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Turnmilling
Kinematics
Turnmilling, a process where a milling cutter 1 The relation between tool rotation,
machines a rotating workpiece, combines workpiece rotation and the pitch
milling and turning techniques and has many
advantages. Multitasking machine In turnmilling, the tool follows a spiral path (like
tools make this beneficial method more and in turning) with a predefined pitch. The pitch is
more popular and offer an inviting prospect practically the width of cut (ae) of the cutter and
for the manufacturer. for high performance the recommended values for
Machining of non-continuous surfaces or ae are (0.7…0.8)·Dt. The pitch should not exceed
eccentric areas of rotary bodies, machining the cutters diameter, this will result in a spiral
rotating heavy-weight parts or materials that protrusion along the workpiece.
generate long chips - here turnmilling can
significantly improve performance and solve During a single rotation of the workpiece, the tool
various production problems. A practical translates a pitch distance along the workpiece
question that rises while dealing with axis with an F table velocity.
turnmilling is: how to calculate cutting
data during this process? The time that is required for the workpiece to
1
make a single rotation is t= [min]
n
Recall also that, w
Pitch=Ftable t and Ftable=z f n .
*
* z* t
Turnmilling A Scheme of Turnmilling Movements
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