Almir Heralic
University College West
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Publication
Featured researches published by Almir Heralic.
IFAC Proceedings Volumes | 2008
Almir Heralic; Anna-Karin Christiansson; Kjell Hurtig; Mattias Ottosson; Bengt Lennartson
In this paper a novel approach towards automation of robotized laser metal-wire deposition (RLMwD) is described. The RLMwD technique is being developed at University West in cooperation with Swedis ...
conference on automation science and engineering | 2015
Petter Hagqvist; Anna-Karin Christiansson; Almir Heralic
This paper presents the benefits and challenges of using a standard robotised laser welding cell for additive manufacturing (AM). Additive manufacturing, sometimes denoted 3D-printing or rapid prototyping, has lately met strong interest in several areas of society, and a variety of technologies and materials have been in focus. The current paper summarises automation efforts for AM of advanced aero engine components using high power laser with welding optics as power source for melting metal wire and using an industrial robot for obtaining a 3-dimensional feature shape. The challenges are related to the process itself encountering high and repeated temperatures with melting and solidification of the metal as the main players. The major research solutions discussed in this paper are related to automation issues for obtaining a stable process and to have control of the temperatures and temperature changes that the metals encounter during the process. The solutions are successfully implemented in an industrial laser welding cell.
International Congress on Applications of Lasers & Electro-Optics | 2011
Almir Heralic; Anna-Karin Christiansson
This paper describes alasermetaldepositionsystem that isbasedon robotizedlaserwelding andwirefiller material. The system has been found suitable for the manufacture of simple but large shapes with high metallurgical requirements such as bosses or flanges found on aero engine components. Several benefits have been identified with the usage ofwirefiller compared to powderized feedstock, such as betterprocessefficiency, higherdepositionrates, and cleaner working environment. Thewirebaseddepositionprocessis however sensitive to disturbances and thus requires continuous monitoring and adjustments.Inthis work a 3D scanning system is described forautomaticin-processcontrolof thedeposition. The goal is to obtain a flat surface for each deposited layerinorder to ensure stabledeposition. The deviationsinthe layer height are compensated by controlling thewirefeed rate. The system is tested throughdepositionof small cylindrical bosses and the results show that the proposedcontrolapproach is suitable forautomaticdepositionof such structures. The material consideredinthis paper is Ti-6Al-4V deposited on plates of same material. The paper presents the equipment and thecontrolstrategy and discusses practical issues regarding thesensorused.
Optics and Lasers in Engineering | 2012
Almir Heralic; Anna-Karin Christiansson; Bengt Lennartson
Optics and Lasers in Engineering | 2010
Almir Heralic; Anna-Karin Christiansson; Mattias Ottosson; Bengt Lennartson
Mechatronics | 2015
Petter Hagqvist; Almir Heralic; Anna-Karin Christiansson; Bengt Lennartson
Optics and Lasers in Engineering | 2014
Petter Hagqvist; Almir Heralic; Anna-Karin Christiansson; Bengt Lennartson
Archive | 2008
Anna-Karin Christiansson; Fredrik Danielsson; Almir Heralic; Mattias Ottosson; Kjell Hurtig
World Conference on Titanium : 16/08/2015 - 20/08/2015 | 2015
Andreas Lundbäck; Robert Pederson; Magnus Hörnqvist Colliander; Craig A. Brice; Axel Steuwer; Almir Heralic; T. Buslaps; Lars-Erik Lindgren
international conference on control applications | 2007
Almir Heralic; Anna-Karin Christiansson; Mattias Ottosson; Kjell Hurtig; Bengt Lennartson