Modelling of Guillotine Cutting of a Cold-Rolled Steel Sheet

Abstract

In this paper, the modelling of a cutting process of a cold-rolled steel sheet using a symmetrical cutting tool is presented. The fast-changing nonlinear dynamic cutting process was elaborated by means of the finite element method and the computer system LS-DYNA. Experimental investigations using scanning electron microscopy were performed and the results are presented in this work. The numerical results were compared with experimental ones. The comparison shows a good agreement between the results obtained by means of numerical modelling and those received from experimental investigations. The numerical simulations of the cutting process and the experimental investigations aimed to understand the mechanism of the cutting process. They serve as a highly professional tool for carrying out research investigating the behavior of complex nonlinear fast-changing dynamical cutting processes in the future.

Study of Selected Physical-Mechanical Properties of Corn Grains Important from the Point of View of Mechanical Processing Systems Designing

“…The mechanical properties of cobs, stems, and corn kernels determine the construction and operational parameters of the equipment intended for cutting, harvesting, and processing (e.g., grinding) of this plant [ 13 , 14 , 15 , 16 , 17 , 18 ]. They also affect the power consumption and energy consumption of cutting and grinding machines and equipment [ 19 , 20 , 21 , 22 , 23 , 24 ]. Since reduction in energy intensity is one of the key rules of sustainable economy [ 25 , 26 , 27 , 28 ], determining the forces needed to break grains is of key importance when developing the grinding process energy and environmental efficiency indicators, as well as modeling grinding and crushing processes with the use of the discrete element method DEM [ 15 , 29 ].…”

Modelling of the Guillotine Cutting Process by Means of a Symmetrical Blade with the Defined Geometry

“…The applied finite element consists of four nodes with two degrees of freedom in a single node that constitute the displacements along x and y axes, respectively. The mesh size was estimated optimally on the basis of the experimental and numerical data, which additionally were matched up with the research results published in scientific papers [17,24] so far. The mesh size of the sheets being cut was established at 0.02 mm in the horizontal direction and 0.01 mm in the vertical direction, respectively.…”

“…During the plastic shearing in metal sheets (Figure 4b,c and Figure A1b,c), many kinds of defects are produced. Edge bending, vertical scratches in the shape of craters, and burrs belong to the most popular defects [2, [17][18][19][20][21][22][23][24]. The frequency of their occurrence depends on the sharpness of the blade and quality of external surface of a cutting tool (e.g., lack of built-up edges, dents, etc.)…”

“…It is worth mentioning that for the second minimum peak, it is not so apparent. It has been found that the second minimum peak corresponds to the transition line between the plastic and brittle zone after many efforts concerning the research devoted to different geometry of a cutting tool [24]. The second peak corresponds to the node C lying on the cutting line.…”

“…It is feasible to cut a single metal sheet or a bundle of ultra-thin metal sheets, but it is rather obvious that the cutting of a bundle of sheets is more effective [17][18][19][20][21] than cutting a single sheet [22][23][24]. Another approach is related to the geometry of a cutting tool.…”