Effect of Shape Parameters on the Modal Properties of Stepped Ultrasonic Concentrator

Abstract

mproving of cutting process is one of the most important requirements that are expected from the machining methods in the recent years. In some machining processes, the positive effect of ultrasonic waves to improve the cutting process is used. The cutting process efficiency depends on the structure of excitation system which generates ultrasonic waves. One of the most important elements of this system is the ultrasonic waveguide. The role of waveguide is the transfer of ultrasonic vibration energy from ultrasonic transducer to the tool cutting edge interacting with the workpiece (ultrasonic assisted machining-UAM). The UAM system performance depends on well-designed ultrasonic waveguide. The most important aspects of waveguide design are a resonant frequency, amplification factor and the determination of waveguide resonant wavelength - usually integer multiple of half wavelength. The effect of geometrical parameters of stepped waveguide on dynamical properties is presented in this paper.

The contribution to the modal analysis of the control system

“…Designated natural frequencies are then confronted with the results from practice by using computer modal analysis. This procedure can be considered the initial step for verifying the hypothesis about creating resonance in the system at its natural frequency [10].…”

Optimizing Vibration Performance of a Novel Ultrasonic Dental Drill

“…The structures of working tip and ultrasonic horn play an important role in the performance parameters such as natural frequency and the vibration nodes, combination resonances, frequency shifts. It has attracts huge research attention on designing a structure meeting the performance requirements of the ultrasonic machining system in the past years [9][10][11][12][13]. For instance, Milan analyzed the mode of ultrasonic horn's dynamic properties on different section shapes and provided an effective tool for selection of suitable ultrasonic horn shape with required properties [11].…”

“…It has attracts huge research attention on designing a structure meeting the performance requirements of the ultrasonic machining system in the past years [9][10][11][12][13]. For instance, Milan analyzed the mode of ultrasonic horn's dynamic properties on different section shapes and provided an effective tool for selection of suitable ultrasonic horn shape with required properties [11]. Wang developed a new horn for high displacement amplification based on cubic Bézier curve, finite element analyses was carried out to evaluate the mechanical behaviors of the horns [12].…”