Tooth surface equation of gear hob
Based on the gear hob coordinate system: SW, (ow: XW, YW, ZW), the involute helicoid model of gear hob is […]
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Application of numerical simulation technology in spur gear forging
Before the 1990s, the research and production of gear forging were mainly based on physical simulation. That is because the
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Machining deformation mechanism of extra large split straight bevel gear
Super large straight bevel gear is a key component in China’s large-scale equipment. Due to the limitation of transportation and
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Gear hobbing principle
Gear hobbing processing principle, as shown in the figure. There are many processing methods for cylindrical gears. According to the
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Ease_off Example analysis of vibration reduction optimization for hypoid gear
In order to study the relationship between vibration and stiffness, the meshing stiffness and frequency spectrum of different modified tooth
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Comparison and analysis of numerical simulation results of spiral bevel gear blank with real object
The actual forging of spiral bevel gear (without punching and trimming) is shown in the figure. Comparing the numerical simulation
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Metal flow law in upsetting process of spiral bevel gear blank
The metal velocity vector diagram of each stage in the upsetting process of spiral bevel gear blank is shown in
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Forging process of driven spiral bevel gear blank
In view of the problems of large material waste and high cost caused by the traditional die design and process
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Contact pressure distribution of helical gears
The contact pressure history curve during helical gear meshing is shown in Figure 1. It can be seen that the
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Establishment of gear hob coordinate system
Based on the selection of basic worm, it is determined that the gear hob selected in this subject is involute
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Ease_ Off example of vibration reduction optimization for hypoid gear
For high-precision hypoid gear pairs, in order to increase the actual coincidence degree after loading, the design of large inclination
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Calculation of time-varying meshing stiffness of helical gears
The meshing of helical gears can be regarded as line contact, and the load changes and distributes along the contact
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Contact analysis of modified helical gear
1. Law of equivalent stress and time change during helical gear meshing The variation law between the dynamic contact equivalent
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Basic attribute setting of spiral bevel gear blank and cutting board
The spiral bevel gear blank is set as a plastic body. Determination of initial forging temperature of spiral bevel gear
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Research on gear forging in China
China’s gear manufacturing industry started late. It began to produce gears in the 1950s and formed its own gear manufacturing
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Deformation measurement of straight bevel gear split blank
Through the measurement of the straight bevel gear split blank with the coordinate measuring instrument, it can be found that
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Integral error model of helical gear transmission
The overall error curve of helical gear is a complete error curve of helical gear, which is formed by measuring
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Machining principle and error of gear hobbing
With the progress of science and technology, the introduction of technology and the deepening of technological transformation, the processing technology
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Forging process of driven spiral bevel gear blank
The purpose of this paper is to simulate the forging process of the blank of the driven spiral bevel gear
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Expression of ease off modification tooth surface of hypoid gear pinion
According to the meshing theory and installation relationship of hyperboloid gear, the gear tooth surface is regarded as an imaginary
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Tooth surface vibration reduction of ease off modified hypoid gear
In order to improve the comprehensive transmission performance of automobile drive axle, the ease off modification hypoid gear tooth surface
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Analysis and calculation of helical gear after changing speed conditions
Increase the speed of helical gear from 25rad / s to 35rad / s, and keep the torque unchanged. Using
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Vibration reduction optimization of ease off modified hypoid gear
Hypoid gear is widely used in vehicle main reducer. With the development of spiral bevel gear towards high speed and
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Research on spur gear forging
The research on spur gear forging at home and abroad mainly focuses on the precision forging of spur gears. The
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Error of generating surface of gear hobbing hob
When machining and manufacturing gear hobs, there is an error between the generating surface of gear hobs and the theoretical
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Gear cutting processing of straight bevel gear split wheel blank
Before machining the straight bevel gear to split the wheel blank, first measure the flatness of the upper and lower
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Principle of helical gear profile modification
Because the coincidence degree of helical gear is not an integer, its meshing transmission process is alternating between single and
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Transmission error and meshing impact of Helical Gears Considering tooth surface friction
Transmission error is an important excitation that causes the vibration and noise of helical gears. It is a parameter that
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Digital simulation of cylindrical gear hobbing process
The basic research idea is: carry out digital simulation on the gear hobbing process of cylindrical gear, analyze the position
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Helical gear transmission considering tooth friction
(1) This paper breaks through the condition limitation of calculating the time-varying contact line length of helical gear multi tooth
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Equivalent stress nephogram of helical gear
(1) Equivalent stress nephogram of helical gear at 0.0025s It can be seen from Fig. 1 that the contact stress
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Time varying contact line load distribution of helical gears
The load distribution along the contact line is affected by the position and length of the helical gear contact line.
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Spiral bevel gear forging
Forging is a plastic forming processing method, which uses various pressure machines to exert pressure on the metal blank under
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Calculation of helical gear modification drum shape and determination of drum shape center
(1) Through analysis, it can be seen that there is no mechanism to determine the size of helical gear drum
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Common helical gear modification methods
Many scholars at home and abroad have put forward a variety of theories and methods for helical gear modification. At
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Classification of tangential and axial machining errors of gear hobbing
The machining error of gear is determined by the process error factors of machine tool, cutting tool, wheel blank and
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Machining technology and NC machining of straight bevel gear split gear blank cutting
According to the structural characteristics and the complexity of the tooth profile of the split straight bevel gear, the vertical
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Research status of gear hobbing abroad
According to the research results, the existing problem is to simplify the gear hobbing process in three-dimensional space to two-dimensional
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Determination of helical gear modification
There are many methods to modify the helical gear drum shape. At present, there are mainly the following two methods;
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Influence of helical gear modification on dynamic contact stress
The impact and vibration of helical gear will inevitably occur in the process of transmission meshing, which will increase the
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Determination of axial position of gear hob
The alignment of gear hob refers to the coincidence degree between the symmetry axis of any tooth (or groove) of
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Influence of cutting ratio of wheel blank on deformation of spur gear with different modulus
Ensure that the diameter of the spur gear is 3600mm, change the modulus of the spur gear to make it
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Second order superharmonic resonance response of helical gear drive
Figure 1 shows the influence curve of friction on the second-order superharmonic resonance. With the increase of friction, the vibration
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Research status of gear hobbing in China
Gear hobbing machine is widely used in automobile, machine tool, engineering machinery and other machinery manufacturing industries. In gear hobbing,
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Helical gear transmission considering tooth surface friction
The dynamic characteristics of helical gear transmission considering tooth surface friction are studied and further studied and discussed: (1) Due
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Variation law of equivalent stress and time in helical gear meshing process
As shown in the figure, the dynamic contact equivalent stress of helical gear and the history curve changing with time
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Nephogram of contact pressure distribution and contact state of helical gear
Nephogram of contact pressure during helical gear meshing: It can be seen from Figure 1 that the contact pressure is
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Control system of spiral bevel gear machining machine tool
In view of the above problems existing in the current spiral bevel gear machining and manufacturing, a new theory and
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Time varying contact line load model for spur gears
The load distribution rate of spur gear in the double tooth meshing area near the root of the tooth is
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Adjustment of installation angle of gear hob
During gear hobbing, the gear hob axis and workpiece axis must conform to a certain axis intersection angle. Therefore, the
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Analysis of time-varying contact line characteristics of helical gears
Helix angle is an important structural parameter of helical gear, and it is also the main factor causing time-varying contact
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Dynamic simulation and calculation of helical gear model with different support shaft stiffness
The simulation process of helical gear dynamic contact has been introduced in detail before. The mesh division is also divided
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The influence of the cutting proportion of the wheel blank on the deformation of spur gears with different diameters
By changing the thickness of spur gear split wheel blank and carrying out finite element analysis on spur gear blank
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Determination of the modification amount of involute helical gear
Local stress concentration is very easy to damage the normal operation of helical gear. Adopting the method of helical gear
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Development of gear processing machine tools in China
In the early 1950s, China’s gear machine tool manufacturing industry began to develop through the full introduction of the technology
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Dynamic characteristics of helical gear transmission considering tooth friction
The dynamic characteristics of the main influencing factors of helical gear vibration and noise are studied. Considering the dynamic characteristics
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Influence of helical gear accuracy grade on Meshing Impact
Helical gear accuracy mainly controls the transmission accuracy between helical gears during operation, such as transmission stability, instantaneous speed fluctuation,
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Cloud chart of equivalent stress distribution during helical gear meshing
Pressure nephogram during helical gear meshing: It can be seen from figures 1 to 4 that when two helical gears
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Mapping Law of gear hobbing machining accuracy
The mapping law between machining system error, gear hobbing principle error, tool error, machine tool vibration and gear machining accuracy
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Establishment of time-varying contact line load model for spur gears
The elastic potential energy u formula of spur gear teeth is written as: Where: ux – bending potential energy; un