METHOD FOR PRODUCING AN ARRANGEMENT FOR A PLUG-IN COIL OF AN ELECTRIC MACHINE, GRIP APPARATUS AND MANUFACTURING

Abstract

A method is presented for producing an arrangement for a plug-in coil of an electric machine, having the following steps: providing an arrangement of coil elements, which each are embodied as a rod-shaped coil element and are pre-aligned with one another; gripping the arrangement of coil elements by way of a grip apparatus, wherein the grip apparatus grips the arrangement of coil element by way of a first grip device in a first grip plane and by way of a second grip device in a second grip plane which is arranged beneath the first grip plane and at a distance therefrom; holding the arrangement of coil elements by way of the grip apparatus and inserting legs of the coil element into allocated grooves of a core; and releasing the grip apparatus from the arrangement of coil elements.

Claims

1. A method for producing an arrangement for a plug-in coil of an electric machine, comprising the following steps: providing an arrangement of coil elements, which are each provided as a rod-shaped coil element and are pre-positioned relative to one another; gripping the arrangement of coil elements by using a grip apparatus, wherein the grip apparatus grips the arrangement of coil elements using a first grip device in a first grip plane and a second grip device in a second grip plane, which is arranged beneath the first grip plane and is arranged spaced apart therefrom; holding the arrangement of coil elements by means of the grip apparatus and inserting legs of the coil elements into allocated grooves of a core; and releasing the grip apparatus from the arrangement of coil elements.

2. The method according to claim 1, wherein, when gripping the arrangement of coil elements, an initial grip distance between the first and the second grip plane is changed to a grip end distance which is greater than the initial grip distance; and the legs of the coil elements, when increasing the grip distance between the first and the second grip plane, are clamped using the first grip device , and, are guided in a non-clamping manner and so as to support the pre-positioning relative to one another in the second grip device.

3. The method according to claim 2, wherein, the legs of the coil elements are clamped using the second grip device when the grip end distance is set.

4. The method according to claim 1, wherein, during the insertion of the leg ends of the coil elements into the allocated apertures of the core, an initial insertion distance between the first and the second grip plane is changed to an insertion end distance, which is smaller than the initial insertion distance; and when changing the insertion distance, the legs of the coil elements are clamped using the first grip device and are guided in a non-clamping manner and so as to support the pre-positioning relative to one another in the second grip device.

5. The method according to claim 4, wherein, the grip apparatus is released from the arrangement of coil elements when the insertion end distance is reached.

6. The method according to claim 1, wherein the first and/or the second grip device hold the coil elements by means of clamping and/or grip elements, which, during gripping, are arranged on the outer and/or inner side with respect to the arrangement of coil elements.

7. The method according to claim 1, wherein the first and/or the second grip device hold the coil elements by means of clamping and/or gripping elements, which are formed in a circumferentially continuous manner with respect to the arrangement of coil elements.

8. The method according to claim 1, wherein the first and/or the second grip device hold the coil elements by means of clamping and/or gripping elements, with respect to which sections of the coil elements are arranged in allocated receptacles of the clamping or gripping elements after the gripping/clamping.

9. The method according to claim 1, wherein the grip apparatus grips the arrangement of coil elements in such a way that the first grip plane and the second grip plane are arranged in the area of the legs of the coil elements.

10. The method according to claim 1, wherein the insertion of the coil elements into the grooves of the core is supported using allocated insertion aids, which are inserted into the grooves.

11. The method according to claim 1, wherein a material electrically insulating the coil elements in the grooves is held using the grip apparatus when inserting the coil elements into the grooves of the core.

12. A grip apparatus for gripping and holding an arrangement of pre-positioned coil elements for a plug-in coil of an electric machine, comprising: a first grip device configured to grip in a first coil plane an arrangement of coil elements, which are each provided as a rod-shaped coil element and are pre-positioned relative to one another; and a second grip device configured to grip the arrangement of coil elements in a second grip plane, which is arranged beneath the first grip plane and spaced apart therefrom; wherein the first and the second grip device are configured to hold the arrangement of coil elements and to insert legs of the coil elements into allocated grooves of a core.

13. The grip apparatus according to claim 12, wherein a distance between the first and the second grip device can be set for setting the distance between the first and the second grip plane.

14. A manufacturing apparatus for producing an arrangement for a plug-in coil of an electric machine, comprising: a pre-positioning unit which, to form an arrangement of coil elements, is configured to receive the coil elements for pre-positioning; an insertion unit configured to receive a core for inserting legs of the coil elements of the arrangement of coil elements into grooves of the core; and a grip apparatus according to claim 12 or 13 configured to remove the arrangement of coil elements from the pre-positioning unit, to pass it to the insertion unit, and to hold and guide it there during insertion into the grooves of the core.

15. The manufacturing apparatus according to claim 14, wherein a centering apparatus configured to center the grip apparatus during insertion of the legs of the coil elements into the grooves of the core with respect thereto.

Description

DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0033] Further exemplary embodiments will be described in more detail below with reference to figures of a drawing, in which

[0034] FIG. 1 shows a schematic perspective illustration of an arrangement comprising an apparatus for pre-positioning or pre-aligning coil elements for a plug-in coil of an electrodynamic machine;

[0035] FIG. 2 shows a schematic detail illustration of the apparatus from FIG. 1 in section at the beginning of the receiving of an arrangement of pre-positioned or pre-aligned coil elements with the help of a grip apparatus;

[0036] FIG. 3 shows a schematic detail illustration of the apparatus from FIG. 1 at a later point in time while removing the arrangement of pre-aligned coil elements;

[0037] FIG. 4 shows a schematic illustration of the apparatus from FIG. 1 after the complete removal and gripping of the arrangement of pre-positioned coil elements;

[0038] FIG. 5 shows a schematic perspective illustration of an apparatus for inserting or threading coil elements into grooves of a core for a plug-in coil of an electrodynamic machine;

[0039] FIG. 6 shows a schematic perspective detail illustration of the apparatus from FIG. 5;

[0040] FIG. 7 shows a further schematic perspective detail illustration of the apparatus from FIG. 5;

[0041] FIG. 8 shows another schematic perspective detail illustration of the apparatus from FIG. 5;

[0042] FIG. 9 shows a further schematic perspective illustration of the apparatus from FIG. 5 and

[0043] FIG. 10 shows a schematic detail illustration with an arrangement of clamping or gripping jaws, by means of which legs of coil elements are gripped.

[0044] FIG. 1 shows a schematic perspective illustration of an apparatus for pre-aligning or pre-positioning coil elements 1, which are provided as rod-shaped or hairpin-shaped coil elements, for example comprising a U-shape. The embodiment shown in FIG. 1 is provided as a double station comprising a first and a second pre-positioning or pre-aligning unit 2, 3. The first and the second pre-positioning unit 2, 3 each have a circumferential arrangement of plug receptacles 4, 5, which are formed with tubular receptacles 4a, 5a. The coil elements 1 are each inserted into the receptacles 4, 5 with one leg. An opposite leg of the respective coil element is received in an allocated groove 6 of a guide plate 7, wherein the allocated groove 6 has a curved shape. To form an arrangement of pre-aligned or pre-positioned coil elements, the guide plate 7 is rotated, wherein the coil elements 1 tighten, so that a basked-like arrangement of the coil elements 1 is formed, in which the coil elements 1 are pre-positioned or pre-aligned.

[0045] The illustration in FIG. 1 shows a grip apparatus 20, by means of which the arrangement of pre-aligned or pre-positioned coil elements 1 can be received and displaced. FIGS. 2 to 9 show this in more detail. Herein, FIGS. 2 to 4 relate to the removal of the coil elements 1 after the pre-alignment or pre-positioning thereof. FIGS. 5 to 9 show the insertion or threading of legs of the coil elements 1 into grooves 21 of a core 22 for a plug-in coil of an electric or electrodynamic machine, either for a stator or a rotor.

[0046] According to FIGS. 2 to 4, the grip apparatus 20 has a first (upper) grip device 23 and a second (lower) grip device 24, which are each formed with inner and outer clamping or gripping elements 23a, 23b; 24a, 24b. To remove (unthread) the arrangement of coil elements 1, the latter is clamped or gripped, respectively, in an upper section 25a with the help of the first grip device 23, and is guided out of the receptacles 4, wherein the second grip device 24 does not clamp the coil elements 1 thereby, but guides them, whereby the pre-positioning or pre-alignment of the coil elements 1 is secured while being pulled out.

[0047] According to the illustration in FIG. 4, the second grip device 24 is then located in the lower section 25b of legs 8 of the coil elements 1 and clamps them, so that the arrangement of coil elements 1 can be displaced away from the location of the pre-positioning or pre-alignment with the help of the grip apparatus 20 (see FIGS. 2 to 4), for example to the location of the insertion or threading of the coil elements 1 in the core 22, which is shown in FIGS. 5 ff.

[0048] FIG. 5 shows a schematic perspective illustration of an apparatus for introducing the coil elements 1 in the grooves 21 of the core 20, wherein the arrangement of coil elements 1 is meanwhile held and guided by means of the grip apparatus 20.

[0049] FIG. 6 shows a sectional illustration for the apparatus from FIG. 5. Servomotors 26, 27 serve to operate the clamping elements 23a, 23b; 24a, 24b. The core 22 is held with the help of a clamping device 28 for the insertion of the legs 8 of the coil elements 1. To synchronously drive the clamping or gripping elements 23a, 23b; 24a, 24b, respectively, a further guide plate 23c, 24c is in each case allocated to the first and the second grip device 23, 24.

[0050] An arrangement for insertion aids 30 is shown beneath the core 22, which, in the shown exemplary embodiment, are provided as insertion lances and are inserted into the grooves 21 of the core 21, so as to support the threading or insertion of legs 8 of the coil elements 1 from the top.

[0051] According to FIG. 7, the insertion aids 30 are initially arranged beneath the core 22. FIG. 8 then shows the insertion aids 30, which are inserted in the grooves 21, in the inserted state. During the subsequent threading or insertion of the legs 8 of the coil elements 1, the insertion aids 30 are moved back continuously or bit by bit (see FIG. 9), in particular synchronously for introducing or inserting in the legs 8, so that the legs 8 of the coil elements 1 are guided during the insertion into the grooves 21. Herein, the feed force is transferred to the coil elements 1 with the help of the first (upper) grip device 23, whereas the second grip device 24 does not clamp the legs 8 of the coil elements 1, but guides them, so as to maintain the pre-positioning or pre-alignment during the threading or insertion into the grooves 8.

[0052] FIG. 10 shows a schematic detail illustration with an arrangement of clamping or gripping jaws 40, . . . , 43, by means of which legs 8 of the coil elements 1 are gripped. An arrangement comprising three clamping or gripping jaws 40, . . . , 43 is shown. A clamping or gripping/holding jaw 40 located on the inside can be formed on a gearwheel 44, in such a way that a rigid bearing surface is provided, and comes to rest on a longitudinal side 45 of one of the legs 8. Clamping or gripping/holding jaws 41, 42, 43, which are embodied conically and comprising a step 46, engage with spaces 47 and come to rest on the legs 8 on narrow sides 48 as well as on an opposite longitudinal side 48.

[0053] The features disclosed in the above description, the claims, as well as the drawing, can be significant for the realization of the various embodiments, both alone and in any combination.