| 1. |
- Adane, Tigist Fetene, et al.
(författare)
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System dynamics analysis of energy usage: Case studies in automotive manufacturing
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; 9:2, s. 131-156
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Tidskriftsartikel (refereegranskat)abstract
- Our life is strongly linked with the usage of natural resources. With increase in world population and welfare there is an increasing global demand for raw material. Energy is a necessity in everyday life and is often generated using non-renewable natural resources which are finite. Manufacturing is one of the largest energy and material resource consumers. There is great concern about minimising consumption of energy in manufacturing industry to sustain the natural carrying capacity of the ecosystem. This is one of the challenges in today’s industrial world. The paper presents the application of system dynamics theory for modelling and simulation of complex manufacturing processes. The simulations help to understand the intricate nature of the interrelation of process parameter and to make sound decision about minimising the energy losses. Two case studies are presented, one in cylinder head casting processes and the other in crankshaft machining. The developed models provide an insight into how to select critical operations and to identify the effect of various parameters on the energy consumption. Also, the models help to understand how changes of parameters over time affect the behaviour of energy changes. The outcome of this research enables the company to identify potential avenues to minimise energy usage and offers a decision support tool.
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| 2. |
- Hilletofth, Per, et al.
(författare)
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Two sides of a token : coordinating demand and supply at furniture wholesaler
- 2012
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Ingår i: International Journal of Manufacturing Research. - : Inderscience Publishers. - 1750-0591 .- 1750-0605. ; 7:2, s. 101-122
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Tidskriftsartikel (refereegranskat)abstract
- This research work investigates the occurrence of Demand-Supply Chain Management (DSCM) components in a Swedish furniture wholesaler that sources most of its products from China. Three of the eight main components of DSCM were identified in the case company and one component was not fully applicable. The case shows possible caveats of being demand-driven and highlights the need to balance demand and supply sides simultaneously. During economic crisis years 2008-2009, business has experienced extraordinary decline in sales and profitability, while holding considerable amount of inventory at hand. In the long term, supply chain strategy relying on Chinese manufacturing could face increasing challenges in total costs owing to currency changes, transportation costs increase and environmental regulation.
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| 3. |
- Mark, Andreas, 1980, et al.
(författare)
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Optimisation of Robotised Sealing Stations in Paint Shops by Process Simulation and Automatic Path Planning
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; 9:1, s. 4-26
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Tidskriftsartikel (refereegranskat)abstract
- Application of sealing materials is done in order to prevent water leakage into cavities of the car body, and to reduce noise. The complexity of the sealing spray process is characterised by multi-phase and free surface flows,multi-scale phenomena, and large moving geometries, which poses great challenges for mathematical modelling and simulation. The aim of this paper is to present a novel framework that includes detailed process simulation andautomatic generation of collision free robot paths. To verify the simulations, the resulting width, thickness and shape of applied material on test plates as a function of time and spraying distance have been compared to experiments. The agreement is in general very good. The efficient implementation makes it possible to simulate application of one meter of sealing material in less than anhour on a standard computer, and it is therefore feasible to include such detailed simulations in the production preparation process and off-line programming of the sealing robots.
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| 4. |
- Mattsson, Sandra, 1984, et al.
(författare)
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Comparing quantifiable methods to measure complexity in assembly
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591 .- 1750-0605. ; 9:1, s. 112-130
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Tidskriftsartikel (refereegranskat)abstract
- In order to measure complexity and stay competitive, manufacturing companies need to be able to quantify production complexity. For this reason, two methods were developed within the context of two concurrent research projects are compared: the Belgian Complexity Calculator, CXC, measures objective complexity and the Swedish Complexity Index, CXI, focuses on subjective complexity, as experienced by operators in the stations. This paper presents a comparative analysis of the two methods by comparing them to seven relevant existing quantitative methods and by examining results from case studies. It is observed that the two methods can be used as a compliment to one another, where CXC can be used for scanning data automatically CXI can be used for in-depth analysis. In addition, the comparison of existing methods provides insight on how to measure complexity depending on need and scope.
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| 5. |
- Björkman, M., et al.
(författare)
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Editorial
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:1, s. 1-3
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Tidskriftsartikel (refereegranskat)
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| 6. |
- Björkman, M., et al.
(författare)
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Swedish Production Symposium 2012
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:1
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Tidskriftsartikel (refereegranskat)
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| 7. |
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| 8. |
- Bruch, Jessica, et al.
(författare)
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On the production location decision : A case study on process and criteria
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:1, s. 74-91
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Tidskriftsartikel (refereegranskat)abstract
- The paper explores the process and criteria used in production location decisions, based on a literature overview and a case study in a Swedish manufacturing company with a global production network. The data collection comprised interviews with top management and project management as well as a document analysis. The findings indicate that the production location decision process is facilitated by following a stepwise process with an initial strategic analysis with a broad scope including also the selection of the future production system concept.
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| 9. |
- Eriksson, David, et al.
(författare)
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Matching supply chain strategy with business strategy and the results of a mismatch
- 2012
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Ingår i: International Journal of Manufacturing Research. - : Inderscience Publishers. - 1750-0591. ; 7:2, s. 181-197
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Tidskriftsartikel (refereegranskat)abstract
- Recent research suggests that supply chains should be demand driven, as this allows them to better exploit differentiation opportunities. Application of this theory is, however, not straightforward, as improper implementation can cause rapid escalation of inventory levels and unit costs. Using the case study method, this research aims to highlight these problems, and to provide deeper knowledge about how supply processes are affected by a consumer-focused business strategy. Apart from identifying the problems that may occur when attempting to be more market-driven, e.g., reduced supply chain performance due to product proliferation, this research also identifies some appropriate means to overcome them, including postponement and differentiated sourcing.
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| 10. |
- Gutnichenko, Oleksandr, et al.
(författare)
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Influence of cutting speed and tool wear on vibrations and process stability when turning Inconel 718 with PCBN tools
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:2, s. 173-193
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Tidskriftsartikel (refereegranskat)abstract
- Results of the study of cutting speed and tool wear influence on the vibrations and their nature during machining superalloy Inconel 718 with low cBN content (cBN-L) and binderless pcBN (bcBN) tools are presented. Cutting speed was varied from 2 to 14 m/sec while other cutting conditions were constant. The process evolution was studied with the wavelet transform of tool acceleration spectra. Behaviour of the dynamic system was found to vary with the cutting speed and the specifics of tool wear. It is shown that machining with bcBN tools was accompanied by appearance of significant vibration when cutting speed exceeded 5 m/sec, but the machining with cBN-L was characterised by the suppression of vibrations over the entire speed range. This was related to the difference of tool microgeometry development during the course of wear. The wear of bcBN tools, in contrast to cBN-L, was characterised by merger of crater and flank wear and formation of negative clearance angle. Such difference results in an increase of cutting forces 2-4 times as compared to cBN-L tools. Estimation of dynamic stability by 0-1 test confirmed the process instability when turning with bcBN tools at cutting speeds higher than 8 m/sec which concurs with chatter appearance.
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| 11. |
- Hilletofth, Per, et al.
(författare)
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Editorial
- 2012
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591. ; 7:2, s. 99-100
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 12. |
- Hilletofth, Per, et al.
(författare)
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Editorial
- 2012
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Ingår i: International Journal of Manufacturing Research. - : InderScience. - 1750-0591. ; 7:2, s. 99-100
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 13. |
- Kaplan, Alexander, et al.
(författare)
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A procedure to fully control and trace the weld quality for laser-arc hybrid welding under production conditions
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:1, s. 92-111
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Tidskriftsartikel (refereegranskat)abstract
- Hybrid welding combining a laser beam with a MIG/MAG-arc has high potential to fill joint gaps and to shape the weld surface. The geometrical variations and the oxidation of the joint edges can have significant influence on the resulting weld surface shape and on fatigue life. In the presented study, edge tolerances such as edge mismatch were measured. By consequent scanning of the tolerances, high speed imaging of the melt pool flow dynamics and scanning of the resulting weld surface profile, a systematic identification and explanation of the weld quality on the joint edge conditions can be achieved, even for complex products in rough industrial environment. A corresponding general procedure is presented. From a case study, the limits of quality aspects such as undercuts were quantitatively identified and qualitatively explained.Copyright
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| 14. |
- Keshavarzmanesh, Shadi, et al.
(författare)
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Design and simulation of an adaptive and collaborative assembly cell
- 2010
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591. ; 5:1, s. 102-119
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Tidskriftsartikel (refereegranskat)abstract
- Nowadays, product-mix in small batches contributes to shop floor uncertainties, whereas distributed resources are handled collaboratively during assembly planning. There is a growing need to develop methods that can increase adaptability and flexibility in dynamic and collaborative job-shop assembly floors. Based on our previous work on an assembly planning framework using Function Blocks (FBs), a novel approach to assembly planning and control is developed, which enables adaptive decision making besides effective plan execution. Following our previous work, this paper reports the latest development of design and simulation of an FB communication network in Matlab-Simulink environment, and validates the methodology through an example.
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| 15. |
- Li, Yujiang, 1985-, et al.
(författare)
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User friendly development architecture for standardised modelling : STEP Toolbox
- 2014
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Ingår i: International Journal of Manufacturing Research. - : Inderscience Enterprises Ltd.. - 1750-0591. ; 9:4, s. 429-447
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Tidskriftsartikel (refereegranskat)abstract
- Standardised information modelling is currently an important solution of enhancing the interoperability of computer-aided technology (CAx) systems in the manufacturing industry. The success of this solution is critically dependent on the complexity of data structure and implementation methodology. This study presents development architecture, STEP toolbox, which enables users to implement information standards via a simplified process with minimised knowledge requirements. This study starts with an analysis of relevant user groups for different types of tasks and knowledge requirements. Then STEP toolbox is presented as the simplified development architecture that consists of conceptual modelling and an object-oriented application programming interface (API). It is more convenient for typical developers than the conventional implementation methodology. Based on results from test cases for implementing three prototypes, a two-month learning process required for average developers of the information standards is expected to be eliminated.
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| 16. |
- Lin, Q., et al.
(författare)
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Cloud manufacturing in China : A literature survey
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:4, s. 369-388
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Tidskriftsartikel (refereegranskat)abstract
- Cloud manufacturing has been of considerable interest to Chinese academic researchers over the last decade. This paper presents a broad perspective of the research on cloud manufacturing in China. The topics studied mainly include design of cloud manufacturing architecture, resource and capability virtualisation, combinatorial optimisation of virtual resource and capability, design and collaboration of cloud manufacturing services, intelligent searching and matching methods and trust evaluation. The present literature survey also includes two successful cases applying cloud manufacturing in China to verify the feasibility of the cloud manufacturing architecture and services. Potentially interesting directions for future research in this area are also identified.
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| 17. |
- Wang, Lihui, et al.
(författare)
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Cloud Manufacturing
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:4, s. 345-347
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Tidskriftsartikel (refereegranskat)
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| 18. |
- Wang, Lihui, et al.
(författare)
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Web-DPP : towards job-shop machining process planning and monitoring
- 2011
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591. ; 6:4, s. 337-353
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Tidskriftsartikel (refereegranskat)abstract
- Outsourcing, joint ventures and cross-border collaborations have led to job environments geographically distributed. Targeting the distributed environment, the web has been widely used for developing collaborative applications due to its platform, network and operating system transparency and easy-to-use interface. Utilising the existing infrastructure, the objective of this research is to develop an integrated Web-based Distributed Process Planning (Web-DPP) system for job-shop machining operations and execution monitoring. Our approach engages a dispersed working group in a collaborative environment, allowing team members to share real-time information through the Web-DPP. This paper presents both the system design specification and the latest development.
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| 19. |
- Wang, Xi, et al.
(författare)
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Virtualise manufacturing capabilities in the cloud : Requirements, architecture and implementation
- 2014
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 9:4, s. 348-368
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Tidskriftsartikel (refereegranskat)abstract
- In recent years, cloud manufacturing concept has been proposed by taking advantage of cloud computing to enhance the performance of manufacturing industry. Cloud manufacturing can be perceived as two types, i.e., manufacturing version of computing cloud, and a distributed environment that is networked around manufacturing cloud. This paper discusses manufacturing resources, abilities and relevant essentials from the service-oriented perspective. The functional requirements of a cloud manufacturing environment are also discussed, along with an interoperable manufacturing system framework. Cloud resource integration methods have been developed based on the function block and software agent technologies. It is possible to achieve a collaborative, intelligent, and distributed environment via cloud manufacturing technologies.
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| 20. |
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