Heavy load transmission gear test device
According to the differences of loading methods, structural types and working modes of gear test devices, they can be divided […]
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Study on bending fatigue of heavy load transmission gears
Robert Basan proposed a mathematical model of slip line contact and a multiaxial fatigue life calculation model based on Fatemi […]
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Test methods for heavy duty transmission gears
The main form of gear failure is bending fatigue failure. According to the failure physical stress intensity model, it is […]
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Research and development of bending fatigue of heavy duty transmission gears
He Xiaohua of Chongqing University analyzed and studied the bending fatigue strength of 20CrMoH gear. Combined with mathematical statistics theory […]
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Analysis of metal flow law in gear blank forging process
The forging process of gear blank can be divided into upsetting stage, full step transition stage and extrusion flash stage. […]
Scientific
Analysis on distribution law of stress intensity factor at crack tip of heavy load transmission gear
As an important index of engineering fracture analysis, stress intensity factor is adopted by most scholars. The proposal of stress […]
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Finite element analysis of forged gear blank
In the traditional technology, gear processing should go through the processes of blank heat treatment, gear blank processing, tooth profile […]
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Automatic forging production of warm precision forging straight bevel gear
At present, most gear forging enterprises are facing the dual pressure of increasing labor cost and difficult recruitment. The traditional […]
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Research status of bending fatigue of heavy load transmission gears
At present, the research of gear bending fatigue reliability test mainly focuses on how to improve the bearing capacity of […]
Scientific
Prediction of crack propagation life of heavy duty transmission gears under different stress ratios
Multiply both sides of Paris formula by Da and integrate to obtain the formula: By substituting the stress ratio r […]
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Study on compound mode crack of heavy load transmission gear
The research on the method of compound mode crack propagation is mainly through numerical simulation and experimental research. For the […]
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Nephogram of maximum principal strain at crack tip of heavy load transmission gear under different crack lengths
Comparing the solid line and dotted line in Figure 1, for the same material, the value of plane stress under […]
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Study on fatigue crack propagation of heavy load transmission gear
Yang carried out a series of fatigue tests on C45 steel samples with local surface cracks. The effects of carburizing […]
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Study on numerical simulation and spread deformation of gear preform
In order to improve the material utilization, the forging of driven spiral bevel gear is generally realized by final forging […]
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Mesh generation of dynamic crack propagation model of heavy load transmission gear
As the carrier of simulation calculation, grid plays a decisive role in the quality of simulation results. The selection of […]
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Precision forging of driven spiral bevel gear
Driven spiral bevel gear plays an important role in automobile rear axle reducer and is an important part of reducer. […]
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Research status of fatigue crack propagation of heavy load transmission gears
Due to the importance of small fatigue cracks, many researchers at home and abroad have carried out extensive research on […]
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Spectrum analysis method of tractor gear vibration
When the tractor gear has defects, in the process of meshing transmission, the defects will have an impact on the […]
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Experimental study on fatigue crack growth rate of heavy transmission gear under different stress ratios
1) Define the ultimate load and maximum fatigue load The sample is fixed on the fixture by two round pins. […]
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Stress and displacement of different types of cracks in heavy load transmission gears
Different types of cracks have their own stress and displacement: type 1 crack is subjected to tensile stress perpendicular to […]
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Generation of fatigue source of heavy load transmission gear
The whole fatigue process includes three stages: crack initiation, crack propagation and fracture failure caused by final instability propagation. The […]
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Spectrum analysis method of tractor gear vibration
The comprehensive use of characteristic parameters can make a simple diagnosis of tractor gearbox, that is, to judge whether there […]
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Three stages of fatigue fracture of heavy load transmission gears
The fatigue fracture process of metal materials can be divided into three stages: crack initiation, propagation and instantaneous fracture. In […]
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Fatigue crack propagation law formula of heavy load transmission gear
According to the formula, the stress intensity factors Ki, Kii and kiII are mainly used to characterize the stress field […]
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Frequency domain characteristic parameter analysis of tractor gear vibration
Through theory and experiment, it is proved that when the tractor gearbox has no fault, the vibration signal energy is […]
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Tooth load meshing of spiral bevel gears
Through the load meshing analysis of spiral bevel gear and its simulation with computer, the following conclusions are obtained: 1) […]
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Fatigue crack propagation law of heavy load transmission gear
At present, the research on the law of fatigue crack growth mainly uses experimental methods and numerical analysis methods. According […]
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Locus of contact center point of spiral bevel gear under load
Taking the number of large teeth of the gear pair as 47 and the number of small teeth as 33 […]
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Force balance condition of spiral bevel gear
At a certain moment of gear transmission, the locally conjugate tooth profile engages and transmits load. When more than two […]
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Pressure distribution of spiral bevel gear
It can be seen from the comparison of tooth surface contact area under no-load and load that there is a […]
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Kinematic coordination conditions of spiral bevel gears
In the process of gear transmission, the rotation angle of each tooth of the driven gear can be expressed as: […]
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Gear resonance demodulation of tractor gear vibration signal
When the vibration energy is large, such as broken tooth, serious tooth profile error and serious shaft bending, it will […]
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Explain in detail the shape of contact area of spiral bevel gear
Taking the spiral bevel gear pair with 39 large teeth and 13 small teeth as an example, the shape of […]
Scientific
Basic equation of spiral bevel gear transmission
When considering the deformation of gear teeth under load, the basic meshing equation shall be rewritten as: Δ r2、 Δ […]
Scientific
Meshing modulation of gear vibration in practical work of tractor gears
Various defects will inevitably occur in the process of gear processing, installation and use, such as crack, tooth surface fatigue, […]
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Shape of contact area of spiral bevel gear
Taking the spiral bevel gear pair with 47 big teeth and 33 small teeth as an example, when the meshing […]
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Load meshing characteristics of spiral bevel gears
Tooth contact analysis (TCA) is an advanced technology to simulate and analyze the tooth meshing process of gear pair by […]
Scientific
Contact finite element model equation of spiral bevel gear
According to the contact conditions of the contact points, the contact equation of the contact boundary contact point pair can […]
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Current situation of fault diagnosis technology for tractor gearbox
Gearbox fault diagnosis technology is also progressing with the development of science and technology and mechanical fault diagnosis technology. In […]
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Importance of contact finite element model of spiral bevel gear to finite element calculation
The finite element analysis model is very important for finite element calculation. The models and boundary conditions are different, and […]
Scientific
Elastic formula of contact finite element model of spiral bevel gear
The two elastic contact bodies Ω 1 and Ω 2 are separated into two independent objects. According to the elastic […]
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Diagnostic parameter analysis method of tractor gear vibration amplitude domain
In the vibration characteristic analysis of condition monitoring and fault diagnosis, the characteristic parameter method plays an important role. The […]
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Basic forms of tractor gearbox failure
Tractor gearbox not only has the same characteristics and failure forms as other types of gearbox, but also has some […]
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Contact finite element model of spiral bevel gear
Due to the limitation of computer conditions, in the early application of finite element method to study gear problems, only […]
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Eight node finite element method is used for gear tooth contact
The original 20 node finite element method is adopted, which takes the eight vertices and the midpoint of twelve edges […]
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Ideal meshing vibration of tractor gears
Among the various methods of gearbox condition monitoring and fault diagnosis, vibration diagnosis method is widely used because of its […]
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Application of wavelet analysis in fault diagnosis of tractor gearbox
Tractor gearbox is a complex device in the basic components of the whole machine, which is composed of gear pair, […]
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Eight node finite element method for gear tooth contact
The elastic contact problem is a small deformation boundary nonlinear problem, which is caused by both the change of contact […]
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Calculation of initial clearance of spiral bevel gear tooth surface
Spiral bevel gear is point contact in theory. After bearing, the contact area becomes surface contact due to elastic deformation. […]
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Optimization of adjustment parameters of spiral bevel gear machine tool
The actual contact part on the tooth surface of a pair of bevel gears under normal meshing operation conditions is […]
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Influence of cutting adjustment parameters of machine tool on tooth contact of spiral bevel gear
The cutting adjustment parameters of machine tool play an important role in the tooth contact of spiral bevel gear. How […]
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Precision forming technology of bevel gear by cold rotary forging and cad-capp
Based on the systematic theoretical and Experimental Research on the precision forming process of bevel gear cold rotary forging, the […]
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Effect of discharge gap on electrode tooth profile in precision cold rotary forging of bevel gear
In EDM, there is a discharge gap between the tooth profile of concave model cavity and electrode tooth profile δ。 […]
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Tooth shape design of electrode of precision forming tool for bevel gear cold rotary forging
The rotary forging die of bevel gear is composed of concave mold cavity and upper mold swing head. The machining […]
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Point contact conjugate transmission of spiral bevel gear
Spiral bevel gear is point contact conjugate transmission. Under light load, the gear pair forms an elliptical contact area near […]
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Establishment of gear geometric analysis and mechanical analysis
In the establishment of mechanical model, the gear tooth is simplified as a cantilever beam, and the contact state under […]
Scientific
Calculation of rotary forging force of bevel gear
The calculation of rotary forging deformation force can provide a theoretical basis for selecting the tonnage of rotary forging machine. […]
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Bevel gear cold rotary forging precision forming swing head inclination γ determine
Swing head inclination γ It refers to the included angle between the cone die axis and the fuselage axis. Swing […]
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Meshing analysis of spiral bevel gear tooth surface
According to the establishment of coordinate system and spatial matrix transformation, such as the distance from any point of wheel […]
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Load contact analysis of gear teeth
Gleason system is the main spiral bevel gear produced and used in China. Gleason gear technology has been the object […]