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Öğe Effect of abrasive water jet turning parameters on depth of cut of AISI 1050 steel(BHR Group Limited, 2014) Kartal, F.; Gökkaya, H.This study analyzes the depth of cut as an output of experiments using abrasive water jet turning (AWJT) on AISI 1050 steel material and machining parameters were optimized using Taguchi method. Three different nozzle feed rates (0.01, 0.017 and 0.09 mm/min), abrasive mass flow rates (50, 200 and 350 g/min), lathe spin rates (500, 1500 and 2500 rpm), nozzle distances (2,10 and 18 mm) and two different nozzle diameters (0.75 and 1.3 mm) were used as machining parameter values. Taguchi's LI8 orthogonal array was adopted for the test design. The impact of parameters on depth of cut was statistically examined using analysis of variance and S/N ratios obtained. As a result of the tests, Nozzle feed rate proved to have the highest impact on the depth of cut with its rate of 75.38%. Using a 0.75 mm nozzle diameter led to decreased depth of cut. Increasing the spindle speed proved to increase the depth of cut. © BHR Group 2014 Water Jetting 22.Öğe The effect of cutting parameters on cutting force during the processing of inconel 718 super alloy(2007) Tasliyan, A.; Acarer, M.; Seker, U.; Gökkaya, H.; Demir, B.In this study, the effects of cutting parameters such as cutting speed, feed rate and cutting depth over cutting forces have been investigated. For this purpose, nickel based super alloy Inconel 718 has been processed with ceramic cutting tool having 1.2 mm insert radia on a digitally controlled turning lathe (CNC) without using cooling water. Different cutting processes having the values of five different cutting speeds (225, 300, 350, 400, 500 m/dak) and five different feed rates (0.05, 0.075, 0.1, 0.125, 0.15 mm/rev) and two different cutting depths (1mm, 2mm) have been implemented. In the experiments, the lowest main cutting force was obtained as (A-1-V) 192 N in 500 m/min cutting speed, 0.05 mm/rev feed rate speed and 1 mm depth of cut, the highest main cutting force was obtained as (B-5-I) 780 N in 225 m/min cutting speed, 0.15 mm/rev feed rate speed and 2 mm depth of cut.Öğe The effects of machining parameters on cutting forces, surface roughness, built-up edge (BUE) and built-up layer (BUL) during machining AA2014 (T4) alloy(2010) Gökkaya, H.Tool wear, formed in cutting tool during machining processes, affects the surface roughness of the work piece, cutting forces and other output parameters. The effects of the machining parameters cutting speed (Vc) and the feed rate (f) on built-up edge (BUE), built-up layer (BUL), main cutting force (Fc), and surface roughness (Ra) is investigated in this study. The effects of the cutting parameters on cutting force and surface roughness has been examined by the use of Variance Analysis (ANOVA); and their optimum and critical cutting parameters were determined accordingly. AA2014 aluminum alloy was machined with uncoated carbide tools using Computer Numerical Control (CNC) turning machine under dry cutting conditions. Four different cutting speeds (200 m/min, 300 m/min, 400 m/min, and 500 m/min), five different feed rates (0.10 mm/rev, 0.15 mm/rev, 0.20 mm/rev, 0.25 mm/rev, and 0.30 mm/rev) and a constant depth of cut were selected as the machining parameters. BUE and BUL in the cutting tool were formed most at cutting speed 200 m/min and feed rate 0.30 mm/rev. The lowest cutting force was determined as 137 N at cutting speed 500 m/min and feed rate 0.10 mm/rev. The lowest average surface roughness, however, was determined as 0.93 ?m at 500 m/min cutting speed and feed rate 0.10 mm/rev. © 2010 Journal of Mechanical Engineering. All rights reserved.Öğe IMPROVEMENT OF SIEVE PANELS USED IN BURNT LIMESTONE SCREENING SYSTEM AT KARDEMIR A.Ş. LIME PLANTS(Baski, 2022) Nakas, E.; Cantürk, C.; Esin, F.; Acur, O.; Sevim, M.; Gökkaya, H.Nowadays, industrial factories attach great importance to suggestions and improvement studies in their facilities in order to reduce production costs and increase their competitiveness. Approximately 1.9 billion tons of steel is produced every year in the world and 60% of this amount is obtained from blast furnaces. Burnt limestone is used to remove impurities in the liquid steel during the steel production process of KARDEMİR A.Ş. integrated iron and steel factory. The size of burnt limestone over 50 mm is important for homogeneous dissolution in liquid steel. The breaks in the steel-based sieve panels used in the sizing of the burnt limestone cause the burnt limestone not to be dimensioned properly and cause negativity on the production stops, occupational health and safety issues. In this study, instead of steel based sieve panels, rubber based sieve panels with the same sizing area are used. Along with the improvement made by using rubber-based sieve panels, the production stops caused by the break and break in the panels during the sizing process of burnt limestone, occupational health and safety risks experienced during the replacement of sieve panels were prevented. © IMCET 2022. All rights reserved.
