helical gear

Before the solid modeling of helical gear in Pro/E software environment, firstly, the coordinates of discrete data points calculated in […]

Due to the complexity of face gear tooth surface, it is very difficult to create a complete helical gear model

When the helical gear meshes with the tool, the speed of the former at the contact point is zero. At

When deriving the helical gear equation, the main parameters of the tool need to be determined are: normal surface modulus:

The helical gear is divided into m slice helical gears along the tooth width direction AA ‘, the M slice

Since the theoretical model does not carry out finite element modeling on the box, and the effective value of vibration

Take the modification amount of helical gear profile CA = 30 μ m. The helical gear profile modification length La

Zhang Liang et al. Proposed a calculation method for the position and length of helical gear meshing line. Because this

The helical gear tooth direction modification length Lc = 10mm, and the helical gear tooth direction modification amount CC is

On the basis of considering the nonlinear coupling excitation of stiffness and error, without considering the tooth direction modification of

The dynamic equation of helical gear system shown in the following formula is established by finite element method: Where m

Figure 1 shows that the tooth profile modification length Lc = 10mm and the tooth profile modification amount CC are

In order to study the influence of different tooth profile modification amount and different modification length on the stiffness and

According to the interference diagram of hobbing helical gear and the change of width parameters of helical gear and length

（1） Undercutting theory of helical gears When the face gear engages with the tool, the speed of the former at

According to Newton’s second law of motion and D’Alembert’s principle, an 8-DOF torsional vibration and translational vibration coupling dynamic model

The above single pair of tooth stiffness algorithm is used to calculate the comprehensive meshing stiffness of helical gears with

For helical gear system, generally, the total coincidence degree is greater than 2, that is, at least two tooth pairs

When hobbing helical gear, first check the correctness of fixture installation, the accuracy of tool setting and the adjustment of

(1) Outer diameter of helical gear hob The outer diameter of helical gear hob not only affects the stability of

Helical gear hob is one of the most widely used high-efficiency tools. Gears with any number of teeth with the

Before deriving the equation of helical gear, the meshing equation is obtained first. The process of machining helical gear is

When the generating method is used to process helical gear, the main parameters are determined first: the rotation direction of

In order to verify the accuracy and rapidity of the method in this paper, the same gear parameters are used

When the helical gear is an ideal tooth profile, assuming that there is no backlash between the gear pairs and

The helical gear can be regarded as a sheet helical gear. The helical gear is divided into m sheet helical

The modification amount of helical gear profile CA = 30 μ m. The helical gear profile modification length La =

Diagramming the imaginary circle diameter DPT of helical gear measuring ball The figure is a diagram of the imaginary circle

The figure shows the geometric relationship of the measuring ball in the alveolar. The N-N section is the normal section

It is known that the parameter of an external cylindrical helical gear is Mn = 5, α n= 20 °，

The following equation can be obtained from the geometric knowledge of involute gear: Where, α T is the end face

Three dimensional crack models at different positions are established on the helical gear, and the stress intensity factor and J-integral

In order to study the effect of crack length on stress intensity factor and J-integral, the above semi elliptical initial

In order to analyze the three-dimensional crack model of helical gear root, a pair of three-dimensional helical gear models need

According to the measured value of stress intensity factor, kmax and Kmin can be obtained, and the range of stress

Under the elastic-plastic condition, the J-integral of helical gear crack describes the stress and stress field at the crack front