| 1. |
- Buckholtz, B., et al.
(författare)
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Remote equipment security in cloud manufacturing systems
- 2016
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Ingår i: International Journal of Manufacturing Research. - : Inderscience Enterprises Ltd.. - 1750-0591. ; 11:2, s. 126-143
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Tidskriftsartikel (refereegranskat)abstract
- With the growing development of cloud manufacturing (CM) applications in industry, one concern potential users have is security of the data, remote machines and operators. Potential security risks in communication with remotely operated manufacturing equipment have been of recent interest. The purpose of this paper is to provide an overview of security measures being considered to ensure the protection of data being sent to physical machines in a CM system. Topics covered include: internet of things, remote equipment control, security concerns in remote equipment control, existing proposed security measures for remote equipment control, and the future outlook of remote equipment control and security in CM systems.
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| 2. |
- Cui, Y., et al.
(författare)
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Research on measurement of cutting area temperature and its prediction model
- 2018
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591. ; 13:3, s. 209-226
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, the temperature measuring tool based on NiCr/NiSi thin film thermocouple is developed. 6,061 aluminium alloys is selected as the experiment object. Based on the cutting area temperature result during field test, the central composite design is utilised, which contains the parameters of cutting speed, feed rate and cutting depth. Regarding each parameter, three levels are selected and then the second-order regression equation between cutting area temperature and three cutting parameters is established. The data of experimental measurement corresponds well with the mathematical prediction, which confirms that the experimental and mathematical methods are valid in the research on cutting area temperature.
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| 3. |
- Ståhl, Jan Eric
(författare)
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An integrated cost model for metal cutting operations based on engagement time and a cost breakdown approach
- 2017
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 12:4, s. 379-404
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Tidskriftsartikel (refereegranskat)abstract
- In all manufacturing processes, it is important to determine the costs and their distribution between different sequential processing steps. A cost equation based directly on the losses during manufacturing, such as rejection rate, stops and waste of workpiece materials, also provides a valuable aid in giving priority to various development activities and investments. The present work concerns how a cost model presented earlier for calculating part costs can be developed to describe part costs as a function of the cutting data and tool life time T selected. This enables a tool life model to be a directly integrated into the cost model by use of tool engagement time. The model presented also takes into account the part costs for scrap incurred in connection with forced tool changes. Examples are also given of how the model developed can be used in the economic evaluation of various cutting tools and workpiece materials.
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| 4. |
- Svahn, Mattias, et al.
(författare)
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Prediction of the cutting forces in gear hobbing and the wear behaviour of the individual hob cutting teeth
- 2018
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Ingår i: International Journal of Manufacturing Research. - 1750-0591. ; 13:4, s. 342-358
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, a mathematical model is presented, by which the cutting forces in a gear hobbing process and the wear behaviour of the hob's all cutting teeth are predicted. The load on each individual hob cutting tooth varies heavily in the gear hobbing process. To predict the cutting force, and subsequently the tool wear, a detailed determination of the chip geometry is needed. The undeformed chip geometry is continuously determined by analytical differential description presented in previous research. In the model all cut chips are determined for the full production cycle of a gear blank, where the gear blank boundaries are considered. Considering the full production cycle is needed to get an understanding of the load the tool will experience and the wear behaviour of the hob teeth.
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| 5. |
- Syberfeldt, Anna, et al.
(författare)
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Robust product sequencing through evolutionary multi-objective optimisation
- 2015
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Ingår i: International Journal of Manufacturing Research. - : InderScience Publishers. - 1750-0591. ; 10:4, s. 371-383
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Tidskriftsartikel (refereegranskat)abstract
- This paper describes a study on efficient optimisation of real-world product sequencing problems with the aim of finding robust solutions. Robust solutions are insensitive to unforeseen disturbances in a manufacturing process, which is a critical characteristic for a successful realisation of optimisation results in manufacturing. In the paper, the traditional method of achieving robust solutions is extended by using standard deviation as an additional optimisation objective. This transforms the original single-objective optimisation problem into a multi-objective problem. Using standard deviation as an additional objective focuses the optimisation on solutions that have both high performance and a high degree of robustness (that is, a low standard deviation). In order to optimise the two objectives simultaneously, a multi-objective evolutionary algorithm based on the Pareto approach is used. The multi-objective method for increased robustness is evaluated using both a benchmark problem and a real-world test case. The real-world test case is from GKN Aerospace in Sweden which manufactures components for aircraft engines and aero-derivative gas turbines. Results from the evaluation show that the method successfully increases the robustness while maintaining high performance of the optimisation.
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