Friction effects between ultrasonic cutting blade and sheet stack

Ultrasonic vibration assisted machining is known to reduce friction forces for various processes and materials. In this paper, the friction forces between an asymmetrical cutting blade and sheet stack for different cutting velocities are investigated. Materials used for the sheets are plain label paper and polyethylene terephthalate. The cutting blade operates at a resonant longitudinal mode, resulting in a discontinuous relative movement between blade surface and stack. Along the normal vector of the cutting edge, the friction force reduction changes with the amplitude of the longitudinal mode of the blade. It is shown that for low cutting velocities no friction force is visible, and at higher cutting velocities friction increases.