DESIGN AND FINITE ELEMENT ANALYSIS OF SPUR GEAR

This paper proposes a method for the design of spur gear tooth profiles using parabolic curve as its path line of action. A mathematical model, including the equation of the line of action and the characteristics of the gear profile designed by the proposed method are analyzed. A comparative study on the different root fillet radii with the involutes gear profile. The function of undercutting condition is derived from the model. The effects of the two design parameters, that present the size (or shape) of the parabolic curve relative to the gear size, are the shape of tooth profiles and the contact ratio are also studied through the design of spur gear drive. The strength, including the contact stresses and life of cycle, of the gear drive designed by using the proposed method and CAD model generated CATIA –V5 and is analyzed by an FEA simulation with ANSYS 14.0. A comparison of the above characteristics of the gear drive designed with the involutes gear drive is also carried out in this work. The results confirm that the proposed design method is more flexible to control the shape of the tooth profile by changing the parameters of the parabola curve.