Advanced Materials Research Vols. 201-203

Abstract: With the features of large electromechanical products like high cost and limit quantity of manufacturing equipment, long processing cycle, uncertain returned repairing work, etc., a resource modeling method based on capability was proposed for supporting manufacturing process optimization. And, mainly from three aspects of resource that were capability, status transition and service cost, manufacturing resource was described in this model. An automotive process and automotive mapping of resource was supported by capability description of this resource. Moreover, how the resource status was changed with the changing of processing task was described in the status transition of resource. Then, when describing service cost, installing and unloading cost was considered as well as expense cost in unit time in order to support the situation analysis of changing tasks in the manufacturing process. So the optimization of manufacturing process of large electromechanical products in a dynamic resource environment was supported by the combination of these three aspects. Finally, combining with a concrete case about manufacturing of rotor which is a key component in steam turbine, the validity of this method was verified.

Abstract: Firstly, the idea put forward in this paper is Contemporary Integrated Manufacturing System (CIMS) environment needs the In-Process Models (IPMs) which are associated completely with the information of design and manufacturing. Then, establishment of IPM by means of boolean subtraction between blank and machinable area features. Finally, many examples of verifying the feasibility of this method are presented.

Abstract: Aiming at the requirements of CAD/CAPP data and function integration, adopted modeling based on feature, the part model design is accomplished through calling standard features in the feature database or user defined feature (UDF). The design feature model is reconstructed into a machining feature model through mapping rules. The information of machining geometric and machining properties is packaged in machining feature. CAD model does not provide all the information necessary for process planning, such as the materials information and the accuracy information. These must be provided manually. All information establishes reference of the shape feature. The machining feature, the processing method and manufacturing resources are correlated through establishing decision rules of process knowledge stored in a knowledge base, to realize the automatic generation of feature-based machining procedures and operations. A process-planning tree is constructed through matching the feature process tree with a typical process template, to realize the automatic generation of the part process route. A complete process document can be obtained by manually editing the automatically generated processing route. The feasibility of the method is verified by a prototype system developed in Pro/E environment.

Abstract: Integrating the Hall sensors to the extremity balance system of exercise and rehabilitation bicycles was developed and examined in detail. We have accomplished and manufactured a complete system which is user friendly, multi-functional, highly stabilized and inexpensive.

Abstract: This paper deeply studies the characteristics of process language and denotes the process operation language with predicate logic, in the purpose of simplified the generation of process operation language. Using data mining technology, we generalized and stratified the conception of the process operation language. Based on the binding mechanism, a high level model of process operation language was established. The paper has solved the problems in the universal structured generation of the process planning language, and achieved application success.

Abstract: Though analyzing the characters of the equipment management for process enterprise, there is a knowledge–based integrated equipment management system using knowledge management in order to maximize benefit, which emphasizes the technical reliability, enterprise capability balance and consists of equipment optimized control model, equipment operating cost model, equipment reliability evaluation model, equipment fault diagnosis model and equipment renovation decision support model, etc. The knowledge acquisition and representation model is aim to realize the decision-making flow of the process enterprise. A typical example is also presented to demonstrate the application of the integrated knowledge-based equipment management system.

Abstract: In manufacturing grid, trust management is the core component, which is associated with resource sharing, role assignment etc. How to compute and evaluate the recommended trust is very important for cooperation among resource entities coming from different domains. In order to resolve the problem, a two-layer domain structure is constructed to organize the distributed cross-domain cooperation and the corresponding trust value evaluation algorithm is designed based on the structure. At last, an application prototype is developed to show the validity and the practicability of the proposed method.

Abstract: The 3D assembly process planning and simulation system can improve the product manufacturing level in airplane manufacturing enterprises, but now there is few system of this kind. So we design a system named Digital Virtual Airplane Assembly Process Planning and Simulation System (DVA²P²S²) to improve the situation. Firstly, we design the system’s structure with data support, systems integration and functions development and user application as its three levels. Secondly, its running flow is introduced. Thirdly, two key technologies which are 3D digital assembly process structure and the method of automatic creation of simulation file are discussed. At last, we set a subassembly of an airplane to validate the DVA²P²S². The result shows that the DVA²P²S² is in accordance with the Concurrent Engineering’s requirements, and it can improve the work efficiency and reduce the process design iteration and cycle significantly.

Abstract: The conventional PWM converter topologies limit the operation to lower switching frequencies because of the minimum ON-time of the transistor switch. The quadratic feature is interesting for application where a wide voltage range is necessary, a quadratic buck-boost converter is presented. The converter cell is showed, the quadratic buck converter with the converter cell can convert to the quadratic buck-boost converter without increasing elements.

Abstract: Rapid manufacturing grid (RMG) is the application integration system of grid technologies on manufacturing, which can be used for manufacturing platforms, resource managing and sharing data among departments of manufacturing enterprise. In this paper, Rapid manufacturing grid architecture is analyzed. A three-tier Application Integration System of Rapid manufacturing grid is proposed to haring manufacturing resources in manufacturing process.