Research on precision forging technology of spiral bevel gear
The research on spiral bevel gears and hypoid gears in foreign countries is early, develops rapidly, and is also very […]
The research on spiral bevel gears and hypoid gears in foreign countries is early, develops rapidly, and is also very […]
When metal is heated in oxidizing atmosphere (air or furnace gas), it will react with O2, H20 or CO2 to
As shown in the figure, the load stroke curve of the three schemes shows that the load change laws of
The blank of precision forging straight bevel gear on the friction press is hot-rolled bar. The manufacturing process is that
As shown in the figure, the structure diagram of the pre forging die for the half shaft gear is given.
Several common formulas for calculating the precision forging forming force of spur bevel gears are given below. Formula 1: Where
As shown in the figure, the structure diagram of the planetary gear final forging die is given. Since the final
Strain is a physical quantity that represents the magnitude of deformation, the cumulative process of plastic deformation and the development
The purpose of designing the bevel gear pre forging is to ensure that the metal can fill the final forging
The tooth profile of hot forging bevel gear is the basis for designing and inspecting the tooth profile of die
In the “one fire two forging” process for forming bevel gears, the tooth profile of hot forgings is obtained by
The precision forged bevel gear tooth surface can be directly applied without machining. It requires that the precision forged gear
1.Establish involute tooth profile curve equation The theoretical tooth profile curve of spur bevel gear is spherical involute. Because the
For precision die forging, it is very important to remove the oxide skin on the bevel gear blank and forging
According to the characteristics of spur bevel gear parts and the requirements of closed cold precision forging process, the following
The UG software is used to design the part drawing and forging drawing of the spur bevel gear and the
Japanese scholars K Kondo and K ohga proposed the gear split flow forging method and applied it to spur gears.
In the 1950s, the former Bayer light metal company of West Germany took the lead in using the precision die
With the rapid development of the forging industry, the industry has made great contributions to China’s scientific and technological development,
The hot forging process of spiral bevel gear blank is completed at high temperature, and the metallographic structure of metal
Taking the forging process of driving and driven spiral bevel gears as the research object, the forging process of gear
The stroke load curve of the die in the general forging process of the spiral bevel gear blank is shown
In the DEFORM-3D post-processing function, the time-dependent curves of the equivalent stress-strain and temperature at a certain point of the
Although a lot of research has been done on precision forging of spiral bevel gears at home and abroad, there
Through the stress-strain analysis and temperature analysis of the spiral bevel gear blank after hot forging, we know that the
The equivalent stress distribution of spiral bevel gear blank during final forging is shown in the figure. The maximum stress
Since the 1990s, with the development of computer software and hardware, numerical simulation methods have made great progress. There are
Before the 1990s, the research and production of gear forging were mainly based on physical simulation. That is because the
China’s gear manufacturing industry started late. It began to produce gears in the 1950s and formed its own gear manufacturing
The research on spur gear forging at home and abroad mainly focuses on the precision forging of spur gears. The
Forging is a plastic forming processing method, which uses various pressure machines to exert pressure on the metal blank under
The equivalent stress in the forging process of equal height spiral bevel gear is an important analysis index, which affects
Taking 18CrNiMo7-6 spur gear as the research object, the finite element models of three schemes are established, and the warm
Cold finishing process is the last process in compound forming. It is the key point in the whole process to
Professor Liu Quankun of Hefei University of technology proposed to simulate the continuous extrusion forming of spur gear through the
At present, there is little research on die modeling and precision forging process of equal high tooth spiral bevel gear.
In 1987, British universities first proposed the idea of precision forging hollow parts with floating die. According to the principle
Ohga K and Konda K first proposed to apply the shunting process to the precision forging technology of spur gears
The stroke load curve of the die in the general forging process of spiral bevel gear is shown in the
Gear is an important part of mechanical transmission. Its main function is to transmit power and change the speed and
Although a lot of research has been done on the precision forging of spiral bevel gear at home and abroad,
The forging process of gears has also been studied by numerical simulation in China. Liu Quankun, Hu Chengliang and Wang
The forging experiment is carried out by hot forging. Firstly, the forging die is processed, and then the forging experiment
Before the 1990s, the research and production practice of gear forging was mainly based on physical simulation. That is because
The two-dimensional diagram of upper and lower dies of spiral bevel gear is shown in Figure 1. 1.Establishment of mold
The temperature distribution of bevel gear blank during final forging is shown in the figure. The maximum temperature during final
In view of the problems of large material waste and high cost caused by the traditional die design and process
The hot forging simulation forming process of spiral bevel gear wheel is similar to the cold forging process. The model
Forging is a plastic forming processing method, which uses various pressure machines to exert pressure on the metal blank under
There are roughly two methods for precision forging of gears: (1) Traditional closed die forging Closed die forging, also known
Take three points as shown in Figure 1 to study the changes of stress, strain and temperature with time in
The forging object of spiral bevel gear blank (without punching and trimming) is shown in the figure. Comparing the numerical
Spiral bevel gear is the key transmission part of many important machines and is widely used. Forging spiral bevel gear
The die drawing process of spiral bevel gear precision forging is simulated in DEFORM-3D. The specific simulation process is as
Thermal wear and thermal fatigue analysis of forging die are two main forms of thermal failure, which can significantly improve
China’s gear manufacturing industry started relatively late. It began to produce gears in the s of the last century and
According to the production practice of spur gear, the elastic deformation in the forming process of spur gear blank is
From the observation of the factors affecting the forging difficulty of spiral bevel gear small wheel, the volume of spiral
The hot forging cold finishing method is used for the experiment. Because the forging simulation of small wheel shows that
The pitch cone angle is a very important parameter in the geometry of spiral bevel gear, which is directly related