Solution setting of two-dimensional contact analysis of spur gear
Spur gear contact is a typical nonlinear problem, and its solution process generally needs iterative calculation. There are problems of […]
Spur gear contact is a typical nonlinear problem, and its solution process generally needs iterative calculation. There are problems of […]
In the actual fatigue wear test of spur gear, the pinion is the driving spur gear and the big gear
The 18CrNiMo7-6 spur gear of Zhengzhou Machinery Research Institute is taken as the research object. The spur gear is characterized
Using the advanced curve drawing function in the two-dimensional drawing software CAXA electronic Using the advanced curve drawing function in
As the key component of high-end equipment, the research on the precision forging process of large module spur gear has
Warm cold composite forming technology is a new process abroad in the 1970s, but it was not widely used in
According to the production practice of spur gear, the elastic deformation in the forming process of spur gear blank is
In the case of the same volume and the same upper and lower bottom diameter, it is quite cumbersome to
As an analysis method in the process of metal plastic forming, numerical simulation does not need to build physical models,
In the rotary forging process of spur gear, the contact area between the swing head and spur gear blank is
According to the actual situation in the production and experiment of rotary forging of spur bevel gears, in order to
Ring rolling module is a special module of DEFORM-3D to simulate spur gear ring rolling process, which is a method
The advantages of spur gear ring rolling process include shorter production time, better quality, smaller tolerance and saving a lot
The structural parameters and test parameters of spur gear are as follows: the material of spur gear is 20CrMnTi, the
In order to verify the test results of the previous ring block model samples, the size distribution of the pit
The two-dimensional contact finite element analysis of spur gear meshing can only reflect the change of spur gear contact stress
The two-dimensional contact numerical simulation of smooth and concave bionic spur gears is carried out by using the finite element
There are four main shape parameters of spur gears: cumulative pitch error, tooth thickness error, tooth direction error and tooth
Through the three-dimensional numerical simulation of the ring sample, it is concluded that the ring sample with a certain surface
The comparative experimental study on the wear resistance of concave and smooth spur gears is carried out by using the
Pro/E is a parametric modeling software, which can establish the three-dimensional model of spur gear through parameterization, which greatly improves
Fatigue pitting caused by the friction between the meshing surfaces of spur gears is one of the main failure forms
Generally, the models used in simulation analysis are simplified, and it is impossible to fully consider all factors; From the
Based on linear elastic fracture mechanics, the crack propagation and life of spur gear root are studied by using the
Previously, we used the joint simulation method of ANSYS and FRANC3D to carry out the static analysis of the root
After heat treatment, the large spur gear blank enters the processing stage. Before this link is officially carried out, it
Mechanization not only improves the production efficiency and quality, but also greatly avoids the risks in the production process. The
Considering the symmetry of teeth in spur gears, in order to reduce the amount of calculation, one single tooth is
The factors affecting crack growth studied by ZHY gear senior engineer team, such as stress ratio, corrosion environment, crack body
Within the range of elastic mechanics, Paris gives the fatigue crack growth rate of spur gear expressed by the formula,
For the analysis of fatigue crack propagation of spur gears, the calculation of crack propagation life of spur gears is
Within the scope of on-line elasticity, the theory of fatigue crack growth rate of spur gear is mainly Paris theory.
Spur gears are widely used in electric power, chemical industry, petroleum, aerospace, automobile and other fields. Almost all these spur
The fatigue crack growth rate of spur gear is the basis for predicting the crack growth life. Paris formula is
The cracks in practical components are often composite cracks composed of two or more cracks. Considering the random combination of
In the process of three-dimensional composite crack propagation, the existing fracture criteria can not completely and accurately describe the crack
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
It is necessary to set up the parameters and mechanical model in the crack propagation process of spur gear by
Most spur gears yield to cyclic load and are widely used in aerospace, wind power generation and other industrial fields.
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
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% –
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.
The three forming process schemes will be comprehensively evaluated and analyzed from the three aspects of material utilization, production efficiency
In order to clearly see the deformation process of inner and outer teeth in the forming process of spur gear
In recent ten years, with the rapid development of computer hardware and software technology and the in-depth study of material
The numerical simulation analysis is based on the assumption of rigid plastic finite element model. Properly combine and simplify the
Taking the sun gear in a truck wheel reducer as the research object, its part drawing and three-dimensional solid model
The rolling forming process of spur gear improves the production efficiency and material utilization, shortens the processing process, and the
Cold extrusion process is a production technology with high precision, high efficiency, high quality and low consumption, which is widely
Fully referring to the idea of shunting method, it is decided to adopt the approximate trapezoidal tooth profile scheme with
The basic forming process of spur gear has its own obvious advantages and disadvantages. It can only solve the problems
The basic principle of split flow forging is shown in Figure 1. It is to set up metal overflow channels
The process principle of floating die is shown in the figure. It was first put forward in 1987 when scholars
The principle of forward extrusion forming process of spur gear is shown in the figure. Under the action of extrusion
The upsetting extrusion process principle of spur gear is shown in Fig. 1, which means that the tooth punch moves
Yang Cheng et al. Analyzed the influence of mandrel exchange, floating die and local upsetting on the precision forging of