Digital twin of stone sawing processes
- PDF / 703,011 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 89 Downloads / 206 Views
ORIGINAL ARTICLE
Digital twin of stone sawing processes Wilma Polini 1
&
Andrea Corrado 1
Received: 22 May 2020 / Accepted: 9 November 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract The industry is facing the management of manufacturing processes along the entire lifecycle of the product. It is helped by digital twin tools that may minimize the out of control of processes. Information and communication technologies help digital twin tools to monitor manufacturing performances. In this way, a continuous and unambiguous flow of information flows along the whole product lifecycle along digital process. They are based on data coming from manufacturing and inspection. Actually, no digital twin tool exists that assists machining of ornamental stones. Moreover, the models proposed by the literature take into account a unique aspect of the manufacturing process, such as the control of the cutting force and energy or the monitoring of the tool wear and, therefore, it does not exist a continuous flow of information from cutting force to tool monitoring. The present work introduces a digital twin tool to manage force, energy, and tool wear during machining of ornamental stone. It uses high-fidelity models for simulation that were widely experimentally tested. It establishes a continuous and unambiguous flow of information from machine to tool, and from cutting force and energy estimation to tool wear prediction. It was applied to two case studies and the obtained results agree with the experimental ones. Keywords Digital twin . Sawing . Ornamental stone . Cutting force . Tool wear . Mill . Disk
Nomenclature b Width of cut (mm) d Tool diameter (mm) dp Depth of cut (mm) heq Equivalent chip thickness (mm) vt Cutting speed (mm/min) va Feed speed (mm/min) Ff Cutting force component along feed direction (N) Ft Tangential cutting force (N) Fr Radial cutting force (N) R Resultant of cutting forces (N) β Angle between Ff and R (°) δ Angle between Ft and Fr (°) θ Angle of contact between tool and workpiece (°)
* Wilma Polini [email protected] Andrea Corrado [email protected] 1
Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via G. di Biasio 43, 03043 Cassino, Italy
Ec MRR
Specific cutting energy (J/m3) Material removal rate (mm3/min)
1 Introduction Stone hardness and wear resistance together with its aesthetic properties make it suitable for structural applications. In such cases, stone is cut by diamond tools whose diamond hard grits wear away stone mineral constituents. To efficiently use the cutting process, it is needed to know the prevailing mechanism of abrasive–workpiece interactions. The understanding of the cutting phenomena leads to models that voice the relationship between cutting behavior and control parameters. Many models exist in the literature that deals with cutting operation of stones. Jerro et al. modeled the relationship among the chip thickness, the chip section, and the tangential cutting force [1]. Branch et al. put into relationshi
Data Loading...
