bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of CAD/CAM Technology in the Development and Lofting of Complex Sheet Metal Parts
Authors: Li Fu Sheng , Han Zeng Sheng
Published: September 2011

For a development and lofting of complex sheet metal parts, the traditional work is hard and lack of accuracy. Using CAD/CAM to aid development and lofting needs neither lofting site nor mathematic models, but can achieve high quality and efficiency. The development and lofting of multi-tapered conical tube with 90º elbows as an example, the paper describes the methods of development and lofting of complex sheet metal parts based on CAD​/CAM technology, such as drawing view of four sections of tapered conical tube with 90º elbow, drawing graphic model and developed view of frustum conical tube, checking the coordination situation of each section oblique cone tube model, and blanking programming using CAXA wire EDM V2 software.
A Note on Two Cooling Methods in Surface Grinding
Authors: Nguyen Thai , Zhang Liang Chi
Published: September 2011

This paper reviews two cooling methods for surface grinding. These include i) replacing the toxic coolant by a mixture of cold air and vegetable oil mist, and ii) minimising the use of coolant using a segmented grinding wheel system. The discussion concludes that the cold air-oil mist provides an environmentally conscious mean for surface grinding. However, due to the limit of its cooling capacity, it is more applicable for fine grinding. Using the segmented wheel system can minimise coolant consumption and can improve grindability.
Modeling and Experiment of Pulse Electrochemical Deburring on Inclined Exit Surface of Drilling Hole
Authors: Ma Ning , Xu Wen Ji , Wei Ze Fei , Pang Gui Bing
Published: September 2011

In this paper the characteristics of pulse electrochemical deburring (PECD) is analyzed through a developed mathematical model and main influencing factors such as applied voltage, pulse duty factor, deburring time, initial burr height and initial interelectrode gap on burr height have been analyzed. The paper also highlights the scheme of the developed PECD system designed to operate within the parametric limits. The calculated results obtained from the mathematical model are found to be approximately consistent with the experimental results. The results show that initial burr height h0=0.057mm is removed, and the fillet radius R=0.248mm is obtained. The present paper through various parametric studies will act as a guideline for the operation of a PECD system.
Direct Rapid Manufacturing Technology with Laser for Metal Parts
Authors: Jin Yong Ping , Hu Ming
Published: September 2011

Directly driven by CAD model, based on principle of discrete-superposition, rapid prototyping technology is the generic terms of rapid manufacturing 3-dimensional physical entities with any complex shape. One of its main development trends is direct rapid manufacturing for metal parts. Up to now, there are many methods utilizing laser beam containing selective laser melting, selective laser sintering and laser engineered net shaping. Research and development of these means for direct rapid metal manufacturing are presented in this paper. Digital direct rapid manufacturing for metal parts represents development direction of advanced manufacturing technology.
One Optimizing Method for Moments of Inertia Applied with Improved Adaptive Genetic Algorithm
Authors: Sun Heng Hui , Luo Min Zhou , Dong Xiang , Zha Shi Hong
Published: September 2011

In this paper, a new optimizing method for the moments of inertia of a mechanical structure was advanced. First, a new optimal model for the moments of inertia was advanced, which only involved with single objective and single variable, in order to reduce the calculating complexity of traditional multi-objective and multi-constrained optimizing model for the moments of inertia; Then, a new strategy for the probability selection of the crossover and mutation operation was improved to form the IAGA. The calculating results proved that, comparing to the Standard Genetic Algorithm (SGA), the IAGA improved in this paper had the advantage of converging faster, more powerfully searching, and less possible of falling into the local optimum. By that, the feasibility of the method advanced in this paper was demonstrated.
A Computer Aided Testing System for an Aero Turbo-Shaft Engine
Authors: Li Chang Zheng , Lei Yong
Published: September 2011

Engine running plays very important roles in a turbo-shaft engine production and maintenance. Traditional computer aided testing is just work as a data acquisition system to measure parameters and control some devices. In this paper, a CAT system is realized based on VXI and virtual instrument technology, which also communicate with the PLC, the ECU and the dynamometer, to provide a centralized information system for a turbo-shaft engine running. Multi-functions are realized to assistant users before, during and after experiments.
The External Circular Precision Detection of Precision Machining Zirconia Ceramics Spindle
Authors: Lu Feng , Chen Shi Chao , Bao Yuan , Zhang Ke , Wu Yu Hou
Published: September 2011

The electric spindle is the main form of high-speed NC machine spindle. Now the technology of ceramic spindle with its excellent performance applied to electric spindle is becoming a kind of important development trend. The performance of the electric spindle in largely determines machining precision and production efficiency of the high-speed machine tool. In order to meet the requirements of high speed, high accuracy, high reliability and small vibration in the rapid processing of machine tool, it is necessary to make a rigorous precision testing for the precision-processed spindle and obtain reliable data to meet the design standards and performance requirements of all ceramic high-speed spindle. In this paper, contact Surtronic25 type roughness measuring instrument is used for surface roughness analysis, and Leitz ultra PMM-C12.10.7 type tri-ordinate measuring machine is used for the roundness and cylindricity testing analysis of spindle external circular, which can make the surface roughness, roundness and cylindricity of the precision-processed zirconia ceramic spindle pore ​​to meet the design requirements and provide reliability safeguard to promote the using life and high-speed dynamic balance stability of the whole electric spindle.
Numerical Simulation of Temperature Field during the Growth of Nd:GGG Laser Crystal
Authors: Zhang Cai Hong , Bi Lin , Gong Zi Zhou
Published: September 2011

The numerical simulation research on temperature field of crystal and melt by using finite differential method during the growth of Nd:GGG crystal by Cz (Czochralski) method was reported. At first, the mathematical model of the growth of Nd:GGG crystal was given, then the equations without dimensions were given. Finally, the boundary condition was given and the equations were solved by finite differential method. The simulation program was given by above method.Then the change of temperature field of crystal and melt was described by simulation program. The influence of technical conditions of temperature field in the crystal and melt was analyzed.
Study on Small-Diameter Deep–Hole Vibratory Drilling of Difficult-to-Cut Materials
Authors: Xu Xu Song , Sun Zhi Ying
Published: September 2011

To solve the problem of drilling small-diameter deep-hole on difficult-to-cut materials, a kind of DF system combined with low frequency axial vibratory drilling was used. Its vibratory frequency was controlled by a frequency converter and could be adjusted continuously on-line. An inner chip removal deep-hole bit with dimension Φ8.95×500mm was developed and the material of the cutting tip was carbide alloy. Then, the drilling experiment of small-diameter deep-hole on the difficult-to-cut materials 1Cr11Ni4NMo was done. It can be found in the experiment that the chip remove was smooth, the cutting force was little, the cutting tool wear was light, the process of drilling was stable, and many factors of interfering roughness could be canceled or lightened effectively. The results show that DF vibratory drilling system can improve the machining precision and increase efficiency.
The Development of Graphic Design Method Based on Pro/Toolkit Spur Gears
Authors: Shen Zhao Kui , Pan Xiao Lin
Published: September 2011

Pro/Toolkit is the powerful secondary development provide of Pro/E ,It encapsulates many aimed at Pro/E bottom resources library function and call header files.Using VC++6.0 for integrated development environment and under Windows for development.This paper mainly introduces a graphic design method based on Pro/Toolkit spur gears.Firstly by using Pro/E to establish the spur gears 3d model and realize the 3d model parametric design. Then using VC++6.0 to type VC DLL program, design MFC dialog and for source program's compiles and links, to create dynamic link files(DLL or EXE files), through the registration documents and running applications.Finally realizes input gear parameters to get the corresponding gear effect in the dialog.Completed in VC++6.0 integrated development environment using Pro/Toolkit for forging spur gears graphic design. Got use Pro/Toolkit for straight tooth cylindrical gear and internal gear's secondary development interface.To avoid a lot of labor, meet different repeat and improv product design efficiency.
Design and Manufacturing of Complex Surface Impeller Based on RE
Authors: Li Zhi Yang , Huang Ming Yu , Hu Hong Ju , Ni Hong Jun , Zhu Yu , Jia Zhong Shi , Wen Peng Peng
Published: September 2011

Based on the instance of collection the data of complex surface impeller and reconstruction the three-dimensional model, it describes the concepts and basic principles of Reverse Engineering, and discusses the entire process in detail, which are from the data of impeller collected, the impeller three-dimensional model re-Construction, fixture design to NC simulation machining. Solved the design and manufacturing problems of complex surface parts, which can not be solved by the conventional methods.
Design for Deep Groove Ball Bearing Assembly Machine’s Cam Drive System Based on Parametric Modeling
Authors: Liu Yong Xia , Peng Ru Shu
Published: September 2011

Cam mechanism has advantages of compact structure, high driving accuracy, good dynamic characteristics, smooth motion, etc. It is implemented that components transmission among the multiple-station of deep groove ball bearing assembly machine by use of cam drive system. Cam followers depending on cam profile achieve the desired law of motion. The core of cam design is the exact cam profile’s design. The quick and easy method of cam profile design through Pro/E software is introduced in follow. Components’ transmission requirements can be met by cam drive system, which is proved through the analysis of motion simulation.
Research on the Modeling and Simulation of Vehicle R&D Process Based on Petri Net
Authors: Wang Hu , Lv Shu Yu
Published: September 2011

To quantitatively analyze the design process of vehicle R&D, and provide the basis for process optimization of research and development design, thus shortening the development cycle of new cars and enhancing the competitiveness of car business. Firstly this paper analyzes the core business of vehicle R&D design, and then apply the theory of Petri nets to build Petri model of vehicle R&D design process, finally apply simulation software to simulate the Petri model, and analyze the key constraints point of the R&D design process, point out the improvement direction of vehicle R&D process.
W722 Lathe of Fault Detection and Diagnosis
Authors: Lou Bin Chao
Published: September 2011

Shanghai YinChaoChang a W722 lathe processing of metal parts, workpiece surface machining quality external circular no obvious problem, and the machine's vibration is small. But in the processing of main parts - rubber managers stamped drum, workpiece surface appear periodically outside round the chatter marks, general examination of hard to find the failure causes of machine tools. We adopt mechanical fault diagnosis technology to find fault location and fault machine of the machine, first nature of transmission chain of analysis and calculation, obtains each train parts, use characteristic frequency JGZY - 1C type mechanical failure diagnosis in the daily use of the lathe spindle 560 turn/points and 735 turn/cent two kinds of rotating speed sensor separately carried on the test, pick up the spindle box, respectively go knife box and slip board box to collect the vibration signal of signal filtered (stationary fault) and demodulation spectral analysis, got a lot of lathe vibration signal spectrum diagram. And the calculated value and vibration signal spectrum diagram compares analysis, find out the fault location and machine determine the fault properties. Replace the corresponding gear and bearing, fault phenomena disappear.
A Fast Scanning Algorithm for Extension Velocities in Level Set Methods
Authors: Ouyang Gao Fei , Kuang Yong Cong , Zhang Xian Min
Published: September 2011

A novel fast scanning method is proposed to further stabilize and fasten the construction of extension velocities in level set method. Based on the partial differential equations and scanning schemes, the proposed algorithm only needs our four times to sweep and simple operations to build an extension velocity in O(N) time, where N is the number of grid points. The extended velocities are continuous and preserve the signed distance function without need for re-initialization. Moreover, the fast scanning algorithm has no dependence on the construction of the signed distance function. At last, the presented classical examples show that the proposed approach is accurate, simple and efficient.
Finite Element Analysis and Structure Design for Chassis of Aircraft Towbarless Tractor
Authors: Xing Zhi Wei , Lv Yong , Li Jun Hui
Published: September 2011

Aircraft tow-tractor is one of the absolutely necessary ground support equipments (GSE) in the airport. The chassis is the framework on which the body and working parts of the tow-tractor, what plays a significant role in a entire vehicle design. The endurance and rigidity of the chassis have a direct influence on the reliability and practicability. In this paper, a simplified model is established for the carriage of aircraft towbarless tractor on the three-dimensional modeling platform--Proe5.0, and then mechanical finite element analysis are proceeding by Ansys12.0. The results show that the chassis model is of a appropriate structure and the design coincides with actual requirements, the Stress Concentration at the joint between carriage and wheel-grip mechanism has been reduced substantially. All trial results have laid a foundation for future design of the entire tractor.
Research on JIT Production Logistics Management System
Authors: Su Wen Gui , Qin Pin Pin , Li Li , Huang Xiong
Published: September 2011

Just in time (JIT) distribution is an necessary activity for the JIT production system ,which delivers the right parts with the right quality and quantities to the right place at the right time. In this paper we analyze and build a logistics distribution mode of a just-in-time based production system and develop a JIT production logistics information system using RFID technology, XML technology and .NET platform. The information system has four function modules: user management, basic data management, distribution management and interface management. The practice of JIT pull production shows that the rate of material distribution is effectively increased and the inventory is effectively decreased . The developed system and ERP system can control production process and material movement well .
Ergonomically Designed Kneeling Chair Influence on Adolescent Idiopathic Scoliosis
Authors: Wang Fang , Feng Xi
Published: September 2011

Ergonomically design is very important for younger body growth healthy. According to the anthropometry which include the differences between adults and teenagers, and the motion of normal behavior and daily domain that influence of sitting situation, which designed for teenagers can get special design that fit for the younger in age stage developmental. Using this virtual simulation technique can detect the design of more product modeling whether accord with human body posture virtual scene lumber curvature, thus obtains the more effectiveness about posture of the human body according to Ergonomically design and back support condition. This method will greatly improve the comfortableness with prolonged sitting, and reduce low-back pain caused by poor chair design. Function of the back support system can affect muscles tension and guard against Adolescent idiopathic scoliosis.
The Analysis and Treatment to Lube Oil Separator’s Leakage
Authors: Sun Shu Ye , Zhang Guo Yong
Published: September 2011

The lube oil separator is widely used in lube oil system of merchant vessel. The lube oil separator functions to purify the lube oil to ensure its good working performance. The working condition of the oil separator will greatly influence the normal running of many plants. The lube oil separator used in our laboratory is Mitsubishi SJ700. In the processing of purifying, oil leakage from the water outlet is found. In order to find failure point, the basic structure and the working principle of the separator is introduced. The separator is dismantled according to the procedure. After cleaning some parts found dirty and replacing some sealing elements, the separator is reassembled. When starting the separating process again, the failure remains. Through further analyzing the structure and working principle of the separator, the trouble spot is found out. After removing the failure, the separator finally is repaired. To prevent similar accident occurring again, some suggestions are presented.
Research and Design of Box-Taking Mechanism in Automatic Cartoner
Authors: Cao Ju Jiang , Li Long , Tian Xiao Hong
Published: September 2011

Box-taking mechanism is an important part of automatic cartoner, it also is a “bottleneck” in automatic cartoner. After analyzing the process of box-taking and the key movements for automatic cartoner, designed a new kind of box-taking mechanism with double cam five-bar combined mechanism. Combining five-bar mechanism and cam advantages, the mechanism can be realized the trajectory with the demand of velocity and gesture. The detailed and interchangeable gas circuit also be designed, which reduced the complexity of replacing the seal rings. Practical result shows that the mechanism could execute the box-taking gesture quickly and smoothly.
Surface Texturing for Crystalline Silicon Solar Cell Using RIE Equipped with Metal-Mesh
Authors: Kong Dae Young , Cho Chan Seob , Jo Jun Hwan , Kim Bong Hwan , Lee Jong Hyun
Published: September 2011

Surface texturing is an important process to enhance light absorption and to improve efficiency of a solar cell. Reactive ion etching (RIE) process is a very effective process and low-cost process, which is applicable during the dry etching processes for thin crystalline silicon solar cells with large areas. In this study, we studied a dry and free mask texturing process on crystalline silicon wafer using SF6/O2 plasmas and metal mesh in a RIE system, with special attention to the effect of the metal mesh and RIE conditions on the texture of the silicon surface. In particular, we have found an optimized RIE conditions by increasing the distance between the metal mesh and silicon wafer. We have also found that by increasing the RIE process time, with an optimized SF6/O2 ratio, pressure and RF power, it is possible to switch from a random texture, to a nm-size pyramid texture and finally to an um-size pyramid texture. This RIE system textured a crystalline wafer surface that formed about 1~2 μm pyramidal black silicon with 7~10% of reflectivity.
A Method about Functional Coupling Based on Trimming
Authors: Wang Wei , Jiang Ping , Wang Jia Qi , Tan Run Hua
Published: September 2011

In the mapping from functional requirements to design parameters in Axiomatic Design, a relation model about design parameters will be discussed. According to this model, use trimming which is redefined with Axiomatic Design and Evolution Mode of TRIZ to reduce coupling. At last, a JYS - Z electric brush type filter is described to prove the process.
Experimental Study on Fretting Wear Behavior of Steel Worm Gear Pair
Authors: Li Zhu Jun , Chen Ze Yu , Chen Xuan Min , Li Ying
Published: September 2011

In order to prolong the life of steel worm pair used in track tension adjuster, a test method was designed to evaluate the effect of hardness on the fretting wear behavior of steel worm gear on a SRVⅣoscillating friction and wear tester. Through this method the fretting wear behavior of 40CrNiMoA steel-18Cr2Ni4WA steel with different hardness matching was studied under dry sliding condition at room temperature. The results show that in the steel worm gear pair composed of 40CrNiMoA steel and 18Cr2Ni4WA steel, the fretting wear volume loss of 40CrNiMoA steel decreased and that of the 18Cr2Ni4WA steel worm material increased with the hardness of 40CrNiMoA steel increasing. When the hardness of 40CrNiMoA steel is about HRC49, fretting wear volumes of the worm specimen was equal to that of the worm wheel specimen. Based on the experimental results, reasonable hardness matching for prolonging the life of steel worm pair used in track tension adjuster was proposed.
Contact Analysis and Optimization of a New Type of Propeller Shaft-Hub Connection Structure
Authors: Li Wen Jing , Sun Hua , Chen Rui Xiang
Published: September 2011

According to the characteristics of aero products, the products must be as simple and light as possible under the premise of ensuring the performance. Using the finite element analysis software ANSYS to establish a nonlinear contact model about a new type of composite shaft-hub connection structure which is used in the propeller. Based on the model to give a optimization about the elastic ring, part of the shaft-hub connection structure, which defines the semi-cone angleαand the width B of the elastic ring as the design variables, the stress of the elastic ring as the state variables. The optimization results lay the theoretical basis of designing a composite shaft-hub connection structure which meets the requirement of aero products.
Research on Structure Analysis of Asphalt Box Based on ANSYS
Authors: Zhang Yan Yan , Zhu Ming Ming
Published: September 2011

Asphalt need asphalt box to preservate heat in the production and use process,if stored appropriate, asphalt can repeated heating namely its performance won't be damaged badly under higer temperature keep a very long time,So, the asphalt box’s performance is very important. in this paper, the mechanical properties of the material was considered, the FEA model of asphalt box was be setted up,the stress and strain of unloading entrance was be analysed when in the 4g longitudinal accelerated speed and a standpoint was be determined that the structure performance of asphalt box is Meets the related standard requirements.
Analysis on Option Value of Supplier Involvement in Collaborative Development
Authors: Zhang Zi Jian , Pan Hua
Published: September 2011

The purpose of this study was to recognize and analysis the option value of supplier’s involvement in the collabotative project. Using real option theory, this paper began by distinguishing two forms of exit mechnisms for a collaborative project between enterprises in supply chain, and then analysised the anticipated project value of every participation by different exit mechanism. Research conclusion shown, the option behaviour of common termination is endogenetic in project, and every participant will get benifit through making the parterners’ agreement consistency, which emphasis the collaboration nature of partnership. Unilateral termination of collaborative project is an non-cooperative behaviour which will incur loss of parterner’s benefit and reduce the project’s overall value.
Topology Structure Design of 12 Flapping-Wing Mechanisms
Authors: Hsu Meng Hui , Chen Hsueh Yu , Weng Ting Sheng , Liu Feng Chi
Published: September 2011

People used the Micro Air Vehicles to patrol the military activity or explore the danger region.The important parts of Micro Air Vehicles are the flapping-wing mechanisms those can simulate the wing-motion of flying being.Hence this work is to present a systematic approach for designing new flapping-wing mechanisms with one degree of freedom that can simulate the wing-motion of long ear bats and insects.First,we analyze the topological structure and motion characteristics of existed flapping mechanisms.Then, the design criteria of the topological structure are described.Based on the design criteria of topology, the methodology of mechanism design is applied to synthesize new flapping-wing mechanisms. Finally, this research of the provide method can obtain 12 new flapping -wing mechanisms and one prototype of a flying insect mechanism.
On the Study of Non-Engineering Students Applied Open Source for Learning Graphic Design Skills of Dynamic 3D Motocross Suspension Mechanism
Authors: Weng Ting Sheng , Hsu Meng Hui
Published: September 2011

The rapid establishment of current technology is dependent on the effective integration of interdisciplinary science. Hence the R & D persons with multiple domain skills are strongly required for most industries. Although, the skills training for students of Vocational-Technical College and general University cannot stratify with the above need for industry. Based on the fact of drawing is the common language of industry, the designer, manufacturer, or quality control and inspection personnel use the language to communicate to each other for solving operational problems. Therefore, the purpose of this work is to train non-engineering students can learn simple mechanical drawing skills and recognize drawings. The training includes using multimedia and 3D graphic technique to write a python (open source language) program for establishing a 3D interactive graphics of a motocross suspension mechanism. As results, the students can transform visual information of the topological structure of a suspension mechanism to the dynamic digital interactive graphic. The results also show this practical technical education and training can improve the ability of non-engineering students to meet the industrial requirements.
Thermodynamic Properties of Water during Phase Transition and Simulation on Freezing Process in Fractured Rock
Authors: Kang Yong Shui , Liu Quan Sheng , Yan Jie
Published: September 2011

Thermodynamic properties of water during phase transition in fractured rock are discussed. Thermodynamic equations of water in fractured rock while freezing were analyzed, and an example was simulated by FLAC3D. The stress field as well as the temperature field is obtained. The results demonstrated mechanical and thermal influences on rock due to phase transition of water in fractures.
Multi-Toothed Milling Force Model and Simulation for Form Milling the Gear of the Hypoid Gears
Authors: Jia Xin Jie , Deng Xiao Zhong , Ren Xiao Zhong
Published: September 2011

Prediction of the forces in milling hypoid gear was often needed in order to establish automation and optimization of the tooth-milling processes. Based on the geometrical theory of the format face-milling, the multi-toothed milling forces theoretical model for form milling the gear of the hypoid gears is presented, the milling force factors were calibrated via single factor experiments and the simulation programs were prepared. Experiments were carried out to verify the availability of the multi-toothed dynamic milling force model, the experimental results is consistent with the simulation results.
Optimal Design of Polishing Trace for Link-Type Optical Fiber Polisher
Authors: Hsieh Long Chang , Chen Tzu Hsia
Published: September 2011

Mike Buzzetti proposes an optical fiber polisher which is a link-type mechanism with double flats in 1999. Buzzetti’s optical fiber polisher produce 8-shaped grinding traces to polish the end face of optical fiber connector. The purpose of this paper is to design the optimal polishing traces of single-plate optical fiber polisher to avoid the patent of Buzzetti’s mechanism. First, a link-type single-plate optical fiber polisher, which is consist 7 links and 8 joints, is proposed. Then, analyze the polishing trace, velocity, and acceleration of Buzzetti’s mechanism and new mechanism. Finally, we take the curvature scope percentage (sp) and the velocity deviation percentage (Vdp) as the objective functions, and use global search to achieve optimized design so that the double- crank single-plate optical fiber polisher will produce the optimum polishing trace which is like the digit “8”. The results of this paper are: (1) The velocity deviation percentage of double-crank single-flat optical fiber polisher (Vdp= 61.8241%) is lower then the original mechanism (Vdp= 76.8652%). And, (2) The maximum acceleration of double-crank single-flat optical fiber polisher (amax = 1231 cm/s2) is lower then the original mechanism (amax= 2323.0 cm/sec2). The result indicates that the polishing effect of the double-crank single-flat optical fiber polisher is better then original mechanism.
Stress-Induced Phase Transformations of Micro-Crystalline Silicon Films Arising at Nanoindentations
Authors: Han Chang Fu , Lin Jen Fin
Published: September 2011

The stresses and strain values at various indentation depths are applied to determine the Gibbs free energy at various phases. The intersections of the Gibbs free energy lines are used to determine the possible paths of phase transitions arising at various indentation depths. All the critical contact stresses corresponding to the various phase transitions predicted by the proposed model for the specimens treated at four annealing temperatures were found to be consistent with the experimental results. The proposed model is thus valid for predicting contact parameters using nanoindentations. The critical contact stresses for the phase transitions increased with increasing specimen annealing temperature.
Fire Safety Assessment Research for High-Tech Plants
Authors: Wang Yaw Long , Chang Yi Ming , You Mei Li , Chen Kun Yue , Lin Chun Ping , Shu Chi Min
Published: September 2011

Most of the buildings for high-tech plants are fireproof and the process equipment in the clean room is in compliance with high-standard fire prevention evaluation regulations such as National Fire Prevention Association (NFPA), Factory Mutual (FM),and Semiconductor Equipment and Materials International (SEMI). However, fire management is usually neglected though fire protection higher than domestic fire control regulations is applied. Fireproof and smoke-proof design of the original buildings can be damaged due to expansion of production facilities, causing a potential danger of a fire. Cases of fires in domestic semiconductor manufacturing factories were explored in this research and claim settlements provided by MSIG Mingtai InsuranceCo.,Ltd., Taiwan to high-tech plants were analyzed for determination of the quantified weights used by the insurance companies when evaluating fire risks of a building. The fire safety badge promoted by Architecture and Building Research Institute, and Ministry of the Interior was also discussed for reference of fire safety assessments of high-tech factory buildings in the future.
The Find-Forming of Transmission Line in ANSYS
Authors: Kong Wei , Zhu Ming Wei , Sheng Zi Lin
Published: September 2011

Transmission line wire is a kind of suspension cable structure, need to determine the initial state of the wires, so can make a accurate analysis for the transmission line system. This paper introduce the form-finding process of wires in ANSYS, get the final sag and stress ,compared with the theoretical value ,proved the accuracy of form-finding in ANSYS.
Based on Entropy Weight and Fuzzy Comprehensive Evaluation Ecological Benefits of the Project—Analysis on Cold-Formed Thin-Walled Steel Residential Structure
Authors: Zhang Qiang , Wang Bo , Liao Fang Wei
Published: September 2011

In this article, the entropy weight and fuzzy comprehensive evaluation methods is applied to Ecological Benefit of cold-formed thin-walled steel residential structure. Designed indicators system of Ecological benefits about cold-formed thin-walled steel residential structure, we divided into nine indicators in the system, then we grant questionnaire through selecting experts of project benefits Evaluation and experts on study about cold-formed thin-walled steel residential structure, Scoring the importance of eco-efficiency indicators, Using the Entropy weight to determine the weights of evaluation indexes, then combining with fuzzy comprehensive evaluation model, comprehensive evaluation on a variety of factors is made, analyzing ecological benefits about cold-formed thin-walled steel residential structure, eventually the result of Comprehensive Evaluation of Ecological benefits about cold-formed thin-walled steel residential structure is obtained.
Analysis on Effects of Fuel Cam on High-Pressure Fuel System
Authors: Li Ming Hai , Liu Biao , Ning You Bo
Published: September 2011

GT-Suite software is used to establish the simulation model of high-pressure fuel injection system for diesel engine. Simulation parameters are modified based on the comparison with given experimental results. In order to improve diesel engine fuel injection performance, the cam profile was improved to ensure a high injection pressure and smooth operating characteristics. A more reasonable fuel cam profile was designed by analyzing the injection characteristics and dynamics. It improves the fuel mixture formation and combustion, so diesel economy and emissions performance are also guaranteed.
Study on Figuring Technique on a Back-Strap Loom of Li Nationality
Authors: Li Qiang , Li Bin , Yang Xiao Ming
Published: September 2011

Figuring technique on a back-strap loom of Li nationality is a key to study on the most primitive form of figuring in ancient China. However, the previous studies on figuring technique on a back-strap loom of Li nationality were not very clear, and led to much misunderstanding. Based on our investigation on the spot of Hainan province, we introduce the arrangement principle of weave structure of brocade of Li nationality and the operation principle of figuring technique on the back-strap loom, at last we explain the operational process of figuring technique on a back-strap loom of Li nationality. It is concluded that figuring technique on a back-strap loom of Li nationality employs the dislocation arrangement of figuring parts.
Studies on Curing Kinetics Parameter of TDI-PPG-MOCA Polyurethane by FTIR
Authors: Wen Qing Zhen , Yu Chao , Zhu Jin Hua , Liu Tian Yu
Published: September 2011

The curing process of polyurethanes was investigated with FTIR method. The curves of conversion (α)VS curing reaction time (t) at different temperatures were obtained .The curing reaction of the system was found to be second order reaction. The reaction rate constants and activation energy had been measured. Effect of the use lever of curing agent and temperatures on curing reaction was discussed. The results showed that when the mole ratio of NCO/OH is smaller than 1, the crosslinking reaction take place at high temperature.
Study on Complex Adaptive Features of Enterprise Network
Authors: Shi Yong Gui , Yan Jian Fen
Published: September 2011

Based on the analysis of complex adaptive systems theory and classification of enterprise network, the article proposes that the enterprise network is a kind of CAS. Although the enterprise network has a variety of forms, they all have the basic characteristics of CAS: Aggregation, Identification, Nonlinear, Stream, Diversity, Internal model and Building blocks. The article discusses the complex adaptive features of the enterprise network which includes has active adaptive, multi-hierarchy nature, open, non-linear (butterfly effect), synergy and learning together and other characteristics, the enterprise network is made of a number of agents who are relatively autonomous and intelligent, each node enterprise in the enterprise network can be regarded as independent intelligent agents, in general the agents operate independently or semi-autonomous based on their own goal and ability of decision-making, as part of the system, these agents and their behavior have a high degree of coupling or dependency, the integrated level of system will depend on the coordination of the dependence. So the article gives the behavior model of enterprise network agents.
Effect of Si Content of Al-Si Matrix on Roll Cast Wire Inserted Strip
Authors: Haga Toshio , Takahashi Kenta , Kumai Shinji , Warari Hisaki
Published: September 2011

Effect of Si content of Al-Si matrix on roll cast wire inserted strip was investigated in this paper. 99.5%Al, Al-4%Si , Al-12%Si and Al-18%Si were used as matrix. Slit depth of the nozzle, superheat of melt, wire-diameter and roll speed was chosen as the casting parameters, too. Addition of the Si was useful to prevent the reaction between the matrix and the wire. A downward melt drag twin roll caster could cast the wire inserted strip of the Al-Si matrix of which Si content was ranging up to18%. Composite strip, which matrix was hyper eutectic Al-18%Si, could be cast at the speeds up to 20m/min. The gap between the wire and matrix became thin when the superheat was high. When the slit depth of the nozzle was too shallow, the wire could not be inserted in the strip. The thickness of the wire inserted strip became thinner as the roll speed became higher.
Research on Technology Introduction and Innovation of Shanghai Modern Silk Reeling Industry
Authors: Xiao Ai Li , Guo Xing Mei
Published: September 2011

This article discussed on the technology introduction and innovation of Shanghai modern silk reeling industry. It took the Jardine Silk Factory as an example at first, introduced the silk reeling process in Shanghai modern silk reeling industry. Then it discussed the introduction and production of silk reel machine, made a specific analysis on the sitting system reeling machine, standing system reeling machine and double cocoon reeling machine.
Microwave Promoted Effect of Starch-g-Butyl Acrylate Sizing Copolymer Grafting
Authors: Wu Hai Liang , Shen Yan Qin
Published: September 2011

Grafted Copolymers of Starch-g-Butyl acrylate were prepared under conditions of micro-wave field and the normal heat resource, the ammonium peroxysulfate (APS) was used as initiator and the reagent was in sub-solid state. The structures of the grafted copolymers were characterized by FT-IR, and the copolymer graft ratio, molecular weight of grafted chain and grafting frequency were tested. The results showed that the micro-wave not only had heat effect but also had non-heat effect during Starch-g-Butyl acrylate copolymerization.
Exploration on the Production of Natural Green Anti-Bacterial Health-Care Textiles
Authors: Weng Yi
Published: September 2011

Chitosan has the function of anti-bacterial, and it can produce natural green anti-bacterial health-care textiles. However, after the finishing process, the fabrics properties are influenced as well. With the experiments, we study the impaction of chitosan on the fabrics properties. The results indicate: the anti-bacterial performance is good after the finishing process, and the shrinkage has been greatly improved.
Influence of Mechanical Properties of Lightweight Silk Fabrics on Seam Shrinkage
Authors: Wu Qiao Ying , Zhang Wen Bin
Published: September 2011

The purpose of this article is to study the effects of mechanical properties on seam shrinkage of lightweight silk fabrics. Thirty five silk fabrics are used for experiment. Mechanical properties of the fabrics on warp and weft directions were tested by FAST instrument. Seam shrinkage rate were tested. Curve regressions were used to analyze the influence of mechanical properties on seam shrinkage. The results showed that the bending rigidity and extensibility were closely correlated with the seam shrinkage rate, while the formability and rigidity were not the main factor of affecting the seam shrinkage of the light-weight silk fabric. The regression equations of bending rigidity and seam shrinkage rate, extensibility and seam shrinkage rate were obtained.
Surface Modification of Polyester Fibers by Encasing Sucrose Ester and Grafting Soybean Protein
Authors: Gao Su Hua , Zhang Gang Xian , Zhang Feng Xiu
Published: September 2011

Polyester has many superior characteristics such as high strength, durability, and good wash-and-wear properties. But it is not comfortable to wear. Modifying polyester fiber with animal and plant protein was seldom reported, and the fastness of protein was not good enough because there are only few hydroxyl groups on the surface of polyester fibers. In this study, sugar ester(SE) which had both hydrophobic aliphatic chain and hydrophilic hydroxyl groups were encased into surface layer of polyester fiber at high temperature and pressure. The hydrophobic part of sugar ester could be inserted into the polyester fiber, and the reactive hydroxyl groups would stay on the surface of polyester fiber. Then soybean proteins could be grafted on the surface of polyester fiber with sugar ester glycidyl ether (SEGE) as crosslinking compound. Surface morphology and structure of the fabric were studied by SEM、FT-IR、XRD、DSC. The results showed that the surface of polyester fiber was covered by SE and soybean protein overlay film, the encased sugar ester and grafted soybean protein fiber had little change on structure, and the proper grafting temperature was 100°C, time 30min. Encasing and grafting technology is a promising method for modification of polyester fiber.
Influences of Soft Monomers on the Application Properties of Hydrophilic Polyurethane with Mixed Polyether Segment
Authors: Quan Heng , Gu Zhen Ya
Published: September 2011

A series of hydrophilic polyether polyurethanes were prepared with two-steps technique from 4,4’- diphenylmethane diisocyanate (MDI), polytetramethylene glycol 1000 (PTMG1000) and polyethylene glycol 1000 (PEG1000) with 1,4-butanediol (BDO) as the chain extender. Further more, the relationships between structure and moisture permeability, water resistance, hydrophility and phase inversion temperature (PIT) of the polyurethanes was investigated. For polyether polyurethanes with nicer micro phase separation structure, the studies show that the hydrophilic ether bond content and mobility of soft segment chains have decisive effect on their water resistance, moisture permeability and hydrophility without reference to the soft segment content on the whole.
Preparation and Properties of Cationic Graft Starch Sizing Agent
Authors: Zhang Hao , Wang Jian Kun , Wang Rui , Fan Xiao Ping
Published: September 2011

In this article, a new kind of starch sizing agent, cationic graft starch [CS-g-P(AM-co-HEMA-co-BA)] was synthesized. Its structure was identified by Fourier transform infrared spectroscopy (FTIR). The results of sizing experiment show that polyester/cotton blended yarn (T/C 55/45) sized with cationic graft starch exhibits better tensile strength, abrasion resistance and lower hairiness counts than cationic starch and PVA. This new starch sizing agent can be an ideal substitute for PVA.
The Effects of Fiber Volume Fraction on the Experiment Modal Behavior of 30°/-60° Carbon Fiber Plain Woven Fabric / Epoxy Resin Composites
Authors: Pei Xiao Yuan , Li Jia Lu
Published: September 2011

A study on dynamic mechanical properties of carbon fiber plain woven fabric (with fiber orientation of 30°/-60°) / epoxy resin laminated composites with different fiber volume fraction was carried out. The test method is single input single output free vibration of cantilever beam hammering modal analysis method. The effect of different fiber volume fraction on the modal parameters of laminated composites was analyzed. The experimental results show that with the fiber volume fraction increasing, the natural frequency of laminated composites becomes larger and damping ratio becomes smaller. The fiber volume fraction is greater, the peak value of natural frequency becomes higher and the attenuating degree of acceleration’ amplitude becomes slower.
Structure and Properties Research of Multi-Antibacterial Polyamide Fibers
Authors: Sun Wei Wei , Zhang Hua , Zhou Yong Kai
Published: September 2011

To explore the effect of multi-antibacterial powders on the polyamide fibers, we analyzed the structure and properties of the polyamide fibers in this paper, which have features of antibacterial, far-infrared emission and negative oxygen ions emission. The effects of adding multi-antibacterial power were tested by Scanning Electron Microscopy and spectrum tests, X-ray diffraction, thermal analysis and infrared spectroscopy. Our data indicated that multi-antibacterial polyamide fibers have excellent antibacterial effect, good far-infrared emission and the negative oxygen ions emission features, while have little affect on polyamide fibers’ structure properties.
A New Test Method for Weft Tension in Shed on Air-Jet Looms
Authors: Ma Hong Li , Leng Li Xia , Zheng Zhi Yu , Zhou Xiao Hong
Published: September 2011

During weaving, broken picks and irregular pick always lead to loom stop and cloth defect. Weft tension is one of the important factors. This paper introduces a kind of method that can be used to measure weft tension when the weft is in the shed on the loom. The weft tension in shed of 296.5 dtex + 70 D spandex covering combed cotton yarn was be measured on the TaiTan TT-800 air-jet loom, and the results we got is sound. It is seen that the method we used effectively solves testing weft tension in shed on air-jet looms.
Manufacture of Composite Nanofiber Mats with Fiber Diameters Grads by Electrospinning for Filtration Use
Authors: Guo Sha Sha , Jin Xiang Yu , Wang Hong , Ke Qin Fei
Published: September 2011

The objective of this study is to prepare a filtration material with fiber diameter grade by electrospinning technique using meltblown nonwovens as collecting materials. The average fiber diameter of PET electrospinning in the top layer was 309.60nm and PET meltblown nonwoven in the bottom layer was 1.82um respectively. And this structure leads to the average pore size of electrospinning-meltblown composite material was 0.73um while it is up to 5.36um for the PET meltblown nonwoven. This design is especially good for high accurate filtration such as cells filtration, hydronium filtration.
Study on the Tensile Properties of the High-Performance Cored Rope
Authors: Zhao Qian Juan , Jiao Ya Nan
Published: September 2011

The tensile property of two-dimensional (2-D) braided cored ropes with high-performance is investigated and found that braiding angle has an evident fluence on the tensile characteristic.In the skin-core structure, the core yarns are straight and parallel with each other ,and have a larger percentage than those in other style of cored rope. The tensile strength and breaking elongation of the samples with different braiding angle is tested by Shimadzu universal testing machine. The load-displacement curves of the rope are drawn and analyzed. It shows that of the tensile fracture mechanism is different from the other structural ropes, and the straight state of the core yarns leads to higher utilization of fiber strength. The results also indicate that braiding angle has a great influence on the strength and breaking elongation of cored rope. In the five samples, the sample with 30°has the both ideal tensile strength and ideal elongation. Beyond the angle, the greater braiding angle is, the much more closely the core yarns are wrapped. The greater friction between fibers of core yarn decreased motion of the fiber in core yarn, some of them was fractured before all the yarns were straighten. The utilization of the braiding yarn fiber strength decreased.