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  • 1.
    Andersson, Lars
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Berglund, Marcus
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Camera Based Concept for Enhancement of IRB Accuracy using Fixed Features and SLAM2006In: 8th Biennal ASME Conference on Engineering Systems Design and Analysis,2006, Torino: ESDA , 2006Conference paper (Refereed)
    Abstract [en]

    A standard IRB (Industrial Robot) of today is not capable of positioning itsels to within better than 2-5mm relative to a given structure or object. In order to be able to perform high precision manufacturing, the requirement is less than 0,5mm. Existing solutions for 6DOF measurements to enhance the accuracy are not only expensive but also lacks flexibility. An affordable, accurate concept for IRB closed loop position feedback is presented here. This article proposes a method for using a camera together with fixed features to enhance the accuracy of an IRB in industrial manufacturing processes. The method is based on SLAM (Simultaneous Localization and Mapping), used to structure collected information about the features (mapping), and for the IRB to locate itself among the features (localization). The concept covers a scenario in which a set of features are placed within the working area. A camera is mounted on the IRB to observe (measure) the relative pose of the feature set. When the system is running observation of only one feature increases accuracy. However, in normal operation more features are observed which will increase accuracy further. The system setup is a standard IRB, ABB4400, on which a single camera with IR flash is mounted and used as sensor. The features are made out of reflectors that are placed in the production cell. The camera is also equipped with an IRfilter to improve the signal to noise ratio, simplifying image processing and accelerating execution. The execution time is critical since the goal is to sample at such rate that as to cover the dynamics of the robot. 

  • 2.
    Andersson, Nils-Eric
    et al.
    Linköping University, Department of Mechanical Engineering, Engineering Materials. Linköping University, The Institute of Technology.
    Johansson, Sten
    Linköping University, Department of Mechanical Engineering, Engineering Materials. Linköping University, The Institute of Technology.
    Björklund, Stefan
    Linköping University, Department of Mechanical Engineering, Production Engineering. Linköping University, The Institute of Technology.
    Face milling of AA7010 at high cutting speedsManuscript (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.

  • 3.
    Bjurstam, Peter
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Software Routines for Milling Operations2001In: Konf. PEDAC 2001 Alexiandria,2001, 2001Conference paper (Other academic)
  • 4.
    Bjurstam, Peter
    Linköping University, Department of Mechanical Engineering, Production Engineering.
    Software Routines for Milling Operations2000In: PEDAC 2001,2000, 2000Conference paper (Other academic)
  • 5.
    Bjurstam, Peter
    et al.
    Linköping University, Department of Mechanical Engineering, Production Engineering.
    Björklund, Stefan
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Novak, Arne
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Determination of Maerial Parameters for Cutting Data Calculations in Milling2001In: Conference on Production Research, ICPR-16,2001, 2001Conference paper (Other academic)
  • 6.
    Björklund, Stefan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Yamani, Naresh
    Rationala AB.
    Loyd, Tomas
    Rationalia AB.
    Simulation Software for Real Time Forecasting as an Operational Support2004In: Second World Conference on POM and 15th Annual POM,2004, 2004Conference paper (Other academic)
  • 7.
    Johansson, Glenn
    Linköping University, Department of Mechanical Engineering, Production Engineering. Linköping University, The Institute of Technology. Univ.,.
    Environmental performance requirements in product development: an exploratory study of two development projects2001Doctoral thesis, monograph (Other academic)
    Abstract [en]

    In recent years, Ecodesign has attracted increased attention from researchers. In this thesis, the term Ecodesign refers to the actions taken and activities carried out originating from the incorporation of environmental performance requirements in a product development project. Earlier Ecodesign research has primarily focused on the development of various tools for supporting practitioners. Only a few studies have focused on how the incorporation of environmental performance requirements affects development projects and the changes that a development organisation undergoes to become more environmentally conscious. The objective of this thesis is therefore to explore characteristics of product development projects originating from the incorporation of environmental performance requirements.

    The empirical material has been collected from two in-depth case studies of product development projects in which new and complex business-to-business products were developed. The first case study addressed a project in which a telecommunications product was developed. The study occupied approximately 1 ½ years and was performed as a real-time, longitudinal study. The second case study was performed as an ex-post study and addressed a product development project in which a new power generating gas turbine was developed.

    The analysis, which takes as its starting point a number of essential product development elements derived from the literature, revealed a number of differences between the projects. These differences seem largely to

    be due to different levels of Ecodesign experience in the development organisations carrying out each project. When relating the development organisations' level of Ecodesign experience to a three-phase model of the

    Ecodesign integration process presented in earlier research, it was found that one of the organisations fitted into the model, whereas the other did not. On the basis of this finding, a fourth Ecodesign integration phase was detected and denoted the Innovative Ecodesign phase. Complementing the existing model with this new phase, the so-called Extended Ecodesign Integration model was developed. The model shows that the focus in development projects carried out within development organisations in the first three phases of Ecodesign seems to be set on the environment and integration of Ecodesign in the development process. Development organisations that have reached the Innovative Ecodesign phase tend to direct efforts in the projects mainly

    towards the application of new technology and technical problem solving in order to fulfil the environmental

    performance requirements.

  • 8.
    Lenner, Matz
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Better Workmanship Reduces Hazardous Cutting1999In: IWMS14,1999, 1999Conference paper (Other academic)
  • 9.
    Lenner, Matz
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    High Speed Machining - Need Better Skilled Operators2001In: IMC-18,2001, 2001Conference paper (Refereed)
  • 10.
    Lenner, Matz
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Andersson, Jan -Erik
    In-Process controlled robots can improve quality2000Other (Other (popular science, discussion, etc.))
    Abstract [en]

      

  • 11.
    Lenner, Matz
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Björklund, Stefan
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    High Speed Machining2001In: The 5th Intl Conference on Modern Technologies in Manufacturing,2001, 2001Conference paper (Other academic)
  • 12.
    Novak, Arne
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Adaptive Control - Problems Solved to be Solved and New Feataures2001In: 2nd intl conf on Advanced Manufacturing Technology,2000, 2001Conference paper (Other academic)
  • 13.
    Novak, Arne
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Adaptive Control - Problems Solved, to e solved and New Features to Develop2000In: Proceedings of the Second Intl Conf. on Advanced Manufacturing Technology,2000, 2000Conference paper (Other academic)
  • 14.
    Novak, Arne
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Production Engineering.
    Trends, reality and future possibilities in manufacturing2002In: TMCE2002 - Tools and methods of competitive engineering,2002, 2002Conference paper (Other academic)
1 - 14 of 14
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