Forging operations are widely used for manufacturing processes. Forging
process is done hot, warm or cold. All three temperature ranges have advantages
and disadvantages. The aim of this study is to combine the advantages of hot
and cold forging in a flange forming process with cylindirical workpieces in a
single step. The process idea is the partial heating of the workpiece at locations
where large deformations occur and to keep the parts of the workpiece cold at
regions where high precision forming is required. Firstly, the process idea has
been investigated virtually by the finite element method supplying the
theoretical verification of the feasibility of the novel process. By this analysis
also the process limits have been estimated. All analysis are based on an elastoplastic
large strain material law with thermomechanical coupling. The
experimental part of the study served to realize the new process idea and to
verify the process window. In the experimental study two different materials,
three different part geometries and different initial conditions such as
temperature field, lubrication etc. have been investigated. The specifimens are
heated by induction.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/4/1095405/index.pdf |
| Date | 01 January 2003 |
| Creators | Kayaturk, Kursad |
| Contributors | Tekkaya, Erman A. |
| 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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