Nonlinear Dynamics and Chaos for High Volume and Ultra Precision Metal Cutting
September 20, 2004 — September 24, 2004
- Marian Wiercigroch (Univ. of Aberdeen, Aberdeen, Great Britain)
Machining (in particular, metal cutting) is still the fundamental manufacturing technique and it is expected to remain so for the next few decades. Moreover, it is predicted that ultra-precision machining will take an even more significant role among other manufacturing techniques. According to the International Institution for Production Research (CIRP), machining accounts for approximately half of all manufacturing techniques, which is a reflection of the achieved accuracy, productivity, reliability and energy consumption of this technique. While considering the automated manufacturing centres, manufacturing flexibility brings an additional important advantage.
In the search for a significant improvement in accuracy and productivity of machining processes, the mechanics of chip formation has been revisited in order to understand functional relationships between the process and the technological parameters. This has led to the necessity of considering the chip-formation process to be highly nonlinear with complex interrelations between its dynamics and thermodynamics. The understanding of these relations will be reflected in the design of new machine tools, not necessarily heavier and stiffer, accommodating the needs of the current competition race for more accurate, productive and cheaper technologies. However, the major requirement is to perform the technological operation under chatter-free conditions, which can guarantee achieving the required geometry and surface finish of the machined parts.
The proposed course is designed to provide (i) background in the mechanics of metal cutting integrated with the nonlinear dynamic approach to model and analyse physical phenomena occurring during chip formation (ii) an overview of the state-of-the-art of various machining methods for high volume and ultra precision machining. Various chatter mechanisms will be examined in detail and practical solutions of chatter avoidance and suppression will be discussed.
The course is addressed to postgraduate and postdoctoral researchers working in academia and/or industry (e.g. RD departments, technology design units, software development companies) investigating in the areas such as mechanics, nonlinear dynamics and physics, who are involved or interested in developing of new more effective machining processes and optimisation of the existing ones.