Tooth root crack is considered as one of the crucial causes of failure in the gearing system and it occurs at the tooth root due to an excessive bending stress developed in the root region. The modern power transmission gear drives demand high bending load capacity, increased contact load capacity, low weight, reduced noise and longer life. These subsequent conditions are satisfied by the aid o...

The helical gear pair of a box-type vibration exciter mine-used linear vibrating screen is subjected to complex excitation and prone broken tooth failures. At present, investigation regarding the difference particularity between transmission in screens (i.e., machinery) that rotating machinery still challenge, which key revealing performance failure mechanism premise application screens. In ord...

In this research, we integrate a three-dimensional micro-/nano-lattice structure metamaterial with conventional helical gears using composite method to reduce the vibration. A comprehensive six-degree-of-freedom nonlinear dynamics model is constructed analyze vibration characteristics of resulting mechanical gear pair. The incorporates crucial factors such as meshing damping, error excitation, ...

precision forging process is widely used for the production of spur gears due to its advantages such asimproved strength and surface finish, little waste of materials and reduction in the machining time ofthe gear. an important aspect of precision forging process is the load required to perform the processsuccessfully and design the forging tools. in this research, a new kinematically admissibl...

In this paper, a double-side milling method on spiral bevel gear is proposed. First, according to the tooth taper processed by method, influence of dedendum angle was researched. Taking cut parameters into comprehensive consideration, geometric were designed through inclination root line and modified mean point in which machine setting calculated selected. Only met meshing equation, error press...

Recently, bicycles are used as exercising machines and traffic vehicles. Planetary gear trains can be used as the transmission systems for bicycles. The purpose of this work is to propose a design methodology for the kinematic design of automatic gear transmissions with planetary gear trains for bicycles. First, applying the check list method (combining and extending methods), the design concep...

A contact stress capacity expression is derived for cylindrical worm sets by considering the as a helical rack mating with gear. The concept of equivalent spur gear defined instantaneous radius curvature in virtual plane utilized model formulation. All basic design parameters and are incorporated which explicitly shows influence base nominal helix angles on stress. By geometry engagement, activ...

Introduction Gears are highly engineered machine elements that must be designed not only to meet the torque, speed, life and noise requirements under nominal conditions, but also to compensate for adverse effects due to manufacturing errors, variations and elastic deformations of the support structures. In addition to the elastic deformation of the support and structures, manufacturing errors i...