花崗岩／大理石製プレート：精密産業用基準面の核心的な担い手であり、幅広い産業分野で安定した支持を提供

ソリューションの概要

This granite/marble plate, centered on “high precision of natural materials, stability in all environments, and versatility in multiple scenarios”, addresses the pain points of traditional metal plates such as “significant thermal deformation, susceptibility to rust, and rapid precision degradation”. It provides a one-stop datum solution covering “basic datum support, precision inspection assistance, and machining assembly positioning”.

Leveraging the ultra-low thermal expansion coefficient (granite: 5-8×10⁻⁶/℃; marble: 6-9×10⁻⁶/℃), excellent vibration resistance (vibration attenuation rate ≥85%), and wear-resistant properties of high-density natural stone, it serves as a long-term stable datum platform for industries including precision manufacturing, metrology and testing, electronic semiconductors, and aerospace. It ensures a flatness error of ≤0.003mm/1000mm and a precision retention period of 5-8 years, helping enterprises improve the reliability of inspection data by 30% and reduce equipment maintenance costs by 60%.

コア機能システム

1. マイクロメートル級の精密基準サポート

• Ultimate Flatness Datum: High-density Jinan Green granite (quartz content ≥65%, feldspar ≥25%, no visible impurities) or high-purity marble (calcium carbonate content ≥95%) is selected and processed through a three-stage process of “rough grinding – fine grinding – nano-polishing”. The flatness accuracy reaches Grade 00 (≤0.003mm/1000mm), Grade 0 (≤0.005mm/1000mm), and Grade 1 (≤0.01mm/1000mm). The surface roughness is Ra≤0.02μm (for granite) and Ra≤0.05μm (for marble), providing a unified datum for precision inspection tools such as dial indicators, micrometers, and coordinate measuring machines, and avoiding inspection errors caused by datum deviation of metal plates.
• 全範囲均一な荷重支持：プレートは継ぎ目のない一体構造で、最大単板サイズは4000×6000mm。表面の荷重支持能力は500～2000kg/m²（厚みにより調整可能）です。全範囲における平坦度誤差の変動は0.002mm以内で、半導体チップキャリアのような最小5mmの微細部品から、工作機械のガイドウェイのような最大2mの大規模部品まで、安定した設置が可能です。これにより、局所的な凹みによるワークの傾きや検査ずれを解消します。
• Precise Marking Assistance: Precision scale lines (line width 0.1mm, spacing accuracy ±0.005mm) or positioning grids can be laser-engraved on the plate surface as required. When used with marking needles and squares, it enables dimensional marking and contour calibration of precision parts. The marking accuracy is 40% higher than that of metal plates, reducing the rework rate of subsequent machining.

2. あらゆる環境下での安定稼働を保証

• 超低熱変形制御：天然石の熱膨張係数は鋳鉄のわずか1/2（鋳鉄：11×10⁻⁶/℃）です。周囲温度が-20℃から60℃まで変動する条件下でも、長さ1mの平板の寸法変化は0.001mm以下に抑えられ、温度変化による基準面の傾きを防ぎます。特に、電子半導体工場（定温±1℃）や精密試験室など、温度変化に敏感な用途に最適です。
• Efficient Vibration Isolation: The internal damping coefficient of granite/marble is 3-5 times that of cast iron, which can absorb high-frequency vibrations (50-3000Hz) generated by machine tool operation and personnel movement in the workshop. The vibration amplitude is reduced from 0.015mm (for metal plates) to 0.003mm, reducing the interference of vibration on precision inspection data (e.g., roundness inspection, parallelism calibration), and the inspection repeatability error is reduced by 60%.
• 耐食性と耐摩耗性：石材表面は緻密で非多孔質であり、アルコール、アセトン、切削油など一般的に使用される工業用試薬にも耐え、金属板のような錆や酸化の問題を起こしません。表面硬度は花崗岩でHS70～80、大理石でHS55～65に達し、耐摩耗性は鋳鉄板の2倍以上です。長期間の使用（作業対象物の設置摩擦回数≥10万回）後でも表面摩耗量は≤0.001mmに抑えられるため、頻繁な研磨が不要となり、メンテナンス周期は2年以上に延長されます。

3. 多様な場面への汎用適応

• Precision Inspection Scenarios: Serving as a datum platform for metrology and testing institutions to calibrate gauge blocks, calipers, and micrometers, or as a carrier for enterprises to inspect the roundness of shaft parts and the parallelism of flat parts. When used with roundness meters and levels, high-precision inspection can be completed, and the qualification rate of inspection data is increased to 99.5%.
• 加工補助の場面：CNC工作機械や研削盤において、ワークピースの補助支持台として機能し、大型部品や薄肉部品（例：アルミ合金筐体、ステンレス鋼薄板）に対しても安定した支持を提供することで、加工中の変形を防ぎます。加工後の表面粗さはRa1.6μmからRa0.8μmへと改善されます。
• Assembly Positioning Scenarios: Used for the assembly positioning of mechanical components (e.g., gearboxes, motor end covers). The flatness of the plate ensures the docking accuracy of components. When used with positioning pins and clamps, coaxial assembly of multiple components can be achieved, the assembly efficiency is increased by 30%, and the subsequent debugging time is reduced.

システムの核心構成

典型的な業界適用事例

1. Metrology and Testing Field: Used by a provincial metrology institute for calibrating Grade 0 gauge blocks —— A Grade 00 granite plate (800×600mm) is selected, with a surface roughness of Ra≤0.01μm. The repeatability error of gauge block calibration is reduced from ±0.001mm to ±0.0005mm, meeting the highest requirements of the verification regulation JJG 146-2011 “Gauge Blocks”, and the annual calibration volume is increased by 20%.
2. Precision Bearing Industry: Used by a bearing enterprise for inspecting the roundness of bearing inner ring raceways —— A Grade 0 granite plate (1000×800mm) is adopted, and when used with a roundness meter, the inspection error is reduced from ±0.003mm to ±0.001mm. The qualified rate of finished bearings is increased from 97% to 99.8%, reducing the loss caused by defective products.
3. Semiconductor Equipment Industry: Used by a semiconductor manufacturer for debugging the guideway parallelism of wafer cutting equipment —— An anti-magnetic granite plate (1500×1200mm) is selected, with a thermal deformation of ≤0.0008mm/m. The guideway parallelism error is controlled within ≤0.002mm, and the wafer cutting yield is increased from 95% to 98.5%, meeting the processing requirements of 7nm chips.
4. Construction Machinery Industry: Used by a heavy industry enterprise for assembling excavator hydraulic valve blocks —— A Grade 1 marble plate (2000×1500mm) is used, and the coaxiality error of valve block docking is reduced from ±0.01mm to ±0.003mm. The leakage rate of the hydraulic system after assembly is reduced by 50%, and the service life of the equipment is extended by 2 years.

核心的な競争優位性

• 金属よりも遥かに優れた精度保持性能：天然石は数億年の歳月をかけて形成され、内部構造が安定しているため、金属板に見られる応力緩和や塑性変形の問題がありません。精度保持期間は5～8年（金属板ではわずか1～2年）で、頻繁な校正によるダウンタイムを削減し、企業は年間200時間以上の運転・保守コストを節約できます。
• Extremely Low Maintenance Costs: No painting or rust-proof treatment is required for the surface; daily maintenance only involves wiping with a dust-free cloth, avoiding the maintenance costs of regular rust removal and re-scraping of metal plates (the annual maintenance cost of metal plates is approximately 2,000 yuan, while that of stone plates is only 200 yuan). The full-life cycle cost is reduced by 80%.
• Wide Environmental Adaptability: It can be used for a long time in humid environments (relative humidity ≤90%) and slightly corrosive environments (e.g., electronic workshop cleaning agents, mechanical processing cutting fluids) without the risk of rusting and corrosion of metal plates. Its anti-magnetic property makes it suitable for inspecting magnetic parts (e.g., motor cores, magnetic steels), avoiding magnetic field interference.
• Higher Cost-Effectiveness: Although the initial purchase cost is 20%-30% higher than that of ordinary cast iron plates, combined with a 5-8 year service life and extremely low maintenance costs, the full-life cycle cost is 40% lower than that of metal plates. It is particularly suitable for scenarios requiring long-term precision datums.

全次元カスタマイズサービス

• 基本カスタマイズ：
• サイズのカスタマイズ：板材の長さ・幅は300×300mmから5000×8000mmまで設計可能（特大サイズには継ぎ目加工も対応、継ぎ目部分の平面度誤差は≤0.003mm）。厚さも50mmから300mmまで要件に応じて設定できます。最大耐荷重は3000kg/m²に達します。
• 精度のカスタマイズ：計量校正に適した最高精度のグレード00、精密検査に適したグレード0、通常の機械加工・組立作業に適したグレード1など、さまざまな用途の精度要件に対応しています。
• 機能拡張のカスタマイズ：
• 構造のカスタマイズ：位置決め溝、取付穴、Tスロットの加工（検査治具やワークピースの固定に適しています）や、段差付きの特殊形状プレートのオーダーメイド（複数の高さのワークピースの支持に対応）が可能です。
• 表面処理：超平滑仕上げ（Ra≤0.01μm、光学検査に適しています）、サンドブラストによる防滑処理（重量物の設置に適しています）、および抗磁性処理（モーター検査など強磁場環境に適しています）。
• サポートサービスのカスタマイズ：
• 据付・調整：現場での水平校正サービスを提供し、プレートの水平精度を±0.001mm/m以内に保証。調整用パッドアイロンと組み合わせることで迅速なレベリングが実現します。
• アフターサービス保証：2年間の無償保証と生涯にわたる精密校正サービスを提供（校正周期は1年または2年にカスタマイズ可能）。校正後には検査報告書を発行いたします。
• Supporting Procurement: Inspection fixtures, dust-proof constant temperature covers, and handling equipment can be customized simultaneously, providing a one-stop procurement solution of “plate + auxiliary equipment”.