Influence of machining parameters on surface texture and material removal rate of Inconel 718 after electrical discharge machining assisted with ultrasonic vibration

Nowicki, Rafał; Świercz, Rafał; Oniszczuk-Świercz, Dorota; Dąbrowski, Ł.; Kopytowski, Adrian

doi:10.1063/1.5056282

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…The process can be characterized by a large number of parameters. Among the most important are discharge time, voltage and current, polarization of electrodes, size and rinsing conditions of the working gap [ 94 , 98 ]. When machining Inconel 718, surface roughness of approximately Ra = 8.5 um with material removal rate of 18.61 mm 3 /min can be obtained (In electrical discharge machining (EDM) of Inconel 718 by using copper electrode at higher peak current and pulse duration).…”

Section: Methods Of Manufacturing Fir Tree Slots Of the Turbine Discsmentioning

confidence: 99%

The Review of Current and Proposed Methods of Manufacturing Fir Tree Slots of Turbine Aero Engine Discs

2023

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This review article presents a summary of currently used and proposed methods of manufacturing fir tree slots of discs in turbine engines. The production of aircraft, including aircraft engines during times of overlapping global economic crises related to the COVID-19 pandemic or the war in Eastern Europe requires a quick response to the changing numbers of passengers and cargo. Similarly, the aviation industry must adapt to these conditions, and thus utilize flexible production methods allowing for a quick change in the design or type of a given part. Due to the constant adoption of new materials for the most critical aero engine parts and the necessity of complying with environmental regulations, it is necessary to search for new methods of manufacturing these parts, including fir tree slots. As an alternative to currently used expensive and energy-intensive broaching, many manufacturers try to implement creep feed grinding CFG or contour milling. However, other manufacturing methods, thus far rarely used for crucial machine parts such as WEDM, ECDM or AWJ, are gaining more and more popularity in the aviation industry. This article presents the advantages and shortcomings of these methods in the context of manufacturing fir tree slots.

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Section: Methods Of Manufacturing Fir Tree Slots Of the Turbine Discsmentioning

confidence: 99%

The Review of Current and Proposed Methods of Manufacturing Fir Tree Slots of Turbine Aero Engine Discs

2023

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“…The used plan includes experiments in stellar arms, which are equally spaced on each axis by +/-α (Table I). The plan was completed by three repetitions at the central point (0,0,0) [3,4]. A schematic plan of the experiment is shown in Figure 1.…”

Section: The Course Of the Experiments And Research Methodologymentioning

confidence: 99%

Influence of machining parameters on surface texture of Inconel 718 after grinding with multi-granular wheels

et al. 2019

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Requirements currently imposed on machine elements are constantly growing. It requires to develop new, advanced machining processes. One of the commonly used finishing process is grinding. The article presents the results of the exploratory research in the process of surface grinding with abrasive multigrain wheels of samples made of Inconel 718. The influence of input parameters was investigated: cutting speed Vc, transverse feed speed Fp, longitudinal feed speed Fw, on roughness parameters (Sa) and the bearing capacity curve. Based on the conducted research, statistical models of the grinding process were elaborated, which allow to select the most favorable processing parameters depending on the required quality of the surface texture.

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“…Evans et al [ 4 ] suggested that the presence of the elements C, Cr, Mo, and Nb increases the mechanical and thermal properties of the material. The studies undertaken by researchers are mainly focused on shaping the geometry, based on the use of unconventional machining technologies such as EDM [ 5 , 6 , 7 ], electrochemical machining [ 8 , 9 ], or hybrid machining [ 10 , 11 ]. An integral part of technology development is also the use of finishing treatments in the process of shaping a specific state of the surface layer [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of a New Type of Grinding Wheel with Multi-Granular Abrasive Grains on Surface Topography Properties after Grinding of Inconel 625

et al. 2023

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Finishing operations are one of the most challenging tasks during a manufacturing process, and are responsible for achieving dimensional accuracy of the manufactured parts and the desired surface topography properties. One of the most advanced finishing technologies is grinding. However, typical grinding processes have limitations in the acquired surface topography properties, especially in finishing difficult to cut materials such as Inconel 625. To overcome this limitation, a new type of grinding wheel is proposed. The tool is made up of grains of different sizes, which results in less damage to the work surface and an enhancement in the manufacturing process. In this article, the results of an experimental study of the surface grinding process of Inconel 625 with single-granular and multi-granular wheels are presented. The influence of various input parameters on the roughness parameter (Sa) and surface topography was investigated. Statistical models of the grinding process were developed based on our research. Studies showed that with an increase in the cutting speed, the surface roughness values of the machined samples decreased (Sa = 0.9 μm for a Vc of 33 m/s for a multigranular wheel). Observation of the grinding process showed an unfavorable effect of a low grinding wheel speed on the machined surface. For both conventional and multigranular wheels, the highest value for the Sa parameter was obtained for Vc = 13 m/s. Regarding the surface topography, the observed surfaces did not show defects over large areas in the cases of both wheels. However, a smaller portion of single traces of active abrasive grains was observed in the case of the multi-granular wheel, indicating that this tool performs better finishing operations.

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Influence of machining parameters on surface texture and material removal rate of Inconel 718 after electrical discharge machining assisted with ultrasonic vibration

Cited by 12 publications

References 20 publications

The Review of Current and Proposed Methods of Manufacturing Fir Tree Slots of Turbine Aero Engine Discs

The Review of Current and Proposed Methods of Manufacturing Fir Tree Slots of Turbine Aero Engine Discs

Influence of machining parameters on surface texture of Inconel 718 after grinding with multi-granular wheels

Effects of a New Type of Grinding Wheel with Multi-Granular Abrasive Grains on Surface Topography Properties after Grinding of Inconel 625

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