The accuracy of aero engine blades is related to the overall performance of the machine, and the three-dimensional contour measurement at the 0.1μm level has become a core manufacturing requirement. Traditional platforms are hard to meet the standards. Granite platforms, with their three major advantages, provide reliable support for precise detection.
Thermal stability builds a precise foundation. The coefficient of thermal expansion of granite is only (4-8) ×10⁻⁶/℃, which is more than 60% lower than that of metals. Under a temperature fluctuation of ±1℃, the size change of a 1-meter-long platform is less than 0.008μm, which can provide a constant reference surface for equipment such as laser interferometers and three-coordinate measuring machines, avoiding the accumulation of measurement errors caused by thermal deformation. Meanwhile, its density reaches 2.6-2.8g/cm³, its compressive strength exceeds 200MPa, it is wear-resistant, and ensures that the accuracy remains unchanged over long-term use.
Outstanding vibration resistance and environmental interference isolation. The aviation workshop vibrates frequently. The unique crystal structure of granite makes its damping ratio reach 0.05-0.1, which is 5-10 times that of metals. It can attenuate more than 90% of the vibration energy within 0.3 seconds. Taking the measurement with a laser tracker as an example, when combined with a granite platform, the laser beam offset can be controlled within ±0.02μm, significantly improving the measurement accuracy of blade profile errors.
The integration of precision craftsmanship and intelligence enhances efficiency. After ultra-precision processing such as magnetorheological polishing, the flatness of the granite platform reaches ±0.1μm/m, and the surface roughness Ra is ≤0.02μm. After being combined with nanoscale grating rulers and AI algorithms, the single-point measurement accuracy reaches 0.05μm, the overall error is reduced to ±0.1μm, the detection efficiency is increased by 30%, and the defect detection rate reaches 99.9%.
Granite platforms, with their stable and reliable performance, safeguard the precise measurement of aero engine blades, promote the upgrading of aviation manufacturing accuracy, and help the industry reach new heights.
Post time: May-22-2025