The Arts et Métiers campus Arts et Métiers is pleased to invite you to the thesis defense ofAlireza Aliakbari, doctoral student at the Lispen laboratory, on March 1, 2023.
Title: Study and optimization of machining processes using passive damping devices
Summary of work:
Nowadays, the most important and critical objectives of all industrial units are mass production at a lower cost in terms of materials and resources, and the machining industry is no exception.
Vibration is one of the most harmful problems faced by the machining process, significantly affecting the quality of the final product. Vibrations in machine tools are the result of forces generated during the process. Over the last few decades, a lot of research has been done on this topic from different angles. Understanding, modeling, detection, suppression, etc. have recently been the focus of previous research, which has led to various methodologies for preventing chatter and vibrations in machine tools.
This project, entitled "Study and optimization of machining processes using passive damping devices," is a CIFRE (Industrial Agreement for Training through Research) doctoral contract. The proposal has been approved by the ANRT (National Association for Research and Technology) in collaboration with SECO and AMVALOR ( Arts et Métiers commercial branch).
This project brings together SECO R&D and the Lispen laboratory to increase the efficiency and productivity of the Steadyline product by conducting technical and scientific investigations into the dynamic behavior of the process using these devices. Steadyline is a family of anti-vibration tool holders known for minimizing or eliminating vibrations during all kinds of machining processes. The key principle of Steadyline is a tuned mass damper that attenuates tool holder vibrations, resulting in improved surface finish and increased productivity.
This type of solution, adopted by most tool holder manufacturers worldwide, is becoming popular among machinists, but feedback highlights certain drawbacks such as insufficient robustness and erratic efficiency.
The main objectives of this research are to analyze the current behavior of Steadyline, with and without the machining process, and to propose solutions to improve its efficiency and better mitigate chatter problems. These solutions are intended to feed into the industry and the market in a later phase of industrialization.
Jury:
- Vincent Gagnol, Senior Lecturer, SIGMA Clermont, rapporteur
- Mathieu Ritou, Senior Lecturer, Nantes University, rapporteur
- Philippe Lorong, Arts et Métiers professor, examiner
- Gilles Dessein, professor at the National Engineering School of Tarbes (ENIT), examiner
- Philippe Véron, Arts et Métiers professor, examiner
- George Moraru, Arts et Métiers lecturer, examiner
Practical information:
Location: Arts et Métiers Campus Arts et Métiers (room M001)
Time: 2:00 p.m.
