Authors: GaarN.P., А.Kh. Rakhimyanov, LoktionovA.A.

Title of the article: Prevention of cutting defects by optimizing the trajectory for high-precision plasma cutting

Year: 2018, Issue: 2, Pages: 70-75

Branch of knowledge: Mechanical engineering and machine science

Index UDK: 621.791.947.55, 621.9.01

DOI: 10.26730/1999-4125-2018-2-70-75

Abstract: High-precision plasma cutting is one of the modifications of plasma-arc cutting of metallic materials. The possibilities of this kind of material cutting are characterized by the fact that the quality of the obtained cut face of the part is close to laser cutting, and in some cases, it is possible to exclude subsequent machining of such parts. However, with high-precision plasma cutting, the appearance of various kinds of local defects is possible. The purpose of this paper is to minimize the local defect in the form of a rounding that occurs during material cutting when changing the direction of motion. Experimental studies were carried out on structural steel grade St3 of 4 to 20 mm thickness using the thermal cutting machine "Termite PPL" and HiFocusplus high-precision plasma cutting technology. As a result of experiments, it was established that the radius of rounding increases with the thickness of the material being cut. The use of "loops" in the motion path of the plasma torch is proposed to exclude the acceleration and deceleration zones on the contour when cutting materials. It is experimentally established that the use of "loops" leads to a reduction in the radius of the rounding up to 2 times compared with cutting of the material without using them.

Key words: High-precision plasma cutting radii of rounding defects in cutting materials loop scheme of cutting

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