The Departement of Mechanical Engineering, KU Leuven, Belgia mencari kandidat S3 untuk melakukan riset dibidang teknik dengan tema “Process Window Enhancement for Laser Cutting by Advanced Melt Removal Mechanisms”. Proyek ini di danai oleh GOA Project, dan akan berlangsung selama empat tahun.
- S2 bidang Teknik
- Menguasai CAD/CAM/CNC
- Mempunyai ketertarikan pada aplikasi laser
Deadline : 24 Desember 2009
Promotor: Joost Duflou
Background: Large constructions, like open sea support structures for wind turbines, require the processing of ever thicker steel plates. Today high tech cutting capabilities, as offered by high power laser systems, are limited by the material behavior of thick plates under cutting conditions. Indeed, fine grained steels are typically cut with O2 as an assist gas, which induces extra energy into the process by means of the exothermic oxidation reaction between gas and material. This reaction needs to be controlled by means of the gas supply pressure, which limits the expulsion force that can be exerted on the cutting front. For thicker plates the capillary forces tend to exceed the expulsion forces. Conclusion is that the O2 supported laser cutting as used today is characterized by a poorly configured process design with insufficient degrees of freedom to effectively shift the process boundaries.
The process – material interaction can in our opinion be improved by process redesign measures that affect the melt pool force balance. Innovative ideas have been formulated for this purpose (confidential due to IP protection considerations) and will be investigated in the proposed research. Ideally this process redesign will allow shifting the process limits to considerably thicker plates (targets are plates of 30 mm and more).
This research will cover an experimental exploration of the proposed process redesign concepts and should lead to a profound understanding of the effects caused to the cutting front melt pool.
Available means: extensive experience with conventional, CO2 laser based sheet metal cutting and experimental manufacturing process development, support by a team of process engineers and material scientists investigating the material-process interaction in different laser based manufacturing processes, in-process optical monitoring system with IR camera, financial means to invest in an experimental setup, industrial partners contributing to the development of experimental systems, well-equipped metrology laboratory, extensive materials laboratory facilities.
Profile: Motivated PhD candidate holding a master in engineering degree, with strong affinity for experimental work on a CAD/CAM/CNC platform, solid capabilities for experimental design, data analysis and model extraction, and a strong interest in laser applications.
Contact: Prof. Joost Duflou, Joost.Duflou@mech.kuleuven.be, ++32/16/322845
Prof. Jean-Pierre Kruth, Jean-Pierre.Kruth@mech.kuleuven.be
Latest Application date: 2009-12-24
Type of Position: scholarship
Source of Funding: GOA project
Duration of the Project : 4 years
Research group: Department of Mechanical Engineering
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