TEHNIČKO-TEHNOLOŠKI I EKONOMSKI POKAZATELJI ...

Abstract
Doctoral dissertation includes several years of research concerning the development of
technological improvement in the maintenance of oneparted railway wheels towed vehicle,
with modern methods of diagnosis and procedure in order to achieve satisfactory levels of
reliability in operation.
Comprehensive research has shown that the introduction of this new technological process
of maintaining of the wreath of monoblock wheels, quality ER7, makes a great
technological importance in improving the maintenance of vital rail vehicle-point in our
own workshop facilities of railway direction. The study also confirmed that, the
implementation of this, an entirely new technological maintenance procedures wreath
monoblock wheel, is applicable and feasible technical and technical process for the existing
workshop facilities to deal with the problem of maintenance of railway vehicles without
significant investment.
Surveys were conducted in stages. First in detail are implemented the theoretical research
achievements, based on the study and application of modern techniques and technologies,
made to maintain the vital elements of railway technical systems. Implementation of this
theoretical study is produced by the realistic sound and comprehensive scientific
foundation, which allowed reasonable access to experimental, and also exploitation
research. This comprehensive scientific research process, resulted a satisfactory scientific
research findings, which for sure will create a sound basis for scientific discussion and also
access to practical use by the railway companies of our country.
The whole process of dissertation research subjects is based on the latest achievements of
scientific knowledge in mechanical engineering studies such as: the technology of metal
processing, steel production technology, metal mechanics, strength of materials, welding
metallurgy, physics, chemistry, etc..
Experimental research and exploitation, were accompanied by modern diagnostic methods
and procedures, merit-making for the adoption of scientific decisions and evidence at the
level of quality and reliability. It is shown that besides the methods of fracture of metals
and mechanics metallurgy standard test methods, the introduction of modern ultrasonic
diagnostic techniques and technologies in the process of diagnosing vital railway vehicle,
as a monoblock points, largely provides a high degree of reliability by providing a
significant contribution to this research for confirming technological feasibility of the
process.
Technological process of wreath restoring of monoblock wheels, quality ER7, which are
subjected to the mechanical process of wear and combinated static and dynamic loads, in
the process od exploitation, it can not be imagined without the use of reliable diagnostic
techniques. Thus, through the more technical phases of extensive research, has been
confirmed and proved the necessity of applying nondestructive diagnostic method based on
the field of ultrasound defectoscopy, with the purpose of confirmation and increasing of
impact on the reliability of technical systems and rail car.
Mr Veljko Vuković
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