Authors: RakhimyanovKh.M, GaarN.P., A.A. Loktionov

Title of the article: Optimization of the high-precision plasma cutting mode for sheet materials based on dimensionless process parameters

Year: 2018, Issue: 4, Pages: 23-31

Branch of knowledge: Mechanical engineering and machine science

Index UDK: 621.791.947.55, 621.9.01

DOI: 10.26730/1999-4125-2018-4-23-31

Abstract: High-precision plasma cutting is one of the methods of sheet material cutting. Optimization of cutting mode aimed at minimizing the deviation of the cut squareness allows us to exclude the subsequent mechanical processing of parts for welding. However, the multi-factorial nature of the processes that determine the position of the edges of the cut does not allow us to use methods of mathematical modeling of processes, as well as an experimental approach, to solve this problem. The purpose of this work is to determine the possibility of using dimensionless complexes and similarity theory to identify the energy parameters of the process of high-precision plasma cutting to minimize the deviation from cut squareness. It is proposed to use the dimensionless power and the Peclet number as dimensionless parameters of the high-precision plasma cutting process, determining the cut squareness. It is established experimentally that the minimum value of the deviation of cut squareness is achieved in a narrow range of Peclet number values (from 1.4 to 1.9). Experimental studies were carried out on structural steel (St3) with a thickness of 4 to 20 mm on a thermal cutting machine "TermitPPl" using HiFocusplustechnology of high-precision plasma cutting.

Key words: High-precision plasma cutting squareness of cut dimensionlesspower Peclet number

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