Rotor Blade Tip Mold Assembly With Solid Core for Faster Blade Forming
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Solution Overview
Problem
Current manufacturing processes for rotor blades in wind turbines are not robust, repeatable, and cost-effective, especially for blades exceeding 60m in length, requiring long cycle times and inefficient assembly of multiple pre-fabricated parts.
Innovation Solution
A method and apparatus for forming rotor blades using a rotor blade mold assembly that includes a first and second shell substrate with a profiled solid core, allowing optimized manufacturing processes for each blade segment, such as the root, mid-section, and tip, without bonding steps, reducing cycle time and labor costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If rotor blades are formed by joining multiple pre-fabricated parts using bonding material, then transportation and handling are simplified, but manufacturing robustness and repeatability deteriorate
Solution Approach 1:
The blade is divided into multiple segments (root/mid-section and tip) that are manufactured separately and then joined. This allows each segment to be optimized for its specific manufacturing requirements while enabling transportation of manageable lengths. The segmentation principle resolves the contradiction by allowing separate manufacturing of long blade segments that can be reliably joined.
Solution Approach 2:
The bonding surfaces are prepared in advance during segment manufacturing, with precise positioning features and bonding areas established before final assembly. This preliminary preparation ensures that when segments are joined, the bonding process is robust and repeatable, addressing the reliability concern while maintaining the benefits of segmented construction.
2Length of moving object
If rotor blades are formed by joining multiple pre-fabricated parts using bonding material, then transportation is simplified, but manufacturing cycle time increases
Solution Approach 1:
Bonding surfaces and positioning features are prepared in advance during segment manufacturing, so that final assembly requires minimal additional time. The segments are pre-configured with bonding areas and alignment features, enabling rapid and reliable joining without extensive on-site preparation.
Solution Approach 2:
The bonding material properties and application parameters are optimized to reduce curing time and assembly duration. By adjusting bonding parameters such as material composition, application thickness, and curing conditions, the manufacturing cycle time is reduced while maintaining bond strength and reliability.
3Adaptability or versatility
If bonding material is applied along the length of the blade at shear webs and edges, then multiple parts can be connected, but labor and process complexity increase
Solution Approach 1:
The blade is segmented into standardized sections with consistent bonding interfaces at shear webs and edges. This segmentation allows for modular assembly where the same bonding procedures are repeated at standardized locations, reducing overall process complexity despite the multiple bonding operations required.
Solution Approach 2:
Bonding material application parameters are standardized across all bonding locations (shear webs and edges), with consistent thickness, composition, and curing conditions. This standardization simplifies the manufacturing process by reducing the number of unique parameters that must be controlled, making the complex multi-point bonding process more manageable and repeatable.
Data Source
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AI summary
Methods for forming rotor blade tips, rotor blade mold assemblies, and cores for rotor blade mold assemblies are disclosed. A method includes providing a first shell substrate on a first mold, providing a generally profile shaped solid core on the first shell substrate, and providing a second shell substrate on the generally solid core. A second mold, such as a caul plate, is provided on the second shell substrate. The second mold having a stiffness of one of greater than or less than a stiffness of the first mold. The generally profile shaped solid core comprises a permanent portion of the rotor blade tip. A rotor blade tip formed by the method is also disclosed.