  The curved uncut chip thickness model is presented to predict the cutting
forces for general uncut chip geometries. The cutting force is assumed to be
distributed along a curved path on the rake face of the cutting tool, which
makes the solution computable for inserts with nose radius and more complex
cutting edge geometries. The curved paths originate from a basic mechanical
model (a compressed plate model), which is used to mimic the motion of the chip
on the rake face of the tool without performing real cutting simulations.
Consequently, actual cutting forces are predicted using orthogonal cutting data
and the orthogonal-to-oblique transformations. The solution satisfies the
classical observations and assumptions made on the chip formation process, it
is mathematically unique, free of inconsistency and computationally effective.
Case studies are presented on real cutting tests. The results highlight that
cutting force components can be sensitive to modeling assumptions in case of
extreme machining parameters.
