Design Optimization of Machining Parameters for AWJ Turning Operations of 718 Inconel Super alloy Based on the Taguchi

Authors : Fuat KARTAL

Pages : 148-156

Doi:10.29137/umagd.419669

View : 13 | Download : 7

Publication Date : 2017-01-29

Article Type : Research Paper

Abstract :Normal 0 false false false TR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:`Table Normal`; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:``; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:`Calibri`,sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:`Times New Roman`; mso-bidi-theme-font:minor-bidi; mso-ansi-language:TR;} Inconel Alloy 718 super alloy was machined using abrasive water jet insert ignore into journalissuearticles values(AWJ); in this study.   Following the cutting process, average surface roughness insert ignore into journalissuearticles values(Ra µm); and material removal rate insert ignore into journalissuearticles values(MRR); were investigated and operating parameters were optimized using Taguchi method. Among the machining parameters were pump pressure insert ignore into journalissuearticles values(PP); insert ignore into journalissuearticles values(200, 350 MPa);, nozzle feed rate insert ignore into journalissuearticles values(NFR); insert ignore into journalissuearticles values(5, 105 and 205 mm/min);; abrasive flow rate insert ignore into journalissuearticles values(AFR); insert ignore into journalissuearticles values(50, 200 and 350 g/min);; spindle speed insert ignore into journalissuearticles values(SS); insert ignore into journalissuearticles values(25, 50 and 75 RPM); and standoff distance insert ignore into journalissuearticles values(SOD); insert ignore into journalissuearticles values(2, 8 and 14 mm);.   Taguchi L18 insert ignore into journalissuearticles values(21 x34); orthogonal factorial experiment organization is adopted as experiment design. The effect of parameters on Ra and depth of cut insert ignore into journalissuearticles values(DoC); was investigated statistically using the outcomes of the variance analysis and S/N rates.   As a result of the empirical studies, PP proved to have the highest effect on Ra by 42.35%. On the other hand, NFR proved to have the highest effect on DoC by 72.85%. Increasing SS has improved Ra value while increasing DoC.
Keywords : Material Removal Rate, Inconel, Taguchi, Surface Roughness and Water Jet Turning