Рубрика: Handbook of Machining with Grinding Wheels

. VIBRATION STABILITY

19.12.1 Definitions The following definitions are helpful in making distinctions between different types of vibrations that may be experienced in centerless grinding. 19.12.1.1 Marginal Stability Marginal stability is where waviness neither builds up nor decays as grinding proceeds without direct excitation of the marginally stable frequency. In practice, a linear system excited at a frequency […]

ULTRASONIC TECHNOLOGY AND PROCESS VARIANTS

Elastomechanical ultrasonic vibration is generated by the transformation of electric energy in piezoceramic or magnetostrictive sonic converters. A voltage generator converts a low-frequency mains voltage into a high-frequency alternating-current voltage. The generated longitudinal vibra­tions are periodic elastic deformations of the mechanical vibration system in the micrometer range at supersonic frequencies, that is, higher than f […]