bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Frequency on Fretting Fatigue Damage Behavior of Al-Zn-Mg Alloy
Authors: Liu Dan , Jiang Xiao Song , Sun Pei Qiu , Shen Yue
Published: September 2013

nfluence of frequency on fretting fatigue damage behavior of Al-Zn-Mg alloy was studied in this paper. Fretting fatigue lives and damage characteristics of Al-Zn-Mg alloy were researched under different frequencies. Macroscopic tests and microscopic analysis were used to study on influence of frequency on fretting fatigue damage behavior of Al-Zn-Mg alloy. Fatigue lives would be greatly reduced by fretting under the experimental conditions in this paper. With frequency increasing, fretting fatigue lives were firstly decreased and then increased (f=9Hz). Fretting scar, which was the important reason for fretting fatigue crack initiation, was caused by embedding debris; eventually, crack initiated at the edge of the fretting scar. Fretting fatigue fracture is a whole process of crack initiation, propagation and final fracture. And final fracture increased with frequency reducing, which was generally occurred near the center of the fracture.
Chemical Bath Deposition of ZnS Buffer Layers
Authors: Quan Tai
Published: September 2013

Chemical bath deposited ZnS thin films are promising buffer layers for thin film solar cells, replacing the environmentally hostile CdS buffer layers currently in use. Reflection, absorption and scattering are the three main light loss mechanisms in buffer layers. In this work, improved process conditions, such as magnetic stirring and air annealing, are used in the chemical bath deposition of ZnS thin films to optimize their surface morphology, which effectively reduces light scattering and increases the transmittance, resulting much better ZnS thin films.
Recovery of Copper from Waste Printed Circuit Boards by Suspension Electrolysis
Authors: Zhang Long , Qiu Li Xin , Xi Xiao Li , Ma Li Wen , Zhang Li Wen , Wang Zhi Hong , Zhou Ji Feng
Published: September 2013

Copper was recovered from waste printed circuit board using suspension electrolysis technique in this paper. The relationships between the current efficiency, copper products purity, copper products morphology and the electrolytic conditions have been studied. When copper ion concentration was 50 g/L, sulfuric acid concentration was 90 g/L and the current density was 1.0 A/dm2, current efficiency of electrolysis is improved effectively. With setting the stirring device outside the anode basket, high purity of copper is obtained when the concentration of chloride ion is 30 mg/L, concentration of copper is 40g/L and the current density is 1.0 A/dm2. Smooth and compact copper is obtained when the concentration of gelatin and thiourea are 5 mg/L and 3 mg/L, respectively.
Vibration-Assisted Electrochemical Polishing for Extremely Smooth Surface Generation
Authors: Kim Uk Su , Park Jeong Woo
Published: September 2013

This study demonstrates a novel hybrid surface polishing process combining non-traditional electrochemical polishing (ECP) with external artificial ultrasonic vibration. ECP, typical non-contact surface polishing process, has been used to improve surface quality without leaving any mechanical scratch marks formed by previous mechanical processes, which can polish work material by electrochemical dissolution between two electrodes surfaces. In recent paper, ECP using ultrasonic vibration have demonstrated surface improvement. This study verifies improved results than conventional ECP for additional experiments to vibration electrochemical polishing (VECP) using ultrasonic vibration. The localized roughness of work material is measured by atomic force microscopy (AFM) and scanning electron microscopy (SEM) for detailed information on surface. Besides roughness, overall surface quality, material removal rate (MRR), and productivity etc. are compared with conventional ECP.
Decomposition of Ilmenite by Ammonium Hydroxide
Authors: Tang Hai Bo , Liu Yu Min
Published: September 2013

A new process was provided for decomposition of ilmenite by ammonium hydroxide under hydrothermal process. The significant effects of reaction temperature, NH4OH concentration, NH4OH-to-ilmenite mass ratios on titanium extraction were studied. The temperature showed significant influence on titanium extraction. The experimental data of the extraction rates under the relevant operating variables were well interpreted with the shrinking core model under chemically controlled process.
Metal Impurities Removal from Metallurgical Grade Silicon by Hydrochloric Acid Leaching
Authors: Li Xiao Ming , Dang Yan Mei , Li Wen Feng , Zhao Jun Xue , Cui Ya Ru
Published: September 2013

As a pre-treatment process for producing solar-grade silicon, hydrometallurgical method could remove the most of metallic impurities of metallurgical-grade silicon, which is a hopeful technology to provide solar energy material independence of the Siemens skill. Factors such as the hydrochloric mass fraction, temperature, reaction time, and particle size of silicon powders were investigated in the impurities removal experiments under the condition of mechanical stirring. The leached samples were analyzed by ICP and SEM. The optimum parameters, hydrochloric mass fraction 5%, temperature 80°C, reaction time 9h, particle size 75μm, were determined by single factor experiments and orthogonal experiments. The 86.1% of Fe, 68.1% of Al, 85.9% of Ca and 25.9% of B impurity was removed from metallurgical-grade silicon powder.
Effect of Solution Annealing and Low Temperature Ageing on the Microstructures and Superelastic Behaviour of Ti-50.7at.%Ni Alloy
Authors: Hamzah Esah , Hastuti Kurnia , Hashim Jasmi , Chuah Chuan Eng , Khattak Muhammad Adil
Published: September 2013

In this study a plate form of Ti-50.7at.%Ni was subjected to solution annealing at 800°C and 900°C for one hour followed by ageing at 300°C and 400°C for 4 hours respectively in order to investigate the effect of solution annealing and low temperature ageing on the microstructures and superelastic behaviour. It was found that the formation of Ti3Ni4 precipitates on the samples aged at 300°C and 400°C influences superelasticity differently. Increasing the testing temperature up to 38°C generally increases the superelasticity of samples for all heat treatment conditions compared to those tested at 22°C, however the sample solution annealed at 900°C give better superelasticity at 22°C due to excessive plastic deformation at higher temperature.
Mechanical Reliability of Oxidized Zr-1.1Nb-0.5Cu Alloy Nuclear Cladding Tube in Compression
Authors: Jeong Gu Beom , Hong Sun Ig
Published: September 2013

Ring compression tests on the oxidized Zr-1.1Nb-0.05Cu cladding tubes were performed to examine the mechanical reliability of Zr-Nb-Cu cladding tubes. In compression of the non-oxidized cladding tubes, large load drop associated with the cladding failure appeared at the total displacement of 6.3 mm. After oxidation at 600°C for 24 hrs and 700°C for 3 hrs, small drop of load resulting from small cracks in the thin oxide film was observed at the total displacement of 1.0 mm. After oxidation at 700°C for 24hrs, load was extremely low, but catastrophic fracture occurred at the total displacement of 6.2~6.5 mm. The oxide of Zr-1.1Nb-0.05Cu cladding tubes formed at high temperature apparently causes the premature failure of tubes.
Effect of Calcium Fluoride and Magnesia on the Performance of Tundish Coverture Fluxes Made of Blast Furnace Slag
Authors: Zhang Zhao Hui , Liu Bai Long , Ren Yun
Published: September 2013

Preparation of the tundish coverture fluxes by the blast furnace slag can recycle utilization of solid wastes discharged from iron and steel industry. Calcium fluoride and magnesia can play an important role for the basic performance of tundish coverture fluxes. The impact on the melting temperature, viscosities and surface tension of the tundish coverture fluxes from the content of calcium fluoride and magnesia were studied. The results showed that: When the content of CaF2 increased from 10% to 25%, the melting temperature, the viscosity and the surface tension were decreased by 50°C, 0.3 Pa·S and 0.039 N/m respectively. The viscosity was brought down of 0.02 Pa·S, the surface tension was increased by 0.03 N/m, and the difference between the lowest and highest melting temperature was about 3°C when the content of MgO changed from 5% to 11%.
State Analysis and Integrity of Welded Structures of the Upper Ring of the Turbine Runner Guide Vane Apparatus of Hydroelectric Generating Set A6 on Hydro Power Plant Djerdap 1
Authors: Arsić Miodrag , Odanović Zoran , Bošnjak Srđan M. , Mladenović Mladen , Savić Zoran
Published: September 2013

During the refurbishment of the hydroelectric generating set A6 on HPP Djerdap 1, for the state analysis and assessment of the level and causes of degradation of the structure of the vertical Kaplan turbine runner guide vane apparatus non-destructive tests and inspections, as well as destructive tests of base material and welded joints, have been carried out after 40 years of service. Results of non-destructive tests performed on welded joints are presented in this paper (magnetic particle and ultrasonic inspection), as well as results of destructive tests of the base material and welded joints (testing of tensile properties, impact testing, metallographic analyses of the structure). A large number of crack type line indications were detected by magnetic particle inspections, while the occurrence of partial penetration in roots of welded joints was detected by ultrasonic inspections, as well as lamellar tearing of the base material. Tensile properties of tested samples taken in longitudinal and transverse direction fulfilled the requirements of the standard with certain deviations, which does not stand for samples taken in z-direction with significantly lower values of contraction of the cross-section than minimum prescribed values, which proves that base material is not resistant to the occurrence of lamellar cracks. Metallographic tests performed on specimens taken from the base material in longitudinal and transverse direction showed that the microstructure is stripe-shaped and ferrite-pearlite with non-metallic inclusions of oxide, sulphide, silicate and aluminate type, while metallographic tests performed on specimens taken from welded joints showed that their microstructure is stripe-shaped and ferrite-pearlite with non-metallic inclusions of oxide type. A large number of micro-and macro-cracks were detected in the microstructure as well. Experimental tests enabled the determination of the causes of occurrence of lamellar tearing in base material and crack type defects in welded joints, while analytical calculation that refers to the stress state enabled integrity of welded structure of the upper ring of the turbine runner guide vane apparatus.
Technology on Ni-ZrO2-CeO2 Nanocomposites by Pulse Electroforming in an Ultrasonic Field
Authors: Xu Yang Yang , Xue Yu Jun , Li Ji Shun , Liu Yi , Yang Fang
Published: September 2013

Ni-ZrO2-CeO2 nanocomposites were prepared by double-pulse current in an ultrasonic field. The effect of average current density, duty ratio and frequency of double-pulse current on nanoparticles content of Ni-ZrO2-CeO2 nanocomposites was studied. Meanwhile, surface morphology and microhardness of nanocomposites were analyzed. The results show that, with the positive average current density, positive duty ratio and positive frequency increased, the nanoparticles contents increased at first and then decreased. On the contrary, it reduced while reverse average current density, reverse duty ratio and reverse frequency were increasing. Compared with Ni-ZrO2-CeO2 prepared by direct current and monopulse current, grain of Ni-ZrO2-CeO2 nanocomposite prepared by double-pulse current is finer, the microhardness is also higher.
Preparation and Experimental Study of the Complex Shape Carbide Diamond Coated Tools
Authors: Zheng You Yi , Zhang Chun Lin , Xu Xing Xin
Published: September 2013

The CVD diamond films have a series of excellent performances, so it has a wide range of applications in the cutting tools, wearable devices, electrochemical electrodes and other fields, and it has a very substantial market prospects. In this study, The diamond films with a layer of uniform and smooth were deposited on the surface of the complex surface YG6 carbide end mill by using the hot filament CVD method, the quality of diamond films was detected by using the scanning electron microscopy and the laser Raman spectrometer. The cutting performances of diamond coated end mill were evaluated from the workpiece surface quality and tool life two aspects by cutting silicon carbide aluminum reinforced composites, and compared with the uncoated carbide tools. The experimental results show that because of the cutting tool was pretreated that make tool surface coarsening, leading the surface quality was machined by diamond coated tools is lower than the carbide cutting tools. However, the coating can protect the tools, increase the wear resistance of the coated tools and make the life of the diamond coated tools increase 3-5 times than the carbide cutting tools.
Effect of Cutting Fluid on Machinability of Optical Glass SF6
Authors: Jia Peng
Published: September 2013

For the technology of diamond cutting of optical glass, the machinability of glass is poor, which hindering the practical application of this technology. In order to investigate and ameliorate the machinability of glass, and achieve optical parts with the satisfied surface quality and dimensional accuracy, this paper first conducted SF6 indentation experiment by Vickers microhardness instrument, and then the scratching tests with increasing depths of cut were conducted on glass SF6 to evaluate the influence of the cutting fluid properties on the machinability of glass. Based on this, turning tests were carried out, and the surface quality of SF6 was assessed based on the detections of the machined surfaces roughness. Experimental results indicated that compared with the process of dry cutting, the machinability of glass SF6 can be improved by using the cutting fluid.
Grinding Experiments on PTMCs with Vitrified CBN Wheel
Authors: Miao Qing , Ding Wen Feng , Zhao Biao , Xu Jiu Hua , Liu Zhi Wu , He Jian
Published: September 2013

Grinding experiments were conducted using vitrified CBN wheel on particulate reinforced titanium-based matrix composites (PTMCs) and Ti-6Al-4V matrix. The issues discussed are grinding forces, surface roughness, and the formation of surface integrity. The main results are summarized as follows: (1) The grinding forces increase with the increasing workpiece speed and depth of cut during grinding PTMCs and Ti-6Al-4V materials. (2) Decreasing depth of cut properly contribute to obtaining finished surface with good surface during grinding of PTMCs using CBN wheel, but the workpiece speed has little influence on the surface roughness value of PTMCs. (3) The formation of surface integrity of PTMCs is due to the combined removal of the TiC and TiB reinforcements and the Ti-6Al-4V matrix.
Ultra-Precision Fly Cutting Experimental Study of Semiconductor Laser Heat Sink
Authors: Chen Yu Long , Liu Hai Tao , Sun Ya Zhou , Zhang Qiang , Liang Ying Chun
Published: September 2013

Laser cooling is one of the critical problems in the research of high power semiconductor lasers. This paper provides an overview of microchannel heat sink which is used to cool the high power semiconductor lasers. The method of polishing after cutting is the current processing method of the heat sink, which is because the ordinary cutting method cannot meet the requirements of high quality of surface and edge burrs. This paper proposes ultra-precision fly cutting method for heat sink machining to omit the polishing processing to improve the machining efficiency, and verifies by experiments that the feasibility of the processing method and the edge quality improved by workpiece superposition processing method.
Research on Heat Compensation Control of Giant Magnetostrictive Material in the Micro Feed
Authors: Chen Bai Ning , Chen Feng , Li Xu
Published: September 2013

This paper present a Giant Magnetostrictive Actuators (GMA) which used magnetostrictive characteristics of Giant Magnetostrictive Material (GMM) and is applied on Micro displacement of precision instrument. Since GMM is influenced by temperature and the electrified coils generating magnetic field are the main sources of heat in GMA, so the temperature impacts factors on the output displacement of magnetostrictive material are analyzed firstly, and also a control method based on existing magnetostrictive actuators is redesigned, while model is established according to the relation between output displacement and voltage values. Finally a solution is proposed about heat compensation control in GMA, and also adds a water cooling system to the cavity of GMA and controls the temperature of cooling water by Single Chip Microcomputer (SCM) according to the detected temperature of magnetostrictiverod; therefore compensations for the GMAs feed displacement are allocated. Displacement closed-looped PID controls are used to tests, which can proves that the heat compensation control system of GMA can lower the impact of increasing temperature on GMMs magnetostriction coefficient and increase positioning accuracy.
Finite Element Simulation on High Speed Cutting of Hardened 45 Steel Based on ABAQUS
Authors: Li Guo He , Qi Hou Jun , Yan Bing
Published: September 2013

For the high speed cutting process of hardened 45 steel (45HRC), a finite element simulation of cutting deformation, cutting force and cutting temperature is finished with the large general finite element software ABAQUS. Through the building of geometry model, material model and heat conduction model, also the determination of boundary conditions, separation rule and friction condition, a thermal mechanical coupling finite element model of high speed cutting for hardened 45 steel is built. The serrated chip, cutting force and cutting temperature can be predicted. The comparison of experiment and simulation shows the validity of the model. The influence of cutting parameters on cutting process is investigated by the simulation under different cutting depthes and rake angles. The results show that as the increase of rake angle, the segment degree, cutting force and cutting temperature decrease. But the segment degree, also the cutting force and cutting temperature increase with the increase of cutting depth. This study is useful for the selection of cutting parameters of hardened steel.
Assisted-Grinding in the Laminated Template Electroforming
Authors: Fan Hui
Published: September 2013

Deposit uniformity control is the key in laminated template electroforming and has direct influence on the parts shaping quality and processing cost. Accordingly, this research proposes a Assisted-Grinding pulse electro-deposition technology and designs the device and technology based on the principal. According to experimental method, a number of hard particles (ceramic beads) fill between the electrodes and are propelled by mandrels rotating movement to allow continuous impinging and grinding to the cathode surface, as an effort to instantaneously eliminate boundary effect that is caused by uneven current distribution. In comparison of the finish surface morphology and deposit thickness among the samples obtained respectively by traditional and new ways, the experimental results show that assistant friction could effectively remove the excess sediment and tumor along surface and provide a relatively flat layer with Ra 0.253μm. It shows particles-assisted-grinding has satisfactory practical values and is a novel exploration resolving the technical obstacle in electrodepositing.
Molecular Dynamics Simulation Study on Diamond Tool Wear in Cutting Aluminum-Based Workpieces
Authors: Dong Guo Jun , Zhang Yuan Jing , Zhou Ming
Published: September 2013

The problem of diamond tool wear is the bottleneck for machining large metal reflector with ultraprecision cutting method. In this paper, the author performed simulation study on diamond tool wear in machining large metal reflectors, and established a molecular dynamics simulation model for dynamic simulation of tool wear; and found that in the simulation process the change in cutting speed and cutting depth had definite effect on the tool wear, and the main factors affecting the tool wear was the cutting distance.
Study on Floating Characteristics of an Innovative Liquid Bearing Utilizing Traveling Waves
Authors: Li Ying Jie , Zhou Ming , Shamoto Eiji
Published: September 2013

Hydrostatic bearing is wildly utilized in many precision applications and positioning stages due to their ability to support designed load at zero relative speed between bearing and guide surfaces. However, in practice external pressurized source is necessary for realizing the hydrostatic bearing, which sometimes leads to difficulty in some medical and aero applications within tightly sealed container. In order to tackle this problem, an innovative principle bearing, which utilizes traveling waves, has been proposed by authors in previous researches. The proposed principle is ought to eliminate drawbacks of conventional hydrostatic bearing such as external pressure source, use of compressor, external pump and tubing system, while still achieving comparable static and dynamic capabilities. Based on the proposed principle, a prototype device of liquid bearing utilizing traveling waves was developed and analyzed by experiments in this present paper. Its floating and smooth motion is confirmed by experiments here.
Research on Technologies of Augmented Reality for CNC Machining Process Simulation
Authors: Ma Zhi Yan , Yang Guang You , Su Xu Wu
Published: September 2013

Based on Virtual Numerical Control machining system (VNC), a new method of Augmented Numerical Control machining system (ANC) which aims at the realization of NC machining process simulation in real machining environment is put forward. The System inputs continuous video images of real NC processing environment through camera to identify and locate the major machining and positioning parts of real machine in the image stream. And the virtual parts of VNC will be matched to the corresponding real ones of real machining system to achieve the registration of ANC. The NC system drives the virtual machining models for processing through a real machine. On the other hand, the actual running information of CNC machine are imported into the ANC system to drive some models of process variables such as cutting force, material removal rate, chip shape, tool temperature, cutting tool wear. ANC provides the platform to integrate the geometry and physical simulation based on actual information from real CNC machining environment.
Design and Implementation of the Circular Saw CNC Machining of the Stone Bridge Cutting Machine
Authors: Wu Xian Fu , Liu Jian Qun , Xu Dong Wei , Gao Wei Qiang
Published: September 2013

The stone bridge cutting machine is a multi-function processing machine which can saw, mill and grind. The circular saw machining is the most common processing way. This paper introduced the angle calculation method of the circular saw CNC(Computer Numerical Control) machining lines and arcs, focused on the tangential following algorithm of the circular saw, which was that the tool moved along the tangential direction of the circle or arc with the interpolated motion. Meanwhile, combining with the mechanical property of the stone bridge cutting machine, that is, the rotation angle of the C-axis was less than 360 degrees, two kinds of segmentation machining algorithms were put forward. Based on PC & motion control card, using VC++ software, the stone bridge cutting machine CNC system software was developed. By running stone bridge cutting machine CNC system and testing in the factory, the results show that the circular saw machining is stable, and can meet the requirements of the circular saw CNC cutting processing.
Study on Device of Electric Heating Drill to Small Hole for Hard-to-Cut Material
Authors: Xu Lan Ying , Wu Qiang , Mao Yong
Published: September 2013

Electric heating cutting technology is that material is heated by the thermal effect of the current so that the cutting zone material is softened, meanwhile this reduces the shear resistance of the material, thereby the cutting process gets smooth. In order to make the electric heating technology apply to the small hole drilling successfully, this paper designs a set of compact and simple electric heating drilling device to small hole, this device adopts the electrode structure to avoid spark, and by the device we drill small hole to hard-to-cut materials stainless steel under various parameter conditions, test process and results show that the electric heating drilling device is effective and practical.
Parametric Design of the Coupling of Oilfield Turbodrill
Authors: Zhou Si Zhu , Zhang Si
Published: September 2013

Through discussing the working characteristics of turbodrill and structural particularity of the coupling, the feasibility of couplings series design by parameterized design method has been presented. Through taking advantage of Proe, selecting a turbodrill with diameter of 195mm as the original model, the series design and parameterized design of coupling have been achieved. This paper puts forward four design skills through analyzing the parameterized design of the coupling. The method has been developed and used in the series design of oilfield turbodrill in Yangtze university of China.
Application Analysis of Virtual Simulation Technology in NC Machining
Authors: Hu Xiu Yang , Li Yong Xiang , Wang Hong , Huang Kai Long
Published: September 2013

With the help of the computer simulation technology, the virtual machining simulation system of NC machine tool was built based on the integrated simulation module of the UG NX software. Through setting the NC machine parameter of the virtual machining system, the machining process simulation of the typical parts in virtual environment was completed, which implements the collision and interference checking in the process of NC machining and verifies the correctness of NC programs. Finally, the simulation results prove that the assembly modeling method of virtual simulation system for the NC machining is feasible, and the simulation of machining process can effectively determine the mutual interference problem of the machining system, which lays the foundation for effectively preventing the collision accident.
On Adaptable Design and Application of Mechanical Interface
Authors: Xu Hong Hui , Zhang Zi Qiang , Li Run Dian , Deng Zhi Feng
Published: September 2013

Aiming at the importance of interface in adaptable design of mechanical products, in this paper, research actuality and development of the Mechanical interface are talked over; and the basic requirements and design criteria of adaptable interface design are discussed; lastly, what capability an adaptive mechanical interface must possess is illustrated combing with a specific case, and the adaptable interface in the case can also be applied to similar structure design of other products.
Study on the Gear Parametric Modeling and Database Building Based on UG/OPEN Grip
Authors: Gu Li Zhi , She Wen Zhi
Published: September 2013

Proposed a rapid and accurate parametric modeling method for involute gear design based on UG/Open Grip with the capacity/function-extending database. The dimensional constraints were adopted for the portability and universality. Through the human-computer interaction interface of the modules, the user may need only to change the corresponding parameters to obtain the desired cylindrical gear model. CAD data were collected and accessed in the process to form an independent database. Realization of a gear design was done with the relatively independent database, so that different applications can exchange data with the database, being conducive to data maintenance and expansion. Example was given to verify the correctness and the effectiveness of the modeling method with the database.
The Application of a Grating Tiling Device with Parallel Mechanism in an Inertial Confinement Fusion (ICF) System
Authors: Shao Zhong Xi , Zhou Wei Jiang , Fu Hong Ya
Published: September 2013

The size of pulse compression gratings (PCG) is very big in the ICF system, so we obtained a large size grating by mechanically stitching small caliber gratings. And we design the splicing mechanism to be a 5-DOF Parallel Mechanism with macro/micro dual feed drive control to meet the requirements of large travel, high precision, high stability and 5-DOF of the grating tiling. The macro-moving part is designed to be the 5PTS-1PPS parallel mechanism, using the Feed Mechanism of ballscrew with Stepper Motor Drive.The micro-moving part is designed to be 5TSP-1PPS parallel mechanism, using the feed mechanism of Flexure Hinge with Piezoelectric Ceramic Actuator. We derived control algorithm of parallel mechanism by the method of the Kinematics of parallel mechanism. We analyzed the systematic error and put forward the error correction method in order to improve the positioning accuracy. At last, we designed an optical detecting system to evaluate the feasibility of this scheme, the positioning accuracy and the Stability of parallel Splicing structure. The results showed that the mechanism performance can meet the requirements of grating tiling work.
Integrated Product Data Link for Discrete Manufacturing
Authors: Wu Dai , Yin Guo Fu
Published: September 2013

This paper analyzed the traditional product data structure and the lack in the product data link based on the drawings specified for the product data link of discrete manufacturing in the information integration applications, also made research on the main objective, the material in the product design and manufacturing management of discrete manufacturing enterprise, proposed the product data structure based on the material and manufacturing-oriented. Taking the material as the carrier of product data link, the paper completely and digitally defined the material during the engineering design and process design, which had the material relativity and fully of the manufacturing sequential relationship. So that PDM system was responsible for the providing and managing of the data structure of digital materials, and ERP system was responsible for managing the data structure and business data of the real materials, this would realize the non-gap product data link of discrete manufacturing enterprise in the information integration applications, erase the product data broken link between the PDM and ERP system.
Design for Mechanical Structure of New Nano Electric Boiler
Authors: Wang Rui Kun , Cao Jian Bo , Luo Han Pin , E Shi Ju , Zhao Tian Feng , Tang Xin Xin
Published: September 2013

The traditional electric boiler does not possess heater resistance with high purity and its power factor is always less than one. In order to solve these problems, a novel semiconductor nanoelectric film was studied and used to the electric boiler. Through analysing the principle of existed electric boilers and the advantages of nanotechnology heating materials, a new electric boiler was designed based on nanoelectric film as the heating element. The three-dimensional modeling was finished for the mechanical structure of new nanoelectric boiler. The new nanoelectric boiler has excellent physical stability, high electric conversion efficiency, high power factor, high power density, and long life for using. It could have a very good market prospects in the near future.
RE of Crucial Parts of Brake Caliper Unit Based on the Integration of Multi-Measurement
Authors: Song Rui Qi , Wang Guang Lin , Song Rui Qi
Published: September 2013

Brake caliper unit with intricate structure is the last guarantee device for trains braking, while technology in this aspect is still backward. RE of advanced equipments is an effective and fast way to improve the existing situation. But efficiency and accuracy would be lost if the reversing program is planned in unappreciated way. In view of this, a whole RE scheme for the certain unit was presented in this paper. Multi-measurement was adopted that integration of conventional measurement and 3-D digital measurement was proposed. Based on analyses of structure and function of the crucial parts, feature decoupling was given obeying the principle of data segmentation. From which basic feature groups were extracted as bases of further measure method choosing. Functions of mechanism and demands of precise assembly were all taken into consideration to ensure the high accuracy and efficiency. With help of the optimal matching between structure feature and certain measurement, geometric information digitization was realized and the existing status of excessive point cloud data caused by single measurement was improved. As to part model reconstruction, characteristic curves were fitted in Imageware environment. Taking point clouds as reference, CAD models of parts were built in Pro/E environment. A general process of reverse engineering of complex structural components was stated.
Simulation and Optimization of Mining Dump Truck Steering Mechanism
Authors: Wu Yong Qi , Wang Zhi Jie , Hu Xi Zhi
Published: September 2013

nappropriate design of steering mechanism will reduce the life of tires, increase steering difficulty and the risk of skidding. In this paper, the simulation and optimization of the steering mechanism of a 220t mining dump truck is analyzed. Firstly the motion of the steering mechanism is analyzed with kinematics and dynamics simulation with ADAMS. Objective functions for the steering mechanism are established and optimized with MATLAB. Then the stress and strain of the tie rod is analyzed to check if it meets the requirements. Moreover, the knuckle arm is optimized based on the theory of topology optimization.
The Applications of AEI System for Cultivation of Professional Farmer in Agricultural Modernization Process
Authors: Li Hui Jing , Tong Guang Ji
Published: September 2013

In the process of agricultural modernization, agriculture will realize its socialized production, and its specialization, collaboration and new technologies in the agriculture industry will give birth to a new group of professional farmers, young farmers will be the main part of those professional farmers. At present, the phenomenon that agricultural labors are successors is becoming more serious, the scientific and cultural quality of farmers is low, and theirs market-oriented awareness is not strong enough, they are lacking of a sense of dignity. Those distress human capitals make it urgent to strengthen the cultivation of young professional farmers ,to form a social environment which is conducive for cultivating young professional farmers ,to build a young professional farmers cultivation and to create the conditions for the conditions for the cultivation of young professional farmers.
Finite Element Analysis on Real Contact Area Based on Fractal Characterization
Authors: Wang Jia Chun , Xing Bo Qiang , Zhao Teng
Published: September 2013

No surface in engineering is absolutely smooth. It is important to analyze and calculate the real contact area for a better understanding of friction, wear, lubrication and thermal conductance. To obtain the accurate real contact area between rough surface and smooth surface, a rough-non-rigid-smooth surface contact finite element model is proposed in which the rough surface is characterized by fracture theory. In finite element modeling and analyzing process, MATLABEXCEL and AutoCAD are used to process data, and the smooth surface is considered to be non-rigid body. Compared with the traditional modeling, this method can obtain data quickly and is closer to the actual situation.
Analysis on the Influence of the Strength and Stiffness under the Contact Conditions for Friction Plate
Authors: Zhao Xue Zeng , Wang Xi Gui , Wang Yong Mei
Published: September 2013

This paper mainly consider the friction plate finite element modeling frictional contact conditions between the slices of components, friction plate assembly of the strength and stiffness of the. Through modal analysis of force and its distribution in different layers of friction plate assembly friction plate, a friction plate component analysis layers, friction plate by the effect of preload on the friction plate assembly strength, and in this state analysis of the friction plate stiffness. On the contact state under different friction plate layers, different pre tightening force under stress, stiffness were compared, the effect of contact on the stiffness and friction plate component strength.
Experimental and Numerical Studies of Violin Bridge Vibration Mechanism
Authors: Zhang Cheng Zhong , Ye Bang Yan , Liang Li Dong , Jia Xiong , Zhang Guang Ming
Published: September 2013

A violin bridge kept in place by the pressure of the four strings has a powerful effect on the tone of the instrument. Its dynamic mechanical behaviors are investigated using finite elemental modeling and experiments in this paper. Modal and frequency response analysis of an isolated bridge are carried out. Numerical results show that the frequency responses are related to the vibration modes of the bridge. Particularly, the bridge hill is due to the bridge itself, and linked to the in-plane rocking mode of the bridge near the bridge hill peak. Three-dimensional dynamic forces exerted to the violin plates by the strings and bridge are then experimentally measured using a dynamometer. The experimental results are then analyzed and correlated to the simulation. The frequency response analysis of an isolated bridge is demonstrated to be a potential tool to study the mechanical behaviors of the violin bridge.
Influence of Workpiece's Size on the Structure and Performance of Grinding-Hardened Layer
Authors: Liu Ju Dong , Yuan Wei , Chen Meng
Published: September 2013

Based on the experiment of two-way plane grinding-hardening machine, this paper studied the influence of workpieces height size and grinding parameter on the microstructure, micro-hardness and hardening depth of grinding-hardened layer. The results show that under this experimental condition, workpieces height size has no substantial influence on grinding-hardening, but while the height size increased, the micro-hardness and hardening depths average value of completely hardened zone presents trend of "saddle type". The workpieces quality of grinding-hardening can be improved by adopting reasonable workpieces height size.
Thermal Characters of the Air-Cooled High Speed Motorized Spindle for Wood-Working Machine
Authors: Ma Da Guo , Jiang Xin Bo
Published: September 2013

The structure and composition of the air-cooled high speed motorized spindle for wood-working machine and some features relative to the metal cutting motorized spindle are introduced briefly. Then the main heat sources and heat dissipation mechanism of the air-cooled motorized spindle are thoroughly analyzed, finite element model of the air-cooled motorized spindle is built, the motorized spindles temperature distribution under thermal steady state and the influence of speed are analyzed. The results show that air cooling relative to the water or oil cooling has many advantages and reasonable heat dissipation structure design of air-cooled motorized spindle could meet the requirements of the high-speed motorized spindle for wood-working machine.
Influence of FTS's Dynamic Character on the Machining Error
Authors: Hou Guo An , Sun Tao
Published: September 2013

Fast tool servo (FTS) is widely utilized to fabricate optical freeform surfaces with nanometric surface roughness and with sub-micrometric form errors. FTSs dynamics character plays the major part in many factors that influence machining error. In this paper, a dynamic model for FTS is built up to describe its dynamic and to analyze the effects on machining error under different work frequencies. It was found that FTS dynamic mainly affect the Y direction machining accuracy of the workpiece surface, with the increase of the working frequency of FTS, the error caused by FTS dynamic also increases rapidly.
ABAQUS-Based Numerical Computation and Experiment Research on Silicon Rubber Mould’s Deformation during DPVC Process
Authors: Zhang Zhuang Ya , Zhang Hai Guang , Wan Fu Ping , Liu Yuan Yuan , Hu Qing Xi
Published: September 2013

Aiming at exploiting the impact of filling rate and pressure difference on thin-wall product during filling stage of differential pressure vacuum casting (DPVC) process and based on Yeoh model, a finite element mathematical structure model of silicon rubber is proposed. Employing nonlinear Finite Element Method (FEM), the impact of soft moulds deformation on products dimensional precision during different pressure difference is studied. Finally, the experiment carried out on a sample machine verifies that the solution of established finite element mathematical structure model of silicon rubber is very close to experiment result and thus provides an effective method for optimizing the pressure difference and mould optimized design.
Research on the Automatic Programming System of the Bone Scaffold 3D Printer Manufacturing
Authors: Liu Yuan Yuan , Zhang Fu Hua , Chen Wei Hua , Yan Fei Fei , Zheng Lu Lu , Hu Qing Xi
Published: September 2013

STL file is the data source of the technology. As the basis of the technology, the information of the STL file must be picked up, post-processed, and then the G code file which is tallied the PMAC rule generates as a .CFG file form in the environment of VC++. Finally, the goal of programming automation achieves after the pre-processed and post-processed of STL file. The G code downloads in the PMAC Motion Controller to control the additive manufacturing system to manufacture the bone scaffold. It realizes the automation process from the STL file of the bone to the bone scaffold in tissue engineer.
Information Modeling and Visualization of Assembly Fat Model for Large-Scale Product
Authors: Bao Jin Song , Wu Dian Liang , Cheng Qing He , Pan Jian Hui
Published: September 2013

Assembly processes are very complex and hard to setup in one-time for large-scale products. Much assembly information is produced in various assembly processes and such information has not integrated or considered for next assembly processes. This leads to problems of deciding manufacturing tolerance of productions quality in the final assembly process. An object-oriented assembly information model and visualization for VAFM (Virtual Assembly Fat Model), is presented in the paper. The information modeling for assembly processes considers not only geometry data, but also non-geometry information, and those information produced by assembly process evolve, mature and derived during the whole assembly process. The paper presents modeling language based on XML and distributed storage based BSON for assembly object. The visualization of VAFM is also presented.
Research on Workshop Equipment Information Transmission Based on Wireless Sensor Network
Authors: Yang Guang You , Chen Li Peng , Ma Zhi Yan , Zhang Zheng
Published: September 2013

In order to avoid the cumbersome wiring, limited transmission distance, high power consumption and high cost etc when using cables to transmit data in production workshops, a data transmission system combining ZigBee with USB is researched in this paper. The system hardware adopts the structure of wireless MCU CC2430 and USB interface chip CH372, the software uses the ZigBee2006 protocol stack and the USB2.0 protocol. The paper presents the hardware architecture and principle of the system and analyzes the program design of the upper and lower machines. The laboratory test results indicate that data can be transmitted from any PC to the specified one stably through ZigBee multi-hop network and the USB bus. The implementation of the experiment system has laid the foundation for the wireless data transmission between workshop equipment.
Volumetric Error Model of Large CNC Machine Tool and Verification Based on Particle Swarm Optimization
Authors: Liu Yi Lei , Gao Dong , Cui Gang Wei
Published: September 2013

Volumetric error has large effect on machine tool accuracy; improving CNC machine tool accuracy through error compensation has received significant attention recently. This paper intends to represent volumetric error measurement based on laser tracker. The volumetric error is modeled by homogenous transformation matrix with each coordinate corresponding to each motion axis. Based on parts of spatial points volumetric error, the geometric errors which affect volumetric positioning error are verified through particle swarm optimization with the L2 parameters as the target function. The chebyshev orthogonal polynomials are applied to approximate geometric errors.
Simulation Research on Fluorescent Lamp Power Factor Based on Multisim
Authors: Wang Rui Kun , Zhao Tian Feng , Cao Jian Bo , Luo Han Pin , E Shi Ju , Zhou Chao
Published: September 2013

The fluorescent lamp circuit experiment and the power factor improving experiment are both two traditional experimental projects in electrotechnics. It is very important for students to understand basic theory and develop experimental operation ability. Based on studying the basic structure of fluorescent lamp circuit and its working principle, a fluorescent lamp circuit schematics was built by using Multisim interactively. The simulation experiments were done based on the circuit. It could effectively save the time and cost of development. The parallel-capacitor circuit was designed to improve the power factor, and the experiments were done to compare power factor and phase between with and without the parallel capacitor. The study could help students learn and understand well this part, which has good promotional value.
Reach on Micro-Motor Acoustics Fault Diagnosis Based on Loose Wavelet Neural Network
Authors: Li Ying Ge , Wang Gui Tang , Li Zheng , Yin Xin Liang
Published: September 2013

Nicro-motor voice signal contains abundant running status information as well as vibration signal, aiming at the problem that it is difficult to obtain vibration signal in the production line of micro-motor, this paper proposes a micro-motor acoustic fault diagnosis methods based on loose wavelet neural network. Wavelet packet decomposition and reconstruction algorithm is utilized to extract micro-motor voice signals in each frequency band energy as the characteristic parameters of fault characteristic parameter samples will input to improve the BP neural network for training, build up the fault type of classifier, the realization of fault intelligent diagnosis. Application results show that a reasonable design of neural network has strong ability of fault identification; use loose micro-motor acoustic wavelet neural network fault diagnosis is feasible.
Establishment of the Prediction Model for Ferrite Surface Roughness in Ultrasonic Vibration Grinding
Authors: Dong Guo Jun , Liu Jian Mei , Zhou Ming , Xu Zhi Qiang
Published: September 2013

In this paper, the author performed orthogonal tests of ultrasonic vibration grinding on ferrite in the DMG machining center, and established a prediction model of ferrite surface roughness in ultrasonic vibration grinding with multiple linear regression analysis method based on the test results, and carried out significance tests on regression equation and regression coefficient, showing that the prediction model had high credibility, the effect of spindle speed and amplitude of ultrasonic vibration on surface roughness was significant, but of grinding depth and feed rate was not obvious.
Design for New Actuator Based on Electroactive Polymer
Authors: Wu Zhong Yao , Zhao Tian Feng , Cao Jian Bo , E Shi Ju , Chen Chun Xiao
Published: September 2013

Dielectric elastomer is a kind of electroactive polymer material with optimal performance. As actuator material, dielectric elastomer has shown a good prospect. Based on studying the principle of electroactive polymer, a new type of cylindrical actuator was designed. Its 3-D figure and 2-D dimension drawing was finished by UG software. The animation simulation of the actuator was studied. The simulation results verified the feasibility of design scheme. Electroactive polymer will have broad application prospects in the field of actuator.