Experimental study of mild steel cutting process by using the plasma arc method

2021 ◽  
Vol 108 (2) ◽  
pp. 75-85
Author(s):  
H.M. Magid
Keyword(s):  
Industrial Process ◽  
Scanning Speed ◽  
Cutting Parameters ◽  
Operating Conditions ◽  
Kerf Width ◽  
Cutting Process ◽  
Plasma Cutting ◽  
Plasma Arc ◽  
Cutting Equipment

Purpose: In this study, plasma arc cutting (PAC) is an industrial process widely used for cutting various away types of metals in several operating conditions. Design/methodology/approach: It is carried out a systematic or an authoritative inquiry to discover and examine the fact, the plasma cutting process is to establish the accuracy and the quality of the cut in this current paper assessed a good away to better the cutting process. Findings: It found that the effect of parameters on the cutting quality than on the results performed to accomplish by statistical analysis. Research limitations/implications: The objective of the present work paper is to achieve cutting parameters, thus the quality of the cutting process depends upon the plasma gas pressure, scanning speed, cutting power, and cutting height. Practical implications: The product of the plasma cutting process experimentally has been the quality of the cutting equipment that was installed to monitor kerf width quality by exam the edge roughness, kerf width, and the size of the heat-affected zone (HAZ). Originality/value: The results reveal that were technically possessed of including all the relevant characteristics, then a quality control for the cutting and describe the consequence of the process parameters.

scholarly journals An Experimental Analysis of Cutting Quality in Plasma Arc Machining

2020 ◽  
Vol 45 (1) ◽  
pp. 1-8
Author(s):  
Marin Gostimirović ◽  
Dragan Rodić ◽  
Milenko Sekulić ◽  
Andjelko Aleksić
Keyword(s):  
Cutting Speed ◽  
Kerf Width ◽  
Machining Accuracy ◽  
Maximum Height ◽  
Machining Parameters ◽  
Plasma Arc ◽  
Low Carbon ◽  
Plasma Arc Cutting ◽  
Machining Quality

Plasma arc cutting (PAC) is an unconventional process widely used in manufacturing of heavy plate products. This work reports on the research results of machining quality of the workpiece in the plasma arc cutting on the low carbon low alloy steel. An experimental investigation of the characteristics of machining accuracy and surface integrity was carried out for basic machining parameters (cutting speed, arc current, arc voltage, plasma gas pressure, stand-off distance and nozzle diameter). The kerf geometry was determined with three accuracy parameters (top kerf width, bottom kerf width and kerf taper angle). The parameters of deviation present due to plasma curvature were defined by drag and pitch of drag line. The surface roughness was determined with two main roughness parameters through scanning the surface topography (roughness average and maximum height of the profile). The surface properties were determined over microstructure in heat affected zone (HAZ). The results show an acceptable machining quality of the PAC, so that this process is an excellent choice for fast and efficient material removal. However, the plasma arc cutting is not suitable for the final machining because of the metallurgical variations in the HAZ.

Research on Modeling of Cutting Wire Deflection of Multi-Wire Saw

2009 ◽  
Vol 69-70 ◽  
pp. 343-347
Author(s):  
R. Tang ◽  
Y.X. Dai ◽  
Y.B. Zhang ◽  
Ju Long Yuan ◽  
Wan Li Xiong
Keyword(s):  
Numerical Solutions ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Wire Tension ◽  
Feed Force ◽  
Initial Stage ◽  
Wire Saw ◽  
Diameter Ingot ◽  
Wire Deflection

The deflection of cutting wire on multi-wire saw is determined by cutting wire tension, diameter ingot feed force and some other factors, and it affects the quality of silicon wafers greatly. In this paper, the initial stage of cutting process is analyzed and modeled with three ODEs. Then the numerical solutions are solved by finding out the BVPs of each ODE. The numerical solutions showed the relationship between the deflection and the cutting parameters such as cutting wire tension, diameter and ingot feed force. This method is helpful for the further research of modeling the entire cutting process.

scholarly journals Comparison of laser beam, oxygen and plasma arc cutting methods in terms of their advantages and disadvantages in cutting structural steels

2021 ◽  
Vol 2130 (1) ◽  
pp. 012022
Author(s):  
G Írsel ◽  
B N Güzey
Keyword(s):  
Laser Beam ◽  
Metal Cutting ◽  
Cost Effective ◽  
Cutting Process ◽  
Oxygen Mixture ◽  
Plasma Cutting ◽  
Plasma Arc ◽  
Setup Cost ◽  
Plasma Arc Cutting ◽  
Advantages And Disadvantages

Abstract The laser beam, plasma arc, and oxygen cutting methods are widely used in metal cutting processes. These methods are quite different from each other in terms of initial setup cost and cutting success. A powered laser beam is used in laser beam cutting, plasma is used in plasma arc cutting, flammable gas - oxygen mixture is used in the oxygen cutting method. In this study, the cutting success of these methods was investigated on tensile specimens. Microstructure, hardness (HV 0.1), surface roughness, and strengths were investigated after the cutting process. The tensile test implemented with tensile samples cut from the same material by these three methods, it was observed that the strength values of the samples changed by about 8% in tensile strength depending on the cutting process. The hardness of the cut surfaces in plasma arc cutting increased from 150 HV to 230 HV for S235JR material. For this reason, it is difficult to perform machining operations after plasma cutting. The hardness value reached after laser beam cutting is 185 HV. Plasma arc cutting is more cost-effective than laser beam cutting. 1-3° vertical inclination (conicity) occurs on the cut surface in plasma arc cutting, while this inclination almost does not occur in laser cutting. In plasma cutting benches, cutting is done with oxygen, and in cutting with oxygen, the taper is seen in a small amount.

scholarly journals RESEARCH ON CUTTING THE PLASMA OF ALUMINIUM ALLOYS

2010 ◽  
Vol 2 (4) ◽  
pp. 83-87
Author(s):  
Mindaugas Jašinskas ◽  
Irmantas Gedzevičius ◽  
Giedrius Garbinčius ◽  
Justinas Gargasas
Keyword(s):  
Aluminium Alloys ◽  
Nonferrous Metals ◽  
Cutting Process ◽  
Plasma Cutting ◽  
Air Plasma ◽  
Speed Flow ◽  
The Given

The paper analyses the plasma cutting process of nonferrous metals. The influence of aluminium and modes of brass plates cut on the quality of the cut using air plasma are presented. The modes of plasma cutting counting differences in speed, flow, the tip of the angle and the distance between the shell and the cutting plate are analysed. According to the given results, dependences are proposed. A particular influence of the cut parameter on the quality of the cut is determined.

scholarly journals Pengaruh Variasi Kuat Arus Terhadap Lebar Pemotongan dan Kekerasan pada Baja Karbon Sedang dengan CNC Plasma Arc Cutting

2019 ◽  
Vol 4 (2) ◽  
pp. 99-104
Author(s):  
Riska Surya Agnitias ◽  
Rusiyanto Rusiyanto
Keyword(s):  
Carbon Steel ◽  
Electric Current ◽  
Medium Carbon Steel ◽  
Kerf Width ◽  
Cutting Process ◽  
Plasma Arc ◽  
Medium Carbon ◽  
Plasma Arc Cutting ◽  
Current Test ◽  
Current Variation

The purpose of this research is to determine the effects of current variation to the cutting kerf and hardness in medium carbon steel cutting process using CNC Plasma Arc Cutting. This research uses experimental methods to study the effect of a given treatment. The electric current was varied for 20, 25, 30, 35, and 40 amps. The test parameters were cutting kerf and hardness. The data were analyzed using descriptive statistics. The test result shows that there are differences in cutting kerf and hardness. The lowest kerf and hardness value was obtained from the 20 amps current, with a kerf of 1.64 mm and a hardness of 707.4 HV. The highest kerf and hardness value were obtained from the 40 amps current test, with a kerf of 2.58 mm and a hardness of 857.7 HV. This research concludes that the variation of electric current in CNC Plasma Arc Cutting process of medium carbon steel affects the kerf (99.59%) and hardness (94.17%). Tujuan penelitian ini adalah untuk mengetahui seberapa besar variasi kuat arus memberikan pengaruh terhadap lebar pemotongan (Kerf Width) dan kekerasan pada proses pemotongan baja karbon sedang dengan menggunakan CNC Plasma Arc Cutting. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dengan tujuan untuk mengetahui pengaruh sebab akibat terhadap perlakuan yang diberikan. Variasi kuat arus yang digunakan dalam proses pemotongan ini adalah 20 A, 25A, 30A, 35A, dan 40A. Pengujian yang di lakukan adalah kekerasan dan lebar pemotongan (Kerf Width). Data yang diperoleh kemudian dianalisis menggunakan teknik analisis statistik diskriptif. Hasil penelitian yang diperoleh menunjukkan bahwa terjadi perubahan nilai lebar pemotongan (Kerf Width) dan nilai kekerasan. Nilai lebar pemotongan (Kerf Width) dan kekerasan terendah diperoleh pada penggunaan arus sebesar 20 A yaitu dengan nilai lebar sebesar 1,64 mm dan kekerasan sebesar 707,4 HV. Nilai lebar pemotongan (Kerf Width) dan kekerasan tertinggi diperoleh pada penggunaan arus sebesar 40A dengan nilai lebar 2,58 mm dan kekerasan sebesar 857,7 HV.  Penelitian ini dapat disimpulakan bahwa variasi kuat arus pada proses pemotongan baja karbon sedang menggunakan CNC Plasma Arc Cutting memberi pengaruh sebesar 99,59% terhadap nilai lebar pemotongan (Kerf Width) dan sebesar 94,17% terhadap nilai kekerasan.

scholarly journals Influences on plasma cutting quality on CNC machine

2019 ◽  
Vol 2 (1) ◽  
pp. 108-117
Author(s):  
Lukas Kudrna ◽  
Jiri Fries ◽  
Marek Merta
Keyword(s):  
Cutting Speed ◽  
Sheet Thickness ◽  
Cutting Parameters ◽  
Plasma Source ◽  
Plasma Cutting ◽  
Plasma Arc ◽  
Cnc Machine ◽  
Electrically Conductive ◽  
Number Of Factors

Abstract This article discusses plasma cutting technology and its influences on the quality of the resulting cut. Plasma or a plasma arch consists of positive and negatively charged particles, excited and neutral atoms and molecules. As it contains free particles, it is electrically conductive and thus subject to the effects of the electrical and magnetic field. The basis of CNC machine design is described in the article, which has at least 3 axes (x, y, z), but there are also more technologically demanding applications, such as pipe cutting, profile and cutting using chamfer to prepare surfaces for welding, where these multi-axis devices are frequently used. The principle of plasma cutting and the plasma cutting phase is described in this article. The materials that can be divided by a plasma arc are described in detail, including graphs displaying the dependence of sheet thickness on the cutting speed. The article describes and lists the gases that are used in plasma-arc cutting, such as oxygen, argon, hydrogen and nitrogen. Important components of plasma cutting technology are the parameters that can be adjusted and set before the cutting so that the cut is of good quality. The most comprehensive chapter deals with the influences that affect plasma cutting quality. Cutting quality can be influenced by a number of factors. Everything starts with the proper choice of a CNC machine and a plasma source. The quality also depends on the expertise and experience of the machine operator and the setting of the plasma cutting parameters. This issue of influences on the plasma cutting quality is based on long-term experience in the field of the thermal cutting process.

scholarly journals The influence of plasma gas on changes in chemical composition and structures during the cutting process

2021 ◽  
Vol 13 (3) ◽  
pp. 151-157
Author(s):  
Agnieszka Rzeźnikiewicz ◽  
◽  
Jacek Górka ◽  
Keyword(s):  
Liquid Metal ◽  
Chemical Elements ◽  
Hydrogen Plasma ◽  
Cutting Process ◽  
Material Structure ◽  
Chemical Compositions ◽  
Plasma Cutting ◽  
Plasma Arc ◽  
Air Plasma ◽  
Plasma Arc Cutting

Cutting is usually one of initial and basic operations of the manufacturing process of welded structures and realization constructions elements. Thermal cutting, in particular plasma arc cutting is often used to prepare elements. The plasma arc cutting process involves melting and ejecting the liquid metal from the cutting gap with a highly concentrated plasma electric arc which is generated between the non-consuable electrode and the workpiece. The paper presents the results of research on the influence of plasma gas on structural changes and chemical compositions changes resulting unalloyed steel cutting by air plasma arc. It was shown that in the air plasma arc cutting process the amorphous layer with a very high nitrogen content (about 1.6%) and a hardness of 750 HV 0.2 was used. This high nitriding effect is due to the diffusion of nitrogen from the plasma gas. As a result of the interaction of air plasma arc gases on the liquid metal, the cutting surface is carburized (about 0.5%). The alloy components are also burnt according to the theory of selective oxidation of chemical elements. The material structure after the air plasma cutting process shows the structures between the structure formed after oxygen cutting processs and nitrogen plasma cutting process. The process of argon-hydrogen plasma cutting has the least influence on the cut material.

COMPARISON OF MODELING TECHNIQUES FOR SELECTING OPTIMIZED AND AUTOMATED PLASMA CUTTING PROCESS PARAMETERS

2012 ◽  
Vol 03 (03) ◽  
pp. 1250011
Author(s):  
M. SENTHIL KUMAR ◽  
B. DHANASEKAR ◽  
G. RANGA JANARDHANA ◽  
S. PARAMASIVAM ◽  
K. S. JAYA KUMAR
Keyword(s):  
Process Parameters ◽  
Polynomial Regression ◽  
Cost Effective ◽  
Cutting Parameters ◽  
Industrial Applications ◽  
Cutting Process ◽  
Plasma Cutting ◽  
Optimal Setting ◽  
Cutting Operation ◽  
User Friendly

The advancement in technologies made the entire manufacturing system, to be operated with more efficient, flexible, user friendly, more productive and cost effective. One such a system to be focused for advancement is plasma cutting system, which has wider industrial applications. There are many researches pursuing at various area of plasma cutting technology, still the automated and optimized parameters value selection is challenging. The work is aimed to eliminate the manual mode of feeding the input parameters for cutting operation. At present, cutting parameters are fed by referring the past cut data information or with the assistance of experienced employers. The cutting process parameters selections will have direct impact on the quality of the material being cut, and life of the consumables. This paper is intended to automate the process parameters selection by developing the mathematical model with existing cutting process parameters database. In this, three different approaches, multiple regression, multiple polynomial regression and AI technique, are selected and analyzed with the mathematical relations developed between the different cutting process parameters. The accuracy and reliability of those methods are detailed. The advantage and disadvantage of those methods for optimal setting conditions are discussed. The appropriate method that can be preferred for automated and optimal settings are elucidated. Finally, the selected technique is checked for accuracy and reliability for the existing cut data.

scholarly journals Influence of plasma torch design on cutting quality during precision air-plasma cutting of metal

2020 ◽  
Vol 63 (2) ◽  
pp. 155-162
Author(s):  
S. V. Anakhov ◽  
B. N. Guzanov ◽  
A. V. Matushkin ◽  
N. B. Pugacheva ◽  
Ya. A. Pykin
Keyword(s):  
Plasma Torch ◽  
Dynamic Stabilization ◽  
Quality Analysis ◽  
Metallographic Analysis ◽  
Plasma Cutting ◽  
Plasma Arc ◽  
09G2s Steel ◽  
Plasma Torches ◽  
Gas Dynamic

Optical interferometry and metallographic analysis were used to study structure of cutting seams obtained after 09G2S steel cutting by PMVR-5 plasma torch. These plasma torches have a number of design features in the system of gas-dynamic stabilization of plasma arc. It is shown that application of new plasma torch allows obtaining higher quality of cutting 09G2S steel of medium thickness with high productivity and lower energy costs. Metallographic analysis has shown that qualitative composition of the cut surface structure is almost the same, so priority criteria for comparative quality analysis are parameters of surface microgeometry. Evaluation of this parameter shows high quality of cutting almost along the entire length of a cut, since the influence of technological features of plasma arc cut into the metal affects at a distance of less than 0.3 mm from the edge of the sheet. The use of additional methods of gas-dynamic stabilization in PMVR -5.2 plasma torch (feed symmetry with a double swirl system of plasma-forming gas) allows to achieve additional advantages in terms of surface quality compared to PMVR -5.1. A number of features that affects quality of cut when cutting metals of different thicknesses for welding, is noted depending on the angle of inclination of plasma torch during cutting. Estimates of the surface layer hardness indicate minimal deviations from the requirements of GAZPROM Standard 2-2.4-083 (instructions on welding technologies in the construction and repair of field and main gas pipelines), which allows further use of cutting seams obtained by studied plasma torches for welding without removing zones of thermal influence. Thus, application of new plasma torches makes possible precision finishing plasma cutting of metals, including production of welded joints.

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