Definition of the Cutting Tests III

The incorporation of macroscopic fragments from the workpiece material to the tool surface occurs because of work material adhesion on the tool rake face in two different mechanically unstable forms:

• Built-Up Edge (BUE)
• Built-Up Layer (BUL)

The existence of these small amounts of material that are going to partially or totally adhere to the tool rake face during the machining process can disturb the AE signal detection during the tests and can be removed from the tool surface by the action of the cutting forces