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Optical glass fabrication technology. 2: Relationship between surface roughness and subsurface damage
Applied Optics
|June 5, 2010
Summary
For glass grinding, surface roughness directly predicts subsurface damage depth. This finding is crucial for optimizing polishing and grinding processes by estimating the necessary material removal.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Surface Engineering
Background:
- Fracture is a primary mechanism in glass grinding.
- Understanding the relationship between surface roughness and subsurface damage is critical for process control.
Purpose of the Study:
- To investigate the relationship between surface roughness and subsurface damage depth in glass grinding.
- To determine the ratio of subsurface damage to surface roughness under specific grinding conditions.
Main Methods:
- Experimental glass grinding using bound diamond abrasives.
- Measurement of surface roughness depths.
- Measurement of subsurface damage depths.
Main Results:
- A consistent ratio was found between subsurface damage depth and surface roughness for bound diamond abrasive grinding (6.2-6.4).
- This ratio is higher than that reported for loose abrasive grinding (3.7-4.0).
Conclusions:
- Surface roughness is a reliable indicator of subsurface damage depth in glass grinding.
- This relationship allows for accurate estimation of the damage layer thickness, guiding subsequent polishing or grinding operations.
