The Experts below are selected from a list of 384 Experts worldwide ranked by ideXlab platform
R Subramanian - One of the best experts on this subject based on the ideXlab platform.
-
study of parametric optimization of Burr formation in step drilling of eutectic al si alloy gr composites
Journal of materials research and technology, 2014Co-Authors: Palanisamy Shanmughasundaram, R SubramanianAbstract:a b s t r a c t In this study, the effect of the step drill’s geometries such as step angle, step size and cutting parameters such as feed and spindle speed on the Exit Burr height was investigated for Burr minimization in drilling of Al–Gr composites which are fabricated through squeeze casting method. The experimental study was conducted as per the L27 orthogonal array of Taguchi method to find the optimum drilling parameters, and analysis of variance (ANOVA) was performed to investigate the influence of parameters on the Burr height of composites during drilling. Confirmation tests were conducted to validate the test results. Results revealed that feed, step angle, step size and spindle speed were the significant parameters in the formation of Exit Burr. © 2014 Brazilian Metallurgical, Materials and Mining Association. Published by Elsevier Editora Ltda.
Saiful Hadi Yullah - One of the best experts on this subject based on the ideXlab platform.
-
PENGARUH SPINDLE SPEED DAN FEED RATE TERHADAP PEMBENTUKAN Burr DAN KEAKURASIAN DIMENSI LUBANG PADA MATERIAL KUNINGAN MENGGUNAKAN TEKNOLOGI MICRO-DRILL MACHINING
'Fakultas Teknik Elektronika dan Komputer Universitas Kristen Satya Wacana', 2018Co-Authors: Saiful Hadi YullahAbstract:Teknologi pemesinan, khususnya untuk kasus penggurdian lubang micro menjadi tantangan tersendiri dalam dunia industri untuk memenuhi permintaan komponen yang memiliki dimensi micro. Tujuan dari penelitian ini adalah mengukur keakurasian dimensi (kebulatan) serta pembentukan Burr dibagian entrance dan Exit lubang. Objek material yang digunakan adalah plat kuningan. Lempengan kuningan dengan ketebalan 0.5 mm akan digurdi menggunakan mata pahat twist drill diameter 0,2 mm berbahan material tungsten carbide. Kecepatan putaran spindle yang divariasikan adalah 14.000 rpm, 17.000 rpm, dan 20.000 rpm. Variasi feed rate untuk masing-masing putaran spindle adalah 5 mm/min, 8 mm/min, dan 10 mm/min. Lubang hasil penggurdian akan diamati dan diukur dengan menggunakan stereo microscope. Dari hasil pengukuran menunjukkan bahwa ukuran dimensi lubang terbesar dengan nilai 0.217 mm terbentuk pada putaran 14.000 rpm dan feed rate 5 mm/min, sedangkan diameter lubang terkecil dengan nilai 0.202 mm terbentuk pada putaran 20.000 rpm dan feed rate 10 mm/min. Nilai entrance Burr tertinggi yaitu 0,050 mm terbentuk pada putaran 17.000 rpm dan feed rate 10 mm/min, sedangkan ketinggian terendahnya yaitu 0.038 mm terjadi pada putaran 14.000 rpm dan feed rate 5 mm/min. Nilai Exit Burr tertinggi yaitu 0,077 mm terbentuk pada putaran 17.000 rpm dan feed rate 10 mm/min, sedangkan ketinggian terendahnya yaitu 0.032 mm terbentuk pada putaran 14.000 rpm dan feed rate 5 mm/min. Hasil dari data penelitian ini menyimpulkan bahwa keakurasian dimensi lubang dan pembentukan Burr menjadi semakin baik seiring dengan bertambahnya nilai putaran spindle dan feed rate pemesinan.Banda Ace
-
PENGARUH SPINDLE SPEED DAN FEED RATE TERHADAP PEMBENTUKAN Burr DAN KEAKURASIAN DIMENSI LUBANG PADA MATERIAL KUNINGAN MENGGUNAKAN TEKNOLOGI MICRO-DRILL MACHINING
2026Co-Authors: Saiful Hadi YullahAbstract:Teknologi pemesinan, khususnya untuk kasus penggurdian lubang micro menjadi tantangan tersendiri dalam dunia industri untuk memenuhi permintaan komponen yang memiliki dimensi micro. Tujuan dari penelitian ini adalah mengukur keakurasian dimensi (kebulatan) serta pembentukan Burr dibagian entrance dan Exit lubang. Objek material yang digunakan adalah plat kuningan. Lempengan kuningan dengan ketebalan 0.5 mm akan digurdi menggunakan mata pahat twist drill diameter 0,2 mm berbahan material tungsten carbide. Kecepatan putaran spindle yang divariasikan adalah 14.000 rpm, 17.000 rpm, dan 20.000 rpm. Variasi feed rate untuk masing-masing putaran spindle adalah 5 mm/min, 8 mm/min, dan 10 mm/min. Lubang hasil penggurdian akan diamati dan diukur dengan menggunakan stereo microscope. Dari hasil pengukuran menunjukkan bahwa ukuran dimensi lubang terbesar dengan nilai 0.217 mm terbentuk pada putaran 14.000 rpm dan feed rate 5 mm/min, sedangkan diameter lubang terkecil dengan nilai 0.202 mm terbentuk pada putaran 20.000 rpm dan feed rate 10 mm/min. Nilai entrance Burr tertinggi yaitu 0,050 mm terbentuk pada putaran 17.000 rpm dan feed rate 10 mm/min, sedangkan ketinggian terendahnya yaitu 0.038 mm terjadi pada putaran 14.000 rpm dan feed rate 5 mm/min. Nilai Exit Burr tertinggi yaitu 0,077 mm terbentuk pada putaran 17.000 rpm dan feed rate 10 mm/min, sedangkan ketinggian terendahnya yaitu 0.032 mm terbentuk pada putaran 14.000 rpm dan feed rate 5 mm/min. Hasil dari data penelitian ini menyimpulkan bahwa keakurasian dimensi lubang dan pembentukan Burr menjadi semakin baik seiring dengan bertambahnya nilai putaran spindle dan feed rate pemesinan
Ramesh Singh - One of the best experts on this subject based on the ideXlab platform.
-
fe modeling of Burr size in high speed micro milling of ti6al4v
Precision Engineering-journal of The International Societies for Precision Engineering and Nanotechnology, 2017Co-Authors: Amrendra K Yadav, Vivek K Bajpai, Mohan Kumar, Nirmal Kumar Singh, Ramesh SinghAbstract:Abstract This article is focused on the finite element modeling of Burr formation in high speed micromilling of Ti6Al4V. Studies show that the Burr produced at the up milling side at the Exit of the micromilling tool is the biggest among Burrs at other locations. Therefore, side Exit Burr at the up milling side has been modeled through finite element modeling. Johnson cook material constitutive model has been implemented in the formulation of Burr formation. Experimental work has been performed to validate the developed model. It is found that the Burr height and width obtained from the simulation has been validated experimentally with a maximum error of 15%. It was found from the literature review that the cutting speed is the factor, which influences the Burr formation. Therefore, the model has been further extended to study the effect of cutting speed on the Burr size. A maximum tool rotation of 200,000 rpm was considered with a tool diameter of 500 μm. It is predicted from the simulation that, the Burr size was reduced by 96% (both height and width) if cutting tool speed was increased from 10,000 to 200,000 rpm. Therefore, it is concluded that the cutting speed is the major factor to reduce the Burr size in micromilling of Ti6Al4 V. This study shows that the high speed micromachining center can be helpful in producing the micro parts with less or no Burrs. It is expected that further extension of the Burr formation model can minimize the Burr size to zero/near zero size.
-
Burr height prediction of ti6al4v in high speed micro milling by mathematical modeling
Manufacturing letters, 2017Co-Authors: Pankaj Kumar, Vivek K Bajpai, Ramesh SinghAbstract:Abstract The current work is focused on high speed micro milling of Ti6Al4V. An analytical model has been developed to predict the Exit Burr height at high cutting speed. The model is validated at two cutting speeds: conventional (85 m/min) and high speed (141 m/min). Validation showed very small error in the prediction of Burr height. The error in prediction of Burr height was 3% and 7%. Further, the model was used to study effect of cutting speed on Burr height. The Burr height is reduced by 90% at 314 m/min compared to 79 m/min cutting speed.
-
Characterization and modeling of Burr formation in micro-end milling
Precision Engineering-journal of The International Societies for Precision Engineering and Nanotechnology, 2011Co-Authors: Ravi Lekkala, Vivek K Bajpai, Ramesh Singh, Suhas S JoshiAbstract:Abstract Mechanical micromachining is increasingly finding applications in fabrication of components in various fields, such as, biomedical devices, optics, electronics, medicine, communications and avionics. In order to ensure adequate functionality, there are stringent requirements for form and finish in case of biomedical devices like cochlear implants and metallic optics. This necessitates that the post machined surface must be Burr free. To address these issues in micromachining, this paper presents results of an experimental study to investigate the influence of main process parameters i.e. speed, feed rate, depth of cut, tool diameter and number of flutes on the formation of the various types of Burrs i.e. Exit Burrs and top Burrs produced during micro-end milling operation. The experiments performed using Taguchi method shows that three types of Burr formation mechanisms prevail during micro-end milling operations; these are: lateral deformation of material, bending and tearing of the chip. Also, three types of Burrs were observed include: Poisson Burr, rollover Burr in down milling and tear Burr in up milling. Further, it is observed that the depth of cut and the tool diameter are the main parameters, which influence the Burr height and thickness significantly. However, the speed and the feed rate have small to negligible effect on the Burr thickness and height. Besides the experimental analysis, the paper presents an analytical model to predict the Burr height for Exit Burr. The model is built on the geometry of Burr formation and the principle of continuity of work at the transition from chip formation to Burr formation. Note that prediction of Burr height in micro-end milling is extremely challenging due to the complex geometry of material removal and microstructural effects encountered during cutting at that length scales. The model fares well and the prediction errors range between 0.65 and 25%.
Palanisamy Shanmughasundaram - One of the best experts on this subject based on the ideXlab platform.
-
study of parametric optimization of Burr formation in step drilling of eutectic al si alloy gr composites
Journal of materials research and technology, 2014Co-Authors: Palanisamy Shanmughasundaram, R SubramanianAbstract:a b s t r a c t In this study, the effect of the step drill’s geometries such as step angle, step size and cutting parameters such as feed and spindle speed on the Exit Burr height was investigated for Burr minimization in drilling of Al–Gr composites which are fabricated through squeeze casting method. The experimental study was conducted as per the L27 orthogonal array of Taguchi method to find the optimum drilling parameters, and analysis of variance (ANOVA) was performed to investigate the influence of parameters on the Burr height of composites during drilling. Confirmation tests were conducted to validate the test results. Results revealed that feed, step angle, step size and spindle speed were the significant parameters in the formation of Exit Burr. © 2014 Brazilian Metallurgical, Materials and Mining Association. Published by Elsevier Editora Ltda.
Hui Tang - One of the best experts on this subject based on the ideXlab platform.
-
Exit Burr height mechanistic modeling and experimental validation for low frequency vibration assisted drilling of aluminum 7075 t6 alloy
Journal of Manufacturing Processes, 2020Co-Authors: Shaomin Li, Deyuan Zhang, Hui TangAbstract:Abstract The Burr influences the surface quality and the performance of the part. Nowadays, vibration-assisted drilling (VAD) is used to decrease the Exit Burr size. However, further analysis of the VAD Burr formation mechanism is required. A mathematical Burr prediction model of low-frequency VAD is proposed for the aluminum 7075-T6 alloy cutting. This model includes material deformation mechanisms, multi-region thrust force, and VAD kinematic characteristics. In the material deformation process of VAD, the Johnson-Cook model and fracture model are considered. The results indicate that the experimental Burr height is consistent with the model prediction values, and the deviation is less than 8%. The average Burr height of VAD decreases by 49.5 %–52.6 % compared with conventional drilling (CD). The parameter analysis shows that the vibration amplitude had the highest sensitivity to the Burr height. In the Multivariate regression analysis (MRA), the regression coefficient sum of vibration-related parameters’ absolute values (0.676) approximates the sum of other parameters’ absolute values (0.817).