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Recent 3

Vol. 2 (2001), No. 1 (3), March 2001

CONTENTS

  • In memoriam

Prof.dr.doc.ing. Gligor RUSAN

  • Vasile BEJAN

Viitorul revistei RECENT - un viitor asumat

  • Mihai Constantin ARMAŞU

The magneto-abrasive processing - a modern superfinishing process

  • Vasile BEJAN, Rocsin BEJAN

Management + Communication + Continuity = Success

  • Romeo CIOARĂ, Ion TUREAC, Vladimir MĂRĂSCU-KLEIN, Ruxandra CIOARĂ

Constructive and technological new solutions for obtaining single row radial ball bearings cages

  • Aurel COSTEA

Flexibility of technological systems by developing modular construction of manufacturing equipments

  • Ioan CRISTIAN

Mechano-hydraulic compensation networks for symmetrical hydraulic actuators

  • Petru CRUCIAT

The change gears and the assembly of the ratios in the proximity of an admissible value

  • Ion DINESCU, Marian PEARSICĂ

Experimental researches about obtaining of some parameters from the laser processing of the metals

  • Ovidiu FILIP

The influence gap transducer conditions upon the electrical erosion processing

  • Anca FORIŞ

A possible methodology for the ergonomic man – machine relation research

  • Cătălin GHEORGHE

Relationship between price and cost based on value analyse

  • Mihai IONESCU

Sequence logic modules, for pneumatically sequential cycles

  • Petru MĂNIUŢ, Gheorghe BONCOI, Cătălin CHIVU

Automatic control systems of ECM machines working gap

  • Vladimir MĂRĂSCU-KLEIN, Mircea DUMITRU

Database for steels

  • Ion NEAGOE

Researches about material stability leakage during the spinning of cones

  • Maria POPESCU, Ion TUREAC

The tackle of the life cycle of the products in the view of durable development

  • Angela REPANOVICI

Electromagnetic device for drive by vibrations

  • Horia TÂRZIU

Geometrical aspects of relief grinding of tools for conical curved toothing

  • Roberto TEMUR, Flavius SÂRBU

Efficient designing for ECM tool-electrode


Mihai Constantin ARMAŞU

THE MAGNETO-ABRASIVE PROCESSING - A MODERN SUPERFINISHING PROCESS

» Abstract. In this paper the author studies the phenomena that appear during the magneto-abrasive finishing processing. The magneto-abrasive process is a relatively new one and it is boarded between the classical processes and the unconventional ones.


Vasile BEJAN, Rocsin BEJAN

MANAGEMENT + COMMUNICATION + CONTINUITY = SUCCESS

» Abstract. The work shows a point of view of the writer considering the importance of the engineer profession. It is express a point of view about the needs of communication and continuation between generations.


Romeo CIOARĂ, Ion TUREAC, Vladimir MĂRĂSCU-KLEIN, Ruxandra CIOARĂ

CONSTRUCTIVE AND TECHNOLOGICAL NEW SOLUTIONS FOR OBTAINING SINGLE ROW RADIAL BALL BEARINGS CAGES

» Abstract. Especially for large-scale productions, even small decrease of material consumptions can have significant results. Such researches claim creativity and are in concordance with durable development concept. The paper presents results of studies oriented towards the decrease of material consumptions for single row radial ball bearings cages. Two groups of solutions are approached. One of them suggests only technological changes and is based on a mathematical model specially conceived. The second one suggests for cages new constructive solutions. These are patented or now being patented.


Aurel COSTEA

FLEXIBILITY OF TECHNOLOGICAL SYSTEMS BY DEVELOPING MODULAR CONSTRUCTION OF MANUFACTURING EQUIPMENTS

» Abstract. The paper presents some results of one long time research and of one rich experience about construction of devices with modular structure.


Ioan CRISTIAN

MECHANO-HYDRAULIC COMPENSATION NETWORKS FOR SYMMETRICAL HYDRAULIC ACTUATORS

» Abstract. The paper presents mathematical models of the principal mechano-hydraulic compensation networks of the symmetrical hydraulic actuators dynamics. The behavior as pass-upward filter of the hydraulic actuators mechanic-hydraulic compensation networks of is highlighted. In the end the mathematical model of the compensated hydraulic actuator is deduced and its dynamic behavior is displayed by numerical simulation.


Petru CRUCIAT

THE CHANGE GEARS AND THE ASSEMBLY OF THE RATIOS IN THE PROXIMITY OF AN ADMISSIBLE VALUE

» Abstract. The handbooks of machine-tools present the structure and the kinematics linkages necessary to obtain the generatrix of the generating milling cutter toothing. The variant without differential gear is eliminated because of the difficulties to obtain the precision for the slope of the screw gears.


Ion DINESCU, Marian PEARSICĂ

EXPERIMENTAL RESEARCHES ABOUT OBTAINING OF SOME PARAMETERS FROM THE LASER PROCESSING OF THE METALS

» Abstract. The processing of a metal material using a laser beam assisted by an active gas spray is consisted in bringing the material in the area of its interaction with the focused laser beam. The high electromagnetic energy is transferred into the crystal lattice of the material, releasing a calorific energy in small volumes and in short periods of time. In the paper are presented the researches and experimental results with the respect to the determination of some technological parameters of the laser beam processing of some metallic materials. There are also shown the structural changes that appear during the processing.


Ovidiu FILIP

THE INFLUENCE GAP TRANSDUCER CONDITIONS UPON THE ELECTRICAL EROSION PROCESSING

» Abstract. The gap transducer conditions have a very important role in electrical erosion processing; because they are the elements through witch the processing is optimized. This paper presents the gap transducer conditions, their dependence on the distance between the electrodes and it is given emphasis to some observations upon the use of these conditions during electrical erosion processing.


Anca FORIŞ

A POSSIBLE METHODOLOGY FOR THE ERGONOMIC MAN – MACHINE RELATION RESEARCH

» Abstract. During the last years, the specialists in production management have forgotten the ergonomic principles for work processes optimization, based on the energy consumption economy. This can be a very easy and also chipper method for increasing work productivity and simultaneously with the other production indicators. The paper presents a possible research methodology, an original one, of work systems study from the ergonomic point of view. The main objective that can be attend by applying this methodology is to find a equilibrate man – machine relation (in industry) and to increase the economic indicators for the production characterization. In the end of the paper is demonstrating the feasibility of the proposed method, by the results of the ergonomic optimization of the man - pressing machine system.


Cătălin GHEORGHE

RELATIONSHIP BETWEEN PRICE AND COST BASED ON VALUE ANALYSE

» Abstract. The distance between production full cost and the estimated price is not retrieve in the field of value analysis method. The paper presents the necessity reconsidering the objective and method of value analysis.


Mihai IONESCU

SEQUENCE LOGIC MODULES, FOR PNEUMATICALLY SEQUENTIAL CYCLES

» Abstract. The authors of the inventor certificate provide the specialists in the field of sequential pneumatic commands a new method and system, which have the following characteristics: they solve any sequential cycle of pneumatic command; high reliability; easy maintenance and fast repairing; easiness in introducing the additional conditions and afterwards changes; insensitivity to perturbations, satisfying all the practical demands of pneumatic automation.


Petru MĂNIUŢ, Gheorghe BONCOI, Cătălin CHIVU

AUTOMATIC CONTROL SYSTEMS OF ECM MACHINES WORKING GAP

» Abstract. The paper presents the structure, structural block-diagram and the mathematical model of the automatic control subsystem of working gap obtained to a simple three-dimensional profiling. The paper starts with the structure of an original system the electrochemical processing machines driving using hydrodynamic unpassivation.


Vladimir MĂRĂSCU-KLEIN, Mircea DUMITRU

DATABASE FOR STEELS

» Abstract. The work presents a database with industrial materials in general, and with steels especially. First, there are presented some general aspects concerning the relational databases. Next, there is the structure presented, the interface with the user, the main objects that compose the interface window of the database with steels.


Ion NEAGOE

RESEARCHES ABOUT MATERIAL STABILITY LEAKAGE DURING THE SPINNING OF CONES

» Abstract. In the first part of the paper is presented the stability condition determined using an analytical method. In the second part, are shown some results, obtained from experimental research, concerning the establishment of deformation coefficient limit value for which appears the material stability loss in spinning.


Maria POPESCU, Ion TUREAC

THE TACKLE OF THE LIFE CYCLE OF THE PRODUCTS IN THE VIEW OF DURABLE DEVELOPMENT

» Abstract. The paper is concentrated upon the life cycle of the products and points out the changes that appeared in the last decades in tackling of this managerial tool: the evolution from the traditional estimation of the products value to the utilization value (the value across the time, determined by taking into consideration of all type of costs, monetary and unmonetary, during all life time). Problem of modern company, the product use optimisation supposes: a performing management, innovation orientated through utilization and changing the people mentality.


Angela REPANOVICI

ELECTROMAGNETIC DEVICE FOR DRIVE BY VIBRATIONS

» Abstract. The paper presents an original electromagnetic device for drive by vibrations, patented in Romania. This device is executed and tested at the Transilvania University of Brasov, and can have various applications.


Horia TÂRZIU

GEOMETRICAL ASPECTS OF RELIEF GRINDING OF TOOLS FOR CONICAL CURVED TOOTHING

» Abstract. The paper presents an original method for relief grinding of tools for conical curved toothing, in relation with an original device patented in Romania.


Roberto TEMUR, Flavius SÂRBU

» Abstract. The cost of manufacturing the electrode for ECM machines can represent more than 50% of the total machining cost. RP is a technique, which allow shorter product development lead times and reduced manufacturing costs.


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