A typical boring bar is a metal cutting tool with large overhang ratio, due to which it is characterized by low dynamic stiffness. Therefore, during cutting process, it is susceptible to cutting instability, known as machine tool chatter. In this ptaper, the use of an active dynamic absorber to actively control machine tool chatter in a boring bar is studied. An active dynamic absorber is designed such that it can be easily assembled with a commercially available steel boring bar. A piezoelectric pusher is used as the actuator for the active dynamic absorber. The dynamic equations of the boring bar with active dynamic absorber are calculated from experimentally obtained frequency response functions of the system. Optimal control theory is applied to the dynamic equations to calculate state variable feedback parameters. The state variable feedback is implemented using a Digital Signal Processing (DSP) chip. Cutting tests were performed with this setup for different cutting conditions, and for different overhangs of the boring bar. Stable cutting operations were performed using the boring bar with active dynamic absorber, for length to diameter (L/D) ratio upto 9.
|Title of host publication||14th Biennial Conference on Mechanical Vibration and Noise|
|Subtitle of host publication||Vibration and Control of Mechanical Systems|
|Number of pages||13|
|State||Published - 1993|
|Event||ASME 1993 Design Technical Conferences, DETC 1993 - Albuquerque, United States|
Duration: Sep 19 1993 → Sep 22 1993
|Name||Proceedings of the ASME Design Engineering Technical Conference|
|Conference||ASME 1993 Design Technical Conferences, DETC 1993|
|Period||9/19/93 → 9/22/93|
Bibliographical noteFunding Information:
Acknowledgement This research has been performed with the support of Kennametal Inc. at Latrobe, Pennsylvania, and Center for Robotics and Manufacturing Systems at University of Kentucky. We are thankftil for all the help and support given by Mr. David Siddle, and Mr. John VanKirk of Keimametal, Inc..
© 1993 American Society of Mechanical Engineers (ASME). All rights reserved.
ASJC Scopus subject areas
- Mechanical Engineering
- Computer Graphics and Computer-Aided Design
- Computer Science Applications
- Modeling and Simulation