Key Engineering Materials Vol. 572

Abstract: The advantages of linear piezoelectric motor which has low velocity, large output force, non-electromagnetic disturbance and high response speed are concerned wildly in astronautic industry and manufactural industry. A unidirectional and linear piezoelectric motor has been designed based on these advantages. The stiffness and resonant frequencies of the clamping structure and driving structure are calculated by mathematic model. The characteristics of long distance, slow velocity and large output force are realized. This motor can be used in the equipment which needs long distance, small inertia, large driving force and disposable movement. The stiffness and resonant frequencies of clamping structure and driving structure, no-load characteristic and motion characteristics under different loads are tested in the experiment. The results of the stiffness satisfy the theoretical design. The no-load resonant frequencies are high and the maximum resonant frequency dwindles with increasing load.

Abstract: Carbonized Micron Wood Fiber (CMWF) has many merits of high filtration efficiency, low cost, green environmental protection and so on. Besides, it also has the properties of activated carbon, which makes its adsorption ability for nanoparticles emitted by a diesel engine much stronger. In this paper, the adsorption number density of the nonoparticles in the CMWF filter under the different conditions is simulated based on Grand Canonical Ensemble Monte Carlo Method (GCEMC). Moreover, the result of simulation is validated by a engine bench experiment. Theoretical deduction and experiment results both prove the simulation method can be applied to simulate the adsorption process of the nanopaticles.

Abstract: This paper offers development of the building envelope that aims to revive a new expression of traditional decorative elements by applying digital technology as well as having an adaptive function. This paper also proposes a camshaft mechanism system to transform the pattern of traditional ornament that uses pre-programmed analysis data of environmental changes to parametrically drive the number of rotation phase and Lobe Lift that generates the shape of camshaft. Furthermore, this shapes drives the transformation of the basic pattern. In conclusion, this paper has developed a prototypical tool that facilitates the new approach to kinetic decorative ornaments on building envelopes.

Abstract: In this paper, we analyze the service relationship among the participants of integrated manufacturing system, and present a framework of service engineering of integrated manufacturing system. That is a kind of service-oriented manufacturing model. Manufacturers pay more attention to customer participation and their experience in the process of manufacturing and servicing. In the network economy era, integrated manufacturing system is built with the participants network-based cooperation. A new model of service of integrated manufacturing system is based on cloud computing. Service providers offer their services through the network, to make the cooperation more effective, to add the value for customers. At the same time, the coordinated innovation services model become an ordinated way to promote the cooperation of the participants of integrated manufacturing system.

Abstract: In this paper we investigate the elaboration of an efficient production schedule for sustainable manufacturing systems. Because renewable energies are irregular by nature as they often depend on meteorological conditions (e.g. wind and solar energy), their use in the competitive field of manufacturing production must be addressed with caution. The challenge is to elaborate a reliable production schedule that accommodates energy stochastic fluctuations while satisfying customer and operational constraints. We propose to solve the problem using a meta-heuristic based on Tabu search and discuss major elements that are critical to the success of this approach.

Abstract: Current PLM systems have concentrated on product design, not on manufacturing engineering with its development of e.g. Material flows and layouts. This paper proposes an approach to describe how to represent the main required manufacturing process data using ontologies together with generic data standards. This approach makes it possible to develop translations between different software, and also providing users with the meaning of different concepts. It contributes to an efficient management of manufacturing information, with a focus on the material flow information as used in Discrete Event Simulation - DES.

Abstract: Today’s production systems need to adapt rapidly to changing product requirements. Adaptation can be eased by formal models, representing product requirements and system capabilities, which convey the needed information for adaptation planning activities. This paper presents an adaptation approach, which is based on matching the product requirements to the resource capabilities, and applies it to a practical case study in TUT-microfactory environment.

Abstract: Open shop scheduling problem was studied, and a dense scheduling algorithm based on semi-matching theory was proposed. Using decomposition strategy, the scheduling problem was converted into iterations of resource assignment. Based on this, dense scheduling was constructed by the construction and optimization of primal solution. To improve computational efficiency, the semi-matching model of the resource assignment problem with the optimal function of load balancing was developed. The optimal semi-matching searching algorithm based on augmenting path was proposed. And a dense scheduling construction method with two steps was proposed, as well as initial solution optimization methods and mechanisms to eliminate interference among machines. At last, the validity of the developed scheduling algorithm was illustrated by benchmarks of Taillard.

Abstract: Design For Assembly (DFA) is a tool to evaluate the design of parts and the products assemblability. Additionally, DFA is a key tool to reduce both cost and assembly time. DFA includes a set of techniques and procedures that, when applied properly, makes the product assembly more efficient. Assembly takes between 20% and 60% of production time, and represents between 25% and 75% of the total cost of the manufactured products. Existing techniques consider weight and size restrictions to assess the design features of the products. All those components not considered within the weight and size constraints are qualified in equal way. For the scope of this research large and heavy parts are defined as parts that measure above one meter and weight from five kilograms to five tons. Most products of large size have assemblies and subassemblies. Additionally there are a number of processes for handling an assembly of large and heavy components. Despite the information identified, further research focused to improve the knowledge in assembly methods is needed. This paper presents the state of-the-art in the assembly of large and heavy components analysis and to be a reference for future research.

Abstract: Purpose: This paper shows the effects of using Minomi on the provision of long items in the plant area. In details it will be evaluated if the Minomi principle is usable for the provision of long item material at the manufacturing area and what improvements can be achieved. Definitions of the term Minomi and the term long item: The term long item is used in the logistic sector for all materials that are longer than 2.5 meters, require individually packing and have a relatively small cross section [1,2]. The term Minomi has not been clearly defined. In practise, the term Minomi is often associated with a system that does not use boxes for the material provision [3]. Findings: Through the case studies, it has been found that additional advantages can be obtained by using Minomi for the provision of long items than the other existing methods.