Ústav výrobních strojů, systémů a robotiky
Browse
Recent Submissions
Now showing 1 - 5 of 25
- ItemA Case Study on Assessing the Capability and Applicability of an Articulated Arm Coordinate Measuring Machine and a Touch-Trigger Probe for On-Machine Measurement(MDPI, 2024-11-23) Sámelová, Vendula; Marek, Tomáš; Jelínek, Adam; Jankových, Róbert; Maradová, Karla; Holub, MichalIn modern manufacturing, there is an increasing demand for reliable in-process measurement methods directly on large CNC machine tools, eliminating the need to transport workpieces to metrological laboratories. This study assesses the capability and applicability of an articulated arm coordinate measuring machine and a machine tool touch-trigger probe when measuring to a specified tolerance of 0.05 mm in a production environment. Experiments were conducted using the KOBA calibration standard and included measurements with and without applying the articulated arm coordinate measuring machine leapfrog method. The results were evaluated according to ISO 22514-7:2021 and ISO 14253-1:2017, which establish criteria for measurement system capability. The findings revealed that neither measurement system met the capability requirements of ISO 22514-7:2021, particularly due to unsatisfactory QMS and CMS values. However, under ISO 14253-1:2017, both systems were deemed conditionally suitable for verifying conformity to the specifications, with the articulated arm coordinate measuring machine showing lower applicability when using the leapfrog method. This research supports the idea that unreasonable demands for compliance with current standards may lead to questioning of the systems that previously met older standards. The study contributes to the ongoing discussion on integrating advanced metrological tools into the manufacturing process and underscores the need for careful evaluation to ensure the capability and reliability of measurement systems in industrial practice.
- ItemAgeing Management in the Prevention of Major Accidents in the Czech Republic(The Italian Association of Chemical Engineering, 2024-11-01) Kotek, Luboš; Křivánek, David; Mukhametzianova, Leisan; Trávníček, PetrThis study examines the phenomenon of ageing in the context of major accident prevention, with a particular focus on the growing recognition of ageing as a significant contributor to industrial accidents. The concept of ageing has evolved from its initial association with material degradation to encompass a broader range of factors, including equipment obsolescence, spare parts availability and staff expertise. Legislation such as the European SEVESO III Directive has incorporated the issue of aging into safety management systems, reflecting its critical importance. A mixed-methods approach was employed, combining a literature review with a questionnaire survey, for the purpose of assessing ageing management practices in industrial facilities. The survey was completed by 103 respondents from the Czech Environmental Inspectorate. The results demonstrated that while 67% of respondents considered aging to be significant, gaps in documentation and planning still posed safety risks. A chi-square test revealed a statistically significant correlation between facility age and major accidents (p < 0.05). These findings highlight the necessity for enhanced awareness and training in aging management, advocating for structured information dissemination and methodological improvements in future studies.
- ItemTextura povrchu Profilové a plošné parametry(Vysoké učení technické v Brně; Fakulta strojního inženýrství; Ústav výrobních strojů, systémů a robotiky, 2024-09-09) Jankových, Róbert; Polzer, AlešTextura povrchu - popis profilových a plošných parametrů dle norem řady: ČSN EN ISO 4287, 4288; 13565 a 21920.
- ItemComparison of Taguchi’s partial correction technique with control charts(MM publishing Ltd., 2015-10-01) Kotek, Luboš; Nosek, Aleš; Fiala, Alois; Zahálka, JiříThis article compares the most commonly used methods of statistical quality control (control charts - in our case the control chart of individual values) with the Taguchi’s method of Partial Correction. The comparison applies to an actual process of hole reaming, and a test is carried out of gradual change of setting (continuously increasing simulation deviation).
- ItemAn Evaluation of On-Tool System for Sanding Dust Collection: Pilot Study(Walter de Gruyter, 2020-09-30) Dado, Miroslav; Lamperová, Anna; Kotek, Luboš; Hnilica, RichardHazards identification is essential step in framework of occupational health & safety (OH&S) management system. The task of spruce wood sanding with hand-held power belt sander is considered as a significant resource of exposure to wood dust. Dust from spruce wood is hazard that can cause negative health effects such as asthma and chronic bronchitis. A dust collection box is a commonly used technical measure for reducing exposure to wood dust for this task in practice. The objective of this pilot study was to evaluate the effectiveness of commercially available dust collection box at reducing exposure to wood dust during the task of sanding spruce wood using hand-held power belt sander. Laboratory experiment involved sanding spruce planks (250 mm x 50 mm x 500 mm) in longitudinal direction using belt sander (Bosch, PBS 75 A) with 120 grit sanding belt. Spruce dust mass concentrations were sampled using an aerosol monitor (TSI Inc., DustTrak DRX 8533) in the breathing zone of operator. Inhalable and respirable dust concentrations were both significantly lower (P < 0.0001) when dust box was attached to belt sander compared with sander without a dust box. Results from this pilot study indicate that dust collection box is efficient technical measure for decreasing exposure to aerosol mass concentration during sanding spruce wood with hand-held belt sander.