JPH0345621B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for forming and inserting groove insulating paper in a rotating electric machine core.

As shown in FIG. 1, a device for inserting a groove insulating paper 3 into a core groove 2 of a fixed core 1 in a rotating electrical machine has conventionally had the configuration shown in FIGS. 2 to 5. That is, in these FIGS. 2 to 5, reference numeral 4 denotes a hoop material that becomes the groove insulating paper 3, 5 denotes a roller that feeds out this hoop material 4 by a predetermined length in a direction perpendicular to the groove direction of the core groove 2, 6 and 7 are upper and lower cutters, 8 is an R punch for pressing and molding the hoop material 4 cut by these cutters 6 and 7 into an R molding die 9, and 12 is an extruding groove insulating paper 3 that has been formed. , this indexing jig 14 is passed through a drawing die 13 that narrows the iron core into a groove shape, and is passed through a guide hole 14C of the indexing jig 14.
This is a pusher that is inserted into the core groove 2 of the core 2 which is positioned and held by the mandrel 14a of the jig 14 with a key 14b. This is done by controlling the rotation angle of the output gear 15.

However, in the case of this conventional configuration, the feed roller 5
stops after feeding the hoop material 4 by a predetermined length equivalent to 2 in a direction perpendicular to the groove direction of the core groove 2, and at this point, the upper cutter 6 is moved up and down to cut this hoop material 4, and at the same time, the radius R The R punch 8 having a tip shape of ₂ is moved up and down to push the cut grooved insulating paper 3 into the R mold 9. This R molding mold 9 consists of a split mold that combines left and right molds 9a and 9b, and inside the mold there is an upward stop 9C, a pusher groove 9d, an R molding surface 9e with a radius R ₁ ,
A drawing surface 9j is formed, and the grooved insulating paper 3 that has passed through the drawing surface 9j is molded so as to follow the R forming surface 9e, and both ends of the paper are held by the rising stop 9C by spring back to form the mold. left inside. Next, the pusher 12 moves forward and sends out the grooved insulating paper 3 in the mold through the drawing die 13, but at this time, both ends of the grooved insulating paper 3 pass through the drawing die 13.
While passing through the inner core, the opening is narrowed from X ₁ to X ₂ as shown in FIG. 4, and the indexing jig 14 is inserted into the core groove 2 through the guide hole 14C. In this insertion mode, the groove insulating paper 3 is slightly protruded from both ends of the core groove 2, and at the same time as the pusher 12 is retreated, the fixed core 1 is moved by one groove along with the indexing jig 14. The above operations are repeated in sequence to form and insert the groove insulating paper 3 one after another.

Since the conventional device is configured in this way, the shape of the core groove of the fixed core 1 is determined by the groove shoulder widths (L _A , L _B , L _C ) and the groove depth (H _A , H _B ,
H _C ) and groove bottoms R (R _A , R _B , R _C ) of the core grooves 2a, 2b, 2c, which change respectively, cutters, bunches, forming dies, drawing dies and indexing jigs are required each time. We had to manufacture all the tools, and spend time changing setups to replace these parts. That is, a large amount of time is required when production is not possible, and the manufacturing cost of related parts becomes high. For this reason, in the case of models that are produced in small numbers, manufacturing jigs one by one will not produce any return on investment.
It was necessary to manually insert grooved insulating paper that had been cut to a predetermined size in advance.

In view of these drawbacks of the conventional technology, the present invention has made the cutter part independent so that any delivery length can be obtained, and the mold is a planar mold that can be used in combination with all shapes, regardless of the R shape of the core groove bottom. In addition to forming it on the lower surface of the molding, there are multiple levels of rising stops at both ends of the groove insulating paper corresponding to the depth of the core groove, and the drawing die is also limited to restraining both ends of the groove insulating paper, and the groove is removed from the drawing die. By adopting a structure in which the insulating paper is directly inserted into the core groove, the present invention aims to provide a groove insulating paper forming and inserting device that can be used for all different core groove shapes using the same jig.

Hereinafter, one embodiment of the apparatus for forming and inserting grooved insulating paper according to the present invention will be described in detail with reference to FIGS. 7 to 11.

This embodiment device is suitable for cases where the groove shoulder width, groove depth, and groove bottom R are different, as seen in the core grooves 2a, 2b, and 2c shown in FIGS. 6a, b, and c. Then, attach the corresponding groove insulating paper 3a, 3 to each groove.
This is a case where parts b and 3c are cut and formed and inserted, and in each of these embodiment drawings, the same reference numerals as in the conventional example drawings indicate the same or corresponding parts.

In FIG. 7, reference numerals 17 and 18 are upper and lower cutters for cutting the hoop material 4 fed out in a direction perpendicular to the groove direction of the core groove 2, and the upper cutter 17 has a plurality of cutters fixed to the lower cutter 18. The guide bar 19 is received in the bearing 20 so that it can slide up and down, and the cutting operation is performed by the cutter presser 1.
6 and return spring 21, each cutter 17, 18 moves the R punch 8 to the center of the mold 22 by 1/1 of the cutting length. It is configured so that A corresponding to 2 can be arbitrarily changed or selected. The mold 22 has a molding lower surface 22c for positioning the lower R tip of the grooved insulating paper 3a to be molded, and a drawing side surface 22.
a, a contact side surface 22b that maintains the molded state, and a plurality of upward stops 22e to 22g following this.
A pusher groove 22d parallel to the molding lower surface 22c is formed between the molding lower surface 22c and the contact side surface 22b. This mold 22
is the core groove 2 positioned at the groove insulation paper insertion position.
The lower molding surface 22c is positioned on the same plane as the bottom surface of the molding member. Furthermore, as shown in FIGS. 8 and 9, a drawing die 23 is attached to the front surface of the forming die 22 with bolts 24, and its vertical position can be adjusted using a long hole 23c to correspond to the depth of the grooved insulating paper 3. There is an aperture guide 23 inside the mold.
a and an aperture 23b are formed.

Note that the pusher 12 used in the device of the present invention
is configured to protrude slightly forward from the aperture die 23 when the groove insulating paper is fed. That is, the grooved insulating paper 3a that has been fed to the feeding end position by the pusher 12 has its rear end edge drawn by the drawing die 23.
It will be located further forward, and that portion will protrude from the fixed iron core 1. This groove insulating paper 3
The dimension of the portion protruding from the fixed iron core 1 at point a is designated as Y in FIG. Further, in the front part of the drawing die 23, as shown in FIGS. 9 and 10, there is a slide drawing die 31 that holds both ends of the grooved insulating paper 3 and squeezes it.
, which forms a diaphragm 31a and is supported by a guide block 32 so as to be vertically slidable. In this slide drawing die 31, the front face of the drawing part having the drawing part 31a faces the opening edge of the groove insulating paper insertion side in the iron core groove with a small distance from the fixed iron core 1, and is provided at the upper end thereof. cam follower 34
is engaged in the cam groove 33a of the grooved cam 33, and is configured to move forward and backward in the centripetal direction (vertical direction) of the fixed iron core 1 by a predetermined dimension by rotation of the grooved cam 33, and this predetermined dimension is It is indicated as Z in Figure C. Note that this dimension Z means that even if the fixed iron core 1 rotates when indexing the fixed iron core 1, the groove insulating paper 3
The aperture 31a of the slide aperture die 31 is designed to prevent the protruding Y dimension portion of the fixed iron core a from colliding with the aperture 31a of the slide aperture die 31 and being destroyed.
The dimensions are set to raise the height. Further, the fixed iron core 1 is held at a predetermined position on a mandrel 36 by a positioning key 35, and the mandrel 36 is pivotally supported by a slide bearing 37, and its indexing is performed by an indexing gear 38.

In this embodiment, a case will be described in which a groove insulating paper 3a is formed and inserted into the core groove 2a shown in FIG. 6a. First, when the hoop material 4 is sent out by a predetermined length equivalent to 2A by the feed roller 5, this hoop material 4 is cut between it and the lower cutter part 18 by the vertical movement of the upper cutter 17, and at the same time, the R punch 8 is The grooved insulating paper 3a that has been lowered and cut is pushed into the mold 22 and molded. That is, the grooved insulating paper 3a formed between the R punch 8 and the drawn side surface 22a has its lower end R outer surface in line contact with the formed lower surface 22c at the lower end position of the R punch 8, and the information is Both ends are locked by spring backs to the abutting side surface 22b, and are not ultimately held in the mold in a U-shape as shown in FIG.

Next, the R punch 8 moves up leaving the groove insulating paper 3a in the mold 22, and when it leaves the mold 22, the pusher 12 moves into the pusher groove 22.
d as a guide, and gradually push the groove insulating paper 3a in the mold 22 into the drawing mold 23,
In this drawing die 23, the grooved insulating paper 3a gradually changes its shape from an outwardly opening shape to an inwardly closing shape, especially at both ends thereof, by the drawing guide 23a, and as shown in FIG. It is completely formed up to the aperture 31a, and the end portion is inserted into the core groove 2a, leaving an amount corresponding to the dimension Y in the aperture 31a. After that, the pusher 12 moves backward, the grooved cam 33 rotates, and the slide drawing die 31 is released in the centripetal direction by an amount corresponding to the dimension Z, and then the index gear 38 indexes the core groove 2a by one groove, During this time, the upper cutter 17 returns to prepare for the next operation, and this operation is repeated in sequence to form and insert the groove insulating paper 3a into each core groove 2a.

In other words, the slide drawing die 3 corresponds to the dimension Z.
1, it is possible to avoid interference between the groove insulating paper 3a and the slide aperture die 31 when indexing the core groove 2a, and the end of the groove insulating paper 3a can be inserted into the aperture 31a by an amount corresponding to Y. By leaving
At the time of indexing, the end of the groove insulating paper 3a is drawn into the drawing die 2.
3 can be prevented from coming into contact with it.

Further, the drawing die 23 and the slide drawing die 31 in the above embodiment may be integrated into a single drawing die 25 as shown in FIG. 11. In this case, the fixation of the drawing die 25 to the forming die 22 may be abolished, and the drawing die 25 itself may be made to be able to slide up and down in the same manner as described above by means of the support portion 26 extending upwardly.

In the above embodiment, a case was described in which the groove depth, the groove shoulder width, and the groove bottom R of the core groove are arbitrarily accommodated. Needless to say, the present invention can also be applied to not only fixed cores but also movable cores.

As described in detail above, according to the device of the present invention, the cutter section consisting of the upper and lower cutter sections is made independent so that the cutting length of the grooved insulating paper from the hoop material can be adjusted. In order to accommodate the core groove shape of
A molded part is provided with a stopper formed on each side and a multi-step upward stop, and a mold is provided to squeeze the molded groove insulating paper into the core groove shape, and the groove insulating paper is directly inserted into the core groove from this drawing die. Because of this structure, it is possible to commonly form and insert groove insulating paper into a plurality of core grooves with different shapes using a single forming die and drawing die.
There is no need to prepare a device configuration for each rotating electric machine core, especially each jig, and there is no need to make preparations for inserting the same, the device itself can be provided at a low cost, and the core groove shape is different. In each case, the groove insulating paper can be formed and inserted efficiently.

[Brief explanation of drawings]

Fig. 1 is a front view showing the main parts of the rotary electric machine stator core, Fig. 2 is a side sectional view showing the general configuration of the conventional device, Fig. 3 is a partial front view of the feeding, cutting, and forming parts of the same as above, and Fig. 4 The figure is a front view of the same drawing die, and Figure 5 is the second drawing die.
6 is a partial front view of the iron core part (upper half) and the indexing jig part (lower half) seen from the direction of arrow A in the figure;
b and c are front views respectively showing the core groove shapes targeted by this invention, FIG. 7 is a partial front view of the feeding, cutting, and forming parts according to an embodiment of the invention,
Figures a, b, and c are front explanatory views showing the relationship between the core groove and the shape of the groove before inserting the insulating paper according to the aperture die position corresponding to the core groove in Figure 6, and Figures a, b, and c are the same as above. A side cross section showing a forming die and a drawing die according to an embodiment,
10 is a side sectional view of the entire device according to the embodiment, and FIG. 11 is a side sectional view of a modified example of the same. 1... Fixed iron core, 2... Core groove, 3... Groove insulating paper, 4... Hoop material, 5... Feeding roller, 6,
7 and 17, 18... Upper and lower cutter, 8... R punch, 9, 22... Molding die, 22
a...Aperture side, 22b...Abutting side, 22c...
... Lower surface of molding, 22d ... Pusher groove, 22e,
22f, 22g... Ascent stop, 12... Pusher, 13, 23, 25... Drawing die, 23a... Drawing guide, 23b... Throttle, 33... Groove cam, 3
8... Index gear.

Claims (1)

[Claims] 1. A groove insulating paper forming/inserting device for forming and inserting groove insulating paper cut from hoop material into the core groove of a rotating electric machine iron core, the device being a device for forming and inserting groove insulating paper into the core groove of a rotating electrical machine iron core, the paper being inserted into a feed roller in a direction perpendicular to the groove direction of the core groove. The cutter part consists of an upper and lower cutter whose cutting position is adjustable to cut the hoop material sent out in predetermined lengths, and the R punch with the tip R arc surface which pushes the cut grooved insulating paper into the molding part. The tip R of the grooved insulating paper is pushed into the molding part by this R punch.
The molding has a bottom surface that receives and positions the part, a side surface of the drawing, a side surface that maintains the molded state, and a multi-stage stopper formed on each side to which both ends of the grooved insulating paper are moored. A mold is formed between a mold, a drawing mold provided at the front part of the forming mold, which receives the molded groove insulating paper from a drawing guide and narrows it into a shape corresponding to the core groove shape, and the lower molding surface and the contact side of the mold. By repeating forward and backward movements using the pusher groove as a guide, the groove insulating paper formed in the mold is pushed out from the molding part and squeezed through the drawing die, and both ends in the insertion direction are made to protrude from the rotating electric machine iron core to form the core groove. and a pusher to be inserted into the rotary electric machine core, and the throttle part of the aperture type is arranged to face the opening edge of the groove insulating paper insertion side of the core groove with a small distance from the rotary electric machine core, and the rotary electric machine core At the time of indexing, even if the rotating electric machine iron core rotates, a lifting device is connected to raise the drawing die to a position where the protruding portion of the groove insulating paper from the rotating electric machine iron core does not collide with the drawing die. A device for forming and inserting groove insulating paper in a rotating electric machine iron core, characterized in that: