Fan blade
ZEISS AEROSPACE SOLUTIONS

Fan Blade

Accelerate your efficiency

Fan blades often produce 90 % of an engine's thrust, making them crucial for jet-engine performance and efficiency. However, the fan blade's large size, unique geometries, and the variety of materials used in the manufacturing process create challenges for measurement and inspection. Inaccuracies in the shape of the leading edge and airfoil surface (bend, twist, and thickness) will decrease engine efficiency and thrust.

High accuracy and repeatable measurements are required throughout the fan blades' product lifecycle to ensure peak engine performance.

ZEISS metal and composite fan blade solutions throughout the production process

The fan blade has undergone substantial changes over the years and is readily discernible by travelers. From the tiny "clapper" design to the current modern composite blades, their primary purpose remains to generate thrust during take-off, cruise, and landing. These blades are essential for engine efficiency, as they propel air around the bypass most efficiently. The design of the airfoil, including the bow, sweep, twist, and lean, is engineered precisely, requiring high-quality tools like those available from ZEISS.

Metal fan blade

The go-to manufacturing method for jet engines

Metal fan blades, made mainly of aluminum and titanium, have been the go-to manufacturing method for jet engines since their inception. The blades' design complexity has pushed the boundaries of manufacturing methods. Over time, the blades have evolved significantly from simple geometries and solid materials to three-dimensional swept airfoils with hollow or honeycomb structures. As these blades have evolved, the number of blades per engine has decreased while their size and cost of production have increased.

Quality gates and solutions for metal fan blades

Metal fan blades

Click through all process steps

  • Forging process

    Forging process

    Significantly enhancing conventional forging processes, ZEISS's state-of-the-art solutions and analysis have the potential to lead to heightened productivity and improved first-time accuracy rates ultimately.

    The challenge
    The die for the forging process is paramount to the production of the fan blade. ZEISS technologies ensure the die and subsequent blades conform.

    Our solution
    ZEISS technologies excel in digitally capturing and analyzing in 2D and 3D the conformity of the blades and the life and wear of the die, providing invaluable insights.

  • Airfoil edge finishing

    Airfoil edge finishing

    The process of airfoil edge finishing involves taking the forged airfoil, which often has "squared edges," and shaping the leading and trailing edges to their final form. At this stage, it is also typical to inspect the internal cavities of the blade, whether they are honeycomb or web structures, to ensure their integrity.

    The challenge
    Due to the twist, lean, and edge shape combination, the measurement and inspection task is very demanding. It is challenging to measure the impact of tiny features on the edges compared to the size of the blade. Additionally, the blade size and material properties make internal characteristic inspection demanding.

    Our solution

    • Digitally capture and analyze in 2D and 3D the conformity of the whole airfoil, including the intricate edges.
    • ZEISS solutions measure the highest resolution and accuracy to analyze the edge: regular radius, elliptical shape, etc.
    • ZEISS offers CT solutions for checking the internal structure.
  • Root/tip machining

    Root/tip machining

    The final machining ensures the part is fit for its intended final use. The tip clearances are critical to gas leakage to the casing and the root form for its precision fit to the fan disc.

    The challenge
    The overall size of the component, sometimes beyond 1.5 meters, in combination with the small tolerances on the root form, demands that the right technology, probes, or sensors be selected.

    Our solution
    The ZEISS solutions, known for their versatility, are complementary and can be effectively used with tactile CMMs or ATOS ScanBox, providing a comprehensive set of tools for the task at hand.

  • Final validation

    Final validation

    Regulatory and OEM requirements like AS9102 or AS13003 are comprehensive and stringent, demanding our utmost attention and adherence.

    The challenge
    Fan blades are often deemed critical parts due to the impact they would have if they failed in service; as such, the validation requirements to demonstrate airworthiness are some of the most demanding in the engine.

    Our solution

    • High-accuracy tactile, optical, and microscopy solutions to fulfill thousands of characteristics necessary to validate.
    • ZEISS Quality Suite helps to compile the results effectively.
    • Specific software like ZEISS INSPECT Airfoil efficiently qualifies every characteristic on part drawings or other standards.

Composite fan blade

An evolution in fan blade design

The development of composite fan blades represents an evolution in fan blade design. These blades offer improved material properties and can often be much larger due to their reduced weight. However, this development has only recently been feasible because the manufacturing process requires high skill when done manually or otherwise, which involves high costs and extensive development for automated processes. Nevertheless, the outcome is high-performing blades prominently featured in the most modern jet engines.

Quality gates and solutions for composite fan blades

Composite fan blades

Click through all process steps

  • Carbon fiber layup and trim

    Carbon fiber layup and trim

    Modern manufacturing techniques must align with modern analysis methods. Carbon fiber fan blades' production involves labor-intensive processes that rely heavily on accurate shaping tools, and layup dies to achieve the critical shape.

    The challenge
    Regular checks for wear on the shaping die tool are crucial. It's the key to maintaining the overall shape of the blade and airfoil.

    Our solution
    ZEISS technologies are great for digitally capturing and analyzing die conformity, life, and wear in 2D and 3D.

  • Resin injection and curing

    Resin injection and curing

    Once the fiber is laid, the resin is added to provide rigidity, and the part is cured into its final airfoil shape.

    The challenge
    The final parts change naturally during forming, molding, or shaping.

    Our solution
    ZEISS technologies excel in digitally capturing and analyzing 2D and 3D conformance to the part in the mold. This process is instrumental in understanding and implementing long-term improvements.

  • Finish machining

    Finish machining

    The final machining of the root and tip is crucial for optimal performance and functionality. The root forms have small tolerance requirements to ensure a perfect match with the disc, while the tip dimensions are essential to prevent gas leakage between the blade and the casing. Such leakage would lead to inefficiencies in engine performance.

    The challenge
    The component's overall size, often exceeding 1.5 meters, along with the narrow tolerances on the root form, requires careful selection of the appropriate technology, probes, or sensors.

    Our solution
    ZEISS technologies are excellent for digitally capturing and analyzing in 2D and 3D the conformance of the part in the mold and when it's out to develop process understanding for long-term improvements.

  • Metal leading edge

    Metal leading edge

    The metal leading edge is a masterpiece. It consists of a single piece of freeform geometry carefully bonded to the primary carbon blade.

    The challenge
    Verifying the metal edge's complex external and internal shape is time-consuming and expensive, often requiring dedicated fixturing.

    Our solution

    • ZEISS optical technology allows measurement of external shape and form and, due to features like virtual clamping, removes the need for hard fixturing.
    • ZEISS tactile technologies, designed for efficiency, verify features with the highest accuracy, ensuring a reliable verification process.
  • Final validation

    Final validation

    Adhering to regulations and OEM requirements, such as AS9102 and AS13003, is essential for ensuring comprehensive compliance and high standards.

    The challenge
    Fan blades are often deemed critical due to the impact if they fail in service; as such, the validation requirements to demonstrate airworthiness are some of the most demanding in the engine.

    Our solution

    • The high-accuracy tactile, optical, and microscopy solutions satisfy numerous essential characteristics required for validation.
    • ZEISS Quality Suite enables the valuable compilation of results.
    • Specific software such as ZEISS INSPECT Airfoil enables efficient qualification of every characteristic on part drawings or other standards.

Quality control for fan blades

Maintenance, repair, and overhaul (MRO)
Maintenance, repair, and overhaul (MRO)

Maintenance, repair, and overhaul (MRO)

Maximizing the efficiency of fan blades cost-effectively

Managing maintenance and repair costs is crucial throughout a product's life cycle. Time is of the essence when getting fan blades back in operation. Now more than ever, OEMs require high-speed measuring systems and software to promptly predict service needs, failures, and overhauls.

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