Гранитные/мраморные испытательные платформы: решения для высокоточной метрологии и контроля с использованием базовых данных

Обзор решения

This granite/marble testing platform centers on “natural material advantages + precision machining processes”, integrating three key features: natural high stability, micron-level flatness accuracy, and full-scenario adaptability. It is specifically designed to address the pain points of traditional metal testing platforms, such as “significant thermal deformation, susceptibility to rust and corrosion, and poor precision retention”.

Leveraging the extremely low thermal expansion coefficient and excellent anti-magnetic, anti-vibration properties of natural granite/marble, it serves as a datum carrier for precision part inspection, measuring tool calibration, and equipment debugging. It covers industries including precision manufacturing, electronic semiconductors, aerospace, and metrology and testing. It fulfills the inspection requirement of “long-term precision stability and no frequent maintenance”, ensuring an inspection data error of ≤0.001mm, and helps enterprises improve inspection efficiency and data reliability.

Система основных функций

1. Micron-Level Precision Datum Positioning

• Ultra-High Flatness Datum: Natural granite (main components: quartz and feldspar, hardness ≥HS70) or marble (calcium carbonate content ≥95%, hardness HS55-65) is selected and processed through multiple grinding and polishing procedures. The flatness accuracy can reach Grade 00 (≤0.003mm/1000mm) and Grade 0 (≤0.005mm/1000mm), with a surface roughness of Ra≤0.02μm. It provides a stable datum for inspection tools such as dial indicators, micrometers, and coordinate measuring machines.
• Full-Range Uniform Support: The platform surface has no stress deformation, and the full-range flatness error fluctuation is ≤0.002mm. It is suitable for placing and inspecting micro-precision parts (e.g., semiconductor chip carriers) as small as 5mm and large parts (e.g., machine tool guideways) as large as 2m, avoiding inspection deviations caused by local indentation.
• Precise Marking Assistance: Precision scale lines (line width 0.1mm, spacing accuracy ±0.005mm) can be laser-engraved on the surface. When used with marking needles and squares, it enables dimensional marking and contour calibration of precision parts, with marking accuracy 40% higher than that of metal platforms.

2. All-Environment Stability Guarantee

• Ultra-Low Thermal Deformation Characteristics: The thermal expansion coefficient of natural granite is only (5-8)×10⁻⁶/℃, and that of marble is (6-9)×10⁻⁶/℃, which is much lower than that of cast iron (11×10⁻⁶/℃). Under an ambient temperature fluctuation of -20℃~60℃, the flatness change is ≤0.001mm/m, avoiding datum deviation caused by temperature changes.
• Anti-Magnetic, Anti-Corrosion, and Durable: The natural material is non-magnetic and will not interfere with the inspection of magnetic parts (e.g., motor cores, magnetic steels). The surface is dense and non-porous, capable of withstanding commonly used inspection cleaning agents such as alcohol and acetone, without rusting or oxidation. There is no precision degradation caused by surface rust during long-term use.
• Anti-Vibration and Buffering Performance: Natural granite/marble has a high elastic modulus (granite ≥60GPa, marble ≥50GPa), which can absorb environmental vibrations (the vibration attenuation rate is 30% higher than that of cast iron). It reduces the interference of workshop machine tool vibrations on precision inspection and ensures the stability of micron-level inspection data.

3. Multi-Scenario Inspection Adaptation

• Compatibility with Multiple Types of Inspections: Without replacing the platform, it can be adapted to roundness inspection of precision shaft parts, parallelism inspection of flat parts, calibration of measuring tools (e.g., gauge blocks, calipers), and installation and debugging of equipment (e.g., CNC machine tools, laser measuring instruments). It can be efficiently adapted from single-piece inspection to batch sampling inspection.
• Meeting Special Inspection Requirements: For optical inspection scenarios (e.g., lens flatness inspection), an ultra-smooth surface (Ra≤0.01μm) can be provided. For heavy part inspection (e.g., engine cylinder blocks), a thickened tabletop (thickness ≥100mm) can be customized, with a load-bearing capacity of 500kg/m²~2000kg/m².
• Integration of Auxiliary Functions: According to requirements, positioning grooves and mounting holes can be processed on the edge of the platform to adapt to the rapid installation of inspection fixtures and fixed brackets. It can be equipped with anti-slip rubber pads and horizontal adjustment feet, facilitating horizontal calibration of the platform on different workshop floors (horizontal adjustment accuracy ±0.001mm/m).

Основной состав системы

Типичные отраслевые случаи применения

1. Precision Bearing Inspection: Used by a bearing enterprise for roundness inspection of bearing inner ring raceways —— A Grade 00 granite platform (1000×800mm) is adopted, and when used with a roundness meter, the inspection error is reduced from ±0.003mm to ±0.001mm, and the product qualification rate is increased to 99.8%.
2. Measuring Tool Calibration: Used by a metrology and testing institution for calibrating Grade 0 gauge blocks —— A Grade 00 granite platform (800×600mm) is selected, with a surface roughness of Ra≤0.01μm. The calibration repeatability error is ≤0.0005mm, meeting the requirements of the verification regulation JJG 146-2011 “Gauge Blocks”.
3. Semiconductor Equipment Debugging: Used by a semiconductor enterprise for debugging the guideway parallelism of wafer cutting equipment —— An anti-magnetic granite platform (1500×1200mm) is adopted, with a thermal deformation of ≤0.0008mm/m. It ensures a guideway parallelism error of ≤0.002mm and improves the wafer cutting yield.
4. Aerospace Part Inspection: Used by an aerospace enterprise for inspecting the contour of engine blades —— A customized Grade 0 marble platform (2000×1500mm) with positioning grooves is used, and when combined with a coordinate measuring machine, the blade contour inspection accuracy reaches ±0.0015mm, meeting the inspection standards for aviation-grade parts.

Основные конкурентные преимущества

• Strong Precision Retention: The natural material is formed over hundreds of millions of years, with a stable internal structure, and there is no stress release problem of metal platforms. Under normal use, the precision can be maintained for 5-8 years without re-grinding, which is more than 3 times longer than the precision retention period of cast iron platforms.
• Extremely Low Maintenance Costs: No painting or rust-proof treatment is required for the surface, and daily maintenance only involves wiping with a dust-free cloth. It avoids the maintenance costs of regular rust removal and re-scraping of metal platforms, with annual maintenance costs only 1/10 of that of metal platforms.
• Wide Environmental Adaptability: It can be used in humid environments (relative humidity ≤90%) and slightly corrosive environments (e.g., electronic workshop cleaning agents) without the risk of rusting and corrosion of metal platforms. Its anti-magnetic property makes it suitable for inspecting magnetic parts, avoiding magnetic field interference with inspection data.
• Higher Cost-Effectiveness: Although the initial purchase cost is slightly higher than that of ordinary cast iron platforms, considering the 5-8 year service life and extremely low maintenance costs, the full-life cycle cost is 40% lower than that of cast iron platforms. It is particularly suitable for long-term precision inspection scenarios.

Услуги полномерной кастомизации

• Базовая настройка:
• Size Customization: The length and width of the platform can be designed from 300×300mm to 5000×8000mm, and the thickness from 50mm to 300mm according to needs, with a maximum load-bearing capacity of 3000kg/m².
• Precision Customization: Grades 00 (highest precision), 0, and 1 can be customized to meet different inspection precision requirements (e.g., Grade 00 for metrology calibration, Grade 0/1 for regular part inspection).
• Function Extension Customization:
• Structure Customization: Processing of positioning grooves, mounting holes, and T-slots (adapting to the fixing of inspection fixtures), or customization of spliced platforms (solving ultra-large inspection needs).
• Surface Treatment: Ultra-smooth surface treatment (Ra≤0.01μm, adapting to optical inspection), sandblasting anti-slip treatment (adapting to the placement of heavy parts), and anti-magnetic treatment (adapting to strong magnetic environments).
• Supporting Service Customization:
• Installation and Debugging: Providing on-site horizontal calibration services to ensure the platform horizontal accuracy ≤0.001mm/m.
• After-Sales Guarantee: Providing a 2-year free warranty and lifelong precision calibration services (the calibration cycle can be customized to 1 year/2 years).
• Supporting Procurement: Simultaneous customization of inspection fixtures, dust-proof constant temperature covers, and handling equipment, providing a “one-stop procurement” solution.