Gordana Globocki Lakic

Gordana Globocki Lakic
University of Banja Luka · Faculty of Mechanical Engineering

PhD

About

44
Publications
38,675
Reads
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119
Citations
Additional affiliations
March 2017 - present
University of Banja Luka
Position
  • Professor (Full)
January 2016 - December 2017
University of Banja Luka
Position
  • Coordinator of project bilateral cooperation: B&H and Slovenia for 2016/2017
Description
  • Coordinator of project bilateral cooperation between Bosnia and Herzegovina and Republic Slovenia for 2016/2017, „Possibilities of micro – machining application in tool industry“, No. 19/6-020/964-1/16
January 2016 - March 2017
University of Banja Luka
Position
  • Collaborator on the project „PostBANOROB-extension of BANOROB project-Bosnian-Norwegian research based innovation for development of new, environmental friendly, comtparative robot technology for selected target groups“
Description
  • „PostBANOROB-extension of BANOROB project-Bosnian-Norwegian research based innovation for development of new, environmental friendly, comtparative robot technology for selected target groups“ , 2016.

Publications

Publications (44)
Article
Full-text available
In this paper a typical requirements for the design and construction, workmanship and tests of a gas cylinders of water capacity between 150 l and 3000 l are described. This type of gas cylinder presents a refillable seamless steel tube aimed for transportation of compressed and liquefied gases exposed to extreme world-wide ambient temperatures. Th...
Article
Increasing demand for using renewable energy resources is strongly emphasized during the last decades. On the international level it is recognized through a series of conventions, conclusions and recommendations. Forests are energy source through conversion of wood biomass into solid, fluent and gaseous fuels for industrial and household use. Wood...
Conference Paper
Full-text available
Development of micro-devices parts is intensified with developments in medical device and energetic industry. In production of micro-parts (micro-pump, micro-gears, micro-manipulators, etc.), a wide range of engineering materials is encountered. Strict requirements are set in terms of characteristic of micro-parts machined surfaces, such are low su...
Conference Paper
The paper analyzes the possibilities of processing the hardened steel with carbide tools by applying a special technique for dosing the coolant in cutting zone, the high pressure jet assisted machining (HPJAM). Carbon steel C45E (45 HRc), steel C45E surface hardened at 58 HRc and steel for bearings 100Cr6 (AISI 52100) hardness 62 HRc are analyzed....
Conference Paper
Full-text available
Apstrakt: U radu se analiziraju mogudnosti obrade struganjem kaljenih čelika alatima od tvrdog metala primjenom specijalne tehnike dovođenja rashladne tekudine u zonu rezanja pod mlazom visokog pritiska 50MPa (High Pressure Jet Assisted Machining-HPJAM). Analizirani su: ugljenični čelik C45E (45 HRc), čelik C45E površinski kaljen na 58 HRc i čelik...
Article
Full-text available
Machining of engineering metallic materials on micro-level is very complicated. Micro-milling with solid tools, as one of microengineering technologies, is an acceptable process to machining of complex metallic micro-parts. The main problem in micro-milling is sensitivity of cutting tool, due its suppleness and short tool life, and its influences t...
Article
Components miniaturization in industry leads to intensive research and development of efficient micro-technologies through research of different production processes, machines and tools. This paper presents experimental research on machinability of inclined surfaces on hardened steel workpieces with long-neck micro-end-ball mills. Workpiece is hard...
Article
Full-text available
High Pressure Jet Assisted Machining (HPJAM) in turning is a hybrid machining method in which a high pressure jet of cooling and lubrication fluid, under high pressure (50 MPa), leads to the zone between the cutting tool edge and workpiece. An experimental study was performed to investigate the capabilities of conventional and high pressure cooling...
Conference Paper
The increase of demands for products miniaturization has led to a need to research and explore the possibilities of micro-machining of special alloys. This paper presents the experimental study on the micro-milling of Inconel 718 super alloy. It is austenitic nickel-chromium based material which is oxidation resistant. Inconel 718 super alloy is us...
Article
The machining of hard-to-machine bearing steel AISI 52100 (100Cr6), hardened to 62 HRc, is almost impossible using standard machining conditions and carbide cutting tools. The purpose of this research is machinability analysis and conclusions about the conditions that allow the machining of mentioned steel with carbide tools. In this paper, the tur...
Article
Full-text available
In this paper, machinability of turned steel defined by monitoring of cutting forces, tool wear, surface quality and chip shape is presented. Experimental investigations were performed on untreated carbon steel C45E (hardness 45 HRc) and on surface induction hardened steel C45E (surface layer hardness 58 HRc). The analysis of machinability was perf...
Article
Full-text available
The development of industry in the last ten years has caused the production of parts with relatively small dimensions. This has led to intensive development of efficient micro-technologies through research of processes, tool machines and tools. This paper presents the research of machinability, channels micro-milling in AISI D2 tool steel (X155CrVM...
Research
Full-text available
This paper presents its own results of the modeling of the basic structure of a horizontal hydraulic press 6000 kN and an operating table that has a capacity of 100 kN using INVENTOR software package. The software package has enabled the modeling, simulation, kinematic animation and structural analysis of the parts and assemblies of the press prior...
Conference Paper
Full-text available
The development of industry in the last ten years has caused the production of parts with relatively small dimensions. This has led to intensive development of efficient micro-technologies through research of processes, tool machines and tools. This paper presents the research of machinability, channels micro-milling in AISI D2 tool steel (X155CrVM...
Article
Full-text available
High Pressure Jet Assisted Machining (HPJAM) in turning is a hybrid machining method where jet of cooling and lubrication fluid, under high pressure (50 MPa), leads to the zone between the cutting tool edge and workpiece. An experimental study has been performed to investigate the capabilities of high pressure jet assisted turning of different stee...
Conference Paper
Full-text available
This paper presents the research and analysis of tool wear in turning of hardened bearing steel 100Cr6 using carbide tools. Machining of the mentioned steel is almost impossible using standard machining conditions and uses of carbide cutting tools. In this study, cutting process is carried out using HPJAM dosing technique in which a jet of cooling...
Conference Paper
Full-text available
High Pressure Jet Assisted Machining (HPJAM) in turning is a hybrid machining method in which a high pressure jet of cooling and lubrication fluid is directed to the contact zone between chip and cutting tool. It uses in highly productive processes of chip removal - roughing and semi-machining. This paper shows that the application of HPJAM offers...
Conference Paper
Full-text available
Znanje o otporima rezanja ima važnu ulogu u upravljanju procesom obrade jer su direktno povezani sa procesom habanja alata, pojavom vibracija, tačnošću dimenzija, itd. Obrada struganjem sa upotrebom HPJAM-a (High Pressure Jet Assited Machining) je hibridni metod obrade, pri kojoj se mlaz sredstva za hlađenje i pomazivanje pod veoma visokim pritisko...
Conference Paper
Full-text available
Definitions of machinability have an important role in material machining and it is defined by different criterions. Some material may have a good machinability according to one criterion, but very low when the other criteria is considered. In this paper, using a new model for defining universal machinability by vector analysis is presented. Using...
Article
Full-text available
This paper provides an analysis of the project of production system for the production of tools for hydraulic press brakes with application of production process simulation. The analysis is based on modeling and simulation of the process planning design for tools for hydraulic press brakes, with application of Experimental Manager module within the...
Technical Report
Full-text available
Research in this report is preliminary experimental research on high performance milling and micro-milling of hard-to-machining materials (tool steels), constructive materials (aluminum) and materials for EDM electrodes (copper). The main idea of future research is possibility of micro-milling of hard-to-machine materials on precision high-speed mi...
Article
Full-text available
In this paper an effect of using of minimal quantity lubrication (MQL) technique in turning operations is presented. Experimental research was performed on carbon steel C45E. Technological parameters: depth of cut, feed rate and cutting speed were adjusted to semi-machining and roughing. Higher values of feed and cutting speed were used, than recom...
Conference Paper
Full-text available
Definitions of machinability have an important role in material machining. Material machinability is most often defined by different criterion. Criterion is based on the output cutting parameters: cutting forces, tool wear, machined surface quality, chip shape, vibration and etc. Some material may have a good machinability according to one criterio...
Article
Full-text available
In this paper, a novel approach to the definition of universal machinability is presented. The machinability model is based on analysing the vector of the cutting process performance. The machinability of C45E steel was analysed and evaluated according to the developed machinability definition. As the machinability criteria, cutting force, intensit...
Conference Paper
Full-text available
Cutting forces is very important indicator of machining process. Knowledge about values and behavior of cutting forces has significant role in machining process defining (defining of material machinability, tool wear, vibrations, temperature in cutting zone, accuracy of process, dimensioning of machine elements, modeling, monitoring and management...
Conference Paper
Full-text available
The plasma arc cutting process severs metal by using a constricted arc to melt a localized area of a workpiece, removing the molten material with a high-velocity jet of ionized gas issuing from the constricting orifice. The ionized gas is a plasma, hence the name of the process. This paper analyzes quality of cut in plasma arc cutting. Quality of c...
Article
Full-text available
Cutting forces are one of the inherent phenomena and a very significant indicator of the metal cutting process. The work presented in this paper is an investigation of the prediction of these parameters in turning using soft computing techniques. During the experimental research focus is placed on the application of various methods of cooling and l...
Article
Full-text available
This paper describes the complete procedure for mathematical modeling of dynamic behavior of a spindle - holder - tool assembly. The developed model, in addition to translational, takes into account the rotational degrees of freedom, and therefore can be used for calculation and prediction of frequency response function of a spindle - tool holder -...
Article
Full-text available
This paper describes the complete procedure for mathematical modeling of dynamic behavior of a spindle - holder – tool assembly. The developed model, in addition to translational, takes into account the rotational degrees of freedom, and therefore can be used for calculation and prediction of frequency response function of a spindle - tool holder –...
Conference Paper
Full-text available
Cutting forces (reactions) represent very significant indicator of machining process because they demonstrates characteristics of status and behavior of machining process. Knowing of cutting forces has significant role in procedure of power defining which is necessary for executing of machining process, material machinability, tool wear and vibrati...
Conference Paper
Full-text available
Galvanic coatings are applied to the base material surface in order to obtain some of the following characteristics: resistance to corrosion, chemical inertness, wear resistance, higher dimensions, lower coefficient of friction and a better aesthetic impression. Most studies of protective metal coatings focuses on the characterization of coatings a...
Article
Full-text available
Rapid development of technologies encourages development of new materials, cutting tools, machine tools and cutting fluids and lubricants. Definitions of machinability have an important role, because it depends a number of influencing factors, primarily associated with mechanical, structural and thermal characteristics of working material and it is...
Conference Paper
Full-text available
Poboljšanje kvaliteta obradnog sistema je neprekidna težnja korisnika. Jedan od mogućih pravaca za poboljšanje je uvođenje pojma vektor snage sistema. To je vektorski zbir pojedinačnih vektora - pokazatelja kvaliteta procesa u posmatranom obradnom sistemu. Može se predstaviti u pravouglom koordinatnom sistemu, čije su ose najuticajniji pokazatelji...
Article
The introduction of the paper gives the basic concepts of Failure Modes, Effects and Criticality Analysis - FMECA. Features of elements of mechanical systems regarding failure intensity demand special approach of quantitative FMECA. The paper depicts this approach, applied for elements of mechanical systems and used for design of a software package...
Conference Paper
Full-text available
Development of new technologies encourage development of new materials, tools and cutting fluids and lubricants, and it is based on the development of flexible processing systems whose characteristics can respond to specific demands in production. Studies of interaction between machining system as whole unit and the quality of products are a comple...
Article
Development of rapid model investigation and simulation of cutting process is result of intensive development of new materials and new tools with specific geometry made of new tool materials. This work presents relatively simplified model of investigation caring out on tribometer "Block on Disk", where contact conditions over line is simulated, cor...
Article
Development and application of new materials and increased application of calculations, simulations and modeling in area of metal cutting asks for the knowledge of friction coefficient for pairs made of these materials and cutting tool materials. Part of results of friction coefficient measurement at "Block on disc" tribometer, for pairs made of Al...

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Projects

Projects (2)
Project
Coordinators: PhD Janez Kopač, Faculty of Mechanical Engineering in Ljubljana, http://lab.fs.uni-lj.si/labod/eng/clani-01.php PhD Gordana Globočki Lakić, Faculty of Mechanical Engineering Banja Luka, http://www.unibl.org/sr/fis/zaposlen/1175-gordana-globocki-lakic Description: The project carried out research related to the application of micro-milling in die and mould industry. Studies are made with hardened difficult-to-cutting steel.