Numerical analysis of deformation and surface generation in ultraprecision machining [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 15 pages : digital, PDF file
Additional Creators:: Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Approximate solutions from classical plasticity have in the past been used to describe the process of orthogonal machining. Recently, numerical methods using more complex constitutive models have provided more accurate data on the state of deformation near the tool tip and the generated new surface in a conventional machining process. In this study we have used a viscoplastic material model and an efficient finite element approach to examine the process of orthogonal ultraprecision machining. In contrast to previous numerical studies the cutting thickness to tool tip radius ratio is finite, which requires the use of highly refined finite clement meshes to produce accurate solutions. Results are presented showing the effects of tool edge geometry, material constants, the coefficient of friction, and depth of cut. The numerical results are compared with ultraprecision machining experiments on fine grain copper where thrust and cutting forces and the damaged region around the tool tip (whose profile was characterized by atomic force microscopy) were carefully measured as a function of the uncut chip thickness.

Report Numbers:

E 1.99:la-ur--95-2844
E 1.99: conf-951135--18
conf-951135--18
la-ur--95-2844

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Note:

Published through SciTech Connect.
09/01/1995.
"la-ur--95-2844"
" conf-951135--18"
"DE96000014"
1995 International mechanical engineering congress and exhibition, San Francisco, CA (United States), 12-17 Nov 1995.
Anderson, C.A.; Stevens, R.R.; Rhorer, R.L.

Funding Information:

W-7405-ENG-36

View MARC record | catkey: 14113458