JP4278700B1 - Winding method and winding apparatus for edgewise coil - Google Patents

Abstract

An edgewise coil winding method and a winding apparatus suitable for holding a coil after winding is provided.
A bent portion of a flat wire 3 delivered every preset length is held by a fulcrum member of a main clamp 11 serving as a bending means and a vendor 12, and the flat wire 3 connected to the bending means. An edgewise coil winding method for forming an edgewise coil 4 by bending a rectangular wire 3 held by rotating the bender 12 around a fulcrum member while the supply side is fixed. The coil guide 31 is engaged with the inner peripheral side or the outer peripheral side of the edgewise coil 4 to be moved, the coil guide 31 is moved following the movement of the edgewise coil 4 by the feeding operation of the rectangular wire 3, and the bending is performed. The coil guide 31 is moved while being rotated following the movement of the edgewise coil 4 that moves while rotating in accordance with the operation.
[Selection] Figure 7

Description

  The present invention relates to a winding method and winding device for an edgewise coil that vertically winds a rectangular wire, and in particular, an edge that has been devised so as not to cause a ramp (vibration in the axial direction and radial direction) of the wound coil. The present invention relates to a winding method and a winding apparatus for a width coil.

  Conventionally, in order to improve the utilization efficiency of the winding space when a coated copper wire is wound in a coil shape, a rectangular wire with a rectangular cross-section is sequentially bent (a rectangular wire is wound in the width direction) and wound vertically. An edgewise coil winding apparatus for forming a width coil has been proposed (see Patent Document 1).

This is done by sandwiching a rectangular wire fed out for a predetermined length between a fulcrum roller rotating around the axis and a bender provided on the outer periphery of the fulcrum roller, turning the bender around the fulcrum roller, bending the rectangular wire 90 degrees, The edge wire is produced by sequentially bending the rectangular wire 90 ° by repeating the operation of extending the rectangular wire by a predetermined length, and again rotating the bender around the fulcrum roller and bending the rectangular wire 90 °. is there.
JP 2007-74881 A

  By the way, in the above-described edgewise coil winding apparatus, since the edgewise coil is wound by sequentially bending the rectangular wire by 90 degrees by the fulcrum roller and the bender, the wound coil is a rectangular wire. Each time the bending is performed, the sheet is rotated by 90 degrees around the bent portion, and is moved horizontally each time a flat wire is fed.

  For this reason, when trying to wind at high speed, the wound coil is swung in the axial direction and the radial direction as it rotates, causing a phenomenon that the coil is violated, and the deformation of the coil and the gap between the coils become large, neatly It was necessary to reduce the winding speed in order to manufacture laminated windings. In particular, at the end of the winding, the coil that has been rolled up may not be able to be wound due to inertia due to inertia and when it fluctuates or sways greatly when it is fed for a predetermined length and during rotation of the bending. In order to maintain a stable coil shape, it was necessary to reduce the winding speed.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide an edgewise coil winding method and a winding apparatus suitable for holding a coil after winding.

In the present invention, the bent portion of the flat wire sent out for each preset length is held by the fulcrum member of the bending means and the vendor, and the supply side of the flat wire connected to the bending means is fixed. An edgewise coil winding method and a winding device for forming an edgewise coil by bending a rectangular wire held by rotating a bender around a fulcrum member. Edgewise that engages the coil guide on the circumferential side or the outer circumferential side, moves the coil guide following the movement of the edgewise coil due to the feeding operation of the rectangular wire, and moves while rotating in accordance with the bending operation by following the movement of the coil, while moving the rotational center axis of the coil guided along on a moving locus relative to the involute curve to the outer diameter of said fulcrum member, carp Wherein the rotating guide.

Therefore, in the present invention, the coil guide is engaged with the inner peripheral side or the outer peripheral side of the formed edgewise coil, the coil guide is moved following the movement of the edgewise coil due to the feeding operation of the rectangular wire, In order to follow the movement of the edgewise coil that moves while rotating in accordance with the bending operation, the coil guide moves while rotating, so that the edgewise coil is moved by the coil guide that moves in the same manner as the wound edgewise coil. Can be prevented, and the coil shape can be maintained to prevent the coil from violating during winding. Moreover, since the edgewise coil that has been wound is wound downward while being sequentially regulated by the coil guide, the newly wound coil is regulated by the coil guide, and is wound by being vibrated in the axial and radial directions. The coil shape is not deformed.
In addition, the movement of the coil guide that follows the movement of the edgewise coil accompanying the bending operation of the flat wire is performed by setting the rotation center axis of the coil guide along the movement trajectory based on the involute curve with respect to the outer diameter of the fulcrum member. Since the coil guide is rotated while being moved, the coil guide can be made to accurately follow the movement of the edgewise coil that has been wound when the flat wire is bent.

  Hereinafter, a winding method and a winding device for an edgewise coil for forming an edgewise coil (hereinafter sometimes simply referred to as “coil”) according to the present invention will be described based on an embodiment. FIG. 1 is a perspective view of a winding device for an edgewise coil to which the present invention is applied.

  In FIG. 1, an edgewise coil winding apparatus 1 includes a bending unit 10 that holds a flat wire 3 by a main clamp 11 and a vendor 12 and bends it at a predetermined angle, for example, 90 degrees, and a bending unit 10. And a coil guide unit 30 that holds a frame-shaped rectangular wire 3 that is wound into a frame shape by being sequentially bent and changes its posture in a plane in accordance with the bending operation of the bending unit 10.

  Further, the presser that clamps the flat wire 3 sent to the folding unit 10 on the upstream side of sending the flat wire 3 to the bending unit 10 and prevents the folding unit 10 from being pulled out downstream by the bending operation. A unit 70; and a feed unit 50 that feeds and operates the rectangular wire 3 to the folding unit 10 by a predetermined length corresponding to the dimension of each side of the edgewise coil 4 corresponding to the winding by the bending unit 10. .

  In addition, the winding device 1 of the edgewise coil includes a horizontal strainer 83 and a rectangular wire for correcting the rectangular wire 3 drawn out from the spool 81 in the width direction by alternately sandwiching the rectangular wire 3 by a plurality of guide rollers 82 from the width direction. 3 is provided with a straightening unit 80 composed of a vertical strainer portion 85 that is alternately sandwiched by a plurality of guide rollers 84 from the thickness direction 3 and straightened in the thickness direction, and the straight wire 3 from which distortion has been removed is sent to the feed unit 50. I have to. Each of the units 10, 30, 50, 70, 80 is attached to a table 2 as a base.

The rectangular wire 3 is sent from the spool to the bending unit 10 via the correction unit 80, the feeding unit 50, and the presser unit 70, and is wound around the edgewise coil 4 by the bending unit 10. The edgewise coil 4 is held by the coil guide unit 30. Here, the direction along the flat wire 3 from the spool to the bending unit 10 is defined as the Y-axis direction, the plane direction perpendicular to the flat wire 3 is defined as the X-axis direction, and the vertical direction perpendicular thereto is defined as the Z-axis direction. To do .
The feeding unit 50 is disposed on a vertical plate 51 whose lower end is fixed to the side surface of the table 2, is disposed so as to be reciprocable by a plurality of guides 55 disposed in the Y-axis direction, and moves forward toward the folding unit 10. A feed clamp 52 that sometimes engages the flat wire 3 from the thickness direction, a feed drive mechanism 53 that reciprocates the feed clamp 52, and the feed clamp 52 when the feed clamp 52 moves forward by the feed drive mechanism 53. And a feed clamp actuating means 54 for releasing the engagement operation with respect to the rectangular wire 3 when the feed clamp 52 is retracted.

  The feed clamp 52 includes an upper plate 56 and a lower plate 57 that can be reciprocated integrally in the Y-axis direction by a plurality of guides 55. These upper and lower plates 56 and 57 are guided by sandwiching the flat wire 3 from the vertical direction. To do. As shown in FIG. 2, the upper plate 56 is held so as to be movable in the vertical direction and contacts the upper surface of the rectangular wire 3, and a spring 59 is interposed between the engagement piece 58 and the vertical direction. A pressing piece 60 that is movably disposed, and a roller 61 that is rotatably held by the pressing piece 60 are provided. A part of the roller 61 is disposed so as to protrude from the upper surface of the upper plate 56. In this state, the flat wire 3 and the engaging piece 58 are lightly in contact with each other, and the restraint on the flat wire 3 by the feed clamp 52 is released. . When the roller 61 is pushed downward by the feed clamp actuating means 54, the pressing piece 60 is lowered to urge the engaging piece 58 downward via the spring 59, and the rectangular wire 3 with the lower plate 57. The feed clamp 52 is engaged with and held by the flat wire 3 by clamping.

  The feed clamp operating means 54 includes an upper and lower plate 62 disposed on the vertical plate 51 so as to be movable up and down, and a feed clamp motor 64 that lowers the upper and lower plate 62 by a cam roller 63. The upper and lower plates 62 include a rail 65 in the Y-axis direction that engages with the roller 61 of the lowering feed clamp 52 and pushes the roller 61 downward, and includes a roller 66 that contacts the cam roller 63 above. When the feed clamp 52 moves forward, the feed clamp motor 64 lowers the upper and lower plates 62 via the cam rollers 63 and pushes the roller 61 of the feed clamp 52 by the rail 65 to engage the feed clamp 52 with the rectangular wire 3. When the feed clamp 52 moves backward, the feed clamp motor 64 raises the upper and lower plates 62 via the cam rollers 63 to separate the rail 65 from the roller 61 of the feed clamp 52 to the rectangular wire 3 of the feed clamp 52. Release the engagement.

  The feed driving means 53 includes a ball screw 67 that is arranged on the vertical plate 51 in the Y-axis direction and accumulates on the upper plate 56 of the feed clamp 52, and a feed drive motor 68 that rotationally drives the ball screw 67. . When feeding the flat wire 3, the feed driving means 53 moves the feed clamp 52 engaged with the flat wire 3 toward the bending unit 10 with the ball screw 67 and the dimensions of each side of the edgewise coil 4. The feed clamp 52 in a state in which the engagement with the rectangular wire 3 is released is moved back to the initial position when the presser unit 70 is operated in conjunction with the subsequent bending operation by the bending unit 10. Let The flat wire 3 is sent out when the feed clamp 52 is moved forward by the feed drive mechanism 53, and only the feed clamp 52 is moved back when the feed clamp 52 is moved backward.

  The feed clamp actuating means 54 has been described as raising and lowering the upper and lower plates 62 by the cam mechanism (63) operated by the feed clamp motor 64. However, the upper and lower plates 62 may be raised and lowered by an air cylinder or the like. Further, the upper and lower plates may be moved up and down by other methods.

Further, although not shown in the drawings, the feeding unit 50 may be a unit that feeds the rectangular wire 3 by driving a pair of rollers whose roller surfaces are in contact with the upper and lower surfaces of the rectangular wire 3 by a driving motor or the like. .
The presser unit 70 prevents the flat wire from being pulled out by a bending force when the flat wire is bent by the bending unit 10, and a frame for supporting the flat wire 3 arranged on the vertical plate 51 from below. A body 71, a presser plate 72 that can be moved up and down within the frame body 71, a cam 73 that lowers the presser plate 72, and a motor 74 that rotates the cam 73. When the flat wire 3 is bent 90 degrees by the bending unit 10, if a large tensile force acts in the winding direction of the flat wire 3 and the flat wire 3 is pulled out in the winding direction by this force, the edgewise The length of each side of the coil 4 varies and the coil shape is disturbed. Therefore, when the flat unit 3 is bent 90 degrees by the bending unit 10, the presser unit 70 lowers the presser plate 72 via the cam 73 by the motor 74 and clamps the flat wire 3 with the frame 71. So that it is not pulled out in the winding direction .
The bending unit 10 is extended on the table 2 from a vertical plate 13 whose lower end is fixed to the side surface of the table 2 in the same manner, adjacent to the vertical plate 51 on which the feeding unit 50 and the presser unit 70 are arranged. The main clamp 11 and the vendor 12 are provided at a position held by the upper and lower shelf plates 14 and projecting from the shelf plate 14 toward the lower table 2.

  As shown in FIG. 3, the lower shelf plate 14 includes a cylindrical portion 14A that protrudes toward the table, and a plurality of cylindrical members 15 that constitute the vendor 12 are provided inside the cylindrical portion 14A ( In the example shown in the figure, two axially arranged bearings 15A are rotatably supported in a state in which axial movement is restricted. Further, a cylindrical member 17 constituting the main clamp 11 is rotatably supported in a cylindrical member 15 in a state where axial movement is restricted by a plurality of bearings 15B (two vertically arranged in the illustrated example). Prepare. As will be described later, the rotation of the columnar member 16 and the cylindrical member 17 is prevented.

  As shown in FIGS. 3 and 4, the main clamp 11 is accommodated in the cylindrical member 17 and the cylindrical member 17 through spline fitting or the like, and is rotatable integrally with the cylindrical member 17 and is axially moved. Includes a column member 16 that can move independently.

  The lower end of the columnar member 16 protrudes from the lower end of the cylindrical member 17 and is exposed, and a flange 18 that supports the flat wire 3 from below is integrally formed at the lower end. A gap is formed between the upper surface of the flange 18 and the lower end surface of the cylindrical member 17 to constrain the upper and lower surfaces of the flat wire 3. The flat wire 3 is accommodated in the gap and the exposed column member 16 is a fulcrum at the time of bending. A main clamp 11 is formed as a member. The radius of the columnar member 16 that forms the fulcrum member is formed to coincide with the radius of curvature of the partial arc formed at the corner of the coil guide 31 described later.

The upper end of the front Symbol cylindrical member 16 is connected to the liftable frame 22 via the connecting means 21, fixed with the roller 23 is rotatably supported on the frame 22, the shelf plate 14 to the roller 23 The cam 25 rotated by the main clamp motor 24 is engaged. The connecting means 21 is connected to the column member 16 and the frame body 22 and can be moved up and down integrally, and the rotation of the frame body 22 is prevented so that the column member 16 and the column member 16 are spline-fitted. The rotation of the cylindrical member 17 is also prevented. The connecting means 21, the frame 22, the roller 23, the cam 25, and the main clamp motor 24 constitute a main clamp operating mechanism 20.

  When the rectangular wire 3 is bent, the cam 25 is rotated by the main clamp motor 24 of the main clamp operating mechanism 20 to raise the roller 23, and the integrated frame 22 is pulled up via the connecting means 21. The cylindrical member 16 is pulled up, and is positioned at a clamping position where the flat wire 3 is sandwiched between the upper surface of the lower flange 18 as the main clamp 11 and the lower surface of the cylindrical member 17. In this way, the flat wire 3 is sandwiched and pressed from above and below at the time of bending, thereby preventing the flat wire 3 from being bulged at the time of bending. The space between the upper surface of the flange 18 and the lower end of the cylindrical member 17 has a minimum dimension set by a space plate 19 disposed at the lower end of the cylindrical member 17 and inserted into the gap.

  Further, when the main clamp motor 24 of the main clamp operating mechanism 20 is rotated and the roller 23 is lowered by the cam 25, the frame body 22 is lowered integrally, and the column member 16 is lowered via the connecting means 21, The gap between the upper surface of the flange 18 at the lower end and the lower end surface of the cylindrical member 17 is enlarged, the restraint of the main clamp 11 with respect to the flat wire 3 is released, and it is positioned at the clamp release position.

  Note that the flange 18 (the columnar member 16) may be pulled up by, for example, an air cylinder or the like without using the above-described cam mechanism (22 to 25) as the main clamp operating mechanism 20. The flange 18 (columnar member 16) may be moved up and down by a method.

Before SL to the lower end of the cylindrical member 15, and the upper and lower pieces 12A in contact with the outer peripheral side surface of the side opposite to the side that is held in the gap of the main clamp 11 of the rectangular wire 3, the cylindrical member 17 and the flange from the upper and lower ends of the upper and lower pieces 12A A U-shaped bender 12 having a protruding piece 12 </ b> B protruding toward the inner peripheral side toward 18 is fixed. On the main clamp 11 side, the upper and lower surfaces of the flat wire 3 are guided by the upper surface of the flange 18 and the lower end surface of the cylindrical member 17, and the side surfaces thereof are guided by the outer periphery of the columnar member 16 constituting the fulcrum member. On the side, the side surfaces and the upper and lower surfaces are guided by the upper and lower pieces 12A and the protruding pieces 12B of the vendor 12. The upper surface of the flange 18, the outer periphery of the columnar member 16 constituting the fulcrum member, the lower end surface of the cylindrical member 17, and the upper and lower pieces 12 </ b> A and the protruding pieces 12 </ b> B of the vendor 12 are rectangular wires that guide and bend the flat wire 3. 3 accommodating portions are formed.

A gear 27 is fixed to the upper end of the cylindrical member 15, and a gear 29 fixed to the spindle of a bending motor 28 fixed to the shelf plate 14 is engaged. The bending motor 28 rotates the cylindrical member 15 by 90 degrees from the initial position via the meshing gears 27 and 29, bends the rectangular wire 3 held in the accommodating portion by 90 degrees, and again the cylindrical member. Rotate 15 by 90 degrees and operate to return to the initial position .
The coil guide unit 30 includes a coil guide 31 that holds the edgewise coil 4 wound in a frame shape by being sequentially bent by the bending unit 10, and a plane along with the bending operation of the bending unit 10. A coil guide cradle 33 having a coil guide rotation mechanism 32 for rotating the coil guide 31 in response to a frame-shaped rectangular wire 3 whose posture changes, and a table 2 on the coil guide cradle 33 as the coil guide 31 rotates. And an XY movement table 34 for changing the plane position of the.

  As shown in FIGS. 5 and 6, the coil guide 31 is a shaft portion of a large bevel gear 35 that constitutes the coil guide rotation mechanism 32 that is disposed on the coil guide receiving base 33 so as to be rotatable around the Z axis by a bearing. The lower part is accommodated in the holding case 36 incorporated in the housing and is prevented from coming off, and the portion exposed to the upper part from the holding case 36 is substantially equal to the inner peripheral shape of the edgewise coil 4 by the wound rectangular wire 3. It is formed in an outer peripheral shape. The square portion of the coil guide 31 is formed in a partial arc shape, and the radius of curvature thereof is formed to coincide with the radius of the columnar member 16 that forms the fulcrum member of the bending unit 10.

Before Symbol coil guide 31, the longitudinal direction of the dividing plane while being divided into two from the center, it is urged away from each other by the inserted spring 37 between the divided surfaces, pressed against the inner surface of the holding case 36 Extended state. The coil guide 31 in the holding case 36 is formed on a pair of narrowed slopes 38A that are separated from the inner surface of the holding case 36 as both side surfaces in the longitudinal direction move downward. A pair of upwardly extending slopes 38B provided on a stopper 39 provided so as to be movable up and down within 36 is engaged.

  The stopper 39 is integrally provided with a shaft 39A extending through the shaft portion of the large bevel gear 35 and extending downward, and a motor 41 fixed to the coil guide cradle 33 via a thrust bearing 40 at the lower end of the shaft 39A. Are connected to a slider 41 that moves up and down. That is, the motor 41 is configured to rotationally drive the ball nut 42 to raise and lower the ball screw 43 screwed into the ball nut 42 and to raise and lower the slider 41 connected to the ball screw 43. The stopper 39, the shaft 39A, the thrust bearing 40, the slider 41, the ball nut 42, the ball screw 43, and the motor 41 constitute a coil guide contraction mechanism 44. Therefore, when the slider 41 is lifted by the motor 41 of the coil guide contracting mechanism 44, the shaft 39A is lifted and the stopper 39 is lifted, and the coil guide 31 divided in two is expanded by the engagement between the inclined surfaces 38A and 38B. Therefore, the width dimension can be reduced.

  As will be described later, the coil guide 31 holds the rectangular wire 3 wound around the coil guide 31 and is wound by reducing the width dimension by the coil guide contraction mechanism 44 as described above. The coil is dropped to a lower position on the coil guide 31 and gradually contracts as the winding advances, so that trapezoidal coils are stacked and wound.

Large bevel gear 35 constituting the front Symbol coil guide rotation mechanism 32 is contained in a coil guide cradle 33, Y-axis side of the coil guide cradle 33 (or X-axis) is rotatably disposed about a coil guide It meshes with a small bevel gear 46 that is rotated by a rotary motor 45. Therefore, by rotating the small gear 46 by the coil guide rotation motor 45, the large bevel gear 35 functions to rotate about the Z axis, and the coil guide 31 functions to rotate about the Z axis.

Before SL XY moving table 34, Y-axis direction along the Y axis slider 47C by rotating the ball screw 47A which is arranged to penetrate the frame member 34A which is fixed on the table 2 in the Y-axis direction by the Y-axis motor 47B The Y-axis table 47D that moves in the X direction and the ball screw 48A arranged in the X-axis direction on the Y-axis table 47D is rotated by the X-axis motor 48B to move along the X-axis slider 48C in the X-axis direction. Axis table 48D. The coil guide cradle 33 is fixed on the X-axis table 48D.

  FIG. 7 shows the moving state of the coil guide 31 in the XY plane. When the rectangular wire 3 is bent with respect to the long side of the edgewise coil 4, the coil guide 31 has its center position positioned at P1. Located along the solid line, as the long side of the edgewise coil 4 is bent, its center position is moved from P1 to P2 and rotated around the Z axis, and its center position is moved to the wavy line as P2. To do. Then, for bending the short side of the edgewise coil 4, the position of the coil guide 31 is positioned at P3 which is moved in the Y-axis direction from P2, and the bending of the short side of the edgewise coil 4 is started. .

  Next, when the flat wire 3 is bent with respect to the short side of the edgewise coil 4, the coil guide 31 is positioned at the center of the coil guide 31 as shown by the broken line, and as the short side of the edgewise coil 4 is bent. The center position is rotated around the Z-axis while moving from P3 to P4, and the center position is moved to the wavy line as P4. For the bending of the long side of the edgewise coil 4, the position of the coil guide 31 is positioned at P1 moved in the Y-axis direction from P4, and the bending of the long side of the edgewise coil 4 is started. .

  By repeating the above operation, the edgewise coil 4 formed by being bent by the bending unit 10 is operated to be held by the coil guide 31. During the movement from P1 to P2 and the movement from P3 to P4, the movement is not performed on the illustrated straight line, but is moved with a movement locus by an involute curve, as will be described later.

  The operation of the edgewise coil winding device having the above configuration will be described below.

  First, the flat wire 3 is pulled out from the spool 81, passed between the horizontal and vertical strainers 83 and 85, the upper plate 56 and the lower plate 57 of the feed unit 50, and passed through the frame 71 of the presser unit 70, Guide to the folding unit 10.

  In the bending unit 10, the upper surface of the flange 18 of the main clamp 11, the outer periphery of the columnar member 16 constituting the fulcrum member, the lower end surface of the cylindrical member 17, and the upper and lower pieces 12 </ b> A and the protruding pieces 12 </ b> B of the vendor 12 are configured. The opening direction of the accommodating portion of the flat wire 3 is directed in the Y-axis direction, and the flange 18 of the main clamp 11 is lowered by the main clamp operating mechanism 20 so that the holding portion of the flat wire 3 is opened. Then, the end of the flat wire 3 is inserted into the gap between the flange 18 of the main clamp 11 and the cylindrical member 17, and the flat wire 3 is positioned by the U-shaped bender 12 from the outer peripheral direction. The tip of the flat wire 3 is accommodated in the accommodating portion.

  Next, the feed clamp motor 64 of the feed unit 50 is rotated, the convex portion of the cam 63 is brought into contact with the roller 66 of the upper and lower plates 62, the upper and lower plates 62 are lowered, and the rails 65 of the upper and lower plates 62 are fed. The roller 61 is lowered by coming into contact with a rotatable roller 61 protruding from the upper plate 56, and the flat wire 3 is fixedly clamped by the engagement piece 58 and the lower plate 57.

  Then, the ball screw 67 is rotationally driven by the feed drive motor 68 to move the feed clamp 52 composed of the upper plate 56 and the lower plate 57 forward, and feed the rectangular wire 3 by a predetermined length. The flat wire 3 protrudes further to the tip side than the accommodating portion of the bending unit 10.

  Then, the motor 74 of the presser unit 70 is operated to lower the presser plate 72 to clamp the rectangular wire 3, and the feed clamp motor 64 of the feed unit 50 is rotated so that the concave portion of the cam 63 is moved to the rollers of the upper and lower plates 62. 66, the upper and lower plates 62 are raised, the rails 65 of the upper and lower plates 62 are separated from the rollers 61 of the feed clamp 52, the rollers 61 are raised, the pressing force to the engagement pieces 58 is released, and the rectangular wire is released. Then, the ball screw 67 is rotationally driven by the feed drive motor 68, and the feed clamp 52 constituted by the upper plate 56 and the lower plate 57 is moved backward to return to the initial position. In this case, the flat wire 3 maintains the stopped state.

  Next, the coil guide 31 is moved by the XY moving table 34 and rotated by the coil guide rotating mechanism 32, and as shown in FIG. 8, the side surface of the rectangular wire 3 protruding ahead of the housing portion is XY. The flat wire 3 and the coil guide 31 are spaced apart from each other on the plane (the rectangular wire 3 and the coil guide 31 are spaced apart in the Z-axis direction), and the corner (partial arc) of the coil guide 31 is formed into the cylindrical member 16. The fulcrum member formed in the step is separated from the fulcrum member by a predetermined distance A in the Y axis direction. The predetermined distance A in the Y-axis direction is such that the flat wire 3 is wound around the fulcrum member (the corner of the coil guide 31 that is partially arcuate) (at the center of the flat wire 3). Set by. Therefore, this length dimension is changed according to the winding length around the surface of the fulcrum member (the length of the partial arc at the corner) and the width dimension of the flat wire 3.

  In this state, the main clamp operating mechanism 20 of the bending unit 10 is operated to raise the flange 18 of the main clamp 11, and the accommodating portion of the flat wire 3 is narrowed in the vertical direction to be in a clamped state, as shown in FIG. Then, the folding motor 28 is rotated to rotate the cylindrical member 15 by 90 degrees, the bender 12 is rotated 90 degrees around the fulcrum member (main clamp 11 which is prevented from rotating), and the rectangular wire 3 is folded 90 degrees. Bend.

  In parallel with this, the coil guide 31 is similarly rotated about the Z axis by the coil guide rotation motor 45 of the coil guide rotation mechanism 32, and the center of the coil guide 31 is moved 90 degrees with respect to the fulcrum member by the XY moving table 34. The rectangular wire 3 bent on the side surface of the coil guide 31 on the XY plane is kept substantially in contact with the XY plane by moving in the XY direction with a trajectory of the involute curve wound only by the degree. To move.

  When the flat wire 3 is bent by 90 degrees, tension is applied to the flat wire 3 by the frictional force with the bender 12, but the flat wire 3 is held by the presser unit 70. The coil wire is not pulled out when the flat wire 3 is bent, and the coil shape does not become unstable.

  Further, when the flat wire 3 is bent by 90 degrees, the flat wire 3 contracts on the inner peripheral side of the bend, so that if the flat wire 3 is not pressed hard, it swells, but the main clamp 11 of the bending unit 10 is operated by the main clamp. The mechanism 20 is driven as a clamping position, and a pressing force is applied to the flat wire 3 from above and below to prevent the flat wire 3 from expanding beyond its dimensions.

  Next, the main clamp operating mechanism 20 of the bending unit 10 is operated to lower the flange 18 of the main clamp 11, and the accommodating portion of the rectangular wire 3 is expanded in the vertical direction so that the clamp is opened, as shown in FIG. Then, the cylindrical member 15 is reversed 90 degrees by the bending motor 28, and the vendor 12 is rotated 90 degrees around the fulcrum member to return to the original position.

  FIG. 11 shows the movement locus of the coil guide 31 when the flat wire 3 is bent. The coil guide 31 before starting the bending of the flat wire 3 is indicated by a solid line, and is positioned so that the long side is in contact with the flat wire 3 extending along the cylindrical member 16 that is a fulcrum member of the main clamp 11. Its center is located at P1. The coil guide 31 after the flat wire 3 is bent is indicated by a broken line, and the long side is brought into contact with the bent flat wire 3 (broken line), and the center thereof is located at P2. Then, the center position of the coil guide 31 is moved from P1 to P2 by the XY movement table 34 with a movement locus indicated by a chain line, and is rotated by the coil guide 31 rotating mechanism from the solid line illustrated state to the wavy line illustrated state. . In addition to the surface of the fulcrum member, the movement trajectory indicated by the chain line is relative to the imaginary bending radius in which the thickness up to the neutral surface for bending the flat wire 3 (the surface on which neither compression force nor tensile force acts during bending) is added. Thus, it has an involute curve trajectory for winding the rectangular wire 3 by 90 degrees.

  Next, the next bending operation for forming the edgewise coil 4 is started. That is, the clamp 74 of the rectangular wire 3 is released by operating the motor 74 of the presser unit 70 to raise the presser plate 72.

  Then, the feed clamp motor 64 of the feed unit 50 is rotated, the convex portion of the cam 63 is brought into contact with the roller 66 of the upper and lower plates 62, the upper and lower plates 62 are lowered, and the rail 65 of the upper and lower plates 62 is moved to the feed clamp 52. The roller 61 is lowered by contacting the rotatable roller 61 protruding from the upper plate 56, and the rectangular wire 3 is fixedly clamped by the engagement piece 58 and the lower plate 57. Then, the ball screw 67 is rotationally driven by the feed drive motor 68 to move the feed clamp 52 composed of the upper plate 56 and the lower plate 57 forward, and feed the rectangular wire 3 by a predetermined length. Then, the presser plate 72 is lowered by operating the motor 74 of the presser unit 70 to clamp the flat wire 3, and as described above, the feed unit 50 is returned to the initial state with the flat wire 3 opened. .

  As shown in FIG. 12, the flat wire 3 protrudes by a predetermined length further toward the distal end side than the accommodating portion of the bending unit 10. Further, in synchronization with the feeding of the flat wire 3, the coil guide 31 is also moved in the Y-axis direction so as to keep a state of being substantially in contact with the side surface of the flat wire 3. The predetermined length is obtained by adding the length of the straight portion of the edgewise coil 4 and the coil length when bending 90 degrees (the above-described length A wound around the central axis).

  Then, again, the main clamp 11 is clamped by the main clamp operating mechanism 20, the rectangular wire 3 is clamped from above and below, the vendor 12 is rotated about the axis again, and the coil guide 31 is similarly centered on the Z axis. While being rotated, it is moved in the XY directions so that the flat wire 3 is substantially in contact with the side surface of the coil guide 31 (FIG. 13).

  Next, the main clamp operating mechanism 20 of the bending unit 10 is operated to lower the flange 18 of the main clamp 11 so that the accommodating portion of the rectangular wire 3 is expanded in the vertical direction so that the clamp is opened. The member 15 is inverted 90 degrees, and the vendor 12 is rotated 90 degrees around the fulcrum member to return to the original position (FIG. 14).

  Subsequently, as shown in FIGS. 15 and 16, at the straight portion of the edgewise coil 4, the pressing of the flat wire 3 by the main clamp 11 is released, and the flat wire 3 is fed out by a predetermined length by the feed clamp 52, and the edgewise is obtained. The edgewise coil 4 can be manufactured by pressing the flat wire 3 with the main clamp 11 at the bent portion of the coil 4 to prevent the flat wire 3 from bulging during bending and continuing the winding. it can.

  Further, the coil guide 31 is wound substantially in contact with the continuously wound rectangular wire 3 and the wound edgewise coil 4, thereby restricting the deflection of the edgewise coil 4 and winding at high speed. Even in this case, it is possible to prevent the wound edgewise coil 4 from moving and moving in the axial direction (vertical direction) and the radial direction (outer peripheral direction).

  In the embodiment described above, the main clamp 11 does not rotate. However, the upper end connecting means 21 is constituted by a thrust bearing that allows rotation, and the cylindrical member 17 constituting the main clamp 11 is replaced by the cylindrical member 15. The cylindrical member 15 and the cylindrical member 17 may be integrally rotated without interposing the bearing 15B. Further, in the state where the bearing 15B between the cylindrical member 17 and the cylindrical member 15 constituting the main clamp 11 is interposed, the upper end connecting means 21 is constituted by a thrust bearing that allows rotation, and the cylindrical member 15 and the cylindrical member 17 (cylindrical member 16) may be freely rotated without being constrained to each other.

Also, the coil guide 31 described above, the trapezoidal edgewise coil 4 when the windings, each one turn of the coil, by reducing the coil guide 31 which is bisected by the coil guide contraction mechanism 44, the coil guide 31 Since it is rolled down to the upper lower position, it is possible to continuously perform trapezoidal winding, and the wound coil is regulated by the coil guide 31 and is stable even during high-speed movement. The coil itself does not move in the radial direction (peripheral direction) together with the coil guide 31.

  In this case, since the outer peripheral shape of the coil guide 31 becomes smaller for each turn, the distance between the cylindrical member 16 that is the rotation center axis of the main clamp 11 and the coil guide 31 and the 90 ° folding. Since the involute curve shape, which is the movement trajectory of the coil guide 31 during bending, constantly changes, the program for setting the movement trajectory becomes complicated, but basically, a predetermined value is set for each turn. This can be realized by making changes.

  In the above embodiment, the coil guide 31 is wound around the trapezoidal edgewise coil 4. However, for example, if the edgewise coil 4 has the same outer diameter at the beginning and end of winding, the dimensions are the same. 17 and 18, a coil receiver 90 that receives a winding start end portion of the edgewise coil 4 wound around the coil guide 31 by the flat wire 3 and moves downward for each winding is provided. It is good also as a structure to provide. In this coil guide 31, it is not necessary to divide | segment by the division part of a longitudinal direction. When the coil receiver 90 that moves downward is provided for each turn of the coil in this way, the coil that has been wound is restricted by the coil guide 31 and is stable even during high-speed movement in the axial direction (vertical direction). ) Or in the radial direction (peripheral direction) and not be violated.

  Actually, in the first few turns, the weight of the coil is light, and even if it is wound at a high speed, the coil will not be violated. , 20, even if the operation program of the bending unit 10 is set so that a slight gap is formed between the coil guide 31 and the inner circumference of the coil, the coil Since it is housed in the coil guide 31 due to its weight, the coil is regulated by the coil guide 31 even if the winding is performed at a high speed thereafter, and the coil is not violated.

  Further, the coil guide 31 may restrict the coil not from the inner periphery but from the outer periphery or both, and the positional relationship with the bending unit 10 is upside down, that is, the coil guide 31 is a vendor. However, the coil guide 31 may be positioned above the vendor 12 and the vendor 12 may be disposed below.

  In the present embodiment, the following effects can be achieved.

  (A) The bent portion of the flat wire 3 sent out for each preset length is held by the fulcrum member of the main clamp 11 as a bending means and the bender 12, and the flat wire 3 connected to the bending means An edgewise coil winding method for forming an edgewise coil 4 by bending a flat wire 3 held by rotating a bender 12 around a fulcrum member with a supply side fixed, and is formed as described above. The coil guide 31 is engaged with the inner peripheral side or the outer peripheral side of the edgewise coil 4, the coil guide 31 is moved following the movement of the edgewise coil 4 by the feeding operation of the rectangular wire 3, and the bending operation is performed. Accordingly, the coil guide 31 is moved while being rotated so as to follow the movement of the edgewise coil 4 that moves while rotating. For this reason, the coil guide 31 that moves in the same manner as the edgewise coil 4 to be wound restricts the swing of the edgewise coil 4, maintains the coil shape, and prevents the coil from ramping during winding. Further, since the wound edgewise coil 4 is wound downward while being sequentially regulated by the coil guide 31, the newly wound coil is regulated by the coil guide 31 and vibrates in the axial and radial directions. The wire coil shape is not deformed.

  (A) The movement of the coil guide 31 that follows the movement of the edgewise coil 4 accompanying the bending operation of the flat wire 3 is performed along the movement locus on the basis of the involute curve with respect to the outer diameter of the fulcrum member. Since the coil guide 31 is rotated while moving the rotation center axis of the coil, the coil guide 31 can be accurately moved against the movement of the edgewise coil 4 that has been wound when the flat wire 3 is bent by the bending unit 10. 31 can be made to follow.

  (C) The movement trajectory based on the involute curve is corrected by changing the virtual outer diameter of the fulcrum member according to the width dimension of the flat wire 3 used for the edgewise coil 4. 3, the coil guide 31 can accurately follow the movement of the edgewise coil 4 that has been wound when the rectangular wire 3 is bent by the bending unit 10.

  The winding method and winding device of the edgewise coil of the present invention are not limited to those constituting a stator, but can be used for, for example, those constituting a single coil or those constituting another armature.

The perspective view which shows schematic structure of the edgewise coil winding machine which shows one Embodiment of this invention. A schematic sectional view of a feed clamp. Sectional drawing of a bending unit. The perspective view of a main clamp. The perspective view of a coil guide. The schematic sectional drawing of a coil guide unit. Explanatory drawing explaining the movement state in the plane of a coil guide. The operation figure explaining the winding state by a winding device. FIG. 9 is an operation diagram illustrating a winding state following FIG. 8 by the winding device. The operation | movement figure explaining the winding state following FIG. 9 by a winding apparatus. Explanatory drawing explaining the movement locus | trajectory of a coil guide. FIG. 11 is an operation diagram illustrating a winding state following FIG. 10 by the winding device. The operation | movement figure explaining the winding state following FIG. 12 by a winding apparatus. FIG. 14 is an operation diagram illustrating a winding state following FIG. 13 by the winding device. The operation | movement figure explaining the winding state following FIG. 14 by a winding apparatus. FIG. 16 is an operation diagram illustrating a winding state following FIG. 15 by the winding device. The perspective view which shows the 1st modification of a coil guide. Sectional drawing of the coil guide unit shown in FIG. The perspective view which shows the 2nd modification of a coil guide. Sectional drawing of the coil guide unit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Winding device of edgewise coil 2 Table 3 Rectangular wire 10 Bending unit 11 Main clamp 12 Vendor 30 Coil guide unit 31 Coil guide 50 Feed unit 70 Presser unit 80 Correction unit

Claims (4)

The bending portion of the flat wire sent out for each preset length is held by the fulcrum member of the bending means and the bender, and the vendor is supported with the supply side of the flat wire connected to the bending means fixed. An edgewise coil winding method for forming an edgewise coil by bending a rectangular wire held by rotating around a member,
Engage the coil guide on the inner periphery or outer periphery of the edgewise coil to be formed,
The coil guide is moved following the movement of the edgewise coil by the feeding operation of the flat wire,
Following the movement of the edgewise coil that moves while rotating in accordance with the bending operation, the rotation center axis of the coil guide is moved along the movement trajectory based on the involute curve with respect to the outer diameter of the fulcrum member. A winding method for an edgewise coil , wherein the coil guide is rotated . Movement trajectory relative to the said involute curve, depending on the width of the rectangular wire used in the edgewise coil, to claim 1, characterized in that to correct by changing the outer diameter of the virtual fulcrums member The winding method of the edgewise coil of description. A bending means for holding the bent portion of the flat wire by the fulcrum member and the bender, and bending the flat wire held by rotating the bender around the fulcrum member, and a length set in advance for the flat wire to the bending means. An edge for forming an edgewise coil by bending a rectangular wire, comprising: a feeding means that feeds the sheet at a time; and a holding means that fixes and holds a rectangular wire connected to the bending means during the bending operation of the bending means. Wise coil winding device,
A coil guide that engages with an inner peripheral side or an outer peripheral side of an edgewise coil formed by bending a rectangular wire by the bending means;
Moving the coil guide with movement of the edgewise coil by feeding behavior before Symbol feeding means, following the movement of the bent edgewise coil that moves while rotating in association with operation of the folding means, the An edgewise coil winding comprising coil guide moving means for rotating the coil guide while moving the rotation center axis of the coil guide along a movement locus based on an involute curve with respect to the outer diameter of the fulcrum member. Wire device . Movement trajectory relative to the said involute curve, depending on the width of the rectangular wire used in the edgewise coil, to claim 3, characterized in that to correct by changing the outer diameter of the virtual fulcrums member The winding device of the edgewise coil as described .