Advanced Turning

When tools cut a workpiece and generate chips, the workpiece is subjected to large plastic deformation. At this time, some of the force necessary for this plastic deformation is directed through the tool. This force is known as cutting resistance. Cutting resistance not only causes deformation of the workpiece and tool holders, but is also important in deciding such factors as the cutting power required, the workpiece holding method and the machining procedure.



What is cutting resistance?


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Depth of cut (h)

Cross section of cut

Cutting edge


Chip thickness (hc)

The figure shows the relationship between the cutting edge and the workpiece. Plastic deformation of the chip is induced mainly from the cutting edge to the machined surface in the direction of an angle φ. This is called the shear angle.