Advanced Materials Research Vol. 421

Abstract: Conceptual design is the most innovative stages in the life cycle of product development, and effect is the solving tools of TRIZ based on knowledge. The use of effects to solve the problem of conceptual design stage can improve the efficiency of Innovative design and competitiveness of enterprises. The problem-solving process of effects applied was described in this paper. In PROLOG environment, the knowledge representation was used to write the effect as expert knowledge base, and then the reasoning mechanism was used to make a simple expert system of effect. It also can be used to help designers check and resolve the design issues more conveniently.

Abstract: The cost estimation of the product life cycle was researched. On the one side, the life cycle cost present value for manufacturer was estimated, including mainly of target cost, service cost and fault compensation. And a life cycle cost estimation model for manufacturer, which combines target cost and proportion cost estimated, was proposed. On the other side, the life cycle cost present value for user was estimated, including mainly of purchase, installation, commissioning costs in beginning and labor, maintenance, depreciation, maintenance costs in operations. And another life cycle cost estimation model for user, which combines process cost and proportion cost estimated, was proposed.

Abstract: Aiming at the status of the bottom automation system and upper management information system was not effectively integrated in iron and steel enterprise which leads to the delay of production data and the difficult of tracking production process, MES based on real-time database, in which production data is collected, analyzed and processed in real-time using real-time database technology, is researched and designed in this paper, it can optimize production planning and scheduling management level and greatly enhance the production efficiency and promote the core competitiveness of enterprise.

Abstract: In modern continuing steel bars production pipeline, there are various equipments and automatic controls combining with mechanism, electricity, hydraulic pressure and aerodynamic. This field of fault detection and diagnosis deals with design of computer-based automated system that can assist plant operators. The neural network based expert system have advantages of parallel distributed processing, high robust, fault tolerance, adaptive and self-organization. Applying neural network based expert system for the condition detection and fault diagnosis of steel bars pipeline can reduce the economic loss caused by system downtime.

Abstract: The paper put forward a method for the evaluation of multi-supplier quality competitiveness (MSQC) based on Triangular Fuzzy Number-Analytic Hierarchy Process (TFN-AHP) method with the purpose of distinguishing the evaluation between new material of new supplier, new material of old supplier, old material of new supplier and old material of old supplier and in the index configuration, the index weight and the unique evaluation results analysis. The method borrowed can not only used for MSQC comparison, but also for strengths and weaknesses analysis of MSQC. It is a dynamic evaluation method aiming for continuous improvement of supply quality management.

Abstract: During complex manufacturing process, various manufacturing information systems and management information systems are often existing as heterogeneous systems, and manufacturing data is distributed everywhere across the whole value chain of the enterprises. One of the most valuable targets in the integration of these manufacturing information systems is the sharing of enterprise resources which are described in different formats in different information systems. In this paper, meta-resource model is extended using workflow to combine enterprise resources together with business process during manufacturing. Then, an effective method of data integration is proposed based on the meta-resource model. In the proposed method, heterogeneous data is encapsulated in unified format of resource and binding with workflow so that data resources could be accessed according to the business process of manufacturing. Finally, case study shows that the resource-based data integration approach is more robot and flexible than traditional data integration method, especial under the environment of complex manufacturing.

Abstract: This paper presents the design principles for a large finite capacity scheduling system which takes into account alternative tools and machines. The system will produce tightly packed and stable schedules which in many cases will be close to optimal. The system can then be used as a platform for research into the application of decision making techniques, mathematical optimization, and other modern techniques.

Abstract: This paper proposes an opportunistic maintenance policy for the multi-unit series production system, which is on the basis of the failure rate analysis. When system halts for performing preventive maintenance or opportunistic maintenance, the alternative decision of replacement and repair is made by economic evaluation of two types of maintenance actions. The optimal preventive maintenance plans in a finite time horizon can be obtained by adjusting the preventive and opportunistic maintenance threshold. A numerical example is given for illustrating the applications of the policy.

Abstract: Because of cam transmited the specificity of force and motion,they are widely used in various machinery campaigns equipment and automatic control device in order to implement the movement of all kinds laws.This article introduced the research status and prospect of plate-type cam.MasterCAM served as a platform,to use their CAD capabilities and a mathematic analytic method to complete the parametric design of non-circular cam curve.Using the solid modeling completed the modeling function of cam.Using CAM functions of MasterCAM completed automatic generation of tool path,virtual simulation process and automatic generation of NC code.The design of the cam and CNC machining,high efficiency,sophisticated features that will help improve the manufacture of the cam quality,shorten product development cycles,lower production costs has a significant role for the formation of industrial scale production has great significance.

Abstract: To manufacture rapid metal tools, an innovative method based on rapid prototyping and high pressure spraying technologies is proposed in this study. The Sn-Bi metal alloy with low melting point and small thermal shrink was used as the spraying materials. Applying an electric heated device and high pressure boost pump, the melting Sn-Bi Alloy went through a small spray nozzle and atomized into semi-melting minute particles. The atomized particles are then deposited and integrated on the surface of intermediate silicone rubber mold, which is made from the rapid prototyping (RP) system and are successfully used to manufacture rapid wax injection mould. Using the thermal spraying system to manufacture rapid metal mold, the surface quality and the dimensional accuracy of the spray mold is excellent and the fabricated cycle time is short.