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On-Site Installation and Grinding of Granite Platform 1.Installation Process Site Preparation Ensure a stable foundation(concrete base with vibration isolation if needed) Levelness ......
On-Site Installation and Grinding of Granite Platform
1.Installation Process
Site Preparation
Ensure a stable foundation(concrete base with vibration isolation if needed)
Levelness tolerance:≤0.05mm/m before installation
Handling&Positioning
Use vacuum lifters or crane with nylon slings to prevent edge damage
Positioning accuracy:±1mm for initial placement
Fine Adjustment
Adjust with precision leveling feet(micrometer-grade)
Final levelness:≤0.01mm/m(Grade AA standard)
2.On-Site Grinding&Calibration
Equipment Used
Planetary grinding machine(e.g.,GMTK-300)with diamond abrasive wheels(grit#200-#3000)
Electronic level(0.001mm/m resolution)+laser interferometer(for ultra-precision validation)
Grinding Steps
Rough grinding:Remove 0.1-0.3mm with#200-#400 grit(flatness improvement)
Fine grinding:#800-#1500 grit for Ra 0.4-0.8μm surface finish
Polishing:#3000 grit+oxide slurry for Ra≤0.1μm(optical-grade finish)
Quality Validation
Flatness testing:Diagonal measurement with autocollimator(≤3μm/m)
Surface roughness:Contact profilometer(Perthometer)verification
3.Key Technical Considerations
Thermal Stability
Maintain workshop at 20±1°C during grinding to prevent thermal distortion
Granite’s CTE:4.5×10⁻⁶/°C–requires temperature-controlled environment
Stress Relief
Post-installation 48-hour stabilization before final calibration
Vibration isolation pads(40-60 Shore hardness)for long-term stability
4.Industry Applications
Metrology Labs:Coordinate measuring machine(CMM)bases(ISO 8512-3 compliant)
Semiconductor:Lithography machine foundations(≤0.005mm/m vibration tolerance)
Precision Engineering:Optical assembly platforms(λ/20 flatness for laser systems)
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