October 2017, Volume 4, Issue 10 JETIR (ISSN-2349-5162) JETIR1710007 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org 47 DESIGN IMPROVEMENT BY STATIC STRUCTURAL AND VIBRATION EXAMINATION OF A BEVEL GEAR FOR EPICYCLIC GEAR TRAIN IN PUGMILL Manish Sharma 1 , Mandeep Singh 2 , Dr.Manish Bhargava 3 1 Maharishi Arvind Institute of Engineering and Technology, Jaipur 2 Maharishi Arvind Institute of Engineering and Technology, Jaipur 3 Maharishi Arvind Institute of Engineering and Technology, Jaipur Abstract-The initial requirement for a project work is to identify and understand the nature of the problem. The problem is related to the automobile engineering and the Production area. The Bevel gear has crucial terminology. The tooth contact analysis (TCA) is an important resource for the design of gear drives. The contact pattern, contact path and the function of transmission errors that are directly related to the performance. The contact pattern are directly related to Spiral angle. This paper is related to spiral angle of the spiral bevel gear. Spiral angle is made by pitch cone radius and path of gear. We also improve the material of the spiral bevel gear. The material used for Bevel gear is usually Medium Iron Steel having Carbon 2.1- 4.5 wt.%, Si (normally 1-3 wt. %) Generate a three-dimensional solid CAD model, Solid Workbench 15.0 software is used as a design modeler. After the design modeling, the finite element model is generated using FEA software ANSYS. Then the engineering data tool is used to select various Gear materials that are 45C8, C55 and 40Cr4Mo3, then geometry is imported using ―IGS file conversion on ANSYS. After this the model is converted into meshed model. Then the boundary conditions are applied. The structural analysis model is used for the analysis of Gears. The output parameter is Total Deformation. The life of the Gear is calculated in the terms of Directional deformation. Total 15 numbers of cases are generated for analysis. For vibration analysis, analysis is done on 6 different frequency modes. Keyword- Spiral Bevel Gear, Mean Spiral Angle, Mean Radius of Pitch Cone, 45C8, C55 and 40Cr4Mo3, ANSYS I. INTRODUCTION A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh withanother toothed part to transmit torque. Geared devices can change the speed, torque, anddirection of a power source. Gears almost always produce a change in torque, creating amechanical advantage, through their gear ratio, and thus may be considered a simple machine. The teeth on the two meshing gears all have the same shape. Two or more meshing gears, working in a sequence, are called a gear train or a transmission. The paper is based on spiral angle. Mean Spiral angle almost similar to helix angle on the helical gear. Fig.1 Spiral Bevel Gear Fig.2 Line Diagram of mean spiral angle Mean Spiral Angle=arctan (   ) Where l is lead of the screw or gear. r m is mean radius of the screw thread or gear. Spiral Angle directly dependents on two Basic parameters. 1 st Mean cone distance 2 nd Arc of gear/pinion teeth On this paper we are change mean spiral angle. We have taken 5 different mean spiral angle on basis of reference papers. II.GEOMETRIC MODELING AND SPECIFICATIONS OF SPIRAL BEVEL GEAR Scientists draw on a variety of both qualitative and quantitative research methods, including experiments, survey research, participant observation, and secondary data. Quantitative methods aim to classify features, count them, and create statistical models to test hypotheses and explain observations. Qualitative methods aim for a complete, detailed description of observations, including the context of events and circumstances. An experiment is a research method for investigating cause and effect under highly controlled conditions. When conducting an experiment, researchers will test a hypothesis. A hypothesis is a statement of how two or more variables are related. A survey is a research method in which subjects respond to a series of statements or questions in a questionnaire or an interview. Surveys target some population, which are the people who are the focus of research. Because populations are usually quite large, the researcher will