Method for applying a fiber bundle to a component, application device, computer program and computer-readable medium

Abstract

Shown and described is a method for applying a fiber bundle (5) to a component (3), the method comprising the following steps: mounting the component (3) such that it is mounted rotatably about an axis of rotation (21), attaching a first end section of the fiber bundle (5) to the component (3) mounted rotatably about the axis of rotation (21), causing the component (3) to rotate about the axis of rotation (21) so that fiber bundle sections of the fiber bundle (5) are applied to the component (3) one after the other in the circumferential direction (23) about the axis of rotation (21), guiding the fiber bundle (5) along the axis of rotation (21) such that the fiber bundle sections are arranged offset from one another along the axis of rotation (21), and applying a force (27) acting perpendicular to the axis of rotation (21) and in the direction of the axis of rotation (21) to the fiber bundle sections applied to the component (3) during a first time interval using a Force application device (17).In addition, an application device (1), a computer program and a computer-readable medium are shown and described.

Description

[0001] The present invention relates to a method for applying a fiber bundle to a component, an application device, a computer program and a computer-readable medium.

[0002] Methods for applying a fiber bundle to a component are known from the prior art. For example, the filament winding method is known from the prior art. In the methods known from the prior art, the component is first mounted so as to be rotatable about an axis of rotation, and a first end section of the fiber bundle is attached to the component which is mounted so as to be rotatable about the axis of rotation. The component is caused to rotate about the axis of rotation such that fiber bundle sections of the fiber bundle are applied to the component one after the other in the circumferential direction around the axis of rotation. In addition, the fiber bundle is guided along the axis of rotation such that the fiber bundle sections are arranged offset from one another along the axis of rotation.

[0003] In general, it is desirable that an optimal shape of the fiber bundle sections is achieved when applied to the component, particularly when there are high mechanical stresses in the fiber bundle and despite different mechanical loads on the fiber bundle sections when applied to the component.

[0004] It is therefore the object of the present invention that, in particular in the case of high mechanical stresses present in the fiber bundle and despite different mechanical loading of the fiber bundle sections when applied to the component, an optimal shape of the fiber bundle sections is achieved in the state applied to the component.

[0005] According to a first aspect of the invention, the stated object is achieved by a method having the features of patent claim 1. The method is provided for applying a fiber bundle to a component. The method comprises the following steps: Mounting the component such that it is mounted so as to be rotatable about an axis of rotation. Attaching a first end section of the fiber bundle to the component mounted so as to be rotatable about the axis of rotation. Bringing the component into a rotary movement about the axis of rotation such that fiber bundle sections of the fiber bundle are applied to the component one after the other in the circumferential direction around the axis of rotation. Guiding the fiber bundle along the axis of rotation such that the fiber bundle sections are arranged offset from one another along the axis of rotation.Applying a force acting perpendicular to the axis of rotation and in the direction of the axis of rotation to the fiber bundle sections applied to the component during a first time interval using a force application device.

[0006] The fiber bundle preferably extends from the first end section to a second end section. The fiber bundle preferably has a fiber strand pre-impregnated with resin. The fiber bundle preferably has carbon fibers and can also be referred to as roving. The component is preferably a rotor of an electric motor. Preferably, the fiber bundle is pre-impregnated with resin before it is applied to the component, or the fiber bundle already applied to the component is impregnated with resin. Preferably, the resin is then cured so that a rotor bandage for the rotor of the electric motor is produced from the resin-coated fiber bundle. The rotor bandage can then absorb the centrifugal forces generated during operation of the electric motor, so that the usable range of application can be further increased.Depending on the design and manufacturing process, the bandage can be applied to the rotor in such a way that there is no radial expansion of the rotor, or at least only a very slight and therefore acceptable radial expansion, across the entire operating speed range. This allows the air gap in the electrical machine (electric motor) to be reduced, since radial expansion of the rotor does not need to be taken into account.

[0007] As already described, the fiber bundle is guided along the axis of rotation in such a way that the fiber bundle sections are arranged offset from one another along the axis of rotation. A fiber bundle section is preferably a section of the fiber bundle which, when applied to the component, extends once from a first end section around the axis of rotation to a second end section, wherein the first end section of the corresponding fiber bundle section and a second end section of a fiber bundle section applied to the component before the corresponding fiber bundle section merge into one another, and the second end section and a first end section of a fiber bundle section applied to the component after the corresponding fiber bundle section merge into one another. The two transition regions are preferably intersected by the same straight line, wherein the straight line extends parallel to the axis of rotation.Preferably, two fiber bundle sections applied consecutively to the component are in contact with one another in the direction of the fiber bundle's guide along the rotation axis. This is achieved, in particular, by optimally adjusting the force applied to the fiber bundle sections applied to the component. If two fiber bundle sections applied consecutively to the component are in contact with one another in the direction of the fiber bundle's guide along the rotation axis, this can also be described as the two fiber bundle sections being in contact with one another.

[0008] A key difference between the present invention and the prior art is that the fiber bundle sections applied to the component are subjected to a force acting perpendicular to the axis of rotation and in the direction of the axis of rotation during the first time interval using the force application device. The fact that the fiber bundle sections applied to the component are subjected to a force acting perpendicular to the axis of rotation and in the direction of the axis of rotation ensures that the fiber bundle sections applied to the component can be deformed using the force. In particular, the force can be used to deform the fiber bundle sections in planes running perpendicular to the force, in particular transversely to a direction of extension of the fiber bundle sections and in particular along the axis of rotation.In particular, when there are high mechanical stresses in the fiber bundle and in particular when the fiber bundle sections are subjected to different mechanical loads and are therefore deformed to different degrees when applied to the component, the force can be used to deform at least some of the fiber bundle sections so that, despite different mechanical loads, the fiber bundle sections are deformed to a similar extent and it can be easily achieved that the fiber bundle sections applied to the component lie against one another in the guide direction of the fiber bundle along the axis of rotation.

[0009] In summary, it can be stated that with the aid of the method, an optimal shape of the fiber bundle sections in the state applied to the component can be achieved, especially when high mechanical stresses are present in the fiber bundle and despite different mechanical loads on the fiber bundle sections when applied to the component.

[0010] Preferably, the force acting perpendicular to the axis of rotation and in the direction of the axis of rotation, with which the fiber bundle sections applied to the component are subjected, is adjusted such that the fiber bundle sections applied one after the other to the component abut one another in the guide direction of the fiber bundle along the axis of rotation, thus avoiding regions in which no fibers are arranged. In the event that the fiber bundle comprises fibers pre-impregnated with a resin, pure resin regions are avoided in these regions, which leads to particularly advantageous properties of the fiber bundle applied to the component. Since the first gradient is smaller than the second gradient with the aid of the present invention, the formation of pure resin regions can be counteracted or these regions can even be completely prevented.

[0011] In connection with the present invention, a force acting perpendicular to the axis of rotation and in the direction of the axis of rotation is frequently mentioned, which can also be referred to very generally as a force. Additionally, in connection with the present invention, a tensile force is mentioned, which is to be distinguished from the "force" and describes a tensile force with which the fiber bundle section that is next applied to the component is loaded and can also be referred to as a prestressing force.

[0012] In one embodiment, the fiber bundle sections applied to the component are subjected to a force acting perpendicular to the axis of rotation and in the direction of the axis of rotation during a second time interval using the force application device, wherein the force during the first time interval is greater than the force during the second time interval. The fact that the force during the first time interval is greater than the force during the second time interval ensures that if the fiber bundle sections are subjected to different mechanical loads and thus deform to different extents, the deformation of the fiber bundle sections can be adjusted accordingly. In particular, when high mechanical stresses are present in the fiber bundle, optimal deformation of the fiber bundle sections in the state applied to the component can be achieved by adjusting the force.

[0013] In one embodiment, the force application device is spaced apart from the fiber bundle sections applied to the component during a second time interval. If the force application device is spaced apart from the fiber bundle sections applied to the component during the second time interval, it is ensured that the fiber bundle sections applied to the component are not subjected to the force acting perpendicular to the axis of rotation and in the direction of the axis of rotation by means of the force application device during the second time interval and are therefore not further deformed. The method can therefore be adjusted to the mechanical loading of the fiber bundle sections present during the second time interval and the deformation caused thereby, thus providing a particularly simple method since the force can be dispensed with during the second time interval.

[0014] In one embodiment, the fiber bundle sections applied to the component are subjected to a force acting perpendicular to the axis of rotation and in the direction of the axis of rotation during a third time interval using the force application device, wherein the force during the third time interval is greater than the force during the second time interval. The fact that the force during the third time interval is greater than the force during the second time interval ensures that if the fiber bundle sections are subjected to different mechanical loads and thus deform to different extents, the deformation of the fiber bundle sections can be adjusted accordingly. In particular, when high mechanical stresses are present in the fiber bundle, optimal deformation of the fiber bundle sections in the state applied to the component can be achieved by adjusting the force.The first time interval can also be called the first time period, the second time interval can also be called the second time period and the third time interval can also be called the third time period.

[0015] In one embodiment, the first time interval occurs before the second time interval. The fact that the first time interval occurs before the second time interval ensures that the fiber bundle sections applied to the component are initially subjected to the force during the first time interval and the fiber bundle sections applied to the component are subsequently subjected to the force during the second time interval or, alternatively, no force is applied during the second time interval, wherein the force during the first time interval is greater than the force during the second time interval, and wherein the force during the second time interval can also be zero. The force can therefore be adjusted during the application of the fiber bundle to the component such that the fiber bundle is initially subjected to a greater force and subsequently to a lower force, or, alternatively, no force is applied subsequently.

[0016] In one embodiment, the third time interval occurs after the second time interval. The fact that the third time interval occurs after the second time interval ensures that the fiber bundle sections applied to the component are first subjected to the force during the second time interval and that the fiber bundle sections applied to the component are then subjected to the force during the third time interval, wherein the force during the third time interval is greater than the force during the second time interval, which can also be zero. Thus, the force during the application of the fiber bundle to the component can be adjusted such that the fiber bundle is initially subjected to a lower force or initially to no force and then to a greater force.

[0017] In one embodiment, the force is / are constant during the first time interval and / or the force during the second time interval and / or the force during the third time interval. Because the force is / are constant during the first time interval and / or the force during the second time interval and / or the force during the third time interval, the complexity of the control processes can be kept low or even completely eliminated. For example, a force can be specified for the first time interval, the second time interval, and / or the third time interval.

[0018] In one embodiment, the mechanical stress present in the fiber bundle section that is next applied to the component is detected, wherein the force during the first time interval and / or the force during the second time interval and / or the force during the third time interval is adjusted depending on the detected mechanical stress. By detecting the mechanical stress present in the fiber bundle section that is next applied to the component and adjusting the force during the first time interval and / or the force during the second time interval and / or the force during the third time interval depending on the detected mechanical stress, it is ensured that the force acting perpendicular to the axis of rotation and in the direction of the axis of rotation can be adjusted particularly quickly and precisely depending on the existing mechanical stress.

[0019] Preferably, the force is constant during the first time interval and the force is constant during the second time interval. Particularly preferably, the force is constant during the first time interval and the force is constant during the second time interval and the force is constant during the third time interval. The force during the first time interval is preferably selected such that the fiber bundle sections applied one after the other to the component during the first time interval abut one another in the guide direction of the fiber bundle along the axis of rotation. The force during the second time interval is preferably selected such that the fiber bundle sections applied one after the other to the component during the second time interval abut one another in the guide direction of the fiber bundle along the axis of rotation.The force during the third time interval is preferably selected such that the fiber bundle sections successively applied to the component during the third time interval abut one another in the guiding direction of the fiber bundle along the rotation axis. Furthermore, a tensile force with which the fiber bundle section that is next applied to the component is loaded during the first time interval is preferably constant. Furthermore, a tensile force with which the fiber bundle section that is next applied to the component is loaded during the second time interval is preferably constant. Furthermore, a tensile force with which the fiber bundle section that is next applied to the component is loaded during the third time interval is preferably constant.Furthermore, a tensile force with which the fiber bundle section that is next applied to the component is loaded during the first time interval and / or during the third time interval is preferably lower than a tensile force with which the fiber bundle section that is next applied to the component is loaded during the second time interval.

[0020] Preferably, the mechanical stress present in the fiber bundle section that is next applied to the component is detected during the first time interval, wherein the force during the first time interval is adjusted as a function of the detected mechanical stress, and the force is constant during the second time interval. Particularly preferably, the mechanical stress present in the fiber bundle section that is next applied to the component is detected during the first time interval and during the third time interval, wherein the force during the first time interval and the force during the third time interval is adjusted as a function of the detected mechanical stress, and the force is constant during the second time interval.The force during the first time interval is preferably selected such that the fiber bundle sections applied one after the other to the component during the first time interval abut one another in the guide direction of the fiber bundle along the axis of rotation. The force during the second time interval is preferably selected such that the fiber bundle sections applied one after the other to the component during the second time interval abut one another in the guide direction of the fiber bundle along the axis of rotation. The force during the third time interval is preferably selected such that the fiber bundle sections applied one after the other to the component during the third time interval abut one another in the guide direction of the fiber bundle along the axis of rotation. In addition, a tensile force with which the fiber bundle section that is applied to the component next is loaded during the second time interval is preferably constant.Furthermore, a tensile force with which the fiber bundle section that is next applied to the component is loaded during the first time interval and / or during the third time interval is preferably lower than a tensile force with which the fiber bundle section that is next applied to the component is loaded during the second time interval.

[0021] Preferably, the fiber bundle sections applied to the component are subjected to varying degrees of mechanical stress during application to the component, since high mechanical stresses cannot be applied during binding and unbinding, yet high mechanical stresses on the fiber bundle sections must be applied after binding and before binding in order to create a mechanically robust applied fiber bundle. Particularly under high mechanical stresses on the fiber bundle sections, for example, when a tensile force acting on a fiber bundle section is greater than 500 N, the fiber bundle sections deform more severely perpendicular to their direction of extension and parallel to a preferably cylindrical surface to which they are applied than is the case with lower mechanical stresses.The fiber bundle sections subjected to high mechanical stress are therefore wider in the axial direction and thinner in the radial direction due to the greater mechanical stress than under lower mechanical stress. By detecting the mechanical stress present in the fiber bundle section that is next applied to the component and adjusting the force during the first time interval and / or the force during the second time interval and / or the force during the third time interval depending on the detected mechanical stress, it is ensured that the force can be adjusted particularly quickly and precisely depending on the existing mechanical stress so that fiber bundle sections applied to the component one after the other abut one another.

[0022] According to a second aspect of the invention, the stated object is achieved by an application device having the features of patent claim 9. The application device is designed to apply a fiber bundle to a component. The application device has a component holding device. The component holding device is designed to mount the component so as to be rotatable about a rotation axis. The application device also has a drive device. The drive device is designed to cause the component to rotate about the rotation axis so that fiber bundle sections of the fiber bundle are applied to the component one after the other in the circumferential direction about the rotation axis. The application device also has a guide device. The guide device is designed to guide the fiber bundle along the rotation axis such that the fiber bundle sections are arranged offset from one another along the rotation axis.The application device also has a force application device. The force application device is designed to apply a force perpendicular to the axis of rotation and in the direction of the axis of rotation to the fiber bundle sections applied to the component. The features, technical effects, and / or advantages described in connection with the method according to the first aspect of the invention also apply at least analogously to the application device according to the second aspect of the invention, so that a corresponding repetition is omitted here.

[0023] According to a third aspect of the invention, the stated object is achieved by a computer program having the features of patent claim 10. The computer program comprises instructions which cause the application device according to the second aspect to carry out the method steps of the method according to the first aspect or to carry out at least some of the method steps of the method according to the first aspect. The features, technical effects and / or advantages described in connection with the method according to the first aspect of the invention and those described in connection with the application device according to the second aspect of the invention also apply at least analogously to the computer program according to the third aspect of the invention, so that a corresponding repetition is omitted here.

[0024] According to a fourth aspect of the invention, the stated object is achieved by a computer-readable medium having the features of patent claim 11. The computer-readable medium stores the computer program according to the third aspect of the invention. The features, technical effects, and / or advantages described in connection with the method according to the first aspect of the invention, those described in connection with the application device according to the second aspect of the invention, and those described in connection with the computer program according to the third aspect of the invention also apply, at least analogously, to the computer-readable medium according to the fourth aspect of the invention, so that a corresponding repetition is omitted here.

[0025] Even if the method steps are described in a specific order, the present invention is not limited to this order. Rather, the individual method steps can be performed in any meaningful order, in particular at least partially in parallel.

[0026] Further features, advantages, and possible applications of the present invention will become apparent from the following description of the exemplary embodiments and the figures. All described and / or illustrated features, individually and in any combination, constitute the subject matter of the invention, regardless of their composition in the individual claims or their references. In the figures, the same reference numerals continue to represent the same or similar objects. Fig. 1 shows a schematic representation of an embodiment of a method according to the invention, Fig. 2 shows a schematic representation of a first embodiment of an application device according to the invention, Fig. 3 shows a schematic representation of a second embodiment of an application device according to the invention, Fig. 4 shows a schematic representation of a component to which a fiber bundle has been applied, and Fig. Figure 5 shows a schematic representation of a relationship between a roving width and a pre-tension force.

[0027] Fig. 1 shows a schematic representation of an embodiment of a method according to the invention, Fig. 2 shows a schematic representation of a first embodiment of an application device 1 according to the invention, Fig. 3 shows a schematic representation of a second embodiment of an application device 1 according to the invention, Fig. 4 shows a schematic representation of a component 3 onto which a fiber bundle 5, which is Fig. 2 dashed and in Fig. 3 is shown with a solid line, and Fig. 5 shows a schematic representation of a relationship between a roving width 7 and a pre-tension force 9.

[0028] The Fig. 2 illustrated first embodiment of the application device 1 according to the invention and the Fig. The second embodiment of the application device 1 according to the invention, shown in Figure 3, is configured for applying the fiber bundle 5 to the component 3, which in the example shown is a rotor of an electric motor. The application device 1 has a component holding device 11, a drive device 13, a guide device 15, a force application device 17, and a control device 19. The component holding device 11, the drive device 13, the guide device 15, the force application device 17, and the control device 19 are fastened to a frame (not shown) of the application device 1. The component holding device 11 is designed to mount the component 3 so as to be rotatable about a rotation axis 21. The component 3 can therefore be fastened to the component holding device 11 in order to apply the fiber bundle 5 to the component 3.When the component 3 is attached to the component holding device 11, it is mounted so that it can rotate about the axis of rotation 21.

[0029] The drive device 13 is designed to cause the component 3 to rotate about the rotation axis 21, so that fiber bundle sections of the fiber bundle 5 are applied one after the other in the circumferential direction 23 about the rotation axis 21 onto the component 3. Fig. 2 illustrated first embodiment of the application device 1 according to the invention and in the Fig. In the second embodiment of the application device 1 according to the invention shown in Figure 3, a circumferential direction 23 and a rotational direction 25 are shown. The component 3 performs a rotational movement about the rotational axis 21 in the rotational direction 25, so that the fiber bundle sections of the fiber bundle 5 are applied to the component 3 one after the other in the circumferential direction 23 about the rotational axis 21. The circumferential direction 23 and the rotational direction 25 lie in a plane arranged perpendicular to the rotational axis 21. Furthermore, the circumferential direction 23 and the rotational direction 25 point in opposite directions with respect to a circular path section arranged coaxially to the rotational axis 21 and lying in the plane.

[0030] The guide device 15 is designed to guide the fiber bundle 5 along the axis of rotation 21 such that the fiber bundle sections are arranged offset from one another along the axis of rotation 21. The guide device 15 can be moved along the axis of rotation 21 and, with the aid of a movement along the axis of rotation 21, guide the fiber bundle 5 along the axis of rotation 21 such that the fiber bundle sections are arranged offset from one another along the axis of rotation 21. When “along the axis of rotation” is used in connection with the present invention, this means in particular that an arrangement is provided or a movement takes place such that a straight line runs parallel to the axis of rotation 21 and the arrangement is intersected by this straight line or the movement path of the movement is at least partially intersected by the straight line. The guide device 15 has a thread eyelet through which the fiber bundle 5 is guided.With the help of the thread eye, the fiber bundle 5 is guided along the axis of rotation 21 such that the fiber bundle sections are arranged offset from one another along the axis of rotation 21. The fiber bundle sections that are arranged offset from one another along the axis of rotation 21 together preferably do not form the entire fiber bundle 5. The fiber bundle 5 preferably has a first end section and a second end section, wherein the fiber bundle 5 extends from the first end section along the fiber bundle sections to the second end section. A fiber bundle section adjacent to the first end section is preferably wound onto the first end section in the radial direction without the first end section and the fiber bundle section adjacent to the first end section being arranged offset from one another along the axis of rotation 21 in order to fasten the fiber bundle 5 to the component 3.

[0031] A key difference between both the Fig. 2 illustrated first embodiment of the application device 1 according to the invention as well as the one in Fig. 3, and application devices known from the prior art, is that the force application device 17 is designed to apply a force 27 acting perpendicularly to the rotational axis 21 and in the direction of the rotational axis 21 to the fiber bundle sections applied to the component 3. The force 27 acting perpendicularly to the rotational axis 21 and in the direction of the rotational axis 21 is shown in the Fig. 2 and Fig. 3 are each symbolized by an arrow. Fig. 2 illustrated first embodiment of the application device 1 according to the invention and the Fig. The second embodiment of the application device 1 according to the invention shown in Figure 3 has a pressure roller which can be moved towards the axis of rotation 21 in order to apply the force 27 acting perpendicularly to the axis of rotation 21 and in the direction of the axis of rotation 21 to the fiber bundle sections applied to the component 3 and can be moved away from the axis of rotation 21 in order to release the component 3 again after the fiber bundle 5 has been applied to the component 3 and in order not to be in contact with the fiber bundle sections applied to the component 3 for certain time intervals during the application of the fiber bundle 5 to the component 3.When the pressure roller is in contact with the fiber bundle sections applied to the component 3, the pressure roller rotates in the opposite direction to the direction of rotation 25, so that the pressure roller rolls on the fiber bundle sections applied to the component 3, so that a mechanically particularly gentle application of the force 27 to the fiber bundle sections applied to the component 3 is ensured.

[0032] The control device 19 is designed to transmit control signals to the drive device 13, the guide device 15 and the force application device 17. A wired transmission or a radio transmission is possible in Fig. 2 symbolized by long dashes. Each control signal of the control signals represents a control command, such as a rotational speed for the rotational movement of component 3 about the rotational axis 21, a travel speed of the guide device 15 along the rotational axis 21, or a force 27 acting perpendicular to the rotational axis 21 and in the direction of the rotational axis 21, with which the fiber bundle sections applied to component 3 are subjected. Using the control signals, a force 27 acting perpendicular to the rotational axis 21 and in the direction of the rotational axis 21, with which the fiber bundle sections applied to component 3 are subjected, can be set.

[0033] According to the invention, two fiber bundle sections applied one after the other to the component 3 preferably abut one another in the guide direction of the fiber bundle 5 along the axis of rotation 21. This is achieved in particular by an optimal adjustment of the force 27 acting during the first time interval and / or the force 27 acting during the second time interval and / or the force 27 acting during the third time interval. If two fiber bundle sections applied one after the other to the component 3 abut one another in the guide direction of the fiber bundle 5 along the axis of rotation 21, this can also be referred to as the two fiber bundle sections being butt-to-butt. According to the invention, it is preferred that several fiber bundle sections abut one another as viewed along the axis of rotation 21.Furthermore, it is preferred according to the invention that the fiber bundle 5 is applied to the component 3 in such a way that the fiber bundle 5 forms a plurality of layers, such that a first section of the fiber bundle 5 forms a first layer arranged directly on the component 3, and a second section of the fiber bundle 5 forms a second layer arranged directly on the first layer and radially outward relative to the first layer, perpendicular to the rotation axis 21. Preferably, further sections of the fiber bundle 5 form further layers, which are each arranged one on top of the other and radially outward relative to one another, perpendicular to the rotation axis 21.

[0034] As already described, Fig. 1 shows a schematic representation of the embodiment of the method according to the invention. The method is intended for applying the fiber bundle 5 to the component 3.

[0035] In a first method step 101 of the method, the component 3 is mounted such that the component 3 is mounted rotatably about the axis of rotation 21.

[0036] In a second method step 102 of the method, a first end section of the fiber bundle 5 arranged at a first end of the fiber bundle 5 is attached to the component 3 which is mounted rotatably about the rotation axis 21.

[0037] In a third method step 103 of the method, the component 3 is rotated about the rotation axis 21, so that fiber bundle sections of the fiber bundle 5 are applied to the component 3 one after the other in the circumferential direction 23 about the rotation axis 21. Furthermore, in the third method step 103, the fiber bundle 5 is guided along the rotation axis 21 such that the fiber bundle sections are arranged offset from one another along the rotation axis 21.

[0038] Furthermore, in the third method step 103, the fiber bundle sections applied to the component 3 are subjected to a force 27 acting perpendicular to the axis of rotation 21 and in the direction of the axis of rotation 21 during a first time interval of the third method step 103 using the force application device 17. The fact that the fiber bundle sections applied to the component 3 are subjected to the force 27 acting perpendicular to the axis of rotation 21 and in the direction of the axis of rotation 21 in the third method step 103 ensures that the fiber bundle sections applied to the component 3 can be deformed using the force 27. In particular, the force 27 can be used to deform the fiber bundle sections in planes running perpendicular to the force 27, in particular transversely to a direction of extension of the fiber bundle sections and in particular along the axis of rotation 21.In particular, in the event that the fiber bundle sections are subjected to different mechanical loads and are therefore deformed to different degrees when applied to the component 3, a deformation of at least some fiber bundle sections can be achieved with the aid of the force 27, so that despite different mechanical loads the fiber bundle sections are deformed to a similar extent and it can be easily achieved that the fiber bundle sections applied to the component 3 abut one another in the guide direction of the fiber bundle along the rotation axis 21.

[0039] Furthermore, in the third method step 103, the fiber bundle sections applied to the component 3 are subjected to a force 27 acting perpendicular to the rotational axis 21 and in the direction of the rotational axis 21 during a second time interval using the force application device 17, wherein the force 27 is greater during the first time interval than the force 27 during the second time interval. The fact that the force 27 is greater during the first time interval than the force 27 during the second time interval ensures that, if the fiber bundle sections are subjected to different mechanical loads and thus deform to different degrees, the deformation of the fiber bundle sections can be adjusted accordingly.Particularly when high mechanical stresses are present in the fiber bundle 5, optimal deformation of the fiber bundle sections in the state applied to the component 3 can be achieved by adjusting the force 27. The first time interval lies before the second time interval. The fact that the first time interval lies before the second time interval ensures that the fiber bundle sections applied to the component 3 are first subjected to the force 27 during the first time interval and that the fiber bundle sections applied to the component 3 are subsequently subjected to the force 27 during the second time interval, wherein the force 27 during the first time interval is greater than the force 27 during the second time interval.Thus, the force 27 can be adjusted during the application of the fiber bundle 5 to the component 3 such that the fiber bundle 5 is initially subjected to a greater force 27 and subsequently to a lower force 27.

[0040] As an alternative to the fiber bundle sections applied to the component 3 being subjected to the force 27 acting perpendicular to the rotational axis 21 and in the direction of the rotational axis 21 by means of the force application device 17 during the second time interval, the force application device 17 can be spaced from the fiber bundle sections applied to the component 3 during the second time interval. If the force application device 17 is spaced from the fiber bundle sections applied to the component 3 during the second time interval, it is ensured that the fiber bundle sections applied to the component 3 are not subjected to the force 27 acting perpendicular to the rotational axis 21 and in the direction of the rotational axis 21 by means of the force application device 17 during the second time interval and are therefore not further deformed.The method can therefore be adjusted to the mechanical loading of the fiber bundle sections present during the second time interval and the deformation caused thereby, so that a particularly simple method is provided since the force 27 can be dispensed with during the second time interval.

[0041] Furthermore, in the third method step 103, the fiber bundle sections applied to the component 3 are subjected to a force 27 acting perpendicular to the rotational axis 21 and in the direction of the rotational axis 21 during a third time interval using the force application device 17, wherein the force 27 during the third time interval is greater than the force 27 during the second time interval. The fact that the force 27 during the third time interval is greater than the force 27 during the second time interval ensures that, if the fiber bundle sections are subjected to different mechanical loads and thus deform to different degrees, the deformation of the fiber bundle sections can be adjusted accordingly.Particularly when high mechanical stresses are present in the fiber bundle 5, optimal deformation of the fiber bundle sections in the state applied to the component 3 can be achieved by adjusting the force 27. The third time interval occurs after the second time interval. The fact that the third time interval occurs after the second time interval ensures that the fiber bundle sections applied to the component 3 are first subjected to the force 27 during the second time interval and that the fiber bundle sections applied to the component 3 are subsequently subjected to the force 27 during the third time interval, wherein the force 27 during the third time interval is greater than the force 27 during the second time interval.Thus, the force 27 can be adjusted during the application of the fiber bundle 5 to the component 3 such that the fiber bundle 5 is initially subjected to a lower force 27 and subsequently to a greater force 27.

[0042] It is preferably provided that the rotational speed of the rotational movement of the component 3 about the axis of rotation 21 during the first time interval corresponds to the rotational speed of the rotational movement of the component 3 about the axis of rotation 21 during the second time interval and to the rotational movement of the component 3 about the axis of rotation 21 during the third time interval. Furthermore, it is preferably provided that the speed at which the fiber bundle 5 is guided along the axis of rotation 21 during the first time interval corresponds to the speed at which the fiber bundle 5 is guided along the axis of rotation 21 during the second time interval and also corresponds to the speed at which the fiber bundle 5 is guided along the axis of rotation 21 during the third time interval.By means of the rotational speed being constant during the first time interval, the second time interval and the third time interval and the speed at which the fiber bundle 5 is guided along the rotational axis 21 during the first time interval, the second time interval and the third time interval, the complexity of the control processes can be kept low or even control processes for setting the rotational speed and / or the speed at which the fiber bundle 5 is guided along the rotational axis 21 can be completely dispensed with.

[0043] Preferably, the force 27 is / are constant during the first time interval and / or the force 27 during the second time interval and / or the force 27 during the third time interval. Because the force 27 is / are constant during the first time interval and / or the force 27 during the second time interval and / or the force 27 during the third time interval, the complexity of the control processes can be kept low or even completely dispensed with. For example, a force 27 can be specified for the first time interval, for the second time interval and / or for the third time interval.

[0044] Preferably, the mechanical stress present in the fiber bundle section 7 that is next applied to the component 3 is detected, wherein the force 27 during the first time interval and / or the force 27 during the second time interval and / or the force 27 during the third time interval is adjusted as a function of the detected mechanical stress. By detecting the mechanical stress present in the fiber bundle section that is next applied to the component 3 and adjusting the force 27 during the first time interval and / or the force 27 during the second time interval and / or the force 27 during the third time interval as a function of the detected mechanical stress, it is ensured that the force 27 acting perpendicular to the rotation axis 21 and in the direction of the rotation axis 21 can be adjusted particularly quickly and precisely as a function of the existing mechanical stress.

[0045] The Fig. 2 illustrated first embodiment of the application device 1 according to the invention and the Fig. The second embodiment of the application device 1 according to the invention, shown in Figure 3, each has a fiber tensioning device 29. With the aid of the fiber tensioning device 29, a mechanical tension present in the fiber bundle 5 can be set and determined. The fiber tensioning device 29 has three deflection rollers. The fiber tensioning device 29 is designed such that when the sections of the fiber bundle 5 are deflected around at least one of the deflection rollers, the sections are at least partially and at least partially non-positively or frictionally connected at least temporarily to the deflection roller, so that by the rotational movement of the component 3 about the axis of rotation 21 and by the fact that the end section of the fiber bundle 5 is fastened to the component 3, a mechanical tension in the extension direction of the fiber bundle 5 is set between the fiber tensioning device 29 and the component 3.In this way, the mechanical tension present in the fiber bundle section that is next applied to the component 3 can be adjusted. The fiber tensioning device 29 therefore has a thread brake or can provide the function of a thread brake. The fiber tensioning device 29 also has a force detection device that detects a force acting on at least one of the three deflection rollers, which force can also be referred to as a pretension force 9 or tensile force, and from which a mechanical tension present in the fiber bundle 5 in the region of the fiber tensioning device 29 can then be determined. In this way, the fiber tensioning device 29 can be used to detect the mechanical tension present in the fiber bundle section that is next applied to the component 3.The fiber tension device 29 transmits a signal representing the detected mechanical tension present in the fiber bundle section that is next applied to the component 3 to the control device 19. A wired transmission or a radio transmission is in . Fig. 2 symbolized by long dashes. The control device 19 then determines the force 27 during the first time interval and / or the force 27 during the second time interval and / or the force 27 during the third time interval as a function of the detected mechanical stress. The control device 19 then transmits control signals to the force application device 17, which represent the force 27 determined for the first time interval and / or for the second time interval and / or for the third time interval. Thus, the force 27 can be adjusted particularly quickly and precisely as a function of the existing mechanical stress.

[0046] The fiber bundle 5 is provided wound on a spool 31. The spool 31 is rotatably attached to a spool stand so that sections of the fiber bundle 5 can be gradually provided by a rotary movement of the spool 31. The first end section of the fiber bundle 5 is fastened to the component 3 such that a section of the fiber bundle 5 adjoining the first end section extends along a guide direction 33 through the application device 1 so that the fiber bundle 5 can be conveyed along the guide direction 33 by the application device 1. The component 3 is rotatably mounted as already described, and a rotary movement of the component 3 results in sections of the fiber bundle 5 being gradually applied to the component 3. The fiber bundle 5 preferably comprises carbon fibers and can also be referred to as roving.In connection with the present invention, a distinction must be made between the guiding direction of the fiber bundle along the rotation axis 21 and the guiding direction 33 through the application device 1.

[0047] In Fig. 3 is the Fig. 2, the drive device 13, the guide device 15 and the control device 19 are not shown, wherein the Fig. 3 also comprises the component holding device 11, the drive device 13, the guide device 15 and the control device 19 and corresponding embodiments in connection with Fig. 2 also for those in Fig. The second embodiment of the application device 1 according to the invention shown in Figure 3 applies.

[0048] In the case of component 3, which is a rotor of an electric motor, as already described, the first end section of the fiber bundle 5 is first fastened to component 3, which can also be referred to as tying. Subsequently, in the first time interval, a plurality of fiber bundle sections of the fiber bundle 5 are applied one after the other to component 3 in the circumferential direction 23 about the axis of rotation 21. The fastening of the first end section of the fiber bundle 5 to component 3 and the application of the plurality of fiber bundle sections to component 3 in the first time interval can also be referred to together as tying. In the first time interval, the mechanical stress present in the fiber bundle section that is next applied to component 3 is lower than the mechanical stress present in the second time interval in the fiber bundle section that is next applied to component 3.Preferably, the mechanical stress present in the first time interval in the fiber bundle section that is next applied to the component 3 is assigned to a first tensile force with which the fiber bundle section that is next applied to the component 3 is loaded, wherein the first tensile force is preferably equal to or less than 500 N, particularly preferably equal to or less than 100 N. Preferably, the mechanical stress present in the second time interval in the fiber bundle section that is next applied to the component 3 is assigned to a second tensile force with which the fiber bundle section that is next applied to the component 3 is loaded, wherein the second tensile force is preferably greater than 500 N.

[0049] After the second time interval, in the third time interval, several fiber bundle sections of the fiber bundle 5 are applied one after the other in the circumferential direction 23 around the rotation axis 21 to the component 3. In the third time interval, the mechanical stress present in the fiber bundle section that is next applied to the component 3 is also lower than the mechanical stress present in the second time interval in the fiber bundle section that is next applied to the component 3. Preferably, the mechanical stress present in the third time interval in the fiber bundle section that is next applied to the component 3 is assigned to a third tensile force with which the fiber bundle section that is next applied to the component 3 is loaded, wherein the third tensile force is preferably equal to or less than 500 N, particularly preferably equal to or less than 100 N.The first tensile force, the second tensile force and the third tensile force can each also be referred to as pre-tensioning force 9 applied to the fiber bundle 5.

[0050] After the third time interval, a second end section of the fiber bundle 5, arranged at a second end of the fiber bundle 5, which extends from the first end to the second end, is separated from a section that is still partially wound on the spool 31, which can also be referred to as tying. The application of the plurality of fiber bundle sections to the component 3 in the third time interval and the separation of the second end section of the fiber bundle 5 arranged at the second end of the fiber bundle 5 from the section that is still partially wound on the spool 31 can also be referred to together as tying.

[0051] During the first time interval and during the third time interval, the fiber bundle sections applied to component 3 are subjected to less mechanical stress than is the case during the second time interval. In particular, if the second tensile force is greater than 500 N in the second time interval, the fiber bundle sections deform more severely perpendicular to their direction of extension and parallel to a preferably cylindrical surface to which they are applied than is the case in the first time interval and in the third time interval. Due to the greater mechanical stress, the fiber bundle sections applied to component 3 during the second time interval are wider in the axial direction and thinner in the radial direction than the fiber bundle sections applied to component 3 during the first time interval and the third time interval. Fig.5 shows an exemplary relationship between the width of a fiber bundle section, which can also be referred to as roving width 7, and the mechanical load on the fiber bundle section, which can also be referred to as pre-tension force 9.If, therefore, the force 27 acting perpendicular to the axis of rotation 21 and in the direction of the axis of rotation 21 during the first time interval and the force 27 acting perpendicular to the axis of rotation 21 and in the direction of the axis of rotation 21 during the second time interval and the force 27 acting perpendicular to the axis of rotation 21 and in the direction of the axis of rotation 21 during the third time interval were identical and the fiber bundle sections applied one after the other to the component 3 in the second time interval abut one another in the guide direction of the fiber bundle 5 along the axis of rotation 21, then regions in which no fibers are arranged would form between the fiber bundle sections applied to the component 3 in the first time interval and in the third time interval.In the event that the fiber bundle 5 comprises fibers pre-impregnated with a resin, pure resin regions would form in these regions, which would lead to undesirable properties of the fiber bundle 5 applied to the component 3. Since, with the aid of the present invention, the fiber bundle sections applied to the component 3 can be subjected to the force 27 acting perpendicular to the axis of rotation 21 and in the direction of the axis of rotation 21, and this can be done with varying strengths, in particular during different time intervals, the formation of pure resin regions can be counteracted or these regions can even be completely prevented.

[0052] Preferably, the fiber bundle sections applied to the component 3, particularly in the bonding and bonding areas, are mechanically rolled out using the pressure roller. The pressure roller is preferably only temporarily brought into contact with the fiber bundle sections applied to the component 3, particularly during the reduction of the pretensioning force 9 during bonding and / or bonding. Due to the pressure force applied in this way, which in the context of the present invention can be generally referred to as force 27, the geometry of the fiber bundle sections applied to the component 3 is widened while reducing the wall thickness, whereby gaps between the individual fiber bundle sections applied to the component 3 are preferably closed. After bonding, the pressure roller is retracted again and the component 3 with the fiber bundle 5 applied to it is released.

[0053] Furthermore, a computer program is provided, which has instructions that cause the application device 1 to execute the steps of the method described here, or at least some of the steps. Furthermore, a computer-readable medium is provided on which the computer program is stored. For example, the application device 1 has the computer-readable medium.

[0054] Even if the method steps are described in a specific order, the present invention is not limited to this order. Rather, the individual method steps can be performed in any meaningful order, in particular at least partially in parallel.

[0055] Additionally, it should be noted that "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. Furthermore, it should be noted that features described with reference to one of the above embodiments can also be used in combination with other features of other embodiments described above. Reference signs in the claims are not to be considered as limitations. Reference symbol 1 application device 3 Component 5 fiber bundles 7 Roving width 9 Preload force 11 Component holding device 13 Drive device 15 Guide device 17 force application device 19 Control device 21 axis of rotation 23 Circumferential direction 25 Direction of rotation 27 force acting perpendicular to the axis of rotation 29 Fiber tension device 31 coil 33 Guide direction through the application device 101 first procedural step 102 second procedural step 103 third procedural step

Claims

[1] Method for applying a fiber bundle (5) to a component (3), the method comprising the following steps, Mounting the component (3) so that it is rotatable about a rotation axis (21), Attaching a first end section of the fiber bundle (5) to the component (3) rotatably mounted about the axis of rotation (21), Bringing the component (3) into a rotational movement about the axis of rotation (21) so that fiber bundle sections of the fiber bundle (5) are applied one after the other in the circumferential direction (23) about the axis of rotation (21) to the component (3), Guiding the fiber bundle (5) along the rotation axis (21) such that the fiber bundle sections are arranged offset from one another along the rotation axis (21), and Applying a force (27) acting perpendicular to the rotation axis (21) and in the direction of the rotation axis (21) to the fiber bundle sections applied to the component (3) during a first time interval by means of a force application device (17). [2] Method according to the preceding claim, wherein the fiber bundle sections applied to the component (3) are subjected to the force (27) acting perpendicular to the axis of rotation (21) and in the direction of the axis of rotation (21) during a second time interval by means of the force application device (17), wherein the force (27) during the first time interval is greater than the force (27) during the second time interval. [3] Method according to claim 1, wherein during a second time interval the force application device (17) is spaced from the fiber bundle sections applied to the component (3). [4] Method according to one of the preceding claims, wherein the fiber bundle sections applied to the component (3) are subjected to the force (27) acting perpendicular to the axis of rotation (21) and in the direction of the axis of rotation (21) during a third time interval by means of the force application device (17), wherein the force (27) during the third time interval is greater than the force (27) during the second time interval. [5] Method according to one of claims 2 to 4, wherein the first time interval is prior to the second time interval. [6] Method according to one of claims 4 or 5, wherein the third time interval is temporally after the second time interval. [7] Method according to one of the preceding claims, wherein the force (27) during the first time interval and / or the force (27) during the second time interval and / or the force (27) during the third time interval is / are constant. [8] Method according to one of the preceding claims, wherein the mechanical stress present in the fiber bundle section which is next applied to the component (3) is detected, wherein the force (27) during the first time interval and / or the force (27) during the second time interval and / or the force (27) during the third time interval is adjusted as a function of the detected mechanical stress. [9] Application device (1) for applying a fiber bundle (5) to a component (3), wherein the application device (1) a component holding device (11) which is designed to support the component (3) rotatably about a rotation axis (21), a drive device (13) which is designed to cause the component (3) to rotate about the axis of rotation (21), so that fiber bundle sections of the fiber bundle (5) are applied one after the other in the circumferential direction (23) about the axis of rotation (21) to the component (3), a guide device (15) which is designed to guide the fibre bundle (5) along the axis of rotation (21) in such a way that the fibre bundle sections are arranged offset from one another along the axis of rotation (21), a force application device (17) which is designed to apply a force (27) acting perpendicular to the axis of rotation (21) and in the direction of the axis of rotation (21) to the fiber bundle sections applied to the component (3). [10] Computer program comprising instructions which cause the application device (1) according to claim 9 to carry out the method steps of the method according to one of claims 1 to 8. [11] A computer-readable medium on which the computer program according to claim 10 is stored.

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