Although bevel-gear robotic wrists are widely used in industrial manipulators due to their simple kinematics and low manufacturing cost, their gear trains function under rolling and sliding, the latter bringing about noise and vibration. Sliding is inherent to the straight teeth of the bevel gears of these trains. Moreover, unavoidable backlash introduces unmodeled dynamics, which mars robot pe...

A nonlinear dynamic model of the geared rotor system, with consideration of the bearing clearances and gear backlashes, is established. A numerical algorithm based on Runge–Kutta-Butcher method is used to study the nonlinear behaviors of the system accounting for the effects of different excitation frequency. A detailed parametric research is conducted to analyze the influences of the excitatio...

A system of two meshing gears exhibits a stiffness that varies with the number of teeth in instantaneous contact and the location of the corresponding contact points. A classical Newtonian statement of the equations of motion leads to a solution that contradicts the fundamental principle of mechanics that the change in total energy in the system is equal to the work done by the external forces,...

Gear failure is considered the main alarming and undesirable event in gearboxes. Usually, cracks happen by fatigue caused due to cyclic loading. Fatigue stress focused on teeth root because of small tooth fillet radius. This causes progressive damage gear which failure, hence, a damaged gear. work shows numerical framework identify quantify cracks' existence at spur gears. The problem numerical...

The dimensional accuracy of cold extruded sun gear is poor since the material flow considerably complex in forming process. A novel precision finishing method was proposed this study to improve dimension gear, and a new finite element (FE) prediction strategy developed obtain an in-depth understanding deviation distribution laws finished gear. Then, internal-external gears such as flow, tooth d...

The purpose of the research is to improve method for calculating lifetime bevel gears with a circular tooth driving axle BELAZ dump truck hydromechanical transmission. An analysis domestic and foreign calculation methods showed that when determining contact stresses in gearing, influence modification side surfaces teeth on magnitude internal dynamic loads not taken into account, which leads sig...

Involute spur gears are key machine elements for power transmission in various industrial sectors. During transmission, the teeth subjected to high stresses. Many design modifications used reduce these stresses, such as increasing drive side pressure angle and profile shifting factor. These change contact ratio center distance of gear pair. Changing tooth thickness is another solution stress. B...

Abstract Recently, a new methodology for 5-axis flank computer numerically controlled (CNC) machining, called double-flank has been introduced (see “5-axis CNC machining of spiral bevel gears via custom-shaped milling tools—Part I: Modeling and simulation”). Certain geometries, such as curved teeth gear, admit this approach where the tool tangential contact with material block on two sides, yie...

The study employed a two-dimensional (2D) space with multibody dynamics as the physics to simulate dynamic behaviour of intermeshing gears. Both gear teeth and body were principal stress strain well Von Mises system. A pair meshing examined from pinion other for accurate contact stress-strain simulation. validity proposed simulation was verified surface stress, strain, elastic total displacemen...