JP2012222877A - Device and method for bending and forming flat conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for bending and forming a flat conductor which bends a flat conductor, attached to a stator core and protruding from a core end surface, into a predetermined shape with high accuracy by using a simple structure.SOLUTION: A bending and forming device 10 comprises: a forming surface 11a formed into a desired bent shape of a flat conductor 10; a punch 11 arranged along an end surface of the stator core 40; a first roller 12 contacting with the flat conductor 40 and bending and forming the flat conductor 40 so as to imitate the forming surface 11a; a guide surface 14a formed into the same shape as the forming surface 11a; a rail 14 disposed parallel with the punch 11; a second roller 13 moving along the guide surface 14a; a holding part 15 which rotatably holds the first and second rollers 12 and 13, holds the first roller 12 so as to move in conjunction with the movement of the second roller 13, and is disposed between the punch 11 and the rail 14; and a cylinder 19 moving the holding part 15 only in one direction.

Description

  The present invention relates to a bending apparatus and method for bending a rectangular conductor constituting a coil into a predetermined shape. More specifically, the present invention relates to a molding apparatus and method for bending a rectangular conductor mounted on a stator core and protruding from a core end surface into a predetermined shape.

  In general, rotating electrical machines such as induction motors and DC motors (including generators) are widely used as power sources for industrial or vehicle use. In recent years, with respect to motors used in hybrid drive vehicles and electric vehicles, there is an increasing demand for higher motor efficiency and smaller size and weight. For this reason, it has been studied to use a rectangular conductor for the coil in order to allow a large amount of current to flow and improve the space factor.

  In order to form a coil using a flat conductor, it is necessary to bend the flat conductor into a predetermined shape. Therefore, for example, a rectangular conductor is bent into a predetermined shape using a plurality of bending dies to form a segment, and the end of each segment is joined to one end side of the stator core by welding or the like to form a coil as a whole. It has been proposed to do. Here, the bending forming of the rectangular conductor is performed by bending the conductor material with a bender machine into a predetermined two-dimensional shape, and sandwiching the two-dimensional shape of the conductor material with a mold of a press molding machine, It is cut into a predetermined length and formed into a predetermined three-dimensional shape (see Patent Document 1). Japanese Patent Application Laid-Open No. H10-228561 describes that a conductor material can be formed by copying using a roller instead of pressing. In addition, it is thought that the roller used for a copying process is comprised so that biaxial operation | movement may be carried out using a cylinder etc. from drawing of a gazette.

JP 2003-143818 A

  However, there has been a problem that it is difficult to bend and form a rectangular conductor mounted on a stator core by the above-described method for bending a rectangular conductor. This is because the space for bending a rectangular conductor attached to the stator core is limited, and in order to perform the above bending, a space of a certain amount or more is required due to the structure of the device, and it can be applied as it is. It is because it is not possible. In addition, the above-described apparatus configuration for bending a rectangular conductor is disadvantageous in terms of cost. The flat conductor is bent when it is attached to the theta core when a coil is formed by combining a plurality of flat conductors, and when a flat conductor that has been bent in advance is used, This is because the conductors interfere with each other, thereby preventing such interference between the rectangular conductors.

  Here, in order to save space and reduce the cost, in order to bend the flat conductor mounted on the stator core, a uniaxial motion profiling process in which the roller is moved only in one direction (horizontal direction) is used. It is possible. However, in this method, when the rectangular conductor is bent and formed into a complicated shape having a step or the like, a portion where the rectangular conductor cannot be pressed with a roller is generated. As a result, the flat conductor cannot be accurately bent into a desired shape.

  Accordingly, the present invention has been made to solve the above-described problems, and a rectangular conductor that is mounted on a stator core and that protrudes from the end face of the core can be bent accurately into a predetermined shape with a simple configuration. It is an object of the present invention to provide a bending apparatus and method.

  One aspect of the present invention made to solve the above problems is a flat conductor bending apparatus for bending a flat conductor mounted on a stator core into a desired shape to form a coil. And a punch arranged along the end face of the stator core, and a first conductor for bending the rectangular conductor so as to abut the rectangular conductor and follow the molding surface of the punch. A roller, a guide surface formed in the same shape as the molding surface of the punch, a rail disposed in parallel to the punch, a second roller moving along the guide surface of the rail, and the first A holding mechanism that holds the first and second rollers rotatably and holds the first roller movably in conjunction with the second roller, and is disposed between the punch and the rail. , And having a moving mechanism for moving the holding mechanism in only one direction.

  In this flat conductor bending apparatus, a punch having a forming surface formed into a desired bent shape of a flat conductor is disposed along an end surface of the stator core, and a first roller held by a holding mechanism is attached to the stator core. The flat conductor is brought into contact with the formed flat conductor and moved so as to follow the forming surface of the punch, and the flat conductor is bent and formed by the punch and the first roller. At this time, the first roller is rotatably held together with the second roller by the holding mechanism, and is moved in conjunction with the second roller. The second roller is formed in the same shape as the punch forming surface, has a guide surface, and moves along the guide surface of the rail arranged in parallel to the punch. For this reason, the first roller can be moved so as to follow the molding surface of the punch by always contacting the flat conductor. As a result, the rectangular conductor mounted on the stator core can be accurately bent into a desired shape.

  In this flat conductor bending apparatus, the first roller (and the second roller) is held by a holding mechanism and moved only in one direction (horizontal direction) for copying. That is, the rectangular conductor is bent by uniaxial scanning. Thereby, space saving and cost reduction can be achieved, and the flat conductor in a state of being mounted on the stator core can be bent and formed with high accuracy.

  In the above-described flat conductor bending apparatus, the holding mechanism is rotatably supported with respect to the first holding member, the first holding member rotatably holding the first roller, and the second holding member. A second holding member for rotatably holding the roller; and the first roller via the first holding member so that the flat conductor is bent and shaped with a constant load applied by the first roller. And a pressing mechanism that presses the flat rectangular conductor.

  With this configuration, the holding mechanism can be realized with a simple structure. That is, with a simple structure, the first roller and the second roller can be rotatably held, and the first roller can be moved in conjunction with the second roller, which saves space and reduces the cost of the bending apparatus. Contributes to And a 1st roller can always be pressed to a flat conductor with a fixed load with a press mechanism. As a result, it is possible to bend and shape the rectangular conductor mounted on the stator core with higher accuracy by the first roller and the punch while reducing the space and cost of the bending apparatus.

  In the above-described flat conductor bending apparatus, the pressing mechanism adjusts an initial length of the spring and a spring that generates a biasing force in a direction to separate the first holding member and the second holding member. It is desirable to have a spacer for this purpose.

  When the pressing mechanism has such a spring and a spacer, the pressing force of the first roller against the flat conductor can be adjusted. Therefore, even when the flat conductor is bent into a complicated shape, it can be formed while applying a desired load to the flat conductor, so that it can be bent with very high accuracy.

  In the above-described flat conductor bending apparatus, the holding mechanism preferably includes a roller height adjusting mechanism for adjusting a height position of the first roller with respect to the second roller.

  When the holding mechanism includes such a roller height adjusting mechanism, the height position of the first roller with respect to the second roller can be finely adjusted. Thereby, the first roller can be moved so as to follow the molding surface of the punch while reliably contacting the flat conductor. As a result, the rectangular conductor attached to the stator core can be accurately bent into a desired shape by the first roller.

  In the above-described flat conductor bending apparatus, the roller height adjusting mechanism only needs to have an adjusting screw that is screwed into the first holding member and a tip of which abuts against the second holding member. .

  With this configuration, the roller height adjusting mechanism can be realized with a very simple structure. Thereby, it is possible to improve the accuracy of the bending with respect to the rectangular conductor mounted on the stator core with a very simple structure.

  Another aspect of the present invention made to solve the above-described problem is that a punch having a molding surface formed in a desired bent shape of the flat conductor is disposed along an end surface of the stator core, and the punch A rail having a guide surface formed in the same shape as the molding surface is arranged in parallel to the punch, holds the first roller and the second roller rotatably, and moves the first roller to the second roller. A holding mechanism that is movably held in conjunction with the punch is disposed between the punch and the rail, and the holding mechanism is moved only in one direction by a moving mechanism, whereby the second roller is guided by the rail. The rectangular conductor is bent so as to follow the molding surface of the punch by moving along the surface and bringing the first roller into contact with the rectangular conductor.

  In this method of bending a rectangular conductor, a punch having a molding surface formed in a desired bending shape of the rectangular conductor is disposed along the end surface of the stator core, and a guide surface formed in the same shape as the molding surface of the punch. A rail comprising is arranged parallel to the punch. A holding mechanism holding the first roller and the second roller is disposed between the punch and the rail, and the holding mechanism is moved only in one direction (horizontal direction) by the moving mechanism. At this time, since the second roller moves along the guide surface of the rail, the rectangular conductor can be bent and shaped so as to follow the molding surface of the punch while the first roller is in contact with the rectangular conductor. In this manner, the rectangular conductor mounted on the stator core can be accurately bent into a desired shape.

  In this flat conductor bending method, the first roller (and the second roller) is held by a holding mechanism and moved in only one direction to perform copying. That is, the rectangular conductor is bent by uniaxial scanning. As a result, it is possible to accurately bend and form the rectangular conductor mounted on the stator core while saving space and reducing costs.

  According to the flat conductor bending apparatus and method according to the present invention, as described above, the flat conductor mounted on the stator core and protruding from the end face of the core can be accurately bent into a predetermined shape with a simple configuration.

It is a figure which shows schematic structure of the bending forming apparatus of the flat conductor which concerns on embodiment. It is a figure which shows typically the stator with which the flat conductor before bending molding was mounted | worn. It is a figure which shows typically the state which has arrange | positioned the 1st roller in the predetermined position. It is a figure which shows typically the state which has arrange | positioned the punch in the predetermined position. It is a figure which shows typically the state (Before contact | abutting to a flat conductor) in which the 1st roller began to move in order to bend a flat conductor. It is a figure which shows typically the state which the 1st roller contact | abutted to the rectangular conductor and started bending the rectangular conductor. It is a figure which shows typically the state by which the circular-arc-shaped convex part was formed in the flat conductor. It is a figure which shows typically the state by which the flat conductor was bent and formed in the shape which has an arc-shaped convex part. It is a figure which shows typically the stator after a flat conductor is bend-molded. It is a figure which shows the modification of a bending apparatus. It is a figure which shows the modification of the punch with which a bending apparatus is equipped. It is a figure which shows an example of the other shape which can be shape | molded with a bending apparatus.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a flat conductor bending apparatus and method according to the present invention will be described below in detail with reference to the drawings. In the present embodiment, a case will be described in which the present invention is applied to a case where a rectangular conductor mounted on a stator core is bent and formed into a shape having an arcuate convex portion (see the rectangular conductor 30a shown in FIG. 9).

  First, a bending apparatus will be described with reference to FIG. FIG. 1 is a diagram showing a schematic configuration of a flat conductor bending apparatus according to the present embodiment. As shown in FIG. 1, the bending apparatus 10 includes a punch 11, a first roller 12, a second roller 13, a rail 14, and a holding unit that holds the first roller 12 and the second roller 13. 15 and so on. In the bending apparatus 10, the rectangular conductor is bent into a predetermined shape by the punch 11 and the first roller 12. Here, only one punch (and rail) is illustrated here, but the bending apparatus 10 includes a necessary number of punches (and rails) according to the bent shape of the flat conductor.

  The punch 11 is an elongated mold for bending a flat conductor, and includes a forming surface 11a formed in a desired bent shape of the flat conductor. The opposite surface of the molding surface 11a, that is, the bottom surface 11b is flat. In the punch 11 in the present embodiment, an arc-shaped convex portion 11c is formed at one end portion. As will be described later, the punch 11 is slid inward from the outer peripheral side of the core to the end surface of the stator core, and is arranged along the end surface of the stator core.

The first roller 12 is a roller (forming roller) for bending a flat conductor, and moves along the forming surface 11 a of the punch 11 while abutting the flat conductor. Then, the rectangular conductor is copied along with the punch 11, and the rectangular conductor is bent into a predetermined shape.
The second roller 13 is a roller (guide roller) that moves along the guide surface 14 a of the rail 14, and moves in conjunction with the first roller 12.

  Here, the rail 14 guides the second roller 13, and the guide surface 14 a in contact with the second roller 13 has the same shape as the molding surface 11 a of the punch 11. And this rail 14 is arrange | positioned in parallel with respect to the punch 11, and the 2nd roller 13 moves along the guide surface 14a.

The first roller 12 and the second roller 13 described above are rotatably held by the holding unit 15. Thereby, the 1st roller 12 and the 2nd roller 13 can be moved now interlockingly.
The holding unit 15 includes a first holding member 16 that holds the first roller 12 rotatably, and a second holding member 17 that holds the second roller 13 rotatably. The second holding member 17 is pivotally supported with respect to the first holding member 16 so as to be rotatable. Specifically, the second holding member 17 is rotatably connected to the first holding member 16 by a pin 18. Thereby, the 1st holding member 16 and the 2nd holding member 17 can mutually be rotated centering on the pin 18. As shown in FIG.

The holding portion 15 is driven by a uniaxial cylinder (moving mechanism) 19. In the present embodiment, the second holding member 17 is connected to the cylinder 19, and the second holding member 17 is configured to move in the arrow direction (horizontal direction) in the drawing by driving the cylinder 19. Since the first holding member 16 is connected to the second holding member 17, the first holding member 16 moves together with the second holding member 17. Accordingly, the first roller 12 and the second roller 13 held by the holding unit 15 move in conjunction with each other.
As described above, the first roller 12 and the second roller 13 can be moved in conjunction with each other by the holding portion 15 having a very simple structure. The simplification of the holding portion 15 contributes to space saving and cost reduction of the bending apparatus 10.

  The holding portion 15 is provided with a pressing mechanism 20 for pressing the first roller 12 with a constant load against a flat rectangular conductor to be bent. As a result, the first roller 12 can always be pressed against the flat conductor with a constant load. Therefore, as will be described later, the flat conductor mounted on the stator core is accurately moved by the first roller 12 and the punch 11. It can be bent into a predetermined shape.

  Here, the pressing mechanism 20 includes a spring 21 disposed in a spring arrangement space 17a formed in the second holding member 17 by being contracted from a natural length, and a spacer 22 disposed at an end of the spring arrangement space 17a. Is equipped. One end of the spring 21 is in contact with the first holding member 16 between the first roller 12 and the pin 18, and the other end is in contact with the spacer 22 in the spring arrangement space 17a. As a result, the first holding member 16 is rotated counterclockwise in the drawing around the pin 18 by the biasing force of the spring 21, so that the first roller 12 is pressed against the flat conductor. .

  Then, by changing the thickness of the spacer 22, the initial length (shrinkage allowance) of the spring 21 can be finely adjusted, and the pressing force of the first roller 12 against the flat conductor can be adjusted. Yes. By adjusting the pressing force of the first roller 12, the rectangular conductor can be molded while applying a desired load. Therefore, the rectangular conductor can be bent into a predetermined shape with very high accuracy.

  Further, the holding portion 15 is provided with a roller height adjusting mechanism 25 for adjusting the height position of the first roller 12 (relative height position with respect to the second roller 13). The adjustment mechanism 25 is provided on the opposite side of the pin 18 from the first roller 12. With this adjustment mechanism 25, the first roller 12 can be moved so as to follow the molding surface 11 a of the punch 11 while being surely brought into contact with the flat conductor.

  Here, the roller height adjusting mechanism 25 is provided with an adjusting screw 26 that is screwed into the first holding member 16 and whose tip abuts against the second holding member 17. Thereby, by tightening the adjusting screw 26, the first holding member 16 can be rotated clockwise in the drawing, and the position of the first roller 12 can be raised. On the contrary, by loosening the adjustment screw 26, the first holding member 17 can be rotated counterclockwise in the drawing, and the position of the first roller 12 can be lowered. Thus, the roller height adjusting mechanism 25 is realized with a very simple structure.

  Next, a method for bending the flat conductor mounted on the stator core into a predetermined shape by the bending apparatus 10 described above will be described with reference to FIGS. Here, a case will be described in which the rectangular conductor mounted on the stator core is bent into a shape having an arcuate convex portion (see the rectangular conductor 30a shown in FIG. 9). FIG. 2 is a view schematically showing a stator on which a flat conductor before bending is mounted. FIG. 3 is a diagram schematically illustrating a state in which the first roller is disposed at a predetermined position. FIG. 4 is a diagram schematically showing a state in which the punch is arranged at a predetermined position. FIG. 5 is a diagram schematically showing a state in which the first roller starts to move in order to bend the rectangular conductor (before contact with the rectangular conductor). FIG. 6 is a diagram schematically showing a state in which the first roller comes into contact with the flat conductor and starts bending the flat conductor. FIG. 7 is a diagram schematically showing a state where an arc-shaped convex portion is formed on a flat conductor. FIG. 8 is a diagram schematically showing a state where the flat conductor is bent and formed into a shape having an arcuate convex portion. FIG. 9 is a diagram schematically showing the stator after the flat conductor is bent. In these drawings, a part of the flat conductor (and the stator core) is omitted.

  First, as shown in FIG. 2, the stator core 40 to which the flat conductor 30 is attached is set at a predetermined position. At this time, the flat conductor 30 protrudes from the core end surface 40a (before bending). As shown in FIG. 3, the first roller 12 is disposed at a predetermined position on the inner peripheral side of the stator core 40. Subsequently, as shown in FIG. 4, the punch 11 is disposed at a predetermined position. At this time, in the present embodiment, the punch 11 is slid along the end surface 40a of the stator core 40 from the outer peripheral side of the stator core 40 toward the inner peripheral side, and the tip of the punch 11 is bent into the rectangular conductor 30 that performs bending molding. Abut.

  Next, as shown in FIG. 5, the first roller 12 is moved toward the punch 11. Specifically, the cylinder 19 is driven to move the holding portion 15 toward the outside of the stator core 40 (in the direction of the arrow in the figure). Then, the first roller 12 comes into contact with the flat conductor 30. When the first roller 12 is further moved, the flat conductor 30 starts to bend as shown in FIG. When the first roller 12 is further moved, the first roller 12 is moved along the molding surface 11a of the punch 11 as shown in FIG. As a result, the flat conductor 30 is bent while a constant load is applied by the first roller 12. As a result, the flat conductor 30 is bent so as to follow the forming surface 11 a of the punch 11, and an arc-shaped convex portion is formed on the flat conductor 30.

  Thereafter, as shown in FIG. 8, the first roller 12 is further moved, the flat conductor 30 is formed to follow the forming surface 11 a of the punch 11, and the flat conductor 30 formed by the first roller 12 and the punch 11 is formed. The uniaxial motion profiling for is completed. Thus, the rectangular conductor 30 mounted on the stator core 40 is bent and formed into a rectangular conductor 30a having an arcuate convex portion. Thereafter, the rectangular conductors 30 are sequentially bent as described above, and as shown in FIG. 9, the rectangular conductors 30a and 30b bent into various shapes are obtained. The shape of the molding surface of the punch used for obtaining the flat conductor 30a and the flat conductor 30b is different.

  Here, the second roller 13 also moves in conjunction with the movement of the first roller 12. At this time, the second roller 13 moves along the guide surface 14 a of the rail 14. The guide surface 14 a has the same shape as the molding surface 11 a of the punch 11, and the rail 14 is disposed in parallel to the punch 11. Therefore, the first roller 12 can be moved without being separated from the rectangular conductor 30 even in the arc-shaped convex portion 11 c of the molding surface 11 a of the punch 11 simply by moving the holding portion 15 in the horizontal direction. That is, the first roller 12 can be moved so as to follow the molding surface 11 a of the punch 11 while always pressing the flat conductor 30. In this way, the bending apparatus 10 can bend and shape the rectangular conductor 30 mounted on the stator core 40 with high accuracy while performing space-saving and cost reduction by performing uniaxial copying. Can do. As a result, even a complicated shape such as the flat conductor 30a can be bent and formed with high accuracy.

  As described above in detail, according to the bending apparatus 10 according to the present embodiment, the punch 11 having the forming surface 11 a formed in the desired bending shape of the flat conductor 30 extends along the end surface 40 a of the stator core 40. The first roller 12 disposed and held by the holding portion 15 is brought into contact with the rectangular conductor 30 mounted on the stator core 40 and moved so as to follow the molding surface 11a of the punch 11 to thereby move the punch. 11 and the first roller 12 bend the rectangular conductor 30. At this time, the first roller 12 is rotatably held together with the second roller 13 by the holding portion 15 and is moved in conjunction with the second roller 13. The second roller 13 is formed in the same shape as the molding surface 11 a of the punch 11, has a guide surface 14 a, and moves along the guide surface 14 a of the rail 14 arranged in parallel to the punch 11. For this reason, the first roller can always be moved so as to follow the molding surface 11 a of the punch 11 while being in contact with the flat conductor 30. Thereby, the flat conductor 30 in a state of being mounted on the stator core 40 can be accurately bent into a desired shape.

  In the bending apparatus 10, the first roller 12 (and the second roller 13) is held by the holding unit 15 and moved only in one direction (horizontal direction) to perform copying. That is, the rectangular conductor 30 is bent by uniaxial copying. As a result, space saving and cost reduction can be achieved, and the flat rectangular conductor 30 attached to the stator core 40 can be bent and formed with high accuracy.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, only one second roller 13 and one rail 14 are provided, but two (or more) second rollers 13 and rails 14 may be provided as shown in FIG. Good. Thereby, when the 1st roller 12 gets over the circular-arc-shaped convex part 11c in the molding surface 11a of the punch 11, it can prevent the 2nd holding member 17 from inclining, Therefore With respect to the flat conductor 30 of the 1st roller 12 The pressing force can be reliably kept constant. As a result, the flat conductor 30 can be bent into a desired shape with higher accuracy.

  In the embodiment described above, the tip of the punch 11 is a flat surface. However, as shown in FIG. 11, protrusions 11d are provided at both ends of the tip of the punch 11 so that the tip of the punch 11 is flat. You may make it the shape which invites the conductor 30. FIG. Particularly, by forming the inner surface of the protrusion 11d in a tapered shape, the relative positioning between the flat conductor 30 and the punch 11 can be performed smoothly. In this way, it is possible to ensure that the flat conductor 30 is not displaced from the punch 11 during bending.

  In the above-described embodiment, the case where the flat conductor 30 attached to the stator core 40 is bent and formed into a shape having one step (arc-shaped convex portion) is exemplified. As shown in FIG. 12, the mounted flat rectangular conductor can also be applied to a case where it is bent into a shape having a plurality of steps.

DESCRIPTION OF SYMBOLS 10 Bending apparatus 11 Punch 11a Forming surface 11c Arc-shaped convex part 12 1st roller 13 2nd roller 14 Rail 14a Guide surface 15 Holding part 16 1st holding member 17 2nd holding member 18 Pin 19 Cylinder 20 Pressing mechanism 21 Spring 22 Spacer 25 Roller height adjustment mechanism 30 Rectangular conductor (before bending)
30a rectangular conductor (after bending)
40 Stator core

Claims (7)

In a flat conductor bending apparatus for bending a flat conductor mounted on a stator core to form a coil into a desired shape,
A punch having a molding surface formed in a desired bent shape of the flat conductor, and disposed along an end surface of the stator core;
A first roller that bends and forms the flat conductor so as to abut the flat conductor and follow the punch forming surface;
A rail provided with a guide surface formed in the same shape as the molding surface of the punch, and arranged in parallel to the punch,
A second roller that moves along the guide surface of the rail;
Holding the first and second rollers rotatably, holding the first roller movably in conjunction with the second roller, and a holding mechanism disposed between the punch and the rail;
A moving mechanism for moving the holding mechanism in only one direction;
An apparatus for bending a flat conductor, comprising: In the bending apparatus for a flat conductor according to claim 1,
The holding mechanism is
A first holding member for rotatably holding the first roller;
A second holding member rotatably supported with respect to the first holding member and holding the second roller rotatably;
A pressing mechanism for pressing the first roller against the flat conductor via the first holding member so that the flat conductor is bent and molded with a constant load applied by the first roller;
An apparatus for bending a flat conductor, comprising: In the flat conductor bending apparatus according to claim 2,
The pressing mechanism is
A spring that generates a biasing force in a direction to separate the first holding member and the second holding member;
A spacer for adjusting the initial length of the spring;
An apparatus for bending a flat conductor, comprising: In the flat conductor bending apparatus according to claim 2,
The flat conductor bending apparatus according to claim 1, wherein the holding mechanism includes a roller height adjusting mechanism that adjusts a height position of the first roller with respect to the second roller. The flat conductor bending apparatus according to claim 4,
2. The flat conductor bending apparatus according to claim 1, wherein the roller height adjusting mechanism includes an adjusting screw that is screwed into the first holding member and a tip of which is in contact with the second holding member. In the bending molding apparatus of any one flat conductor according to claim 2,
The second holding member holds a plurality of the second rollers at the same height position,
The flat conductor bending apparatus is characterized in that the rails are provided by the number of the plurality of second rollers. In a method for bending a rectangular conductor, in which a rectangular conductor mounted on a stator core to form a coil is bent into a desired shape,
A punch including a molding surface formed in a desired bending shape of the rectangular conductor is disposed along an end surface of the stator core, and a rail including a guide surface formed in the same shape as the molding surface of the punch, Place parallel to the punch,
A holding mechanism that holds the first and second rollers rotatably and holds the first roller in conjunction with the second roller is disposed between the punch and the rail,
By moving the holding mechanism in only one direction by a moving mechanism, the second roller is moved along the guide surface of the rail, and the first roller is brought into contact with the flat conductor to form the punch. A flat conductor bending method, wherein the flat conductor is bent so as to follow a surface.

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