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Quenching Media Based Thermal Explorations over Spindle in High Speed CNC Machining Centres
Kuldeep Verma,
Rajendra M. Belokar
Issue:
Volume 1, Issue 2, June 2017
Pages:
26-30
Received:
9 March 2017
Accepted:
30 March 2017
Published:
15 May 2017
DOI:
10.11648/j.ajmme.20170102.11
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Abstract: Thermal growth in spindles acting as a barrier in high speed machining technology. As speed of spindle increases, simultaneously heat generated at the tool-work-piece contact tends to elongate the spindle. This elongation effects accuracy and repeatability of high-speed machines. In this paper thermal growth of spindle neutralized upto maximum extent so as to enhance the performance of machines at higher speeds. This paper aims at studying the behavior of CNC machine tools spindle by utilizing different cooling medias like air, water, coolant, hydraulic oils of different grade and different refrigerants. Here, we have studied the behaviour of CNC machine tools spindle by utilizing different cooling medias like air, water, coolant, hydraulic oils of different grade and different refrigerants to reduce thermal growth. First, spindle rotated at various speed cooled by forced air. Second, spindle cooled with water Third, spindle cooled with coolant. Fourth, rotating spindle cooled with hydraulic oils having different viscosity i.e. 23 nos. and 68 nos. Fifth, spindle cooled with different refrigerants i.e. R-134 a and R-717. Finally, an analytical study along with experimental investigations carried out to prove out the validity of the proposed model.
Abstract: Thermal growth in spindles acting as a barrier in high speed machining technology. As speed of spindle increases, simultaneously heat generated at the tool-work-piece contact tends to elongate the spindle. This elongation effects accuracy and repeatability of high-speed machines. In this paper thermal growth of spindle neutralized upto maximum exte...
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Development of a Carbon Fibre Reinforced Polymer for Exhaust Pipe of Two Stroke Engine
Asha Saturday,
Ogah Anthony Olukayode,
Emmanuel Saturday Odomagah,
Okorun Ambrose Ali,
Okocha Godstime Obiajulu
Issue:
Volume 1, Issue 2, June 2017
Pages:
31-43
Received:
13 March 2017
Accepted:
14 April 2017
Published:
2 June 2017
DOI:
10.11648/j.ajmme.20170102.12
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Abstract: Engine noise production performance is strongly dependent on gas dynamic phenomena and hardness of the material of the exhaust systems. Careful design of the manifolds enables the engineer to manipulate these characteristics but none has treated a way to damp these vibration and its frequencies. Solidworks 2014 and Ansys workbench 4.0 are used to investigate thermal and modal analysis on a heat resistant 40% carbon glass fibre reinforced polyester resin. The steady state analysis in fig. (3), shows a temperature distribution of 193.1°C, total heat flux of 30737(W⁄m2) and a direction heat flux 18565(W⁄m2). Considering the transient heat analysis a temperature distribution 139.59°C, total heat flux of 170370(W⁄m2) and a direction heat flux 108810(W⁄m2). The modal analysis reveals a displacement of 1.4939m at 6.7011Hz in x-axis direction depicting the direction of the exhaust gas emission.
Abstract: Engine noise production performance is strongly dependent on gas dynamic phenomena and hardness of the material of the exhaust systems. Careful design of the manifolds enables the engineer to manipulate these characteristics but none has treated a way to damp these vibration and its frequencies. Solidworks 2014 and Ansys workbench 4.0 are used to i...
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Development of a Multi Feed Pelletizer for the Production of Organic Fertilizer
Ilesanmi Afolabi Daniyan,
Omokhuale Marcus Akhere
Issue:
Volume 1, Issue 2, June 2017
Pages:
44-48
Received:
13 March 2017
Accepted:
15 April 2017
Published:
2 June 2017
DOI:
10.11648/j.ajmme.20170102.13
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Abstract: Organic fertilizer is the end product obtained by converting organic wastes such as crop residue, urban waste, poultry dropping and animal dung etc. into a useable fertilizer by composting. In this study, a screw type multi feed pelletizing machine was designed and fabricated. The machine essentially consists of a single phase 3 kW electric motor, 50 mm shaft, screw auger, pelletizer barrel, ball bearing, pulley, 8 mm thick V-belt. The dimension of the machine frame is 800 × 500 × 600 mm. The shaft transmits motion by means of a 3 kW electric motor. The output pellet was formed by compacting the compost through a die opening by a mechanical process. The performance of the machine was based on pelleting efficiency, percentage recovery and throughput capacity of the machine, which was determined at three different mesh sizes; 6 mm, 4 mm and 2 mm. The total mass of pellets was observed to increase as mesh size increases, hence pelleting efficiency increases as mesh sizes increases.
Abstract: Organic fertilizer is the end product obtained by converting organic wastes such as crop residue, urban waste, poultry dropping and animal dung etc. into a useable fertilizer by composting. In this study, a screw type multi feed pelletizing machine was designed and fabricated. The machine essentially consists of a single phase 3 kW electric motor, ...
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Analytical and Numerical Modeling of Hot Machining of Inconel 718
Issue:
Volume 1, Issue 2, June 2017
Pages:
49-57
Received:
13 March 2017
Accepted:
8 April 2017
Published:
2 June 2017
DOI:
10.11648/j.ajmme.20170102.14
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Abstract: The comparison of an analytical and numerical method to calculate the plastic strain, shear angle, and chip tool contact length in hot machining of Inconel 718 using flame heating has been discussed in the present study. The workpiece was heated with the combination of liquid petroleum gas along with oxygen gas. Merchant analytical model has been utilized for calculation of plastic strain, shear angle, while Sutter model is used for chip-tool contact length. DEFORM software has been used to find out the chip-tool contact length (L), shear angle (Φ), shear strain (ε) in the numerical model. It was observed that shear angle and chip tool contact length increased and plastic strain decreased with the increase of cutting speed and feed rate. From the numerical study, a good correlation was found for shear angle, chip tool contact length with the analytical model.
Abstract: The comparison of an analytical and numerical method to calculate the plastic strain, shear angle, and chip tool contact length in hot machining of Inconel 718 using flame heating has been discussed in the present study. The workpiece was heated with the combination of liquid petroleum gas along with oxygen gas. Merchant analytical model has been u...
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