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← TechnologyWhich distortion develops in a long, slender workpiece under heavy cutting forces within a CNC lathe?
A)Torsional resonance vibration
B)Chatter-induced surface waviness
C)Thermally-induced axial expansion
D)Buckling-related bending deflection✓
💡 Explanation
Buckling manifests because the axial cutting force exceeds the workpiece's critical load; therefore, bending deflection increases significantly rather than torsional vibrations, which are due to speed variations.
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