Selection of the movement track of the swing head in precision forming of the bevel gear by cold rotary forging
For the five kinds of swing head motion trajectories in the figure, they are analyzed one by one as follows: […]
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Trajectory of swing head in precision forming of bevel gear by cold rotary forging
The motion track of the swing head refers to the projection track of any point on the axis of the
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Simulation results and discussion of induction heating of large spur gears
Figure 1 shows the front view of the temperature field on the single tooth profile surface and the middle section
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Design of preform for bevel gear rotary rolling deformation
Due to the eccentric load on the workpiece during rotary forging, the metal flow is uneven. If the preform is
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Deformation of thick workpiece in rotary forging of bevel gear
The so-called “thick piece” revolving body means that the thickness h is greater than or equal to the radius R
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Active deformation zone and passive deformation zone of bevel gear rotary forging deformation
The essence of swing rolling is a special two roll rolling. In the process of rotary forging, although the swing
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Study on precision forming process of bevel gear by cold rotary forging
The cold rotary forging precision forming process of bevel gear is an advanced manufacturing technology. Its process design in actual
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Study on propagation law of heavy-duty gear under different initial crack angles
The equivalent stress at the crack tip under different crack inclination angles is extracted and plotted, and the equivalent stress
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Bevel gear hypothetical production wheel
Hypothetical generating wheel is usually used to explain the machining process of bevel gear. It is a virtual bevel gear
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Study on crack propagation law of heavy duty gear under different initial crack positions
Study the crack propagation law when the initial crack position H0 is 60mm, 62mm, 64mm, 66mm, 68mm and 70mm respectively,
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Numerical simulation analysis of crack propagation in tooth root of heavy duty gear
In the actual process of gear meshing, the maximum contact stress usually acts on the tooth surface of the pinion.
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Example of time-varying equivalent meshing of hypoid gears
At 3 000 n · The equivalent time-varying meshing parameters of hypoid gear in one cycle are calculated according to
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Crack propagation principle of heavy duty gear based on extended finite element method
In order to simulate the singularity and discontinuity of element displacement stress, it is realized by constructing the extended functions
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Simulation results and analysis of hypoid gear transmission system
According to the established contact fatigue finite element simulation model of hypoid gear transmission system, the finite element simulation software
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Influence of crack shape on stress intensity factor at crack front of heavy duty gear
Under the influence of crack shape, the change of mode I stress intensity factor is studied. In the process of
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Analysis of calculation results of stress intensity factor at leading edge of root crack of heavy-duty gear
Under the set parameters, the gear model is simulated. As shown in the figure, the trend distribution of stress intensity
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Establishment of three-dimensional model of heavy-duty gear by ABAQUS
The modeling module of ABAQUS software can effectively establish three-dimensional models, but most of them are suitable for three-dimensional model
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Stress intensity factor theory of root crack of heavy duty gear teeth
The characteristics of crack propagation under the influence of external force factors are as follows: 1) The crack surface is
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Bending fatigue life analysis of gear based on ABAQUS / FE-SAFE
ABAQUS / FE-SAFE is used for joint simulation. The analysis process is as follows: firstly, the fatigue analysis software FE-SAFE
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Gear cutting processing of circular arc tooth line gear blank conical end mill
According to the formula, the relationship between LA and FA can be used to change any shape. The machining mechanism
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Fatigue life prediction of heavy load transmission gear by bending test
Through verification, 40 test data under 5 load levels meet the requirements of lognormal distribution. Therefore, the distribution function f
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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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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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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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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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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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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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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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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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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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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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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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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
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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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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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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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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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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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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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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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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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Establishment of meshing coordinate system and spatial matrix transformation of spiral bevel gear tooth surface
At present, most of the spiral bevel gears used in China adopt the American Gleason gear system, and its design
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Rolling ratio spiral bevel gear technology of machining machine tool
i02 is the roll ratio of the machine tool and the process pitch cone of the spiral bevel gear. As
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Preparation of preform for cold rotary forging deformation of bevel gear
The preparation of bevel gear cold rotary forging preform needs three steps: forming, softening annealing and lubrication process design. 1)
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Determination of adjustment parameters of spiral bevel gear meshing machine tool
In the process of spiral bevel gear machining, the large wheel often adopts the generating method and forming method, and
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Meshing point contact conjugate surface of spiral bevel gear
When two moving surfaces s (1) and S (2 When two moving surfaces s (1) and S (2) are driven,
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Induced curvature of common roller surface of spiral bevel gear meshing
When two surfaces s (1) and S (2) are completely conjugate, their relative curvature at the contact point is called
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Meshing equation of spiral bevel gear
When two tooth surfaces mesh, the two tooth surfaces must be tangent at a point m in space. It can
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Relative differential method of spiral bevel gear meshing
Let s (T) be a surface moving continuously in space, u and V are its surface parameters. When expressed by