MXPA00008978A - Method and device for producing a wave winding for stators or rotors of electric engines - Google Patents

Abstract

In the inventive device, a wire (18) is guided by means of a wire guiding device (20) and is wound onto a shaped body (10) of a template (10, 12) which can be rotationally driven. Said shaped body (10) is provided with recesses (16). The wire is cyclically pressed into the recesses (16) during the rotation of the template (10, 12) by means of outer forming elements (12) which can be driven radially. The wave-shaped coil windings are then converted into longitudinal slits of a coil receiver (34) which is axially positioned in front of the forming body (10). Said coil receiver (34) is rotationally fixed in a substantial manner during the winding movements. The aim of the invention is to produce complete winding movements over the circumference in a simple manner. The end of the last winding of a wave winding is formed by means of an additional inwards movement of at least one forming element (12) when said last winding is placed in a swing angle position of the template (10, 12) that is different to the swing angle position in the cyclical forming movement in the allocated recess (16).

Description

METHOD AND DEVICE TO PRODUCE A WAVE WINDOW FOR STATORS OR ROTORS OF MACHINES ELECTRICAL The invention relates to a method and a device for producing a corrugated winding for stators or rotors of electrical machines, wherein at least one winding wire, which is fed by a wire guide, is wound up in a training body designed with depressions of a template, which can be rotationally driven, is pressed cyclically on the respectively assigned expressions during the creation of each winding of the corrugated winding by means of external, arcuate forming elements that move radially guided from the as a function of assumption of the angle of rotation, and subsequently the windings are transferred into longitudinal grooves of a spiral receiver, which can be placed coaxially in front of the forming body and is held, fixed against relative rotation, or performs a movement of placement during the creation of the windings, which are rolled without discontinuities in l wire.

DE 43 06 624 C2 describes a device by means of which the aforementioned method can be executed. The process is such that a first wavy winding occurs in a template, is cut off from the wire supply and is pulled over the spiral receiver, then an additional wavy winding is produced in the same manner, cut and removed over the wire. spiral receiver after the latter has made a rotary graduation movement, etc. In this case, the spiral receiver only needs to return positioning movements, preferably only rotary gradation movements, but in individual cases possibly also translation movements. It does not need to be driven synchronously with the template, as is the case in connection with winding methods in which an additional winding occurs without a discontinuity in the wire on a rotating template that follows the winding and removal of simple windings or corrugated, such as, for example, in accordance with EP 0 574 841 A1, WO 98/25444 and the purpose in the German patent application number 197 39 353.5. It is practical to operate with spiral receivers without a synchronous drive mechanism, for example if, to achieve short production times and use an individual traction device, the wave windings to be switched in series, are produced in a parallel operation in different templates, then they are transferred to the same spiral receiver and subsequently tucked into the rotor stator, such as according to EP 0 818 874 Al, for example, where, however, the winding wire is not continuously formed in a waveform during the winding process, but all the coils are pulled together in a corrugated winding only after completion of the winding process. The method according to DE 43 96 624 C2, which is practiced with a graduation spiral receiver which can not however be driven synchronously with the template, has hitherto had the disadvantage that, in order to produce a corrugated winding with a desired number of windings, it is necessary depending on the size and cross-section, after an appropriate number of rotations, to rotate the template even further in variable quantities beyond the initial -Je-position, because the end of the last winding is only formed in the form terminated by the cyclically moving training element, which acts in the last circumferential area after it has passed through the base or initial position, respectively. The object of the invention aimed at avoiding this drawback is achieved with respect to the method since the formation of the end of the last winding of the corrugated winding is terminated by at least one forming element near the wire guide in the assigned depression, wherein the last training element moves radially inward in addition to the training movement cyclically performed. The additional inward movement takes place in a different position of the angle of rotation of the template than with the cyclically formed training movement. The device for executing this method is characterized in claim 6. It is achieved by means of the invention that the control of the winding devices, wherein the undulated windings produced in a revolvingly driven jig, are cut off from the wire supply afterwards. of the winding process respectively before or after being extracted on a spiral receiver, is simplified, and the winding and re-machining times can be shortened. This is of particular importance in conjunction with the winding devices with several rotary-driven templates, which operate in parallel, where preference is given to a short cycle time of an attaching device connected downstream of the winding device, by means of which the corrugated windings collected in the spiral receiver are forced into the slots of a stator or rotor, with respect to the continuous wire connections between the windings * corrugated produced successively. An exemplary embodiment of the invention will be explained in greater detail below by means of the drawings. What is shown is: Figure 1, is a simplified view of the above in a winding device to produce a corrugated winding, Figure 2 is a vertical cross-section through the device according to Figure 1. Since the design The basic description of the device shown in FIGS. 1 and 2 is known from DE 43 06 624 C2, the following description can be delimited to the essential details. The top view of Figure 1 shows a winding template with an inner forming body 10 and exterior forming elements 12. In the case of the example, the forming body 12 is composed of six winding jaws 14, which are distributed uniformly over the circumference. The spaces between the jaws 14 form depressions 16 in the forming body 10, into which the forming elements 12, which come radially from the outside, can be introduced. Corresponding to the number of six jaws 14 in the example, six outer training elements 12 are also provided. To produce a corrugated winding in the forming body 10, the jig 10, 12 is rotated about the longitudinal, central, vertical axis in the center of the arrangement d of the winding jaws 14, while a winding wire, or so Several parallel, parallel winding wires 18 are fed through a wire guide 20 in the form of a wire nozzle, for example, arranged laterally next to the forming body 10. The wire 18 is held in place in one of the winding jaws 14 at the beginning of the winding process and subsequently taken together by the rotary forming body 10 and pulled through the wire nozzle 20 from a wire supply. The wavy shape of the winding is produced since, during each revolution of the forming body 10, the outer forming elements 12 which rotate together with it introduce sequentially and cyclically the depression 16 that may pass the wire guide 20, and in the process pulls the wire section required to form the wave of the wire guide 20 in addition to the wire section pulled by the rotation of the forming body 10. In the exemplary embodiment, the drive to move the outer training elements 12 is derived from the rotary movement of the jig 10, 12. A curved, stationary track 22 is provided for this purpose, whose centerline is multiplied by 24. The track curve 22 extends in the shape of a semicircle about half the circumference of the forming body 10, semicircle that is diametrically opposite to the wire guide 20 with respect to the axis of rotation. On its side, the curved track 22 forms an arc that moves further away from the axis of rotation, which with the comparatively small radii makes a transition on both sides in approximately straight connection sections, which follows the semicircular section in an essentially tangential manner. By means of the previously described form of the curved track 22, which is closed in itself and shown in Figure 1, into which the rollers 26 connected with the forming elements 12 enter, it is achieved that the forming elements 12 The outer ones are pulled radially back outwards when they reach the wire guide 20 during each rotation of the jig and, as soon as they have passed the wire guide 20, they move in a radially fast way back towards the respectively assigned depression 16 and they remain in their terminal, radial position until they again reach the wire guide 20 during the rotation of the template. In this way, the outer forming elements 12 perform a radial, cyclic movement that moves inwards and outwards, during each rotation of the jig, with a retention phase in the terminal, radially inner position extending approximately over the half of the circumference. It is assumed that the template is represented in the terminal position by following the winding of a corrugated winding with a defined number of parallel wire windings, where the beginning of the spiral is identified by 27. The terminal position in which the template is stopped it coincides with the initial position that it assumed at the beginning of the winding process. In this way, the template has made exactly as many rotations in the course of the winding process as it is proposed that the number of windings has the undulated winding. As can be determined by the position of the wire 18 of the winding between the wire guide 20 and the forming body 10, the jig has rotated in a clockwise direction according to Figure 1 during the winding process . It can also be seen from Figure 1, that the last winding of the winding wire 18 could not be formed in a waveform, instead it extends from the jaw 14, which is already approximately 60 ° behind the rail guide. wire 20, and tangentially in a straight line through the depression 16, which has also already passed the wire guide 20, or the latter. In order to also form this end of the last winding of the corrugated winding in a wave, or corrugation as the template 10, 12 will have and will again be about 60 °, starting from the position to Figure 1. In this rotation path, the formation element 12, pulled radially outwards will have to enter the depression 16, which in Figure 1 is joined by the section 18 of straight wire, and in the process will have to form the wire, but one sixth of the wire length of A corrugated winding will have to be pulled further from the wire guide 20. If the additional rotary movement about 60 ° is not performed, the last winding of the corrugated winding will remain incomplete. It is understood that the radial entry of the forming element 12 forming the terminal section of the last corrugated winding into a corrugated shape does not need to take place absolutely during the stop at the initial position of the jig. The terminal position may differ from the initial position within a tolerable angle range of for example, up to 30 °, or a drive mechanism, which may be effective during the rotary movement of the jig, may be selected for radial movement, of the forming element 12. In order to avoid an additional rotary movement beyond the initial position at the end of each winding process, and in this way achieving a simplification of the control process, it is provided in conjunction with the represented winding position that at least one of the two forming elements 12 which, in the initial position shown, have been pulled radially outwards by the curve track 22, can be pushed towards its terminal, lower, radial position by an additional drive mechanism 28 along a radially extending branch 30 of the curved, circular track 22. In the course of this, section 18 wire, straight, not yet deformed is pushed into the depression 16 of the forming body 10, which have it attached. Of the two forming elements 12 which have been pulled radially outward in the initial position, respectively only the one which has already passed the wire guide 20 during the pre-winding process needs to be pushed inward along the radial branch 30. of the curved track 22. During a rotation in the counterclockwise direction this will be the forming element 12 shown to the left of the wire guide 22 according to Figure 1. However, in a manner preferably both forming elements 12, which have been pulled back radially outwards, are simultaneously pushed radially inwardly, so that the corrugated winding produced rests in a dependent manner in the depressions 16 against the forming body 10 on the circumference complete, and can also be extracted in a manner dependent on the template 10, 12 axially out of this position by means of extractors 32 and it has been ransferred in the axial grooves of a receiver 34. The wire 19 is cut in the wire guide 20 by means of a cutting device, not shown, before or after it is removed. Immediately after the extraction process, the fresh start of a wire can be pushed out of the wire guide 20 towards the jaw 14, which, in the initial position shown, is located directly in front of this and on which sits a wire clamp, and can be fastened, so that the next winding process can start immediately after. In this case, the control of the drive mechanism of the template can be simply incorporated, because it always stops in the initial position, so that it only needs to be adjusted the direction of rotation and the number of windings. Since the principle of the invention has already been explained by means of Figure 1, reference is made to Figure 2 to describe the structural details of the preferred embodiment. Only one jaw 14 of the forming body 10 and located in opposite form, only one outer forming element 12, are represented. The latter is held in a support element 36, which is connected to a guide roller 38 and is attached, movably in the vertical direction, to a carriage 40. The latter slides on radially extending guide rails 42, which they sit radially in the interior in a support bearing 44. The respective guide roller 26 is attached to the carriage 40.

When the template 10, 20 is in the initial position represented in Figure 1, each of the elements of the formation 12 has a defined position, complete with the angle of rotation. This also applies to the two forming elements 12, which have been pulled back radially outwards. In this way, in its initial position it is possible respectively to arrange an additional drive mechanism, for example in the form of a pneumatically actuated cylinder with a piston rod 28, radially out of the respective carriage 40. After the template 10, 12 has stopped in its initial position following the winding process, the respective piston rod 28 moves radially forward towards the interior and fits with its front end in a suitable coupling in the carriage 40, which is then carried with it towards its radially inner terminal position, in which the forming element 112 supported by the respective carriage 40 is moved completely in the assigned depression 16. Before the next winding process after this starts, the piston rod 18 is pulled again back radially outwardly by its pneumatic cylinder and in the process it takes the car 40, which is connected to it by means of a releasable snap connection, with this along the radial branch 30 of the curved track 22. Once the carriage 40 has reached its outer terminal position, the snap connection is released by means of a continuous pull of the rod 28 of piston, so that the carriage 40 is completely released from the piston rod 28 and can be rotatably guided along the ring-shaped curved track 22 during the subsequent winding process, while the two mechanisms Additional carriage drives acting radially remain in their respective position on the circumference of the curved track 22. Since in the course of the winding process, the forming elements 12 rotate mainly at the level of the winding wire 18 food by the wire guide 20, during each revolution are not only pulled radially back along the curved track 22 until they are outside the envelope circle of the forming body 10, if n or they are also raised in front of the wire guide 20 and lowered again when they pass in order to coincide with this, average of an additional curved track 46, which works in conjunction with guide rollers 38. After a corrugated winding has been produced in the forming body 10 with the aid of the outer forming elements 12, the forming body 10, together with the wire guide 20, is lowered sufficiently so that the forming body 10 and the receiver 34 are in axial engagement. Subsequently, the extractor 32 is actuated, which pushes the corrugated winding out of the forming body 10 in the grooves of the receiver 34. Subsequently the forming body 10, the wire guide 20 and the extractor 32 moves move upwards again, so that the forming body 10 is released from the receiver 34 and can initiate the next rotary movement, while the receiver 34 remains stationary or only performs a positioning movement, for example, makes a gradation movement by means of a motor 48. During the winding process, the receiver 34, together with the corrugated winding transferred to it, can be transported in an attack station, for example, it can be replaced by another empty receiver 34. In the mode described by way of example, the receiver 34 need not have any rotary drive mechanism except for the graduation motor 48, ie, it does not need to be driven synchronously with the template 10, 12 by its own motor drive mechanism, or coupled with this to be carried with it. Because the template is separated from the receiver 34 during the winding process, and since the wire is also cut after each winding process, the receiver 34 can perform any arbitrary positioning movement during the winding, that is, it can be graduated or transported. The receiver 34 is preferably a lunge tool, having parallel laminations arranged in a ring shape, between which one or more corrugated windings are suspended in the position below the jig 10, 12. Subsequently, a stator is placed, for example, the laminations in a known manner in the tapping station, and then the corrugated windings are axially struck in their grooves. In order to obtain the individual layer of windings in the forming body 10 without overlapping the windings, the template performs usefully in an axial movement relative to the wire guide 20, wherein the lining of the parallel wires of the winding, the axial advance per revolution corresponds approximately to the sum of the diameters of the parallel wires. The training body 19 must be taught to have the appropriate length.

Claims (8)

1. From d. CLAIMS 1. A method for producing a corrugated winding for stators or rotors of electrical machines, wherein at least one winding wire, which is fed by a wire guide, is wound into a forming body designed with depressions of a template, which can be rotationally driven, and pressed cyclically in the depressions respectively assigned during the creation of each winding of the corrugated winding by means of external forming elements, sides of a radially mobile form of the template as a function of its position of the angle of rotation, then the windings are transferred into longitudinal grooves of a spiral receiver, which can be placed axially in front of the forming body and held, fixed against relative rotation, or performs a positioning movement during The creation of the windings is rolled up without interruption in the wire, characterized in that the formation of The end of the last winding of the corrugated winding is terminated by at least one forming element near the wire guide in the assigned depression, wherein the last forming element moves radially inward in addition to the cyclically formed forming movement. The method according to claim 1, characterized in that at the end of a winding process, the template stops at the same position of the angle of rotation assumed at the beginning of the winding process, and then the end of the last winding of the undulated winding produced is pushed into the depression assigned by a forming element that moves radially inward and is formed. The method according to claim 2, characterized in that after stopping the rotation movement of the template, the corrugation winding is also pushed into the depression assigned by the radial inward movement of the forming element which, during the movement of training, has moved the training element that forms the winding element. The method according to one of claims 1 to 3, characterized in that one or more wires, being parallel to one another in a layer, are wound into the forming body in the manner of a screw spring, since the body of formation performs an axial advancing movement during the rotary movement and at the end of the winding process are located between the forming body and the wire guide in a plane extending parallel in relation to the axis of rotation of the forming body. A device for executing the method according to one of claims 1 to 4, which has a template, which can be rotationally driven, located in front of a wire guide comprising a forming body, which is designed for corresponds to the inner diameter of the corrugated winding to be produced and is equipped with depressions, and the radially moving outer formation elements, each of which can be moved sequentially and cyclically towards and away from the respective depressions assigned therein. each revolution of the template depending on its positions of angle of rotation, and having a spiral receiver, which is proviwith axial grooves and can be placed axially of the forming body and during the respective rotary movement of the template, is keeps fixed against relative rotation or performs a positioning movement, characterized in that at the end of the revolution of the stencil, made to produce the last winding of a corrugated winding, subsequent to the movement of insertion and cyclic removal, at least one forming movement, which is near the wire guide, can be moved towards the radially inner terminal position in the depression assigned from the training body. The device according to claim 5, characterized in that the cyclic radial movement of the forming elements is derived from the rotary movement of the insole by a curved track in the form of a ring, stationary, and that at the end of the rotating movement of the insole , the forming element, which forms the end of the last winding of the corrugated winding, can be moved radially inwardly along a branch of the curved track by means of an additional driving mechanism. 7. The device according to the claim 6, characterized in that at the end of a winding process, the template can be held in the same position as the angle of rotation assumed at the beginning of the winding process, and the training element, which has directly followed the training element which has formed the end of the corrugated winding during the winding process, can be moved inwardly along a branch of the curved track by means of an additional drive mechanism at the end of the rotary movement of the template. The device according to one of claims 5 to 7, characterized in that the wire guide is designed with individual guides for several parallel wires that can be rolled simultaneously into individual layers in the forming body, while during each revolution this The latter performs an axial advance in relation to the wire guide corresponding to the sum of the wire diameters.