The 5 Core Steps for Marble Platform Maintenance

5 Core Steps for Marble Platform Maintenance

1. Preliminary Detection and Assessment

• Surface Precision Detection: Use high-precision electronic levels, dial indicators, or laser interferometers to measure along the platform's vertical and horizontal axes and diagonals, recording flatness errors (such as local bulges, depressions, or wavy deviations).

• Damage Location: Visually inspect surface scratches, chipped corners, and worn areas. Mark the positions and dimensions of defects to determine if deformation is caused by impact, long-term loading, or environmental changes.

2. Basic Cleaning and Pretreatment

• Deep Dust Removal: Wipe the surface with anhydrous ethanol or special granite cleaner to remove oil stains, metal debris, and oxides, preventing impurities from affecting maintenance precision.

• Crack Repair (if any): Inject epoxy resin adhesive into fine cracks, fix them with special clamps, and cure to prevent crack expansion; large chipped corners need to be marked for subsequent grinding.

3. Grinding Repair Process

• Rough Grinding and Leveling:

◦ Use silicon carbide grinding wheels (80-120 mesh) to grind crosswise along the platform's vertical and horizontal directions, focusing on high-convex areas. Recheck with a level after each grinding pass until the flatness error is reduced to within 0.05mm.

◦ Example: If the platform center bulges by 0.1mm, grind gradually from the center to the periphery to ensure the grinding track covers the entire surface.

• Fine Grinding and Polishing:

◦ Replace with 240-600 mesh diamond grinding discs, grind with coolant circulation to eliminate rough grinding marks, and achieve a surface roughness of Ra≤0.8μm.

◦ Finally, polish by hand with grinding paste above 1000 mesh to restore the platform's mirror gloss and improve the flatness of the measuring surface.

4. Precision Calibration and Acceptance

• 3D Calibration: Use a coordinate measuring machine (CMM) to scan grid points on the entire platform surface (e.g., set a detection point every 500mm×500mm), generate a flatness cloud map, and adjust the error to ≤0.02mm (executed according to GB/T 20428-2006 accuracy grade).

• Comparison Verification: Place a standard straightedge on the platform surface and detect gaps with a feeler gauge. For grade 0 platforms, the feeler gauge with a thickness ≤0.005mm should not be insertable.

5. Maintenance and Protection Treatment

• Surface Sealing: After wiping dry, spray a nano-level protective agent to form a waterproof and oil-proof film, preventing stains from penetrating into the stone pores (maintenance cycle recommended every 6 months).

• Support Optimization: Adjust the platform  (support frame) to a horizontal state, use shock-proof foot pads to isolate ground vibrations, and cover with a dust cloth during long-term storage to avoid heavy pressure or sudden temperature changes.

Notes

• Control the coolant flow during grinding to prevent micro-deformation of marble due to temperature differences;

• Allow the platform to stand for 24 hours after repair to fully release stress before rechecking precision;

For platforms with accuracy requirements higher than grade 0, it is recommended to have them calibrated by a professional metrology institution and issue a certification report.