In this study, a novel incremental ring rolling process used in production of rings
with various cross sections is examined. A basic type of this process is
investigated numerically, using commercial finite element programs / MSC
Superform, MSC Marc. The user defined subroutines are also utilized for
flexibility in modeling. The aim of modeling is to determine the material flow for
geometrical analysis, strain/stress distribution for tool force analysis and residual
stresses, in a cost effective way. The process has instabilities and requires large
number of incremental stages to complete a full finite element simulation. The full
models are reliable but costly hence the numerical studies are focused on reliable
simplified models with lower computation time. Different approaches are
developed: three-dimensional segment model, improved segment model, velocity
coupling model. The results of these models are compared with experimentally
verified full models. Numerical parameters such as mesh type, step size,
convergence ratio are examined. After verification of the model different
applications to of the process is developed and physical parameters affecting the
process are discussed / such as the tool path .
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12607911/index.pdf |
| Date | 01 December 2006 |
| Creators | Oztop, Muin Suleyman |
| Contributors | Dursunkaya, Zafer |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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