Research Article
International Research Journal of Mechanical Engineering Vol. 2 (6) pp. 161-173, June, 2014. © International Scholars Journals
Full Length Research Paper
Designs for Gudgeon pin in returning air compressors by semi analytic approach
*Jagjivan Mitra, Vishnu Y. Shankar and Amitabh Bachchan
Department of Mechanical Engineering, Faculty of Engineering, Himachal Pradesh University, Shimla, India.
E-mail: [email protected]
Accepted 27 May, 2014
Abstract
The deformation and stress experienced by the Gudgeon pin of a reciprocating compressor used in air brake system is scientifically predicted when the pin is fully floating with lubricating oil surrounding it and when starved of oil. Both semi analytical approach in finite element method and simple bending theory of beams are used. Inadequacy of the beam approach is highlighted. The results obtained by both the approaches are compared. Role of clearance in piston bore and small end of connecting rod and effectiveness of lubrication are examined. Factor of safety associated with the design of Gudgeon pin is also looked into.
Key words: Gudgeon pin, semi and fully floating pin, semi analytic method, role of lubricant, factor of safety.
Vishnu Y. Shankar and Amitabh Bachchan, *Jagjivan Mitra
Page: 161 - 173
Research Article
International Research Journal of Mechanical Engineering Vol. 2 (6) pp. 154-160, June, 2014. © International Scholars Journals
Full Length Research Paper
Enhancement in productivity of sports goods industrial cluster in Meerut India
*Jagjivan Mitra, Vishnu Y. Shankar and Amitabh Bachchan
Department of Mechanical Engineering, Faculty of Engineering, Himachal Pradesh University, Shimla, India.
E-mail: [email protected]
Accepted 8 May, 2014
Abstract
Small scale industries are the main employment provider in any developing country. Most of the micro, small and medium (MSME) scale industries development is due to the efforts of individual entrepreneurs. These entrepreneurs lack the knowledge of various technical and legal aspects of MSMEs. Many times, due to the lack of information, these individual entrepreneurs do not know the latest development in the technology and the market dynamics. They lack the knowledge of the availability of funds required to establish the industry. These issues hamper the MSMEs significantly and undermine the potential of the entrepreneur community as a whole. Difficulties to establish an industry also causes a deterrent to many potential entrepreneurs. A single point information centre called common facilitation centre (CFC) can resolve these issues. CFC can cover all aspects of the industry including availability of technology, machinery, sources of funds, material requirement, new developments and human resource development. CFC can help in changing, not only the development of the industry, but the whole society. In this work, we have presented an overview of a sports goods MSMEs cluster in Meerut city, India. It covers the various aspects of problems and how CFC can help in resolving these issues.
Key words: Micro, small and medium scale industries (MSMEs), technology, entrepreneur, innovations.
*Jagjivan Mitra, Vishnu Y. Shankar and Amitabh Bachchan
Page: 154 - 160
Research Article
Full Length Research Paper
An experimental study of cutting temperature distribution in machining heat treated medium carbon steel on a lathe
Awolabi E. K.1, Odibo Micheal1* and Saseun E.Victor2
1Department of Mechanical Engineering, Faculty of Engineering, Rivers State University, Port-Harcourt, Nigeria.
2Department of Mechanical Engineering, Federal University of Technology, Akure, Nigeria.
E-mail: [email protected]
Accepted 25 April, 2014
Abstract
This study was carried out on medium carbon steel subjected to various form of heat treatment operations by assessing the temperature distribution during the machining process. The model of oblique band heat source, moving in the direction of cutting in an infinite medium with an appropriate image heat source was used in this investigation. The model analysis was carried out separately on the chip, the tool and the work material to numerically determine the temperature distribution during machining process using finite element method with nodal grids. Johnson-Cook model was used to determine the work materials flow stress upon which the material properties were determined. Stress/strain tests were conducted on the specimens to determine the materials’ constant parameters which were used as the input parameters to the modeling equation written in Visual Basic 6.0. The optimum shear angle of 20° was used for the machining process and the frictional characteristics were also determined. The temperature along the shear plane AB was determined with reference to coordinate axis within the tool, workpiece and the chip using the model. The results which compare favorably with other results from literatures, provide basis for the design of machining variables for optimum and quality machined products which can also be applied in the computer programming of NC machine for precision machining
Key words: machining, cutting tool, heat treatment, “as received”, normalized, annealed, tempered, hardened, simulated, profile.
Odibo Micheal* and Saseun E.Victor, Awolabi E. K.
Page: 144 - 153
Research Article
International Research Journal of Mechanical Engineering Vol. 2 (5) pp. 138-143, May, 2014. © International Scholars Journals
Full Length Research Paper
Effect of the rotor during centrifugal high volume division of oil and water
Woodrow Franklin Einstein
Department of Mechanics of Manufacturing and Production, Faculty of Mechanical Engineering, University of California, Santa Barbara, California.
Email: [email protected]
Accepted 19 April, 2014
Abstract
Centrifugal separation of oil and water from streams that is concentrated with oil such as the ones from the oil spill disasters is investigated in this study. The existing theories are largely for Stokes settling of oil drops. In this study, two layers, one rich in oil and another rich in water are allowed to spin in a centrifuge. The tangential velocity profile is derived from the equations of continuity and motion. The power drawn at the inner rotor is calculated for a set of parameters for the system and an angular speed w RPM (revolutions per minute). Each simulation required the solution of four simultaneous equations and simultaneous unknowns. The power draw was found to be linear with angular rotor speed on a log-log plot. The viscosity of the oil was increased five times to study the effect on the power draw. An expression of the interlayer thickness ratio (a) was obtained by use of a component mass balance on oil streams that flow in and out of the continuous centrifuge.
Key words: Centrifugal separation, polar coordinates, equation of motion, layered flow, matrix inversion, computer simulations, power draw, revolutions per minute (RPM).
Woodrow Franklin Einstein
Page: 138 - 143
Case Study
International Research Journal of Mechanical Engineering Vol. 2 (5) pp. 128-137, May, 2014. © International Scholars Journals
Case study
Flying bike concept
1Amit Singh Dhakad and 2Pramod Singh
1Department of Mechanical Engineering, Christian College of Engneering and Technology, Chhattisgarh Swami Vivekanand University, Bhilia (Durg), C.G, India.
2Department of Mechanical Engineering, Siddhaganga Polytecnic, Tumkur Board of Technical Education Banglore-Karnataka, India.
E-mail: [email protected]
Accepted 7 January, 2014
Abstract
The flying bike concept is to produce the vehicle to fly in air, generally which we own for moving on road for flying purpose independently. It is simply based on our own motor vehicle/bike with front and rear wings in order to provide lift and a push propeller at the back of the vehicle/bike in order to produce the thrust for the forward movement with the help of driven rear wheel due to arrangement. Using this concept a low cost machine or bike can be modelled in order to fly in air without any other source rather the same source petrol for moving an engine. With these concepts we can fly individually or with one or two passenger extra as per the design of airfoil chosen and developed for the bike. Any how it is cheaper as it only cost for the airfoil arrangement and propeller arrangement on the personal bikes. Also, it gives the passion and feeling for piloting to one who loves flying independently and individually. Hence, it includes the personal air bike or flying bike for the multi utilisation of flying, surveying and traffic free touring. Thus this concept will create a new invention for independent purposes and applications instead of waiting and booking for the flights.
Key words: Flying bike, wings flying, petrol engine, airfoil, Independent.
Amit Singh Dhakad, Pramod Singh
Page: 128 - 137
Research Article
International Research Journal of Mechanical Engineering Vol. 2 (4) pp. 124-127, April, 2014. © International Scholars Journals
Full Length Research Paper
Productivity development of computer numerical control (CNC) set up in manufacturing company
Shyamal Prabhakar Mittal
Department of Mechanics of Manufacturing and Production, Faculty of Mechanical Engineering, University of Rajasthan, Jaipur, India.
Email: [email protected]
Accepted 27 March, 2014
Abstract
Most manufacturing operations require periodic setups for product changes, process-control verifications or engineering evaluations. Setups performed in-line-on the tool in lieu of running product take away from production time and may be classified as waste. This paper focuses that, setup procedures should be analyzed to see if they can be done in parallel, off line, to allow production to continue. Alternatively, process checks might be accomplished with product parts instead of monitors, eliminating what is effectively downtime (waste) for a tool or sector. In this paper data was also calculated and collected after implementing of Set up Reduction Single Minute Exchange of Dies (SMED) technique. By implementing Set up Reduction (SMED), waste time is reduced from 113.75 h in June 2008 to 59.75 h in May 2009 with 585.00 h available time for machining. Productivity of machine also increases from 19 platens in June 2008 to 44 platens in May 2009.
Key words: Set up reduction, single minute exchange of dies (SMED), productivity, world class manufacturing, down time.
Shyamal Prabhakar Mittal
Page: 124 - 127