JPH0449342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an armature winding forming apparatus, and particularly to an armature winding forming apparatus suitable for bending a rectangular conductor into a U-shape.

[Background of the invention]

In general, armature windings are formed of flat-wise wound conductors shaped like a tortoise shell, as shown in Figure 1, and they consist of a plurality of insulated conductors 1a, each of which has a counter-commutator. located on the side U-shaped coil head 1b and on the opposite side,
Outlet portion 1c connected to the commutator piece slit groove
2 in the core slot as shown in Figure 2.
be incorporated into.

During the forming process, the U-shaped coil head 1b is edgewise bent as shown in FIG.
That is, the width direction of the insulated conductor 1a is bent into a U-shape.

Conventionally, the U-shaped bending process of the insulated conductor 1a has been carried out by arrows CC, C', and C', as shown in FIG. 4A.
A pair of clamp devices 1 that can be transferred in the direction of the arrow C'
4c and a pair of bending devices 14b, the insulated conductor 1a is restrained in the thickness direction, and the liner 14d is rotated in the direction of arrow DD with the bending R device 14a as a reference, and the insulated conductor 1a is forcibly pushed into the groove 14f. It is bent into a letter shape.

However, with this bending method, especially when bending a rectangular insulated conductor 1a with a large thickness-to-width ratio and a wide insulated conductor 1a, that is,
As shown in FIG. 4B, when attempting to bend the insulated conductor 1a in the width direction, a pair of bending devices 14
b does not rotate following the direction of the DD arrow with the insulated conductor 1a, so the pair of bending device ends 14e and the insulated conductor 1a come into contact and are forcibly pushed in while rubbing against each other, and the insulated conductor 1a Expansion distortion occurs in the thickness direction as shown by the arrow EE. Therefore, as shown in the FF arrow part of Fig. 4C,
The insulation coating was severely damaged, and it was necessary to manually correct the distortion of the insulation coating conductor 1a after bending it into a U-shape, or to perform insulation repair winding work on the insulation coating.
This was a major obstacle in establishing an automated line.

Further, in U-shaped bending using a rectangular conductor, a bulge occurs in the thickness direction of the conductor in the same manner as described above, and after the U-shaped bending, distortion correction of the bulged portion is unavoidable by manual labor.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and its purpose is to omit the manual distortion correction of a rectangular conductor after U-shaped bending, and to provide an electrical appliance that enables automation of U-shaped bending. The present invention provides a forming device for a child winding.

[Summary of the invention]

The present invention provides a rectangular conductor for an armature coil that is cut to a predetermined length by a cutting device, and is located near the intermediate portion in the length direction of a rectangular conductor for an armature coil having a quadrilateral cross section, and is provided opposite to each other in the thickness direction of the rectangular conductor. a first R part that is higher than the direction and has a size of R necessary for U-shaped bending; a circular part that is integral with the first R part and has a width equivalent to the width direction of the conductor in the center part first pedestal,
A second R part having a bending radius equal to or larger than the outer diameter of the conductor after U-shaped bending, a circular second R part having a height equal to the thickness direction of the conductor, and a width equal to the width direction of the conductor. A bending receiving device for receiving one side of the rectangular conductor consisting of a pedestal, an R groove having the same diameter as the first R portion, and a thickness direction and width of the conductor corresponding to the first and second pedestals. A bending holding device is configured as a pair to press down the other side of the rectangular conductor consisting of a portion that restricts the direction. A bending device that rotates a bending receiving device and a holding device simultaneously to perform bending into a U-shape, and a bending device that is installed at a position that does not interfere with the bending device and that supports the conductor horizontally in the length direction and in the thickness direction. A fixing receiving device for receiving one side of the rectangular conductor having a stepped portion for supporting the conductor, and a fixing device for holding down the other of the rectangular conductor having a stepped portion for supporting the conductor corresponding to the stepped portion of the fixing receiving device. The holding device is configured as a pair, and the stepped portion of the fixing receiving device and the stepped portion of the fixing holding device restrain at least two sides of the rectangular cross section of the rectangular conductor during U-shape bending. The intended purpose is achieved by including a fixing device that prevents the rectangular conductor from moving in the longitudinal direction.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 5A shows an embodiment of the armature winding forming apparatus of the present invention, and is an example of a bending apparatus that performs U-shaped bending of the insulated conductor 1a. First, to explain each device, the bending receiving device 6B has an R portion 6 that is at least higher than the thickness direction of the insulated conductor 1a and has a size corresponding to the R required for U-shaped bending.
a, and a pedestal 6g of the insulated conductor 1a which is integrated with the R part 6a and has a circular shape in the center part equivalent to the width direction of the insulated conductor 1a, and an outer diameter R after the insulated conductor 1a is bent into a U-shape. , and a circular pedestal 6h for the insulated conductor 1a having a height equivalent to the thickness direction of the insulated conductor 1a and a circular shape equivalent to the width direction. There is. On the other hand, the bending holding device 6A is the bending holding device 6B.
and a pair of R grooves 6i equivalent to the R portion 6a, and R portions 6a, 6 of the bending receiving device 6B.
b, and the pedestals 6g and 6h, the insulated conductor 1a is configured to be restrained in the thickness direction and width direction of the quadrilateral cross section by the bending receiving device 6B.

In addition, when performing U-shaped bending of the insulated conductor 1a, the pair of bending receiving devices 6B are placed at a position where the holding device 6A does not interfere with the insulated covered conductor 1a.
In order to position the insulated conductor 1a in the length direction of a and to prevent displacement during U-shape bending, there are a fixing receiving device 6E and a holding device 6D for restraining the insulated conductor 1a.

To explain this in detail, a fixing receiving device 6E that fixes the insulated conductor 1a that receives the insulated conductor 1a horizontally and in the thickness direction in the length direction, and a pair of holding devices 6D are used to insulate the conductor 1a. Covered conductor 1a
It is possible to restrain the cross-sectional quadrilateral shape of at least two sides in the thickness direction, and the fixing press device 6D includes:
As shown in FIG. 5C, liners 6d and 6e are provided that can be moved in the directions of arrows M and M' in response to changes in the width direction of the insulated conductor 1a, and furthermore, liners 6d and 6e are provided that can be moved in the directions of the arrows M and M', and the insulated conductor 1a is bent in a U-shape. There is a guide 6f to prevent displacement in the length direction during processing.

Next, the operation of bending the insulated conductor into a U-shape will be explained.

First, an insulated conductor 1a having a quadrilateral cross section is cut into a predetermined length using a cutting device (not shown).

Then, as shown in FIG. 5A, the insulated conductor 1
The bending presser device 6A that bends the insulated conductor 1a into a U-shape is moved in the direction of arrow K, and the fixing presser device 6D that fixes the insulated conductor 1a is also transferred in the direction of arrow L to restrain each insulated conductor 1a. do. This restrained state is shown in FIGS. 5B and 5C. That is, FIG. 5B shows a state where the insulated conductor 1a is restrained by a pair of bending receiving devices 6B and a holding device 6A, and FIG. 5C shows a state where the insulated conductor 1a is restrained by a pair of fixing receiving devices 6E
This figure shows a state in which the insulated conductor 1a is restrained by the holding device 6D and the holding device 6D.

The insulated conductors 1 each restrained in this way
As shown in FIG. 5A, a is a pair of bending receiving devices 6B and a presser device 6A that move in the direction of arrow H.
Rotate 180 degrees and bend the insulated conductor 1a into a U-shape. After the U-shaped bending of the insulated conductor 1a, the bending presser 16A shown in FIG. 5B is used.
The fixing holding device 6D shown in FIG. 5C moves in the direction of the arrow K' and in the direction of the arrow L', and the insulated conductor 1a bent into a U-shape is released from the restraint. Thereafter, the bending presser device 6A shown in FIG.
The glyph bending process is completed.

The operation of bending the insulated conductor 1a into a U-shape has been explained above, but when bending the insulated conductor 1a into a U-shape, one piece or bending R
This is also a U-shaped bending device for an insulated conductor 1a, which can bend a plurality of insulated conductors 1a at the same time.

By having the configuration of this embodiment as described above,
Manual distortion correction of the conductor or insulation repair winding of the insulation coating can be omitted, and the product processing process can be shortened by simultaneously performing multiple U-shaped bending processes with different bending radii. By using it in an automatic processing line for insulated conductors, it is possible to create a molding line that produces high-quality and highly reliable products.

〔Effect of the invention〕

According to the armature winding forming apparatus of the present invention described above, the rectangular conductor for an armature coil, which has been cut into a predetermined length by the cutting device, is located near the longitudinal middle part of the rectangular conductor for armature coils and has a quadrilateral cross section. are provided facing each other in the thickness direction, are higher than the thickness direction of the conductor, and
A first R part having a size of R necessary for U-shaped bending, a circular first pedestal integral with the first R part and having a width equivalent to the width direction of the conductor in the center part; Bending radius equal to or greater than the outer diameter of the conductor after U-shaped bending
a circular second R portion having a height equivalent to the thickness direction of the conductor and a width equivalent to the width direction of the conductor;
a bending receiving device for receiving one side of the rectangular conductor consisting of a pedestal; and an R portion having the same diameter as the first R portion.
A groove, and a bending holding device that presses the other side of the rectangular conductor, which is formed of a portion that corresponds to the first and second pedestals and restrains the conductor in the thickness direction and the width direction, are configured as a pair, and the rectangular conductor is A bending device that restrains the thickness direction of the rectangular conductor and bends the width direction of a standard rectangular conductor into a U-shape by simultaneously rotating a pair of the bending receiving device and the holding device, and the bending device does not interfere with the bending device. A fixing receiving device for receiving one side of a rectangular conductor having a stepped portion provided at a position and supporting the conductor horizontally in the length direction and in the thickness direction, and a stepped portion of the fixing receiving device. and a fixing holding device that presses the other side of the rectangular conductor having a stepped portion that supports the conductor in correspondence with the part,
The stepped portion of the fixing receiving device and the stepped portion of the fixing holding device restrain at least two sides of the rectangular cross section of the rectangular conductor to prevent the rectangular conductor from moving in the length direction during U-shape bending. Since it is equipped with a fixing device that allows the conductor to be bent manually, it is possible to omit the manual distortion correction of the rectangular conductor after the U-shaped bending process.
Furthermore, it is possible to automate the U-shaped bending process, which is very effective for this type of device.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a general flat-wise wound armature coil, Figure 2 is a sectional view showing the flat-wise wound armature coil installed in the core slot, and Figure 3 is a flat-wise wound armature coil. A perspective view showing a U-shaped coil before the armature coil is formed into a tortoise shell shape.
This is an explanatory diagram of the state in which bending is being performed into a letter shape.
Figure 4A is a perspective view before U-shaped bending, Figure 4B
is a perspective view of the U-shaped pressing and bending process,
FIG. 4C is a perspective view of the conductor after being pressed into a U-shape and bent, and FIG.
FIG. 5B is an exploded perspective view of a forming device formed from a bending device for bending into a shape and a fixing device, FIG. FIG. 3 is a cross-sectional view showing a state in which the insulated conductor is restrained by the fixing device. 1... Armature coil, 1a... Insulated coated conductor,
6...Bending device, 6A...Bending presser device, 6B
...bending device, 6D...fixing presser device,
6E...Fixing receiving device.

Claims (1)

[Claims] 1 Located near the longitudinal middle part of a rectangular conductor for an armature coil having a quadrilateral cross section cut to a predetermined length by a cutting device, facing oppositely in the thickness direction of the rectangular conductor, and higher than the thickness direction of the conductor. , and the first R has a size corresponding to R necessary for U-shaped bending.
part, a circular first pedestal that is integral with the first R part and has a width equivalent to the width direction of the conductor in the center part, a bending R that is equal to or larger than the outer diameter of the conductor after the U-shaped bending. a circular second R portion having a height equivalent to the thickness direction of the conductor and a width equivalent to the width direction of the conductor;
a bending receiving device for receiving one side of the rectangular conductor consisting of a pedestal; and an R portion having the same diameter as the first R portion.
A groove, and a bending holding device that presses the other side of the rectangular conductor, which is formed of a portion that corresponds to the first and second pedestals and restrains the conductor in the thickness direction and the width direction, are configured as a pair, and the rectangular conductor is A bending device that restrains the thickness direction of the rectangular conductor and bends the width direction of a standard rectangular conductor into a U-shape by simultaneously rotating a pair of the bending receiving device and the holding device, and the bending device does not interfere with the bending device. A fixing receiving device for receiving one side of a rectangular conductor having a stepped portion provided at a position and supporting the conductor horizontally in the length direction and in the thickness direction, and a stepped portion of the fixing receiving device. and a fixing holding device that presses the other side of the rectangular conductor having a stepped portion that supports the conductor in correspondence with the part,
The stepped portion of the fixing receiving device and the stepped portion of the fixing holding device restrain at least two sides of the rectangular cross section of the rectangular conductor to prevent the rectangular conductor from moving in the length direction during U-shape bending. An armature winding forming device comprising: a fixing device for forming an armature winding;