Papers by Keyword: Manufacturing

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Authors: Wan Hasrulnizzam Wan Mahmood, Mohd Noor Hanif Mohd Rosdi, Mohd Razali Muhamad
Abstract: This paper proposes a conceptual framework in determining manufacturing complexity. Manufacturing complexity is divided into five main components which are product behaviour, infrastructure capability, production planning, information management and personnel perception. These five main components then divided into twelve sub components. Lastly all these components are classified in two categories which are internal complexity and external complexity. These components are interrelated, such that a bi-directional relationship exists between internal and external complexity. The conceptual framework initiated in this paper can be used by manufacturers to gain more understanding on manufacturing complexity. Thus manufacturers can take proper actions to align themselves with the issues brought forth by manufacturing complexity.
Authors: M. Milana, Mohammed Khurshid Khan, J. Eduardo Munive
Abstract: The dependency of maintenance as a manufacturing logistic function has made the considerations and constrains of maintenance decisions complex in nature. The rapid growth of automation in manufacturing process has also increased the role of maintenance as an inseparable business partner. As consequence, maintenance strategy and operations should always be aligned with business and manufacturing perspectives within a holistic and integrated manner to achieve competitive advantage. This paper presents a framework of Knowledge Based System for Integrated Maintenance Strategy and Operation (KBIMSO) linked to business and manufacturing perspectives. The KBIMSO framework has novelty of simultaneously highlighting the elements of business, manufacturing and maintenance perspectives which contribute to direct maintenance performance and can be used by the companies to evaluate their existing maintenance system in relation to business competitive priorities and manufacturing process requirements in order to gain optimal maintenance performance as the competitive driver.
Authors: Kazem Abhary, Keith Garner, Zlatko Kovacic, Sead Spuzic, Faik Uzunovic, Ke Xing
Abstract: Hot steel rolling is amongst the most important industrial techniques because of huge amount of consumed resources, immense environmental impact, and the significance and enormous quantity of long products. Criteria for improving rolling operations include process efficiency, resource consumption, system reliability, product quality and ergo-ecological sustainability. There is an increasing availability of information within and beyond the domain of forming by rolling. With advances in computerised information processing, it becomes apparent that further progress is to be sought in intelligently combining the strategies and theories developed in differing disciplines. The key to optimising rolling systems is to be found in hybrid models. This approach calls for utilising cross-disciplinary knowledge, including a selection amongst methods such as stochastic, fuzzy and genetic modelling, process control and optimisation as well as supply chain and maintenance management. Evidence obtained by experiments using small-scale chemo-physical modelling encourages the use laboratory rolling for preliminary validations. Research strategy is conceptualised on the basis of a knowledge-based hybrid model. The sample space for this model is constituted by the rolling passes translated into the form of vectors. An example of a rolling pass translation into the vector form is presented.
Authors: Z. K. Li, F. Wang, L. Gao, Y.J. Fan
Abstract: This paper analyzes the problems in traditional manufacturing and assembly, puts forward the Estimation Indication for Cost of Quality Losing in an optimization assembly which will be based on RFID. Though this assembly is a kind of selective one, the whole production will be according to the law of interchangeability. Take the hydrostatic bearing for example, and reduce the machining accuracy on the permitted assembling accuracy. At this condition, the quality of assembly will be guaranteed, but the cost and time of manufacturing will be decreased.
Authors: Jiang Long, Wei An Jiang
Abstract: In order to improve the overall equipment effectiveness, a new method for maintenance scheduling in manufacturing systems using the philosophies of TPM and MFOP is presented in this paper,considering both the production process and maintenance operations of manufacturing equipment. An LCC analysis is also conducted for evaluating and searching for the optimal maintenance schedule.
Authors: Rita Ambu
Abstract: In this paper a procedure based on a statistical approach to manufacturing for the analysis of tolerance chains is reported. In particular, the proposed approach can be summarised into two main steps. First, each single technological operation (for example, the drilling of a hole) is simulated by extracting, from a statistical distribution typical of the machine tool, the parameters characteristic of the manufacturing procedure. Then, a simulation is performed, to verify if the real features of the part can simultaneously fit the virtual gage. This method of acceptance/rejection of a part is according to the ISO/ASME standards and is representative of the real functional requirements of the part.
Authors: L.P. Ferreira, E. Ares, G. Peláez, M. Marcos, M. Araújo
Abstract: This paper proposes a methodology to analyze complex manufacturing systems, based on discrete-event simulation models. The methodology was validated by performing different simulation experiments and will be applied to a multistage multiproduct production line, based on a real case, with a closed-loop network configuration of machines and intermediate buffers consisting of conveyors, which is very common in the automobile sector. A simulation model in an Arena environment was developed, which allowed for an analysis of the important aspects not yet studied in specialized literature, namely the assessment of the impact of the production sequence on the automobile assembly line. Various sequence rules were analyzed and the performance of each of the corresponding simulation models was registered.
Authors: Li Yang Dong, Ping Yi Liu, Wen Jun Wei, Hai Tao Li, Xue Zhu Dong
Abstract: To solve the problem of allowance equalization in the grinding process of an enveloping toroidal worm after turning by using the hindley worm turning method, a milling method was presented based on discretization of the spiral surfaces rather than the generating principle. The method is used on a CNC tuning center with a cylindrical end milling cutter rather than on a specialized machine tool. The material of the spiral grooves of the worm was removed layer by layer both in the tangential and the radial directions of the torus of the worm from the tooth top circle to the tooth root circle. The milling model was built, and the coordinates of the discrete points on the spiral surfaces were calculated according to the theoretical equations of the spiral surface of the worm. A series of feed positions X and Z of the milling cutter and the corresponding rotating angles C of the worm were determined for programming. The grinding allowance of a planar enveloping toroidal worm on axial sections was calculated and the trial manufacturing was performed. The allowance in the subsequent grinding process could be equalized and the manufacturing efficiency could be increased greatly.
Authors: Yan Ma, Quan Hui Wu, Chun Mei Yang, Feng Ming Jing
Abstract: This paper described a miniature refiner plate and its manufacturing. The plate was used for preparation of timber microfibril. Grinding teeth used Archimedes spiral groove as a path, the path effectively increased grinding trajectory path; all grinding teeth and alveolus unit were in the same equal length, effectively increasing the flow and easy to manufacture. The semifinished plate was processed in an ordinary lathe, then the processed surface was quenching, ensuring hardness, wear resistance and fatigue strength.
Authors: Jun Ming Hou, Kun Pan, De Xu Yang, Lian Xing Gao
Abstract: Peanut is one of the important oril corps, which is applied in the food and other fields. How to realize the peanut shelling is a problem to be solved. A methodology for peanut shelling machine design in manufacturing system is proposed in the paper. CBR method is applied for shelling manchine desing. The basic conception is introduced. The CBR method that applied for key part design of shelling machine is introduced in detail. An example is got for the methodology.
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