Granite/Marble Porous Precision Plates (Precision Tooling Platforms): Core Carrier for Multi-Station Tooling Rapid Positioning and Integration

Overview of the Solution

This granite/marble porous precision plate (precision tooling platform) is specifically designed for tooling positioning, multi-station machining, and automated assembly in precision manufacturing. With “precision multi-hole layout + natural material stability + full-range tooling adaptation” as the core, it overcomes the three major pain points of traditional tooling platforms: “insufficient positioning holes leading to poor adaptability, long tool changeover cycles, and easy attenuation of tooling precision”.

Leveraging the ultra-low thermal expansion coefficient (granite: 5-8×10⁻⁶/℃; marble: 6-9×10⁻⁶/℃), high damping vibration resistance (vibration attenuation rate ≥85%), and multi-hole precision machining process of high-density granite (Jinan Green/Taishan Green) and high-purity marble, it achieves a hole position accuracy of ≤±0.005mm and a flatness of ≤0.003mm/1000mm. It supports 30-second rapid changeover of modular tooling and is suitable for scenarios such as multi-station machining of automotive components, semiconductor tooling positioning, and precision mold assembly. It helps enterprises reduce tooling changeover time by 80%, increase production efficiency of multi-variety products by 50%, and ensure long-term stability of tooling positioning accuracy (precision retention period of 5-8 years).

Core Function System

1. Precision Multi-Hole Positioning and Rapid Tooling Adaptation

• Full-Range Precision Multi-Hole Layout: The surface of the plate is processed with precision positioning holes (hole diameter φ6-φ20mm, tolerance H7) in a “matrix/customized pattern”. The hole spacing accuracy is ±0.005mm (standard spacing: 50/100/200mm, non-standard spacing customization supported). A single plate can have up to 2000+ holes (e.g., a 2000×1500mm plate with 100mm spacing layout), covering the entire area of the plate. This solves the limitation of “insufficient local positioning holes” in traditional platforms and supports rapid fixing of tooling at any position.
• Second-Level Changeover of Modular Tooling: Combined with high-precision positioning pins (tolerance h6, fitting gap with positioning holes ≤0.003mm) and quick-locking clamps, it enables 30-second rapid installation and disassembly of modular tooling (such as automotive component fixtures and semiconductor carrier tooling). There is no need to re-calibrate the tooling datum, and the positioning accuracy deviation after changeover is ≤±0.008mm, meeting the demand for rapid tooling changeover in “small-batch, multi-variety” production (e.g., multi-model collinear machining of automotive transmission parts).
• Multi-Station Synchronous Adaptation: Independent stations are divided through the multi-hole layout (e.g., a 2000×1000mm plate can be divided into 4-8 stations). Each station has an independent set of positioning holes, supporting simultaneous installation of multiple sets of tooling and parallel machining/assembly of multiple workpieces. The parallelism between stations is ≤0.005mm/1000mm, ensuring consistent multi-station machining (e.g., multi-station press-fitting of precision connectors).

2. Tooling Integration and Automated Collaboration

• Compatibility with All Types of Tooling: The multi-hole design supports the integration of modular fixtures, vacuum suction cup tooling, pneumatic clamping tooling, and positioning jigs, adapting to the clamping needs of different workpieces (shafts, housings, thin-walled parts). The positioning holes are compatible with ISO standard tooling interfaces, eliminating the need for customized dedicated connectors and reducing tooling development costs by 30%.
• Seamless Connection with Automated Equipment: The plate reserves robot interfaces (such as positioning pin holes and sensor mounting holes) and can collaborate with collaborative robots (UR, KUKA), AGV conveying systems, and visual positioning equipment to realize automatic tooling grabbing and automatic workpiece loading. It supports offline programming to preset tooling positioning parameters, increasing the changeover efficiency of automated production lines by 60% (e.g., automatic positioning of semiconductor wafer carriers).
• Integration of Tooling Precision Compensation: Laser interferometer calibration reference points (interval 500mm, accuracy ±0.0005mm) are reserved on the edge of the plate, allowing regular calibration of hole position accuracy. It supports connection with a tooling precision compensation system, which corrects minor tooling deviations through data feedback to ensure long-term positioning accuracy of ≤±0.006mm.

3. All-Working-Condition Stability and Durability Guarantee

• Material Precision and Vibration Resistance: Granite plates are made of Jinan Green/Taishan Green (quartz content ≥65%, density ≥2.7g/cm³) with a flatness of Grade 00 ≤0.003mm/1000mm. Marble plates are made of high-purity black/beige marble (calcium carbonate ≥95%, density ≥2.75g/cm³) with a flatness of Grade 0 ≤0.005mm/1000mm. Both have high damping characteristics, and the vibration amplitude during tooling machining is ≤0.003mm, avoiding tooling displacement caused by vibration (e.g., positioning of precision grinding tooling).
• Corrosion-Resistant and Wear-Resistant Multi-Hole Structure: The inner wall of the positioning hole is treated with precision honing (roughness Ra≤0.8μm) + nano-ceramic coating (thickness 5-8μm), which can withstand cutting fluids, alcohol, and semiconductor cleaning agents, and is free from rust and wear on the hole wall of metal platforms. The fitting gap change of the positioning hole after repeated insertion and removal (≥100,000 times) is ≤0.002mm, eliminating the need for hole repair and maintenance.
• Optimization of Environmental Adaptability: Granite/marble has a low thermal expansion coefficient. Under a workshop temperature fluctuation of ±5℃, the hole spacing change of a 1m-long plate is ≤0.001mm, avoiding tooling positioning deviations caused by temperature. The surface can be optionally treated with anti-static coating (surface resistance 10⁶-10⁹Ω), adapting to electrostatically sensitive tooling scenarios such as semiconductors and electronic components.

Core Composition of the System

Typical Industry Application Cases

1. Multi-Station Machining of Automotive Components: Used by an automotive enterprise as a tooling platform for multi-model machining of transmission gears —— A Jinan Green granite porous plate (2000×1500mm, φ12mm positioning holes with 100mm spacing) is adopted, supporting simultaneous installation of 6 sets of gear tooling. The changeover time is reduced from 2 hours to 2 minutes, the machining positioning accuracy is ±0.006mm, and the gear meshing qualification rate is increased by 30%.
2. Semiconductor Wafer Carrier Positioning: Used by a semiconductor manufacturer as a tooling platform for 12-inch wafer lithography —— An anti-static granite porous plate (1200×1000mm, φ8mm positioning holes, hole position accuracy ±0.003mm) is selected, combined with vacuum tooling and visual positioning. The positioning deviation of the wafer carrier is ≤±0.002mm, and the lithography overlay accuracy is increased to ±0.001mm, meeting the requirements of the 7nm process.
3. Multi-Station Assembly of Precision Molds: Used by a mold enterprise for the assembly of mobile phone shell mold parts —— A marble porous plate (1500×1000mm, φ10mm positioning holes with 50mm spacing) is used, divided into 8 assembly stations. The part positioning accuracy is ±0.005mm, the assembly efficiency is increased from 10 sets/hour to 25 sets/hour, and the mold assembly gap is ≤0.003mm.
4. Precision Inspection Tooling for Aviation Parts: Used by an aviation enterprise as a tooling platform for engine blade inspection —— A Jinan Green granite porous plate (1800×1200mm, φ16mm positioning holes) is adopted. The positioning deviation after rapid changeover of the inspection tooling is ≤±0.004mm, the repeatability of blade geometric error inspection is ≤±0.002mm, and the inspection efficiency is increased by 45%.

Core Competitive Advantages

• Extremely Flexible Tooling Adaptability: The full-range multi-hole layout supports rapid installation of more than 95% of modular tooling, eliminating the need for customized dedicated platforms. The tooling changeover time is reduced by 80%, solving the cost pain point of “one tooling, one platform” in traditional platforms, and is particularly suitable for small-batch, multi-variety production.
• High Positioning Accuracy and Stability: The hole position accuracy is ±0.005mm (granite)/±0.008mm (marble). Combined with the low thermal expansion characteristics of the material, the precision retention period is 5-8 years (only 1-2 years for metal porous platforms), reducing the time for frequent tooling calibration and saving enterprises more than 200 hours of operation and maintenance costs annually.
• Strong Automated Integration Capability: It reserves interfaces for robots, visual equipment, and AGVs, and can be seamlessly integrated into automated production lines. The automated tooling changeover efficiency is increased by 60%, adapting to the needs of Industry 4.0 intelligent manufacturing.
• Durable and Low Maintenance Costs: The nano-coating of the positioning holes and the wear-resistant characteristics of the stone ensure no obvious wear after 100,000 insertions and removals, and there is no rust or deformation of the hole wall of metal platforms. Daily maintenance only requires wiping with a dust-free cloth, and the annual maintenance cost is less than 1/10 of that of metal platforms.
• Wide Scene Compatibility: It covers all high-end manufacturing scenarios, from automotive multi-station machining and semiconductor electrostatically sensitive tooling to aviation precision inspection. It supports customized special-shaped hole layouts to meet the positioning needs of special tooling (such as circular workpieces and asymmetric tooling).

Full-Dimensional Customization Services

• Multi-Hole Parameter Customization:
• Hole Diameter and Tolerance: φ6-φ20mm (tolerance H7/H8), non-standard hole diameters (such as φ7.5mm, φ18mm) supported;
• Hole Layout Customization: Matrix (50/75/100/200mm spacing), circular (adapting to circular tooling), special-shaped (customized according to tooling positioning points), local dense holes (core positioning area of tooling);
• Hole Depth Customization: 10-50mm (through holes/blind holes optional, flatness of blind hole bottom ≤0.002mm).
• Size and Material Customization:
• Size Customization: 600×400mm-6000×3000mm (splicing supported for extra-large sizes, hole position accuracy at splicing joints ±0.008mm), thickness 80-500mm (adjusted according to tooling weight, load-bearing capacity 5-50 tons/m²);
• Material Selection: Jinan Green granite (Grade 00 accuracy) for ultra-precision tooling (such as semiconductors, aviation), marble (Grade 0 accuracy) for conventional precision tooling, and composite granite (higher cost-effectiveness) for cost-sensitive scenarios.
• Function and Service Customization:
• Function Enhancement: Anti-static coating (semiconductor scenarios), nano-scratch-resistant coating (high-frequency insertion and removal tooling), surface scale lines (assisting tooling positioning);
• Supporting Services: Providing optimization of tooling positioning hole design (based on customer tooling drawings), on-site horizontal calibration (accuracy ±0.001mm/m), and collaborative debugging of tooling and platforms;
• After-Sales Guarantee: Lifelong hole position accuracy calibration services, 24-hour response to emergency failures.