Acoustic emission monitoring

Details Acoustic emission monitoring Acoustic emission monitoring

1983-04-04

1985-02-19

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

72 10, 72 19, 73801, G01N 2900, B21D 310

Patent

active

044997698

ABSTRACT:
Acoustic emission monitoring is a non-destructive testing technique that ects ultra-high frequency sound that stressed metal emits. In straightening a gun tube the workpiece is at first under no stress, is elastically deformed (with total springback when pressure is released), is plastically deformed (with some springback upon release of pressure), or it cracks under too great a pressure. Each of these stages produces a distinctly different type of acoustic emission. By listening to the workpiece during the pressing operation the operator can be alerted as to the stage the workpiece is in and he can adjust his operation accordingly.

REFERENCES:
patent: 3713312 (1973-01-01), Galdabini
patent: 3911734 (1975-10-01), Mehdizadeh
patent: 4430896 (1984-02-01), Fujimori et al.
patent: 4433582 (1984-02-01), Joosten

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