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METALWORKING EQUIPMENT AND TOOLS
cracks arising from the impact interaction of the cutting edge with the work piece material.
This forms the characteristic trace on the surface. When the contact between the tool and the
work piece is broken, the tip of the cutter performs complex spatial vibrations. As a result, the
coordinates of re-engagement are largely random, violating the geometry of the wake. When
considering the spatial trajectories of the tip of the cutting tool in the process of intense self-
oscillations, a change in the direction of the attractors was noted. If, during normal cutting, the
trajectories of the cutting tool are elongated in the direction of the cutting speed, then during
intense self-oscillations they are extended along the normal to the surface to be machined [17,
18]. The resulting impact interaction not only reduces the surface roughness, but also creates
instability in the properties of the surface layer of the part, and also intensifies the destruction
of the cutting blade of the tool.
a
b
Fig. 5. Examples of surfaces treated with intense self-oscillation: a - inner conical surface of a steel part after boring; b - a
view of the traces from the cutter on the cylindrical surface of the steel part.
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