A review of the application of acoustic emission techniques for monitoring forming and grinding processes

Application of acoustic emission technique (AET) for on-line monitoring of various forming processes such as punch stretching, drawing, blanking, forging, machining and grinding has been reviewed and discussed in this paper. Acoustic emission (AE) generated during the forming processes gives useful information for detecting die wear and cracking, friction properties, state of lubrication, galling, stick-slip, etc. AE monitoring of open die and closed die forging of Al alloys has shown that AET can be used to monitor industrial forging processes.