core 1 to generate a heat output for cutting the outermost peripheral steel plate 1b of the wound core from the torch 25, and at the same time starts driving the motor 19. Then, the torch 25 and the motor 19 are controlled so that the thermal cutting torch 25 is moved at a set speed along the cutting direction.

  If the cutting control device 30 is provided as described above, it is possible to automatically perform the work of cutting the outermost peripheral steel plate of the wound core, thereby facilitating the work of releasing the restraint of the joint part of the wound core. Can do.

  In the above embodiment, an air plasma cutting torch is used as a torch for cutting the outermost peripheral steel sheet of the wound iron core 1. However, as a thermal cutting torch, the amount of heat given to a part to be cut in order to control the cutting thickness. Any thermal cutting torch such as a laser cutting torch may be used as long as it can be adjusted.

  When the wound core is manufactured by the conventional wound core manufacturing method, the inner portion 1bi and the outer portion 1bo of the overlapped portion of the outermost peripheral steel plate of the wound core are in direct contact with each other, but the outermost peripheral steel plate 1b is wound. If it is possible to add a step of inserting a protective plate between the inner portion 1bi and the outer portion 1bo of the portion of the outermost peripheral steel plate to be overlapped, the outer portion of the outermost steel plate is inserted at the portion where the protective plate is inserted. By cutting the portion 1bo, it is possible to easily cut the outermost peripheral steel plate and reliably prevent the inner portion 1bi from being damaged during the cutting.

DESCRIPTION OF SYMBOLS 1 Core iron core 1a1-1a3 Core component 1b Outermost steel plate 10 Outermost steel plate cutting device 11 Winding iron core holder 12 Fixed frame 16 Slide unit 17 Guide rail 18 Slider 19 Slider drive motor 20 Movable frame 21 Support metal fitting 22 Pin 23 Movable Arm 25 Thermal cutting torch 26 Guide roller CL Cutting line

Claims (6)

A laminated body having a structure in which a plurality of wound bodies of strip-shaped core components wound around one turn and lap-joined or butt-joined in a state where both ends are separable are laminated, and the laminated body In order to attach a winding to a wound core provided with an outermost peripheral steel plate that is wound around the outer periphery of the steel sheet and joined together by welds in a state where both ends are overlapped, a wound core that separates the joints of each core component The method for separating the joints of
Separating the joint portion of each iron core component after cutting the portion arranged on the outside of the portion of the outermost peripheral steel plate superimposed on each other at a position before the welded portion of the outermost peripheral steel plate,
A method for separating a joint part of a wound iron core characterized by the above.   The said outermost peripheral steel plate is cut | disconnected with a thermal cutting machine, The junction part isolation | separation method of the wound core described in Claim 1 characterized by the above-mentioned. In order to carry out the method of separating a joint portion of a wound core according to claim 1, a portion disposed on the outer side of the overlapped portions of the outermost peripheral steel plates is placed at a position before the welded portion. An outermost peripheral steel plate cutting device for a wound iron core that cuts along a set cutting line,
A wound core holding base that holds the wound core in a state in which the welded portion of the outermost peripheral steel plate faces upward;
A slide unit including a slider that is movable in a direction parallel to the cutting line above the wound core held by the wound core holding table;
A movable frame supported by the slider and displaced with the slider along a cutting line of the outermost peripheral steel plate of the wound core held by the wound core holding table;
A thermal cutting torch that is supported by the movable frame and whose tip is directed to a cutting line set on the outermost peripheral steel plate;
The thermal cutting torch is supported by the movable frame together with the thermal cutting torch and rolls along the cutting line while being in contact with the outermost peripheral steel plate of the wound core held by the wound core holding table. A guide roller that maintains a constant distance between the tip and the outermost peripheral steel sheet;
A motor for driving the slider to move the thermal cutting torch along the cutting line;
An outermost peripheral steel plate cutting device for a wound iron core, comprising:   When a command to start cutting of the outermost peripheral steel sheet of the wound core is given, a heat output for cutting the outermost peripheral steel sheet is generated from the thermal cutting torch, and at the same time, the driving of the motor is started. A winding control device according to claim 3, further comprising a cutting control device for controlling the torch and the motor so as to move the thermal cutting torch at a set speed along the cutting direction. Iron core outermost steel plate cutting device.   The outermost peripheral steel sheet cutting device for a wound iron core according to claim 3 or 4, wherein the thermal cutting torch is a plasma cutting torch.   The outermost peripheral steel sheet cutting device for a wound iron core according to claim 3 or 4, wherein the thermal cutting torch is a laser cutting torch.

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