Acoustic emission helps control grinding

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Published date:
Publication ID: EVOL_2000_E1_EN_1
Author: Erik Hellstrom
Format: PDF
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Acoustic emission helps control grinding

Acoustic emission is a technique that can be applied to monitor and control grinding-one of the key processes in the manufacture of bearings and shafts. Researchers at Lidkoping Machine Tools, part of SKF, have developed the technology in response to ever greater demands for high quality and closer tolerance components. Elastic waves produced by microscopic deformation that occurs in materials as they are stressed holds the secret to using acoustic emissions. These waves are the result of the rapid release of strain energy within a material due to internal structural changes during grinding. Eventually the waves reach the surface of the material and can be detected by sensor. Suitable measurement and interpretation methods can extract information about what is happening at the grinding face and indicate how to control the process more accurately.

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