1. COMPLEX BINDERS SYSTEMS BASED ON MINERALOGICAL
HIGH REFRACTORY COMPOUNDS/ Nicolae ANGELESCU, Sofine AMZIANE, Cristina
IONITA, pp. 7-10.
Abstract. This paper aims to present the
achieving a complex binder systems with high mineralogical refractory
compounds. For achieving this purpose there were sintered two types
of alumina cements based on CA2 and CA6, compounds with the highest
refractoriness from the Al2O3-CaO system.
2. METAL-CERAMIC COMPOZITES/ Nicolae ANGELESCU,
Ioana ION, pp. 11-14.
Abstract. Cermets belong to the
composites structurally integrated, obtained from a metal or alloy
(respectively from more alloys or metals) and one or more ceramic
phases. The compound ratio (metal and ceramic) may vary a lot, and
the cermet process runs at high temperatures, in a protection antioxidant
3. SYNTHESIS AND CHARACTERIZATION OF HYDROXYAPATITE OBTAINED IN
DIFFERENT EXPERIMENTAL CONDITIONS/ Nicolae ANGELESCU, Dan UNGUREANU,
Violeta ANGHELINA, pp. 15-18.
Abstract. In this paper we present a synthesis method for
obtaining hydroxyapatite nanopowders by chemical precipitation.
As the starting reagents, analytical grade Ca(OH)2, H3PO4 and NH4OH
were used. In order to study the factors that have an important
influence on the chemical precipitation process a experimental platform
has been designed for hydroxyapatite synthesis. The experimental
platform was designed and developed in order to study the factors
involved in chemical precipitation reactions of hydroxyapatite such
as synthesis temperature, stirring speed, acid addition rate, aging
time of precipitates etc. The proposed method led to obtaining a
hydroxyapatite with a high degree of crystallinity. In order to
investigate phase composition, crystallinity and crystallite size,
the thermal treated powder samples has been characterized by X-
4. STUDY ON ELEMENTALS ANALYSIS PERFORMANCES OF NAA TECHNIQUES ON
AISI 316L STEELS/ Florina Violeta ANGHELINA, Elena STOIAN , Veronica
DUMITRESCU, pp. 19-21.
Abstract: Knowing the exact chemical composition of a metallic
biocompatible material is a major requirement for estimating the
behavior of implant inside human body. In this direction the conformity
requirements for biocompatible steels AISI 316L are specified in
the SR ISO 5832-1 standard. This paper aims to provide information
on capabilities of complementary techniques like NAA (Neutron Activation
Analysis) for determining of a extended number of elements in AISI
5. ESTIMATES OF UNCERTAINTY IN OPTICAL EMISSION SPECTROMETRIC METHOD
WITH ARC AND SPARKS EXCITEMENT (SEOASE)/ Florina Violeta ANGHELINA,
Vasile BRATU, Ileana Nicoleta POPESCU, Dan UNGUREANU, pp. 22-26.
Abstract: The practice of technologically advanced countries
and economic default and the current rules of the European Union
(EU), all measurements have undergone a significant process of standards
to ensure quality undisputed of the test results. In the spectrometric
field there are standards of competence of laboratories, as well
as of analytical method. SR EN ISO / IEC 17025, EN 13005 and European
standards 04-16 EA, ILAC, etc. 2000. clearly specified scientific
substantiation of the measurand to be modeled properly and to prepare
the budget of uncertainty in knowledge. In this context, to estimate
correctly the measurand spectrometric test is necessary to specify
the current state of theoretical modeling of radiation emission
by atoms. It is clear that attempts spectrochimice are affected
by a relatively large number of influencing factors, which generates
errors and thus contribute to the uncertainty budget method, in
a way difficult to estimate. Accuracy and reliability spectrometric
tests and / or calibrations performed by a laboratory are determined
by many factors. These factors will be estimated and analyzed in
6. ACOUSTICAL DETERMINATIONS ON A COMPOSITE MATERIALS ( EXTRUDED
POLYSTYRENE TYPE/ CORK)/Polidor BRATU, Georgiana Luminita ENACHESCU,
Mihai Catalin ROSCA, Ovidiu VASILE, Radu I. IATAN, pp. 27-32.
Abstract. In this article we
obtained some experimental results of the extruded polystyreneand
and cork. They are absorbtion coefficient, reflection coefficient,
impedance ratio. All these are necessary for extracting some properties
of extruded polystyrene and cork wich are using in auto industry,
plane plates construction etc.
7. IDENTIFICATION OF SOURCES AND NATURE
OF POLLUTANTS SPECIFIC TO SIDERURGICAL PROCESSES GENERATING ENVIRONMENT
IMPACT/ Ilie BUTNARIU, D.FLORESCU, pp. 33-36.
Abstract. The paper presents the principal sources of pollutants
in siderurgic industry, nature of these pollutants and the effects
they produce against environment. This analysis is made by steps
of technological flux specific to each procedure of elaboration
of siderurgic materials.
8. ASPECTS CONCERNING PRODUCTION OF DEFECTS OF SUPERFICIAL FISSURES
TYPE IN CONTINUOUS STEEL CASTING/ Ilie BUTNARIU, pp. 37-39.
Abstract. In this paper, there is shown the mechanical
process for the making of the superficial fissures to the continuous
cast slabs by high strong steels. Also, there is presented the influence
of the structure non-uniformity and chemical steel composition in
the fissures making process. There are presented the principal measures
for the prevention of appearing of the superficial fissures.
9. REALIZATION OF THE MOULDS REINFORCED BY HARD SINTERED ALLOYS
WITH SPECIAL UTILIZATION/ Emilia COMAN (CIOVICA), pp. 40 - 46.
Abstract. The fabrication of assembly mechanisms
is usually based on cold plastic deformation of half-finished steel
products in moulds reinforced by hard sintered alloys. A special
category of moulds are those used in cold plastic deformation of
car pivots and tappets, where the deformation ratio and the products
configuration generate maximum stresses upon deformation tools-resulting
in their premature failure. The paper presents some particularities
of the technology of manufacturing the moulds reinforced by hard
sintered alloys the improved technology results in a perceptible
increase of their reliability.
10. EXPERIMENTAL RESULTS FOR BENDING FATIGUE BEHAVIOUR OF
GLASS-EPOXY COMPOSITE MATERIALS/ Adrian CATANGIU, Alexandru Traian
DUMITRESCU, Dan UNGUREANU, pp. 47-51.
Abstract. The paper presents results obtained by bending
fatigue tests of specimens obtained from composites plates of ortogomal
glass fibers woven and epoxy resin . The samples from plates obtained
by hand lay-up method were tested by using a bending fatigue testing
machine built in university lab. As a degradation parameter was
considered the relative reduction of Young modulus values. The test
results revealed a samples fatigue behaviour better as the proportion
of fiber oriented along with sample longitudinaral direction is
higher. Also from tests results can be pointed out that on the degradation
firsts stages have been observed cracks in samples which have fibers
with orientation different to longitudinal one, cracks which we
consider are related to the inherent defects due to the used fabrication
method for composite plates, too.
11. PERFORMANT INSTALLATIONS FOR DRYING
AND HEATING THE STEEL LADLES/ Dan JILAVU, Valentin RIZEA, Aurel
GABA, pp. 52 - 62.
Abstract. The installations for drying and heating the
ladles are, mainly, installations with vertical setting of the ladle
made up of a burner set on an arm for support and handling and of
an installation for automatic operation of the process. Recently,
a lid was added to this type of installations that is set on the
ladle, the exhaust of the burnt gases being made through the room
between the lid and the ladle or through holes in the lid. In order
to recover the energy contained by the gases when exhausted from
the ladle there have been produced recovery burners mounted on the
lid of the ladle, set in vertical position, and installations with
ladles set in horizontal position endowed with heat recovery devices.
The installations for drying and heating the ladles set in horizontal
position present the disadvantage of additional handling when setting
the ladle and after preheating the takeover and the disadvantage
of a not uniform heating. The paper presents an analysis of those
performing solutions and installations for drying and heating the
ladles together with the main technical characteristics. It also
presents the results obtained on an installation for drying and
heating the ladles vertically set at high temperatures, installation
endowed with heat recovery device.
12. THE CONTROLLED ATMOSPHERE INFLUENCE
OVER THE ASPECT OF THE STAINLESS STEEL STRIP Bogdan Alexandru MOISA,
Andrei CHIRAN, Ionut PRICEPUTU, Zorica BACINSCHI, pp. 63 -70.
Abstract. The aim of this paper is to study the controlled
atmosphere influence over the aspect of the stainless steel strip
The use of continuous style, controlled atmosphere bright annealing
furnaces to heat treat stainless steels after cold rolling is becoming
more common as the aerospace and automotive producers increase the
use of stainless steel components on existing designs and explore
new designs. Although much of the metallurgy and thermodynamics
of Iron, Chrome, Nickel and their compounds are well understood,
a review of the application of the fundamentals to the current practices
and equipment technology can help with improved product quality,
expanded applications, and the optimization of costs for a net improvement
13. NEW BIONANOPARTICLES AND THEIR APPLICATION
IN NANOMEDICINE/Daniel MUNTEANU, Rodica-Mariana ION, pp. 71 - 74.
Abstract. Biomedical nanotechnology presents revolutionary
opportunities in the field against many diseases such as cancer,
neurodegenerative diseases, as well as detecting microorganisms
and viruses associated with infections. There has been enormous
interest in the field of preparation of nanostructured advanced
materials by physical methods have become an important branch of
high technological materials. In this paper the use of nanocomposites
of inorganic materials in organic matrices or photosensitizer-stabilised
gold or silver nanoparticles for photodynamic therapy of cancer,
is presented. A combination between typical properties of organic
polymers (specific absorption of light) with the advantages of nanoparticles,
particularly the high specific surface and the high ratio of surface
atoms to inner sphere atoms, is discussed. For both types of nanoparticles,
gold and silver, the changed topography of the film surface after
deposition is caused by a local material transport and a material
separation between formed particles (probably AgNO3) and the embedding
polymer matrix. It is assumed that small particles of Ag are formed
by a thermal redox process between Ag+ and the polymer. The structure
of the prepared hybride nanocomposites by means of X-ray diffraction,
IR, XRD, XRF and optical spectroscopy, etc. will be evaluated.
14. SOLUTIONS AND MODERNIZATION OF HEATING
FURNACE INDUSTRY STEEL MATERIALS/Dorian MUSAT, Aurel GABA, Vasile
BRATU, Marian IONESCU, Mihai UDRISTE, Ionel DOBRE, pp. 75 - 82.
Abstract. This paper presents various solutions used in
upgrading the heating furnace and results in reducing specific fuel
consumption, reduce emissions pollutant increase technological performance.
Also, modernization solutions are applied to a furnace forges metal
materials industry, the conditions tn it will work for the achievement
of thermal processes:
- use ceramic fiber;
- the use of advanced pulse burning;
- a facility use automation to meet the technological requirements
and environmental energy, provided with a PC.
To forge furnace in the two cases analyzed, modernized and upgraded
to create a mathematical model for performing energy balances.
The mathematical model developed was implemented in a Microsoft
Excel program with the author that have been prepared using data
obtained from thermal balance measurements of forging furnace before
and after modernization. By comparing data from the program emphasizes
increasing energy and technological performances of forging furnace
under study after modernization.
The experimental results obtained in the operation of this oven
upgraded without running the air preheater, are presented in the
paper, along with overviews of the cabinet and the various installation
15. THE EFFECT OF WEAR TEST PARAMETERS
ON TRIBOLOGICAL CHARACTERISTICS OF ALUMINUM BASED COMPOSITES/ Ileana
Nicoleta POPESCU,Vasile BRATU, Florina Violeta ANGHELINA, Lucica-Grigora
TOMA, pp. 83-86.
Abstract. In this paper we examined
the effect of contact pressure (applied load) and relative speed
in braking points on the coefficient of friction and wear of aluminum
composites, sintered at 620°C for one hour in hydrogen atmosphere
and after that solution treated at 515±5o C for 6 hours,
quenched in water and artificial aging at 170° C for respectively
8 and 4 hours. The obtained values of tribological characteristics
for studied composites (Al-4Cu/10% and Al-4Cu/15% SiC )compared
with Al-4Cu alloy material and with another import sintered friction
material, tested under the same conditions, shows that if the applied
load increases, wear increases for all materials and friction coefficient
decreases. It is noted that we obtained the lowest wear for Al-4Cu/10%
SiC material, tested with a load of 0.35 MPa at a speed of 3.8 m/s,
and the highest values of wear we are recorded for unreinforced
aluminum alloy. The measured fiction coefficient values are in the
range of 0.4-0.5 for composite materials and the same friction coefficient
values for the imported material and for unreiinforced aluminum
alloy has a tendency of gripping.
16. DELTA FERRITE INFLUENCE IN AISI 321
STAINLESS STEEL WELDED TUBES/ Ionut Lucian PRICEPUTU, Bogdan Alexandru
MOISA, Andrei CHIRAN, Georgian NICOLESCU, Zorica BACINSCHI, pp.
87 - 90.
Abstract. Usually a percentage over 2.5% of delta-ferrite
is contained in AISI 321 stainless steel which leads to better workability
(welding procedures). However a percentage like 10 % of delta ferrite
or more can be harmful to the welded area due to the transformation
of ferrite to sigma phase (which is a specific transformation of
the steel alloyed with chromium). The best way to predict de content
of delta ferrite in austenitic stainless steel is Schaeffler-DeLong
17. EXPERIMENTAL RESULTS OF THE USAGE OF
AN OXY-FUEL BURNER AT ELECTRICAL ARC FURNACES /Valentin RIZEA, Dan
JILAVU, Aurel GABA, pp. 91-96.
Abstract. Electric arc furnaces
had, after the energy crisis emerged, a remarkable development in
metallic materials industry. Among the procedures developed, with
a major contribution in reducing the specific consumption of electricity,
there is also the usage of the oxy-fuel burners. This paper presents
advanced solutions and oxy-fuel combustion systems, used worldwide
in electric arc furnaces. In the paper there are also described
the combustion plants with liquid and gaseous fuels, mounted in
the lid and on the electric arc furnace door, along with the main
technical characteristics and results obtained experimentally. It
also presents results obtained experimentally on an electric arc
furnace equipped with an oxy-fuel burner.
18. TEMPERATURE BEHAVIOR OF LAMINATED COMPOSITE
MATERIALS CONTAINING TEXTILE WASTE /Iuliana STAMATE, pp. 97-100.
Abstract. Composite materials
are new materials class, which is growing rapidly due to their special
properties and so because of their use. Following the technological
process in the textile industry, resulting more waste, in order
to capitalize on their part, are made of composite laminates containing
textile waste. This paper represents the starting point for the
study of the temperature behavior of these composite materials laminated.
19. ASSESSING THE TOTAL PHENOLICS OF ROMANIAN
WINE VARIETIES/ Rusandica STOICA , Rodica-Mariana ION, Ioana-Raluca
BUNGHEZ, Raluca SENIN, Irina Gentiana BAJENARU, pp. 101-103.
Abstract. Phenolic compound
are ubiquitous constituents of higher plants found in the wide range
of commonly consumed plants foods such as fruits, vegetables, cereals
and legumes, and in beverages of plant origins, such as wine, tea
and coffee (Stoica R., ). Phenolics are a large and complex group
of compounds of a particular importance to the characteristics and
quality of red wine. They are also significant in white wines but
occur in much lower concentration. These compounds can affect the
appearance, taste, mouth-feel, fragrance, and antimicrobial properties
of wine. (Jackson R. J., ). Phenolics in grapes and wine include
many different substances: phenolic acids, flavonoids, proanthocyanidins
and polymeric condensed tannins (Waterhouse A.L., ). Measuring
these different analytes and reporting meaningful value in a single
number it is an analytical challenge.
In this paper is described the total phenolics assessment using
Folin-Ciocalteau method widely applied for the analysis of the total
phenolics in wine. A global assessment of the total phenolic content
of some Romanian wines was achieved.
20. METHODS FOR PREVENTING THE ELECTROCHEMICAL
CORROSION ON A REFRIGERATOR COOLING SYSTEM/ Valentin-Cristian TOGAN,
Gheorghe IONITA, pp.104-109.
Abstract. The degradation of
the metallic surface is a phenomenon that has been studied on the
basis of the many experimental observations, in order to prevent
or slow the destruction of the parts or equipments. Therefore, preventing
the electrochemical corrosion occurrence on the refrigerators cooling
system, helps to reduce the service call rate. On the other hand
in the last year, the quality of the products is the most important
aspect that every company tried to improve by reducing the service
21. THE MOLDFLOW ANALYSE OF THE INJECTION
PARTS, AND THE IMPROVEMENT OF THE INJECTION PROCESS/Valentin-Cristian
TOGAN, Gheorghe IONITA, pp. 110-114.
Abstract. Processing by injection
is the largest industrial way to obtain plastic parts. An analyzing
accuracy of the injected part execution, improving the quality of
the injection process and of course the quality of geometrical execution
parts and injection process, has been performed with the new 3D
simulation program Autodesk Moldflow Insight.
22. SYNTHESIS, CHARACTERIZATION AND IN
VITRO BIOACTIVITY OF SiO2 – CaO – P2O5 SOL – GEL
GLASSES HIGHLIGHTED BY XRD TECHNIQUE/ Dan N. UNGUREANU, Nicolae
ANGELESCU, D. AVRAM, Adrian CATANGIU, Vasile BRATU, Elena V. STOIAN
Abstract. Synthesis of bioactive glasses can be
achieved by two major methods: traditional fabrication by melt –
casting and sol – gel process. Bioactive glasses obtained
by sol–gel process generally reveal a high bioactivity than
melt derived glasses of similar compositions.A common feature of
this materials is the modification of their surface reactivity immediately
after soaking in simulated body fluids. On the glass surface a layer
of carbonated hydroxyapatite, biologically active, is formed. In
this paper, bioactive glasses based on SiO2-CaO-P2O5 system have
been synthesized by sol – gel process. The powder glass obtained
has been characterized by X-ray diffraction, X-ray fluorescence
spectroscopy (XRF). In vitro study reveals formation of apatite
layer at surface of powder glass, after 3 days of soaking in simulated
B. MECHANICAL ENGINEERING
Abstract. During the grinding process are generated
a lot of vibro-acoustical emissions. The monitoring of these emissions
is necessary for the optimization, control and keeping of the process
in allowable limits. A method and an apparatus were developed for
monitoring of the grinding process components: acoustic emission
generated during cutting process by the contact abrasive wheel –
part; vibrations generated in the abrasive wheel shaft by the unbalancing
of the abrasive wheel; geometry of the part processed; geometry
of the abrasive wheel.
2. MECHATRONIC SYSTEM FOR PNEUMATIC ACTUATION,
USING AS EXECUTION ELEMENT, AN ARTIFICIAL MUSCLE AND FOR CONTROL
LOOP, USING A CAMERA/Mihai Ardeleanu, Adriana Carstoiu, Simona Mihai,
Abstract. In this paper it was
conceived a system to control supplementary the accidental situations
that may occur during operation of the mechatronic device with pneumatic
muscles, for precise actuation loads. The system developed includes
the technical work with image processing, in the static case. An
interactive program is designed bellows gauge functional check for
artificial muscle, checking frame by frame the pixel’s attributes
arrays of compared, in comparison with the maximal state matrix.
The system has the capacity to respond by sending a digital message
encoded by a superior computer system.
3. SUPERVISER MECHATRONIC SYSTEM, BY IMAGE
PROCESSING, FOR AIR FLOWS CIRCULATING THROUGH THE ARTIFICIAL MUSCLE
IN A MECHATRONIC DEVICE /Mihai ARDELEANU, Adriana CARSTOIU, Simona
MIHAI, pp.131 – 132.
Abstract. Through this paper
the authors propose an image processing system which, through a
dynamic approach, check the flow values derived by calculation,
compared with some maximum values imposed. The system warns via
digital code, transmitted by a superior level computer which it
is notified of the achievement of improper working parameters. Conception
of system is presented in a comprehensive graphical format, with
the map of the main details.
4. DETECTING THE ORIGINS OF SOME FAILURES
OF MECHATRONIC DEVICES AND SYSTEMS BY NON-CONTACT, FULL-FIELD LASER
SPECKLE INTERFEROMETRY/D. N. Borza, I. T. Nistea, pp. 133-142.
Abstract. Embedded electronics
are exposed to harsh working conditions. They are exposed to high
levels of stress having both thermal and mechanical external origins,
often coupled. These stressing sources may directly create reliability
problems, but they may also increase the effects of other factors,
such as humidity, chemical or electrical ones. The experimental
analysis of such phenomena may be of great help in discovering the
origins of similar failures and in developping a correct numerical
model which allows further simulations and establishing credible
failure scenarios. The objective of this paper is to present the
practical application of a full-field, non-contact optical technique
– the out-of-plane speckle interferometry – in finding
the physical origins of some failures occurring in an assembled
embedded board. The failures appear as solder joint shear in presence
of thermo-mechanical stressing. The authors applied a multi-level
experimental methodology allowing to obtain the out-of-plane deformation
cartography and finally explain the possible root origins of the
failures. The test methodology is able to provide an insight into
the physics-of-failure. The interferometric sensitivity allows using
very small thermal stress, so that they are not inducing any harm
to the tested product. The results may further be compared to those
of a numerical model.
5. OPEN ARCHITECTURE EQUIPMENT FOR A HIGH
PRECISION MEASUREMENT AND THREE-DIMENSIONAL MODELING OF THE FREE
FORM SURFACES/ D. Cioboata, A. Abalaru, C.Logofatu, F.Traistaru,
D. Stanciu, Marin Cornel, pp. 143-149.
Abstract. With quality control
being an important issue in industry, there is a great need for
free form surfaces measurements in manufacturing. With manufacturing
processes becoming increasingly more flexible, there is also a demand
for increasing flexibility of measuring machines. This paper describes
the process of developing an automatic measurement system for any
free-form surfaces. We present a system for 3D surfaces measurement
with three inter-changeable measurement heads which can be easy
mounted on its Z axis and allow contact or non-contact measurements.
The paper presents also some considerations about error sources
and system calibration. This system is developed under the project:
„Researches on advanced control techniques based on the analysis
of errors and three-dimensional modeling for a high precision measurement
of the complex surfaces”funded by National Program Partnerships
in Priority Areas.
6. STUDY OF SELECTIVE LASER SINTERING – A QUALITATIVE AND
OBJECTIVEAPPROACH/Veronica Despa, Gheorghe I. Gheorghe, pp. 150-155.
Abstract. This paper makes a
synthetic overview of the process of selective laser sintering (SLS).
At first, the SLS process was experimented performed mainly on polymers
and nylon to create prototypes for audio-visual help and fit-to-form
tests. Gradually, the SLS process has unfolded and expanded including
metals and alloys to manufacture functional prototypes and develop
rapid tooling. Subsequently, computational modeling has been used
for the computer management of the SLS process, optimize the process
parameters and enhance the efficiency and dialogue between the sintering
machine - operator.
7. INJECTION MOULDING SIMULATION OF POLYMER
STRUCTURES MODELED WITH FINITE ELEMENT /I.DURBACA, A.C. DURBACA,
Abstract. The paper presents
the results of finite element and computer-aided simulation of injection
molding process for some polymer material parts (footwear soles)
in order to establish the profiles of injection rate, pressure,
temperature gradient for the polymer melt in the mould cavity and
distributing channels, analyze the clamping pressure during the
injection, and select the best injection point in the mold cavity
to avoid incomplete filling, shorter injection time per cycle etc.
8. EXPERIMENTAL STUDIES REGARDING THE BEHAVIOR
OF A MECHANICAL SYSTEM WITH PNEUMATIC MUSCLE DRIVEN BY COMPRESSED
AIR / Andreea IANCU, Viviana FILIP, pp. 160 -167.
Abstract. The objective of the
paper is modeling the behavior of experimental pneumatic muscle
wich performs a translational motion, using a bench with low pneumatic
pressure . It will be determinated in FluidLab, the value of the
force developed by the pneumatic muscle, taking account of the pressure
load, the muscle is modeled in SolidWorks and simulated the behavior,
depending on the texture turns and the material it is made, the
virtual model is made in the experimental stand MatLab Simulink
and set new directions for research.
9. RESEARCH WORK AND STUDY ON ULTRAPRECISE
HIGH-TECH ROBOTIC MICRO-NANO-SYSTEMS FOR MEASUREMENT, POSITIONING
AND ALIGNMENT USED IN THE FIELDS OF MECHATRONICS AND INTEGRONICS/
Simona ISTRITEANU ,Gheorghe Ion GHEORGHE, pp.168-175.
Abstract. The scientific paper
presents a structural, functional and performance study on a wide
range of ultra high-tech robotic micro-nano-systems for measurement,
positioning and alignment to optimize constructive solutions for
applications in the field of Mechatronics and Integronics for technical,
technological, industrial and precision nanoscale metrology processes.
10. FUNCTIONAL OPTIMIZATION OF THE EXPERIMENTAL
RESEARCH STAND IN ORDER TO OBTAIN REACTIVE MIXTURES /Andreea KUFNER,
Mircea VLADESCU, Alexis NEGREA, pp.176 -180.
Abstract. The objective of this
paper is to functionally optimize the experimental research stand
in order to obtain reactive mixtures by changing the shape of the
stirred tank reactor. The initial stand had a parallelepiped recipient
which had the disadvantage of producing residual currents in the
four corners of the reactor, having a negative influence over the
intensity of the mixing process. In this paper there has been designed
another reactor body, of cylindrical shape and bottom with section
shape as a "basket handle'', which beside the fact that eliminates
the above-mentioned inconvenient, it allows an increased efficiency
of the mixing process, by eliminating the „dead” spaces
and by optimally passing between the tank’s bottom and the
lateral cylindrical part.
11. FINITE ELEMENT METHOD USED IN STRAIN
AND STRESSES STUDY FROM ACTIVE PLATE OF PUNCHING USED FOR CUTTING
OF MEDICAL DEVICES /Cornel MARIN, Gheorghe VASILE, pp. 181-187.
Abstract. Permanent innovations
in medical devices manufacturing technologies has as purpose to
low their prices and improve the quality and efficiency of medical
care. Shaped knives used for cut medical devices as polyurethane
compresses are active elements in various forms and are part of
automatic and semiautomatic punches. These stamps have a high price
because of non-conventional processes used to manufacture them,
and limited lifetime due to active wear of the edges is mainly due
to uneven distortions arising from the application of these active
elements. This paper work presents some theoretical and experimental
research on deformation and stresses calculation of active plate
of stamps 100 ? 100 mm, for a set of loading and border conditions.
12. STAND FOR LOW PRESSURE ACTUATORS. EXPERIMENTAL
STUDY ON ARTIFICIAL MUSCLE, Simona MIHAI , Viviana FILIP, pp. 188
Abstract. The purpose of this paper is the presentation
of the experimental pneumatic stand in the laboratory and the experimental
study of the pneumatic muscle behavior, as part of the stand, using
FluidLab. The pneumatic muscle movement depending on the pressure
supplied will be analysed and its modeling and simulation will be
performed in SolidWorks.
13. NUMERICAL METHOD USED TO ANALYZE ZERO-ORDER
AND THE FIRST ORDER KINEMATICS OF THE SWINGING-FORK MECHANISM/ Vladimir
Dragos Tataru, pp. 198 – 201.
Abstract. The paper presents a
numerical method for kinematics analysis of zero order and first
order of the swinging fork mechanism. For this purpose we first
determine the differential equations describing the movement of
the mechanism. These equations are written in the matrix form. Then,
the system of differential equations obtained is solved using numerical
Abstract. The paper presents a numerical method for
kinematics analysis of zero order and first order of the cardanic
transmission. For this purpose we first determine the differential
equations describing the movement of the mechanism. These equations
are written in the matrix form. Then, the system of differential equations
obtained is solved using numerical integration methods.
14. NUMERICAL METHOD USED TO ANALYZE ZERO-ORDER AND THE FIRST ORDER
KINEMATICS OF THE CARDANIC TRANSMISSION/ Vladimir Dragos Tataru,
pp. 202 – 205.
15. WHY 3D ROUGHNESS?/ Florian Traistaru,
Danut Stanciu, Daniela Cioboata, pp. 206 – 211.
Abstract. The paper study intends
to answer the following questions:
-Is 3D roughness a necessity or just a caprice of the researchers?
-There are only advantages when choosing to use 3D roughness?
-When, where and why to use 3D roughness?
It shows the maine differences between the two most important methods
of measuring the roughness (2D &3D) and a system for measuring
the 3D roughness using confocal microscopy and a high precision
X-Y coordinate table.
16. CONSTRUCTION OF COMPLEX 3D SHAPES WITH
SUPERELLIPSOIDS AND SUPER CYLINDERS/ Stefan TALU, Mihai TALU, pp.
212 – 215.
Abstract. This paper presents
a CAD study for generating of complex shapes with superellipsoids
and super cylinders based on computational geometry. The Madsie
Freestyle 1.5.3 application for computation helps in obtaining conclusions
referring to shape and profile for different 3D complex objects,
but also facilitate the design of new 3D models. Results from this
study are applied in geometric constructions and computer aided
design used in engineering and sculpture design.
17. COMPLEX 3D SHAPES WITH SUPERELLIPSOIDS
AND SUPER CONES/ Stefan TALU, Mihai TALU, pp. 216 – 219.
Abstract. The purpose of this paper is to present
the results of a CAD study for generating of complex 3D shapes with
superellipsoids and super cones based on computational geometry. To
obtain the relevant geometric informations concerning the shape for
different 3D complex objects the Madsie Freestyle 1.5.3 application
for computation was used. The results of these study can be used in
complex geometric constructions and optimized CAD structures used
in engineering and sculpture design.
18. ANALYSIS OF HEAT EXCHANGER EFFICIENCY
FOR AN ELECTRIC POWER TRANSFORMER/ Stefan TALU, Mihai TALU, pp.
Abstract. The objective of this
paper is to analyse through the Finite Elements Method (FEM) the
efficiency of heat exchanger with forced cooling circuit by type
oil-air RTCF 200 kW for electric power transformers. The Finite
Elements Analysis was performed using SolidWorks 3D CAD Design and
FLUENT 6.3.26 Software. A 3D model of the studied geometry was generated
based on the designed data. The FEM results were compared with the
results of tests carried experimentally. The obtained results offer
important information for economical design of the power transformers
to reduce the cost of manufacturing transformers.
19. MODELLING OF THERMAL PROCESSES OF A
HYDRAULIC COOLING SYSTEM FOR A POWER TRANSFORMER/ Stefan TALU, Mihai
TALU, pp. 224 -227.
Abstract. This paper describes
the Finite Elements Analysis of the hydraulic cooling system for
electric power transformer by type TTU 630 kVA 20/0.4 kV. The Finite
Elements Analysis was performed using SolidWorks 3D CAD Design and
COSMOSFlow Works 2008 Software based on the designed data. Results
from Finite Elements Analysis and experimental tests were compared.
The obtained results offer useful information for optimal design
of the electric power transformers to improve transformer efficiency,
safety, reliability and to reduce manufacturing costs.
20. SEMIAUTOMATIC EQUIPMENT FOR MANUFACTURE
OF POLYURETHANE DRESSINGS WITH ADHESIVE BORDERS UDED IN WOUND TREATMENT/
Gheorghe Vasile, Cornel Marin, pp. 228 -231.
Abstract. Present technologies
for current medical devices are one of the most innovative industries
in the world. These devices improve and daily saves thousands of
lives. Continuously innovations in medical devices manufacturing
technologies have as result lowering of their prices and improved
quality and efficiency of medical care. This study presents original
equipment used in the manufacture of medical devices in the current
context of diversification and specialization of medical devices.