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

Abstract

Described is a method for applying a fiber bundle (5) to a component (3) comprising the following steps: supporting the component (3) such that it is rotatably mounted about a rotation axis (21), attaching a first end section of the fiber bundle (5) to the component (3), causing the component (3) to rotate so that fiber bundle sections of the fiber bundle (5) are applied to the component (3) in the circumferential direction (23), 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), moving the component (3) about the rotation axis (21) and guiding the fiber bundle (5) such that during a first time interval the fiber bundle (5) is rotated with a first pitch and during a second time interval with a second pitch,which are each defined by the distance traveled along the rotation axis (21) of a fiber bundle section (7) during one rotation of the component (3) about the rotation axis (21), is applied to the component (3), and wherein the first pitch is less than the second pitch. Also shown are an application device (1), a computer program, and a computer-readable medium.

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 to achieve optimal positioning of the fiber bundle sections when applied to the component, especially when high mechanical stresses are present in the fiber bundle.

[0004] It is therefore the object of the present invention to achieve an optimal positioning of the fiber bundle sections in the state applied to the component, particularly when high mechanical stresses are present in the fiber bundle.

[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.Moving the component about the axis of rotation and guiding the fiber bundle such that during a first time interval the fiber bundle is applied to the component with a first pitch which is defined by the distance traveled along the axis of rotation by a fiber bundle section during one rotation of the component about the axis of rotation, and during a second time interval the fiber bundle is applied to the component with a second pitch which is defined by the distance traveled along the axis of rotation by a fiber bundle section during one rotation of the component about the axis of rotation, and wherein the first pitch is less than the second pitch.

[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 abut one another in the guide direction of the fiber bundle along the rotation axis. This is achieved in particular by optimally adjusting the first pitch and the second pitch. If two fiber bundle sections applied consecutively to the component abut one another in the guide direction of the fiber bundle along the rotation axis, this can also be described as the two fiber bundle sections being butt-to-butt.

[0008] A key difference between the present invention and the prior art is that the component is moved about the rotation axis and the fiber bundle is guided such that during the first time interval, the fiber bundle is applied to the component with the first pitch, and during the second time interval, the fiber bundle is applied to the component with the second pitch, and wherein the first pitch is less than the second pitch. Because the component rotates about the rotation axis and the fiber bundle is guided along the rotation axis, the fiber bundle is preferably applied to the component such that sections of the fiber bundle extend along a preferably cylindrical spiral.If the component rotates once about the axis of rotation and the guide of the fiber bundle is moved along the axis of rotation during this time, the fiber bundle section covers a distance along the axis of rotation, whereby the distance can also be referred to as the pitch. The fact that the fiber bundle is applied to the component with the first pitch during the first time interval and the fiber bundle is applied to the component with the second pitch during the second time interval, and that the first pitch is less than the second pitch, ensures that the pitch can be adjusted while the fiber bundle is being applied to the component. Particularly when high mechanical stresses are present in the fiber bundle, optimal positioning of the fiber bundle sections when applied to the component can be achieved by adjusting the pitch.

[0009] In summary, it can be stated that with the help of the method, especially when high mechanical stresses are present in the fiber bundle, an optimal positioning of the fiber bundle sections in the state applied to the component can be achieved.

[0010] Preferably, the first pitch and the second pitch are adjusted such that the fiber bundle sections applied successively to the component in the first time interval and those applied successively in the second time interval 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 pitch is smaller than the second pitch 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 one embodiment, during a third time interval, the fiber bundle is applied to the component with a third pitch, which is defined by the distance traveled along the axis of rotation by a fiber bundle section during one rotation of the component about the axis of rotation, and wherein the third pitch is less than the second pitch. Applying the fiber bundle to the component with the third pitch during the third time interval and the third pitch being less than the second pitch ensures that the pitch can be further adjusted during the application of the fiber bundle to the component, so that the positioning of the fiber bundle sections in the applied state can be further optimized. The first time interval can also be referred to as the first time period, the second time period can be referred to as the second time period, and the third time interval can also be referred to as the third time period.

[0012] 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 is first applied to the component with the first pitch, and then the fiber bundle is applied to the component with the second pitch, which is greater than the first pitch. Thus, the pitch can be adjusted during the application of the fiber bundle to the component so that the fiber bundle is first applied to the component with a slight pitch and then with a greater pitch.

[0013] 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 is first applied to the component with the second pitch, and then the fiber bundle is applied to the component with the third pitch, which is smaller than the second pitch. Thus, the pitch can be adjusted during the application of the fiber bundle to the component so that the fiber bundle is first applied to the component with a larger pitch and subsequently with a smaller pitch.

[0014] In one embodiment, the first gradient is / are constant during the first time interval and / or the second gradient is / are constant during the second time interval and / or the third gradient is / are constant during the first time interval and / or the second gradient is / are constant during the second time interval and / or the third gradient is / are constant during the third time interval, the complexity of the control processes can be kept low or even completely eliminated.

[0015] For example, a rotational speed for the rotational movement of the component about the rotational axis and a travel speed of the guide device along the rotational axis can be specified for the first time interval, for the second time interval and / or for the third time interval.

[0016] In one embodiment, the mechanical stress present in the fiber bundle section that is next applied to the component is detected, wherein the first pitch and / or the second pitch and / or the third pitch 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 first pitch and / or the second pitch and / or the third pitch depending on the detected mechanical stress, it is ensured that the pitch can be adjusted particularly quickly and precisely depending on the existing mechanical stress.

[0017] Preferably, the first pitch is constant during the first time interval and the second pitch is constant during the second time interval. Particularly preferably, the first pitch is constant during the first time interval, the second pitch is constant during the second time interval and the third pitch is constant during the third time interval. The first pitch 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 second pitch 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 third pitch is preferably selected such that the fiber bundle sections successively applied to the component during the third time interval abut one another in the guide direction of the fiber bundle along the rotation axis. Furthermore, a 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 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 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, the 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 the force with which the fiber bundle section that is next applied to the component is loaded during the second time interval. In connection with the present invention, a force is frequently mentioned, which can preferably also be referred to as a tensile force, with which the fiber bundle section that is next applied to the component is loaded. The force can preferably also be referred to as a prestressing force.

[0018] Preferably, during the first time interval, the mechanical stress present in the fiber bundle section that is next applied to the component is detected, wherein the first gradient is adjusted as a function of the detected mechanical stress and the second gradient is constant during the second time interval. Particularly preferably, during the first time interval and during the third time interval, the mechanical stress present in the fiber bundle section that is next applied to the component is detected, wherein the first gradient and the third gradient are adjusted as a function of the detected mechanical stress and the second gradient is constant during the second time interval. The first gradient is preferably selected such that the fiber bundle sections applied successively 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 second pitch is preferably selected such that the fiber bundle sections successively applied to the component during the second time interval abut one another in the guide direction of the fiber bundle along the rotation axis. The third pitch is preferably selected such that the fiber bundle sections successively applied to the component during the third time interval abut one another in the guide direction of the fiber bundle along the rotation axis. Furthermore, the 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 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 the force with which the fiber bundle section that is next applied to the component is loaded during the second time interval.

[0019] 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, and yet high mechanical stresses on the fiber bundle sections should be applied after binding and before binding in order to provide a mechanically robust applied fiber bundle. Particularly under high mechanical stresses on the fiber bundle sections, for example, when a force acting on a fiber bundle section is greater than 500 N, the fiber bundle sections deform perpendicular to their direction of extension and parallel to a preferably cylindrical surface to which they are applied, more 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 with lower mechanical stress. By detecting the mechanical stress present in the fiber bundle section that is next applied to the component and adjusting the first pitch and / or the second pitch and / or the third pitch depending on the detected mechanical stress, it is ensured that the pitch 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.

[0020] In one embodiment, the rotational speed of the rotational movement of the component about the rotational axis during the first time interval corresponds to the rotational speed of the rotational movement of the component about the rotational axis during the second time interval. Preferably, if the rotational speed of the rotational movement of the component about the rotational axis during the first time interval corresponds to the rotational speed of the rotational movement of the component about the rotational axis during the second time interval, the pitch is adjusted such that the travel speed of the guide device along the rotational axis during the first time interval is lower than the travel speed of the guide device along the rotational axis during the second time interval.If the rotational speed of the rotational movement of the component about the rotational axis during the first time interval corresponds to the rotational speed of the rotational movement of the component about the rotational axis during the second time interval, the pitch can be adjusted particularly quickly and precisely by changing the travel speed of the guide device along the rotational axis.

[0021] In one embodiment, the rotational speed of the rotational movement of the component about the rotational axis during the third time interval corresponds to the rotational speed of the rotational movement of the component about the rotational axis during the second time interval. Preferably, if the rotational speed of the rotational movement of the component about the rotational axis during the third time interval corresponds to the rotational speed of the rotational movement of the component about the rotational axis during the second time interval, the pitch is adjusted such that the travel speed of the guide device along the rotational axis during the third time interval is lower than the travel speed of the guide device along the rotational axis during the second time interval.If the rotational speed of the rotational movement of the component about the rotational axis during the third time interval corresponds to the rotational speed of the rotational movement of the component about the rotational axis during the second time interval, the pitch can be adjusted particularly quickly and precisely by changing the travel speed of the guide device along the rotational axis.

[0022] In one embodiment, the speed at which the fiber bundle is guided along the rotation axis during the first time interval corresponds to the speed at which the fiber bundle is guided along the rotation axis during the second time interval. If the speed at which the fiber bundle is guided along the rotation axis during the first time interval corresponds to the speed at which the fiber bundle is guided along the rotation axis during the second time interval, the pitch is adjusted by making the rotational speed of the component's rotational movement about the rotation axis during the first time interval greater than the rotational speed of the component's rotational movement about the rotation axis during the second time interval.If the speed at which the fiber bundle is guided along the rotation axis during the first time interval corresponds to the speed at which the fiber bundle is guided along the rotation axis during the second time interval, the pitch can be adjusted particularly quickly and precisely by changing the rotation speed of the rotational movement of the component around the rotation axis.

[0023] Preferably, the speed at which the fiber bundle is guided along the rotation axis during the third time interval corresponds to the speed at which the fiber bundle is guided along the rotation axis during the second time interval. If the speed at which the fiber bundle is guided along the rotation axis during the third time interval corresponds to the speed at which the fiber bundle is guided along the rotation axis during the second time interval, the pitch is adjusted by making the rotational speed of the component's rotational movement about the rotation axis during the third time interval greater than the rotational speed of the component's rotational movement about the rotation axis during the second time interval.If the speed at which the fiber bundle is guided along the rotation axis during the third time interval corresponds to the speed at which the fiber bundle is guided along the rotation axis during the second time interval, the pitch can be adjusted particularly quickly and precisely by changing the rotation speed of the rotational movement of the component around the rotation axis.

[0024] According to a second aspect of the invention, the stated object is achieved by an application device having the features of patent claim 10. 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 an axis of rotation. The application device also has a drive device. The drive device is designed to cause the component to rotate about the axis of rotation so that fiber bundle sections of the fiber bundle are applied to the component one after the other in the circumferential direction about the axis of rotation. The application device also has a guide device. The guide device is designed to guide 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.The application device also has a control device. The control device is designed to transmit control signals to the drive device and the guide device such that the component is moved about the axis of rotation and the fiber bundle is guided such that, during a first time interval, the fiber bundle is applied to the component with a first pitch defined by the distance traveled along the axis of rotation by a fiber bundle section during one rotation of the component about the axis of rotation, and, during a second time interval, the fiber bundle is applied to the component with a second pitch defined by the distance traveled along the axis of rotation by a fiber bundle section during one rotation of the component about the axis of rotation, and wherein the first pitch is less than the second pitch.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 at this point.

[0025] According to a third aspect of the invention, the stated object is achieved by a computer program having the features of patent claim 11. 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.

[0026] According to a fourth aspect of the invention, the stated object is achieved by a computer-readable medium having the features of patent claim 12. 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.

[0027] 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.

[0028] 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 an embodiment of an application device according to the invention, Fig. 3 shows a schematic representation of a component to which a fiber bundle has been applied, Fig. 4 shows a schematic representation of a component and a fiber bundle section applied to the component, and Fig. Figure 5 shows a schematic representation of a relationship between a roving width and a pre-tension force.

[0029] Fig. 1 shows a schematic representation of an embodiment of a method according to the invention, Fig. 2 shows a schematic representation of an embodiment of an application device 1 according to the invention, Fig. Figure 3 shows a schematic representation of a component 3 onto which a fiber bundle 5, which is Fig. 2 is shown in dashed lines, Fig. 4 shows a schematic representation of a component 3 and a fiber bundle section 7 which is applied to the component 3, and Fig. 5 shows a schematic representation of a relationship between a roving width 9 and a pre-tension force 11.

[0030] The Fig. The application device 1 shown in Figure 2 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 13, a drive device 15, a guide device 17, and a control device 19. The component holding device 13, the drive device 15, the guide device 17, and the control device 19 are fastened to a frame (not shown) of the application device 1. The component holding device 13 is designed to mount the component 3 so that it can rotate about an axis of rotation 21. The component 3 can therefore be fastened to the component holding device 13 in order to apply the fiber bundle 5 to the component 3. When fastened to the component holding device 13, the component 3 is mounted so that it can rotate about the axis of rotation 21.

[0031] The drive device 15 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. In the example shown in Figure 2, a circumferential direction 23 and a rotational direction 25 are shown. The component 3 performs a rotational movement around 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 around 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.

[0032] The guide device 17 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 17 can be moved along the axis of rotation 21 and, with the aid of a movement along the axis of rotation 21, can 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 17 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 which 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 7 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 7 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.

[0033] The control device 19 is designed to transmit control signals to the drive device 15 and the guide 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 the component 3 about the rotational axis 21 or a travel speed of the guide device 17 along the rotational axis 21. Using the control signals, the rotational speed for the rotational movement of the component 3 about the rotational axis 21 and / or a travel speed of the guide device 17 along the rotational axis 21 can be set.

[0034] A key difference between the Fig. 2 schematically illustrated embodiment of the application device 1 according to the invention and application devices known from the prior art is that the control device 19 is designed to transmit control signals to the drive device 15 and the guide device 17, so that the component 3 is moved about the axis of rotation 21 and the fiber bundle 5 is guided such that during a first time interval, the fiber bundle 5 is applied to the component 3 with a first pitch, which is defined by the distance traveled along the axis of rotation 21 by a fiber bundle section 7 during one rotation of the component 3 about the axis of rotation 21, and during a second time interval, the fiber bundle 5 is applied to the component 3 with a second pitch, which is defined by the distance traveled along the axis of rotation 21 by a fiber bundle section 7 during one rotation of the component 3 about the axis of rotation 21,where the first gradient is less than the second gradient.,

[0035] The first pitch and the second pitch are each defined by the distance traveled along the rotation axis 21 by a fiber bundle section 7 during one rotation of the component 3 about the rotation axis 21. This definition will be explained below using an example in Fig. 4 shown slope 27 and one in Fig. 4 shown pitch angle 29 will be described in more detail. In Fig. 4, component 3 is shown on the left. Also shown is a fiber bundle section 7 that has already been applied to component 3. As already described, component 3 performs a rotational movement about axis of rotation 21 in order to apply fiber bundle 5 to component 3. Furthermore, fiber bundle 5 is guided along axis of rotation 21 such that the fiber bundle sections are arranged offset from one another along axis of rotation 21. By applying fiber bundle 5 to component 3 in this way, sections of fiber bundle 5 can extend along a preferably cylindrical spiral. When component 3 rotates once about axis of rotation 21 and the guide of fiber bundle 5 is moved along axis of rotation 21 during this time, fiber bundle section 7 covers the distance along axis of rotation 21, wherein the distance can also be referred to as gradient 27.

[0036] In Fig. 4, a triangle is shown on the right, forming a section of the cylinder's lateral surface extending in a plane, which defines the outer surface of component 3. The triangle shows the pitch 27. The pitch angle 29 is also shown. Depending on the circumference 31 of the cylinder's lateral surface and the pitch 27, the pitch angle 29 is clearly defined.

[0037] In Fig. 4 shows, by way of example, a fiber bundle section 7 on the left, which can also be referred to as the first fiber bundle section, and a fiber bundle section 7 on the right, which can also be referred to as the second fiber bundle section. The first fiber bundle section and the second fiber bundle section are shown spaced apart from one another in the guiding direction of the fiber bundle 5 along the rotation axis 21 for a better description of the pitch 27 and the pitch angle 29. If the first fiber bundle section and the second fiber bundle section are arranged spaced apart from one another in the guiding direction of the fiber bundle 5 along the rotation axis 21, this situation falls under the situation that the first fiber bundle section and the second fiber bundle section are arranged offset from one another along the rotation axis 21.Alternatively, and preferably according to the invention, the first fiber bundle section and the second fiber bundle section can be arranged so as to be adjacent to one another in the guiding direction of the fiber bundle 5 along the axis of rotation 21. This is achieved in particular by an optimal adjustment of the first pitch, the second pitch and the third pitch. If the first fiber bundle section and the second fiber bundle section abut one another in the guiding direction of the fiber bundle 5 along the axis of rotation 21, this can also be referred to as the first fiber bundle section and the second fiber bundle section being arranged butt-to-butt. Alternatively, the first fiber bundle section and the second fiber bundle section can also overlap one another at least in sections in the guiding direction of the fiber bundle 5 along the axis of rotation 21, as seen in the guiding direction.The first fiber bundle section described here and the second fiber bundle section described here as well as the position of the first fiber bundle section and the second fiber bundle section relative to one another represent each pair of fiber bundle sections applied directly one after the other to the component 3, so that each fiber bundle section 7 preferably rests against its two adjacent fiber bundle sections.

[0038] The Fig. 4 serves to illustrate the definition of the pitch 27. According to the invention, it is preferred that a plurality of fiber bundle sections abut one another as seen 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 which is arranged directly on the component 3 and a second section of the fiber bundle 5 forms a second layer which is arranged directly on the first layer and perpendicular to the axis of rotation 21 radially outward relative to the first layer. Preferably, further sections of the fiber bundle 5 form further layers, which are each arranged on top of one another and perpendicular to the axis of rotation 21 radially outward relative to one another.Thus, if a layer has already been applied to component 3, a corresponding triangle is selected that forms a section of the cylinder's lateral surface, which defines the outer surface of component 3 with the layer already applied to component 3. Thus, with increasing layers, the circumference 31 of the cylinder's lateral surface increases.

[0039] With a specific rotational speed of the component 3 about the axis of rotation 21 and with a specific travel speed of the guide device 17 along the axis of rotation 21, the pitch 27 can be set for a specific circumference 31 of the outer surface of the cylinder. If, for example, the rotational speed is increased, this reduces the pitch 27. If, for example, the rotational speed is reduced, this increases the pitch 27. If, for example, the travel speed of the guide device 17 along the axis of rotation 21 is increased, this increases the pitch 27. If, for example, the travel speed of the guide device 17 along the axis of rotation 21 is reduced, this reduces the pitch 27. The pitch 27 can therefore be set by changing the rotational speed and the travel speed.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Furthermore, in the third method step 103, the component 3 is moved about the axis of rotation 21 and the fiber bundle 5 is guided such that during a first time interval during the third method step 103, the fiber bundle 5 is applied to the component 3 with a first pitch, which is defined by the distance traveled along the axis of rotation 21 by a fiber bundle section 7 during one rotation of the component 3 about the axis of rotation 21, and during a second time interval, the fiber bundle 5 is applied to the component 3 with a second pitch, which is defined by the distance traveled along the axis of rotation 21 by a fiber bundle section 7 during one rotation of the component 3 about the axis of rotation 21, and wherein the first pitch is less than the second pitch.

[0045] The fact that the fiber bundle 5 is applied to the component 3 with the first pitch during the first time interval, and the fiber bundle 5 is applied to the component 3 with the second pitch during the second time interval, and the first pitch is less than the second pitch, ensures that the pitch 27 can be adjusted during the application of the fiber bundle 5 to the component 3. In particular, when high mechanical stresses are present in the fiber bundle 5, optimal positioning of the fiber bundle sections in the state applied to the component 3 can be achieved by adjusting the pitch 27. 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 5 is first applied to the component 3 with the first pitch, and then the fiber bundle 5 is applied to the component 3 with the second pitch, which is greater than the first pitch. Thus, the pitch 27 can be adjusted during the application of the fiber bundle 5 to the component 3 such that the fiber bundle 5 is first applied to the component 3 with a small pitch 27 and then with a larger pitch 27.

[0046] Furthermore, in the third method step 103, during a third time interval, the fiber bundle 5 is applied to the component 3 with a third pitch, which is defined by the distance traveled along the axis of rotation 21 by a fiber bundle section 7 during one rotation of the component 3 about the axis of rotation 21, wherein the third pitch is less than the second pitch. The fact that the fiber bundle 5 is applied to the component 3 with the third pitch during the third time interval and the third pitch is less than the second pitch ensures that the pitch 27 can be further adjusted during the application of the fiber bundle 5 to the component 3, so that the positioning of the fiber bundle sections in the state applied to the component 3 can be further optimized. The third time interval lies after the second time interval.The fact that the third time interval occurs after the second time interval ensures that the fiber bundle 5 is first applied to the component 3 with the second pitch, and then the fiber bundle 5 is applied to the component 3 with the third pitch, which is smaller than the second pitch. Thus, the pitch 27 can be adjusted during the application of the fiber bundle 5 to the component 3 such that the fiber bundle 5 is first applied to the component 3 with a larger pitch 27 and then with a smaller pitch 27.

[0047] Preferably, the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the first time interval corresponds to the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the second time interval. If the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the first time interval corresponds to the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the second time interval, the pitch 27 is adjusted such that the travel speed of the guide device 17 along the rotational axis 21 during the first time interval is lower than the travel speed of the guide device 17 along the rotational axis 21 during the second time interval.If the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the first time interval corresponds to the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the second time interval, the pitch 27 can be adjusted particularly quickly and precisely by changing the travel speed of the guide device 17 along the rotational axis 21.

[0048] Furthermore, it is preferably provided that the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the third time interval corresponds to the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the second time interval. If the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the third time interval corresponds to the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the second time interval, the pitch 27 is adjusted in such a way that the travel speed of the guide device 17 along the rotational axis 21 during the third time interval is lower than the travel speed of the guide device 17 along the rotational axis 21 during the second time interval.If the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the third time interval corresponds to the rotational speed of the rotational movement of the component 3 about the rotational axis 21 during the second time interval, the pitch 27 can be adjusted particularly quickly and precisely by changing the travel speed of the guide device 17 along the rotational axis 21.

[0049] 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. If 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, the gradient 27 is adjusted in that the rotational speed of the rotational movement of the component 3 about the axis of rotation 21 during the first time interval is greater than the rotational speed of the rotational movement of the component 3 about the axis of rotation 21 during the second time interval.If the speed at which the fiber bundle 5 is guided along the rotation axis 21 during the first time interval corresponds to the speed at which the fiber bundle 5 is guided along the rotation axis 21 during the second time interval, the pitch 27 can be adjusted particularly quickly and precisely by changing the rotational speed of the rotational movement of the component 3 about the rotation axis 21.

[0050] Furthermore, it is preferably provided that the speed at which the fiber bundle 5 is guided along the axis of rotation 21 during the third 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. If the speed at which the fiber bundle 5 is guided along the axis of rotation 21 during the third 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, the gradient 27 is adjusted in that the rotational speed of the rotational movement of the component 3 about the axis of rotation 21 during the third time interval is greater than the rotational speed of the rotational movement of the component 3 about the axis of rotation 21 during the second time interval.If the speed at which the fiber bundle 5 is guided along the rotation axis 21 during the third time interval corresponds to the speed at which the fiber bundle 5 is guided along the rotation axis 21 during the second time interval, the pitch 27 can be adjusted particularly quickly and precisely by changing the rotational speed of the rotational movement of the component 3 about the rotation axis 21.

[0051] Preferably, the first gradient is / are constant during the first time interval and / or the second gradient is / are constant during the second time interval and / or the third gradient is / are constant during the first time interval and / or the second gradient is / are constant during the second time interval and / or the third gradient is / are constant during the third time interval, the complexity of the control processes can be kept low or control processes can even be dispensed with entirely. For example, a rotational speed for the rotational movement of the component 3 about the rotational axis 21 and a travel speed of the guide device 17 along the rotational axis 21 can be predetermined for the first time interval, for the second time interval and / or for the third time interval.

[0052] Preferably, the mechanical stress present in the fiber bundle section 7 that is next applied to the component 3 is detected, wherein the first pitch and / or the second pitch and / or the third pitch is adjusted depending on the detected mechanical stress. By detecting the mechanical stress present in the fiber bundle section 7 that is next applied to the component 3 and adjusting the first pitch and / or the second pitch and / or the third pitch depending on the detected mechanical stress, it is ensured that the pitch 27 can be adjusted particularly quickly and precisely depending on the existing mechanical stress.

[0053] The Fig. The application device 1 shown in Figure 2 has a fiber tensioning device 33. With the help of the fiber tensioning device 33, a mechanical tension present in the fiber bundle 5 can be set and determined. The fiber tensioning device 33 has three deflection rollers. The fiber tensioning device 33 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 33 and the component 3.In this way, the mechanical tension present in the fiber bundle section 7, which is next applied to the component 3, can be adjusted. The fiber tensioning device 33 therefore has a thread brake or can provide the function of a thread brake. The fiber tensioning device 33 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 pretensioning force 11 or tensile force, and from which a mechanical tension present in the fiber bundle 5 in the region of the fiber tensioning device 33 can then be determined. In this way, the mechanical tension present in the fiber bundle section 7, which is next applied to the component 3, can be detected with the help of the fiber tensioning device 33.The fiber tension device 33 transmits a signal representing the detected mechanical tension present in the fiber bundle section 7, which 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 first pitch and / or the second pitch and / or the third pitch as a function of the detected mechanical stress. Subsequently, the control device 19 uses the first pitch and / or the second pitch and / or the third pitch to determine a corresponding rotational speed for the rotational movement of the component 3 about the rotational axis 21 and a corresponding travel speed of the guide device 17 along the rotational axis 21 for the first time interval and / or for the second time interval and / or for the third time interval.The control device 19 then transmits control signals to the drive device 15 and to the guide device 17, which represent the corresponding rotational speeds and corresponding travel speeds determined for the first time interval and / or for the second time interval and / or for the third time interval. Thus, the pitch 27 can be adjusted particularly quickly and precisely depending on the existing mechanical tension.

[0054] The fiber bundle 5 is provided wound on a spool 35. The spool 35 is rotatably attached to a spool stand so that sections of the fiber bundle 5 can be gradually provided by a rotating movement of the spool 35. 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 37 through the application device 1 so that the fiber bundle 5 can be conveyed along the guide direction 37 by the application device 1. The component 3 is rotatably mounted as already described, and a rotating 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 5 along the rotation axis 21 and the guiding direction 37 through the application device 1.

[0055] 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 7 that is next applied to component 3 is lower than the mechanical stress present in the second time interval in the fiber bundle section 7 that is next applied to component 3.Preferably, the mechanical stress present in the first time interval in the fiber bundle section 7 that is next applied to the component 3 is assigned to a first force with which the fiber bundle section 7 that is next applied to the component 3 is loaded, wherein the first 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 7 that is next applied to the component 3 is assigned to a second force with which the fiber bundle section 7 that is next applied to the component 3 is loaded, wherein the second force is preferably greater than 500 N.

[0056] After the second time interval, in the third time interval, several fiber bundle sections of the fiber bundle 5 are applied successively 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 7 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 7 that is next applied to the component 3. Preferably, the mechanical stress present in the third time interval in the fiber bundle section 7 that is next applied to the component 3 is assigned to a third force with which the fiber bundle section 7 that is next applied to the component 3 is loaded, wherein the third force is preferably equal to or less than 500 N, particularly preferably equal to or less than 100 N.The first force, the second force and the third force can each also be referred to as tensile force or pre-tensioning force 11 applied to the fiber bundle 5.

[0057] 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 35, 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 35 can also be referred to together as tying.

[0058] 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, when the second 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 7, which can also be referred to as roving width 9, and the mechanical load on the fiber bundle section 7, which can also be referred to as prestressing force 11. If the first pitch, the second pitch, and the third pitch were identical, and the fiber bundle sections applied successively to the component 3 in the second time interval abut one another in the guiding direction of the fiber bundle along the rotation axis 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 first slope is less than the second slope and the third slope is less than the second slope, the formation of pure resin regions can be counteracted or these regions can even be completely prevented.

[0059] 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.

[0060] 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.

[0061] 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 Fiber bundle section 9 Roving width 11 Preload force 13 Component holding device 15 Drive device 17 Guide device 19 Control device 21 axis of rotation 23 Circumferential direction 25 Direction of rotation 27 gradient 29 pitch angle 31 Circumference of a lateral surface of a cylinder 33 Fiber tension device 35 coil 37 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), Moving the component (3) around the axis of rotation (21) and guiding the fiber bundle (5) so that during a first time interval, the fiber bundle (5) is applied to the component (3) with a first pitch, which is defined by the distance traveled along the axis of rotation (21) by a fiber bundle section (7) during one rotation of the component (3) about the axis of rotation (21), and during a second time interval, the fiber bundle (5) is applied to the component (3) with a second pitch, which is defined by the distance traveled along the axis of rotation (21) by a fiber bundle section (7) during one rotation of the component (3) about the axis of rotation (21), and wherein the first pitch is less than the second pitch. [2] Method according to the preceding claim, wherein during a third time interval the fiber bundle (5) is applied to the component (3) with a third pitch, which is defined by the distance traveled along the axis of rotation (21) of a fiber bundle section (7) during one rotation of the component (3) about the axis of rotation (21), and wherein the third pitch is less than the second pitch. [3] Method according to one of the preceding claims, wherein the first time interval is prior to the second time interval. [4] Method according to one of claims 2 or 3, wherein the third time interval is temporally after the second time interval. [5] Method according to one of the preceding claims, wherein the first gradient is / are constant during the first time interval and / or the second gradient is / are constant during the second time interval and / or the third gradient is / are constant during the third time interval. [6] Method according to one of the preceding claims, wherein the mechanical stress present in the fiber bundle section (7) which is next applied to the component (3) is detected, wherein the first pitch and / or the second pitch and / or the third pitch is adjusted as a function of the detected mechanical stress. [7] Method according to one of the preceding claims, wherein the rotational speed of the rotational movement of the component (3) about the rotational axis (21) during the first time interval corresponds to the rotational speed of the rotational movement of the component (3) about the rotational axis (21) during the second time interval. [8] Method according to one of the preceding claims, wherein the rotational speed of the rotational movement of the component (3) about the rotational axis (21) during the third time interval corresponds to the rotational speed of the rotational movement of the component (3) about the rotational axis (21) during the second time interval. [9] Method according to one of the preceding claims, wherein the speed at which the fiber bundle (5) is guided along the rotation axis (21) during the first time interval corresponds to the speed at which the fiber bundle (5) is guided along the rotation axis (21) during the second time interval. [10] Application device (1) for applying a fiber bundle (5) to a component (3), wherein the application device (1) a component holding device (13) which is designed to support the component (3) rotatably about an axis of rotation (21), a drive device (15) 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 (17) 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 control device (19) which is designed to transmit control signals to the drive device (15) and the guide device (17) so that the component (3) is moved about the axis of rotation (21) and the fiber bundle (5) is guided so that during a first time interval, the fiber bundle (5) is applied to the component (3) with a first pitch, which is defined by the distance traveled along the axis of rotation (21) by a fiber bundle section (7) during one rotation of the component (3) about the axis of rotation (21), and during a second time interval, the fiber bundle (5) is applied to the component (3) with a second pitch, which is defined by the distance traveled along the axis of rotation (21) by a fiber bundle section (7) during one rotation of the component (3) about the axis of rotation (21), and wherein the first pitch is less than the second pitch. [11] Computer program comprising instructions which cause the application device (1) according to claim 10 to carry out the method steps of the method according to one of claims 1 to 9. [12] A computer-readable medium on which the computer program according to claim 11 is stored.

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