An investigation on the effect of cutting parameters in CNC plasma cutting process for carbon steel

An Duong Khang,Nguyen Hoang Anh,Nguyen Thi Chau,Pham Hong Son,Pham Thi Hang

doi:10.31817/vjas.2020.3.4.06

Abstract

The effect of technological parameters such as gas pressure, cutting current, standoff distance, and cutting speed on the cutting surface quality of CNC plasma cutting process was investigated. The experiment was carried out by Bruco CNC plasma cutting machine for CT3 steel with different thicknesses. The quality characteristics examined included the ability to cut out samples, the slag formation on the surface, the surface roughness, and the cut angle. The analysis of the results was made using the Taguchi method in order to determine the contribution of each-individual parameter to the cutting quality, especially surface roughness. The obtained results show that the value of cutting current should be set up at a real value in order to cut out of the sample. The air pressure strongly affected the slag formation. The surface roughness was mainly affected by the standoff distance and air pressure, whereas the cutting speed and cutting current were the minor influencing parameters.

Highlights

The plasma process for cutting was developed approximately thirty years ago (Ilii et al, 2010)
It can be seen from the past research that the cutting quality of computer numerical control (CNC) plasma cutting process is evaluated by the ability to cut out the sample, the slag formation on the surface of the sample, the cut angle and the roughness of the cut surface
Many studies have been carried out on CNC plasma cutting machines to investigate the influence of process parameters on cutting product quality, the existing research results are only applicable to a kind of steel with a given thickness

Summary

Introduction

The plasma process for cutting was developed approximately thirty years ago (Ilii et al, 2010). A mathematical model was established by Guo et al (2010) for plasma cutting methods to improve the cutting parameters to a level better than normal conditions As a result, it can be seen from the past research that the cutting quality of CNC plasma cutting process is evaluated by the ability to cut out the sample, the slag formation on the surface of the sample, the cut angle and the roughness of the cut surface. Many studies have been carried out on CNC plasma cutting machines to investigate the influence of process parameters on cutting product quality, the existing research results are only applicable to a kind of steel with a given thickness. The analysis of the results was used to determine the contribution of each individual parameter to the cutting quality

Materials and Methods

Experimental setup

Results and Discussion

Conclusions