JP2695935B2 - Coil forming equipment - Google Patents

Description

The present invention relates to a finish forming method and a finish forming apparatus for a coil end portion of a stator coil of a rotating electric machine.

[Conventional technology]

In the conventional method, both coil ends of a stator coil are formed simultaneously as described in Japanese Utility Model Publication No. 60-15421. Further, as described in JP-A-60-176442, a structure is used in which a plurality of pieces are used to form the inner and outer diameters of the coil end, and both coil ends are simultaneously formed as in the above publication. I was

[Problems to be solved by the invention]

The above-mentioned prior art is advantageous for models with large production volumes, but does not take into account various types of small-volume production products, and has a configuration that requires a lot of time for setup, reducing delivery time and work in process. This was a problem in planning.

Further, the coil forming machine requires a large forming force when forming the coil, and therefore has a rigid structure, and is expensive and large, including a driving unit. Further, the inner diameter expansion piece and the outer diameter pressing piece which are divided into a plurality of pieces for forming must both be formed at the same time because both coil ends must be formed at the same time.

However, many small-sized products, especially large-sized stators, often require a lot of time in the preceding process. On the other hand, in the coil forming process, if the stator is set at a predetermined position, the coil is formed automatically, and since it takes almost no time,
In reality, it was time to operate expensive facilities with excess capacity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coil forming machine that can cope with multiple models without setup or back setup.

Another object of the present invention is to provide an inexpensive coil forming machine.

[Means for solving the problem]

According to the present invention, in order to achieve the above object, the coil ends of the stator coil are formed one by one, and an auxiliary plate is provided so that the coil does not move in the stacking direction of the stator at the time of forming. is there. By using this auxiliary plate, it is possible to use one molding tool and the other molding tool properly, thereby facilitating the compatibility with the models.

Another object of the present invention is to provide a forming machine for forming a coil one side at a time by reducing the number of driving sources and forming tools by almost half.

[Action]

Normally, when the coil is formed on only one side, the coil moves in the stator slot and escapes to the other side, so that the coil is not formed and it is difficult to obtain a predetermined forming dimension. When molding the coil, it is possible to obtain a sufficient molding dimension for suppressing the movement of the coil by applying the auxiliary plate to the other coil end. The other coil end molding may be performed by rotating the stator.

When forming the coil end, it is conceivable that the coil end may be deformed inward by the force applied by the auxiliary plate to the coil.However, the auxiliary plate should be placed with the same shape as the coil end to prevent this and improve reliability. Can be. At this time, the shape of the piece can be not only a trapezoidal shape from the inside but also a shape that can be regulated from the outside and the height direction of the coil end.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to FIG.

A plurality of inner diameter forming pieces 3, 16 for expanding and forming from inside the coil ends 2a, 2b of the coil 2 inserted into slots of the stator laminated iron plate 1 (hereinafter, core), and a mechanism for expanding the inner diameter forming pieces 3, 16 7, 20 and their driving sources 8, 21 and the driving sources 6, 19 for pressing the coil ends 2a, 2b from outside.
Forming plates 9 and 22 for regulating the coil end heights of the coil ends 2a and 2b to which the plurality of outer shape forming pieces 4 and 17 guided by the guides 5 and 18 are attached. And is moved by the drive sources 11 and 23 between the coil forming position and the retreat position. The guide 10 is spaced by the substrates 12 and 27 on the gantry 13.

An auxiliary plate 14 is guided by a guide 10 between the formed plates 9 and 22, and is disposed between one coil end and one formed plate. The auxiliary plate 14 is moved by the drive transmission means 15,
The power source 24 is transmitted to the drive transmission means 15 by a transmission 25.

Further, the core 1 into which the coil 2 is inserted is transported on the transport table 26.

Next, the operation will be described. The core 1 is transported on a transport platform 26 to a predetermined molding position. In FIG. 1, it is assumed that the molding is performed using the molded plate 9 when the core diameter is small, and the molded plate 22 is used when the core diameter is large.

The forming plate 9 is moved in the direction of the core 1 by the driving source 11. The auxiliary plate 14 is moved in the direction of the core 1 by the drive transmission means 15 by the power source 24 so that the timing at which the forming plate 9 touches the coil end 2a becomes the same. Coil end 2
When the heights of a and 2b are held down to predetermined positions, the forming plate 9 and the auxiliary plate 14 stop moving. Next, at the same time when the inner diameter forming piece 3 is expanded by the expansion mechanism 7 of the drive source 8, the drive source 6
As a result, the coil end 2a is formed by the outer shape forming piece 4 guided and moved by the guide 5. Next, the inner diameter forming piece 3
A mechanism (not shown) by releasing the drive source 8 and the expansion mechanism 7;
For example, the expansion molding is released by a spring or the like, and the dimensions before expansion are obtained. The inner diameter forming piece 3 repeats this operation once or several times,
finish. When the final molding of the inner diameter expansion molding is completed, the auxiliary plate 14 returns to the position before molding, and the outer molding piece 4 is
And returns to the position before molding. With the above operation, the molding of one side 2a of the coil end is completed. The coil end 2b is formed in the same manner by reversing the stator.

Here, the movement of the forming plate 9 depends on the driving source 11, but the speed at the time of forming the height of the coil end 2a (core laminating direction) can be changed by using a driving source capable of position control, When the lamination width of the core 1 changes, the moving distance can be automatically changed by inputting the lamination width to a control panel (not shown).

It goes without saying that the same can be said for the auxiliary plate 14 and the movable plate 22.

Here, when the core diameter changes, the auxiliary plate 14 moves to a predetermined position located between the coil end 2a and the forming plate 9, and the coil end 2b moves the forming plate 22 corresponding to each part when the core diameter is small. , Inner diameter forming piece 16, outer shape forming piece 17, and auxiliary plate
14 operate and mold as in the case where the core diameter is small. When the core lamination width is changed thereafter, it is necessary to change the moving position of the forming plates 9 and 22 and the auxiliary plate 14. As a method, a spacer can be used.
It is easy according to the current sensor technology to automatically respond to a change during lamination by using numerically controllable ones for the motors 11 and 23 and the drive source 24. The coil end 2a is formed. By using the auxiliary plate 14 in this way, molding with different core diameters can be performed without setup, and the number of molding pieces can be reduced by half.
There is an effect that the equipment operation time can be improved.

When the auxiliary plate 14 hits the coil end 2b and receives the force of the driving source 11 through the coil end 2b, the coil end 2b is applied to the auxiliary plate so that the reaction force does not deform the coil end 2b.
Auxiliary pieces 28 and 29 (FIG. 2) having substantially the same shape as a and 2b may be provided. Although this auxiliary piece fits inside 28, 29 of the coil end 2b as an example, the same effect can be obtained by arranging it in an annular shape on the outside 28 ', both inside and outside. FIG. 7, FIG.
The operation shown is the same as the operation described above.

FIG. 3 shows the plane of the auxiliary plate. The drive source 24 is the transmission 25
However, when it is difficult for one drive transmission unit 15 to respond to a large force (holding force) applied to the auxiliary plate 14, two or more drive transmission units can be used. At this time, the transmission 25 may be a timing belt, a chain, or the like.

FIG. 4 shows an embodiment relating to the movement of the auxiliary plate 14. A cylinder 30 with a numerical control is used as a drive source of the auxiliary plate 14, and the pusher 31 pushes the auxiliary plate 14 at one or several places. When the molding is completed, when returning, the stopper 32 is fitted into the groove 31a provided in the pressing portion 31 by the driving portion 31, and the returning power is transmitted to the auxiliary plate 14.

By the way, the core 1 can be transported by hand, but if an operator sets the carrier 1 in front of the molding machine, the core 1 can be automatically transported to a predetermined place, and the molding on one side is completed. Then, it is possible to turn over and return to the core set position after completing the other molding. In this way, the combination of the molding machine and the transport unit is performed without any discussion.

FIG. 5 shows another embodiment. When the core 1 is set, the auxiliary plate 14 is at a position 14 'by a hanging tool (not shown). After setting the core 1, the auxiliary plate 14 is set by sliding in the guide groove of the shaft 34 with the handle 38 and the like.
The shaft 34 is connected to a drive source 35 that draws the auxiliary plate 14 toward the core 1 during molding. The forming is the same as the operation described above after the setting of the auxiliary plate 14. Needless to say, the above-described concept of the transport is also conceivable.

Here, the auxiliary plate 14 was attached to the guide of the shaft 34.However, the supply direction of the auxiliary plate 14 and the method of connecting the auxiliary plate 14 to the driving means are manually attached by bolts.
It goes without saying that there is a method of connection.

Further, as for the method of attaching the auxiliary pieces 28 and 29 to the auxiliary plate 14, it goes without saying that there are various methods of screwing and bonding to the auxiliary plate. The material may be metal or hard resin, and may be essential. The auxiliary plate 14 may be made of metal, wood or the like. Thus, the weight can be reduced and the workability can be improved.

According to the present invention, by using the auxiliary plate 14 to form the coil ends one by one, the configuration of the apparatus can be reduced by half, the floor space can be reduced, and the forming pieces and the driving unit can be reduced by half. Has the effect of being obtained at low cost.

In the above, the embodiment has been described by using the horizontal type apparatus. However, it is clear that the same effect can be obtained even in the case of the rigid type.

〔The invention's effect〕

As described above, according to the present invention, by providing the auxiliary plate,
There is an effect that coil forming of stators having different core diameters can be performed without any setup. In addition, by forming the coil ends one by one, there is an effect that the number of pieces to be replaced can be reduced by half when equipment and the like are reduced by half, and the floor space is reduced by half.

[Brief description of the drawings]

1 is a front view of an apparatus showing one embodiment of the present invention, FIG. 2 is a front view of an apparatus showing another embodiment of the present invention, FIG. 3 is a front view of an auxiliary plate of the present invention, FIG. 5 is a front view showing a further embodiment of the driving method according to FIG. 2, FIG. 5 is a front view showing another embodiment of the present invention, and FIG. 6 is a side view of FIG.
FIG. 7 is a sectional view of an embodiment of the auxiliary plate according to the present invention. 1: core, 2: coil, 2a, 2b: coil end, 3.16: inner diameter forming piece, 4.17: outer diameter forming piece, 5.18: guide, 6.8.
11.19.21.23.24.30.33.35: drive source, 7.20: expansion mechanism, 9.22: molded plate, 10: guide, 12.27: substrate, 13: stand, 14: auxiliary Plate, 15: drive transmission means, 25: transmission, 26: carrier, 28, 29: auxiliary piece, 31: pusher, 32: stopper, 34: guide, 37: support, 38: handle

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-162743 (JP, A) JP-A-50-70802 (JP, A) Real opening 1986-38875 (JP, U)

Claims (2)

(57) [Claims] At least two or more pieces for extending and molding the coil end of a stator coil of a rotating electric machine from the inside, and at least two or more pieces for pressing and forming the coil end of a stator coil of a rotating electric machine from the outside. In a stator coil forming apparatus, a forming tool including a portion for forming a height of a coil end in a thickness direction of a stator of a rotating electric machine is arranged corresponding to a coil end forming of a stator coil. The molding tool provided on one side of the molding position of the coil end of the child coil has a different molding dimension to correspond to a different type of stator than the molding tool provided on the other side. An auxiliary plate for preventing movement of the coil in the thickness direction of the coil when forming the coil end is arranged between the other forming tools, and the one-side forming tool and the auxiliary plate are disposed between the one forming tool and the auxiliary plate. One and the other of the coil ends of the stator are formed one by one by inverting the stator by the forming tool, and the stator is formed of a different type corresponding to the other forming tool having a different dimension from the stator. The stator is configured such that one end and the other of the coil ends of the different type of stator are formed one by one by inverting the stator between the other forming tool and the auxiliary plate by the other forming tool. A coil forming apparatus. 2. The auxiliary plate according to claim 1, wherein the auxiliary plate is provided with a piece having substantially the same shape as the coil end so as to be positioned at the center of the coil end in order to prevent the coil end from being deformed in the radial direction of the stator. The coil forming apparatus according to claim 1, wherein: