1. |
- Bengtsson, Marcus, 1977-
(författare)
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A method for implementing condition based maintenance in industrial settings
- 2008
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Ingår i: Proceedings of 18th international conference on flexible automation and intelligent manufacturing. - Skövde : University of Skövde. - 9789163327575 ; , s. 348-356
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Konferensbidrag (refereegranskat)abstract
- Maintenance, as a form of production support, has become increasingly important to ensure equipment availability, quality products, on-time deliveries, and plant safety. Condition based maintenance, where it fits, is one maintenance solution that can increase the effectiveness of maintenance execution. Condition based maintenance is though not utilized in Swedish industry to the extent one would have expected. One reason for this is a gap between theory and practice when it comes to implementing and operating a condition based maintenance approach. Therefore, the purpose of this paper is to investigate how a condition based maintenance approach can be implemented in an industrial setting, and to develop a method that can assist companies in their implementation efforts. The conclusions can be summarized as follows: implementing condition based maintenance consists of many general enabling factors, and it is highly important to consider the interplay between technology, humans, and the organization, rather than just focusing on technology.
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2. |
- 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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3. |
- 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
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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<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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4. |
- Candell, Olov, et al.
(författare)
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eMaintenance : information driven maintenance and support
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde : Högskolan i Skövde. - 9789163327575 ; , s. 365-372
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Konferensbidrag (refereegranskat)abstract
- Today's providers of maintenance and in-service support related to modern aircraft are facing major challenges. A central problem with maintenance and support of aircraft and other complex technical systems is to manage the ever-increasing information flow and system complexity. Both military and commercial operators need to reduce downtime and one way to do this is to speed up the turnaround time for scheduled and unscheduled maintenance, or even better, to reduce the need thereof by implementing condition based maintenance. In order to implement these improved support solutions in a global support environment, eMaintenance is seen as one important building block. eMaintenance includes monitoring, collection, recording and distribution of real-time system health data, maintenance generated data as well as other decision and performance support to all stakeholders independent of organization or geographical location, 24 hours a day, 7 days a week (24/7). eMaintenance has the potential to improve the management and performance of activities related to the maintenance process, and thereby improve the dependability, safety and life cycle cost of critical systems. This is realized through the application of Information & Communication Technology (ICT) throughout the maintenance and support processes, thus integrating built-in tests, external tests at different maintenance echelons, technical information, diagnostics, prognostics and other sources of support information. The purpose of this paper is to present some results from a joint academic and aerospace industry research project, describing requirements and expectations that are important in a global support environment, and also to propose some central components in an eMaintenance framework that integrates maintenance and ICT perspectives.
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5. |
- Carlsson, Henrik, 1979-, et al.
(författare)
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A General Virtual Manufacturing Concept for Programming, Verification and Optimisation of Complex Control Functions
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing, FAIM 2008: June 30th - July 2nd, 2008, University of Skövde, Sweden. - Skövde. - 9789163327575 ; , s. 668-675
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Konferensbidrag (refereegranskat)abstract
- This paper describes a general virtual manufacturing concept for industrial control systems. Our virtual manufacturing concept provides a distinct advantage; programming, verification and optimisation of complex real-time dependent control functions described by real control code, which can be directly transferred to the real manufacturing system. To achieve this distinct advantage, a time synchronised virtual manufacturing system is a necessity. The aim of this paper is thus to present and to describe in detail, our proposed virtual manufacturing concept. To the authors’ knowledge no such general virtual manufacturing concept, i.e. one that can correctly handle complex real-time dependent control functions, currently exists. To summarise previous work related to virtual manufacturing and industrial control systems, several critical issues have been identified. The virtual manufacturing concept proposed in this paper addresses these issues. To verify that our concept can manage these critical issues found and further is suitable in industrial applications a virtual manufacturing test case is also presented. The test case, that includes motion control (i.e. servo), complex control functions, real control systems etc., was carried out with success.
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6. |
- Christiansson, Anna-Karin, 1947-, et al.
(författare)
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Automation of a robotised metal deposition system using laser melting of wire
- 2008
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Ingår i: 18th International Conference on<em> </em>Flexible Automation and Intelligent Manufacturing (FAIM 2008). - 9789163327575 ; , s. 122-129
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper presents a system for full automation of free-form-fabrication of fully dense metal structures using robotized laser melting of wire. The structure is built of beads of melted wire laid side by side and layer upon layer governed by synchronized robot motion. By full automation is here meant that the process starts with a product specification of a component, and ends in a geometrically validated dense metal component fulfilling industrial material requirements. Due to the complexity of this flexible manufacturing system, a number of different disciplines are involved. This paper discusses mainly the system design, which includes how off-line programming is used for automatic generation of code and how feedback control is used for on-line adjustment of parameters based on desired building properties. To meet industrial needs, the project is carried out in a close cooperation between research and development activities in academy and industry.
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8. |
- Hilletofth, Per, et al.
(författare)
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Integration and formalization of strategic product development and commercialization in a manufacturing company : A challenge for supply chain management
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde : University of Skövde. - 9789163327575 ; , s. 532-539
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Konferensbidrag (refereegranskat)abstract
- The last decades a new type of business environments has evolved characterized by rapid and volatile demand changes, short product life cycles, and high levels of customized products. The competitiveness of a business in these environments is mostly determined by its responsiveness. This is characterized by the ability to quickly scale up or down the production volume, the presence of an innovative and fast product development, and a quick incorporation of consumer requirements into the product development. This paper employs a descriptive case study approach to illustrate how product development and commercialization can be integrated into a product management flow to realize innovative and faster product development. Case study findings reveal that the case company has during a five year period increased the number of successful product introductions. Furthermore, the studied approach proves to be successful in this mature business environment where it is essential to develop products based on the consumer need and behaviour and to differentiate the product assortment. Based on our case study we also recognize that the product management flow does not concern supply chain management (SCM) to some extent in the case company – this indicates that further development is needed in SCM applications to support product life-cycle based managerial processes.
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10. |
- Jäger, Kerstin, et al.
(författare)
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Logistics actors - Key issues for a service developer
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing FAIM 2008. - Skövde, Sweden : University of Skövde. - 9789163327575 ; , s. 1329-1336
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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11. |
- Kans, Mirka
(författare)
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Accessing relevant data within maintenance - problems and possibilities in the realisation of a common database
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing, Skövde, Sweden, June 30 – July 2 2008. - : Runit AB, Skövde. - 9789163327575 ; , s. 340-347
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Konferensbidrag (refereegranskat)abstract
- Data is needed to support all kind of maintenance management activities e.g. in form of registers, procedures and schedules. Moreover, for predictive-proactive maintenance strategies, such as Total Quality Maintenance (TQMain), the ability to monitor performance is a prerequisite for cost-effective management of maintenance. To achieve this, the common database concept was promoted for the definition and collection of a relevant data-set for maintenance management. When defining and collecting a relevant set of data, one will face several challenges, whereas this paper covers following: 1) Connection to full decision-making process, 2) Data filtration, 3) Data heterogeneity, 4) Standardised data and 5) Flexibility. Today, several standards are available which are supporting data definition and information integration within maintenance management. This paper explores the possibilities to use five of these in order to realise the common database concept: EN 13460, EN15341, OSA-EAI, OSA-CBM and IEC62264. The main conclusion is that no standard could fully support the realisation of the common database concept, and due to this, this paper suggests combining two or more standards for achieving the goals. The results in this paper could be used for the selection of appropriate standard to utilise, depending on the challenge to overcome.
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12. |
- Karlsson, Daniel, et al.
(författare)
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Systemic change management : An opportunity for manufacturing organizations
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing FAIM 2008. - Skövde : University of Skövde. - 9789163327575 ; , s. 654-659
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Konferensbidrag (refereegranskat)abstract
- This paper examines potential opportunities at two SMEs (small to medium-sized enterprises) to improve the decision making process for change in their manufacturing organizations. Present procedures of the decision making process for manufacturing system development have been studied by applying feedback systems thinking. A framework for systemic change management is proposed utilizing a bottom-up perspective to acknowledge individual competence and creativity. In conclusion applying system principles facilitates an environment for proactive developments towards a learning organization.
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13. |
- Kvarnström, Björn, et al.
(författare)
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Using process knowledge for simulations of material flow in a continuous process
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - 9789163327575 ; , s. 1138-1145
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Konferensbidrag (refereegranskat)abstract
- In continuous process industries, large investments in automated process control systems are made to reduce variance, but the variance in key process parameters often remain unchanged. One reason is that the operators often lack tools to assess the impact of process changes on the final product properties. Dynamic simulation could be used to estimate effects of attempted changes, on models with current process information and dynamics. However, the use of dynamic simulation for such purposes is infrequent in process industry. Therefore, the purpose of this paper is to outline a simulation model for mineral processing using existing process knowledge. An iron ore pelletizing process was studied, and process knowledge was collected through interviews and research reports. The material flow mechanisms of a critical process section were also determined experimentally. A simulation model of the process was constructed in SIMULINK, and the effects of various variations were tested. The statistical properties of the output distribution of particle residence times were compared for various settings. Finally, various applications field in a mineral process for the simulation model is discussed, for example, predicting or explaining effect of corrective actions.
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14. |
- Linnéusson, Gary, et al.
(författare)
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Cutting Tool Management : A Dynamic Assessment of Opportunities for Improvement
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde : University of Skövde. - 9789163327575 ; , s. 1084-1091
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Konferensbidrag (refereegranskat)abstract
- Lack of time due to daily problems in need of attention restrains proper assessments of improvement opportunities. There is neither proper support at hand to deal with the dynamic complexity of human activity and systems in use. This paper explores if system dynamics simulation can be used to model tooling problems on a management problem level at a manufacturer and evaluates its use. System dynamics is a methodology designed to aid understanding of dynamically complex problems and increases decision making impact. The results focus on the achieved models which prove to have sense behaviour despite lack of thorough data. In conclusion the applied method provides with an analysis of complex problem situations applicable for a decision support, otherwise performed through good guessing. Main characteristics from reality have been included in model and an experimental laboratory to test future policies on achieved.
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17. |
- Rask, Kjell, et al.
(författare)
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Similarities and differences between lean production, tayloristic and socio-technical systems revealed in the methodology characteristics map
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - 9789163327575 ; , s. 995-1001
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Konferensbidrag (refereegranskat)abstract
- In this paper we illustrate similarities and differences between Lean Production, Sociotechnical System Theory and Taylorism (Scientific Management) in the methodology characteristics map. 10 categories are extracted from basic literature and classified for each of the methodologies, for the construction of the chart. 4 of the categories relate to division of work, where we discuss integration and segregation of work. 2 categories relate to instructions and information, while the remaining 4 are related to the general focus of the methodology. With reflections to the illustrated results in the chart, we discuss sources to disagreement about similarities and differences between the methodologies.
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18. |
- Salonen, Antti
(författare)
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Maintenance Strategy - An Enabler for Improved Competitiveness
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde : University of Skövde. - 9789163327575 ; , s. 333-339
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Konferensbidrag (refereegranskat)abstract
- In order to keep production in Sweden the industry has to stay competitive on a global market. This fact increases the demand of high utilisation of automated production equipment. However, research has indicated that the average utilisation of production equipment in Sweden is about 60%. One key factor for increasing the utilisation is effective maintenance of the production equipment. Still, within the manufacturing industry, maintenance is often regarded as a cost driving necessity rather than a competitive resource. In a survey, published 2004, about 70 % of the respondents consider maintenance a pure cost centre. The same survey also revealed that 28 % of the respondents have no maintenance strategy or policy at all. The aim of this paper is to discuss the role of maintenance strategies as a means of making maintenance contribute to competitiveness. The paper is based on a theoretical overview and a case study in which six companies have been studied regarding the perceived quality of their maintenance, the challenges they face, and their view on the strategic impact of production maintenance. In the case study, four companies, which are dissatisfied with their current maintenance, are compared with two reference companies, well reputed for their maintenance excellence. The findings indicate that a strategic view of maintenance is essential for achieving the desired level of maintenance performance. This strategic view has to be held, not only by the production and maintenance management, but by the company management group. While the two reference companies have well formulated maintenance strategies, including aligned measures, acting as roadmaps for their continuous improvement of their maintenance, the four studied companies lack both strategic goals and relevant measures for their maintenance activities. The reasons for this are individual for each company but they share an insight that they need to develop their maintenance in order to stay competitive in their business areas.
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19. |
- Syberfeldt, Anna, et al.
(författare)
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Design of Experiments for Training Metamodels in Simulation-Based Optimisation of Manufacturing Systems
- 2008
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Ingår i: Proceedings of The 18th International Conference on Flexible Automation and Intelligent Manufacturing FAIM 2008. - Skövde : University of Skövde. - 9789163327575 ; , s. 1114-1121
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Konferensbidrag (refereegranskat)abstract
- In this study, the use of DoE for training metamodels in simulation-based optimisation of manufacturing systems is evaluated. The evaluation is done through a case study of a real manufacturing system. A simulation model of the system exist and the aim is to train an Artificial Neural Network as a metamodel of the system with as high accuracy as possible. Two training data sets generated using different DoE designs are evaluated and compared to a random training data set. The combination of DoE generated data and randomly sampled data is alsoevaluated.
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