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The parameter correlation of acoustic emission and high-frequency vibrations in the assessment process of the operating state of the technical system

Baron P., Dobránsky J, Pollák M., Kočiško M., Cmorej T.

Acta Mechanica et Automatica

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2016

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Vol. 10, no. 2

112--116

EN

The article describes application of selected methods of technical diagnostics for assessing the operating status of precision gearboxes. Within the confines of experimental measurements in the field of physical metallurgy materials of diagnosed system were being examined while taking into account the process of degradation of material properties during operation of monitored gearboxes. Measurements and collecting of dynamic data were realized on 4 selected gearboxes where a high-frequency vibrations and acoustic emission (noise) measurements were carried out. Retrieved values were subsequently used for mutual correlation and verification of applied methods. Results of both selected methods underlined unsatisfactory operation status with 3 inspected gearboxes. Measured values were identified as being above suggested caution limit of Alarm 2, representing a level of danger.

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Monitoring diagnostic indicators during operation of a print machine

Dobránsky J, Baron P., Kočiško M., Telišková M

Advances in Science and Technology. Research Journal

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2015

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Vol. 9, nr 28

34--39

EN

This article deals with monitoring diagnostic indicators during the operation of a machine used for production of packing materials with a print. It analyses low-frequency vibrations measured in individual spherical roller bearings in eight print positions. The rollers in these positions have a different pressure based on positioning these rollers in relation to the central roller. As a result, the article also deals with a correlation of pressure and level of measured low-frequency vibrations. The speed of the print machine (the speed of a line in meters per minute) is a very important variable during its operation, this is why it is important to verify the values of vibrations in various speeds of the line, what can lead to revelation of one or more resonance areas. Moreover, it examines vibrations of the central roller drive and measurement of backlash of transmission cogs of this drive. Based on performed analyses recommendations for an operator of the machine have been conceived.

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Problems of kinematics simulations of machining devices in NX system

Kočiško M.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Nauki Techniczne

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2009

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Z. 13

176--180

EN

This paper describes possibilities of kinematics simulation of machining devices with aim not only to observe simulation of machining process itself, but whole working environment of the machine. This is conditioned by functionally created postprocessor, so the complete NC program could be generated for given device, that is to be simulated as a whole.