bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Process of Particle Impact on Curved Surface of Vane by Finite Element Method
Authors: Yang Xiao Jing , Chi Yi Lin , He Guan Zhang
Published: October 2010

The process of particle impacting and contacting curved surface of vane was studied, and the characteristics of particle size, particle initial velocity and its impacting direction affect the stress of subsurface were analyzed by using ANSYS/LS-DANY software. It is shown that the interaction between particles and surface of vane is affected by nonlinear factors such as the elastic-plastic property of material, the state of impacting and contacting and surface shape. The increment in particle size increases the stress of the surface impacted and the sphere of action is also enlarged. The influence of the size of particles is remarkable. Particle impact velocity is related to energy exchange and has influences on stress value and the area of surface deformation. Due to impact angle is related to shape of curved vane, so the distribution of stress is changed and the value of the stress in surface layer is also influenced when particles impact curved surface of vane from different directions. The research will be helpful to disclose the mechanics of the wear on the condition of particle impact.
The Optimal Design of Multi-Level Planetary Gear Reducer
Authors: Wu Jing Bing , Shu Lun , Cheng He Ming
Published: October 2010

Based on the analysis and study of the composite reducer, the allocation of transmission ratio is considered to be the key to optimal design of multi-level planetary gear reducer. In view of so many discussion and study of the minimum volume as the optimization objective existed, this paper regards the maximum load capacity as the optimal goal on condition that the center distance or size is given, and then establishes the optimal mathematical model. The related constraints are given according to the theoretical knowledge and practical design experience. In this paper, an optimal function procedure that based on genetic is used to optimize the mathematical model. The satisfied result has been worked out combined with the practical example. Compared to the original program, the load capacity of 17.8% is improved. In addition, some references are provided to the optimal design of planetary gear reducer.
A Method of Three-Dimensional Modeling Based on Voxel Code
Authors: He Ai Dong , Ye Bang Yan
Published: October 2010

This article proposes a method of three-dimensional modeling based on voxel code, which can build three-dimensional model by means of cubic voxels and Voxel code. Voxel code is the one that records the formation of physical location of the voxels piled up in turn order in the body. The different Three-dimensional shape can be constructed according to different codes. In order to reduce the storage overhead of the code, the linear octree coding and decoding are given in recording voxel code. Combined with VTK (Visualization Toolkit) programming, some voxel models have been visualization. The modeling idea and method proposed in this paper have a positive significance for the promotion of the research and development of related science fields and have their theoretical and practical value.
A Nonlinear Mathematical Model for Turning Parameter Optimization Based on Minimum Production Cost
Authors: An Li Bao
Published: October 2010

Cutting parameters including cutting speed, feed rate, depth of cut and the number of passes have significant influence on both machining quality and machining economics. Cutting parameter optimization involves optimal selection of a combination of these parameters. It is an essential part of a computer-aided manufacturing system. In this paper, an optimization model based on minimum production cost for multi-pass turning operations is developed. Various realistic machining conditions and machining requirements are incorporated in the model as constraints. Optimal solutions are found by a nonlinear programming solution approach. A turning example is presented to test the model. Compared with the literature and the cutting regimes recommended in machining data handbook, our model and solution method are simple and generate much lower unit production costs.
An Algorithm for Generating Multi-Axis NC Machining Tool-Path on Scattered Point Cloud
Authors: Sun Dian Zhu , Liu Jian , Li Yan Rui , Niu Zong Wei
Published: October 2010

To achieve the accurate duplication of product in reverse engineering, we proposed an algorithm for generating multi-axis NC machining tool-path directly based on scattered point cloud. At first, we obtained the neighborhoods of tool-path section based on the dynamic spatial index of scattered point cloud and from which we selected the matching points. Then the tool-path section points can be obtained through intersection of the tool-path section and the lines which link the matching points, and the normal vectors of tool-path section points can be calculated based on the differential geometry property of local reference data. Finally we computed the cutter location points by means of projection method and sorted them based on the minimum spanning tree algorithm to form the tool-path. With the results of several experiments, the high precision and efficiency of this algorithm are verified.
Principal Curvatures and Cutter Location Calculation of Six-Axis CNC Abrasive Belt Grinding Machine
Authors: Wu Guang Ling , Zhang Qiu Ju
Published: October 2010

A six-axis CNC belt grinding machine automatic programming technology was studied in this paper, and which used D-H rule to solve out five-axis motion variables (the DOF of A, B, X, Y, Z), then discussed the problem of maximum contact degree between the grinding wheel and contact surface, and solved out the C-axis motion variable (the sixth DOF) by the direction of principal curvature in each cutter location point, after that gave a modified method of C-axis motion variable to smooth the machining. In order to ensure the machining accuracy while improving the machining efficiency, the paper summarized the self-adaptive spacing and step distance calculation method. The results which verified by a simulation analysis were validity and reliability, and provide a new thinking and beneficial reference for the research of other similar NC programming technology.
Stab Resistance of Thermoset-Impregnated UHMWPE Fabrics
Authors: Wang Dong Ning , Li Jia Lu , Jiao Ya Nan
Published: October 2010

The stab resistance of thermoset(TS) impregnated, woven UHMWPE fabric with additional steel fabrics was investigated under dynamic stab testing conditions. Vinyl-ester resin was coated on the UHMWPE fabrics with hand lay-up process to fabricate the composite and the mental fabrics were laminated on the composites. Dynamic stab testing of targets was based on GA68-2008 for stab resistance of body armor. Six uniform specified knives impactor were used for testing. And the samples are found to present significant improvements in stab resistance (knife threat) over neat fabric targets of equal areal density. Photographs show that resin primarily reduces the mobility of yarns and enables them to stop the knife penetration more effectively in the damage zone. These results indicate that the penetration of knives through such multilayer fabrics is effectively prevented and the process could be used to fabricate flexible body armors that provide improved protection against stab threat.
Research on a Platform for Developing Virtual Prototype of Automatic Transmission
Authors: Xiao Jiu Mei , Wang Xian Kun , Lei Jiao , Lai Qing Nan , Sun Jia Jun , Lou Yan
Published: October 2010

Based on analyzing the shortcomings of the current product development mode and methods of the automatic transmission, and on the principle of virtual prototype technology(VPT) and the thought of business process re-engineering (BPR), a concurrent development flow model suitable for virtual automatic transmission prototype(VATP) was established. The function model and the architecture of the platform for developing the VATP were also described in detail. Finally, the ideas for solving some key technological problems faced during implementing the platform were discussed in this paper.
Key Technologies of the Customization Product CAD/CAE Integrated Analysis System
Authors: Wang Yun Xia , Ni Xiao Yu , Wang Zhi Liang
Published: October 2010

On the basis of scale-based modular product family design method, the customization product CAD/CAE integrated system was studied under mass customization environment. The system divides into three parts including programming, design and evaluating process. First of all, product family model was built during programming process, which includes functional model, principle model and structure model. Then based on the product family model database, in accordance with the theory of variant design, using parametric CAD re-development technology, specific product satisfied by client customizes rapidly. Finally utilizing finite element analysis to analyze and evaluate the customization design, the customization result will be more reasonable and high efficiency.
Extending Activity Overlapping Model Based on Design Structure Matrix
Authors: Chen Ting Gui
Published: October 2010

Due to shortcomings existing in traditional overlapping model, a new extending activity overlapping model based on design structure matrix considering rework and iteration during activities execution is proposed in this article. Firstly, a tradional overlapping model presented by others is introduced. Sencondly, it is expanded to apply to more general situations using design structure matrix. Subsequently, an example deriving from a certain product development process is used in order to illustrate its effeciency and effectiness
Semantic SOA for Missile Design
Authors: Song Xiao , Li Jia Jia , Zhang Lin , He Dong Jing
Published: October 2010

Currently, Service-Oriented Architecture (SOA) is widely used in various fields, but a shortcoming is that the process of service discovering and matching is limited only to syntactic level which easily leads to information mismatching. In this paper, we propose semantic SOA for missile design system, which introduces SOA to missile design area. The semantically improved system uses ontologies to define semantics among services and integrates isolated information. Moreover, we describe services in a way combining WSDL and tuple description method together which enables automatic service discovery and matching. At last, we discuss the concept of "semantic template" that allows service requesters to create a semantic rich description of services.
Research on the Relationship between Virtual Manufacturing and Digital Factory
Authors: Qi Er Shi , Li Hui , Liu Liang
Published: October 2010

This paper analyzes the relationship between virtual manufacturing (VM) and digital factory (DF), in order to distinguish the two concepts. Based on the thought of PLM (Product Lifecycle Management), compare with the definition of VM, the paper gives the definition of DF, and analyzes the category and system characteristics of DF from narrow and broad point of view. The structural relationship and operation mechanisms of VM, narrow sense DF and broad sense DF are analyzed from the perspective of functional integration. During the phase of system implementation, from the perspectives of key technologies, implementation contents, implementation characteristics and important objectives, the characteristics of the three modes of production are summarized, the conclusion of system implementation under the condition of existing technology is obtained, and the potential application of narrow sense DF is researched.
A Haptic-Based Approach for Cable Design and Routing in Industrial Complex Products
Authors: Sun Gang , Xia Ping Jun , Li Yuan , Yi Wang Min , Huang Lei
Published: October 2010

Cable design and routing is a time-consuming and costly process for industrial complex products, traditionally it is finished by experienced engineers through soft lead or aluminum wire fitting in physical models, or by automatic or semi-automatic computing method in CAD system, but both with little success. In this paper, a new haptic-based interactive method is proposed. After rigid product models are loaded from CAD system, a geometry modeling method is used to represent cable shape, a physics modeling method for calculating cable deformation, and a haptic modeling method for interaction and force feedback. In this prototyping system, the user can define cable position and path, change its shape and size, and then simulate the design and routing process with haptic to feel the touch, collision and force feedback.
Integration of Multi-View Data Based on Auxiliary Reference Plane
Authors: Lin Ke Wei , Liu Xin , Duan Ming De
Published: October 2010

The integration of multi-view data in the acquisition of complex surface is researched by using the CMM (coordinate measuring machine) and the laser tracking scanning system. A multi-view data integration method based on the auxiliary reference plane is presented. With the precise auxiliary reference plane, the data measured by the different measuring devices and measuring views are aligned and the accuracy is analyzed. If the error is controlled in a certain range, this method can satisfy the demands of the model and assembly. The problems of low-efficient and low-accuracy in the data fusion of complex surface during the reverse engineering are solved. Meanwhile, the advantages of the different measuring devices and measuring methods are developed. This method has been applied to the reverse engineering development for a motorcycle cover model. The practical result shows that this new method is feasible and efficient.
Improvement of Vehicle Crashworthiness for Full Frontal Impact Based on Energy Flow Analysis
Authors: Wang Hong Lei , Xiang Dong , Jiang Li Feng , Duan Guang Hong , Zhang Hong Chao
Published: October 2010

Vehicle crashworthiness is one of the most important indicators to assess the automotive performance, which is directly related with passenger’s life and safety. Therefore, more attention has been paid to improve the automotive passive safety. This paper presents the analysis method based on energy flow analysis to solve the automotive crashworthiness problem. The energy transfer model is built based on the constraints analysis for product performance and the rational energy flow element partition. According to the energy transfer model, the energy absorption of each component can be attained from the finite element crash simulation result and also the energy distribution relationship can be analyzed. Based on the analysis results, the full front impact crashworthiness of a car is improved by modifying the energy flow path and distribution. It also demonstrates that the method is effective to solve the automotive crashworthiness problem.
Stress Analysis of Composite Material Embedded with Optical Fiber Sensor Subjected to In-Plane Shear
Authors: Her Shiuh Chuan , Yao Bo Ren
Published: October 2010

Optical fiber sensor with small size, light weight and immunity to electromagnetic interference can be embedded and integrated into the host material to form an ideally smart structure system. One must recognize that optical fibers are foreign entities to the host structure, therefore will induce high stress state in the vicinity of the embedded sensor irrespective of the small size of the fiber. To address this concern, present paper focuses the attention on constituent interaction between the optical fiber, coating, matrix and host material. An analytical model to predict the stress fields in the vicinity of the embedded optical fiber is presented. The theoretical development is based on the four concentric cylinders model which represents the optical fiber, protective coating, matrix and host material, respectively. The host material is considered to be a composite with reinforced fiber parallel to the optical fiber. In this investigation, the host structure is subjected to in-plane shear loading. The effects of the coating and host material on the stress distribution in the vicinity of the embedded optical fiber are presented through a parametric study.
Study on a New Method of Cleaner Process Design and its Application
Authors: Liu Ying , Xu Yan Fei , Huang Ran
Published: October 2010

Cleaner production, a new manufacturing mode, is the inevitable choice for enterprise to achieve sustainable development in low-carbon economy era. Cleaner process design method is guided by the thought of cleaner production. The method, under the premise of product quality, comprehensively considers factors like resources, environment, productivity and cost, and optimizes the steps and content of process, then develops a resource efficiency cleaner process for transformation of raw materials to products, which has little influence on environment. By adopting modern quality design technology, and introducing ‘House of Environment’ into the cleaner process design as an analytical tool, this paper presents a detailed discussion on cleaner process design method based on the principle of ‘House of Environment’ with an example to illustrate the points.
An Efficient IT Energy-Saving Approach Based on Cloud Computing for Networked Green Manufacturing
Authors: Ren Lei , Zhang Lin
Published: October 2010

Networked manufacturing technology has provided an effective approach to integrating manufacturing resources over Internet. However, a vast number of resources involving networks, computing, and storage resulted in ever increasing energy consumption. This paper proposed an IT energy-saving approach based on Cloud Computing for networked green manufacturing. The paper first presented the architecture of networked green manufacturing on Cloud Computing to support service-oriented IT resources outsourcing. Then the paper discussed the dynamically-scalable resource utilization mechanism for networked manufacturing. The approach can provide effective support for manufacturing resource virtualization and deliver a variety of services to distributed manufacturing enterprises. Moreover, IT resources of network, computing, and storage can be shared concurrently and scheduled dynamically that are adaptive to practical resource demand of collaborative manufacturing tasks. Thus, a great amount of IT resources can achieve high efficient utilization in networked manufacturing and result in reduced energy consumption to benefit green manufacturing.
Experimental Study on the Applicability of Minimum Quantity Lubricant Grinding
Authors: Meng Guang Yao , Tan Ji Wen , Cui Yi
Published: October 2010

Grinding is often to use the grinding fluid because of the high temperature in the grinding area. During the process of grinding, which is used traditional way of grinding fluid supply, gas barrier layer which around high-speed rotary wheel impeded effective grinding fluid into grinding zone, so it creates huge waste and pollution. Minimum quantity lubricant (MQL) grinding as a way of Green Manufacturing is proposed in recent years. So far, the problem of MQL can be applied in grinding has not been confirmed. In this paper, the applicability of MQL in grinding is studied by comparing the experiment of traditional grinding fluid supply method, minimum quantity lubricant grinding method and dry grinding method, and this study is based on theoretical analysis of minimum quantity lubricant grinding.
Tube Bus Corona Optimal Design of HVDC Converter Substation
Authors: Xu Ming Ming , Li Ke Jun , Niu Lin , Liu Min , Guo Zhi Hong
Published: October 2010

The corona characteristic of HVDC tube bus is the main factor taken into account for choosing tube bus of HVDC converter substation. The intension of corona could affect the electromagnetic environment of converter station and generate audible noise. By establishing the calculation models of electric field strength along the tube bus surface and the electric field strength on ground, the paper computes the corona onset voltage gradient and gives the relation curve of high and electrode spacing of tube bus. If the tube bus in HVDC converter substation is installed at the high and electrode spacing, got by the relation curve, it will not generate corona and its electric field strength will meet the requirements. The control indexes of tube bus corona characteristic parameters for HVDC converter substation are confirmed in combination with calculation results and related standards. Based on the control indexes, the paper gives the collocations of different tube bus types.
The CBR-Based Green Design Evaluation System for Mechanical Products
Authors: Niu Qin Zhou , Fu Yan Fei , Wang Zhi Guo , Hong Feng
Published: October 2010

In order to protect the environment and save resources, as well as to improve the green design level of mechanical products, an evaluation indicator system for green design is called to be established. After Referencing the existing evaluation principles and objectives to propose green design evaluation indicator system of mechanical products, the idea of case-based reasoning (CBR) is used to construct the indicators library. Also, the method of cluster is utilized to subdivide the library, aiming to optimize the indicator library and to improve the accuracy of evaluation in the process of constructing the indicator library. Finally, a CBR-based indicator library was constructed.
Rolling-Plowing-Extrusion of Outside 3D Integral Fins on the Stainless Steel Tube
Authors: Zhang Xiao Xia , Tang Yong , Wan Zhen Ping , Tao Su Lian
Published: October 2010

A new method of rolling-plowing-extrusion is proposed for fabricating outside 3D integral fins on the stainless steel tube. The fabricated process of fins is divided into two stages, rolling and plowing-extrusion, at first ribs are obtained on the stainless steel tube by the rolling process, and then 3D integral fins are obtained by the plowing-extrusion process. In this study, the principle of the rolling-plowing-extrusion is briefed; rolling process and plowing-extrusion process are analyzed, respectively. Through the experiments, the effect of technical parameters on fins forming and structures is investigated; experimental results are shown that accurate matching technical parameters and plowing tool angles is the key to the fins forming and structures; further analytical results indicate that when rolling speed and plowing speed is 50r/min, rolling feed rate is 0.16 mm/r, rolling depth is approximately 0.80-1.00mm, plowing feed rate is above 2.16mm/r, plowing depth is approximately 0.25-0.45mm, the optimal fins are obtained
Application of Multidisciplinary Design Optimization Based on Approximation Model to Marine Supercharger Turbo
Authors: Li Lei , Lv Zhen Zhou , Ao Liang Bo , Yu Ming , Yue Zhu Feng
Published: October 2010

In this paper, the multidisciplinary design optimization based on Approximation Model for supercharge turbo is studied. Temperature and pressure loads are transferred to the solid model by distance-weighted function, and structure deformation is transferred to aerodynamic model by mesh regenerated method in order to avoid mesh aberration. The Multidisciplinary analysis (MDA) model of supercharge turbo considering aerodynamic, heat transfer, strength and vibration is obtained on the basis of information transferring, which is solved by iterated three times. The Kriging Approximation Model which fits the sample space accurately is employed in the MDO process to reduce computational cost. Results show that performance of supercharge turbo is improvement on the MDO system based on Approximation Model, meanwhile the computational time of the optimization system is saved. Also, this method is suitable for other Multidisciplinary Design Optimization problems.
Bend-Twist Coupling Design and Evaluation of Spar Cap of Wind Turbine Compliance Blade
Authors: Liu Wang Yu , Zhang Yong
Published: October 2010

The bend-twist coupling design method of spar cap of 1.5MW wind turbine blade made by biased hybrid fibers is discussed, and the coupling parameter is established. It is found that flap-twist coupling effect is only related to the laminated materials, not sensitive to the geometry shape. When varying the angle of off-axis carbon fibers from 7.5° to 30° and the volume fraction from 10% to 90%, different bend-twist coupling effect can be obtained. The results show that the optimal angle of spar cap is closer to 18°, and of skins are about 13°. When constraints, such as fibers strain, the in-plane shear stress and Von Mises stress of static index, are added on the blade, the spar cap is optimized with about 45% carbon fiber volume fraction and 18° off-axis angle. Finally, the impact of natural frequencies of dynamic performance on the blade design is proved to be inessential.
Weight Reduction Design of Gear Drive Based on Parameter and Structural Optimization
Authors: Wang Ping , Lan Zhou , Shen Xiao Yang
Published: October 2010

. For a medium or large-sized gear drive, in order to achieve the optimum weight reduction effect, an approach of weight reduction design is proposed that multi-objective optimization of gear parameters is carried out firstly, and then structural optimization is adopted to design the gear former. The rational design parameters of a gear drive are determined by the multi-objective optimization with minimizing the sum of gear volumes and the equivalent moment of inertia of input shaft (EMI) synchronously. Conceptual design of the former is given by structural topology optimization of the gear, and the reasonability of topology optimization can be demonstrated by static and dynamic analysis. The results indicate that for a double-reduction gearbox of 500KW co-rotating twin screw pulping extruder, the EMI of the gear drive reduces by 20.88% through the multi-objective optimization of gear parameters, and the moment of inertia of a bull gear reduces by 38.86% through structural topology optimization.
Sintering Effects on LSCF Cathodes for Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFCs)
Authors: Muchtar Andanastuti , Hamid Noorashina A. , Muhamad Norhamidi , Wan Daud Wan Ramli
Published: October 2010

Solid oxide fuel cells (SOFCs) have been the centre of much research attention as these shows much potential in the generation of electrical power especially in terms of the high conversion efficiency of chemical energy to electric power. Recent research has been focused on a new material which is an electro catalyst for the oxygen reduction reaction in the intermediate temperature range (600-800oC). In this work, perovskite oxide which is a mixed ionic conducting material, La1-xSrxCo0.2Fe0.8O3-δ (LSCF) with x = 0.3-0.5 has been developed using the sol-gel method. The obtained powders were pelletized and sintered at different temperatures from 800 to1300oC. The sintered properties of the LSCF pellets such as density, porosity, grain size and shrinkage were investigated. A sintering temperature of 900oC was found to be the optimum temperature for the preparation of the LSCF cathodes in this study.
Optimum Design on Screw Parameters of the Twin Screw Pulping Extruder Based on the Extrusion Model
Authors: Shen Xiao Yang , Zheng Zhi Jun , Wang Ping
Published: October 2010

In order to enhance design reliability of a co-rotating twin screw pulping extruder (TSPE), optimum design on screw parameters of the TSPE was studied based on the extrusion model. The maximum shear flux or the minimum power consumption, or the two synchronous optimizations were taken as objective functions, and constraint conditions, such as thread lead, depth of thread, screw rotational speed, number of reverse thread lead, actual top width of the flight, torsional strength and stiffness of the screw mandrel, and so on were confirmed base on actual requirements of the TSPE manufacture and application. The optimizing results show that two-objective optimum design results split the difference of the two single-objective optimum design, and it is the most economical in reducing manufacture cost of the equipment and pulping expenses.
Green Scheduling and its Solution
Authors: Yu Jian Jun
Published: October 2010

Production scheduling is the key for the enterprise efficiency improvement, and is hot research topic for the advanced manufacturing all the time. Green manufacturing has become the inevitable trend, but environmental protection is ignored in scheduling research and in fact it’s very important. The concept of green scheduling is put forward and the definition of green scheduling is present. The difference between green scheduling and traditional scheduling is contrasted. The environmental effect and the resource consumption are synthetically taken into account, accordingly the index system of green scheduling is constructed and the model of green scheduling is set up. The resolution strategy with two steps is put forward for green scheduling. Pareto optimal solution set is firstly obtained, and then Pareto optimal solutions are evaluated and determined with the standardization and the entropy weight, and the satisfying solution is finally searched out.
Polymerization Craft of Wood-PSt Composite and its Performance
Authors: Fu Yun Lin , Li Yong Feng , Liu Yi Xing , Wang Bao Gang
Published: October 2010

A novel Wood-Polymer Composite, Wood-PSt composite combining both advantages of wood and polystyrene was fabricated by determining the polymerization craft of monomer in wood porous structure through impregnating monomer into wood pores and followed by in-situ polymerization through a thermal-catalyst treatment. The performance was examined, and its structure was also characterized by SEM and FTIR. The results indicate that the optimum polymerizing craft is: 80oC, 8h and 3% AIBN. Under the optimum craft, the mechanical properties involving modulus of elasticity and compression strength were linearly increased with content of polystyrene. SEM and FTIR show that styrene polymerized under the employed polymerization craft, and the resultant polystyrene relatively full generated in wood cellular structure, in accordance with the results of the optimum polymerizing craft. Such composite having good mechanical properties and biomass features can be widely used in fields of construction, traffic and furniture.
Laser Remanufacturing Technology and its Applications
Authors: Wang Wei , Liu Yong Xian , Xing Fei , Xie Hua Long
Published: October 2010

At present there are a lot of waste of energy in the mechanical processing, which causes increasingly serious pollution of environment. Resource conservation and environmental protection are achieved through the application of green manufacturing technology in mechanical processing. Remanufacturing project, which is a green project according with national sustainable development, is a method to resolve the waste of resources. Laser remanufacturing is a new concept of advanced repair technology that integrates advanced processing technology of laser cladding, laser cladding materials technology and many other technologies. Laser remanufacturing technology is based on laser cladding which is a new surface modification technology. This article describes the technical characteristics and principles of laser cladding. And this paper introduces laser remanufacturing technology by the examples of rotors, gears, shafts and other large wearing parts. the laser remanufacturing technology with the fast development, high efficiency and precision, will not only have a broad market demand, but also have significant economic and social benefits.
Research on Multi-Step Active Disassembly Method of Products Based on ADSM
Authors: Liu Zhi Feng , Zhao Liu Xian , Li Xin Yu , Zhang Hong Chao , Cheng Huan Bo
Published: October 2010

The electronic products continue to upgrade at present, how to recycle the discarded electronic products is one of the key research of green design. The method of active disassembly using smart material (ADSM) has acquired widespread concerns. For some products, there is a long distance between the internal active disassembly structure and shell, it needs a long time to reach to the stimulation temperature of internal active disassembly structure, and therefore, it is difficult to completely disassemble these discarded electric products by one step. Moreover, it is not conducive to recycling the material if the components and parts of the disassembly products are mixed together, and the efficiency of disassembly is very low. This paper puts forward multi-step active disassembly method of products, it gives specific procedures of classifying steps according to the principle of division, and it proves the feasibility and superiority of the multi-step active disassembly method of products by referring to mobile model.
Numerical Analysis for Thermal Performance of High Power Multi-Chip LED Packaging
Authors: Pan Kai Lin , Wang Jiao Pin , Liu Jing , Ren Guo Tao
Published: October 2010

Heat dissipation and cost are the key issues for light-emitting diode (LED) packaging. In this paper, based on the thermal resistance network model of LED packaging, three-dimensional heat dissipation model of high power multi-chip LED packaging is developed and analyzed with the application of finite element method. Temperature distributions of the current multi-chip LED packaging model are investigated systematically under the different materials of the chip substrate, die attach, and/or different structures of the heat sink and fin. The results show that the junction temperature can be decreased effectively by increasing the height of the heat sink, the width of the fin, and the thermal conductivity of the chip substrate and die attach materials. The lower cost and higher reliability for LED source can be obtained through reasonable selection of materials and structure parameters of the LED lighting system.
Application of Reverse Engineering Technology in the Green Remanufacture Engineering
Authors: Fan Wei , Liu Xin , Wang Wei Dong
Published: October 2010

The direct metal forming remanufacture system based on the arc welding and the reverse engineering technique is researched. A broken parts rapid recovery method combined reverse engineering and green remanufacture forming technology is proposed. The intact product and the damaged product should be measured separately, and compare the two groups of measured data to determine the accurate data of repair parts. So the damage position is definite accurately and the 3D model of the damage position is reconstructed by reverse engineering. According to the materials of repair parts and powder materials, the technological parameters are setting, the repair working scheme is proposed and the NC programs are prepared. And then the restoration and direct metal forming is carried out. The problem of accurate positioning during the direct metal forming is solved. The experimental results show that this method can repair the damaged parts accurately.
A New LCA Method Based on Multi-Scenarios Coexistence
Authors: Wang Xiao Wei , Li Jian Feng , Li Jian Zhi , Zhang Rui Jun
Published: October 2010

Because of the simplification for scenario choices and few reflections of space-time characters, product designers or police makers can’t reference effectively the results of LCA. This paper proposed a new LCA method for design scheme based on multi-scenarios coexistence. First, various life-cycle scenarios of product are summarized and the common attributes are extracted to generate the scenario model. Second, the choice matrix of multi-scenarios is founded based on product statistic. And the probabilities of scenarios calculated from the choice matrix are used to gather together the environmental impacts of multi-scenarios in proportion. Third, the inventory data are collected as per scenario including pollution emissions and character information. The later are used to generate personnel, spatial and temporal factors which reflect the diversity of environmental impacts in different scenarios. Finally, the related issues are discussed including matters needing attention in practical application and what need to research in future.
Human-Computer Collaborative Service Composition for Service-Oriented Manufacturing Integrated Systems
Authors: Wang Bao Lu , Zhang Lin , Luo Yong Liang , Zhang Qi Cheng , Guo Hua
Published: October 2010

In view of the characteristics and difficulties of service composition, taking particularities of enterprise product design and manufacture into consideration, in order to improve the efficiency of service composition for manufacturing integrated systems, a collaborative semantic web service composition framework based on abstract business process was proposed to construct the workflow by way of man-computer collaboration, and the key technologies involved in this framework such as service modeling, searching, binding and execution were analyzed in detail.
Research on the Measurement Method of Flexibility of Resource Service Composition in Cloud Manufacturing
Authors: Guo Hua , Zhang Lin , Tao Fei , Ren Lei , Luo Yong Liang
Published: October 2010

In order to overcome the bottlenecks of traditional network manufacturing, a new service-oriented networked manufacturing model, i.e. the cloud manufacturing (CMfg), was proposed recently. As an effective method for the realization of the added value of manufacturing resource, resource service composition (RSC) plays an important role in the implementation of CMfg. In view of the issue of dynamic changes occurred during RSC in CMfg, this paper presents the concept of flexibility of RSC as well as the idea of optimal-selection of RSC based on flexibility, which can enable RSC to have the ability to adapt to the dynamic changes. Meantime, the measurement method of flexibility of RSC is investigated. The optimal-selection of RSC based on flexibility can be achieved through quantitative evaluation of flexibility.
Research on Case-Base in Semantic SOA Integrated System
Authors: Zhang Qi Cheng , Zhang Lin , Luo Yong Liang , Wang Bao Lu
Published: October 2010

Experience accumulation and reuse are very important for manufacturing of complex product. However, there is no mechanism to support such function in the integrated manufacturing system based on semantic SOA which is generally accepted as an effective approach to raise productivity. Specific to this problem, we propose a solution by building a case-base in semantic SOA to improve the traditional framework, in which case-base can accumulates the experiences by case study and reuse them by case retrieve. In this paper, the new architecture and workflow of the semantic SOA with build-in case-base is designed, merging and maximizing the advantages of both case-base and SOA to make up the lack of experience accumulation and reuse mechanism. Then, combined with field characteristics of complex products’ manufacturing process, construction and implementation concerning key technologies and methods of case-base are comprehensively elaborated.
A New Data Reduction Algorithm with Preserved Features
Authors: Shi Bao Quan , Liang Jin , Liu Qing , Xiao Zhen Zhong , Zhang Xiao Qiang
Published: October 2010

This paper presents a new data reduction algorithm to reduce redundant in rang image or three dimension point cloud. Firstly, an automatic subdivision program is developed to identify the most representative data points among redundant points. The subdivision program employs the standard k-means clustering procedure to gather the similar data points together in spatial domain and uses the max normal deviation to minimize the dissimilarity in feature field. Secondly, an automatic boundary detection algorithm is developed to maintain the integrity of the border, which is conducted before the subdivision program. To avoid the final distribution of sampled points locally greedy and unbalanced, a refinement algorithm is proposed, which runs after the subdivision program. The effectiveness of the proposed k-means clustering data reduction algorithm is demonstrated through the simplification results of the practical range image and three dimension point cloud.
On the Topology Optimization Design for the Stereolithography Based Investment Casting Model
Authors: Zhu Ji Hong , Zhang Wei Hong , Gu Xiao Jun
Published: October 2010

The purpose of this paper is to avoid the crack problem of the ceramic shell during the burnout procedure of the rapid investment casting using stereolithograghy (SLA) model. Since the coefficient of thermal expansion of the SLA model is much higher than the coefficient of the ceramic shell, the internal structural patterns have to be properly designed to reduce the stress level in the ceramic shell. A topology optimization method is proposed here to find better microstructure designs to satisfy both the strength of the ceramic shell and the stiffness of the SLA model itself. Taking the arrayed microstructure into account, the pseudo-densities of the SLA model elements to describe the material layout are defined and assumed as the design variables. By deriving the design sensitivities, the topology optimization problem is solved with reasonable numerical results generated.
Acquisition and Analysis for Customer Requirement Information
Authors: Xiao Zheng , Liu Quan , Ai Qing Song
Published: October 2010

This paper summarized the popular methods for acquiring customer requirement (CR) information, where the internet-based method is especially efficient when an enterprise's web possesses the function of real-time communication, guiding investigation and online experience. However, current classification and analysis of CR mainly depends on a subjective judgment, awareness and assessment of the enterprise's staff, which exists with human errors. From the point of view of CR information, the authors classified it into certain information and uncertain information; there are two types of uncertain information----the random and the fuzzy. Based on this classification, CR information can be analyzed by means of probability theory and fuzzy logic. Therefore, the enterprise will acquire CR information more effectively and analyze it more accurately.
A Discrete Part Oriented Collaborative Manufacturing Service Platform Based on Agent and Grid
Authors: He Yan Li , He Wei Ping , Zhang Wei
Published: October 2010

Collaborative manufacturing is gaining more and more popularity in the dynamic and global market environment, as raises the requirement of a platform to support the remote resource utilization and distributed process integration for the operation and management of collaborative manufacturing. This paper combines agent and grid workflow technology to construct an integrated application service platform for collaborative manufacturing of discrete part. The grid service is used to encapsulate technological resources to be accessible remotely, while the agent technology is integrated with grid service to encapsulate resources such as machine tools which require local human operation. Grid workflow is applied to model and enact the overall manufacturing process and invoke appropriate grid services dynamically so that manufacturing tasks can be executed in a controlled and distributed manner. Issues of system framework, resource encapsulation and process enactment are discussed, and a case study is present to demonstrate the feasibility.
Determining Structural Modes of HSK Tool System Based on FEM and EMA
Authors: Shen Chun Gen , Wang Gui Cheng , Wang Shu Lin , Liu Gang
Published: October 2010

In this research, we computationally analyzed the structural modes of an HSK63E type tool system and verified the results with experimental modal analysis (EMA). The computation was implemented using the finite element method (FEM) based on a linear-elastic theory, with which we computed the natural frequency and obtained the modal shapes under both free and operating conditions. With the method of experimental modal analysis, we also obtained structural modal parameters including the natural frequency, modal shapes and damping ratio under the same free and operating conditions. The computational data were compared with the experimental findings. The reasonable agreement between the two data sets indicated the validity and provided a theoretical basis for using computational methods for determining the natural characteristics and influencing factors of HSK tool system. With this validated FEM model, further analyses were performed to evaluate the unique dynamic performance of the HSK tool system, and to apply dynamic optimum design to other types of HSK tool system.
A Method for Problem Selection in the 6σ Definition Stage
Authors: Yang Ming Shun , Li Yan , Liu Yong , Gao Xin Qin
Published: October 2010

6σ has proved numerous times that it can help any business to deliver products to meet or even exceed customer expectations. DMAIC (Define – Measure – Analyze – Improve - Control) is one of the Six Sigma methodologies used for a 6σ project that aims to improve and control quality of exiting products. Aiming at the drawbacks existed in the problem selection in definition stage, considering the fuzziness and uncertainty of problem analyzing, a method integrating fuzzy QFD (Quality Function Deployment), frequency-cost FMEA (Failure Mode Effect Analysis) and gray relation analysis is presented, in which the customer requirements, occurring frequencies and the relative costs of the problems are taken into account comprehensively. Thus the key quality characteristics or process features to be improved are determined, which can provide decision support for key problem selection. An example is given to illustrate the effectiveness of the proposed method.
Optical and Structural Properties of ZnS Thin Films Grown by CBD Technique
Authors: Abdullah Huda , Saadah Nor Habibi , Shaari Sahbudin , Muchtar Andanastuti
Published: October 2010

Zinc sulfide thin films were deposited on optical glass substrates by using chemical bath deposition (CBD) technique that contain solutions of thiourea, zinc acetate, ammonia and sodium citrate. The deposition time were varied from 18 hours to 39 hours. SEM, XRD, and UV-Vis-NIR were used to characterize the sample which shows that the films are thicker and the grains sizes are bigger as the deposition time increases. X-ray diffraction (XRD) pattern prove that ZnS thin films are in disordered since it does not revealing any peaks and the surface of ZnS thin films are amorphous. UV-Vis spectra showed that the deposited ZnS thin films have more than 100% transmittance in the visible region and direct band gap of deposited films are in range of 2.45 eV to 3.53 eV. Time increasing of deposition will slightly decrease the transmittance of the film.
An Apriori-Based Knowledge Mining Method for Product Configuration Design
Authors: Yu Li , Chen Yun
Published: October 2010

Product configuration design is a knowledge intensive process during product development. It is a critical step as the cost and quality of a product is based on decisions made at this stage. In the iterative process of product configuration design, customers and design engineers use different terms describing products which often results in misunderstanding. Based on the historical transaction records of customer requirements and design parameters, this paper proposes an Apriori-based data mining method to transform the implicit knowledge into explicit association rules. Three criterions, support, confidence and interestingness, are applied for the evaluation of the extracted rules. The effectiveness of the proposed method is illustrated with a case study of electrical bicycles. The results show that that the proposed method can be a promising tool for product configuration design.