Utilization Rates of NC Lathe Machine for the Evaluation of Safety Requirements Luca Landi1, Enrico Annacondia2 and Mirco Vertelli3 1Department of Engineering, University of Perugia, Via G. Duranti, 63, Perugia, Italy. luca.landi@unipg.it 2UCIMU-Sistemi per Produrre, Viale F. Testi, 128, Cinisello Balsamo (MI) – Italy. tech.dept@ucimu.it 3COMEV S.p.A., Via Chiantigiana 39, Montevarchi (AR), Italy. mirco@comev.it ABSTRACT Utilization rates of numerically controlled (NC) machine tools have to be known by machine builders at least to predict general reliability of the machine. With the introduction of standards such as the ISO 13849-1, the reliability calculation of safety related components of the control system become a requirement for every machine tool with a NC. Data are usually collected without taking into consideration the different operational modes of nowadays machine tools (such as automatic, manual, setup, …). Conversely the reliability calculation of a given Safety Function often requires the knowledge of the specific operational mode where each SF will be used because of the different safety condition of the workers. In the paper the result of a survey proposed to the end users of 7 different NC lathes, regarding expected utilization of their machines, will be first presented. Than the expected utilization will be compared to the real utilization of each machine tool measured, at least for one year, through an installed NC software able to take into account all the tasks during production. The comparisons between the expected and real use of the lathe machines is presented also in terms of different types of lathes such as: mass/shop floor production. A review on potential improvement due to the utilization of the so called “digital manufacturing” paradigm will be also presented, outlining a methodology to support the end users in the utilization of the solutions described above. Keywords: Machine tools safety, Demand rates of lathes, Safety function evaluation, Industry 4.0
Utilization Rates of NC Lathe Machine for the Evaluation of Safety Requirements
Landi L.
Writing – Original Draft Preparation
;Annacondia E.;
2019
Abstract
Utilization Rates of NC Lathe Machine for the Evaluation of Safety Requirements Luca Landi1, Enrico Annacondia2 and Mirco Vertelli3 1Department of Engineering, University of Perugia, Via G. Duranti, 63, Perugia, Italy. luca.landi@unipg.it 2UCIMU-Sistemi per Produrre, Viale F. Testi, 128, Cinisello Balsamo (MI) – Italy. tech.dept@ucimu.it 3COMEV S.p.A., Via Chiantigiana 39, Montevarchi (AR), Italy. mirco@comev.it ABSTRACT Utilization rates of numerically controlled (NC) machine tools have to be known by machine builders at least to predict general reliability of the machine. With the introduction of standards such as the ISO 13849-1, the reliability calculation of safety related components of the control system become a requirement for every machine tool with a NC. Data are usually collected without taking into consideration the different operational modes of nowadays machine tools (such as automatic, manual, setup, …). Conversely the reliability calculation of a given Safety Function often requires the knowledge of the specific operational mode where each SF will be used because of the different safety condition of the workers. In the paper the result of a survey proposed to the end users of 7 different NC lathes, regarding expected utilization of their machines, will be first presented. Than the expected utilization will be compared to the real utilization of each machine tool measured, at least for one year, through an installed NC software able to take into account all the tasks during production. The comparisons between the expected and real use of the lathe machines is presented also in terms of different types of lathes such as: mass/shop floor production. A review on potential improvement due to the utilization of the so called “digital manufacturing” paradigm will be also presented, outlining a methodology to support the end users in the utilization of the solutions described above. Keywords: Machine tools safety, Demand rates of lathes, Safety function evaluation, Industry 4.0I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
