helical gear

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

Figure 1 and Figure 2 show the frequency domain diagram of angular acceleration of driven wheel after modification. It can

Helical gears are meshed at the same time in the process of meshing. When studying the dynamic problem of gear

Transmission error is an important index of gear transmission performance. Transmission error refers to the difference between the actual position

Worm machining helical gear is mainly realized by changing the center distance between cutter and gear along the tooth width

As shown in Fig. 1, the tooth surface of the modified helical gear obtained by changing the center distance is

The phenomenon of tooth surface twist refers to the torsion of tooth surface along the direction of tooth width. As

Worm or hob machining helical gear coordinate system is shown in the figure, S1 is worm or hob coordinate system,

Taking the gear pair in gear parameters as an example, the three-dimensional geometric model of four groups of gear pairs

In the process of helical gear transmission, the tooth surface contact deformation is caused by sudden change load, and the

According to the international standard of iso6336-1-2006, the average meshing stiffness of a gear is regarded as the total stiffness

According to the above-mentioned time-varying meshing stiffness equation of helical gear, the contact line of helical gear pair is used

In order to study the time-varying meshing stiffness of helical gears, a three-dimensional model is established by three-dimensional software, and

When a pair of helical gears are engaged, the contact line of the two gear surfaces is a straight line

The tooth spalling model is shown in Figure 1, where SH is the depth of tooth spalling, SL is the

When the potential energy method is used to solve the time-varying meshing stiffness of spur gear, the meshing stiffness mainly

Calculation of contact line length of helical gear The length of contact line of helical gear has a great influence

1.Actual meshing line length of tooth profile In the transmission process of helical gear, the meshing line of tooth profile

Helical gear is widely used in high-speed and heavy-duty transmission because of its smooth transmission, strong bearing capacity, low noise,

Calculation of contact line length of helical gear The length of contact line of helical gear has a great influence