doc. Ing., Dipl.-Ing Michal Holub, Ph.D.
E-mail:   holub@fme.vutbr.cz  Dept.:   Institute of Production Machines, Systems and Robotics Dept. of Production Machines Position:   Head of Department Room:   A1/1221 Dept.:   Institute of Production Machines, Systems and Robotics Dept. of Production Machines Position:   Associate Professor Room:   A1/1221

Supervised courses:

• Bachelor Project (B-VSY) (6BV)
• Bachelor Seminar (B-VSY) (GSB)
• Calculations and Simulation in Design of Machine Tools (GOK)
• Calculations and Simulation in Design of Machine Tools (GOK-K)
• Operation of Machine Tools (GPS)
• Operation of Machine Tools (GPS-K)
• Term Thesis B-VSY (GSO)
• Test Code for Machine Tools (GTS)
• Test Code for Machine Tools (GTS-A)
• Test Code for Machine Tools (GTS-K)

Publications:

• BLECHA, P.; HOLUB, M.; MAREK, T.; JANKOVÝCH, R.; MIŠÚN, F.; SMOLÍK, J.; MACHÁLKA, M.:
  Capability of measurement with a touch probe on CNC machine tools, Elsevier
  journal article in Web of Science
• ŠTĚPÁNEK, V.; BRAŽINA, J.; HOLUB, M.; VETIŠKA, J.; KOVÁŘ, J.; KROUPA, J.; JELÍNEK, A.:
  Implementation of Industry 4.0 Elements in Industrial Metrology – Case Study,
  Digitizing Production Systems, pp.296-308, ISBN 978-3-030-90421-0, (2021), Springer, Cham
  conference paper
  akce: International Symposium for Production Research 2021, Antalya, 07.09.2021-09.09.2021
• VETIŠKA, J.; HOLUB, M.; BLECHA, P.; BRADÁČ, F.; BRAŽINA, J.; STANĚK, V.; KROUPA, J.; TŮMA, Z.:
  Industry 4.0 in Educational Process,
  Digital Conversion on the Way to Industry 4.0, pp.324-332, ISBN 978-3-030-62783-6, (2020), Springer, Cham
  conference paper
  akce: International Symposium for Production Research 2020, Antalya , 24.09.2020-26.09.2020
• HOLUB, M.; MAREK, T.; MÁČALA, D.; BEDNÁŘ, J.; BRADÁČ, F.; BLECHA, P.:
  INFLUENCE OF THE VOLUMETRIC ACCURACY OF MACHINE TOOL ON THE WORKING SPACE SIZE, MM SCIENCE
  journal article in Web of Science
• BRAŽINA, J.; VETIŠKA, J.; BRADÁČ, F.; HOLUB, M.; STANĚK, V.:
  Virtual commissioning as part of the educational process,
  19th MECHATRONIKA 2020, pp.311-317, ISBN 978-1-7281-5601-9, (2020)
  conference paper
  akce: Mechatronika 2020, Praha, 02.12.2020-04.12.2020
• HOLUB, M.; ROSENFELD, J.:
  Geometric Accuracy of Large Machine Tools,
  Acta Mechanica Slovaca, Vol.24, (2020), No.3, pp.56-62, ISSN 1335-2393, Technical University of Kosice
  journal article - other
• HOLUB, M.; JANKOVÝCH, R.; VETIŠKA, J.; ŠRÁMEK, J.; BLECHA, P.; SMOLÍK, J.; HEINRICH, P.:
  Experimental Study of the Volumetric Error Effect on the Resulting Working Accuracy—Roundness, MDPI
  journal article in Web of Science
• MAREK, J.; HOLUB, M.; MAREK, T.; BLECHA, P.:
  Geometric Accuracy, Volumetric Accuracy and Compensation of CNC Machine Tools,
  Machine Tools - Design, Research, Application, pp.1-19, ISBN 978-1-83962-351-6, (2020), IntechOpen
  book chapter
• HOLUB, M.; MAREK, T.; KNOBLOCH, J.:
  A study of the application of volumetric compensation by direct and indirect measurement methods, MM Science Journal
  journal article in Web of Science
• HOLUB, M.; TŮMA, Z.; KROUPA, J.; KOVÁŘ, J.; BLECHA, P.:
  Case Study of Digitization of the Production Cell,
  Proceedings of the International Symposium for Production Research 2019, pp.253-262, ISBN 978-3-030-31342-5, (2019), Springer International Publishing
  conference paper
  akce: International Symposium for Production Research 2019, Vídeň, 28.08.2019-30.08.2019
• HOLUB, M.; VETIŠKA, J.; ANDRŠ, O.; KOVÁŘ, J.:
  Effect of position of temperature sensors on the resulting volumetric accuracy of the machine tool, Elsevier
  journal article in Web of Science
• HOLUB, M.:
  Geometric Accuracy of Machine Tools,
  Measurement in Machining and Tribology, pp.89-112, ISBN 978-3-030-03821-2, (2019), Springer, Cham
  book chapter
• HOLUB, M.; BRADÁČ, F.; POKORNÝ, Z.; JELÍNEK, A.:
  APPLICATION OF A BALLBAR FOR DIAGNOSTICS OF CNC MACHINE TOOLS, MM Science Journal
  journal article in Web of Science
• HOLUB, M.; JANKOVÝCH, R.; ANDRŠ, O.; KOLÍBAL, Z.:
  Capability Assessment of CNC Machining Centres as Measuring Devices, ELSEVIER
  journal article in Web of Science
• HOLUB, M.; VETIŠKA, J.; BRADÁČ, F.; VALA, M.:
  APPLICATION ON-THE-FLY MEASUEREMENT OF CNC MACHINE TOOLS , MM Science Journal
  journal article in Scopus
• HRDINA, J.; VAŠÍK, P.; HOLUB, M.:
  Dual numbers arithmentic in multiaxis machine error modeling, MM Science
  journal article in Scopus
• HOLUB, M.; BLECHA, P.; BRADÁČ, F.; MAREK, T.; ŽÁK, Z.:
  GEOMETRIC ERRORS COMPENSATION OF CNC MACHINE TOOL, MM publishing Ltd.
  journal article in Scopus
• HOLUB, M.; VETIŠKA, J.; KNOBLOCH, J.; MINÁŘ, P.:
  Analysis of Machine Tool Spindles under Load,
  Applied Mechanics and Materials, Vol.2016, (2016), No.821, pp.608-613, ISSN 1662-7482, Trans Tech Publications
  journal article - other
• HOLUB, M.; HRDINA, J.; VAŠÍK, P.; VETIŠKA, J.:
  Three-axes error modeling based on second order dual numbers, Springer-Verlag
  journal article in Web of Science
• HOLUB, M.; BLECHA, P.; BRADÁČ, F.; KAŇA, R.:
  VOLUMETRIC COMPENSATION OF THREE-AXIS VERTICAL MACHINING CENTRE
  journal article in Scopus
• HOLUB, M.; KNOBLOCH, J.:
  Geometric accuracy of CNC machine tools,
  Proceedings of the 16th International Conference on Mechatronics – Mechatronika 2014, pp.260-265, ISBN 978-80-214-4817-9, (2014), Brno University of Technology
  conference paper
  akce: 16th International Conference on Mechatronics - Mechatronika 2014, Brno, 03.12.2014-05.12.2014
• KNOBLOCH, J.; HOLUB, M.; KOLOUCH, M.:
  LASER TRACKER MEASUREMENT FOR PREDICTION OF WORKPIECE GEOMETRIC ACCURACY,
  Engineering mechanics 2014, pp.296-300, ISBN 978-80-214-4871-1, (2014), Institute of Solid Mechanics, Mechatronics and Biomechanics
  conference paper
  akce: Engineering Mechanics 2014, Svratka, 12.05.2014-15.05.2014
• FOLLER, B.; HOLUB, M.; ŠESTÁK, J.:
  Acoustic composite laminates with unidirectional fiber reinforcement by novel pultrusion drawing, Springer Netherlands
  journal article in Web of Science
• HOLUB, M.; MICHALÍČEK, M.; VETIŠKA, J.; MAREK, J.:
  Prediction of Machining Accuracy for Vertical Lathes,
  Mechatronics 2013 Recent Technological and Scientific Advances, pp.41-48, ISBN 978-3-319-02294-9, (2013), Spinger
  conference paper
  akce: 10th International Conference on Mechatronics, Brno, 07.10.2013-09.10.2013

List of publications at Portal BUT

Abstracts of most important papers:

• HOLUB, M.; VETIŠKA, J.; KNOBLOCH, J.; MINÁŘ, P.:
  Analysis of Machine Tool Spindles under Load,
  Applied Mechanics and Materials, Vol.2016, (2016), No.821, pp.608-613, ISSN 1662-7482, Trans Tech Publications
  journal article - other
  This paper deals with a new experimental approach to the analysis of radial, axial, and tilt error movements of machine tool spindles under load. The main focus is on the identification of error spindle movements under different machine operation conditions between 500 - 5000 rev / min and loads in the range of 50 - 500 N. Errors of the spindle movements are measured on the cylindrical workpiece using capacitance sensors for different loads. The analysis of measurements of radial, axial, and tilt error movements of machine tool spindle indicates a dependency of loads and measured errors. The integration of error measurements into novel multi-body dynamic models of machine tool spindles is very important for prediction of machine behaviour during a cutting process and for prediction of workpiece geometric accuracy.
• HOLUB, M.; HRDINA, J.; VAŠÍK, P.; VETIŠKA, J.:
  Three-axes error modeling based on second order dual numbers, Springer-Verlag
  journal article in Web of Science
  The aim of the paper is to employ the dual numbers in the multi axes machine error modelling in order to apply the algebraic methods in computations. The calculus of higher order dual numbers allows us to calculate with the appropriate geometric parametrization effectively. We test the model on the phantom data based on the real machine tool. The results of our analysis are used for the geometric manufacturing accuracy description of the work space, together with the reduction of the measuring time.
• HOLUB, M.; BLECHA, P.; BRADÁČ, F.; KAŇA, R.:
  VOLUMETRIC COMPENSATION OF THREE-AXIS VERTICAL MACHINING CENTRE
  journal article in Scopus
  This contribution assesses the possibilities of application of volumetric compensation technology on a small three-axis vertical machining centre. These machine tools are designed for machining of small workpieces with various requirements on dimensional and shape accuracy. Small machine tools do not show large volumetric deviations across the entire working space as it is seen with medium-sized and large machining centres. To test volumetric compensation, detailed measurements on a small machining centre (demonstrator) were performed prior to activation of compensation set; other verification measurements were carried out with activated compensation set. Even if volumetric compensation is deployed, it is necessary to verify the achieved results in an appropriate manner. The accomplished study will offer pertinent conclusions on the appropriateness of the technology to be deployed for selected types of workpieces.
• HOLUB, M.; KNOBLOCH, J.:
  Geometric accuracy of CNC machine tools,
  Proceedings of the 16th International Conference on Mechatronics – Mechatronika 2014, pp.260-265, ISBN 978-80-214-4817-9, (2014), Brno University of Technology
  conference paper
  akce: 16th International Conference on Mechatronics - Mechatronika 2014, Brno, 03.12.2014-05.12.2014
  The present article is dedicated to the identification and interpretation of geometric errors of CNC machine tools. Identification of geometric errors plays a large role in the construction of the so-called "Error maps". These maps can be used to describe the behaviour of the machine in the workspace without load or under conditions of finishing operations. Interpreting the error maps represents a tool to check the state of the machine for the user and to offer the important information for the machine manufacturer. From this information it is possible to identify "weak" points of the machine. Simultaneously, the information on the geometrical errors is used to compensate for machine tools. When constructing the maps, a selection of the measuring device and ambient conditions plays an important role. The paper focuses on the use of measuring equipment LaserTRACER and construction of the error map for the workspace of horizontal three-axis milling machine. It also describes the options of how to monitor the workspace of the machine and their mutual evaluation.
• AUGSTE, J.; HOLUB, M.; KNOFLÍČEK, R.:
  Tools for Visualization of Active Power and Energy at Machine Tools,
  Mechatronic systems and materials, pp.1-5, ISBN 978-83-64056-58-1, (2014), Oficyna Wydaw. Politechniki Opolskiej
  conference paper
  akce: Mechatronic systems and materials. MSM-2014. 10th International conference,, Opole, 07.07.2014-10.07.2014
  The article deals with the development of software tools supporting machining process in order to inspect individual energy flows, specifically power on the actuators, air flow and cooling lubricant flow. Interesting time intervals are selected and highlighted. This enables a considerably easier assessment of relationship between actual machining task and its impact on energy consumption. The first part of the article is concerned with the application created for simulation of energy flows in the machine tool with the help of advanced post-processing. That allows software to select to review only interesting data using peaks identifying algorithm. The second part deals with developing of suitable Sankey diagrams visualizations.