Slipline field modeling of orthogonal machining for a worn tool with elastic effects and adhesion friction at the contact regions

✍ Scribed by S.T. Dundur; N.S. Das

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 841 KB
• Volume: 209
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2008.01.022

✦ Synopsis

In this paper, two slipline field models are presented for orthogonal machining with a worn tool with a finite flank wear land. Friction at tool-chip and tool-work piece interfaces are assumed to be governed by the adhesion friction law as suggested by [Maekawa, K., Kitagawa, T., Childs, T.H.C., 1997. Friction characteristics at chip-tool interface in steel machining. 23rd Leeds Lyon Symposium in Tribology] It is further assumed that the natural contact length consists of a zone of elastic contact and a zone of plastic contact such that the forces in the elastic contact region and those at the rigid-plastic chip boundary keep the chip in a state of static equilibrium. The relation between the angular range of ˛and ˇ-lines within the secondary shear zone is assumed to be given by the linear equation ˇ= m 0 ˛. The fields are analyzed by the matrix operational procedure developed by A matrix methods for constructing slipline field solutions to a class of plain strain plasticity