Sanda Maria Bangu (ILII) - Academia.edu (original) (raw)
Papers by Sanda Maria Bangu (ILII)
AIP Conference Proceedings, 2016
The plasma beam cutting is a machining method applied in order to detach parts or workpieces from... more The plasma beam cutting is a machining method applied in order to detach parts or workpieces from plate type workpiece. Essentially, a plasma jet is sent to workpiece, determining melting, vaporizing and removing of the material from the workpiece. If there is a relative movement between the plasma jet and the workpiece, a kerf gradually appears. Many factors exert influence on the kerf characteristics. A full factorial experiment with three independent variables at two levels was designed, in order to highlight the influence exerted by the cutting speed, workpiece thickness and arc current on the kerf width in the superior and inferior zones and on the kerf taper angle, respectively. Power type empirical mathematical models were determined by mathematical processing of the experimental results.
Nonconventional Technologies Review, Mar 31, 2017
Distinct cutting methods could be applied to separate parts from a plate workpiece. Nowadays, amo... more Distinct cutting methods could be applied to separate parts from a plate workpiece. Nowadays, among such methods, the thermal plasma allows obtaining a relatively narrow slot, a high cutting speed and a cut surface appreciated as acceptable in certain situations. Essentially, the thermal plasma is generated by sending a gas through the electric discharge developed between the central electrode and the nozzle, as components of the plasma generator. The analysis of plasma cutting process showed that there are some groups of actors able to affect the heights of asperities generated by the cutting process on the cut surface. A full factorial experiment with three independent variables at two levels was designed and achieved by considering some of process input factors whose values could be easier modified, to investigate their influence on the value of the Ra surface roughness parameter. By processing the experimental results, a power type function was determined. The analysis of this empirical mathematical model and of the elaborated graphical representations highlighted the influence exerted by the cutting speed, plate workpiece thickness and current intensity on the Ra surface roughness parameter.
This paper present some experimental results concerning the surface roughness variation at plasm ... more This paper present some experimental results concerning the surface roughness variation at plasm a arc cutting, in case of processing a stainless steel wo rkpiece. Thus, some experimental tests were made in an indus trial enterprise, on a CNC plasma cutting equipment, KOMPACT3015-HPR130 , in order to analyze the surface roughness parameter obtained during the cutting pro cess. In order to establish an empirical model of the sur face roughness obtained during the plasma cutting proces s the experimental tests were made using different cuttin g conditions. To measure the surface roughness, we us ed the HANDYSURF E-35A/B apparatus that exist in the Department of Machine Manufacturing Technology witc h allows measuring of 18 types of surface roughness parameters. In this paper, we used only the Ra surface roughness parameter in order to be studied. Due to the fact that this apparatus can be connecting to a computer , th profile of the machined surface could also be analy zed.
AIP Conference Proceedings, 2016
The plasma beam cutting is a machining method applied in order to detach parts or workpieces from... more The plasma beam cutting is a machining method applied in order to detach parts or workpieces from plate type workpiece. Essentially, a plasma jet is sent to workpiece, determining melting, vaporizing and removing of the material from the workpiece. If there is a relative movement between the plasma jet and the workpiece, a kerf gradually appears. Many factors exert influence on the kerf characteristics. A full factorial experiment with three independent variables at two levels was designed, in order to highlight the influence exerted by the cutting speed, workpiece thickness and arc current on the kerf width in the superior and inferior zones and on the kerf taper angle, respectively. Power type empirical mathematical models were determined by mathematical processing of the experimental results.
Nonconventional Technologies Review, Mar 31, 2017
Distinct cutting methods could be applied to separate parts from a plate workpiece. Nowadays, amo... more Distinct cutting methods could be applied to separate parts from a plate workpiece. Nowadays, among such methods, the thermal plasma allows obtaining a relatively narrow slot, a high cutting speed and a cut surface appreciated as acceptable in certain situations. Essentially, the thermal plasma is generated by sending a gas through the electric discharge developed between the central electrode and the nozzle, as components of the plasma generator. The analysis of plasma cutting process showed that there are some groups of actors able to affect the heights of asperities generated by the cutting process on the cut surface. A full factorial experiment with three independent variables at two levels was designed and achieved by considering some of process input factors whose values could be easier modified, to investigate their influence on the value of the Ra surface roughness parameter. By processing the experimental results, a power type function was determined. The analysis of this empirical mathematical model and of the elaborated graphical representations highlighted the influence exerted by the cutting speed, plate workpiece thickness and current intensity on the Ra surface roughness parameter.
This paper present some experimental results concerning the surface roughness variation at plasm ... more This paper present some experimental results concerning the surface roughness variation at plasm a arc cutting, in case of processing a stainless steel wo rkpiece. Thus, some experimental tests were made in an indus trial enterprise, on a CNC plasma cutting equipment, KOMPACT3015-HPR130 , in order to analyze the surface roughness parameter obtained during the cutting pro cess. In order to establish an empirical model of the sur face roughness obtained during the plasma cutting proces s the experimental tests were made using different cuttin g conditions. To measure the surface roughness, we us ed the HANDYSURF E-35A/B apparatus that exist in the Department of Machine Manufacturing Technology witc h allows measuring of 18 types of surface roughness parameters. In this paper, we used only the Ra surface roughness parameter in order to be studied. Due to the fact that this apparatus can be connecting to a computer , th profile of the machined surface could also be analy zed.