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Björklund, Stefan
Publications (7 of 7) Show all publications
Björklund, S., Yamani, N. & Loyd, T. (2004). Simulation Software for Real Time Forecasting as an Operational Support. In: Second World Conference on POM and 15th Annual POM,2004.
Open this publication in new window or tab >>Simulation Software for Real Time Forecasting as an Operational Support
2004 (English)In: Second World Conference on POM and 15th Annual POM,2004, 2004Conference paper, Published paper (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-22544 (URN)1807 (Local ID)1807 (Archive number)1807 (OAI)
Available from: 2009-10-07 Created: 2009-10-07
Johansen, K. & Björklund, S. (2003). Methods for cooperative product development in extended enterprises. In: Proceedings of the Euroma/POMS Conference, June 16-18, Como, Italy: .
Open this publication in new window or tab >>Methods for cooperative product development in extended enterprises
2003 (English)In: Proceedings of the Euroma/POMS Conference, June 16-18, Como, Italy, 2003Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14113 (URN)
Available from: 2006-11-01 Created: 2006-11-01 Last updated: 2016-09-26
Johansen, K. & Björklund, S. (2003). Product realization through concurrent engineering within extended enterprises: A case study. In: Proceedings of the 10th ISPE International Conference on Concurrent Engineering: Research and Applications, July 26-30, Madeira, Portugal: .
Open this publication in new window or tab >>Product realization through concurrent engineering within extended enterprises: A case study
2003 (English)In: Proceedings of the 10th ISPE International Conference on Concurrent Engineering: Research and Applications, July 26-30, Madeira, Portugal, 2003Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14114 (URN)
Available from: 2006-11-01 Created: 2006-11-01 Last updated: 2016-09-26
Björklund, S., Bjurstam, P. & Novak, A. (2002). Compensation of systematic errors in five-axis high-speed machining. International Journal of Production Research, 40(15 SPEC.), 3765-3778
Open this publication in new window or tab >>Compensation of systematic errors in five-axis high-speed machining
2002 (English)In: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 40, no 15 SPEC., p. 3765-3778Article in journal (Refereed) Published
Abstract [en]

A method is described for the compensation of errors associated with tool path generation, particularly during five-axis high-speed machining (HSM). Information on machine tool performance and its dynamic features is used to calculate possible errors and convenient modifications of the NC program, thereby avoiding errors when parts are actually being machined. This 'preprocess method' by means of postprocessing with NC software is presented. The errors dealt with are mainly servo lag errors, but the explored approach can support most systematic errors associated with machine tool performance. These are briefly summarized. Research so far has largely been aimed at the implementation of compensation routines in the CNC controller and at corrections in real time. The problem is that most applications are only available for three-axis milling. The presented approach (compensation before machining by using software routines in a specially designed postprocessor) is based on a fuzzy logic expert system. The benefits can be summarized as data reduction, data improvement, precontrol of feed, and improved component accuracy. The applied procedure is also convenient for implementation in an industrial environment by retrofitting existing equipment. The suggested method provides improved control over machine dynamics, permitting high-speed machining centres to maintain a maximum or near-maximum feed rate despite axis reversals and tool path changes, even at corners. Two categories of results are presented, namely the management of NC data related to expected performance of the machine tool and improvements of the machine tool performance in terms of productivity and accuracy of the machined test components.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-46893 (URN)10.1080/00207540210136469 (DOI)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
Bjurstam, P., Björklund, S. & Novak, A. (2001). Determination of Maerial Parameters for Cutting Data Calculations in Milling. In: Conference on Production Research, ICPR-16,2001.
Open this publication in new window or tab >>Determination of Maerial Parameters for Cutting Data Calculations in Milling
2001 (English)In: Conference on Production Research, ICPR-16,2001, 2001Conference paper, Published paper (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-30014 (URN)15458 (Local ID)15458 (Archive number)15458 (OAI)
Available from: 2009-10-09 Created: 2009-10-09
Lenner, M. & Björklund, S. (2001). High Speed Machining. In: The 5th Intl Conference on Modern Technologies in Manufacturing,2001.
Open this publication in new window or tab >>High Speed Machining
2001 (English)In: The 5th Intl Conference on Modern Technologies in Manufacturing,2001, 2001Conference paper, Published paper (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-30015 (URN)15460 (Local ID)15460 (Archive number)15460 (OAI)
Available from: 2009-10-09 Created: 2009-10-09
Andersson, N.-E., Johansson, S. & Björklund, S.Face milling of AA7010 at high cutting speeds.
Open this publication in new window or tab >>Face milling of AA7010 at high cutting speeds
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Face milling using different commercial tools and inserts at varying cutting speeds on a high strength aluminium alloy has been performed. The surface integrity of the machined samples has been investigated in terms of surface roughness, residual stresses, hardness and peak broadening from x-ray diffraction at grazing angle incidence. Some fatigue testing of the machined surfaces has been done. The cutting chips from the different machining parameters are investigated and compared to one another. The results show a strong influence of tool insert on surface roughness, residual stress, peak broadening, and hardness profile and fatigue properties. The influence of cutting speed on the surface integrity is much smaller. The cutting speed does however influence the size and shape of the cutting chips. There is also a general decrease in peak broadening from x-ray diffraction very near the machined surface after high cutting speeds. This could be explained by a higher local heating of the work piece at very high cutting speeds.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-86822 (URN)
Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2013-01-07
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