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Vol.21, No. 3-4 (2024)

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Dear colleagues,
There are two important areas regarding implementation of scientif ic and research activities: conducting quality scientific research and 
publishing the results of scientific and professional research, in order  to provide benefits to the scientific research and business community.
Science and all its segments have the essential task of researching life  and aspects necessary for life, i.e. investigating the origin and essence  of phenomena in us and around us, improving the quality of living  and operating, developing the economy and societies as a whole etc.
For the implementation of scientific research processes, human resources and infrastructure potentials are very important, which in continuous,  long-term action, in the environment of clear and supportive strategies,  can only bring good results, new values and a better future. Therefore,  the connection of public management institutions, the academic sector  and business entities is the only true model in which everyone has its  own important role and significance.
Basic research and applied scientific research are, among other forms,  the most important ones, because they reveal causes, mechanisms  and bring solutions to specific life and economic needs. Therefore, it is of particular importance to publish practical research and topics that are embodied in the needs of the public and industrial sectors.

Precisely in connection with the above, the long-standing mission of the journal MAŠINSTVO is to contribute to publishing scientific 
achievements in the field of technology. The direction that MAŠINSTVO wants to follow is to publish quality papers that undergo a manda
tory peer review process, which also achieves another goal: fulfilling the prerequisites for indexing the journal.


In this double issue, the journal MAŠINSTVO offers five papers from different thematic areas. The first paper brings an analysis of the free 
bending process, the second treats the optimization of the hydraulic  cylinder assembly of the prosthesis, the third relates to the applica
tion of the Taguchi method in the analysis of heat transfer processes, the fourth paper relates to the research of the ‘clinching’ process, and 
the fifth paper is related to the research of free vibrations of beam  models.


In order to present scientific research and professional capacities, the  journal follows new trends and practices in multidisciplinary areas.
We kindly invite all esteemed colleagues, especially our young colleagues from all universities and other related institutions, to take 
part and publish their scientific and professional research results in this Journal, which is a significant project of the Faculty of Mechanical Engineering of University in Zenica and provides the opportunity for presentations of scientific research and professional research results from highlighted, and related, thematic areas. The ‘Guidelines for Authors’ section provides basic guidelines for preparing and writing 
papers.
In particular sections, we continue the tradition of presenting scientific, research and economic capacities from the environment.


Sincerely,  
Fuad Hadžikadunić, Editor-in-Chief

Published: 31.12.2024.

Contents

31.12.2024. Professional pappers
ANALYSIS OF THE INFLUENCE OF V-DIE WIDTH ON K-FACTOR DURING AIR BENDING OF THIN SHEETS

Air bending is one of the most common methods of forming positions from  sheet metal. It has found wide use due to the simplicity of the procedure and  the possibility of bending any angle by controlling the movement of the  upper tool (punch). With this procedure, it is possible to create very complex  shapes that can have a la...

By ARNEL JAŠAREVIĆ, IBRAHIM PLANČIĆ

31.12.2024. Professional pappers
DESIGN OF THE HYDRAULIC CYLINDER ASSEMBLY OF AN ABOVE-KNEE PROSTHESIS WITH THE OBJECTIVE OF MASS REDUCTION

The hydraulic cylinders used on the above-knee leg prosthesis must meet  very precise geometric, functional and mass requirements. Such can only  be found abroad, but procurement is complicated and prices are high.  The topic of this paper is the analysis of the possibility of manufacturing  and purchasing such cylinders on the...

By AMEL KARIĆ, REMZO DEDIĆ

31.12.2024. Professional pappers
APPLICATION OF THE TAGUCHI METHOD IN DETERMINING THE EFFICIENCY OF DIFFERENT MATERIALS IN RETAINING HEAT IN A THERMOS BOTTLE

Heat transfer is a key process that occurs in everyday life, whether it  involves maintaining the warmth of the food, or various industrial  processes. This term includes three primary mechanisms of transfer:  conduction, convection, and radiation. To minimize heat loss or retain  coldness, different insulating materials are use...

By AMINA HUREM

31.12.2024. Professional pappers
SELECTION OF THE MINIMUM RADIUS OF THE PUNCH IN THE ‘CLINCHING’ JOINING PROCESS FOR ACHIEVING MINIMUM JOINT STRENGTH FORCE

In today's market, ensuring competitiveness directly depends on changes and improvements in internal production processes. As a ‘better version’ of spot welding, the clinching process was developed. Since there is no specific translation in our terminology, the descriptive term ‘joining by pressure’ is  used. This ...

By BENJAMIN ČUKLE

31.12.2024. Professional pappers
NUMERICAL ANALYSIS OF FREE OSCILLATIONS OF BEAMS

This paper examines the free oscillations of beams, which are essential  for preventing resonance in constructions such as bridges, buildings, and  other engineering structures. The objective of the study is to evaluate the  accuracy of numerical methods by comparing their results with exact  solutions for three support conditio...

By ENA ŠAHINOVIĆ, SAFET ISIĆ, ERMIN HUSAK, SAMIR DIZDAR, EMIR NEZIRIĆ

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