bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study on Micro-Nano Scratching of Mono-Crystalline Silicon Wafer
Authors: Wei Xin , Chen Zhuo , Xie Xiao Zhu , Ren Qing Lei
Published: October 2010

In this paper, micro-nano scratching experiments were conducted on mono-crystalline silicon wafer to investigate the material removal mechanism of silicon. Two loading methods (increasing-loading and constant-loading) were used. The characteristics of the scratching grooves, and the relationship between the groove size and the load were analyzed by observing the surface torography and measuring the groove. The results show that there are four distinct regimes existed with an increasing scratching load: elastic regime, ductile regime, ductile-brittle regime and brittle regime. The critical load of the transition from ductile to ductile-brittle regime can be considered as 120mN, within which smooth scratching surfaces have been obtained by ductile removal. The scratching load has very significant effects on the groove sizes of the mono-crystal silicon.
Research on the Constraint Mechanism of Abrasive Particle of MR Effect-Based Tiny-Grinding Wheel
Authors: Chai Jing Fu , Yan Qiu Sheng , Kong Ling Ye , Li Min
Published: October 2010

To improve the effect of magnetorheological finishing (MRF), it is necessary to control the behavior of abrasive particle effectively in machining process. This article described the machining principle of semi-bond abrasives under the MR effect, then, analyzed the magnetic field of the polishing tool. Based on the magnetic field theory, the constrained model of abrasive particle was established, consequently, the force and the machining behavior of abrasive particle were analyzed. And an experiment was carried out to analyze the effect of the abrasive behavior on the material removal. The results show that the experimental results are identical with the theoretical analysis. Therefore, the control of the particle behavior in process is proved to be available.
CFD Analysis and Experimental Investigation of Jet Orientation in MQL Machining
Authors: Pei Hong Jie , Shen Chun Gen , Zheng Wen Jie , Wang Gui Cheng
Published: October 2010

MQL (minimal quantity lubrication) machining produces almost similar cutting performance to conventional flood supply machining while using much less metal working fluid. To take full advantage of MQL machining and expand its applicability, an understanding of its jet orientation is critical. Through computer fluid dynamics (CFD) analysis of MQL flow field surrounding the workpiece and tool, it was found that a zone of negative pressure (ZNP) existed between workpiece and flank tool face in turning and was in favor of coolant particle arriving at tool tip. Cutting force was minimal and discontinuous chip effect was best of all when spraying from principal flank face and at range of target 20mm.
Study on the Influence of Geometrical Parameters of Abrasive Grains in Abrasive Flow Machining
Authors: Xu Zhong Ming , Luo Yong Wu
Published: October 2010

In order to improve the accuracy of quantitative calculation of abrasive flow machining, the influence of geometrical parameters of abrasive grains on machining is analyzed by representing the geometrical shapes of abrasive grains with three parameters, namely height of abrasive grains, cone angle and wear height, establishing the calculation model of blunt conical abrasive grains for abrasive flow machining, deducing the force formulas of abrasive grains and calculating the maximum cutting depth in the event of smooth flow of abrasive grains in the boundary layer. It is shown by researches that the geometrical parameters of abrasive grains have significant influence on the maximum cutting depth as follows: The maximum cutting depth of abrasive grains increases linearly with the increase of height of abrasive grains, and varies in the form of hump with the changes of cone angle, the cutting depth has the maximum value when the cone angle reaches 60°; The maximum cutting depth of abrasive grains decreases rapidly with the increases of wear height, when the wear height increases to a critical value, the abrasive grains basically lose cutting ability.
Polishing of Small Workpiece with Complicated Surfaces by Electro-Magnetic Grinding Method
Authors: Yu Ke Qiang , Jin Tie Hui , Dong Xiao Xu , Chen Yan
Published: October 2010

Traditional magnetic grinding method has great advantage in polishing small workpieces with complicated surfaces. However, this method has obvious limitation in actual applications. A new method called electro-magnetic grinding which solves defects of traditional magnetic grinding is presented and processing mechanism for small workpieces with complicated surfaces is introduced in this paper.
A Study on the Surface Microstructural Integrity of Ceramics Milled with Abrasive Waterjet
Authors: Feng Yan Xia , Huang Chuan Zhen , Wang Jun
Published: October 2010

In this paper, an experimental evaluation of the surface microstructural integrity of Si3N4 ceramics milled with abrasive waterjet was studied. The results show that the surface residual stress resulting from abrasive waterjet milling process for ceramics is compressive, and the compressive residual stress ranges from negative 203MPa to negative 19.6MPa. The results also show that the water pressure, the standoff distance, nozzle traverse speed and the lateral spacing have strong effects on the surface residual stress. The results also show that there is some enhancement in the hardness of AWJ milling surface, and it is affected by milling process parameters. The micro-topography of the milled surface cross section shows that there is a thin deteriorative layer in milled layer, in which no obvious crack is observed. Since the surface residual stress is compressive and the surface hardness increases, the milled surface deteriorative layer by AWJ could improve the surface quality.
Effect of Material Properties on Aspheric Surfaces Polishing by Compliant Hybrid Position/Force Controlling
Authors: Zhan Jian Ming , Yu Si Hai
Published: October 2010

Generally, aspheric surfaces require extra high accuracy and roughness and need to be polished further after being shaped. Because the interaction between tool and work-piece in polishing process is compliant, rather than the kind of rigid cutting, the machining quality and machining process are closely allied to the physical properties of the work-piece material. A new three-degree-of-freedom hybrid position/force servo polishing system, which is based on universal CNC Lathe, is developed, and the effect of work-piece materials on the polishing process and processing quality of aspheric surfaces is studied after aspheric parts are compliantly polished in accordance with the Preston removal regulation in this paper.
Recent Development of the Aero-Engine Impeller and Blade Surface Polishing Technology
Authors: Gao Hang , Zhao Z. , Sun Y.W.
Published: October 2010

The air compressing efficiency and heat conductance of aero-engine is markedly influenced by the surface micro-morphology and surface roughness of the impeller and blades, which will further affect the thrust weight ratio of plane. To achieve low flow losses, the roughness values of the impeller and blade surface must be below certain limits. Some polishing techniques as final finishing process of the impeller and blades are reviewed and their recent developments are shown in the paper. Further more a new kind of point-by-point NC polishing principle for aero-engine impeller surface, in which surface roughness will gradually change from the inlet to the outlet, are presented.
Temperature Distribution of IFA Polishing Single Silicon Wafer
Authors: Sun Yu Li , Zuo Dun Wen , Lu W.Z. , Zhu Y.W. , Li J.
Published: October 2010

The ice fixed abrasives (IFA) polishing is a potential polishing process in the semiconductor industry to realize superior surface finish and planarity for semiconductor wafers. The key question in IFA polishing is how to keep suitable ambient temperature and melting rate in production process in order to avoid premature failure of the IFA pad. In this paper, effects of ambient temperature (T), pressure in cylinder (Pc), rotary speed of IFA pad (v) and eccentricity of pressure head (e) on temperature distribution and melting rate of the IFA pad are researched. The results show that T should be kept at about 10 °C in order to control the melting rate of the IFA pad effectively and keep longer polishing time. And suitable Pc, e can be kept at 0.075 MPa or 0.1 MPa and 20 mm or 30 mm, respectively. In order to increase IFA polishing efficiency, the rotary speed of IFA pad can be increased appropriately. All the results provide the basis for choosing suitable processing parameters in IFA polishing.
Analysis of Ultrasonic Honing Chatter Vibration Trajectory
Authors: Wang Jian Qing , Zhu X.J. , Cheng Quan , Wang Yan
Published: October 2010

Grinding chatter belongs to non-linear vibration, whose generation mechanism is complex. The eliminating and reducing of vibration are very difficult, which have been one of the hot and difficult problems at home and abroad. Power ultrasonic vibration honing is a special processing that adds secondary ultrasonic into traditional honing. Adding ultrasound not only superimposes high-frequency vibration components on the trajectories, which makes trajectories become very complex, but also makes high frequency ultrasonic vibration elements greatly influence the vibration trajectory of chatter, which makes the stability analysis of ultrasonic honing become more complex, so it is necessary to specially study in vibration trajectories of honing process. Taking axial ultrasonic vibration honing as an example, the paper respectively takes single wear debris, two adjacent wear debris, oilstone as study object to discuss on the variation rules of honing chatter vibration trajectory after adding ultrasonic, and obtains the following conclusions: adding ultrasonic can larger vibration trajectory for single wear debris or two adjacent wear debris on microscopic scales, on the view of macroscopic which is performed as honing depth of oilstone increasing; the effects of adding ultrasonic to chatter depend on the t value; through appropriately adjusting or selecting process parameters and structural ones, chatter can be completely avoided.
The Contact Pressure Distribution and its Effects on the Magnetic Disc Substrate Surface Profiles in Chemical Mechanical Polishing
Authors: Lu Yu Shan , Shu Qi Lin , Wang Jun
Published: October 2010

In order to obtain the contact pressure distribution between the hard disc substrate and the polishing pad and its effects on the profile of polished substrate surface, the elastic contact mechanical model and mathematical equations on the chemical mechanical polishing of the hard magnetic disc substrate are established, and also the relevant boundary conditions are put forward. The contact pressure distribution is calculated with FEM, the polishing experiments are carried out and the surface profiles of polished substrates are obtained. The study results show that the contact pressure distribution on the substrate surface is non-uniformity and the contact pressure in the substrate edge present biggish undulation. Choosing properly the Young’s modulus of the polishing pads and decreasing its Poisson’s ratios can make the uniform area of the contact pressure distribution enlarging and improve the flatness of polished substrate.
Study on Friction Force Distribution on Silicon Wafer Surface in CMP Process
Authors: Su Jian Xiu , Zhang Yin Xia , Du Jia Xi , Kang Ren Ke
Published: October 2010

The friction force on wafer surface plays an important role in removing material of wafer surface and the friction force on wafer surface may have a direct influence on non-uniformity of material removal in wafer CMP process. In this paper, models of friction force on wafer surface were built according to the CMP process. It is proved that the model of the friction force on the wafer surface is correct by the silicon wafer CMP Friction experiment. Then the data fitting of friction model has been done with the experimental data. By the friction force model, the within wafer nonuniformity (WIWNU) of friction force distribution on wafer surface has been obtained with different rotational speed of wafer and polishing pad. The research of this paper is helpful to further understanding the material removal mechanism in wafer CMP.
Statistical Analysis of Cutting Forces in Turning Inconel 718 with Coated Carbide Tools
Authors: Zhu Xiao Li , Zhang Song , Ding Tong Chao , Wang Yuan Wei
Published: October 2010

The experimental study presented in this paper aims to investigate the effects of cutting parameters on cutting forces, and search the optimal cutting parameters for the minimum cutting forces during turning Inconel 718 under dry cutting conditions. Based on Taguchi method, a L25 (53) array was designed to conduct the turning experiments. The experimental results indicate that the best condition for the minimum cutting force components is the combination of 45m/min cutting speed, 0.08mm/r feed rate, and 0.2mm depth of cut. The effects of the cutting parameters on cutting forces are investigated while employing the analysis of variance (ANOVA). Finally, the quadratic regression equations for cutting forces were formulated, which can well describe the relationship between cutting parameters and cutting forces.
Effect of Rare Earth Ce on Casting Properties of Al-4.5Cu Alloy
Authors: Xie Shi Kun , Yi Rong Xi , Gao Zhi , Xia Xiang , Hu Cha Gen , Guo Xiu Yan
Published: October 2010

The effects of adding rare earth Cerium on Al-4.5Cu alloy microstructure, solidification range and volume changes in the solidification process are researched. Experiments show that rare earth Cerium will bring remarkable effects on the alloy microstructure, solidification and solidification shrinkage interval. When the quantity of rare earth Cerium is about 4 wt%, the solid-liquid two phase of Al-4.5Cu alloy will range from 640°C to 600°C. The grains of the alloy are refined, round. The volume shrinkage is only 68.6% of that without adding rare earth Cerium.
Numerical Simulation of Accumulative Forming Bipolar Plates of Fuel Cell
Authors: Xu Zhen Ying , Wang Jing Jing , Ding Sheng , Wen Wu , Wang Yun , Yin Bi Feng
Published: October 2010

The bipolar plate is the key part in the fuel cell. It is difficult to produce the micro flow channel of bipolar plates with high accuracy. In order to solve this problem, we present one new forming techniques, accumulative forming, for the fabrication of micro flow channels. With the utilization of the software ABAQUS, finite element model of the bipolar plate with the 20mm×20mm×0.2mm is developed to simulate the accumulative forming and obtain the forming rules. The simulation results are about the plate’s thickness change and deformation. It shows that the thickness reduction decreases gradually from the center of the channel to the outside with the maximal magnitude in the starting point of accumulative forming. The maximum thinning ratio is 15.85%, which is in the forming limit scope. The simulation demonstrates the feasibility of the accumulative forming and good formability.
The Optimization for Design of the Parameters of Spiral Baffle
Authors: Lin C.C. , Kuo C.C.
Published: October 2010

A methodology for optimization of the development of the spiral baffle based on the scientific molding approach is presented. The function of the spiral baffle, a mold cooling system components is used to convey the coolant to the tip and back in the form of a helix. It makes a very homogeneous temperature distribution of the mold. Some design parameters of the spiral baffle, such as spiral angle, pitch …etc. are important for it to achieve a good performance. In this work, we propose a methodology to optimize the design parameters based on computer aided engineering analysis and the scientific molding approach. The scientific molding is a scientific way to detect in which area a defect lies and determine the optimal molding parameters with experimental data. It provides an alternative besides the traditional optimization methods to determine the injection molding parameters, such as injection velocity, holding pressure, …, etc. In order to illustrates how to implement this methodology to determine the design parameters of the spiral baffle. The experiment is proceeded and to validate the results of the proposed method.
Feature Analysis for Milling Force of Three-Edge End Mills
Authors: Liu Can , Tan Guang Yu , Li G.H. , Liang J.S. , Li D.R.
Published: October 2010

In order to obtain the features of force for three-edge end mills in normally milling, an equation of milling force in Y direction was built based on the presumption that the forces of every edge are not equal, and its simulation waveforms in time domain was analyzed, the force of Y direction was found to present different spectral features under different radial depth of cut or ratio of radial force to tangential force. Milling experiments were done in a three-axis CNC machine, the features of measured force meets the results of simulation analyze. Study results indicates that the force in slot milling contains a rather great sub-component with spindle rotational frequency, while in partial milling the main sub-component is that with tripler of spindle rotational frequency. This conclusion can be used as the reference basis in judging failure of mills.
The Reliability Analysis of a Vacuum Forming Mold for IC Packing Bag
Authors: Lin Wei Shin
Published: October 2010

This article is pointed to the reliability analysis of the vacuum forming mold for plastic carrier tape. The reliability analysis of the vacuum forming mold was decided by the dimension specification of the plastic carrier tape. The reliability design of the vacuum forming mold was preceded according to the reliability requirement. After detail design of the parts which would be manufactured and assembled. The accuracy and performance of the mold had been tested subsequently. The reliability of the mold was conducted by the accuracy of the plastic carrier tape. Through series of inspections and analysis, all the dimension accuracy of the plastic carrier tape met the specification, and vacuum forming mold’s reliability level confirms to design requirement.
A Non-Linear Flow Channel Implementation Method in Magnetic Gap Space of Magneto-Rheological Valve
Authors: Tang Chun Rui , Liu Dan Dan
Published: October 2010

A non-linear flow channel implementation method in magnetic gap space of magneto-rheological valve is proposed in this paper. The involved magneto-rheological valve in the method has a non-line flow channel which is formed by magnetic gap space between oil inlet disc and oil distribution disc, the concentric annular trapezoidal concave of the surface of the oil inlet disc, the concentric annular trapezoidal convex of the surface of the oil distribution disc, the corresponding convex and concave trapezium between the inlet oil disc and the oil distribution disc, the surface of oil distribution disc and oil inlet disc. The method is beneficial, because the maximum magneto-rheological effect is produced by placing the magneto-rheological fluid in the magnetic field whose intensity is maximum and not more than magneto-rheological fluid saturation intensity, and the magneto-rheological fluid channel length is lengthen in the limited space of the magnetic gap, we can further poly-magnetic by using of separated magnetic sheeting under condition of taking full advantage a limited poly-magnetic cross-section of the magnetic field. The method can significantly enhance the magneto-rheological fluid pressure difference under the same magneto-rheological fluid and flow requirements, size requirements, response time requirements and energy requirements.
The Analysis of Key Influence Factors and Application Countermeasures on Quality of FDM Prototype Model
Authors: Hou Qing Quan , Zhao Can
Published: October 2010

This paper presents a study on the machining quality of prototype model, and points out its important influencing factors including shaping room temperature, shrinkage ratio of material and wet condition of support material and so on. The prototype model was processed by FDM 3000 rapid prototyping machine made by Stratasys, Inc. There are some concrete problems including inappropriate placement orientation, oversize of prototype, and high efficiency of multi-parts manufacture in practice. At the same time, practical methods were given.
Calculation Method for the Profile Curves of Cycloidal Pump
Authors: Wu Yang Fang , Xia Chun Lin , Shi Yong Gang
Published: October 2010

The calculation method for profile curves in a kind of cycloidal pump was proposed based on meshing principle. According to the relative motion of the rotors and coordinate transformation method, the profile coordinates of cycloidal gear were obtained. The profile coordinates of cylindrical ring gear were accurately calculated in accordance with the meshing region and the non-meshing region. The example of design and calculation was also given in this paper. According to the results, the profile curve of rotors was drawn.
Effect of Alkaline Treatment of Wood Flour on Strength of Wood-Plastic Composites for Selective Laser Sintering
Authors: Jiang Kai Yi , Guo Y.L. , Zeng W.L. , Xin Z.S. , Liu X.
Published: October 2010

Based on selective laser sintering of rapid prototyping process, the composites were prepared by filling PES with wood flour. For enhancing the affinity of high polar wood flour and non polar PES, and improving the bonding strength, the wood flour was modified via alkalinization. This paper studied the effects of adding compatibilizer and alkaline treatment on the forming accuracy and mechanical property of WPC. The test results show alkaline treatment decreased the hydrophilicity of wood flour, increased the contact area between PES and wood flour and improved the bonding strength. Adding the compatibilizer polypropylene grafting maleic anhydride (PP-g-MAH) can form bonds between the wood flour PES and PP which improves their compatibility and mechanical property more. After performance testing, the relative warping rate is only 0.26%, the tensile strength is 0.014MPa, and shock strength is 0.954KJ/m2.
Application of Regression Analysis of Reliability Research in Off-Center Wearing on Well Tube and Rod of Oil Sucker
Authors: Zhou Ping , Liu Xiu Lian , Yao Jia , Lu Wei
Published: October 2010

Aimed at the deterioration problem of the off-center wearing on well tube and rod of oil sucker on land, regression analysis is adopted in this paper, the quantitative relationship experience formula have been established between the pump inspection period of the off-center wearing on well tube and rod of oil sucker and its affecting factors, so as to effectively reveal the major human controlling failure factors of the off-center wearing on well tube and rod. According to the parameters collection, reasonable arrangements for pump inspection period, providing effective prediction and diagnosis for the off-center wearing on well tube and rod on-site, implementing scientific management, achieving the best operating system for providing practical tools.
Low Temperature Synthesis and Luminescent Properties of Ca2SnO4: Eu3
Authors: Li Yu Zhong , Zhou Xiao Chun
Published: October 2010

A novel red emitting phosphor, Ca2SnO4: Eu3+, was prepared by the low temperature solid state reaction. X-ray powder diffraction (XRD) analysis confirmed the formation of Ca2SnO4: Eu3+. Scanning electron-microscopy (SEM) observation indicated a narrow size distribution of about 500 nm for the particles with spherical shape. Under 396 nm excitation, the Ca2SnO4: Eu3+ phosphor exhibits novel red emission at about 613 nm which is assigned to the 5D0→7F2 electric-dipole transition. Furthermore, the emission transition 5D0→7F2 has been found to be more prominent over the normal orange emission transition 5D0→7F1.
A Modified Wavelet Transform Profilometry
Authors: Liu Chun Yuan , Zhou Bo , Zhao Xiao Min
Published: October 2010

To overcome the noisy background comes from surface reflection, spectrum overlapping and dust noisy. In this paper, a novel modified continuous wavelet transform profilometry is proposed, which employs a fringe image and a flat image to eliminate the background. Both the fringe and flat pattern are projected onto the object by a projector. With the subtraction of the flat image from the fringe image, the background is completely removed and the spectrum overlapping in the frequency domain is prevented. Experimental results showed that the proposed method got a better result than the traditional CWT.
Simulation Study on Deep Hole Drilling Machine Hydraulic System Based on System Schematic Diagram
Authors: Cao He , Wu Wei Hua
Published: October 2010

Aiming at the issues of cumbersome modeling process and complicated programs, the hydraulic system simulation software automation studio is introduced, which is based on system schematic diagram. Taking the hydraulic system of deep hole drilling machine for example, by using automation studio, the motor’s input pressure and flow are simulated and studied, and this system is debugged on bosch rexroth experiment table, the parameter test results are basically the same with their simulation results. This simulation method can accurately simulate the system’s working state, simplify the process of modeling and parameter adjustment, and provide a good way for hydraulic system design and dynamic characteristic study.
Study on the Green Processing of Impeller
Authors: Feng Ming Jun , Sun C.T. , Wang Xue Feng , Sun H.J.
Published: October 2010

According to the characteristics and cutting requirements of the compressor impeller, such as low rigidity, easy to produce deformation and vibration in machining process, the high speed machining technology was adopted to reduce time, the virtual manufacturing technology was used to solve processing problems in computer before the trial machining and improved programming speed and other key supporting technologies were adopted. The study shows that this green processing of impeller had high machining efficiency, good surface roughness and product quality, low production cost and light environmental pollution. It accords with modern green machining development trend.
Development of a Ring Permeability Test System
Authors: Du Yu Hong , Jiang Xiu Ming , Li Xiu Ren
Published: October 2010

To solve the problem of detecting the permeability of the textile machinery, a dedicated test system has been developed based on the pressure difference measuring method. The established system has a number of advantages including simple, fast and accurate. The mathematical model of influencing factors for permeability is derived based on fluid theory, and the relationship of these parameters is achieved. Further investigations are directed towards the inherent characteristics of the control system. Based on the established model and measuring features, an information fusion based clustering control system is proposed to implement the measurement. Using this mechanical structure, a PID control system and a cluster control system have been developed. Simulation and experimental tests are carried out to examine the performance of the established system. It is noted that the clustering method has a high dynamic performance and control accuracy. This cluster fusion control method has been successfully utilized in powder metallurgy collar permeability testing.
The Variable Non-Linear Flow Channel Method and Device
Authors: Liu Dan Dan , Tang Chun Rui
Published: October 2010

In order to overcome shortcomings of traditional hydraulic control valve, the variable non-linear flow channel method and device is proposed, which can make magneto-rheological fluid channel in the magnetic gap space variable non-linear. In the magnetic gap space setting separated magnetic pressure tablets make magneto-rheological fluid non-line fluid along the separated magnetic pressure tablets, so the magneto-rheological fluid channel length is lengthen and it can increase the utilization of a limited magnetic line. Under the condition of magnetic gap size fixedness, improving pressure difference size of controllable fluid of magnetic fluids can achieve goals of energy conservation and reducing the size of magneto-rheological valves.
Research on Bearing Life Prediction Based on Three Parameters Weibull Distribution
Authors: Zhang Feng Shou , Liu T.T. , Liu J.T. , Cui F.K.
Published: October 2010

To those bearings which are used in the field of aerospace, when doing the test of bearing life of the high precision and high reliability, the small sample datas and non-failure phenomenon will occur. To be able to accurately predicting the life and reliability of bearing, the paper analyzes geometry and physics meaning of three parameters of Weibull distribution based on the three parameters Weibull distribution theory. And Builds the Weibull likelihood function. According to Newton iterative method, the left of equations set is expansed to make it transformed into linear equations set. Then iterative calculate the parameters estimate value. So obtain bearing reliability model of three parameters Weibull distribution. Failure statistics shows that the mathematical model of the paper can predict the actual life of bearing.
The Study of Target Points Center Extracting and Matching in Calibration
Authors: Zhou Bo , Wang Dong Ping , Yang Jian
Published: October 2010

It’s important to extract target points center from image in computer vision quickly and accurately. The center extract with the raw gradient information in the neighborhood of the target points boundary to get the parameters of the ellipse, avoids the intermediate stage of precisely extracting individual edge points. Moreover, under the dual space representation, the ellipse parameter can easily be calculated from the dual conic with the qualification of the ellipse, and the ellipse center will be got at the same time. Then, the RANSAC algorithm is used to match the pair of corresponding points between the calibration image and the calibration plate. The experiment and application result shows that the method is efficiently.
The Prediction of Shot Peening’s Surface Roughness with Premixed Water Jet Based on Neural Network
Authors: Wang Rui Hong , Wang Chong , Zhang Xiao Mei
Published: October 2010

Shot peening’s surface roughness is an important factor affecting the effect of shot-peening. The paper selects blasting pressure, scanning speed and target distance as affecting factors in the process parameters, the shot penning test which aims at 2A11 aluminum alloy materials through applying the premixed water jet, according to test data, the paper establishes mathematical model of shot peening’s surface roughness applying neural network, and applies this model to predict shot peening’s surface roughness. The results show that the training average error of this model is small, the predicted effect is good, it can meet the requirements of shot peening’s surface roughness prediction accuracy in the industrial production, it has greater practical value.
Research on Safety Protection Technology of Conventional Lathe CA6140
Authors: Du Wei Gang , Zhong Hua Yang , Guo Yan Yan
Published: October 2010

At present, in the overall quality of university education in our country, the mechanical engineering training is an important part. The actual operation of lathe is a key element in this process, and the first and foremost problem in lathe operating is security. In order to increase the personal safety of students and equipment safety, local technical transformation on CA6140 lathe was carried, including the security guards power chuck, chuck and other anti-collision travel limit. The practical application shows that after transformation, there had none of collision accidents due to unload lathe chuck wrench.
Preparation and Properties of Waterborne Polyurethane with PDMS Side Chain
Authors: Yue Rui Feng , Li Shu Cai
Published: October 2010

A series of waterborne polyurethane with PDMS side chain (SiPU) were synthesized using twice-self-emulsifing method. Effects of AEAPS content on properties of SiPU emulsion and films from SiPU emulsion were discussed. The results showed that SiPU emulsion has good stability when AEAPS content in SiPU was less than 10wt%. The PDMS side chains in SiPU were easily enriched to the air-surface of the SiPU films to lower the surface tension and effectively improve the water resistance of the WPU films. When AEAPS content in SiPU reached to 8wt %, SiPU film had good water resistance but the tensile properties were not changed significantly.
Study on Load-Velocity Dynamic Property of Piston-Type Hydraulic Cylinder Based on SIMULINK
Authors: Jin Xiang Shu , Ding Shi Yan , Tang Xue Zhong , Hu Zhi Xi
Published: October 2010

According to liquid continuity theory and the dynamic equilibrium conditions, established a piston-type hydraulic cylinder mathematical model. Founded the simulation model in the SIMULINK/ MATLAB environment and solved its unit-step response based on the relation between load and velocity, gave the hydraulic cylinder design parameter and the medium character’s influence to its unit-step response, summarized the intrinsic relations between parameters and the time domain index, provided the theory basis to optimize the hydraulic cylinder dynamic property. The hydraulic cylinder load - speed dynamic performance studies have shown that this method does not require complicated programming, simulation models can be visually established, and can greatly shorten the design cycle, reduce design costs, and improve product performance.
Investigation of the Drawing Process of a Square Rod from a Round Bar by Using 3-D Finite Element Analysis
Authors: Yang Tung Sheng , Chang Sheng Yi
Published: October 2010

Wire and rod drawing is widely used in metal forming processes to obtain products such as rods and wires. Rods having shaped sections such as square, rectangle and irregular section are necessary to produce connecting pins and components of transformers. Important characteristics of the shaped drawing process are the corner filling and inhomogenious factor of strain that influence the dimensional accuracy and the good quality of the product. In this paper, a three-dimensional rigid-plastic finite element analysis is used to simulate the drawing process of a square rod from a round bar. A finite element method is also used to investigate the corner filling, forming load, stress distribution and inhomogenious factor of effective strain under various process parameter conditions, including the reduction of area, the die semi-angle, and the friction factor
Finite Element Numerical Simulation of EDM Surface Strengthening in Gas Medium of Stainless Steel 1Cr13
Authors: Wang H.X. , Zhang X. , Zhang W.S.
Published: October 2010

In this paper, the finite element simulation model of the electrode melting drops coating process on the workpiece was established, and the numerical simulation of the the temperature field and thermal stress field of the single-pulse electric spark discharge strengthening region was carried out. The results indicated that, in the initial moment of spark discharge, the heat-affected region was small, but the temperature gradient and the maximum temperature were very big. With time increased, heat-affected region kept growing, while the temperature gradient and the maximum temperature both kept decreasing. The extrusion stress mainly concentrated in the region of the outer edge of the combination area of the coating point and the workpiece, and the region of the coating point surface. The tensile stress mainly concentrated in the region of the combination area of the coating point and the workpiece. As time increased, both maximum stress and stress gradient kept growing. The results showed that the experimental data by X-ray stress test had good agreement with the simulation results.
The Application and Development of Microbubble Column Flotation Technology in China
Authors: Wang Yong Tian
Published: October 2010

Since the early 1980s, great progress has been made in microbubble column flotation technology. As one of the important mineral processing methods, the application and development of this technology in China are summarized in this paper from four respects. Firstly, a patented cyclone- static microbubble separation method was proposed to overcome the notable problems mentioned in the previous flotation columns. Secondly, microbuble column flotation was introduced to separate the high ash as well hard-to-separate coal slime generated from dense medium processes. The characteristics of the microbubble column, and the flotation process for fine coal and the high ash coal separation was analyzed. Thirdly, the application of microbubble column flotation in China was detailed introduced, especially the characteristics of series microbubble column flotation equipment, and efficient column type coal slime separation crafts were discussed. The application of microbubble column flotation particularly in low ash content coal preparation, and discarded coal slime processing technology were presented. Finally, microbubble column flotation has been extended to non-coal mineral processing, such as magnetite concentrate upgrading (concentration iron and removing silicon), sulfide copper mine separation, white tungsten flotation, etc., the related research was briefly introduced in this paper as well.
Effects of Isothermal Process Parameters on the Microstructure of Semisolid Alsi7mg Alloy Produced by EPM
Authors: Tian Wen Tong , Zhang Guang An
Published: October 2010

The effects of isothermal process parameters on the microstructure evolution of semisolid AlSi7Mg alloy produced by electro-pulse modification(EPM) and partial remelting process were investigated using an image analysis software based on quantitative metallography. The results showed that long isothermal time could make the semisolid particles more globular, but the size of the particles would grow larger; high semisolid isothermal temperature would reduce the solid volume fraction and accelerate the spherical evolution of the solid particles. It was found that the optimal process parameters should be 590°C and 10-20min of isothermal temperature and time respectively based on the conditions of this paper. The mechanism of the particles’ formation was also discussed during the isothermal treatment.
Study on Dynamic Fuzzy Classification of Design Proposal Based on Design Style
Authors: Gao Zhu , Ji Xiao Min
Published: October 2010

Based on the common background of product prototype form, Under the support of the shape split library and product design libraries and library, this paper proposes the product customization parameters, and the refinement method of design between designers and clients, builds the shape split libaray based on eigenvalue of Mathematical model of shape prototype, discussed the dynamic fuzzy classification method based on graphic-based design to determine the shape innovative design process. It will give a basis for the development of CAID system combining the parameterization form design with personalization.
Analytical Study on Kinetic Characteristic of the Shell of Air-Powered Diving Pump
Authors: Tang Guo Xing
Published: October 2010

In this paper, the analytical tools and analytical methods for the shell of air-powered diving pump was selected, the analysis of modal and impact resistance was done, the quantitative parameters of natural frequency and the impact resistance capability was gained. The result of the modal analysis indicated that the shell could not happen the resonance, the result of impact resistance analysis indicated that the shell could resist the impact when the impeller dilapidate. The results of analysis have the guide for design; it can be applied in practice.
Study on Variant Design and Improving Technology of Complex Mechanical Products Based on Knowledge Reuse
Authors: Jin W.D. , Guo H.
Published: October 2010

Reuse of design knowledge may play an important role during the variant design and improvement of complex mechanical products. In the paper, a design knowledge reuse model and a knowledge-reuse-based process model with helical evolution were proposed. Effective management and timely updating technology of design knowledge was also analyzed and explored, and a knowledge-reuse-based computer design system was developed. Moreover, taking a slipform paver as an example, variant design and improving steps of complex mechanical products was intrduced.
Study of Modeling and Distortion Predicting for Multi-Frame Components
Authors: Chen Jie
Published: October 2010

In this study, a method called “house-building frame modeling” based on the APDL language is introduced firstly, and the finite element model of the milling distortion analysis is established for a platform structure with 192 frames by the method, and the prediction analysis of the milling distortion under different milling conditions is carried out, by means of 3-D finite element simulation technology. Comparing the simulation results and the measurement ones of the milling distortion, the proposed model is modified; the modeling method and prediction method are proved to be effective.
The Development of Fault Diagnosis System of Reciprocating Compressor Based on LabVIEW
Authors: Pei Jun Feng , Qi Shu Xia , He Wei Ying
Published: October 2010

The technology of equipment condition monitoring and diagnosis plays an important role in maintenance of equipment running normally. The project, using advanced technique , etc, realize functions of on-line monitoring and data analysis for it can not only acquire signals on different measuring positions in equipment continuously, but also look over current trend and make primary fault diagnosis. This paper presents a data acquisition and fault diagnosis system of reciprocating compressor using LabVIEW as the software development platform and shows fault recognition by perception neural network. It is proven by experience that the virtual signal analyzer has achieved relatively satisfactory results.
Study on Formability about ME20M Magnesium Alloy Sheet
Authors: Zhang Ting Fang , Xie Shi Kun
Published: October 2010

Warm forming of magnesium alloy sheet has attracted more and more attention in recent years. Mechanics tension test has been made in this paper in order to study the constitutive relationship of ME20M magnesium alloy sheet at different temperatures and strain rates. And a constitutive relationship which includes a softening factor has been put forward. Warm deep drawing experiment and numerical simulation on ME20M magnesium alloy sheet have been made in which the attention was focused on the forming temperature. The results showed that the limit deep drawing height of ME20M magnesium alloy sheet can be dramatically improved as the temperature goes up, especially when the temperature was over about 250°C. Simultaneity, it is feasible and effective to add a material model into numerical simulation software by user subroutine.
The Dynamic Finite Element Analysis of Table of VM1000 CNC Machining Center
Authors: Yin Fei Hong
Published: October 2010

The table of VM1000 CNC machining center is a box-frame structure with ribbed plate. The three-dimensional model of table based on Pro/E was built, the modal analysis and related experiments of table was completed by software of ANSYS, The dynamic performance parameter of the table is obtained, and the analysis results indicate that the design of table is available; it can be applied in practice.
Integration Technology and Application Research on Management Information in Textile Industry
Authors: Chen Zhi Wei , Chen Zhi Feng , Xu Yan
Published: October 2010

Firstly, we discussed the necessary of the integrations on management information in textile industry. We aimed at realizing e-card on employee management, e-bill on account, and e-warehouse on material. These are all based on network. The technology framework of the integration, including middleware of different databases and platform of real time data monitor on production is mainly talked in this article. This solution concerned almost everything in the company, such as material production, spinning and weaving, designs on grand, cooperation production, and sales.
Flexible Wedge-Effect for Insect Flying and Fishtail-Effect for Fish Swimming
Authors: Jin Xiao Yi , Lu Ning , Zhang Bing , Yan Jing Ping
Published: October 2010

In this paper, we regard insects wing as a flexible wing and use the flexible wedge-effect to explain the reason for the creation of high lift when insects flying. We disclose the fact that the flexible wedge-effect for insects flying and the fishtail effect for fish swimming have the same core—the force needed for creature movement comes from the flexibility and rhythmic locomotion. The most important bionic meaning of this kind of explanation is that it will be the developmental trend for the driving mode of the future bionics flapping aircraft that the wing is exerted some simple rhythmic locomotion in the state of the self-adaptability distortion. The easier the bionic motion simulation is, the more stable it can be realized. The bionics flapping aircraft research team of the Southeastern University has designed and made a prototype of the bionics flapping aircraft with flexible wing and successfully finished several outdoor test-flies.
Study on Cumulate Function of Cut-In Impacting Disrepair with Waved-Edge Milling Insert
Authors: Wang Zhi Gang , Wei Huali Gang , Li Zhen Jia , Cai Dong Song
Published: October 2010

According to the serious problem in milling cutting , experiment of cut-in impact disrepair has been done. Based on the method of experiment data and mathematical analysis, cumulate function of cut-in impact disrepair was founded with Weibull software and Matlab software. The cut-in style with minimum disrepair was optimized. The results showed that the U style has the longest cutting length, the most impact-resistant times, and the best ability of impact-resistant disrepair. The sequence of impact-resistant disrepair was U style, V style, T style, and S style. The theoretical basis was provided for the application of 3D complex groove milling insert in reason.
Preparation of V-Doped Titanium-Bearing Blast Furnace Slag and its Antibacterial Activity to Mildew
Authors: Wang Hui , Yang He , Xue Xiang Xin
Published: October 2010

Photocatalyst of perovskite type V-doped titanium-bearing blast furnace slag (VTBBFS) were prepared by high temperature solid-state method with different concentration of V for 2 hours at 800°C. The structure and composition of VTBBFS photocatalyst was characterized by XRD, UV-vis absorption spectra, and SEM images. It shows that VTBBFS photocatalyst has perovskite structure, and a kind of irregular and massive particles by calcined at 800°C. Its photo absorption performance was checked by UV-Vis spectrophotometer, its absorption spectrum has a obvious red shift. Use Aspergillus Niger to research the antibacterial activities of VTBBFS photocatalyst. The results show the antibacterial activities of VTBBFS photocatalyst has a good antibacterial performance with 5% diluent of VTBBFS15 under the UV light.
Study on Temperature Field of Different Substrate Shape in Preparing Diamond Film
Authors: Li Duo Sheng , Zuo Dun Wen , Zhou X.L. , Hua Xiao Zhen
Published: October 2010

Shell diamond film was prepared by DC plasma CVD, and substrate shape had an important influence on the growth of shell diamond film. Simulations of the substrate temperature field have been done respectively when the substrates are convex and concave. The simulation results show that, DC plasma flow more easily on convex substrate than concave substrate, and temperature field of convex substrate is more uniform than concave substrate; uniform temperature field was help to prepare high quality shell diamond film. In this study, shell diamond films were prepared on convex and concave substrate, respectively in experience. The results indicate that the growth of diamond film on convex substrate was better than on concave substrate, and Raman spectrum shows, on the convex substrate, high quality shell diamond film was prepared successfully, and it accords with the simulation results.