Event Details

Design of a Piezoelectric Tool for Active Control of Cutting Forces in Machining

Presenter: Mr. Nikolay Tzonev - Department of Mechanical Engineering
Supervisor:

Date: Wed, January 23, 2002
Time: 14:00:00 - 15:00:00
Place: EOW 230

ABSTRACT

ABSTRACT

The control of structural vibrations in machining is essential for realizing smooth-operating machines and reducing the acoustic noise generated by powered mechanical devices. Chatter vibrations are a problem associated with most machining practices. If left unattended, machine chatter can render a workpiece useless in a short period of time, resulting in loss of expensive time and materials. The nature of chatter vibrations in machining is associated with random self-excitation mechanisms in the chip generation process of metal removing. Until recently, the only method of offsetting these undesired effects was the utilization of conventional passive damping components.

The recent advances in microelectronics and piezoelectric sensing and actuating have opened the possibility of designing active-control devices for counteracting mechanical vibrations. Piezoelectric actuators and transducers are common industrial devices used to generate and measure mechanical vibrations. Conversely, they are very suited for integration with passive and active electronic components to form systems that actively suppress mechanical vibrations. Such devices interact with the surrounding environment to achieve desired control.

This presentation introduces the machine chatter suppression research done at the Advanced Control and Instrumentation Laboratory of the Department of Mechanical Engineering of the University of Victoria. The ultimate goal of the research is to develop a novel piezo-driven tool holder capable of actively suppressing chatter vibrations in machining. To prevent the negative effects of the large, unpredictable, and non-linear fluctuating chatter forces, a 1-DOF piezoelectric-actuated device has been designed and implemented.

FREE AND OPEN TO THE PUBLIC

Coffee and Cookies Will be Provided

For Further Information Please Contact: Nik Tzonev (361-1681)