Method for connecting two wind turbine blade parts, manufacturing a wind turbine, and connecting two molded parts

Abstract

A method for connecting two wind turbine blade parts (12, 13), the method comprising the following steps: a) providing (S1) a first wind turbine blade part (12) and a second wind turbine blade part (13), b) providing (S2) a plurality of first marks (20) on the first blade part (12) and a plurality of second marks (22) on the second blade part (13), c) determining (S4) target positions of the first marks (20) and the second marks (22), d) aligning the wind turbine blade parts (12, 13) with each other (S6) and comparing the actual positions of the first marks (20) and the second marks (21) with the target positions, and e) connecting the wind turbine blade parts (12, 13) together. As a result, the shape accuracy of the wind turbine blade (5) can be improved.

Description

Technical Field

[0001] The invention relates to a method for connecting two wind turbine blade parts, a method for manufacturing a wind turbine and a method for connecting two molded parts. Background Art

[0002] Modern wind turbine rotor blades are made of fiber-reinforced plastic. They typically consist of an airfoil with a rounded leading edge and a sharp trailing edge. The rotor blades are connected to the wind turbine hub at their blade roots. Furthermore, the rotor blades are connected to the hub via pitch bearings, which allow for variable pitching of the rotor blades. Long rotor blades are subject to high wind forces and, therefore, heavy loads.

[0003] Rotor blades can be made from two connected half-shells. As rotor blades become longer, it can be advantageous to manufacture rotor blades that are divided into two or more segments along the longitudinal axis of the blade (i.e., longitudinal segments). Such blade segments are also called spanwise segments. Furthermore, such spanwise segments can be cast separately and then joined together after casting. EP 2 432 972 B1 describes a method for assembling spanwise segments of a wind turbine blade.

[0004] Connecting these spanwise segments of a blade is a challenging task, as they may come from different molds. It is crucial that the blade tip is correctly positioned relative to the blade root and that the blade twists as designed and intended. If this is not the case, the loads across the blade may change, for example during power generation. This can lead to failure, such as the blade striking the tower. Summary of the Invention

[0005] It is an object of the present invention to provide an improved method for connecting two wind turbine blade sections.

[0006] Therefore, a method for connecting two wind turbine blade sections is provided. The method comprises the following steps: a) providing a first wind turbine blade section and a second wind turbine blade section, b) providing a plurality of first markings on the first blade section and a plurality of second markings on the second blade section, c) determining target positions of the first markings and the second markings, d) aligning the wind turbine blade sections with each other and comparing the actual positions of the first markings and the second markings with the target positions, and e) connecting the wind turbine blade sections together.

[0007] Thus, the shape accuracy of wind turbine blades can be improved. For example, two, three, or more blade sections can be connected together. In particular, each blade section includes two blade shells arranged opposite each other and connected to each other. Providing a marking on a blade section means setting a marking. Setting a marking can mean attaching a physical marking to a blade section, creating a physical marking on a blade section, or assigning a digital marking to a blade section. Aligning means moving one or both of the blade sections until the blade sections mate as desired.

[0008] In particular, the first blade part includes an outer surface on which a first marking is provided. Preferably, the second blade part includes an outer surface on which a second marking is provided. In particular, the first marking and the second marking are arranged along the longitudinal direction of the blade. For example, at least three, four, five, six, seven, eight, nine, ten, or more first markings may be provided in step b). In particular, at least three, four, five, six, seven, eight, nine, ten, or more second markings may be provided in step b). Preferably, when the wind turbine blade parts are aligned with each other, the wind turbine blade parts are aligned side by side in the longitudinal direction of the blade.

[0009] According to an embodiment, the first wind turbine blade part is molded by means of a first mold and the second wind turbine blade part is molded by means of a second mold.

[0010] In particular, the first blade part and the second blade part are cast. An advantage of moulding the blade with the aid of at least two moulds is that longer blades can be produced. Preferably, the first mould is a multi-component mould, in particular a two-component mould, and / or the second mould is a multi-component mould, in particular a two-component mould. This has the advantage that after moulding the blade parts can be accessed without having to remove the blade parts from the lower part of the mould carrying the mould. Preferably, the first mould comprises a hollow space having the negative shape of the first blade part, and / or the second mould comprises a hollow space having the negative shape of the second blade part.

[0011] According to another embodiment, step b) is performed when the first wind turbine blade part is in the first mould and / or the second wind turbine blade part is in the second mould.

[0012] This has the advantage that the first blade part and / or the second blade part are substantially stress-free and therefore undeformed. Preferably, step b) is performed during or after the molding process. For example, when step b) is performed, the first blade part is located in the first mold and / or the second blade part is located in the second mold. This provides a large contact surface between the respective blade part and the respective mold.

[0013] According to another embodiment, the initial positions of the first marking and the second marking are determined during or directly after step b).

[0014] Preferably, the initial position is measured and recorded. Thus, even after processing or manipulation of the blade part, the desired shape of the blade part can be reproduced.

[0015] According to another embodiment, the target position of the marker is determined with the aid of the initial positions of the first marker and the second marker.

[0016] Preferably, the initial positions of the first marks relative to each other are set as the target positions of the first marks. In particular, the initial positions of the second marks relative to each other are set as the target positions of the second marks.

[0017] According to another embodiment, the target positions of the first marker and the second marker are determined by setting a relationship between an initial position of the first marker relative to an initial position of the second marker.

[0018] Alternatively or additionally, the target position is determined with the aid of a computer-generated position.For example, the initial position can be combined with the computer-generated positions of the markers to obtain the target positions of the first marker and the second marker.

[0019] According to another embodiment, during step d), the actual position of the first marking and / or the second marking is detected by means of a detection device.

[0020] This has the advantage that a precise alignment can be controlled.Preferably, the detection device comprises a sensor, in particular a plurality of sensors, and / or a camera, in particular a plurality of cameras.

[0021] According to another embodiment, step d) is performed by means of digital image correlation.

[0022] Digital image correlation and tracking is an optical method that uses tracking and image registration techniques to accurately measure image changes in 2D and 3D. This method can be used to measure full-field displacement and strain. Compared to strain gauges and extensometers, digital image correlation can provide both localized and averaged data, increasing the amount of information collected about fine details of deformation during mechanical testing. This has the advantage of enabling real-time measurement and alignment.

[0023] According to another embodiment, step d) is performed by means of a carrying device configured to move the first wind turbine blade part relative to the second wind turbine blade part in at least 3, 4, 5 or 6 degrees of freedom.

[0024] The carrying device may include a first support structure, in particular a first trolley or fork, configured to support the first blade part at one contact surface, and a second support structure, in particular a second trolley or fork, configured to support the first blade part at another contact surface. For example, the first support structure and the second support structure are configured to move relative to each other in the longitudinal direction of the blade when supporting the first blade part. In particular, the second blade part is fixed.

[0025] Preferably, the carrying device is configured to move the first blade part in the longitudinal direction of the blade and / or in the height direction and / or in a lateral direction perpendicular to the longitudinal direction. Preferably, the carrying device is configured to rotate or tilt the first blade part around the longitudinal direction and / or the height direction and / or the lateral direction.

[0026] In particular, the first and second support structures comprise a lifting system for lifting the blade section. For example, the first and second support structures comprise a tilting system for tilting and / or twisting the blade section. Preferably, three, four, five, six or more support structures, in particular dollies or forks, are provided for supporting the first blade section.

[0027] According to another embodiment, the carrying device is configured to move the second wind turbine blade part relative to the first wind turbine blade part in at least 3, 4, 5 or 6 degrees of freedom.

[0028] The carrying device may comprise a third support structure, in particular a third trolley or fork, which is configured to support the second blade part at one contact surface, and a fourth support structure, in particular a fourth trolley or fork, which is configured to support the second blade part at another contact surface. For example, the third support structure and the fourth support structure are configured to move relative to each other in the longitudinal direction of the blade when supporting the second blade part.

[0029] In particular, the third and fourth support structures comprise a lifting system for lifting the second blade section. For example, the third and fourth support structures comprise a tilting system for tilting and / or twisting the second blade section. Preferably, three, four, five, six or more support structures, in particular dollies or forks, are provided for supporting the second blade section.

[0030] According to another embodiment, in steps d) and / or e), the leading edges of the first wind turbine blade part and the second wind turbine blade part face downwards or upwards.

[0031] Thereby, the handling of the blade parts during steps d) and / or e) is improved.

[0032] According to another embodiment, the first marking and the second marking are digitally generated dots and / or are specifically provided on the respective wind turbine blade parts.

[0033] Digitally generated points have the advantage that the setting of these points can be performed, for example, automatically. Specifically set markings (ie physical markings) have the advantage that the points are visible without a device.

[0034] According to another embodiment, the first wind turbine blade part and the second wind turbine blade part are longitudinal segments of the wind turbine blade.

[0035] This means that when the blade is finished the segments are arranged one after the other along the longitudinal axis of the blade.In particular, the angle between the connecting surfaces of the wind turbine blade parts and the longitudinal axis of the wind turbine blade is at least 45°, in particular 90°.

[0036] Furthermore, a method for manufacturing a wind turbine is provided. The method comprises the following steps: a2) connecting two wind turbine blade parts according to the method for connecting two wind turbine blade parts, thereby providing a wind turbine blade, and b2) connecting the wind turbine blade to a hub of the wind turbine.

[0037] Hereby, a wind turbine having long wind turbine blades may be provided.Preferably, the method further comprises the step of providing a tower, a nacelle and a hub of the wind turbine.

[0038] A wind turbine currently refers to a device that converts the kinetic energy of wind into rotational energy, which can be converted by the device again into electrical energy.

[0039] Furthermore, a method for connecting two molded parts is provided. The method comprises the following steps: a3) molding a first part with a first mold and molding a second part with a second mold, b3) providing a first marking on the first part while the first part is in the first mold, and providing a second marking on the second part while the second part is in the second mold, and c3) connecting the first part and the second part together with the first marking and the second marking.

[0040] This has the advantage that when providing the marking, the first part and the second part are substantially stress-free and therefore non-deformed. Thus, the shape accuracy of the two connected parts can be improved. The first part and the second part can be molded by means of casting.

[0041] Providing a marking on the first part means setting a marking. Preferably, during step b3), the first part is located in a first mold and / or the second part is located in a second mold. This provides a large contact surface between the respective parts and the respective molds. Preferably, the first part and the second part are connected to form a component. This component can be, for example, a wind turbine blade or any other component.

[0042] Preferably, the first mold is a multi-part mold, in particular a two-part mold, and / or the second mold is a multi-part mold, in particular a two-part mold. Preferably, the first mold comprises a hollow space having the negative shape of the first part, and / or the second mold comprises a hollow space having the negative shape of the second part.

[0043] The embodiments and features described with reference to the method for manufacturing the inventive wind turbine blade apply mutatis mutandis to the inventive method for connecting two moulded parts and vice versa.

[0044] Further possible implementations or alternatives of the present invention also include combinations of features described above or below with respect to the embodiments not explicitly mentioned herein. A person skilled in the art may also add separate or isolated aspects and features to the most basic form of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Other embodiments, features and advantages of the present invention will become apparent from the ensuing description and the dependent claims considered in conjunction with the accompanying drawings, in which:

[0046] Figure 1 shows a perspective view of a wind turbine according to one embodiment;

[0047] Figure 2 Shown according to Figure 1 a perspective view of a wind turbine blade of a wind turbine;

[0048] Figure 3 showing a perspective view of a first wind turbine blade portion and a second wind turbine blade portion both located in a mold;

[0049] Figure 4 shows a perspective view of a first wind turbine blade part and a second wind turbine blade part carried by a carrying device;

[0050] Figure 5 A perspective view showing the support structure of the carrier device;

[0051] Figure 6 shows a schematic side view of a support structure;

[0052] Figure 7showing a perspective view of a first wind turbine blade portion and a second wind turbine blade portion when the first wind turbine blade portion and the second wind turbine blade portion are aligned with each other;

[0053] Figure 8 A block diagram illustrating a method for connecting two wind turbine blade sections;

[0054] Figure 9 A block diagram illustrating a method for manufacturing a wind turbine; and

[0055] Figure 10 A block diagram showing a method for connecting two molded parts is shown.

[0056] In the drawings, like reference numbers indicate identical or functionally equivalent elements unless otherwise indicated. DETAILED DESCRIPTION

[0057] Figure 1 A wind turbine 1 is shown. The wind turbine 1 comprises a rotor 2 connected to a generator (not shown) arranged within a nacelle 3. The nacelle 3 is arranged at an upper end of a tower 4 of the wind turbine 1.

[0058] Rotor 2 includes three blades 5 (i.e., wind turbine blades). Blades 5 are connected to a hub 6 of wind turbine 1. This type of rotor 2 can have a diameter ranging from, for example, 30 to 300 meters, or even larger. Blades 5 are subject to high wind loads. At the same time, blades 5 need to be lightweight. For these reasons, blades 5 in modern wind turbines 1 are made of fiber-reinforced composite materials, for example by casting. Glass or carbon fibers in the form of unidirectional fiber mats are typically used. Such blades 5 may also include wood and other reinforcement materials.

[0059] Figure 2 A blade 5 is shown. The blade 5 comprises an aerodynamically designed portion 7, shaped to optimally utilize wind energy, and a blade root 8 for connecting the blade 5 to a hub 6. Furthermore, the blade 5 comprises a blade tip 9 facing away from the blade root 8. The blade 5 extends in a longitudinal direction L, which points from the blade root 8 to the blade tip 9. The blade 5 has a length M, which may be, for example, between 15 m and 100 m, or even greater. The wind turbine blade 5 comprises a leading edge 10 and a trailing edge 11.

[0060] Figure 3A perspective view of a blade portion 12 (also referred to as a first blade portion) and a blade portion 13 (also referred to as a second blade portion) is shown. The blade portion 12 comprises a blade tip 9 and the blade portion 13 comprises a blade root 8. Furthermore, the blade portion 12 comprises a connecting surface 23 and the blade portion 13 comprises a connecting surface 24. The blade portions 12, 13 are configured to be connected together at the connecting surfaces 23, 24. For example, the connecting surfaces 23, 24 extend substantially perpendicular to the longitudinal direction L. The blade portions 12, 13 are longitudinal segments of the blade 5 (e.g., see Figure 2 ).

[0061] The blade portion 12 is cast by means of a mold 14 (also called a first mold), and the blade portion 13 is cast by means of a mold 15 (also called a second mold). Preferably, the mold 14 is a multi-part mold comprising a lower mold part 16 and an upper mold part (not shown). For example, Figure 3 As shown in , the upper mould part may be removed after moulding of the blade portion 12. Preferably, the mould 15 is a multi-part mould comprising a lower mould part 17 and an upper mould part (not shown).

[0062] This has the advantage that the blade parts 12, 13 can be accessed after molding without having to remove the blade parts 12, 13 from the lower mold parts 16, 17. Preferably, the mold 14 includes a hollow space 18 having the negative form of the blade part 12. In particular, the mold 15 includes a hollow space (not shown) having the negative form of the blade part 13.

[0063] like Figure 3 As shown in FIG, outer surface 19 of blade portion 12 is exposed. Marking 20 (also referred to as a first marking) is provided on surface 19. Furthermore, outer surface 21 of blade portion 13 is exposed. Marking 22 (also referred to as a second marking) is provided on surface 21. Markings 20, 22 can be set while blade portions 12, 13 are positioned in molds 14, 15. This provides a large contact surface between blade portions 12, 13 and molds 14, 15. This has the advantage that blade portions 12, 13 are substantially stress-free and, therefore, undeformed.

[0064] After providing the markers 20, 22, the initial positions of the markers 20, 22 can be determined, for example, by measuring and recording the initial positions of the markers 20, 22. Alternatively, the target positions of the markers 20, 22 can be determined by setting a relationship between the initial position of the marker 20 and the initial position of the marker 22.

[0065] Alternatively or additionally, the target position can be determined using computer-generated positions. For example, the initial position can be combined with the computer-generated positions of the markers 20, 22 to obtain the target position of the markers 20, 22. The markers 20, 22 can be digitally generated points and / or specifically provided or created on the surfaces 19, 21. In particular, 2-30, 3-10, 3-7, or 4-5 markers 20 are provided. For example, 2-30, 3-10, 3-7, or 4-5 markers 22 are provided. The markers 20 and / or markers 22 can be arranged in at least two rows along the longitudinal direction L.

[0066] Figure 4 A perspective view of blade sections 12, 13 is shown. Blade sections 12, 13 are supported by a support device 25. Support device 25 is configured to move blade section 12 relative to blade section 13 in at least three, four, five, or six degrees of freedom. In particular, support device 25 is configured to move blade section 12 in a longitudinal direction L and / or in a height direction H and / or in a lateral direction Y perpendicular to the height direction H and the longitudinal direction L. Preferably, support device 25 is configured to rotate or tilt blade section 12 about the longitudinal direction L and / or the height direction H and / or the lateral direction Y.

[0067] The carrying device 25 may comprise a support structure 26 (in particular a trolley or a fork) configured to support the blade part 12 at one contact surface 27 and a support structure 28 (in particular a trolley or a fork) configured to support the blade part 12 at another contact surface 29. Preferably, further support structures 30, 31, 32, in particular trolleys or forks, are provided for supporting the blade part 12.

[0068] The carrying device 25 can also be configured to move the blade portion 13 relative to the blade portion 12 in at least 3, 4, 5, or 6 degrees of freedom. In particular, the carrying device 25 is configured to move the blade portion 13 in the longitudinal direction L and / or in the height direction H and / or in a lateral direction Y perpendicular to the height direction. Preferably, the carrying device 25 is configured to rotate or tilt the blade portion 13 about the longitudinal direction L and / or the height direction H and / or the lateral direction Y. The carrying device 25 can include a support structure 33 (in particular a trolley or fork) configured to support the blade portion 13 at one contact surface 34 and a support structure 35 (in particular a trolley or fork) configured to support the blade portion 13 at another contact surface 36.

[0069] Figure 5A perspective view of a support structure 26 of a carrier 25 is shown. The support structure 26 comprises a frame 37 to which wheels 38 are connected. Furthermore, a motor 39 may be provided for driving the support structure 26 by means of the motor 39. Thus, the support structure 26 is configured to move in the longitudinal direction L (see, for example, Figure 7 ).

[0070] Furthermore, the support structure 26 comprises a housing 40 for receiving the blade portion 12. The housing 40 is in contact with the contact surface 27 of the blade portion 12 (see FIG. Figure 4 ) interact with each other, the arcuate surface 41 is provided at a particularly movable holding housing 42, 43. Each housing 42, 43 may be arcuate. The holding housings 42, 43 may be arranged side by side, thereby forming a V-shape or a U-shape.

[0071] Figure 6 1 shows a schematic side view of the carrier 26. The support structure 26 comprises a lifting system 44, in particular a lifting platform, for lifting the receiving portion 40 and the blade portion 12 in a height direction H (see e.g. Figure 7 ). The lifting system 44 may include a hydraulic or pneumatic mechanism (not shown) or an electric motor for lifting.

[0072] For example, an actuator 45 may be provided for adjusting the tilt angle α of each housing 42, 43. The actuator 45 may be a hydraulic, pneumatic, or electric actuator. The actuator 45 and the housings 42, 43 may comprise a tilt system 46 for tilting and / or twisting the blade section 12. All support structures 26, 28, 30, 31, 30, 33, 35 may be designed as described for the support structure 26.

[0073] Figure 7 A perspective view of the blade sections 12, 13 is shown when they are aligned with each other. The carrier device 25 includes a control unit 47 to which all support structures 26, 28, 30, 31, 30, 33, 35 are connected (e.g., electrically and / or via communication means). The control unit 47 can also be connected to a computer 48. Furthermore, a detection device 49 can be provided for detecting the actual position of the markings 20, 22. This has the advantage that precise alignment between the blade sections 12, 13 can be controlled.

[0074] Preferably, the detection device comprises a sensor and / or a camera 50, in particular exactly two cameras 50. The detection device 49 can be connected to a computer 48 and / or a control unit 47. Preferably, digital image correlation is applied to measure the actual position of the markers 20, 21 and / or the movement of the markers 20, 21. Figure 4 and Figure 7, the leading edges 10 of the blade sections 12, 13 face downward. However, the leading edges 10 of the blade sections 12, 13 may face upward. When the support structures 26, 28, 30, 31, 30, 33, 35 are correctly guided so that the blade sections 12, 13 are aligned, the blade sections 12, 13 may be connected together.

[0075] Figure 8 A block diagram of a method for connecting two blade parts 12, 13 is shown. In step S1, a blade part 12 and a blade part 13 are provided. The blade parts can be provided by casting. In step S2, a plurality of markings 20 are provided on the blade part 12 and a plurality of markings 22 are provided on the blade part 13. In an optional step S3, the initial positions of the markings 20, 22 are determined (e.g., when the blade parts are located in the molds 14, 15, see Figure 3 ). Alternatively or additionally, markings 20 , 22 are provided at predetermined positions at the blade parts 12 , 13 .

[0076] In step S4, the target position of the markers 20, 22 is determined. This can be performed by calculating the target position of the connected blade 5, wherein the initial position obtained in step S3 can be used as an input value. In step S5, a detection device 49 is provided for detecting the actual position of the markers 20, 22.

[0077] In step S6, the blade parts 12, 13 are aligned with each other and the actual positions of the marks 20, 22 are compared with the target positions until an acceptable deviation is obtained. In step S7, the blade parts 12, 13 are connected together. In particular, during step S7, the actual positions of the marks 20, 21 are detected by the detection device 49.

[0078] Figure 9 A block diagram of a method for manufacturing a wind turbine is shown. In step S11 a blade 5 is provided which is ready for installation, wherein the blade 5 is provided by a method for connecting two wind turbine blade parts 12, 13 (see Figure 8 ). In step S12, the tower 4 is provided and positioned. In step S13, the nacelle 3 and the hub 6 are connected to the tower 4. In step S14, the blades 5 are connected to the hub 6 of the wind turbine 1.

[0079] Figure 10A block diagram illustrates a method for connecting two molded parts 12 and 13. In step S21, part 12 is molded using mold 14, and part 13 is molded using mold 15. In step S22, while part 12 is in (e.g., located in) mold 14, a marking 20 is provided (e.g., set) on part 12, and while part 13 is in (e.g., located in) mold 15, a marking 22 is provided (e.g., set) on part 13. In step S23, parts 12 and 13 are connected together using markings 20 and 22 to form a component, particularly a blade 5. This improves the shape accuracy of the two connected parts.

[0080] Reference Figure 1-Figure 7 The explained features apply mutatis mutandis to Figures 8-10 method.

[0081] While the invention has been described in terms of preferred embodiments, it will be apparent to those skilled in the art that modifications may be made in all embodiments.

Claims

1. A method for connecting two wind turbine blade sections (12, 13), the method comprising the following steps: a) providing (S1) a first wind turbine blade part (12) and a second wind turbine blade part (13), wherein the first wind turbine blade part (12) is located in a first lower mold part such that an upper portion of an outer surface of the first wind turbine blade part (12) comprises an exposed outer surface of the first wind turbine blade part (12), and the second wind turbine blade part (13) is located in a second lower mold part such that an upper portion of an outer surface of the second wind turbine blade part (13) comprises an exposed outer surface of the second wind turbine blade part (13), b) providing (S2) a plurality of first markings (20) on an exposed outer surface of the first wind turbine blade part (12) when the first wind turbine blade part (12) is in the first lower mould part, and providing a plurality of second markings (22) on an exposed outer surface of the second wind turbine blade part (13) when the second wind turbine blade part (13) is in the second lower mould part, c) determining (S4) target positions of the first mark (20) and the second mark (22) after the first wind turbine blade part (12) has been removed from the first lower mould part and the second wind turbine blade part (13) has been removed from the second lower mould part, d) aligning the wind turbine blade parts (12, 13) with each other (S6) and comparing the actual positions of the first marking (20) and the second marking (22) with the target positions, wherein step d) is performed by means of digital image correlation, and e) Connecting the wind turbine blade parts (12, 13) together (S7).

2. The method according to claim 1, in, In step a), the first wind turbine blade part (12) is molded by means of a first mold (14) comprising the first lower mold part, and the second wind turbine blade part (13) is molded by means of a second mold (15) comprising the second lower mold part.

3. The method according to any one of claims 1 to 2, The initial positions of the first and second markings (20, 22) are determined during or immediately after step b).

4. The method according to claim 3, in, A target position of the first marker (20) and / or the second marker (22) is determined with the aid of the initial position of the first marker (20) and / or the second marker (22).

5. The method according to claim 4, in, The target positions of the first marker (20) and the second marker (22) are determined by setting a relationship between an initial position of the first marker (20) relative to an initial position of the second marker (22).

6. The method according to claim 1, in, During step d), the actual position of the first marking and / or the second marking (20, 22) is detected by means of a detection device (49).

7. The method according to claim 1, in, Step d) is performed by means of a carrying device (25) configured to move the first wind turbine blade part (12) relative to the second wind turbine blade part (13) in at least 3, 4, 5 or 6 degrees of freedom.

8. The method according to claim 7, in, The carrying device (25) is configured to move the second wind turbine blade part (13) relative to the first wind turbine blade part (12) in at least 3, 4, 5 or 6 degrees of freedom.

9. The method according to claim 1, in, In steps d) and / or e), the leading edges (10) of the first wind turbine blade part and the second wind turbine blade part (12, 13) face downwards or upwards.

10. The method according to claim 1, in, The first marking and the second marking (20, 22) are digitally generated points and / or are specifically created on the respective wind turbine blade parts (12, 13).

11. The method according to claim 1, in, The first wind turbine blade part (12) and the second wind turbine blade part (13) are longitudinal sections of the wind turbine blade (5).

12. A method for manufacturing a wind turbine (1), the method comprising the following steps: a2) connecting (S11) two wind turbine blade parts (12, 13) according to the method of any one of claims 1 to 11, such that a wind turbine blade (5) is provided, and b2) Connecting (S14) the wind turbine blade (5) to the hub (6) of the wind turbine (1).

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