bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of Hadoop-Based Massive Intelligence Data Management System
Authors: Zhao Guo Lin , Shi Zi Yan , Hu Qiao Lin
Published: October 2014

With the rapid development of computer technology, especially with the popularity of the network, there are more requirements of the information in the battlefield. The increasing amount of intelligence data should be handled. This paper is discussing how to store and handle the massive intelligence data, which is very massive, complicate, correlative, isomerism, and etc. Storage resources, computing resources, network resources, and so the performance requirements should be improved. This research focuses on the massive data management and the efficiently accessing.
Control Software Framework ECSF for Experiment Based on CORBA and Agent
Authors: Tang Zhong , Xie Yue
Published: October 2014

The control system for Inertia Confinement Fusion (ICF) experiment facility is based on a scalable software framework and can implement centralized control of thousands of devices and roboticized experiment processes. Experiment Control Software Framework (ECSF) is the control software framework specially for large-scale experiment facility, colligating advantages of CORBA and Agent. By the reuse at the system level, control software can be fleetly constructed. Software device Agent based on OOD is the base of framework. Centralized manager and common module implement events, alerts, reservations, logging, data archive, flow and arithmetic management. Several connection managements are also provided for the member of the framework. Taking patch energy subsystem as an example, the instantiation of the framework is introduced to validate the feasibility and validity of ECSF.
Research on the AE Characteristic of the Rock with Rockburst Proneness
Authors: Li Mo Xiao , Zhang Guang , Chen Jing Xi
Published: October 2014

In this paper, in order to strengthen the prediction of rockburst and inquire the relationship between the rockburst proneness of rock and its AE characteristic, each kind of typical rock of volcanic, sedimentary and metamorphic were selected to doing indoor rock mechanics experiments. Calculate the rockburst proneness of these rocks by uniaxial compression tests. In uniaxial compression, we collect the entire process of AE signals by using acoustic emission instrument, then we analysis the AE characteristics of different rocks to inquire the relationship between the AE characteristic and its rockburst proneness.
Analysis on Stamping Forming Simulation and Springback Control of High-Strength Steel Auto-Body Panels
Authors: Wang Bi
Published: October 2014

In recent years, the high-strength steel has been widely used in the automotive industry. As the high-strength steel sheet is prone to producing forming defects and serious springback problem in the stamping forming process, the finite element technique is used to simulate the value of stamping forming and springback process, so as to improve the stamping parameters and mold design according to the simulation results to achieve effective control of the springback value and efficiently improve the manufacturing precision of covering parts.
Research on Identification of Vehicle Steering Angle
Authors: Rui Yu
Published: October 2014

Based on Radial Basis Function neural networks , a method of identifying vehicle steering angle is proposed for further investigation of the vehicle handling inverse dynamics. According to the simulation results of a two-degree-freedom closed-loop system and the test of double lane change maneuver, the mapping relationship between vehicle yaw velocity, lateral acceleration and steering angle can be found. The identification results show that the method is not only feasible, but also with high accuracy, little computation requirement and good stability.
Residual-Heat Utilization and Optimal Reformation in PVC Production
Authors: Mao Wen Rui , Wei Xin Li
Published: October 2014

The paper takes the actual problems of target enterprises in PVC production as an example. The paper transforms residual-heat waste status in production and optimizes the key equipment, cooling water system of internal cooled of polymerization reactor, which not only reduces energy waster and reaction time of single reactor, but also improves production efficiency. So it saves energy for target enterprises and makes considerable economic benefit.
Research on Electric Vehicle Motor Control Technology Based on Non-Sensor
Authors: Ren Peng Fei , Geng Shi Yong
Published: October 2014

In the concept of energy-saving, emission reduction and green environmental protection idea, electric cars emerge as the times require. Its appearance makes the driving system of vehicle change from the original fuel engine into electric energy, which can be regarded as the milepost of automobile manufacturing industry. The promotion and usage of electric vehicle not only greatly reduces fuel consumption, but also further reduces the pollution of the environment. In the electric vehicle research and development process, the motor control is a key technology; and the previous designs adopted the sensor technology. Although this method is simple and convenient, yet the sensor increases the cost, but also influences the reliability of the control system. Therefore, it is necessary to explore a motor sensorless control technology. Based on this point, this paper makes a research on electric vehicle motor control technology based on non-sensor.
Short Time Interval Measurement Method Based on Compensation
Authors: Yu Hua
Published: October 2014

In this paper, we use a compensation method of the measured short interval to improve the measurement accuracy by two groups of multiplex. By using two groups of multi-channel monostable pulse signal as a compensation signal, we respectively compensate time difference between the starting/ending measured short time interval and the reference signal. Pulse width of each compensation signal is uniform increasing and incremental sum is a reference signal cycle. We select the average value of two compensation signals pulse width as the beginning and the end of the time difference when the reference signal value jumps after compensation. Then according to the number of reference signal and two compensation time difference we can obtain measured short time interval. Error analysis and evaluation of uncertainty measurement show that the precision of this method is decided by pulse width increment of adjacent compensation signals. The experimental data shows that the method effectively reduces the measurement error of one reference signal cycle in the measurement of time interval.
Vertical Displacement Accuracy Analysis of Foundation Pit Monitoring
Authors: Zhang Guang , Chen Chang Chuan , Yang Yi Wen , Jiang Xiu Ling
Published: October 2014

Foundation pit monitoring requirement for data accuracy is very high, especially the deep foundation pit. Monitoring data accurate or not directly related to the project of construction safety and worker safety. This paper analyzes the influence factors of foundation pit vertical displacement monitoring, Combined with practical engineering to improve the accuracy of monitoring, the conclusion: Reasonable layout of monitoring point reasonable ,Fixed observers,Fixed level and matched leveling rod,Take an umbrella when high light intensity,Observation in construction vibration is small, such measures can effectively improve the accuracy of monitoring data
Analysis and Application of Pumping Waste Filling Material Performance
Authors: Wang Gong Zhong
Published: October 2014

Based on the important role in aspects of Backfill mining technology in mining to resolve the deep pressure , maintain the slope steady, control the surface sinking and protect the ecological environment, this article probes the relationship between filling material strength to gangue for coarse aggregate ,to coal ash for fine aggregate, to cement and waterglass for binder and influencing factors, and researches the strength properties and the deformation properties of filling objects used for engineering practice, which gets good filling effect. The results showed that the filling material having a high early strength and high elastic modulus, when compressed it performance plastic hardening characteristics; under certain conditions of the concentration by mass and the amount of coal ash, filling mass showing the approximate linear relationship between the compressive strength and natural curing time, Under the same condition, cement + water glass as cementitious material filling mass is significantly higher than only with cement as a cementitious material in the strength.
Effects of Naphthalene-Based Super Plasticizer on the Performances of Whole Tailings Backfill Materials
Authors: Fan Zuo Peng , Zhang Zhong Hui , He Qian , Cai Meng Qian , Shi Chen
Published: October 2014

According to existing backfill process of the Jiaojia Gold Mine, this research uses the whole tailings as fill aggregate to replacement grade tailings. The solid concentration of backfill slurry was increased from 68% to 72% and the naphthalene-based superplasticizer was used to achieve gravity well-distributed transport. The effects of naphthalene-based superplasticizer on the sedimentation rate, bleeding rates, fluidity and compressive strength of the whole tailings backfill materials were investigated with different content. The results show that naphthalene-based superplasticizer can slow the sedimentation rate, improve the fluidity of whole tailings backfill slurry and increase the compressive strength. The fluidity of the whole tailings backfill slurry with 0.3% naphthalene superplasticizer is largest and the compressive strength is highest in all of the specimens.
A Further Research on the Properties of PLA/TiO2 Nanocomposites
Authors: Luo Yan Bing
Published: October 2014

Organic/inorganic nanocomposites have been widely focused because of their special properties. By modifying nanoTiO2and polylactic acid (PLA) with lactic acid, PLA/TiO2nanocomposites was prepared, and the test on the dynamic mechanical property, thermal property, and thermal deformation temperature showed that adding nanoTiO2helped improve PLA's mechanics property, thermal decomposition temperature, and thermal deformation temperature to certain extent.
E|Benchmark - Approaches and Methods for Assessing the Energy Efficiency of the Industrial Automated Product Manufacturing
Authors: Kreitlein Sven , Rackow Tobias , Franke Jörg
Published: October 2014

This paper introduces a method for the assessment and evaluation of energy efficiency of the manufacturing processes in the production as well as a corporate and cross-industry comparison. Already today, energy-related characteristic value systems are used, which are related to the energy consumption of large electronic household appliances or are focusing on their production facilities. The energy efficiency value is a newly developed indicator and will provide valuable information about the energy efficiency of the production of various products, production operators, and consumers. In the following, the energy efficiency value, which is based on the approach of minimal value calculation, is presented in detail. The basic idea is the comparison and evaluation of energy efficiency based on the ratio of the theoretically required energy consumption to the actual energy consumption. Depending on the analysis of influencing factors, a model highlighting their dependencies could be established. The developed system hinges on a successive calculation of the minimum value. Each of these minimum types can be put in relation to the measured energy consumption. However, depending on the chosen basis, the conclusion and focus of the calculated key figure may vary. By using the real minimum as a basis, the actually existing energy savings become visible. The method will be put to the test through an exemplary application for processes in the fields of cutting technologies. This course of action allows for the validation of the developed energy efficiency value and reveals the potential of this method.
Energy Efficient Manufacturing of Lightweight Products Illustrated by a Structural Optimization of an Automatic Knife Cutting System
Authors: Freiberger Stefan , Ellert Florian , Weeber Max
Published: October 2014

Due to the growing usage of industrial textiles (e.g. glass fiber, carbon fiber, aramid fiber) production sites in the automotive, aerospace, defense and wind power industry are equipped with automatic knife cutting systems. Energy efficient cutting is necessary to manufacture high quality and cost-competitive lightweight products. Therefore, the energy consumption of an automatic knife cutting system was analyzed in this paper using a flexible energy metering equipment. Based on the results different technical measures to reduce the energy consumption were developed and assessed for their economic viability.Total energy saving potentials of up to 29.1% were identified. Yet, the example of the automatic knife cutting system also showed that the energy saving potentials and the economic viability of their implementation do not always correlate.
Contribution for the Life Cycle Oriented Evaluation of Costs and Resource Efficiency of Production Machines in Procurement
Authors: Schmidt Vanessa , Graßl Markus , Reinhart Gunther
Published: October 2014

Even though the share of the production machine’s environmental impact might be negligible compared to the product’s own use phase, the environmental impact at the factory site of is potentially significant. Thus, this article presents a contribution for the life cycle oriented evaluation of costs and resource efficiency applied in procurement of a production machine.
Methods for Selection of Measuring Instruments
Authors: Toteva Pavlina , Vasileva Dimka , Mihaylova Nadezhda
Published: October 2014

One of the tasks at planning of quality inspection is selection of measuring instruments. The measuring instruments are the most important part of the measuring process so their selection have to be done carefully. The selection of measuring instruments is a complex task, which depend on the size, the character and the value of measured magnitude. The purpose of this paper is to analyze the existing methods for selection of measuring equipment. In the paper are presented the advantages and disadvantages of existing methods and recommendation for their implementation, according to the metrological tasks given. There are results obtained, using the Measurement System Analysis (MSA), for: selection of the correct measuring instrument and method; assessment the capabilities of measuring instruments; assessment of the procedures and operators; assessment of any measuring interactions, calculating the uncertainty of measuring of individual measuring instrument and/or measuring systems.
Evaluating the Process of Introducing Project-Based Learning in the Curriculum of Engineering Students
Authors: Panaite Carmen Ema , Dodun Oana , Gonçalves-Coelho António
Published: October 2014

The paper presents a questionnaire elaborated for evaluating an academic educational program of the “Gheorghe Asachi” Technical University of Iaşi, Romania. The work was inspired by the attempt to introduce of Project Based Learning pedagogy method in the curricula of Romanian students of mechanical engineering.
Basics of the Graphical Representation of Parts - Views and Sectional Views
Authors: Clinciu Ramona
Published: October 2014

The proposed paper presents applications developed in 3D Studio MAX programme, by using the mapping techniques and the animation facilities available in this programme. These applications are frequently used in teaching technical drawing and they reveal the principles and methods for constructing and modelling different types of parts and their appropriate orthographic projections. Since the parts considered are parts that are usually met in engineering, the applications presented prove to be a helpfull tool for learning and education in engineering. Graphical representation and solids modelling are very important in teaching technical drawing and the applications developed on this purpose use the facilities available in the 3D Studio MAX programme the rendering, mapping and animation techniques and the experience of the author in teaching graphical subjects. The applications presented include different 3D shapes of parts and they are presented gradually, in a manner which facilitates the development of the spatial skills of the students, making easier the effort for understanding the connection between the shape of the part and the types and the minimum number of orthographic projections - views and/or sectional views needed for defining the part. The realism of the scenes created in the the 3D Studio MAX programme help students understand easily the shapes of solids and make quickly the connection between the spatial shape of the part and the appropriate number of orthographic projections needed for representing the part, making the lessons more atractive for the students.
A Study of Single Point Incremental Forming by Finite Element Analysis
Authors: Abass Khalil Ibrahim
Published: October 2014

The Single Point Incremental Forming Process (SPIF) involves extensive plastic deformation. The description of the process is more complicated by highly nonlinear boundary conditions, namely contact and frictional effects have been accomplished. The SPIF analysis is mathematically complex. However, due to the complex nature of these models, numerical approaches dominated by the FEA are now in widespread use. The paper presents the data and main results of a study on SPIF through FEA, that permits the modeling of complex geometries, boundary conditions and material behavior. SPIF have been studied under certain process conditions referring to the test workpiece, tool, etc., using ANSYS 11.0. An important result is showing that the model of simulation can give as clearly the behavior of contact tool - workpiece and the effect it on strain and stress distributions, also on the accuracy of product. Relevant dependences between tool and workpiece surface interface and sample of results have been demonstrated.
Finite Element Analysis to Improve the Accuracy of Parts Made by Stainless Steel 316L Material Using Selective Laser Melting Technology
Authors: Păcurar Razvan , Păcurar Ancuţa
Published: October 2014

One of the serious problems in the SLM process, using metallic powders is the thermal distortion of the model during forming. As a result of the locally concentrated energy input, the temperature gradient mechanism and the related processes lead to residual stresses and part deformations. Since the solidified part is cooled rapidly, the model tends to be deformed and cracked due to the thermal stresses. All these aspects were considered for a series of analyses that were made using the finite element method in order to determine the optimum process parameters (laser power, scanning speed, powder bed temperature) that are required in order to improve the accuracy of the metallic parts made by Stainless Steel 316L material using the Selective Laser Melting process.
Shear Resistance of Joints Spot Cold Pressure Welding
Authors: Georgescu Bogdan , Mihăilescu Dănuţ , Gheonea Marius Cornel
Published: October 2014

The statement from the specialty literature that with the increasing diameter of spot welded by cold pressure decreases the amount of resistance to shear force is due to reporting of the breaking by shear at the circular section of the point. Our experimental research shows that a welded cold joint in spots, correctly done, will be torn off near the weld spot by drawing the point from one of the tins. By reporting the force to the real section of breaking it resulted a constant shear resistance, no matter which the size of the welded point was. Therefore, the approximate theoretical calculation of the breaking force of a cold welded point, correctly executed, can be achieved by knowing the mechanical properties of the metal base and taking into account the real section of the breaking point given by points periphery and the thickness of the panel after deformation. The calculation is encompassing, because due to cold hardening, the real mechanical characteristics are higher.
Studies on the Corrosion Behavior of Deposits Carried out by Thermal Spraying in Electric ARC – Thermal Activated
Authors: Toma Stefan Lucian , Baciu Constantin , Bejinariu Costică , Gheorghiu Diana Antonia , Munteanu Corneliu , Cimpoeşu Nicanor
Published: October 2014

This paper presents a comparative study on the corrosion behaviour of the Al depositions, obtained by thermal spraying in electric arc - the classic method (ASP) and the Al deposits behaviour, carried out with a thermal spray combined device (CTSD). The use of CTSD allows the thermal field modification of the spraying jet and implicitly the modifying the mechanical, physical and chemical properties of the deposits of aluminium. Evaluation of the corrosion behaviour of the aluminium deposits was achieved by exposure to salt water - sea water (3.5NaCl). The corrosion products, formed on the surface of the coatings, were investigated based on the photographic records, electronic microscopy – SEM and X-ray diffraction. The aluminium oxide, obtained on the depositions, carried out by using CTSD - exposed in saline environment is more adherent then the oxide obtained on the deposits, carried out through ASP - which leads to a loss in thickness.
Experimental Study of the Laser Cutting Process on 1C45 - 3 mm Steel
Authors: Petrianu Cristian , Inţă Marinela , Manolea Daniel , Muntean Achim
Published: October 2014

The Paper Presents the Measurement Systems Analysis, System Capability and Optimization of a Laser Cutting System for 3 Mm Alloy Steel. for the Measurement System Analysis and System Capability the Data was Introduced in a Excel Sheet which was Designed According to QS9000 Standard (Measurement System Analysis) to Calculate the Measuring System Repeatability, Reproducibility and Capability. Design of Experiment (DOE) was Used for Process Optimization the Optimization was Conducted in an Operational Manufacturing Environment and was Based on the Design of a 25 Full Factorial Experiment. the Laser Parameters (input) were Feed Rate v, Gas Pressure p, Power P, Frequency F and Efficiency R while the Response was the Roughness Rz. it was Analyzed the Influence of Laser Parameters on Roughness to Obtain a Complex Relationship to Show Roughness Rz Variation According to these Parameters, to Minimize the Rz and Maximize the Feed Rate.
Some Researches Regarding the Durability of the Metal Carbide Cutting Inserts Coated with Ti Thin Layers
Authors: Bădănac Ana , Lupescu Octavian , Manole Vasile , Popa Sorin
Published: October 2014

It is known that the unevenness of the cutting depths during the cutting processes, the different physico-mechanical characteristics of the processed materials, values as well as the parameters variation of the working regimes can lead a wear more or less pronounced of the used cutting tools. The lubricant presence in the cutting area may contribute to the friction and thermal field values reduction, affecting the wear processes. It can be said therefore that, the tools durability is influenced by all these factors, which requires decisions and actions to reduce the tools or/and the cutting inserts wear processes. In case of the cutting inserts are known many researches concerning their coverage with material (ions) by vacuum deposition, using methods as: electric arc evaporation, pulverization, ionic plating and chemical vapor deposition. Researches carried out by authors had consisted in making titanium deposition, in thin layer, on the cutting inserts surface in their hardening purpose. The results obtained consisted in a substantial increase of the durability for the used tools in cutting processes in report to those, whose cutting inserts were coated with titanium.
Influence of Some Factors on Surface Roughness Parameters at Electrical Discharge Machining
Authors: Ciubotariu Vasile , Câcu Adrian , Rotundu Ioana Andreea , Cucoş Marius Marian , Coteaţă Margareta
Published: October 2014

There are various electrical discharge machining techniques and experimental researches could be necessary in order to establish the operating conditions for an optimal machining process. Some theoretical considerations concerning the process of generating the surface asperities as a consequence of the electrical discharge machining process were elaborated. Experimental method was applied in order to evaluate influence exerted by some input factors (pulse on time, pulse off time, average intensity of electric current) on certain surface roughness parameters (Ra, Rz, Ry and Rq). One developed an experimental research by using a copper tool electrode and a workpiece made of high speed steel, in accordance with the requirements specific to a complete factorial experiment with three independent variables at three levels. A ram electrical discharge machine was used as machining equipment. One measured the surface roughness parameters specific to the machined surfaces. Empirical mathematical models of type power functions were established by using the method of least squares.
Nonconventional Machining Based on Electrical Charged Particles Motion in Liquid
Authors: Slătineanu Laurenţiu , Coteaţă Margareta , Beşliu Irina , Caracaş Geo , Bosoancă Gheorghe , Mircescu Ciprian
Published: October 2014

Nonconventional machining methods are based on the transfer of the energy to the work zone in ways distinct from those applied in the case of the so-called classical machining methods. A group of nonconventional machining methods achieve material removal from workpiece by using the motion of the electrical charged particles in a liquid. Practically, some machining techniques included in the larger groups of electrical discharge machining and in electrochemical machining are based on the motion of electrical charged particles in fluid. The problem addressed in this paper is to identify the zones where differences between the two groups of machining methods appear. A theoretical analysis was developed in order to identify the common aspects and respectively the differences between the electrical discharge machining and electrochemical machining, if the machining liquid is considered. Some experimental tests were developed to highlight aspects specific to the above mentioned machining techniques. The research facilitated obtaining a more complete image of some common and distinct characteristics of electrical discharge machining and electrochemical machining. The significance of the electroconductive or insulating properties of the work liquid was highlighted.
Active Screen Plasma Nitriding Efficiency and Ecology
Authors: Țugui Cătălin Andrei , Axinte Mihai , Nejneru Carmen , Vizureanu Petrică , Perju Manuela Cristina , Chicet Daniela Lucia
Published: October 2014

Plasma nitriding has significant advantages: very low running costs (reduced consumption of energy and gases); optimized structure and layers; and nitriding of stainless steels. Plasma nitriding is totally safe and has no poisonous gas emissions and no negative environmental impact. However, conventional plasma nitriding has a number of well-known difficulties, including the direct application of plasma on the parts to be treated, the risk of arcing, hollow cathodes, white layers, non-homogenous batch temperature and the impossibility to mix parts of different geometries in the chamber made this technology to be almost forgotten. In the last years, due to the ecofriendly character of the technology, several atempts were made in order to establish an improvement in this technique in terms of batch damages. Active screen plasma nitriding technology is a new industrial solution that enjoys all the advantages of traditional plasma nitriding but does not have its inconveniences. A comparative study regarding quality surface and formed layer properties between conventional plasma nitriding and active screen plasma nitriding was conducted, in order to highlight the advantages that comes with this relatively new technique.
Alloys with Acoustic Properties
Authors: Hopulele Ion , Axinte Mihai , Nejneru Carmen
Published: October 2014

Considering that, in Accordance with the Laws of Physics, the Sound Travels only through Elastic Bodies, the Main Characteristic of an Acoustic Material is the Elasticity. Classifying the Metallic Materials in this Regard is Quite Difficult, as the Elasticity is Characterized by more than One Component (static Elastic Modulus, Dynamic Elastic Modulus, Static Elastic Limit, Elastic Limit, Elastic Deformation Linearity, Damping Capacity). Best Acoustic Properties of some Metallic Materials are Widely Used in the Construction of Transducers, Musical Instruments, Bells Etc. for this Purpose, a Study on Three Metallic Materials was Conducted: a Cusn Alloy for Bells, a Cast Aluminum Alloy and a Martensitic Cast Iron. this Study Highlights both the Chemical Composition, Structure, Mechanical Properties and Damping Capacity of Sounds.
Pneumatic Muscle Actuated Parallel Asymmetric Gripper System with a Mobile and a Fixed Jaw
Authors: Negrea Doina
Published: October 2014

Pneumatically actuated gripper systems are frequently used in various applications due to their multiple advantage, and particularly to their specific feature known as compliance. This is what allows manipulation of fragile objects and ensures their soft contact with the gripper jaws. The paper presents and discusses such a gripper system actuated by a pneumatic muscle. Structural, constructive and functional models of a novel gripper system are presented and its main motion characteristics highlighted.
The Tightening Accuracy of Workpieces in the Multiple Clamping Devices
Authors: Seghedin Neculai Eugen , Chitariu Dragoş Florin
Published: October 2014

Fixtures are used for orientation-positioning-tightening of workpieces during machining on machine tools. Multiple clamping fixtures are intended to clamp several workpieces for simultaneous or successive machining. Multiple clamping is characterized by a series of economical advantages, due to the reduction of total machining time. These advantages are more important once the number of workpieces is higher or if the machining is made with compound tools. Due to the complexity, overall size and the high number of components, the multiple clamping fixtures have diminished accuracy than simple fixture due to elastic and contact deformations of fixtures housing, of supports etc. Also, multiple clamping fixtures present diminished rigidity and dynamic stability. From the analysis of the specialized literature results that there are a few paper on the subject of multiple clamping. In the paper there are presented the causes that can lead to the diminish of the accuracy of multiple fixture. The modalities for the determination of fixtures precision are presented, also, for the parallel and serial multiple clamping fixtures.
Innovative Solutions for a Shoe Sole Cleaner
Authors: Lihtețchi Ioan , Sava Rodica , Lihtețchi Mariana
Published: October 2014

The paper refers to an original device, designed by the authors, which provides cleaning for shoe soles when a person enters into a home. This device resembles an ordinary scale and provides cleaning without causing pollution. It is composed of a flexible strip with a brush on the active surface. The dirt is collected by means of tabs that allow its storage in a drawer cell. The device has a simple structure, but originally, it is different from other similar products available worldwide. It is easily accomplished by using existing components (eg. a drill with helical gear). It is easy to maintain and can be powered from any AC grounded outlet 220 V.
Approach of a Particle Statics Problem by Using the Bond-Graph Modeling Method
Authors: Ibănescu Radu , Ungureanu Cătălin
Published: October 2014

The paper presents a new approach to the numerical solution of a particle in equilibrium lying on a circle and subjected to the action of a linear spring. The difficulties of solving such a problem and the Mathcad and Simulink based solutions are presented in [1, 2, 3]. The most important difficulties consist in symbolically solving a forth degree trigonometric equation or in solving a complicated trigonometric inequality. This is why a numerical solution is preferred. The use of the bond graph modelling method for solving this problem of equilibrium is presented in this paper. The bond-graph modelling method is designed only for dynamics and the paper presents the possibility of its adaptation for solving this problem of statics of a particle. This approach can be then applied to solve other problems of statics. From the bond graph model the equilibrium equation and the block diagram model can be obtained. The block diagram model is usually preferred in engineering and, for this reason, the block diagram model obtained from the bond-graph model is shown in the paper together with the numerical results obtained after performing the simulations. The results are compared with those previously obtained in [2, 3].
The Influence of Changing the Parameters of Electrical Components Implementing the Active Reduction of Vibration
Authors: Białas Katarzyna , Buchacz Andrzej
Published: October 2014

The structural and parametric analysis presented in this work is understood as an inverse task of dynamics. The solution to this task is to obtain structure and parameters of a system meeting initial requirements. This synthesis may be used as a non-classical method of designing mechanical systems [1÷7]. The presented work extends this issue. Apart from designing a system consisting solely of passive elements, it also describes a subsystem, whose operation reduces undesired vibration of the primary system. The basic analysis which will be performed is to test the influence of applying electric elements on the primary mechanical set [1,3,6]. The analysis will be done on the example of system which were obtained while conducting the structural and parametric synthesis. In order to design a system including an active subsystem in the form of electric elements reducing vibration by means of a non-classical method of designing.
Functional Diagram for Modeling the Electromagnetic Ball Valve with Cylindrical Seat
Authors: Zahariea Dănuţ
Published: October 2014

The main objective of this work is to perform numerical analysis of an electromagnetic normally-closed direct-acting ball valve with cylindrical seat. A functional diagram is developed using the MATLAB/Simscape/SimHydraulics programming language. The principal elements of the functional diagram are: the fixed-displacement hydraulic pump, the ball valve which is driven by an electromagnetic actuator, the pressure-relief valve, pressure and volumetric flow rate measuring devices and the hydraulic pipes. Two sets of analyses are performed, the first one for an ideal case, without the effects that are associated with the hydraulic pipes and the second one for the real case, with these effects. The valve flow factor is presented, comparatively, for both cases, as well as the volumetric flow rates through the ball valve and the pressure relief valve, and finally the pressure drop in the valve.
Linear Motion Actuator Using Magnetorheological Fluid Properties
Authors: Calarasu Doru , Scurtu Dan , Ciobanu Bogdan
Published: October 2014

This paper presents a new type of actuator that uses the properties of a magnetorheological fluid. This actuator allows you to control the speed of a mechanical element and its positioning .The paper shows the conceptual model of the item, the schedule of experiments and their results. There are piston-cylinder type actuators that use magnetic fluid and have internal parts in relative motion. We propose an actuator does not have internal parts in relative motion and neither internal seals. There are shown the results obtained for the mechanical parameters of a new type of actuator with elastic elements, with linear motion. This actuator uses magnetorheological fluid properties. There are presented the constructive elements of the actuator, the properties of the magnetorheological fluid, the calculation procedure of the hydraulic and mechanical parameters and the obtained results. The results confirm the possibility of using it in various technical applications.
High Speed Impact Virtual Studies Made on Projectiles Models for Designing Shields Based on Innovative Materials
Authors: Tataru Ion , Popa Dragos Laurentiu , Ilincioiu Dan
Published: October 2014

This paper presents two virtual devices made to determine the behavior of the bullet before, during impact and after the collision using different materials. First device was based on a pendulum and second was made with springs. The idea of making these virtual devices was to transform the kinetic energy of the projectile before the collision in a potential energy after impact. The difference between these two types of energies was going to deformations phenomena.
Contributions to the Design of the Load Station Concept Used at the Flexible Manufacturing Cell
Authors: Bungău Constantin , Pancu Rareş , Buidoş Traian
Published: October 2014

The present paper work shows theoretical and practical research for constructive solutions of the load station system for the working parts and tools in order to achieve a flexible manufacturing cell UO-1 that was realized at University of Oradea by retrofitting activity.
The constructive solution for load station is new and original and it was designed and effective produced in the Faculty of Engineering Management and Technology Laboratory, in order to be use at the flexible manufacturing cell for the loading and unloading of the working parts and tools by means of ABB robot IRC 1600.
Robotic Elephant's Trunk Arm with Flexible Spatial Positioning
Authors: Ciofu Catalina , Butunoi Paul Alin , Stan Gheorghe
Published: October 2014

In this paper, we describe a novel robotic elephants trunk arm with the possibility of spatial positioning that is used increasingly in wider applications as in surgery interventions and in industries where is required performing complex trajectories. We suggest innovation in robotic structures arms with a high ratio between length and arm diameter. This feature is compulsory in medical field to achieve minimally invasive incisions and accuracy. Our design concept offers a solution for structure miniaturization using a small number of actuated joints that are serially connected by discreet rigid links and implemented in the modular structure to achieve a high level of spatial accuracy and minimally diameter arm. There have been made and developed numerous similar designs some of them by [1, 2, 3, 4, 5], but without the advantage of our approach revealed in the kinematic analysis.
Machinability Aspects Investigations in Hard Milling of AISI W1 Hardened Tool Steel
Authors: Beşliu Irina , Slătineanu Laurenţiu , Coteaţă Margareta
Published: October 2014

The performance of a high speed milling process of hardened tool steel depends on various machining conditions which affect the surface quality achieved on the component, the cutting force involved, the mechanism of chip formation, etc. The paper propose is to experimental investigate the cutting forces involved in the machining of a difficult-to-cut material, AISI W1 steel of different hardness states.
The Description of a Distributed Parameter Process through a Finite Discrete Dimensional System
Authors: Şerban Sever , Şerban Doina Corina
Published: October 2014

This article analyses the process of warming a metal by using a walking beam furnace. This process is meant to offer the technologist objective information that may allow him to produce eventual modifications of the temperature references from the furnaces zones. Thus making the metals temperature at the furnaces exit to have an imposed distribution, within precise limits, according to the technological requests. This industrial process has a geometrical parameters distribution, more precisely it can be described through a partial differential equation, by being attached to dynamic infinite dimensional systems (or with distributed parameters). Using a procedure called geometric-time discretization (in the condition of the solutions convergence), we have managed to obtain a representation under the form of a finite discrete dimensional linear system for a process with distributed parameters.
Using Functional Requirements Formulation in Fault Tree Analysis Construction - A Way to Improve Product's Design
Authors: Banciu Felicia Veronica , Draghici George , Pămîntaş Eugen
Published: October 2014

In a technological system, the design has to be thought so that all the possible faults to be mitigated or avoided both in conceptual design and embodiment design phases. This is an ideal point of view because in reality the faults are present and sometimes it is a cumbersome task to find all the possible events and their causes. As a way to help these this paper presents the possibility to use the axiomatic design FR-DP decomposition in order to define the events from a Fault Tree Analyze, its construction, a combination of these two giving results that can be interesting for both methods.
Optimizing Decisional Process by Applying the Multi-Criteria Analysis
Authors: Fechete Flavia , Nedelcu Anișor
Published: October 2014

The decision is the focus of management activity since it was in all its functions, and more integration within the company environment depends on the quality of the decision. At the same time, the quality of decision has an important influence on cost reduction, efficient use of funds, profit growth, etc. Through this paper a short presentation of a sugar factory was prepared, also a SWOT analysis which revealed the strengths and weaknesses of the company, as well as possible strategies that may apply. Analysis outcomes revealed the problems of the enterprise, so we could present a possible measure to improve the activity by applying a multi-criteria analysis procedures. The case study of multi criteria analysis is focused on a management decision for improving production activity of the sugar factory.
Risks Assessment Applied to Manufacturing Processes - Case Study
Authors: Dumitrascu Adela Eliza , Buzatu Constantin , Dumitrascu Dorin Ion , Ciobanu Doina Valentina
Published: October 2014

The surface quality obtained by the manufacturing process depends on several factors determined by the particular cutting process. The task of optimization of design and making the process machining by one or more performance functions is very important. In this direction, between the simplest ways to make this optimization are: adapting the process parameters, optimization of constructive parameters of cutting tools, selection of working domain of cutting tools in accordance with the importance of performance criterions adopted to optimization. In this paper we are evaluate the risks using Failure Mode and Effects Analysis (FMEA) for a drilling process considering the equipment and measuring devices. The Process FMEA is used to identify the potential consequences of errors and omissions in the production process and develop the production control plan. In this respect, there are identified the factors that influence the manufactured products quality with emphasis on the interaction between failure modes and effects. Pareto charts are developed for specific potential causes of failure in order to determine and implement the methods of improvement, and the risks that have a significant impact on the manufacturing process, and every corrective action must be evaluated taking into account the expected risk priority value.
Enhance Competitiveness through Total Quality Management and its Components
Authors: Grecu Iuliana
Published: October 2014

Increased level of competitivity, continued growth of customers and society demands, and the increasing complexity of products have increased the importance of quality. If the competition could be defined only in few keywords, one of them would surely include the following: quality, innovation and demanding customers. Considering customers who demand quality and competition that responds to such requests, the organization tend to focus increasingly on total quality management - TQM. Although the evolution of the "quality" concept lasts a century, it remains a challenge for all organizations. According to these statements, this paper aims to highlight some aspects of the state of implementation and application of TPM, as a defining component of TQM. The questionnaire method was applied as statistical research method used to a sample of 31 companies in the automotive industry in Romania. The objective behind the survey was to obtain as much information as possible about TPM. The data obtained were statistically processed to more accurately portray the current image of the degree of concern for TPM and how the TPM is approached by companies who responded to the questionnaire.
Contributions to the Normalization of the Control Systems Used for Quality Control of the Interior Body Parts Used in Automotive Industry
Authors: Orzan Iulian , Buzatu Constantin
Published: October 2014

Changing the design with each car line launched, the automotive industry must always adapt as quickly as possible to the needs of the customer and find new and efficient methods to verify the quality in time and in costs. In the case of the interior body parts the quality control is always a quest, because the parts must be verified with a control system that is simulating the exact position in the car. This paper presents a normalization of how this control system should be designed and build in order to verify the quality of the interior body parts.
Influence of Production Flow Management Methods on an Assembly Line Supplied on Stock
Authors: Rotaru Ana , Gavriluţă Alin , Niţu Eduard
Published: October 2014

The present paper is a continuation of a larger study of the authors, which consists of an analysis on the performances of several production systems. In this paper it is analyzed the influences of the method of managing the flows, the method of production programing and the clients demand on performance indicators of a multiproduct assembly line supplied on stock. The assembly line is designed to produce two types of similar products and is made of 5 workstations with mainly manual activities, which are supplied with parts on a stock based method. The performance indicators chosen for analysis were: average work in process, cost per unit, systems reactivity to client demand and throughput. The values of these indicators were obtained by simulating the assembly lines functioning in different experimental conditions, determined of the variation of above mentioned variables, by using ARENA software. The obtained results were interpreted and structured, in a manner to help the process managers to take adequate decisions considering the wanted objectives.
Control of Crack Propagation in Composite Fiberglass-Polyester Laminates Using Nitinol Wire
Authors: Alebrahim Reza , Iqram M. , Farizal M. , Singh S.S.K. , Haris S.M. , Elwaleed A.K. , Nikabdullah N.
Published: October 2014

The experimental analysis presents the control of cracked composite fiberglass-polyester by using reinforced Shape Memory Alloy (SMA). SMA wires were used to control and close the crack gap in the composite. The experimental analysis was conducted for one and two SMA wires, whereby these SMA wires were heat treated and trained before being embedded into the fiberglass matrix strip. The composite reinforced strips were pre-notched as a criterion for crack initiation and propagation under gradual tensile loading. It was observed, a complete separation into two pieces of the strip was hindered by the existence of the SMA wires. The control of cracked composite is based on the changing of resistance of the SMA wire during the deformation phase. The variation of the resistance in the stretched SMA wire acts as a feedback to the on-off controller. It was observed during the experimental analysis that when the electric current of 2 Amps is switched on, the wires temperature will be increased until 60°C to produce a contraction effect, hence this effect will close the cracks that occurred under loading condition.