Abstract
This paper presents a new predictive model for the tool-chip interface friction and the chip groove effects in machining with restricted contact grooved tools. This model is derived from the recently established universal slip-line model for machining with restricted contact tools. Four important machining parameters including cutting forces, chip thickness ratio, chip back-flow angle, and chip up-curl radius are predicted in this model on the basis of (1) the rigid-plastic universal slip-line model, (2) a maximum value principle for determining the stress state of the plastic region in machining processes, (3) Dewhurst and Collins' matrix technique for numerically solving slip-line problems, and (4) numerical algorithms for solving non-linear equations. An analysis of the effect of tool geometry parameters, e.g., groove width and backwall height, on machining parameters is presented in this paper. A new methodology for predicting the actual tool-chip friction is also developed and presented in the paper with a case study demonstrating a unique solution. This methodology gives a range of solutions for combinations of tool geometry parameters.
Original language | English |
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Pages (from-to) | 469-476 |
Number of pages | 8 |
Journal | Key Engineering Materials |
Volume | 233-236 |
Issue number | II |
State | Published - 2002 |
Event | Proceedings of the 6th Asia-Pacific Symposium on Engineering Plasticity and Its Applications (AEPA2002) - Sydney, NSW, Australia Duration: Dec 2 2002 → Dec 6 2002 |
Keywords
- Chip-groove effects
- Machining
- Restricted contact grooved tools
- Tool-chip interface friction
- Universal slip-line model
ASJC Scopus subject areas
- Materials Science (all)
- Mechanics of Materials
- Mechanical Engineering