The gearbox is the core component of the tractor chassis. At present, tractors mainly use fixed shaft gear boxes, which are simple in structure and low in manufacturing cost, but have complex operation processes and high labor intensity for drivers. The gearbox of Dongfanghong LX904 tractor in China has...
Non-circular planetary gear train mechanism has been widely studied and applied in rice transplanting mechanism because it can realize unequal speed transmission and form a special non-circular closed track at the end of the output component. In recent years, scholars began to study the use of non-circular gear planetary...
As shown in the figure, the load stroke curve of the three schemes shows that the load change laws of the three schemes are basically the same, which can be roughly divided into three stages. In the first stage, the metal flow is similar to free upsetting, and the...
Stress is the internal force per unit area, which reflects the stress of planetary gear blank. Figure 1 and 2 show the stress distribution of the three schemes at the end of the first stage and the second stage. During the whole deformation process, the stress in the transition...
As shown in the figure, the structure diagram of the planetary gear final forging die is given. Since the final forging temperature is lower than the pre forging temperature, the tooth die is designed in the lower die, which will not cause the problem of too high temperature rise...
Strain is a physical quantity that represents the magnitude of deformation, the cumulative process of plastic deformation and the development process of plastic deformation. Fig. 1 and Fig. 2 respectively show the strain distribution of the three schemes at the end of the first stage and the second stage....
As shown in the figure, the structure diagram of the planetary gear pre forging die is given. The tooth die of the planetary gear pre forging die is on the upper die, the contact time between the tooth die and the high-temperature blank is short, and the temperature rise...
The velocity field of planetary gear pre forging directly reflects the metal flow law of the whole deformation process. As shown in the figure, the velocity field distribution under different reduction quantities of the scheme is shown. At the initial stage of deformation, only the upper outer surface of...
Fig. 1 shows the forging drawing of planetary gear and half shaft gear. When formulating the forging drawing of bevel gear, the following aspects should be considered: (1) When determining the parting surface of open die forging bevel gear, the parting surface is composed of back cone parting surface...
The finite element simulation software DEFORM-3D is used to simulate the forging process of “one fire two forging” of planetary gears, and the simulation process parameters are listed in the table. The purpose of pre forging simulation is to study the influence of preform size on metal flow law...