DE2251218A1 - MACHINE FOR THE AUTOMATIC INSERTION OF SLOT INSULATION IN STATORS OR ARMATORS OF ELECTRIC MACHINES - Google Patents

Description

Otto Rist
798 Ravensburg

Machine for the automatic insertion of slot insulation in stators or armatures in electrical machines

The invention relates to a machine for automatic insertion of prefabricated slot insulation and / or cover caps or armature insulation in stators or armatures in electrical machines, whereby the workpiece to be loaded is held by a pick-up, which can be rotated step by step as part of a graduated disk.

The construction of such machines is therefore primarily of determined the endeavor, with comparatively little effort in tool costs for a stator type a sufficient performance with short To achieve changeover times to a different type «

The automatic isolation machines that have become known, however, are still in need of improvement with regard to the requirements mentioned. This is due in particular to the fact that the insulating parts have to be pushed through the receiver for the workpiece to be fitted, ie the receiving part for the stator must have as many grooves as the stator itself, since the insertion tool is below

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is arranged. As a result, the insulation strips must be pushed in through the surface of the receiving part. This must therefore with one of the groove pitch of the fitting workpiece corresponding wreath of passage openings must be provided, which must be the same in section that the Insulation strips from the tool through without hindrance - and can be pushed into the groove of the workpiece. Also is here the receiving part only for a certain diameter of the pitch circle in the workpiece and only for one certain groove size, usable. Due to these properties, a correspondingly complicated construction of the known automatic insulation system is required, which affects the procurement costs as well as the Retrofitting the receiving part has a detrimental effect.

Accordingly, the object of the present invention is to to improve a machine of the type mentioned at the outset in such a way that the defects mentioned are eliminated, with a simple one Tool for only one groove shape is necessary and the conversion is simplified.

This is achieved according to the invention in that at least two sensors are located between the index plate and the insertion tool a rotating or swiveling rotary indexing table is arranged diametrically and at the same radial distance from its axis of rotation, each with a transducer with the workpiece immediately below the insertion tool and the insulation strips to be inserted through as individual pieces in the work cycle of the indexing disk the tool can be inserted, preferably from above.

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In this arrangement, the openings fall into the Stator mounts gone. In addition, the same insertion tools can be used for different workpiece diameters with the same groove shape be used. Since the tool is exposed at the top, retooling is very simplified and retooling times are great short.

Another advantage in terms of the efficient way of working results according to the invention by such an arrangement of the stepping mechanism for the drive of the indexing disk, that only the indexing disk standing below the insertion tool is driven so that the other, stationary transducer can be provided with the workpiece to be loaded.

In the interest of a trouble-free automatic workflow, the invention makes a further proposal, according to which the The transducer is designed to be axially displaceable, the displacement being controllable so that the insulation strips during the insertion process can be passed into the groove of the workpiece without a gap, and that after completion of an insertion process the workpiece is set back from the insertion tool at a distance required for an unimpeded further movement of the workpiece will.

By this measure it is achieved that in spite of a projecting edge of the workpiece or a conditional by the beaded edge survive the insulation strip, a further rotation of the workpiece

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or swiveling out of the area of the insertion tool is possible. In the case of cast-around stators, the transducer is set back by a correspondingly greater distance before the swiveling process.

To also cover slide or anchor insulation, instead of groove insulation strips, in the grooves of the workpiece according to the same According to the invention, the insertion tool can be adjusted transversely to the axis of rotation of the transducer into a diametrical position.

This takes into account in a simple manner that that too U-shaped embossed cover slide so into the grooves of the workpiece must be inserted so that their closed side faces outwards.

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In the drawing, an embodiment of the invention is shown. - ■ .--- ·.

FIG. I shows a side view of the machine. FIG. 2 shows the plan of FIG

The rotary indexing table 2 is mounted on a base 1 so that it can pivot about an axis A (arrow BB). This table 2 carries the two partial disks 3 and 4, which are each provided with an ochalt gear rim 5 on their circumference. The pitch of these ring gears 5 corresponds to the pitch of the ring gear 6 in the workpiece 7 _r 8, which in the present example is shown as a stator of an electrical machine.

Each graduated disk 3, 4 is provided with a pick-up 9 for the workpieces 7, 8, which is non-rotatably connected to the indexing disk 3 and 4, respectively, and controlled movements in the direction of its axis of rotation (Arrow C-C).

The insertion tool 10 is arranged above the workpieces 7, 8 and provided with an insertion ram Tl, which executes controlled movements in the direction of the arrow D-D and thereby through the mouthpiece 12 pushes the insulation strips into the grooves 6.

The insertion tool TO can be adjusted transversely in the direction of the arrow E-E so that it is in a diametrical position to the axis of the under the Tool 10 stationary workpiece (e.g. 8) can be brought.

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The drive and control elements for the individual functional parts are not shown in the drawing because they are known per se and are not part of the invention.

To explain how it works, it is assumed that the Workpiece 8 is brought into its, dash-dotted line, receiving position in which the mouthpiece 12 without a gap on Workpiece, e.g. a stator with twelve slots. The receiver 9 for the other workpiece 7 has moved into its lower end position, where it stands still, and with the one to be fitted Workpiece 7 can be provided.

While the 'workpiece δ is being fitted, the indexing disk is in the Function cycle of the insertion tool 10 by a switching mechanism (not shown), the pawl of which with the gear rim 5 cooperates, rotated step by step. In this case, after each insertion process, the sensor 9 with the workpieces) moves a distance moved downwards, which is sufficient to completely lead the protruding üördelrand of the insulation strip out of the tool.

When all twelve grooves 6 are provided with insulation strips, go the transducer 9 with the stator 8 even further down, so that a possibly protruding stator edge (e.g. with cast-around stators) the now following pivoting movement of the rotary indexing table 2 in the direction of arrow B is not a hindrance.

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Through this pivoting movement, which is 180 ° with two transducers, the stator 7 is now brought into its loading position under the insertion tool 10, 11, 12, whereupon the transducer so far moves upwards until the stator 7, or the relevant slot opening, rests directly on the mouthpiece 12, and the described The assembly process can begin again. As already mentioned, the other swiveled out, stationary sensor can meanwhile 9 can be provided with a new workpiece.

As can be seen from the drawing and description, this works Insertion tool TO directly with the transducer 9 and its workpiece 7 or 8 together, so that any through openings in the stator mount are no longer required.

The flanging embossing, not shown, coupled to the insertion tool and cutting station, can also work independently in a manner known per se, so that e.g. also cover slides, anchor insulation and special insulation.

The vertical arrangement of the machine shown is not mandatory necessary because the machine does not impair its functions

horizontal
also / can be arranged. This has the additional advantage that, even with heavy and large stators, the stationary workpiece to be fitted can be picked up while the insulation parts are being pushed into the other workpiece. In such stators, which can have a total weight of 200 kp and more, the removal and placement of the stator requires a great deal of time, which is omitted in the arrangement according to the invention, since the other can be placed or picked up while the one stator is being fitted. This is the only way to make the procurement outlay for such a machine economical.

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Claims (4)

Potent claims Machine for the automatic insertion of prefabricated slot insulation and / or cover caps or armature insulation in stators or armature electrical machines, whereby the the workpiece to be loaded is held by a pick-up device, which can be rotated step by step as part of a graduated disk, characterized in that between the graduated disk (3, 4) and the insertion tool (10, 11, 12) at least two pickups (9) on a rotatable or pivotable rotary indexing table (2) diametrically and at the same radial distance of its axis of rotation (A) are arranged, in each case a pick-up with the workpiece is directly below the insertion tool and the insulation strips to be inserted can be inserted as individual pieces in the working cycle of the indexing disk through the tool, preferably from above. 2. Machine according to claim 1, characterized by such Arrangement of the indexing mechanism for the drive of the indexing disk, that only the one under the insertion tool stationary index disk is driven so that the other stationary transducer can be provided with the workpiece to be fitted. File 2750 (a) - 2 - 309843/0359 3. Machine according to the preceding claims, characterized in that the pickup (9) is designed to be axially displaceable, the displacement being controllable so that the
Isolation strips can be passed into the groove of the workpiece without a gap during the insertion process, and that after completion of an insertion process the workpiece (7, 8) in
reset a distance required for an unhindered further movement of the workpiece from the insertion tool
will. 4. Machine according to the preceding claims, characterized in that the insertion tool is transverse to the axis of rotation
The transducer is adjustable in a diametrical position. File 2750 (a) 309843/0359 Blank page