Key Engineering Materials Vols. 407-408

Abstract: In the course of present space lander’s optimization, the problems, such as hardness of information integration, partiality of optimization, still exist. In order to solve these problems, Lander Multidisciplinary Optimization Platform has been built. Four engineering tools (Pro/Engineer, Patran, Nastran, ADAMS) are integrated into the platform based on optimization software—iSIGHT, which could ensure space lander’s kinematics and dynamics characteristics. Good optimum scheme is obtained after comprehensive optimization of the platform. Besides, the platform is managed by simulation management software—MSC.SimManage. Multidisciplinary optimization can be realized automatically through parameterized interface of the platform.

Abstract: Design process of a machine tool is sometimes experience basis and time-consuming. The author has proposed a design tool for machine tools based on form-shaping theory and robust design technique. The tool can determine suitable configuration of machine tools, or important design parameters and error factors that affect machine tool performance, without prototyping. Especially in case of recently popular 5-axis machine tools, since the number of motion axis increases, there are huge options of axes combinations. It is difficult for machine tool designers to simulate the performance of every design option. Contrarily, the proposed design tool can clarify which design option of machine tool have better performance. In this paper, the tool is applied to the design of 5-axis machine tools. It enables to narrow the selection and make the design procedure more efficient. It also tries to suggest where the rotational motion axes should be placed. Finally, it is concluded that the design tool is effective in supporting configuration design of 5-axis machine tools structure where design knowledge has not been completely established.

Abstract: An agile data service framework was proposed in the paper to meet the requirement of agile manufacturing data management in product lifecycle management. The framework was comprised of four layers: core object and ontology layer, meta-data and meta-mode layer, service component layer and implementation layer. The realization of agile manufacturing data management was investigated through the analysis of the unified manufacturing data modeling and the implementation based on services. The descriptive structure and the main content of the manufacturing data model was given. The architecture of the manufacturing data management system based on services was addressed to conduct service implementation of the framework. The proposed approach of agile data services brought forward a new feasible solution to agile data management throughout product lifecycle.

Abstract: By taking the advantages of RFID (Radio frequency identification) technology, this paper consequently raises an idea of applying RFID into MES (Manufacturing Execution System), establishing the modules concerning MES onsite-material management and monitoring of manufacturing, and studying how to construct Intelligent MES.

Abstract: In milling pocket corner, there maybe residual material left at sharp corners when stepover is extremely large in contour-parallel toolpath. This paper describes an improved pocket toolpath by inserting biarc transitions segments in contour-parallel toolpath. When reaching the sharp corner, the cutter moves along the biarc transitions toolpath so that the corner material is removed. The efficient toolpath is continuous for clearing residual material at sharp corner. Milling test has been conducted to demonstrate and verify the significance of the proposed method.

Abstract: To satisfy the requirement in blisk machining, a barrel-ball milling (BBM) cutter suitable for machining both blade and hub is presented in this paper. The selection of cutter parameter and calculation of cutter location were put forward. The new efficient machining cutter location via the advanced optimization on cutter machining strip width was gained. By the numerical simulation of blisk blade machining, the feasibility of the BBM cutter and cutter location strategy were verified. The result showed that the efficiency of this method was increased to more than three times compared to the machining with a ball cutter.

Abstract: To effectively realize the optimal operation target of paperless production, real time production and integration in manufacturing process for workshop manufacturing system, this paper puts forward an equipment integration-based workshop e-Manufacturing execution mode, and analyzes the basic elements for the operation mode. Furthermore, some of the key issues which are important to support the operation mode are described in detail, including system integration technologies, equipment integration-based real time data collection and information interaction technologies. Finally, the operation mode is applied in a NC workshop of an automobile part manufacturing enterprise in Chongqing, and its feasibility is demonstrated.

Abstract: To effectively realize the business integration and collaboration in manufacturing enterprises, this paper provides an e-Enterprise framework for manufacturing enterprises and has a deep study on the application system integration mode and implementation technologies based on flexible information integration approach for e-Enterprise. With the flexible information technology, the integration between information systems transformed into the integration between adapters which dependent on the data itself and unrelated to the concrete information system, which helps the information systems to integrate with each other agilely on demand. Furthermore, the integrated operation mode of e-Enterprise in manufacturing enterprises is deeply studied. Finally, the e-Enterprise framework and operation mode is applied in an electric appliance set manufacturing enterprise in Chongqing, and achieves well application effects.

Abstract: Though solid modeling becomes essential to research present CAD systems, a great many small companies still use 2D CAD systems. So, automatic conversion systems between them have been desired for many years. Most of proposed methods could apply to only correct 2D drawings in geometry. However, simplified drawings are usually used in actual design. In our method, the relationships of lines in 2D drawings could be acquired as properties. So, when a user operates broken lines to make correct lines, the processes of operations can be learned and generalized by using the properties, and generalized processes can be applied to new broken lines of 2D drawings.

Abstract: To grind sculptured surface by swing motion, it’s needed to interpolate the discrete data nodes on the arc-driving surface. To ensure that all the sample points locate on the arc surface, a novel unfolding parameter curve is proposed. Firstly, all the discrete data are stretched onto a plane, inside which the cubic B-spline curves are interpolated. After that, some points are sampled from the spline curves and bended to the arc-driving surface according to the swing radius. To eliminate cutting vibration and chord error exceeds limitation; radial speed is tuned by controlling the chord error. The simulation results are given to prove the proposed algorithm.