The 00-grade granite testing platform is a high-precision measuring tool, and its grading standards primarily cover the following aspects:
Geometric Accuracy:
Flatness: The flatness error across the entire platform surface must be extremely small, typically controlled to the micron level. For example, under standard conditions, the flatness deviation must not exceed 0.5 microns, meaning the platform surface is almost completely flat, providing a stable reference for measurement.
Parallelism: Extremely high parallelism is required between different working surfaces to ensure measurement accuracy. For example, the parallelism error between two adjacent working surfaces should be less than 0.3 microns to ensure data reliability when measuring angles or relative positions.
Perpendicularity: The perpendicularity between each working surface and the reference surface must be strictly controlled. Generally, the perpendicularity deviation should be within 0.2 microns, which is crucial for applications requiring vertical measurement, such as three-dimensional coordinate measurement.
Material Properties:
Granite: Granite with a uniform texture and dense structure is typically used as the base material. Its high hardness, excellent wear resistance, and low thermal expansion coefficient ensure the platform’s dimensional stability and resistance to deformation during long-term use. For example, the selected granite should have a Rockwell hardness of 70 or higher to ensure the platform’s excellent wear and scratch resistance.
Stability: 00-grade granite testing platforms undergo rigorous aging treatment during manufacturing to eliminate internal stresses, ensuring stable performance under varying environmental conditions. After treatment, the platform’s dimensional change rate does not exceed 0.001 mm/m per year, meeting the requirements of high-precision measurement.
Surface Quality:
Roughness: The platform’s surface roughness is very low, typically below Ra0.05, resulting in a mirror-like smoothness. This reduces friction and error between the measuring tool and the object being measured, thereby improving measurement accuracy.
Gloss: The platform’s high gloss, typically above 80, not only enhances its aesthetics but also facilitates operator observation of measurement results and calibration.
Measurement Accuracy Stability:
Temperature Stability: Because measurements often require operation in varying temperature environments, a 00-grade granite testing platform must exhibit excellent temperature stability. Generally speaking, the platform’s measurement accuracy should not vary by more than 0.1 microns over a temperature range of -10°C to +30°C, ensuring accurate measurement results under all temperature conditions.
Long-term Stability: The platform’s measurement accuracy should remain stable over long-term use, and after a period of use, its accuracy should not vary beyond the specified range. For example, under normal operating conditions, the platform’s measurement accuracy should not deviate by more than 0.2 microns over a period of one year.
In summary, the grading standards for 00-grade granite testing platforms are extremely stringent, covering multiple aspects including geometric accuracy, material properties, surface quality, and measurement accuracy stability. Only by meeting these high standards can the platform play its vital role in high-precision measurement, providing an accurate and reliable measurement benchmark for scientific research, engineering testing, and quality control.
Post time: Sep-05-2025