Helical Gear and Spur Gear

The gears are generally used to transmit power and torque. Gears are one of the most critical components in mechanical power transmission systems. The efficiency of power transmission is very high when compared to other kind of transmission. In the gear design the bending stress and surface strength of the gear tooth are considered to be one of the main contributors for failure of the gears in gear set. Thus, analysis of stresses has become popular as an area of research on gears to minimize or to reduce the failures and for optimal design of gears. In this paper bending stress at the root of the helical gear tooth can be calculated by using analytical method which is calculated by the Lewis stress formula. In this project, helical gear is designed by using solid works 2016 and the numerical solution is done by ANSYS, which is a finite element analysis package. The main objective of this research has to reduce the stresses induced in gear tooth profile by changing five different helix angles (13˚, 18˚, 23˚, 28ånd 33˚). In this paper, 23˚of 23˚of helix angle is selected for helical gear used in synchromesh gearbox according to the ranges of helix angles and AISI 5160 OQT 400 is chosen for helical gear the maximum von-Mises stress and strain values of AISI 5160 OQT 400 are less than other two materials. The results are then compared with both the Lewis equation and ANSYS procedure.

In Automobile industry, Adjustable Unified wheel opener is a special purpose tool made to open/close all the nuts of a wheel in single operation with less effort. Although various methods are used for opening nuts, they require a lot of effort to open a single nut and also time consuming because you should open/close single nut separately. The main objective of work is to develop a single tool with use to open multiple nuts in single operation with simple mechanisms, which is widely use during assembling and dismantling of wheels in automobiles. It can be successfully used as a standard tool irrespective of the model of the vehicle. Also it can be used in assembly line of automobiles, garages, workshops and service stations.

The progress of additive manufacturing technology brings about many new questions and challenges. Additive manufacturing technology allows for designing machine elements with smaller mass, but at the same time with the same stiffness and stress loading capacity. By using additive manufacturing it is possible to produce gears in the form of shell shape with infill inside. This study is carried out as an attempt to answer the question which type of infill, and with how much density, is optimal for a spur gear tooth to ensure the best stiffness and stress loading capacity. An analysis is performed using numerical finite element method. Two new infill structures are proposed: triangular infill with five different densities and topology infill designed according to the already known results for 2D cantilever topology optimization, known as Michell structures. The von Mises stress, displacements and bending stiffness are analyzed for full body gear tooth and for shell body gear tooth with...

The progress of additive manufacturing technology brings about many new questions and challenges. Additive manufacturing technology allows for designing machine elements with smaller mass, but at the same time with the same stiffness and stress loading capacity. By using additive manufacturing it is possible to produce gears in the form of shell shape with infill inside. This study is carried out as an attempt to answer the question which type of infill, and with how much density, is optimal for a spur gear tooth to ensure the best stiffness and stress loading capacity. An analysis is performed using numerical finite element method. Two new infill structures are proposed: triangular infill with five different densities and topology infill designed according to the already known results for 2D cantilever topology optimization, known as Michell structures. The von Mises stress, displacements and bending stiffness are analyzed for full body gear tooth and for shell body gear tooth with above mentioned types of infill structure.