Realization of helical gear
The solid contour is generated by cutting the solid contour as the spiral surface, and then the contour is generated […]
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.
The combined die is the key component for continuously extruding the external teeth of spur gear. The combined die adopts
When the module, number of teeth, helix angle and process parameters of helical gear are consistent, three groups of different
① Hot forging blank The material of spur gear in truck wheel reducer is 20CrMnTi. Solid bar is selected as
The difference between helical gear and spur gear is that the teeth of helical gear are distributed along the helix.
The continuous extrusion forming process of the external teeth of the spur gear is the same as that described above.
Due to the formula of indexing circle diameter d = mz, it can be seen that the diameter of the
1.Influence of blank temperature The blank temperature of spiral gear is 20 ° C, 450 ° C and 850 °
Closed die forging process is a traditional one-step process. Its forming process is simple and convenient for analysis and research.
In order to clearly see the deformation process of inner and outer teeth in the forming process of spur gear
All teeth on helical cylindrical gears are the same and have unified characteristics. The normal tooth profile will be generated
The numerical simulation analysis is based on the assumption of rigid plastic finite element model. Properly combine and simplify the
Based on the existing forming methods of driving and driven bevel gear blank of automobile rear axle, a new composite
The figure shows the metal velocity distribution of different strokes in the cold finishing process of spiral bevel gear, in
As the starting point of casting forging compound forming process, whether the process design of casting process and the control
1. Tooth surface contact analysis of spiral bevel gear Based on the above theoretical methods, the whole process design software
1.Load stroke curve Figure 1 shows the load stroke curve of hot die forging process of different taper schemes of
Shu Qifu once put forward the concept of “equivalent blank” to study the influence of taper on the forming process
1.Load stroke curve Fig. 1 is the load stroke curve of spiral bevel gear blank obtained according to the approximate
The figure shows the distribution of equal effect variation in the final step. From the figure, it can be seen
Referring to the tooth size of cold precision forging preform, the closed hot die forging die chamber is designed and
Fully referring to the idea of shunting method, it is decided to adopt the approximate trapezoidal tooth profile scheme with
The traditional tooth surface contact mainly includes transmission error and tooth surface contact area. At present, a new analysis method,
CATIA software is used to complete the three-dimensional modeling of upper die, lower die and cold precision forging preforms with
The forming quality of forgings directly determines the quality and service life of products. The surface finish of the straight
The figure shows the equivalent stress distribution diagram of spiral bevel gear at different strokes in the cold finishing process,
1. Part drawing analysis Figure 1 is the part drawing of the driven spiral bevel gear of the rear axle
Using traditional manufacturing technology to produce high-performance complex parts has become the bottleneck restricting the improvement of product quality and
The data obtained from the on-site measurement of the profile error of spiral bevel gear teeth are the readings XRK
The figure shows the stroke load curve of the helical gear cold finishing process. It can be seen from the
Physical simulation is a method based on similarity theory and combined with experiment to study the essence and law of
Use CATIA three-dimensional mathematical modeling software to establish the three-dimensional mathematical models of the upper die and lower die in
In the process of metal plastic forming, most of the deformation work of metal plastic deformation will be transformed into
The analysis of metal flow law can make us more clearly understand the flow law of metal in the forming
Based on the generating principle, the profile error of gear teeth is measured on the machine, and the workpiece needs
Equivalent strain refers to the strain equivalent to unidirectional strain formed by the appropriate combination of various strain components in
The equivalent stress distribution diagram can clearly show the equivalent stress distribution in the bevel gear blank, so that the
During the precision forging process of the driven spiral bevel gear of the automobile rear axle, the load will change
By analyzing the equivalent stress distribution obtained from each group of simulation experiments, it is found that the equivalent stress
Stress is the internal force per unit area, which reflects the stress of spiral bevel gear blank. Figures (a), (b),
It can be seen from the research that the change of finishing forming force is not only affected by the
Using CATIA V5R21 three-dimensional mathematical modeling software, the three-dimensional mathematical models of upper and lower dies and blanks in the
The role of bevel gear die in the process of metal plastic forming is huge. In the process of metal
After the assembly of hob and helical gear, the following settings must be completed before the hobbing motion simulation of
Different bevel gear die structures will directly affect the metal flow, thus affecting the load required in the forming process.
In the process of forming helical gear by precision forging, friction will inevitably occur between the blank and the die
The node velocity reflects the speed of metal flow at the node at a certain movement time. Figures (a), (b),
Strain is a physical quantity indicating the size of deformation, the accumulation process of plastic deformation and the development process
At different forming speeds, the distribution law of equivalent stress in the forming process of each simulation experiment is basically
The unreasonable selection of the finishing quantity will directly affect the filling condition of the tooth profile and the roughness
The speed of forming speed has a very important impact on the processing efficiency and quality of forgings. With the
For the process of precision forging the driven spiral bevel gear of automobile rear axle at different temperatures, the distribution
Analyze the stroke load curve of the forming process of the driven spiral bevel gear of the automobile rear axle
On ABAQUS software, the meshing process of spiral bevel gear is divided into 200 incremental steps. In the dynamic analysis,
The plasticity of metal is related to temperature. The higher the temperature, the better the plasticity of metal. For forging,
As shown in the figure, the equivariant distribution diagram of five spiral bevel gear blank size schemes is shown, in
As shown in the figure, the equivalent stress distribution diagram of five spiral bevel gear blank size schemes is shown,
Die forging refers to the process that the helical gear blank is formed in the die bore under the action
The vibration noise of helical gear system with modified friction coefficient of 0.1 is calculated. In order to study the