Approaches for chatter reduction in deep cavity and intricate surface milling
Name
43033303-MIT.pdf
Description
Full printable version
Size
15.74 MB
Format
Adobe PDF
Checksum (MD5)
1f6d0679bf83d3bb385dc097a3c007fc
Author(s)
Rohatgi, Gaurav
Advisor(s)
Alexander Slocum.
Date Issued
1998
Publisher
Massachusetts Institute of Technology
Abstract
The goal of the project was to increase the metal removal rate or improve the surface quality of an intricate surface cut by a long overhang tool. The results of the metal cutting tests show that the surface quality of a finish cut at conventional milling speeds can be improved by approximately 50% by using a stepped or tapered tool. In applications with straight walls or intricate surfaces where the larger diameter base of the tool interferes with the workpiece, a high stiffness 5 axis machine can achieve the desired geometry. Damping treatments such as the squeeze film damped tool and the viscoelastic ring were developed that could significantly increase the dynamic stiffness of a long overhang tool. These damping treatments did not improve the workpiece surface finish at conventional milling speeds. However, metal cutting theory indicates that more damping could be beneficial in high speed milling applications in which the vibration amplitude of the tool's resonant cantilever mode limits the stable depth of cut. This study has also produced an analytic model and damping methods that will enable designers to tailor the dynamic response of a tool to attenuate the vibrations that cause chatter at higher spindle speeds.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
Includes bibliographical references (leaf 119).
Subjects
Mechanical Engineering
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
M.I.T. theses are protected by
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
Persistent DSpace Link
