Advanced Materials Research Vols. 102-104

Abstract: With the rapid development of IC and photovoltaic industry, the requirements of larger-diameter, better productivity, higher machining accuracy and finer surface quality of silicon wafers challenge traditional wafer cutting technology. Therefore, in terms of increasing wafers’ diameter, lessening slicing thickness, reducing cutting loss and improving machining efficiency, research and application of precision cutting technology become necessary and urgent. The paper analyzes current well-developed technologies and equipments of free abrasive wire cutting in detail. It is recommended that bonded abrasive diamond wire cutting will be the development trend in the future as a highly-efficient, low material waste and environmentally friendly technology of precise cutting of silicon wafers. The paper also makes a discussion on construction, working principle, and manufacturing technology of bonded abrasive diamond wires.

Abstract: Machining of the variable pitch screw is difficult in mechanical manufacturing and that of variable pitch and depth screw is more difficult.This paper argues about applying macro program to machine profiled screw in NC milling machine tool and the result is of satisfaction.This provides another method for the machining of profiled screws.

Abstract: According to the process characteristics of shell ring, the cutting parameters have been optimized by adopting appropriate boundary conditions at different machining stages and the optimal cutting parameters have been achieved. The objective function and constraints boundary have been stored into the database, which form basic data structures of database. Cutting parameters have been obtained for new type tools using rule-based reasoning approach. According to the characteristics of large number of changing tool for shell ring, tool life prediction is designed, which is very favorable for large shell ring processing. In addition, on-site processing recorded video will be added to the database by multi-media technology, which achieves the diversity of data structure.

Abstract: To deal with problem of manufacturing system stability caused by uncertain factors in discrete production process, holon was introduced to manufacturing execution system (MES). A distributed manufacturing control architecture based on holon was established. This architecture using cooperation mechanism based stigmergy to realize agility, autonomy and intelligence of system control. Based on the architecture, holon driven agents to visit production elements, acquiring dynamic information of production process. Model design of production factors as order, resource, raw material, product and management factors as optimize, execution was described amply. Finally, workflow of this system was depicted with an example of uncertain order factor.

Abstract: During the process of developing product, AO directly affects assembly efficiency and assembly quality for mechanical product. Usually, new mechanical product is developed according to the knowledge and experience. So it is very important how to utilize the knowledge and experience to plan the AO. This paper presents a planning approach based on CBR for AO of mechanical product. Firstly, a method based on hierarchy model represents AO cases. And we store the AO cases into the AO Case Library to accumulate the knowledge and experience of assembly process. Secondly, the Euclidean distance is applied to calculate the similar characteristic between the component of AO of Query (AOQ) and the component of the AO cases in the Library. When some distances are less than the value, the corresponding AO cases are selected to the next calculation. Thirdly, the Manhattan distance is applied to calculate the similar characteristic between AOQ and the selected AO cases. When the distance is minimal, the optimal AO case is obtained. The approach is applied successfully to plan AO for a part of aircraft’s wing.

Abstract: Industrial relocation is conducive to spatial production specialization in the age of information network and economic globalization. Although it will affect the regional industrial competitiveness and employment levels in the short term, in the long run it is conducive to the sustainable development of regional manufacturing clusters. Based on the location model of the micro-enterprise perspective, the paper concluded that: Cournot competition will cause spatial agglomeration, while Bertrand competition leads to industrial relocation. At the present stage, the development mode of manufacturing clusters in Zhejiang is close to Bertrand competition. To achieve the restructuring and upgrading of manufacturing clusters, it is necessary to implement desiring policies to promote the competitiveness of enterprises out of the Bertrand competition, and to increase R&D inputs to enhance the degree of product differentiation. Finally, the paper did an empirical study with an example of Taizhou sewing equipment manufacturing cluster.

Abstract: Dynamic lot sizing problem for systems with bounded inventory and remanufacturing was addressed. The demand and return amounts are deterministic over the finite planning horizon. Demands can be satisfied by manufactured new items, but also by remanufactured returned items. In production planning, there can be situations where the ability to meet customer demands is constrained by inventory capacity rather than production capacity. Two different limited inventory capacities are considered; there is either bounded serviceables inventory or bounded returns inventory. For the two inventory case, we present exact, polynomial time dynamic programming algorithm based on the idea of Teunter R, et al. (2006).

Abstract: The defects in gas-assisted injection molding are mainly caused by processing parameters improper adjustment. The model for artificial neural network was developed, and was trained through the software platform MATLAB. By the bridle-wise network, the experimental parameters could be set quickly and intelligently. The correctness of these parameters was validated by CAE simulation.

Abstract: In order to translate the Customer Needs (CN) for the specific product into the right Technical Requirements (TR), the structure of conventional House of Quality (HOQ) is modified to have HOQ fit in with the needs of multi-attribute decision-making. Then, an Objective Programming Model (OPM) based on HOQ is constructed, which fully considers the design team's experience, and the interdependence between CN and TR, and the inner-dependences within themselves, along with resource limitations, and multi-objective nature of the problem. The target values of TR are obtained by solving the OPM using MATLAB, which can fully meet the CN. Finally an example is given, and the OPM is proved to be reasonable and effective.

Abstract: Open vehicle routing problem is a kind of special vehicle routing problem, in which the vehicles do not return the depots after completing the task. Aiming at open vehicle routing problem, the mathematical model was founded by introducing virtual depots. A quantum evolutionary algorithm combined with local optimization algorithms was proposed in this paper, in which 0-1 matrix encoding was used to construct chromosomes, rotation gate with adaptively adjusting rotation angle was used to realize evolution, nearest neighbors and 2-Opt were incorporated to further improve solutions. Based on benchmark problems, the algorithm’s parameters were discussed, and the computation result was compared to those of other algorithms. The Computation results indicated that the proposed algorithm was an efficient method for solving open vehicle routing problem.