bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Error Separation Technique on the Virtual Detector of Gear Error
Authors: Cui Min , Deng Wei Yi
Published: June 2012

On the foundation of conventional double-flank gear rolling tester, a virtual detector of gear error taking personal computer as the core is developed with the use of virtual instrument technology. Systematic error is analyzed through error separation technique. The structure of the detecting system , the design of the system software based on LabVIEW, and the separation of different radial component deviations of gear are presented.
The Analysis of Garment Surface Accessory on Uniform Elements in the Modern Women’s Clothing Design
Authors: Wu Yong Wei , Chen Shu Cong
Published: June 2012

The military element is widely used as the design element of modern clothing in fashion design. This paper describes the uniform element from the aspect of application of uniform fabrics and uniform accessories.
Optimization Design of Loop Structure Assembler for Testing Based on Complexity Analysis
Authors: Zhang Wei , Du Dang Bo , Zhang Jian Xun , Xie Yun Yu
Published: June 2012

The program optimization design, based on the complexity analysis, is an effective way to realize the design object of the testing system for equipment, which includes its safety, reliability, portably, fastness etc. Take the loop structure assembler for testing as an example, debug software is run for debugging executable files generated from source programs with different algorithms respectively, and elements such as the memory allocation of machine code, the length of the machine code of programs with different algorithms and execution process of machine codes of different formal instructions with the same function are analyzed. The running time of executable files is also estimated when clock frequency and the average running speed of machine code per byte are determined. After the algorithm and instruction is optimized based on the space and time complexity analysis, the program optimization design is completed. The method of optimization design applied to testing programming provides reference for other software modules in testing system, as well as the overall improvement for use efficiency of the testing system software and memory space saving to reduce the number of memory boards.
The Hybrid Effect of Al and Cr in Zinc Bath on Galvanizing Coatings
Authors: Liu Ya , Su Xu Ping , Wang Jian Hua , Li Zhi , Tu Hao
Published: June 2012

The hybrid effect of Al and Cr in zinc bath on galvanizing coatings were studied by means of scanning electron microscope (SEM) and energy dispersive X-ray spectroscope (EDS), coupled with hot-dip galvanizing experiments. A new phase T1 was found in the coating, and the ζ phase was absent when hot-dip galvanizing at 480 °C. When Cr added zinc bath were alloyed with 0.1 wt.% Al, coating was composed of δ, ζ, η and T1 phases; when Cr added zinc bath were alloyed with 0.2 wt.% Al, δ phase layer became thinner, ζ changed from even layer to blocky crystals, and diffuse-Δ coexisted with the ζ phase. The morphology evolution of galvanizing coating was analyzed and the hybrid effect of Al and Cr were discussed with diffusion path theory.
Image Analysis on the Originality of Product Designing
Authors: Liu Li Li
Published: June 2012

Product originality is human’s cognition and development about the life essence, also the expansion of the life category, life value and improvement of the civilization. Taking the image of the product originality as the starting point, this paper makes analysis on the several characteristics of the image in the product designing. And finally, some new thought about the future development of the product originality are put forwards[1,2,3].
Intelligent Optimization Design of Rare Earth Lifting Permanent Magnet
Authors: Ding Ning , Zhang Ding Tong
Published: June 2012

To eliminate the disadvantages of the lifting electromagnet, the Rare Earth lifting permanent magnet was designed. The magnetic circuit intelligent optimization design was developed. Moreover, a perfect self-acting driving system has been invented. Industry prototypes were manufactured, and they verified that the developed intelligent optimization model is valid; the drive system is feasibility.
Study on New Escape Chute Device of High-Rise Building
Authors: Yao Yan Sheng
Published: June 2012

Safe escape in the fire disaster of high-rise buildings is a world-wide unsolved problem because of the complicated structure of the building and the huge amounts of resident. Nowadays the chute devices for escaping in high-rise building become important for collective escape, which is easy to use and runs at high speed without extra power. Rigid escape chutes and flexible escape chutes are introduced in this paper. The assembly of escape chutes and their disadvantages are discussed. For more function and more effective, a flexible multi-entrance escape chute with its store box is designed. This device offers a fire-proof, high temperature-proof and multi-entrance passage for collective escapes at the same time. Experiments of its prototype shows that this equipment can release escape chute in time, and bring evacuee more safety and escape efficiency.
A Framework for New Product Selection Decision Using Analytic Network Process and Knowledge Management
Authors: Wudhikarn Ratapol , Chakpitak Nopasit , Neubert Gilles
Published: June 2012

This paper aims to propose a new framework applying analytic network process (ANP) considering with three currently crucial perspectives; quality, environment and cost. At the same time of the ANP processes, a knowledge creation process and also knowledge evaluation method are considered for sustaining and measuring new emerging knowledge from proposed framework. This study provides a rational of this comprehensive framework and selected methods; those are ANP, eight quality dimensions of Garvin, life cycle costing (LCC), socialization, externalization, combination and internalization (SECI) model and Skandia model. All concerning methods are discussed and argued of their potential benefits and strengths delivering to the proposed framework.
Parametric Design of Cycloid Gear Based on SolidWorks
Authors: Lei Lei , Tao Ying , Guan Tian Min
Published: June 2012

In order to improve the efficiency and quality of design of complex parts, cycloid gear, in the pin-cycloidal transmission, this paper used SolidWorks to built accurately cycloid gear 3d model, and the VBA to program procedure for the secondary development, realized the parametric design of cycloid gear. Designer just enter the design parameters of cycloid gear , then gain the accurately generated cycloid gear 3d model rapidly , greatly improving the speed of cycloid gear design.
The Experimental Research of Non-Abrasive Cryogenic Polishing on Metal Cylindrical Surfaces
Authors: Qu Shou Ping , Liang Tian Zhu
Published: June 2012

It takes advantages of non-abrasive cryogenic polishing to polish the metal cylindrical surfaces in the paper. In cryogenic condition, the ice tool is produced by deionized water. The feed apparatus of the ice tool is also designed and produced. It is analyzed the influence of the ice tool material, metal material, rotate speed, polishing time and other parameters in the experiments.
The Multi-Scale Modeling Technique for Modular Variant Design
Authors: Liu Yang , Zhao He , Zhang Qiao Xin
Published: June 2012

Facing the modularization of existing product variant design requirements, this paper presents a multi-scale modeling technology. Discuss the process of the change scope of the parts and modules according to the needs of the user, so divide the modular product model into process model, modules model and parts model. Use associated hypergraph describe the constraint relation between different stages of modular design process, the process model provides network basis for user needs mapping. Use the structured hypergraph to conduct formal description of parts and modules information and establish structured model; then fuse constraint information of the structure model based on the multi-scale data fusion technology, and provide constraint data source for changed coefficients of the components and modules. Finally, the case analysis shows the scientific and practical of the method.
Rubber Conveyor Belt Vulcanizing Equipment Development Status
Authors: Tang Yue , Liu Gang
Published: June 2012

This article describes the classification of the conveyor belt vulcanizing machine, and a description of the structure and characteristics of the conveyor belt vulcanizing machine. Combined with conveyor belt manufacturing plant and curing machine, equipment status, and gives some insight on future innovation and development.
Research on Strategy of Grid-Side PWM Converter Based on Doubly-Fed Induction Generator
Authors: Zhang Wei , Ruan Yi
Published: June 2012

A mathematic model of the grid-side PWM converter based on Doubly-Fed Induction Generator (DFIG) has been investigated to analyze their operating characteristics. The control scheme to the grid-side PWM converter was presented. And the simulation model of the grid-side converter (GSC) based on DFIG energy generation system was built in Matlab / simulink software. The results show the feasibility and correctness of the control strategy.
The Research on Designing a New Artificial Ecological Sewage Treatment Technology
Authors: Liang Su Tao , Lu Jin Xi , Ji Jiang Hai , Gao Liang , Li Hong Wei , Liu Hong Quan
Published: June 2012

The research aims at a new technology of ecological waste water treatment, which can not only clean up in a high efficient to some inorganic element, such as N and P and etc, hold up pollutants in waste water efficiently, but also improve purification efficiency of unit volume of sewage by 32-46% and keep it functioning normally all year around.
Electric Bus Body Lightweight Design Based on Multiple Constrains
Authors: Wang Wen Wei , Zhou Cheng Jun , Lin Cheng , Chen Jiao Yang
Published: June 2012

The finite-element model of pure electric bus has been built and the free model analysis, displacement and stress analysis under bending condition and torsion condition have been conducted. Optimally design the pure electric bus frame based on multiple constrains. Reduce the body frame quality by 4.3% and meanwhile meet the modal and stress requirements.
The Application and Construction of Light Steel Roof Truss in the Hydropower Station Tunnel
Authors: Wang Xiao Ping , Zhan Qi Tao , Xu Jie
Published: June 2012

The hydropower station tunnel construction is crossover operation and environment is poor. Installation space and time are limited. The paper introduces corresponding measures and installation method.Through field investigation and vast demonstration, using electric hoist and little bridge machine in equipment assembly area can avoid the effect to power house equipment installation and reduce crossover operation time. Using installation platform on the little bridge in hydro-generator area can reduce the use of the little bridge machine and improve the installation efficiency .
Research on Development of Assembly Sequence Planning System Based on Knowledge
Authors: Xia Jian Sheng , Li Wei Wei
Published: June 2012

Using the second development tooling of NX/KF, joining the KBE system and back-propagation neural network (BPNN) algorithm, it can access the volume, weight, feature number and input the related parameters (contacting relationship number and total penalty value), predict the feasible assembly sequence, reduce assembly working time and production cost.
Structural Design of Prostate Biopsy Robot Based on TRIZ Theory
Authors: Zhang Yong De , Liu Feng , Yu Yan
Published: June 2012

In view of the problem of long period and low precision that generated by traditional prostate biopsy surgery at present, a special and miniature cartesian type robot for prostate biopsy was designed based on TRIZ theory, especially based on contradictory matrix and material-field analysis principle of TRIZ, therefore three-dimensional model of cartesian type robot of prostate biopsy was built, key components of the robot were designed by calculation .In conclusion the result indicates that the TRIZ theory can be applied to structural design of medical robot, and it also can solve the technical contradiction in design.
Optimal Design of Lower Extremity for Portable Human Exoskeletons Using Improved Particle Swarm Optimization
Authors: Liu Fang , Cheng Wen Ming , Zhao Nan
Published: June 2012

Portable powered human exoskeleton is directed at providing necessary support and help for loaded legged locomotion. The kernel of whole mechanical construction of the exoskeleton is lower extremities. The lower extremities consist of exoskeleton thigh, exoskeleton shank, hydraulic cylinder and corresponding joints. In order to find the optimal combination of design parameters of lower extremities, an improved particle swarm optimization algorithm based on simulated annealing is proposed. To improve global and local search ability of the proposed approach, the inertia weight is varied over time, and jumping probability of simulated annealing is adopted in updating the position vector of particles. Experimental results show that the improved algorithm can obtain the optimal design solutions stably and effectively with less iteration compared to the standard particle swarm optimization and simulated annealing.
Grain Growth Simulation of Precipitated Phase on Surface and Evaluation of the Residual Stress Distribution
Authors: Uehara Takuya
Published: June 2012

Grain growth simulations considering heat treatment process were carried and the change in microstructure on the surface was regenerated. Stress-dependency of the phase transformation from original phase to precipitate was introduced into the conventional multi-phase-field model, and stress distributions were calculated. Volumetric dilatation was considered as a source of the stress generation, and a slight variation in the dilatation coefficient was applied for each grain. As a result, a mosaic pattern in the stress distribution correlated to the polycrystalline microstructure was obtained. The residual stress distribution was also calculated under three different conditions, and revealed to vary depending on the microstructure obtained.
Topology Optimization and Analysis of Sub-Frame of 2500HP Fracturing Truck
Authors: Wang Xia
Published: June 2012

Sub-frame is an important component of 2500HP fracturing truck and the enough rigidity and intensity is necessary for chassis to undergo the large load on the off-road. After analyzing the topology optimization method, the var1ab1e density method is employed to analyze the intensity of the sub-frame. The layout and the location of the cross-member are determinated. Comparing to the old design, the result shows that the carrying capacity of sub-frame is improved 10.1% and the number of cross-member is decreased.
A Hybrid Metaheuristic for the Multiple Depot Vehicle Routing Problems with Mix Pickups and Deliveries
Authors: Li Jian , Lu Dong , Dai Ming
Published: June 2012

The multiple depot vehicle routing problems with mix pickups and deliveries are often met in real-life scenarios of transportation logistics, but it has not received much attention by researchers. In this problem, to allocate borderline customer to appropriate depot is a difficulty to overcome. In this paper, a genetic algorithm is supposed to allocate them. Then the tabu search algorithm is incorporated into the genetic algorithm to solve the single depot vehicle routing problems with mix pickups and deliveries. The proposed algorithm is successfully applied to benchmark instances in the literature, generating new best solutions.
The Application of Virtual Prototyping Technology in the Kinematic Analysis of Hydraulic Excavator Working Device
Authors: Chen Hai Hong , Zi Jian Ping
Published: June 2012

Three-dimensional software Solidworks and ADAMS were combined together to establish the virtual prototyping model of hydraulic excavator working device in this paper. Various real typical working conditions of excavators were simulated in the virtual environment, then kinematic simulation analysis was conducted, and the main mining parameters in different conditions were given, the results provide a basis for the design of excavator working device.
Probabilistic Approach for Cost Optimization of Structural Materials Using Plastic Hinge Mechanism
Authors: Son Kwang Ik , Kong Byung Seung , Jang Won Suk , Kim Hee Joong , Lee Hack Soo
Published: June 2012

In the seismic design, it is important to consider higher risks of damage under seismic design forces than under other general loads, such as live load, dead load, or wind load. Although the full strength of the structure can be developed to resist various types of earthquake forces with respect to increased safety factor, this design concept may be not appropriate when we consider the economic benefit since the design under the seismic force is normally 15 to 25 % more expensive than the design of elastic response. As a one of the seismic design approaches, plastic hinge mechanism has drawn an interest to ensure the economic design performance under the earthquake. In this paper, forecasted seismic motion was simulated using a Monte Carlo simulation to determine the seismic design load applied to the structure system. Then for each seismic load, the economical set of plastic hinge mechanisms was optimized using linear programming.
Research and Design on Aesthetics of Wood Grain
Authors: Xu Li , Li Da Gang , Xu Chang Yan , Xu Zhao Yang
Published: June 2012

From the study on the status of wood aesthetics, firstly through analyzing the macro grain of wood in three sections, the article indicates people’s aesthetic demand that the wood's natural grain meets the visual and psychological need of people. And then, it studies the wood microstructure by the principle of form beauty which makes deeper discussion of the wood’s microstructure grain on aesthetic form. Last, through graphics processing of the wood grain, it will produce some wonderful regular tessellation patterns and apply to the design of the product, which enriches the material library of modern graphic design, and expresses the significance of the research on wood aesthetics.
Application Study on Reverse Design Method in Tobacco Heights Department of Tractor Panel
Authors: Men Yan Zhong , Guo Yong Xin , Shuai Jun
Published: June 2012

Reverse design of the flue-cured tobacco Heights Department of tractor panel has been designed, using reverse engineering software, 3D laser scanning equipment and electron microscopy equipment, after the collected data such as pre-processing and surface reconstruction process, to get a tractor panel of tobacco Heights Department. The initial structural model, and associated structural re-design, research results show that the rapid establishment of a new product manufacturing system to improve new product quality and development efficiency has important practical significance.
Arts and Sciences - Talk about Self-Apparent of the Materials in the Design
Authors: Guo You Nan
Published: June 2012

The development, improvement, using of materials run through the history of human development and the process of designing is also the process of cognition, transformation for material in essence. Design of materials is not only lying in function, but also creating the beauty of opuses, to arouse people's associations as well as desire of using products. Materials play a core role, lying on how to choose the material and making self-apparent awake people's aesthetic emotion. This thesis analyzes the self-apparent of material in the design, and explains how to use the materials and their processing technology properly to create the great charm of the materials.
A Bio-Mechanical Designed Under-Actuated Hand and Force Control Schemes
Authors: Huang Hai , Jiang Shu Qiang , Pang Yong Jie , Li Jiang
Published: June 2012

In order to mimic the natural appearance, motion and perception of the human hand, a biomechatronic approach to design an anthropomorphic Under-actuated hand-HIT/DLR Under-actuated Hand has been presented. It reproduces human hand in its fundamental structure such as appearance, weight, dimensions and inertia. Its thumb can move along a cone surface in 3-D space. Similar with humans’, it combines with abduction and adduction from palmar position to lateral position. Actuated by only one motor, the mid finger, ring finger and little finger can envelop complex objects. Furthermore by applying dynamics model, the force-based impedance control can realize more accurate and stable force control during grasp. Experiments displays dynamic control can make the finger grasp with more smooth and precise trajectory and stable grasp force, these would be particularly helpful for the widely application of underactuated hand.
Research on Process Optimization of 560MPa Grade Sheet for Automobile Crossbeam
Authors: Ye Xiao Yu , Zhang Kai Hua , Li Wei Ping
Published: June 2012

In this paper, according to the problem of elongation unqualified in 560MPa grade sheet for automobile crossbeam in Pangang, through the microstructure detection、fracture observation and other methods to analysis the reason of elongation unqualified and propose process optimization measures. Used the measures, the elongation unqualified situation has obvious improvement in P560L, greatly improved qualified rate. The performance fluctuating range is small behind process optimization and have excellent forming properties and low temperature impact toughness. The users applied show that: products have excellent stamping performance, small rebound after stamping and stable quality. The various performances fully meet the used requirements of punch vertical frame in automobile.
A Development of Polarization Experimental Processes and Analysis Mechanical Behavior for COC and PVDF Films
Authors: Lin Chien Chang , Lai Feng Min , Yang Chen Mao
Published: June 2012

The paper is investigated the polarization properties and mechanical behavior of new piezoelectric polymer material plates by experimental procedures and finite element analysis. In this study, the PVDF materials is used to produce the piezoelectric polymer layer and the coating film, we have provided a nice procedures for manufacturing piezoelectric polymer plates (PVDF). In order to find the proper proportion of the PVDF to achieve the best material properties, the mechanical behavior of displacements and stresses for the electrets is investigated by experimental measurement and finite element analysis (with ANSYS). It is investigated whether the thicknesses of specimens are affected the polarization. The paper is presented modal analysis techniques for piezoelectric thin plates.
Influence of Dispersion Methods on Nano-Al2O3/Ni+Co Composite Coating by Electrodeposition
Authors: Liu Yan , Li Rui Feng , Yu Si Rong , Han Zhi Wu , Ren Lu Quan
Published: June 2012

The metal and nano-ceramic nanocomposite coatings were prepared on gray cast iron surface by electrodepositon. The nickel and cobalt were used as metal matrix of coating, and the nano-Al2O3 was chosen as second-phase particulates, which had good chemical stability, high microhardness and good wear resistance. The morphology of composite coatings was flatter and microstructure was denser than pure nickel and cobalt coatings. The composite coatings were fabricated by different dispersion methods such as high speed mechanical stir, ultrasonic vibration and ultrasonic vibration together with mechanical stir. The result indicated the nano-Al2O3/Ni+Co composite coating with fine and compact microstructure are obtained compared with pure Ni-Co coating. The nanoparticles were dispersion evenly when dispersion style was ultrasonic vibration together with mechanical stir according to composite coatings SEM images of different dispersion style. The concentration of nanoparticulates reached a maximum value when the dispersion style was ultrasonic vibration together with mechanical stir, at the same time the mechanical property such as microhardness reached a maximum value also. The reason was that nano-Al2O3 caused dispersive strengthening and grain refining.
The Friction and Wear Properties of Conventional and Nanostructured ZrO2-7wt.%Y2O3 Thermal Barrier Coatings Deposited on TiAl Intermetallic Alloy by Plasma Spraying
Authors: Wang Dong Sheng , Tian Zong Jun , Wang Song Lin , Shen Li Da
Published: June 2012

It has attracted very strong interests in enhancing the wear resistance of the TiAl intermetallic alloy. In this paper, both plasma-sprayed conventional and nanostructured ZrO2-7wt.%Y2O3 thermal barrier coatings (TBCs) were prepared on TiAl alloy, and microhardness of coating were investigated. Meanwhile, the dry sliding friction tests on the substrate, the traditional coating, and the nanostructured coating were evaluated by ball-on-disk tribometer at room temperature. The results show that the microhardness of nanostructured coating is higher than that of the conventional one. Lower friction coefficient and higher wear resistance than the original TiAl alloy is achieved in the coatings under wear test conditions. Due to the existence of nanostructured microstructures, the nanostructured coating exhibits the lowest friction coefficient, and the best wear resistance. The wear mechanism of the original TiAl substrate is severe adhesive wear. However, the wear mechanisms of the TBCs are mild ploughing and severe adhesion.
Corrosion Resistance of Copper Infiltrated on 0Cr18Ni9 Austenitic Stainless Steel by Plasma Surface Technology
Authors: Tang Yan , Zhang Jing Chun , Xu Jin Yong , Wang Gui , Gao Cheng , Mo Wei Heng
Published: June 2012

Copper is infiltrated on 0Cr18Ni9 austenitic stainless steel surface by Double Glow Plasma technology, the surface copper content is about 3.5%, content of Cr in metal infiltration layer reaches up to 29.2%. Under the conditions of normal pressure and temperature, corrosion resistance of stainless steel samples which copper infiltrated on surface was researched in 1 mol/L NaOH solution by measurement method of electrochemical. The result shows that, corrosion resistance of copper-infiltrated stainless steel is about 1.67 times higher than untreated sample in 1 mol/L NaOH solution.
The Study of Pyrite Surface Properties and Effect Mechanism with Xanthate Caused by the Microscopic Crystal Structure and Defects
Authors: Yu Jin Xi , Liu Wen Li
Published: June 2012

The pyrite in the nature, due to the differences of the semiconductor properties caused by crystal structure and the presence of defects, will be bound to seriously affect the surface state and surface-activity of the mineral, eventually make the process of electrochemical reaction and flotation behavior change in the solution. Starting from the microscopic point of view, this article would study the affect mechanism of crystal structure and defects on the pyrite surface properties and the electrochemical reaction process. Studies have shown, because of the existence of the strong Fe-S covalent bond and determinate equilibrium defects, make the Fermi level and valence state of partial surface element change, accordingly lead to special semiconductor and surface properties of pyrite, ultimately affect the process of pyrite electrochemical flotation.
Fabrication and Characterization of Ga and N Co-Doped SnO2 Films by MOCVD
Authors: Huang Jie , Pei Xuan , Ji Feng
Published: June 2012

The gallium and nitrogen co-doped tin oxide (SnO2 :Ga-N) films have been prepared on α-Al2O3 (0001) substrates at 500°C by metalorganic chemical vapor deposition (MOCVD) method. The relative amount of Ga (Ga/(Ga+Sn) atomic ratio) was 8%. The flow rate of gaseous NH3 injected into the reactor chamber varied from 25sccm to 55sccm. According to the XRD patterns, the film grown at the flow rate of 25sccm has the best crystalline structure. Subsequently, a series of co-doped SnO2 films with the Ga concentration varying from 1% to 12% and the flux of 25sccm for NH3 were fabricated. Post-deposition annealing of the films was carried out at different temperatures for 2 h in nitrogen atmosphere. The structural, electrical and optical transmittance properties of the films have been investigated. For the as-deposited films, except that the film with 12% Ga doping has the amorphous structure, other films have the rutile structures of pure SnO2 with a strong (2 0 0) preferred orientation. After annealing, the structures of all films have changed obviously. Especially, the 12% Ga doping film has the polycrystalline structure also with the (200) preferred orientation. The average transmittances for all the films in the visible range were over 85%. The values of the band gaps varied from 3.3eV to 3.5eV for the as-deposited films and 3.7-3.9eV for the annealed ones. The electrical properties of the as-deposited films varied with the Ga content and were being discussed in detail.
Microstructure and Thermal Shock Resistance of Laser Remelting ZrO2-8wt%Y2O3 Thermal Barrier Coating Fabricated by Plasma Spraying
Authors: Wang Chao , Song Ren Guo , Pan Tai Jun
Published: June 2012

The yttrium stabilized zirconia (YSZ) thermal barrier coatings (TBCs) were fabricated by plasma spraying on the surface of H13 hot work die steel and then were remelted by a transverse flow CO2 laser. The phase compositions, microstructure and thermal shock resistance of the as-sprayed and laser remelted coatings were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal shock tests. The results showed that the quality of laser remelted coating was improved obviously. Also, the thermal shock resistance of the TBCs was improved dramatically by laser surface remelting.
The Mechanism of Surface Low Defect in Sheet Metal Stamping
Authors: Shen Hong Qing , Li Shu Hui , Chen Guan Long
Published: June 2012

In this paper, the mechanism of surface low defect in sheet metal stamping is studied. Firstly, we simulate the forming procedure of a stamping component by Finite Element Method (FEM) to observe the growth of surface low defect. And then, we establish an analytical model and deduce the critical stress for local buckling. Finally, we take advantage of the critical stress to detect local buckling areas in the component. The FE simulation result shows that during springback the non-uniform displacement in the thickness direction forms surface low. Moreover, the detected local buckling area agrees with the experimental surface low area. This indicates that the essence of surface low phenomenon is panel’s local buckling under the residual compressive stress during springback.
Dielectric Properties of Plasma Sprayed Al2O3 and Al2O3- 3wt% TiO2 Coatings
Authors: Deng Chun Ming , Liu Min , Deng Chang Guang , Zhou Ke Song
Published: June 2012

In this paper the dielectric properties including volume resistivity, relative permittivity and break down voltage for plasma sprayed Al2O3 coating with and without sealing treatment and as sprayed Al2O3-3wt%TiO2 coating with sealing treatment were evaluated. The effect of silicon resin sealing reagent on dielectric properties of plasma sprayed Al2O3 coating was explored. The results indicated that volume resistivity, relative permittivity and break down voltage for Al2O3 and Al2O3-3wt%TiO2 coating with silicon resin sealing treatment was 6.33±2.25×109Ω.m, 8.11±2.99, 16.42±1.68 kV/mm and 1.06±0.5×1010Ω.m, 7.40±0.15, 14.27±1.20 kV/mm respectively. Sealing treatment was helpful for the dielectric properties of Al2O3 coating owing to the decreased residual water in the coating.
Study of YSZ/Al2O3 Composite Coatings Produced by Electrophoretic Deposition
Authors: Lu Xiao Juan
Published: June 2012

YSZ/Al2O3 composite coatings have been fabricated by using EPD. The microstructures, mechanical properties and micro-stresses of the coatings produced from different sized powders and sintered at different temperatures have been studied. Different attrition milling time leads to different particle distribution modes, thereby different microstructures. Due to the deposition process and the constraint effect from the substrate, a gradient structure has been formed across the coating thickness.
Alumina and Zirconia Laminar Coating Prepared by Complex Electrolytic Deposition Method
Authors: Wang De Ren
Published: June 2012

The deposition of alumina (nano-powder, <80nm) and zirconia doped with yttria laminar composite coatings on Ni3Al coatings were investigated via a complex method of Sol-Gel, electrolytic deposition (ELD) and electrophoretic deposition (EPD). The average particle sizes of alumina and zirconia are 80nm and 20nm respectively. The relation of deposition parameters (deposition voltage, dwell time) and deposition rate was discussed based on the experiment results of alumina, zirconia single and laminated coatings deposition. The post thermal treatments were performed in attempt to acquire a dense multilayer composite ceramic coating. The uniform duplex or laminar coatings could be achieved via this complex method. The surface and cross-sectional morphologies of two layers and ten layers alumina/ zirconia composite ceramic coating after sintering showed that the laminar structure thickness could be tailored by controlling the deposition voltage and dwell time. The sintering mechanism of nano-sized alumina and zirconia was also discussed.
Study on the Durability Comparsion of STS316 Non-Coated and CrN Coated for Metallic Bipolar Plate
Authors: Moon M.S. , Woo Kee Do , Oh J.H. , Song J.H. , Kang S.J. , Yang S.M.
Published: June 2012

Nowadays, many economists and scientist worry about sharply increased to fuel consumption. New energy sources have to be investigation now. This was a base on the low-emission gas, high-energy efficiency, permanence and possible with co-generation. Especially, transportation system has been restricted to system’s total weight. Light weight of a transportation system offers to increase performance. By using light weight in a transportation system, it gives another benefit that reduced oil consumption, improved fuel efficiency and increased Market-value. Fuel cell is one of the new energy systems for next generation. Normally, fuel cell consists of bipolar plate, MEA (Membrane Electrode Assembly) and GDL (Gas Diffusion Layer). Conventional bipolar plate material was used to graphite. Graphite has been very weak at external shock. Machining process is not easy, and the main problem is that the graphite material supplied by oxidizing and reducing agent composition of the gas leak comes. Thus, the manufacturing cost is increased by this reason. This study will be tried to bipolar plate material replacement from graphite materials to metallic material. In this experiment, STS316 base on austenite stainless steel was used. This experiment was observing an effect of surface conditions with corrosion behavior with Non-coated and CrN coated STS316 on a similar PEMFC operating condition. By the results of experimental, CrN coated condition has better corrosion resistance than that of Non-coated condition due to passivation layer on CrN coated surface.
Investigation on Microstructure of CrN-Based Solid Self-Lubricant Composite Coating
Authors: Yang Zhen , Zhang Ping , Di Yue Lan , Cai Zhi Hai , Li Qi
Published: June 2012

The CrN-based solid self-lubricant composite coating was obtained by magnetron sputtering and low-temperature ion sulfuring. The XPS, AES and SEM equipped with EDS were utilized to observe and analyze the microstructure of the composite coating. The results show that there are Cr, Mo, N, S in the composite coating, and the phase structure is CrN, MoS2 and a few oxide. The element S was implanted 500nm in depth. For the sulfurized layer is extremely apt to be oxidized, in this paper, the source of element O is analyzed in detail through comparative studies on different methods for preservation of specimens, and the film-forming mechanism of CrN-based solid self-lubricant composite coating is discussed.
Effects of RE on the Friction and Abrasion Character of Porcelain Enamel Coating
Authors: Zhang Song , Ren Yu Hang , Sun Mo Ran , Hu Fang , Zhang Chun Hua
Published: June 2012

The enamel powder was preseted on the Ti alloy by electrophoresis, and the enamel coatings were obtained through sintering. Friction and abrasion performance of the enamel coatings and RE enamel coatings were compared. The results show that the RE element improved the inner organizational structure of the enamel coating, decreased the friction coefficient of the coating and consequently improved the friction-resistant character of the enamel coatings. By adding RE, the viscidity, suspension and fluidity of the enamel coatings are improved, and that the microstructure of the enamel coating are more dense and the horniness grain phase was more small in uniform during sintering.
Low Cost Anti-Reflection Coating for Photovoltaic Application
Authors: Wu Jing Jin , Wu Hong Cai , Zhao Ce Zhou
Published: June 2012

Optical losses or the effect of reflection from surface of light-matter devices have a significantly influence on their accuracy, reliability and efficiency. Solar cells, including silicon substrate solar cells or dye sensitized solar cells, are one of them. The simplest way to improve the efficiency of solar cells is introducing an anti-reflection coating. This paper investigates the performance of anti-reflection coating by introducing a composite material, using different deposition methods. It is found that the annealing temperature of single anti-reflection layer can reduce to 600 °C by using our recipe. Moreover, the efficiency of three layer anti-reflection coating is modeled by MATLAB to demonstrate the gradient refractive index theory.
Thermal and Flow Modeling of Alkali-Metal Thermoelectric Power Generation (AMTEC)
Authors: Lee Kye Bock , Rhi Seok Ho , Lee Ki Woo , Lee Wook Hyun , Jang Chan Chul , Lee Won Gook , Kim Nak Keun , Shin Dong Ryun
Published: June 2012

The present study shows the thermal modeling on AMTEC (Alkali-metal thermoelectric power generation) system by analytical 1-D simulation method. In the present study, the unique AMTEC design model which consists of an evaporator, single BASE (Beta-Alumina Solid Electrolyte) tube, condenser and artery cable wick were presented. The operating design target of the present AMTEC system were 700°C in the evaporator section, and 400°C in the condenser section for solar energy conversion. The present AMTEC system operates near 10-15 % efficiency and this can be improved with the optimum design of the system. In case of improved BASE design, the system can reach over 30% efficiency.
Recognition and Classification of Hot Strip Surface Defect Based on Binary Tree SVM
Authors: Wang An Na , Hu Chao , Xue Chang Liang , Zhang Hong Rui
Published: June 2012

The paper presents a new method which uses Binary Tree SVM in the automatic classification of surface defects for hot strip. Two types of Binary Tree SVMs are applied in defect classification. Compared with BP neural network and one-against-one SVM, the algorithm adopted in the paper greatly improved the accuracy of classification and decreased the classification time.
Failure Analysis of Valve Seat Corrosion in a Triplex Plunger Pump
Authors: Cai Li An , Xu Ying , Ye Chun Jie , Pan Hong Liang
Published: June 2012

A triplex plunger pump used for activating the journal bearing in cold rolling machine, could work only for one week comparing with the design life for two years in normal condition. The valve seat of the pump, which is made from 42CrMo4, was corroded on its exterior surface and plowed on its seal face. Since this failure, the pump could not work in its operating pressure. By evaluation and numerical simulation of the pump, results indicate that the failure occurred because of crevice corrosion and cavitation corrosion on seat surface and seal face, respectively. The reason to cause the corrosion was clarified and corresponding measures were put forward. Hence, the pump works in a normal condition.
An Intelligent Decision Model for Spinning Process Optimization
Authors: Lv Zhi Jun , Xiang Qian , Yang Jian Guo
Published: June 2012

The yarn production is a complex industrial process, and the relation between the spinning variables and the yarn properties has not been established conclusively so far. In fact, the existing process cases which were recorded to ensure the ability to trace production steps can also be used to optimize the process itself. This paper presents a novel process decision model based on CBR and SVM hybird intelligence for optimization of large numbers of spnning parameters. The applied cases are demonstrated that the intelligent model to optimizing the spinning process is promising.
Development High Stiffness Ratio of Stiffened Membranes for Small Flat Speakers
Authors: Lai Feng Min , Wu Meng Yu , Yang Cheng Mao , Shih Wei Sheng
Published: June 2012

This research for the membrane stiffening manufacture, thickness, weight, manufacturing parameters, stiffness and surface uniformity was discussed. The used of hand rough paper as membrane substrate, and used of roller coating, spray coating of coating methods, and it carried on membrane stiffening process of carbon nanotubes. On the increase smallest weight, it had been a large increase in stiffness, and the flat speakers sound pressure curve smoother. Used different proportion of carbon nanotubes mixture of different resin to membrane stiffening, used SEM to detect the carbon nanotubes stiffening of the membrane surface coating uniformity, even different coating of compare thickness with weight of increase percentage. It used tensile test to explore different coating methods of Young's modulus of the difference. Then, we was manufactured the small plane speaker (L33mm×W21mm×H12mm) according to the various membrane stiffening and measure the sound pressure curve, and it contrasted with computer-aided analysis software obtained the theory of sound pressure curves.
Numerical Simulation of the 3D Turbulent Flow Field in a Cross-Flow Fan Used in the Air Conditioner
Authors: Zhang Yong Chao , Chen Qing Guang , Wang Wei Bin , Xie Bin
Published: June 2012

Aiming at a cross-flow fan used in some kind of air conditioner, the full field 3D model was built, and the numerical simulation of the inner turbulent flow under design condition is resented. The results display the characteristics of flow field in the cross-flow fan, especially the velocity field, pressure field and the velocity distributing before the evaporator. The results can provide basis for optimizing the fan design and the internal flow, and have important value of engineering applications in the increase of the overall performance in operation.
Design and FEA of 125T Face Shovel Excavator’s Arm
Authors: Farooq Zaman Muhammed , Chen Jin , Habtay Gebremicheal Gedion , Pang Xiao Ping
Published: June 2012

In manufacturing industry investors are always looking for economical and safe designs to cope up with the increasing demands of competitive markets. Keeping this objective in mind, arm of CE125 face shovel hydraulic excavator was re-designed to decrease manufacturing cost by reducing weight while keeping the stress approximately same as was used in the conventional design. For this purpose Pro/EngineerTM was used to generate Computer Aided Drawing (CAD) where cross section and inner structure of the design were kept to be semi-elliptical which helped to decrease the weight of the arm significantly. Initial stress analysis was also done in the same CAD software as it is quick and optimization can be done quickly. However sometimes it does not give accurate results because of poor meshing, so final analysis was done in AnsysTM. Analysis in AnsysTM calculated the stress to be 114 MPa while displacement came out to be 3.8 mm. Comparison of two models showed that the weight of new design is 5.1% less than the conventional one.
Modeling and Simulation for Nutation Drive with Rolling Teeth
Authors: Wang Guang Xin , Li Lin Jie , Guan Hong , Guan Tian Min
Published: June 2012

According to the nutation movement of a rotating coin on a table, a novel nutation drive with rolling teeth is presented on the basis of oscillating teeth gear transmission. Firstly, the structure of mechanism is provided and transmission theory is declared. The formulae for calculating the transmission ratio of the mechanism is developed. Secondly, the modeling of this nutation drive is built. Finally, the results of theoretical calculations are verified by dynamic motion simulation of the prototype mechanism. In addition, Numerical control(NC) simulation of machining the stator and the rotor gears is developed.
Slow-Release Antibacterial and Physical Properties of PVA Antibacterial Film
Authors: Jiang Ping , Hao Xi Hai , Sun Miao
Published: June 2012

The antifungal PVA film was fabricated by addition of the clove oil/β-cyclodextrin inclusion complex into PVA, which is acted as the basic packaging material. The mechanical properties, oxygen permeability and the bacteriostatic action of the film varied with the additional amount of inclusion complex. The tensile strength of PVA film decreased with the addition of inclusion complex and the effect is little when the amount was less than 25%. Adding less than 25% had no obviously effect on oxygen permeability of the film. It proved that pure PVA films have no antibacterial property and the growth of aspergillus was inhibited in different degrees when the content was different. The growth range of aspergillus is smaller and the bacteriostatic action to aspergillus is increased with the increase of inclusion complex amount of agent. The inhibitory zone appeared when the inclusion complex amount was more than 20%.
Application Research of Damping Board in Ball Grinding Processing
Authors: Fu Cai An , Liang Xue Jun
Published: June 2012

In order to improve the efficiency and precision of steel ball grinding, analysis the main factors which influence them, and then introduce the method of improvement, bring in the conception of damping board system, thus obtain the new craft plan of ball grinding. At last, obtain the corresponding technological requirement and design mentality by modeling analysis, to provide basis for the further research later.
Study on Blade Bend Optimization of Aircraft Engine
Authors: Liu Wang Sheng , Hu Chun Lai , Sun Yan , Shi Guo Dong , Liu Xing Long
Published: June 2012

Whether blade profile of aircraft engine is reasonable depends on whether the surface pneumatic distribution given is satisfactory[1,2].In the experiments of optimization design,we discover that the design results are too dependent on surface velocity distribution with the following problems:The first is that the blade bend does not meet the requirements;The second is that blade thickness does not meet the requirements;The third is that the profiles of suction and pressure surfaces are not superposed very well at the leading and following edges with mouth open or cross;The fourth is that some situations of non-design behaviour are not taken into account. In this paper,these issues of blade bend optimization are discussed.
Simulation on Agglomeration of Liquid Inclusion Particles in Steel Based on VOF Model
Authors: Guo Luo Fang , Li Hong , Wang Yao , Ling Hai Tao , Song Wen Chen , Feng Jia
Published: June 2012

The Micro agglomeration process of liquid inclusion particles in static steel was simulated based on VOF model of fluent software. The results were indicated that: two liquid inclusion particles, which are apart from a certain surface distance, can aggregate into a larger new inclusion particle; in order to promote liquid inclusion particles aggregate and accelerate inclusions flotation to be removed, the following measures can be taken: shortening the inclusion particle surface spacing, reducing the steel viscosity and controlling the composition of liquid inclusion in high interfacial tension area.
Numerical Analysis of the Influence of Shield Tunneling to Adjacent Loaded Piles
Authors: Zhu Feng Bin
Published: June 2012

Suzhou Light Railway Line 1 is used as a case history to investigate the effects of the non-homogeneity of soil, distance to the tunnel and cushion cap on the pile foundation performance including horizontal displacements, settlements, axial forces and bending moments. According to behaviors of the single pile and pile group under different concentrated loads, it is concluded that with tunneling, the loaded pile foundation will rotate toward to the tunnel and their bearing capacity is influenced significantly.