bluuebunny/crossref_metadata_2025 huggingface dataset:
Ultrasonic-Assisted on the Turning of Inconel 718 by Taguchi Method
Authors: Chen Ding Yeng , Tsao Chung Chen , Lin Mao Yong , Tsai Che Hsiung , Hsu Chun Yao
Published: October 2012

This paper presents an experimental investigation on the turning of Inconel 718 using tungsten carbide and cermet insert tools with ultrasonic-assisted. The Taguchi method as well as an L18 orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) are employed to examine the performance characteristics of the turning operations. The effect of the machining parameters (cutting tool, depth of cut, cutting speed, feed rate, working temperature and ultrasonic power) on roundness and flank wear in the turning operations are studied. For roundness, depth of cut (σ = 38.40 %) and feed rate (σ = 22.59 %) were recognized to make significant contributions. For flank wear, the significant contribution order was cutting tools (σ = 51.16 %) for different materials, follow working temperature (σ=22.37 %), depth of cut (σ = 13.59 %), and ultrasonic power (σ = 5.79 %). Cutting with ultrasonic-assisted improves roundness by 17.78 % to 45.73 %, and improves flank wear by 26.52 % to 46.26 7%. Finally, turning experiments with 5-20 nm nano-particles cutting fluid were investigated. The experimental results indicated the cutter-workpiece friction force is noticeably reduced and cutter service life is prolonged.
Experimental Study on Minimum Quantity Lubrication in Mechanical Micromachining
Authors: Li Kuan Ming
Published: October 2012

Mechanical micromachining is a promising technique for making complex microstructures. It is challenging to apply mechanical micromachining in the industry due to the low strength of micro tools. Therefore, it is not easy to accurately control the product dimension error and to raise the production rate. In this paper, the applications of minimum quantity lubrication (MQL) in micro-milling and micro-grinding are presented. MQL is considered as a green manufacturing technology in metal cutting due to its low impact on the environment and human health. This study compares the tool wear and surface roughness in MQL micromachining to completely dry condition based on experimental investigations. The supply of MQL in vibration-assisted grinding is also studied. It is found that the use of MQL results in longer tool life and better surface roughness in mechanical micromachining.
Removal Analysis for Multi-Axial WEDM and Ultrasonic Assisted WEDG Processes with Augmented Rotational Axes
Authors: Hsue Albert Wen Jeng , Wang Jun Jie , Chang Chia Hun , Chuan Yin
Published: October 2012

Rotational axes augmented to general Wire Electrical Discharge Grinding (WEDG) and to the cylindrical wire EDM processes (CWEDM) are reported in this study. On their removal mechanism, a quantitative analysis based upon wire EDM discharge-angle is proposed to clarify comprehensive understanding of the novel mechanisms. The proposed quantitative analysis provided a better understanding for multi-axial WEDG and WEDM processes. Besides, an ultrasonic assisted UA-WEDG system associated with a conic oil cup was then developed in this study to improve the machining efficiency and the surface integrity by improving debris processes. Its significant effects on dressing processes of micro tools were verified experimentally and some removal saturation for both configurations were discussed. Dressing effects meso-scaled rod and screw by both CWEDM and WEDG mechanism were also compared and discussed.
The Study on Evaluation of Hybrid Drilling Command under Deep Hole Drilling
Authors: Huang Jen Ching , Wu Wei Piao
Published: October 2012

The hybrid drilling command was proposed in this study. The hybrid drilling command is established by combined the merit of G73 (high speed peck drilling cycle) and G83 (small hole peck drilling cycle) using custom macro command. The concept of hybrid drilling command is to divide the total drilling depth into several distances and its distance is shortened gradually. The drilling chip is breaking with the G73 in the distance between each one and banishing from the hole with the G83 after drilling a distance each time. The evaluation on the merit of hybrid drilling command was carried out by deep hole drilling test on CNC machine center. After experiments, the hybrid drilling command can reduce wearing, extending the tool life of the driller and shorten processes time.
Superplastic Forming Characteristics of a Fine-Grained Cu-Based Shape Memory Alloy
Authors: Hsu Chin Chuan
Published: October 2012

The influences of temperature and pressure on the blow forming of CuZnAlZr sheet was investigated under free bulging conditions using argon gas. The effects evaluated were the dome height, measured at the dome apex; the specific thickness, the ratio of the actual thickness to the initial thickness; and the thinning factor, the ratio of the actual thickness to the average thickness. The results show that the dome height and the rate of change of dome height with respect to time, dh/dt, increase with increasing temperature and/or pressure. The specific thickness decreases with increasing fractional height (the ratio of the height of a given point above the base line to the height of the apex), and the specific thickness at the apex decreases with increasing temperature and/or pressure as well. The thinning factor decreases with increasing fractional height. Furthermore, this decrease becomes more significant with an increase in either the forming temperature or pressure. The thinning factor at the apex, as a function of the height to base ratio for all conditions falls into the region between m=0.3 and m=0.75 curves.
Tool Wear in a Ceramic Microdrilling Processing Using Image Processing Methods
Authors: Chang Dar Yuan , Su Kuo Ho , Deng Chyn Shu
Published: October 2012

A microhole array is a critical feature on a probe head for microprobe positioning in vertical probe cards. The precision of fabricating microholes affects the final positions of needle tips, and has a significant influence on the correctness of testing results. In the industry, the probe head is made of ceramic and the microhole array is mainly machined by a mechanical microdrilling process. Thus, measuring tool wear and the precision of the microhole is an important task in probe head fabrication. Only then can the functions of probe card be mastered effectively. This study presents a computer vision system that uses image processing methods to evaluate the microdrill wear. Five experiments with different drilling length and two trials of long-drilling were implemented. Wear measurements of the cutting lip and wear land discussed by image methods provide practical references for ceramic microdrilling.
A Study on the Inner Wall Spiral Polishing with Magnetic Force
Authors: Chen Wei Chan , Yan Biing Hwa
Published: October 2012

The spiral polishing mechanism in the present experiment employed a turning screw rod to drive the SiC and the steel grits. With a powerful magnet set around the workpiece interacting with the steel grits, the SiC abrasives were driven and then achieve the surface’s polishing effects. The best parameters combination was discussed with the control of magnetic flux density, size and weight of SiC particles, weight of steel abrasives, viscosity of silicon oil, turning speed of spindle, as well as machining time and their influences on the surface roughness. The effects of each machining parameter on the appearance of workpiece surface were also studied. Based on the results of the experiment, with the increase of machining time, the fluidity of the abrasives becomes better, and thus higher quality of polishing surface could be expected after the process of precision spiral polishing. The results also showed that the best polishing surface was found when the magnet of magnetic flux density was controlled at 90mT, particle size at 12μm, 110g of SiC grams, 60 grams of polystyrene balls, silcon oil at 1000 mm2/s viscosity, and the screw revolution speed at 3500 rpm. The surface roughness was successfully improved from 0.9μm to 0.134μm.
Three Dimensional Finite Element Analysis on Neck-Spinning Process of Thick-Walled Tube at an Elevated Temperature
Authors: Huang Chi Chen , Fan Hsin Yen , Hung Ching Hua , Hung Jung Chung , Lin Chia Rung
Published: October 2012

Tube spinning is a metal forming process used to manufacture axisymmetric products. This study chose a seamless thick-walled steel tube to manufacture a high pressure vessel. Finite element analysis was successfully applied to the neck-spinning process of a thin-walled tube; however, previous research has not investigated the neck-spinning process of thick-walled tubes. Therefore, the aim of this research was to investigate numerically the neck-spinning process of thick-walled tubes at an elevated temperature. The commercial software Abaqus/Explicit was adopted in the simulation. This paper compares experimental and simulation results on thickness distribution and outer contour of the spun tube. During the final stage, the average deviations between the simulation and experiment were 6.74% in thickness and 4.97% in outer contour. The simulation results correspond with those derived in the experiment.
New Remote Monitoring and Control System Architectures Based on Cloud Computing
Authors: Cheng Jui Yu , Hung Min Hsiung , Lin Shih Sung , Cheng Fan Tien
Published: October 2012

In recent years, cloud computing has become a new trend of Internet applications and can potentially bring benefits and new business models for various industries and applications. In this paper, we first review two traditional Internet-based remote monitoring and control (RMC) architectures, i.e. AVMS (Automatic Virtual Metrology System) for equipment monitoring and ZDPMCS (ZigBee-based Distributed Power Monitoring and Control System) for power monitoring. Then, their corresponding new architectures based on cloud computing are developed. Specifically, a cloud-computing-based intelligent equipment monitoring architecture (CCIEMA) is proposed. The CCIEMA mainly consists of three parts: cloud side-providing various equipment monitoring related cloud services, equipment side-containing several equipment managers for monitoring and controlling equipment, and client side-including various Web-based GUIs for users to interact with the system. Based on the proposed CCIEMA, various prediction models can be created on the cloud and then downloaded to the equipment manager for performing yield rate prediction, machining precision conjecture, and remaining useful life prediction. By the same approach, we also propose a new power monitoring and control architecture based on cloud computing and ZigBee, called CZPMCA, and show its major operational scenarios. The potential benifits of the proposed CCIEMA and CZPMCA are described as well, compared to the tradiotional RMC architectures. The research results can be useful references for constructing various RMC systems using cloud computing.
Parameters Analysis of Line Segment Fabrication on Near-Field Photolithography
Authors: Yang Ching Been , Chiang Hsiu Lu , Lin Jaw Ren
Published: October 2012

This paper proposes the integral formula of exposure energy density during the movement of work piece to investigate the exposure energy distribution on the photoresist surface. The photoresist was divided into finite nodes to combine the integral formulas of exposure energy density to calculate the relative concentration variation of the photoactive compound (PAC) at each finite node of photoresist interior layer. This paper further combines with Mack’s development model and calculates the average full-width at half maximum (FWHM) of near field photolithography. This study conducted sensitivity analysis to determine how adjusting groups of control parameters influences FWHM and working depth (Hmax). Group A, in which the probe aperture was the adjusted parameter, had the most influence, followed by Group B, in which exposure energy/μm was the adjusted parameter, and Group C, in which development time was the adjusted parameter.
Development of Liquid Spray Process in a Rapid Prototyping Machine
Authors: Huang Chi Hua , Hwang Sheng Jye , Lee Huei Huang , Huang Durn Yuan
Published: October 2012

The Rapid Prototyping (R.P.) technology which is used in manufacturing a three-dimensional solid part is based on the layer forming method. Currently, the main streams of commercially available machines use the point or line forming method to create the solid part. A thin polymeric material layer is delivered by a roller or scraper to form a thin material layer for further layer forming. This process won’t be able to control the size of the forming part. In this paper, “Liquid Spray Process” is proposed to use a spray pen to spread a thin layer of polymeric material on the forming bed for further layer forming in a rapid prototyping system. It will decrease time and cost of the current R.P. machines by spreading proper size of thin forming bed. The setup of the system of the automatic spray pen, continuous material supply system, spray parameter settings and man-machine interface control system were discussed in this paper. Furthermore, the Taguchi Methods were applied to find the optimal spray forming parameters including height, velocity, acceleration, control air pressure, atomizing air pressure, fluid flow of spray, material pressure and speed of gear pump. Finally, the minimum uniform coating thickness could reach as low as 25 μm with “Liquid Spray Process” when the optimal parameters were used. The uniformity could be well maintained for both sprays in cross or in parallel directions to form an area of 120 mm × 150 mm with the optimal parameters.
Measurement of Thin-Film Evaporation Heat Transfer for Evaporators with Sintered Powder Wick Structure
Authors: Lee Cho Han , Tsai Yao Yang
Published: October 2012

Two-phase heat transfer devices such as heat pipes and vapor chambers are composed of an evaporator, an adiabatic section and a condenser. For the dry-out prevention and capillary purpose, adiabatic sections and evaporators are covered by wick structures. Common wick structures are grooves, mesh, sintered powder and their combination. Combining with the wick structures, the major phase change effects on evaporators are thin-film evaporation. For the research between parameters of wick structure and evaporator performance, we developed a facility to measure the heat transfer on evaporators. To ensure the least heat losing, the path of heat flux and test condition were designed with several thermal guards. A pressure control system was established with balance mechanisms to maintain a stable condition of low pressure. Since temperature differences are very fast while the major phase change effect is thin-film evaporation, a high speed data acquisition system was used. Based on this test platform, the performance of evaporators can be determined at specific conditions.
Fatigue Behavior of Swept Spot Friction Welds in Lap-Shear Specimens of Alclad 2024-T3 Aluminum Sheets
Authors: Su Zheng Ming , He Ru Yi , Lin Pai Chen , Aoh Jong Ning , Chiou Yung Chuan , Dong Kent , Tang Tony , Huang Bob
Published: October 2012

Failure modes of swept spot friction welds in lap-shear specimens of alclad 2024-T3 aluminum sheets are first investigated based on experimental observations. Optical and scanning electron micrographs of the welds before and after failure under quasi-static and cyclic loading conditions are examined. Experimental results show that the failure modes of the welds under quasi-static and cyclic loading conditions are quite different. Failure modes of swept spot friction welds depend considerably on the weld geometry, microstructure, and load amplitude. A fatigue crack growth model based on the paths of the dominant kinked fatigue cracks is developed to estimate the fatigue lives of the spot friction welds. The global and local stress intensity factors for finite kinked cracks, the stress intensity factors for finite transverse cracks, and the Paris law for fatigue crack propagation are used. The fatigue life estimations agree well with the experimental results.
RFID-Enabled Object Relationship Identification
Authors: Hou Jiang Liang , Cheng Hsiu Hui , Lin Hung Lung
Published: October 2012

In the last decade, RFID (Radio Frequency Identification) technology has been applied in many applications to support the routine operations. These methods about RFID applications focus mainly on the specific issues in the application domains. In this study, a generic object relationship identification and guidance model is proposed to identify the relationships between objects (including human beings, physical goods and locations) and guide the objects toward their destination based on their predefined objectives via the RFID. Eight general types of object interactions including searching, blocking, no-in, no-out, conflict, intersection, coincidence, and support, are considered to identify object relationship and guide the objects. The proposed scheme consists of three modules namely object type combination (OTC), object relationship identification (ORI) and object guidance (OG). Moreover based on the proposed methodology, an Object Relationship Identification and Guidance System (ORIG-System) is developed and simulated environments are established in order to verify the feasibility and performance of the proposed model. As a whole, this study provides a methodology and system to provide effective support to the routine operations in distinct application domains via the RFID technology.
A Three-Dimensional Atomic-Scale Finite Element Model for a Copper Nano Thin Film Subject to a Uniaxial Tension
Authors: Chiu Jinn Tong , Lin Yeou Yih , Lo Ship Peng
Published: October 2012

A three-dimensional atomic-scale finite element model was developed in this paper for simulation of a nano-scale uniaxial tension. First, the Morse’s potential function was used to simulate the forces acting among particles. Furthermore, a non-linear spring and dashpot element with a lumped mass was used to establish an atomic model. The elongation of the spring at fracture was used to simulate the radius of fracture of the atomic link. This method was applied to investigate the proportional tension test of an idealized FCC single crystal copper film along the x direction. The study includes the stress-strain curve, the effect of five categories of atomic distances on the stress-strain curve; and the effect of strain-rate on the stress-strain curve. The results showed that (1)the simulated maximum stress for copper is very close to 30.0GPa, which is also the value of maximum equivalent stress obtained by Lin and Hwang [6], verifying the validity of the calculation of this paper. In the tension test of copper, necking develops gradually and eventually leads to fracture. The simulated deformed material element during each stage of deformation was similar to that simulated by Komanduri et al.[2](2)the influence of =6.2608 on the five categories of atomic distance considered was limited and it may be neglected to save computation time,(3)when the strain-rate was large, the resistance to deformation was also large, leading to an increase in the yield stress and fracture stress.
Development of a Micro Photoluminescence Measurement System for the Spectrum Inspection of Gallium Arsenide/Gallium Arsenide Phosphide (GaAs/GaAs1-X Px)
Authors: Xie Mu Chiau , Shiou Fang Jung , Tang Geo Ry , Chuang Shui Fa
Published: October 2012

This article mainly focuses on the spectrum measurement of the LED semi-conductor material Gallium Arsenide/Gallium Arsenide Phosphide (GaAs/GaAs1-x Px), using Photoluminescence (PL) method, by integrating the optical path design, the mechanism design, the motion control, the image processing, and the positioning technology to accomplish the development of automatic measurement system. The innovative method of micro-photoluminescence (µ-PL) is proposed in the optical path design. A microscope objective was adopted to focus the laser light to a tiny area and by enhancing the strength of laser light unit to increase the sensitivity of the luminescence. In the past, the examination of PL was used to do the image positioning and to collect the luminescence manually in two different platforms. The developed system integrates these two light path systems, PL and image positioning, as one machine. As a result, the image positioning and luminescence measurement can be done in one machine simultaneously, to save manpower and to avoid the manual positioning error.
Computational Model for a High Speed Train Running on the Railway Structure Including Derailment during an Earthquake
Authors: Tanabe Makoto , Wakui Hajime , Sogabe Masamichi , Matsumoto Nobuyuki , Gotou Keiichi , Tanabe Yasuko
Published: October 2012

The computational method to solve for the dynamic interaction between a high-speed train and the railway structure including derailment during an earthquake is given. The motion of the train is expressed in multibody dynamics. Efficient mechanical models to express contact-impact behaviors between wheel and the track structure including derailment during an earthquake are given. Rail and track elements with multibody dynamics and FEM combined have been developed. A nonlinear spring element based on a trilinear elastic-plastic material model with the kinematic hardening is given for a concrete railway structure under cyclic loads during an earthquake. The motion of a railway structure is modeled with various finite elements and also with rail and track elements. A modal reduction is applied to solve the problem effectively. An exact time integration scheme has been developed that is free from the round-off error for very small time increments needed to solve the interaction between wheel and railway structure including derailment during an earthquake. Numerical examples are demonstrated.
Trends in Sustainable Design Centered Manufacturing
Authors: Wang Steve Hsueh Ming
Published: October 2012

This paper illustrates a new manufacturing capability which is driven by design and sustainability. Several objectified design cases by using or waiting the new insertion of manufacturing technologies have been discussed. The cases of the leading products or systems in the world include Kazuo Kawasaki eyeglasses, Mac ibook, Boeing 787-8, integrated circuit, plasmafication, and information based medicine. The research also forecasts the value increased the activities of design centered manufacturing. After defining the scope of sustainability, an analysis of a strategy of a sustainable organization is also included. The research results predict that the competitive advantages of new products come not only from the advanced manufacturing technologies but also from a sustainable design centered manufacturing approach.
Flaw Classification of Flexible Copper Clad-Laminated Sheet
Authors: Chiou Yih Chih , Liang Yu Teng
Published: October 2012

This study investigated the classification error rate of eleven flaws commonly occurred in copper foil. The goal was to online identify the type of the flaw being discovered in order to trace the source of the flaw and act correspondingly. The misclassification rates of four popular classifiers were investigated and compared. The results indicated that the best classification rate can be obtained by choosing Support Vector Machines as the classifier and employing all the ten features. The resulting low classification error rate of 4.41% proved the effectiveness of the derived classifier as well as the suitability of the chosen features.
Analysis of Wear Behaviour of Sintering Carbide against DLC Coated and Nitriding Steel
Authors: Chen Tzung Ming , Lin Yuan Ching , Chen Jiun Nan
Published: October 2012

In this paper, tribological behaviours for sintering carbides and DLC/nitride film are discussed. During the wear test, two types of hardened steel are setting to sliding against eight series of carbide specimens in order to compare the wear mode and evaluate the wear performance of sintering carbides, which are made by different process parameters. The experiment result shows that a density ratio of sintering carbide between 86% and 99% does not have obviously different effect on wear resistance. Moreover, molybdenum binder with high diffusibility can improve the wear performance of tungsten carbide, but wear performance of titanium carbide is dependent on the amount of nickel/cobalt binder, separately. On the other hand, SAE52100 substrate absorbs the heat of friction and maintains the coated diamond-like carbon film in an excellent wear performance.
The Influence of Blanking Process by Superimposing Ultrasonic Vibrations
Authors: Yeh Wei Ching , Chu Tsu Hsiao
Published: October 2012

The application of ultrasonic vibrations superimposed on wire drawing, deep drawing, upsetting and rolling has been developed in the literature before. Few attempts have ever been made to develop the application of the ultrasonic vibration to blanking process. This paper reports an investigation into the effects of the superimposed ultrasonic vibrations of the punch during the blanking process by experimental design and response surface methodology. The effects of the ultrasonic vibration on the punch load and edge profile are systematically studied. The results show ultrasonic vibrations can decrease the punch load and improve the quality of edge profile.
Characteristics of Micro EDM for Insulating Aluminum Nitride Ceramics
Authors: Kaneko Kensei , Fukuzawa Yasushi
Published: October 2012

Aluminum Nitride (AlN) ceramic materials have high thermal conductivity and electrical insulation, prompting consideration of their use as a semiconducting material. Although AlN should be machined with a high accuracy of form and dimension to achieve products and components with requisite precision, mechanical and other machining methods such as the laser method cannot be used because of the brittleness and high thermal conductivity of AIN. Recently, we have succeeded in machining many insulating ceramics by sinking (SEDM) and Wire-Electrical Discharge Machining (WEDM) with the assisting electrode method. We have already machined many insulating ceramic materials such as Si3N4, ZrO2 and Al2O3. However, inferior machining characteristics were obtained with AlN than with other materials. In this study, the effects of several electrical discharge conditions were examined to obtain better machining properties, such as high material removal rate and a low electrode wear ratio. It was found that machining time decreased with an increase in capacitance, while the electrode wear ratio increased. The electrode wear ratio of the W electrode was low, suggesting that it is suited for accurate machining of AlN. Additionally, the electrically conductive layer was analyzed using Energy Dispersive X-ray Spectrometry (EDS) and X-ray Diffraction (XRD). As a result, the architectural component of the EDMed AlN surface is considered mostly Al that is resolution of the workpiece. Therefore, in the EDM of AlN using the assisting electrode method, machinability using deionized water may be superior to dielectric oil. To investigate the effect of the dielectric working fluid, AlN was machined using deionized water and dielectric oil. In the case of machining with deionized water, the removal rate was faster and electrode wear ratio was lower, compared to dielectric oil.
Design of Plane Curvilinear Welding Manipulator Control System Based on Motion Controller
Authors: Li Ru Xiong , Jiao Song Hua , Wu Yan
Published: October 2012

The 3-D welding manipulator use the hardware of motion controller、IPC 、 stepping motor system and so on, motion control card was used to control three stepping motor, the curved beam design a append structural with“ ”shape to avoid splash in the welding process. In software development, use windows multithread technology to make sure the gesture demand of welding gun perpendicular to welder all the time. Practice has proved, the manipulator can interpolate welding curve and realize accuracy controlling of welding-torch position and gesture in the whole welding process.
A Smart Motor Speed Controller of Electrical Car
Authors: Zhang Quan , Yang Yong Cai
Published: October 2012

Motor operates as the power source of the vehicles, which is one of the most important parts in the vehicle system. This paper is going to find out the speed control method of the DC motor of Golf electrical cars from both theory and practice. A virtual instrument, which produces the Pulse Width Modulation (PWM) signal, is developed with LabVIEW to control the motor speed. This smart motor speed controller differs from the traditional mechanical control of DC motor in daily life, and is instructive and significant as a new speed control method of vehicle motor.
Application of SAE J1939 Protocol in Armored Vehicle Fault Diagnosis
Authors: Xie Yong Cheng , He Fang Jun , Li Guang Sheng , Wei Ning
Published: October 2012

The SAE J1939 is a typical CAN bus network communication protocol of integrated electronic system of armored vehicles, which adopts the PDU as a data transmission unit. The agreement can quickly parse out the meaning of the received data to according to data definition; The fault code is used to transfer fault diagnosis information while the SAE J1939 is employed, from which equipment faults can be easily obtained. In this paper, the protocol is described and applied to fault diagnosis application of the engine electronic control box in the armored vehicle. The results proved the protocol is reliable and effective.
Cooling Simulation of an Injection Mold with an Embedded Insert
Authors: Xu Mi Ting , Zhang Shi Xun , Shi Xian Zhang
Published: October 2012

This paper proposes a numerical model of cooling analysis of an injection mold that has an embedded insert. The Boundary Element Method (BEM) is employed because of its popular usage in this area. The key problem in model building is how to involve the independent surface between mold and insert into the BEM equations and how to give the natural boundary conditions on it. This problem is solved by using coupling BEM which provides an attractive alternative in that the natural boundary condition is shifted to the surface between part and mold. So, instead of using the finite differentiation method, the boundary condition can be determined analytically. This is useful in improving the accuracy of cooling analysis.
Failure Analysis of the Pushing and Retracting Pinion of Mechanical Single Bucket Excavator
Authors: Qiu Chang Ming , Wang Yan Feng , Guo Li Jun , Liu Jiu Yan
Published: October 2012

The single-bucket excavator is one of the major equipment of the open-air mining with a long history of earth and stone mining and transhipment. The working conditions of its pushing and retracting pinions (also called gears) are very poor and they are wearing parts. Use WD400 excavator as an example, the paper specific analyze the failure of the pinions, point out the measures to extend their life from the point of view of structural design.
The PC Integrated Machine Drop FE Analysis Using Abaqus
Authors: Yang Hui Xiang , Weng Hai Zhou , Zheng Yu Qing
Published: October 2012

The paper simulated integrated machine drop process by Abaqus / Explicit and extracted its displacement and strain results. We forecasted possible structural weakness and compared the results with the test results. The FE simulation analysis results were verified correct.
Design of an Online Maintenance Device for Batteries
Authors: Zhu Shi Shun , Yang Gang , Luo Su Jun , Zhu Dao Wei
Published: October 2012

In this paper, the sulfation failure mechanism on negative plates of lead-acid batteries and the pulse-repairing technology are analyzed, and an online automatic maintenance device based-on the Boost converter is designed. The device uses ATmega16 microcontroller as its controller. The test results show that by adjusting the hardware devices and programs the frequency and amplitude of charge-and-discharge pulses can be changed. And when the battery voltage is too low the device can generate sound and light alarm. The device meets the design requirements.
The Natural Frequency Analysis of Wind Turbine Gear Rotor System
Authors: Lian Li Ming , Liu Gui Min
Published: October 2012

The Natural frequency of wind turbine gear rotor system was analyzed by the Ansys11.0 software. It was found that the deformation of three-order was larger than others in low-order mode, through that a helical gear’s mode of weak links of the gear transmission system was analyzed. The result is an important theoretical support to prevent the resonance of gear rotor system.
Finite Element Static Analysis of Cylinder Mechanism in Carding
Authors: Chang De Gong , Zhang Hong Tao , Yang Fu Qin , Zong Rong
Published: October 2012

In this paper, a three-dimensional solid model of the cylinder mechanism which is used in carding machine was created by Pro/E. Then the solid model was introduced into ANSYS Workbench and the stress analysis was carried out by using finite element method. Finally, the analysis result was assessed by means of the stress contours. As shown in the contours, the maximum stress concentration parts of the cylinder mechanism were obtained. All above of these provide the theoretical basis for further research of the cylinder mechanism, especially for the improvement of the structure and the subsequent optimization as well as the heat treatment of the materials.
Research on Clamping Body of the Hydraulic Climbing System of Caliper Type
Authors: Zhou Hai Ying , Liu Kai , Jiang Ming
Published: October 2012

To investigate the appropriate inclined angles, spacing between caliper and square steel satisfying the requirement of caliper switching mechanism and the appropriate tooth parameters, the relation of inclined angles of caliper and meshing force is analyzed. And the hardness parameters of caliper and square steel are also analyzed. The appropriate tooth parameters are determined based on hardness parameters of caliper and square steel and tooth parameters of caliper.
Energy-to-Peak Mode-Dependent Filter Design for Discrete-Time Markovian Jump Linear Systems with Intermittent Measurements
Authors: Zhao Hai Yan , Li Wen Bai
Published: October 2012

In this paper, we investigate the robust energy-to-peak filtering for discrete-time Markovian jump linear systems with intermittent measurements. The intermittent measurements are modeled as a Bernoulli processwith a fixed probability. By defining the filtering error, an augmented estimation error system is obtained. Due to the existence of the stochastic variables, the exponentially mean-square stability and the robust energy-to-peak performance are both studied for the estimation error system. The widely-used Lyapunov theory is employed to investigate the stability and the energy-to-peak performance. Sufficient conditions expressed in the form of matrix inequalities are obtained. Since the estimator parameters and the Lyapunov weighting matrix to be determined are coupled with each other, a partition technique is utilized to decouple the estimator parameters and the Lyapunov weighting matrix. After defining several new parameters, we develop the design approach for the mode-dependent energy-to-peak estimator. The estimator parameters can be derived by solving a set of linear matrix inequalities. Finally, a numerical example is used to show the effectiveness of the proposed design approach.
Research on Homogeneous Earth Dam Structure Force Analysis
Authors: Liu Yun , Li Ye
Published: October 2012

Homogeneous earth dam is a common structure in hydraulic engineering, this paper adopts universal finite element calculation software to carry out three-dimensional finite element simulation analysis for homogeneous earth dam of Qianxian reservoir. Computer is fully used in calculation process, researching variation law of the dam’s stress and displacement in construction process and operational process. The research results offer some reference for design and construction of homogeneous earth dam.
Study on Heat Transfer Characteristics of Heat Pipe with Axial “Ω”-Shaped Microgrooves
Authors: Yang K.M. , Wang N.H. , Jiang C.H. , Cheng L.
Published: October 2012

Heat pipes are devices capable of very high heat transfer and have been widely used in many thermal management applications. Heat pipe with axial ‘‘Ω”-shaped grooves combines a high capillary pumping pressure with a low axial pressure drop in the liquid. An experimental investigation of thermal characteristics of heat pipe with axial ‘‘Ω”-shaped grooves was presented in this paper. The experimental results showed that the work temperatures affect the equivalent heat transfer coefficients obviously, and 20 °C is chosen to be the most appropriate working temperature for heat pipe in present study. The working temperature affects the operational characteristic of heat pipe significantly. When the working temperature is 20 °C, the most efficient working input power is from 80 to 140W. The tilt angles affect the equivalent heat transfer coefficients not so obviously.
Static Analysis on Waist Fitting of Auxiliary Manipulator in Punch
Authors: Chang De Gong , Wang Juan , Wang Cui Cui
Published: October 2012

Based on ANSYS Workbench finite element analysis software, static analysis including the analysis of stress and deformation is carried out for waist fitting of auxiliary manipulator in punch. The stress contours diagrams and the deformation contours diagrams of the waist fitting are obtained, so as to get its stress distribution and deformation. According to the results of analysis, the waist fitting non-installation size is optimized. Therefore motion performance of the manipulator is optimized. The research of this thesis provides the theoretical basis for the further study of the waist fitting, especially in the improvement of the structure.
The Structure Design and Motion Simulation for Drilling Jumbo Based on UG
Authors: Shan Gen Li , Zhou Yun Guang , Huang Peng Hui
Published: October 2012

UG software is used to design the mechanical structure of a drilling jumbo, which describes the overall structure, structure and operating principle of the key components. The virtual assembly and motion simulation have been done under the UG environment, the drilling jumbo’s booms can find the position of the holes through the motion simulation, the accuracy of the calculated data is proved and the design period is also shorten, solve the interference of the two booms, which also provides new research methods and basis for CNC drilling jumbo.
Precession Characteristics Analysis of Ballistic Target Based on Non-Ideal Scattering Centers
Authors: Ma Qi Lie , Lu Wei Hong , Feng Cun Qian , Zhang Jie , Wang Zhe
Published: October 2012

Precession characteristics are very important for ballistic target recognition. It is theoretically approved that the radar echo is sinusoidal frequency modulation signal when the micro-motion of scattering centers is the same as warhead itself. But this assumption disagrees with the fact. To solve this problem, model of precession target is set and the expression of the micro-Doppler of the non-ideal scattering centers is obtained in the paper. Then, precession characteristics of warhead are presented in the end of the paper. Finally, the correctness of theoretical analysis is validated through the simulation results.
Study on Optimization Design Method of Drilling Fixture of the Steering Knuckle of Vehicles
Authors: Li Wen Xing
Published: October 2012

Optimization design method of drilling fixture of the steering knuckle of vehicles was studied. Based on its equivalent mechanical model established, the efficient and accurate optimization design method was proposed. Its finite element model of the optimization design was established. Its optimization structure was obtained. This optimization structure was applied to the drilling fixture of the steering knuckle of a vehicle. The weight after optimization design was reduced by 1.5% than its initial design, and this optimization drilling fixture does work well. The method and basis are supported for its design and performance analysis.
Vulnerability Analysis of Typical Anti-Ship Missile
Authors: Wang Cheng Cheng , Xie Xiao Fang , Zhang Long Jie
Published: October 2012

At present the naval gun is the main force of short-range anti-missile. The small caliber naval guns’ impact and penetration effect are the main factors for damaging anti-ship missile. In this paper, the damage mechanism of the anti-ship missile and the vulnerability of a typical missile are studied. On the basis of that, vulnerability function of anti-ship missile is put forward and vulnerability model of one of the important parts of the missile with typical material is built and simulated. It’s useful to the study of the further model of vulnerability analysis of whole anti-ship missiles.
Study on the Simulating for Temperature Control System of the First Station of Heat Exchanger for Heating Network Based on Fuzzy PID of Double S7-200PLC
Authors: Ma Zhuang , Zhou Hao Miao , Zhang Yi Yang
Published: October 2012

This paper takes the first station of heat exchanger for heating network as an example. Because of the properties of nonlinear, large inertia, pure time – delay, it is controlled by the master slave control system based on double S7-200PLC. The accurate control of the outlet temperature of heat exchanger was realized by fuzzy PID control algorithm. The MATLAB simulation results show that the system has high control precision that it can be satisfied with the demands.
Finite Element Analysis of Long-Pile Replacement Rate Changes on the Impact of the Long-Short Composite Piled Foundation
Authors: Li Wen Chao , Ge Xin Sheng
Published: October 2012

In this paper, combining specific project, the overall elastic-plastic model under the joint action of the upper structure and foundation in the long-short composite piled foundation is established using ANSYS. Consider the effects of the long pile replacement rate to the long-short composite piled foundation.
Design of High Temperature and High Pressure Petroleum Bullets Performance Test Device
Authors: Li Xiao Qing , Liu Ren Qiang , Hua Da Zhong , Liu Xiao Yan
Published: October 2012

A high temperature and high pressure reaction autoclave for petroleum bullets performance test is designed in this paper. Heat transfer in both vertical and horizontal reaction autoclave structure is analyzed and calculated. Considering system heat loss, heating power of these two kinds of devices is calculated in different test time. Meanwhile, temperature fields in these two kinds of autoclave are simulated. According to the comparison result, the authors come to the conclusion that temperature field in vertical reaction autoclave is uniform and can meet design demand with a temperature difference less than ±5°C. Horizontal reaction autoclave in which there are small eddies in air interlayer cannot meet demand because eddies enhance the convection heat transfer in local area. Based on this conclusion, a reasonable reaction autoclave structure can be designed.
A New Method Applied to the Multi-Parametric Nonlinear Compensations of Computer Numeric Control Bender
Authors: Zeng Wen Zhou , Wu Li Ming , Luo Xin
Published: October 2012

Complex Moving Least Squares and its key attributes as basis functions and support region radius were discussed and studied in this paper. Owing to the weak performance of traditional Moving Least Squares when applied to asymmetrical sampling points set, an improved Moving Least Squares named dynamic radius Moving Least Squares was designed, whose support regions radius at fitting point dynamically adjust as the density of local point subset. At last, it is applied to multi-parametric nonlinear compensation of computer numeric control bender through comparative fitting experiments and simulations on couples of data compared to traditional Moving Least Squares. The results of experiments and simulations indicate that the new algorithm makes a great progress on computational complexity, fitting smoothness and fitting accuracy, especially the accuracy in dense points region compared to traditional Moving Least Squares.
Research on Oil Separator Control and Simulation
Authors: Li Xiao , Zhang Jin Hai
Published: October 2012

With the rapid development of computer technology and electronic information technology is widely used, and application of computer simulation technology is increasingly popular. Engine room Simulator is a typical application of computer simulation technology in the field of maritime, has become an important means of training, assessment of the majority of the crew. Among them, marine oil separator system is an important part of marine Simulator. Simulation program for marine oil separator system timing control simulation for oil separator, and simulation for common failures.
Numerical Simulation and Die Design for Vibration Extrusion of Spur Gear
Authors: Lin Qiong , Meng Bin , Yang Qing Hua
Published: October 2012

The numerical simulation for spur gear vibration extrusion is performed in this paper. The metal flow characteristic and load-stroke relationship during forming process is analyzed and then compared with traditional metal extrusion process. The results revealed the axial vibration of cavity die can both reduce forming load and benefit for metal flow, which could achieve better forming quality. Finally according to the processing requirements, the vibration generator and whole extrusion die structure is designed.
A Review of Control Research on Switched Reluctance Generator
Authors: Zhao Song , Wang Xiao Fei
Published: October 2012

Switched reluctance motor is widely used in industrial and commercial uses, especially in harsh conditions. In this paper, the power generation control strategy of switched reluctance generator are given and analyzed. Five control strategies are as follows: Angle Position Control, Current Chopping Control, PWM Control and Exciting Voltage Control, Full Conducted Current Chopping Control. The simplicity & compactness of switched reluctance motors suggests the possibility using on special environment such as wind power generation.
Boundary Conditions for Torsional Circular Shaft with Two-Dimensional Dodecagonal Quasicrystals
Authors: Zhao Bao Sheng , Wu Di
Published: October 2012

Through generalizing the method of a decay analysis technique determining the interior solution developed by Gregory and Wan, a set of necessary conditions on the end-data of torsional circular shaft in two-dimensional dodecagonal quasicrystals (2D dodecagonal QCs) for the existence of a rapidly decaying solution is established. By accurate solutions for auxiliary regular state, using the reciprocal theorem, these necessary conditions for the end-data to induce only a decaying elastostatic state (boundary layer solution) will be translated into appropriate boundary conditions for the torsional circular shaft in 2D dodecagonal QCs. The results of the present paper enable us to establish a set of boundary conditions.
Parametric Design of Wind Turbine Blades Based on Pro/E
Authors: Wang Xi Cang , Guo Shou Zhen
Published: October 2012

Based on the analysis of formation theories and constructive characteristics of centrifugal fan blade, with advanced 3D mapping design softwares, a integration parametric design is realized by putting the modeling, calculating, mapping and processing into an organic whole with computers, to get accurate drawings and improve design precision.
Shoe-Mounted Personal Navigation System Based on MEMS
Authors: Cui Xiao , Qin Yong Yuan , Zhou Qi , Fu Qiang Wen
Published: October 2012

Shoe-mounted personal navigation system(PNS) based on MEMS is presented aiming at locating a person. Large error remains a problem in a standalone navigation system that uses only low cost MEMS IMU. This paper therefore proposes a approach which integrated with ZUPT and compass heading information in Kalman-based framework. The filter propagates and estimates the errors during the stance phase, which are fed back to the INS for compensating the accumulated error during walking. Finally, the performance of the proposed algorithm are verified by outdoors actual walking experiments of closed-loop path, were undertaken on campus of Northwestern Polytechnical University. The results show that the accuracy of positioning were almost always below 1% of the total traveled distance.