Stress, strain and temperature analysis of spiral bevel gear blank
(1) Stress analysis of vertical forging process It can be seen from Figure 1 that the stress at the conical […]
(1) Stress analysis of vertical forging process It can be seen from Figure 1 that the stress at the conical […]
The damage value in deform does not indicate whether there is damage, but the possibility of defects in this part
(1) For the cross wedge rolling process to form the driving spiral bevel gear blank, can we consider selecting the
Due to the material head, the material utilization rate is not high and the coaxiality of the product is not
During the rolling process, the rolled piece begins to fold in the wedge section II, and the shaft is rolled
Use the measuring tool in dfeorm post processor to measure the dimensions of each part of the spiral bevel gear
The fatigue crack growth rate of spur gear is the basis for predicting the crack growth life. Paris formula is
After the end of the wedge section, the forming of the workpiece is coming to an end, and the parts
The cracks in practical components are often composite cracks composed of two or more cracks. Considering the random combination of
The process adopts two processes: first, the rod is rolled by cross wedge rolling, and then the cone head is
As one of the core parts of the automobile drive axle, the driving spiral bevel gear is easy to be
For the swing rolling forming of spiral bevel gear, the key parameters such as taper of cone die, common angle
The tooth profile of a spiral gear has a helical angle with a certain angle. Therefore, when demoulding the spiral
The most traditional method of producing driving spiral bevel gear blank in China is pre forging cross forging method, which
The cold rotary forging precision forming process of bevel gear is an advanced manufacturing technology. Its process design in actual
Figure 1 shows the engineering drawing of spiral cylindrical gear bearing structure female die. It can be seen from the
In the process of three-dimensional composite crack propagation, the existing fracture criteria can not completely and accurately describe the crack
Although the emergence of fracture mechanics has only been half a century, with the unremitting efforts of scholars all over
Cross wedge rolling drives the workpiece to rotate in the opposite direction of the roll through the same rotation of
This process is planned to adopt one-time rolling forming. Considering the requirements of cross wedge rolling process on the symmetry
As one of the core parts of the automobile drive axle, the driving spiral bevel gear is easy to be
Spiral bevel gear is the most critical part of the transmission system. The service life and vehicle performance of automobile
Spiral gear is a key part used in mechanical transmission and power. It has high technical content, wide uses and
The precision forming of bevel gear by cold rotary forging is an advanced bevel gear processing technology adopted in recent
Figure 1 shows the engineering drawing of spiral bevel gear bearing structure female die. The outer diameter of the die
After the precision plastic work is completed, the workpiece may be close to the punch or stuck in the die,
Swing rolling of spiral bevel gear is a processing method in which the blank is continuously and locally loaded by
In the swing rolling of spiral bevel gear, there are many factors affecting the forming quality and size of bevel
In the process of spur gear crack propagation, the stress intensity factor changes with the crack propagation. Compared with the
At present, simplified models are used in the research of fatigue crack of spur gear tooth root. In these simplified
When using rigid viscoplastic finite element method to analyze metal plastic forming, the material meets the following assumptions: (1) ignoring
In recent years, some scholars have done a lot of research on the rotary forging process. The rotary forging of
Figure 1 shows the equivalent stress distribution diagram of closed die forging of spiral bevel gear. Under four reduction quantities,
Due to the characteristics of the rotary forging process of bevel gear, it has the following main advantages: (1) Save
1.Establishment of finite element model The finite element model is shown in Figure 1. The forging with gears is formed
Spiral bevel gear is one of the core parts of automobile engine to transmit power. It can transmit large load
The blank with lower boss needs to be obtained by large bar cutting, which not only wastes man hours, but
The normal profile is scanned according to the spiral guide line to generate the helical gear profile surface, and then
It is necessary to set up the parameters and mechanical model in the crack propagation process of spur gear by
The blank material is DEFORM-3D material library AISI-4120, the temperature is 850 ℃, the temperature effect in heat conduction and
Figure 1 shows the helical cylindrical gear in the automobile gearbox. The normal surface modulus M = 2.5mm, the number
Most spur gears yield to cyclic load and are widely used in aerospace, wind power generation and other industrial fields.
Helical cylindrical gear is an important transmission part widely used in automobile and machinery industry. Its shape is complex, and
The solid contour is generated by cutting the solid contour as the spiral surface, and then the contour is generated
For a long time, for designers, the design or development of a process scheme is basically based on production experience.
Bevel gear swing rolling, namely swing rolling, also known as axial rolling, is a new plastic processing technology gradually and
The combined die is the key component for continuously extruding the external teeth of spur gear. The combined die adopts
With the development of mechanics and computer simulation technology, the research on fatigue crack of spur gear has made great
Bevel gear is widely used in mechanical transmission, especially in automobile transmission mechanism. The traditional bevel gear processing adopts the
When the module, number of teeth, helix angle and process parameters of helical gear are consistent, three groups of different
As a typical transmission part, bevel gear is widely used in many industries, such as aviation, aerospace, automobile, instrument and
① Hot forging blank The material of spur gear in truck wheel reducer is 20CrMnTi. Solid bar is selected as
According to the statistics of scholars, most of the mechanical component failures belong to fatigue failure, accounting for 50% –
In the process of helicall gear design, CAD / CAM / CAE integrated software UG is adopted. Combining the three-dimensional
The difference between helical gear and spur gear is that the teeth of helical gear are distributed along the helix.
The cold extrusion precision plastic forming technology of spur gear has the advantages of saving materials, improving production efficiency, ensuring
The continuous extrusion forming process of the external teeth of the spur gear is the same as that described above.
(1) The parametric modeling of helical gear is carried out by using three-dimensional modeling software UG. After parametric modeling, helical
Through the numerical simulation analysis of the closed die forging of helical gear, the parameters such as temperature, friction factor,
Due to the formula of indexing circle diameter d = mz, it can be seen that the diameter of the