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Surface roughness measurement. How to measure roughness of a surface, buy a roughness tester from the manufacturer.
The measurement of micro-geometric characteristics of the workpiece’s machined surface in length metrology technology. Commonly used measurement methods include comparison method, stylus method, light section method and interference method. The comparison method compares the surface roughness comparison sample block (referred to as the sample block, Figure 1) with the measured surface based on vision and touch, to determine which value the measured surface roughness is equivalent to, or to measure the change in reflected light intensity to evaluate the surface roughness. degree (see laser length measurement technology).
The sample block is a set of metal blocks with a flat or cylindrical surface. The surface has different surface roughness after grinding, turning, boring, milling, planing and other cutting processes, electroforming or other casting processes. Sometimes the sample can be directly selected from the workpiece and used as a sample block after being measured and qualified. Although the method of using sample blocks to evaluate surface roughness based on vision and touch is simple, it is affected by subjective factors and often cannot obtain correct surface roughness values. How to measure roughness of a surface, buy a roughness tester from the manufacturer.
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