| 1. |
- Aromaa, Susanna, et al.
(författare)
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Digital Tools to Support Knowledge Sharing and Cooperation in High-Investment Product-Services
- 2017
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Ingår i: Advances in Intelligent Systems and Computing. - Cham : Springer International Publishing. - 2194-5365 .- 2194-5357. ; 606:Advances in Ergonomics of Manufacturing: Managing the Enterprise of the Future, s. 235-246
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Konferensbidrag (refereegranskat)abstract
- The manufacturing industry needs to adapt their product-services to meet customer requirements in today’s rapidly changing markets. This paper presents how technologies can support knowledge sharing and collaboration during product-service processes. This work was part of the European Union Use-it-Wisely project and summaries demonstration results from the project. Six cluster cases from different industry sectors (energy, machinery, space, office workplace, vehicles, and shipbuilding) were developing their tools and processes during the project. Based on the demonstration evaluations, it seems that the Use-it-Wisely project has enabled companies to improve their product-services by using interactive collaborative environments and new business models. Participants that took part in the demonstrations felt that the new approach makes users’ work easier, provides competitive advantage, facilitates knowledge sharing and decision making, extends the efficient lifecycle of existing machinery and supports sustainable development.
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| 2. |
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| 3. |
- Berglund, Fredrik, 1974, et al.
(författare)
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Multidisciplinary Project-based Product Development Learning in Collaboration with Industry
- 2007
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Ingår i: The 3rd International CDIO Conference, MIT, Cambridge, Massachusetts, June 11-14.
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Konferensbidrag (refereegranskat)abstract
- Developing products is a multi-disciplinary process of identifying and envisaging user needs and realizing a product offer that meets these needs. This has to be done in a cost-efficient manner, while ensuring that the developed products exceed customer expectations concerning functionality and quality, and that they stand out from competition. Running project-based education in collaboration with industry allows students to gain experiences in addressing “real” problems and skills in applying industrial working practices in an industrial context. Consequently, product development organizations deliver not just the technical design of the product but a complete product offer. This involves activities such as market analysis, product planning, industrial design and development of after-market services.Some ten years ago, Chalmers University of Technology changed its Product Development project course, which addresses these needs, in order to increase the industrial collaboration and to facilitate a more multidisciplinary project composition. The course is now open for 4th year students from many disciplines including Mechanical Engineering, Automation Engineering, Industrial Management and Industrial Design. Thus, the student teams are multidisciplinary, which enables them to take on a multi-faceted, industry-sponsored product development task. The task requires that all the phases in a product development process are carried out. The students get the opportunity to appreciate that skills possessed by other disciplines are necessary to solve a complex problem, as well as the challenges involved including differences with respect to goals, culture, and disciplinary terminology.
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| 4. |
- Berglund, Johan C, 1978, et al.
(författare)
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Machine Hammer Peening – A Substitute for Polishing of Pressing Die Surfaces?
- 2009
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Ingår i: Proceedings of the International 3'rd Swedish Production Symposium. - 9789163360060 ; :Day 1, s. 184-189
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Konferensbidrag (refereegranskat)abstract
- Machine Hammer Peening (MHP) is a new method for finishing of surfaces. With this method the workpiece surface is hammered with a spherical carbide tool. The main objective of the study was to evaluate whether the MHP method could be used as a plausible substitute for manual polishing in pressing die manufacturing. To do this, sample surfaces were hammered and evaluated. Changes to the surfaces were assessed using surface roughness measurements, hardness measurements and optical images. First of all, the workpiece surface was smoothened. Secondly, the surface hardness was increased significantly. Thirdly, the nodules on the workpiece surface were effected. They appeared to be smaller and not as visible. It is probable that they had been plastically deformed and that some of the graphite in the nodules was replaced by material from the surrounding steel matrix. By replacing the graphite in the larger nodule cavities by surrounding steel material, a die surface is created which would be less prone to galling. In addition, with MHP, the amount of polishing needed to manufacture a die surface can be reduced because of the smoothening effect.
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| 5. |
- Berglund, Johan C, 1978, et al.
(författare)
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Measuring strategies for smooth tool steel surfaces
- 2008
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Ingår i: Proceedings. - Aachen : Shaker Verlag. - 1610-4773. - 9783832269128 - 3832269126 ; , s. 110-119
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Comparisons between different measuring strategies were made on three types of smooth tool steel surfaces. Three replica materials were tested to study possibilities within replication techniques. An optical interferometer as well as a mechanical stylus was used to evaluate the surfaces. The results showed that the tested replica materials generated good representations of both the form and the surface roughness (Sq > 300 nm). The evaluated surfaces were quite homogeneous, thus, few measurements are needed to get representative results. However, it was found that caution must be taken regarding manually polished surfaces which can be less homogenous and therefore require more measurements to get representative results.
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| 6. |
- Berglund, Johan C, 1978, et al.
(författare)
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Milled die steel surface roughness correlation with steel sheet friction
- 2010
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Ingår i: CIRP Annals - Manufacturing Technology. - Bern : Elsevier BV. - 1726-0604 .- 0007-8506. ; 59:1, s. 577-580
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Konferensbidrag (refereegranskat)abstract
- This work investigates correlations between the surface topography of milled steel dies and friction with steel sheet. Several die surfaces were prepared by milling. Friction was measured in bending under tension testing. Linear regression coefficients (R^2) between the friction and texture characterization parameters were tested. None of the height, spacing, material volume, void or segmentation parameters showed good correlations. Developed area, rms surface gradient, relative area and complexity showed strong correlations (R^2 > 0.7). For area-scale fractal complexity the correlation increases markedly at scales below 200 μm^2, with a maximum R^2 of 0.9 at 50 μm^2.
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| 7. |
- Berglund, Johan C, 1978, et al.
(författare)
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Robust and Easy to Use Quality Control of Roughness on Milled Tool Steel Surfaces
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - 9789163327575 ; , s. 284-289
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Konferensbidrag (refereegranskat)abstract
- This study was an evaluation of measuring strategies using a handheld 2D profiler for quality control of finish milled tool steel with regard to surface roughness. A selection of ball nose end mills in combination with two different tool steels (hardness 39 and 47 HRC) were used to manufacture the surfaces that were to be measured. It was found that using an appropriate measuring strategy it is possible to measure the roughness of these relatively smooth surfaces (0.1
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| 8. |
- Berglund, Johan C, 1978, et al.
(författare)
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Surface Finish and Roughness Measurement in Die and Mould Manufacturing
- 2008
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Ingår i: Proceedings of the 2'nd Swedish Production Symposium. ; , s. 385-391
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Konferensbidrag (refereegranskat)abstract
- In die and mould manufacturing, the method used for quality control of finished surfaces is usually visual and tactile inspection of the finish, which is not easily quantifiable. In this study, an evaluation of the connection between surface finish appearance and measured surface roughness was carried out using scale-sensitive fractal analysis to find functional correlations and to determine suitable cut-off limits for functional data filtration. A selection of ball nose end mills in combination with two different tool steels (hardness 39 and 47 HRC) were used to manufacture surfaces that were measured. It was found that the method employed in this study for evaluating functional correlations and designing filters worked well. It was also found that there is a correlation between the surface roughness parameter Sq and the surface finish appearance and that this correlation is stronger in certain wavelengths on the surface.
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| 9. |
- Berglund, Johan, et al.
(författare)
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Robust and Easy to Use Quality Control of Roughness on Milled Tool Steel Surfaces
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde : Skövde University. - 9789163327575 ; , s. 284-289
-
Konferensbidrag (refereegranskat)abstract
- This study was an evaluation of measuring strategies using a handheld 2D profiler for quality control of finish milled tool steel with regard to surface roughness. A selection of ball nose end mills in combination with two different tool steels (hardness 39 and 47 HRC) were used to manufacture the surfaces that were to be measured. It was found that using an appropriate measuring strategy it is possible to measure the roughness of these relatively smooth surfaces (0.1<1µm) with satisfactory accuracy using a handheld profiler. However, it was also found that, in contrast to what is common practice, Ra is not a suitable parameter to use for evaluation. Instead, using Rz or Rp is suggested. To be able to control quality, the machining process (selection of cutting tool, cutting data, workpiece material etc) as well as limits for the evaluated parameters first have to be established.
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| 10. |
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