Abstract—In this project we have done computer aided design, modeling and analysis of bull gear of a drag line which specifically deals with drag system of dragline. Dragline is a heavy duty mechanical hardware used for removal of overburden in opencast mine. It is similar to a crane in which hoisting, dragging and swinging operation of buckets are possible over and above these, a walking mechanism is provided with the help of which entire platform of dragline can be shifted from one location to another. Design of heavy earth moving machinery requires accurate method and design should result in reliable construction and withstanding the required load while being economical. This project work contains stress analysis of BULL GEAR, part of the Dragline, in which the stress developed in gear is tried to reduce with the help of software approach. In this project detailed study of drag system is done than modeling of bull gear is done in PRO-E software and analysis is done in ANSYS software. BULL GEAR is once manufactured lifetime equipment so it is considered that once the part is manufactured, it should work lifelong but sometimes crack appears in Bull gear part. In this project, with the help of software, development of crack in bull gear is tried to reduce by using proper material properties and applying software results to the part.

Index Terms—Bull gear, Drag line, Drafting, Discretization, FEA.

Cite: Shrikant Awatade and Umesh Bokade, "Computer Aided Design, Modelling and Analysis of Bull Gear of A Drag Line," International Journal of Mechanical Engineering and Robotics Research, Vol. 2, No. 2, pp. 125-134, April 2013.