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K. Mallikarjuna ¹, V. Veeranna ², K. Hemachandra Reddy ³

Affiliations
1 Department of Mechanical Engineering, Ballari Institute of Technology and Management, Bellary, Karnataka, IN
2 Department of Mechanical Engineering, Brindavan Institute of Technology and Science, Kurnool 518001, A.P., IN
3 Department of Mechanical Engineering, JNTU, Anantapur-515001, IN

Abstract

FMS’s seems to be a very promising technology as they provide flexibility, which is essential for many manufacturing companies. FMS can yield a number of dissimilar jobs simultaneously. Each part requires different operations in a certain sequence and workstations can typically perform a variety of operations. In this paper, multi-objective optimization related to FMS scheduling which act as a constraint in configuring the loop layout in optimum manner by various evolutionary algorithms such as Metaheuristics like PSO, SA etc. The first one is connected with batch scheduling problem (BSP). The next objective is emphasis on determination of optimum machine sequence with minimum total transportation cost. In this paper the authors made an attempt to consider machine arrangements in an optimum sequence with flexible batch scheduling as constraints in an FMS. The various loop layout problems are tested for enactment of objective function with respect to computational time and number of iterations involved in SA and PSO. A necessary code is generated in C++ and the code is run by the IDE tool in which C++ compiler used as plug in. The results of the above optimization algorithms are tabulated and it is concluded that for make span PSO is better than SA, whereas for total transportation cost SA is better than PSO.

Keywords

Flexible Manufacturing Systems, Particles Warm Method, Simulated Annealing, Transportation Cost.

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B. Ravikumar ¹, S. Gajanana ¹, K. Hemachandra Reddy ², K. N. Nigam ³

Affiliations
1 M V S R Engg. College, Nadergul, Hyderabad, IN
2 J N T U College of Engg, Anantapur, IN
3 Mechanical Engg Dept, M V S R Engg. College, Nadergul, Hyderabad, IN

Abstract

Metal forming involves deforming of metal plastically into various derived shapes and sizes under the effect of externally applied forces. Flow forming is an advanced, near net shape, chipless metal forming process, which employs an incremental rotary point deformation technique for manufacturing seamless, dimensionally precise, tubular and other rotationally symmetrical products. In shear forming process deformation is carried out by combination of axial and radial forces using a set of rollers thf coordinate retrieval system using AUTO LISP for bottle neck shaped inner shell cylinder of a missile which is used for a critical space application. The experimentation consists of two stages ,i.e. Flow turning of cone with 36º included angle fromat are simultaneously moved along the length of the rotating preform. The present paper discusses on development o input Size blank of 400 x 400 x 16mm and then Spinning of cone to inner shell cylinder by spinning (3 or 4 Passes). The earlier method of development of component was a manual feeding of coordinates. This involves painstakingly measuring distances in the CAD drawing with reference to the equipment, whose axes are at an angle of 120° to one another. This process of manual retrieval of coordinates to be entered require a laborious 18hrs of operator time for every new trial. Auto Lisp, a standard feature of AutoCAD, which enables us to introduce a special command with customized output. A standard program in Auto Lisp, which gives only the end points of a polyline, was re-written to give coordinates of points at every 1 mm. This developed system brings down operator time per cycle from 18hrs to less than 15 min. and also minimizes the human error. After successful execution of the program the coordinate values thus obtained are used for the development of prototype in copper alloy and also in the development of actual material.

Keywords

Metal Spinning, AUTO LISP , Co-Ordinate Retrieval System.

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P. Hari Sankar ¹, Y. V. Mohana Reddy ², K. Hemachandra Reddy ³

Affiliations
1 JNTUA, Ananthapuramu-515002, Andhra Pradesh, IN
2 Department of Mechanical Engineering, G. Pulla Reddy Engineering College, Nandyal Road, Kurnool-518007, Andhra Pradesh, IN
3 Department of Mechanical Engineering, Jawaharlal Nehru Technological College of Engineering Anantapur, Ananthapuramu-515002, Andhra Pradesh, IN

Abstract

In the present research a polymer blended hybrid nanocomposites are prepared by mixing of two polymers i.e. polyester and vinylester reinforced with carbon fibre and filled with nanoclay. Hybrid nanocomposites was loaded with different clay weight ratios such as 0, 2, 2.5, 3, 3.5, 4, 5, 6 wt.% using priniciple of hybrid mixtures. By using hand layup technique two different systems such as blend plus clay as the first system and blend plus carbon fibre plus nanoclay is the second system. Tensile strength and tensile modulus were studied on effect of clay loading and miscibility. It was observed that dispersion of clay was uniform and also interactions between fibre and blend were also significantly improved for the second system. Nanoclay wt.% was varied with respect to the blend. It was also observed that tensile strength was increased linearly from 0 wt.% to 3.5 wt.% and then decreases for the first system whereas for the second system linearly increases from the 0 wt.% to 4 wt.% and then decreases. Tensile modulus was optimised at 3.5 wt.% for first system and at 5 wt.% for second system and the reason were attributed that addition of clay increases the modulus but excess clay produces high viscosity that makes difficult to flow the modified mixture.

Keywords

Nanocomposites, Montmorrilonite Nanoclay, Polyester/ Vinylester Blend, Tensile Properties.

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K. Mallikarjuna ¹, A. Srinivas ¹, V. Veeranna ², K. Hemachandra Reddy ³

Affiliations
1 Dept of Mech. Engg., G. Pullaiah College of Engineering and Technology, Kurnool, A.P., IN
2 Dept of Mech. Engg, BITS, Kurnool, A.P., IN
3 Dept of ME, JNTU, Anantapur, A.P., IN

Abstract

Facility allocation and layout design plays a key role to achieve high revenue in current industrial sector. This paper conveys the design of single row layout in FMS in an optimum manner. The objective of single row layout problem is the allocation of the ordering of machines around the facility configuration, to reduce the total number of traversals for a part family. The clearance between the machines and material handling cost between the machines also considered in design of SR layouts. This work details the design, development and testing of Genetic Algorithm (GA), Partial Swarm Method(PSM) to solve the single row layout problems. The proposed methods validated and tested with randomly generated problem instances.

Keywords

Genetic Algorithm, Partical Swarm Method, FMS, SR.

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A. Raj Kumar ¹, G. Janardhana Raju ², K. Hemachandra Reddy ³

Affiliations
1 Guru Nanak Institute of Technical Campus (GNITC), Hyderabad, A.P, IN
2 Nalla Narsimha Reddy Engineering College, Hyderabad, A.P, IN
3 J.N.T.U, Anantapur, A.P., IN

Abstract

Exhaust Gas Recirculation (EGR) System means to use the Exhaust Gas coming from Exhaust Manifold to inlet manifold in order to reduce the emission of NOX, which is particularly very harmful. Engine without EGR are more pollutant and uses more atmospheric air for combustion. By implementation of EGR system in engine, the partial exhaust gas is re-circulated again in engine. It is first cooled in EGR Cooler&then it is mixed with atmospheric air&then passed to Combustion Chamber. Fresh atmospheric air required is reduced&automatically pollutant (CO, CO2, HC, NO_X etc.) is reduced. In the present work is to review the potential of exhaust gas recirculation (EGR) to reduce the exhaust emissions, particularly NOX emissions, and to delimit the application range of this technique with different Isobutonal blends with diesel. In the present investigation brake mean effective pressure is highest at 5% of Isobutonal with 17.9225 of EGR and the brake thermal efficiency 22.65%. The Volumetric efficiency is almost same in all the cases and the brake specific fuel consumption is lower at 7% of Isobutonal with 22.65% of EGR. The system is very much Eco Friendly. Using Exhaust Gas Recirculation (EGR) Technique in engines, the emissions are very much controlled. This method is very reliable in terms of fuel consumption.

Keywords

Exhaust Gas Recirculation, NO_X emissions, AVL Gas Analyze, Infrared Thermometer.

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B. Srinivas ¹, S. Gajanana ², K. Hemachandra Reddy ³, B. Ravi Kumar ²

Affiliations
1 JDA Software India Ltd., Madhapur, Hyderabad-500032, AP State, IN
2 Mechanical Engineering Department, M.V.S.R. Engineering College, Nadergul, Hyderabad-501510, AP State, IN
3 JNTUA, Anantapur, AP State, IN

Abstract

The present work is a contribution of mathematical and operations research models that help in arriving at the best replacement strategies to determine an age of motor vehicle at which the replacement is most economical. Parameters like depreciation, money value, forecasted inflation, nominal interest rate and real interest rate are taken into consideration in model development and for various situations, the replacement period to motor vehicle is suggested.

Keywords

Replacement, Inflation, Forecasting, Interest Rates, and Money Value.

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B. Ravikumar ¹, S. Gajanana ¹, K. Hemachandra Reddy ²

Affiliations
1 Department of Mechanical Engineering, MVSR Engineering College, Nadergul, Hyderabad, IN
2 Department of Mechanical Engineering, JNTUA, Anantapuram, IN

Abstract

Sheet metal spinning process is a plastic working technology and is frequently used for manufacturing axisymmetric shapes. Sheet metal spinning has developed significantly and spun products have widely used for various industrial applications. In the current paper a review is carried on finite element simulation of multi-pass spinning with different path profiles and multi-domain techniques of simulation process. It is also proposed scope for new tool geometries for metal spinning process.

Keywords

Metal Spinning, Multi-Pass, Simulation, Multi-Domain.

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B. Ravikumar ¹, S. Gajanana ¹, K. Hemachandra Reddy ², G. Rahul Teja ¹

Affiliations
1 Department of Mechanical Engineering, MVSR Engineering College, Nadergul, Hyderabad, IN
2 Department of Mechanical Engineering, JNTUA, Anantapuram, IN

Abstract

Metal forming involves deforming of metal physically into various derived shapes and sizes under the effect of externally applied forces. Flow forming is an advanced, near net shape, chip less metal forming process, which employs an increment rotary point deformation technique for manufacturing seamless, dimensionally precise tubular and other rotationally symmetrical products. Spinning is an advanced continuous and local metal forming process, which is widely used in many fields due to its advantages of flexibility, high quality and low cost. It is frequently used for manufacturing axisymmetric shapes where press tooling might not be justified on grounds of size and production volumes. It also has the possibility of producing parts that could not be deep drawn. Initial workpiece shape is either a flat blank or a preformed hollow component. It is characteristic of this process that the deformation does not occur in an annular zone around the axis of rotation but that the tools act upon a much localized area in which plastic flow takes place. During spinning tools are moved relative to the rotating workpiece. In this paper, a Regression model showing the relation among input process parameters, Mandrel speed (rpm), Roller type and Thickness of sheet (mm) and output response spinning force is developed using full factorial design of experiments conducted on Aluminum 2024-T3 sheets with parabolic mandrel. Contribution of each factor on output is determined by Analysis of Variance (ANOVA).

Keywords

Metal Spinning, Factorial Design of Experiments, ANOVA, Spinning Force.

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B. Ravi Kumar ¹, S. Gajanana ¹, K. Hemachandra Reddy ², P. V. K. Chaitanya Kumar ¹

Affiliations
1 MVSR Engineering College, Hyderabad, Andhra Pradesh, IN
2 AP State Council for Higher Education, Vijayawada, Andhra Pradesh, IN

Abstract

Spinning is widely used metal forming process to fabricate components or products have rotational symmetry. It is a localized metal forming process which is mainly used due to its advantage of high quality associated with low cost for manufacture. In this process a tool is pressed against the rotating pre form of final product. The surface rough ness is one of the important parameters of spun product which are used in aerospace industry. In the present study an investigation is carried out on Al2024 material to get a conical product by adopting Taguchi OA methodology for experimentation. The experiment is carried out by using two different geometry rollers namely single roller and double radii roller at two different rotational speeds on different thickness of sheets as input parameters. The surface roughness is the target response in this investigation. Regression model for surface roughness is developed using MiniTAB software. Further Analysis of Variance was carried out to find the contribution of each parameter on the response.

Keywords

Conical Mandrel, Surface Roughness, Regression Model, Taguchi Method.

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