Effects of Tool Wear on the Surface Texture in Turning: A Feature Characterization Approach Based on ISO 21920-2
Reading tool wear from the fingerprints it leaves on metal surfaces
When cutting tools wear down during machining, they leave telltale marks on the metal surface being cut. Researchers found that a single measurement of the groove pattern — specifically how steeply the worn cutting edge rises — captures 83–90% of the information needed to track tool wear throughout its entire life, making it possible to estimate wear from surface texture alone.
Manufacturers currently have to stop production and inspect tools directly to know when they're wearing out and need replacing. A reliable way to estimate wear from the surface pattern of finished parts could let factories monitor tool condition automatically using simple optical sensors, reducing downtime and preventing defective parts before they're made.