Failure analysis of grinding crack of shearer gear
1. Material composition inspection The gear of shearer needs surface carburization and quenching. The material is 25CrMo steel specified in […]
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Selection of basic worm of gear hob
Gear hob is the most widely used high-efficiency tool. Gears with any number of teeth with the same modulus can
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Mechanism analysis of grinding cracks on automobile steering shaft teeth
The microstructure before carburizing and quenching is ferrite + pearlite. Pearlite is distributed on the ferrite matrix in lamellar form.
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Detection and analysis of grinding cracks in automobile steering shaft teeth
1. Chemical composition analysis Firstly, the chemical composition of the original forging is analyzed, and it is found that the
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Theoretical analysis of undercutting and tooth tip sharpening of helical gear
（1） Undercutting theory of helical gears When the face gear engages with the tool, the speed of the former at
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Surface crack test of s40c steel gear
1. Chemical composition analysis The chemical composition analysis results of steel gears are shown in Table 1, which meet the
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Surface crack of s40c steel gear
With the advent of China’s high-speed, heavy load, alpine and other models, especially the successful launch of China’s standard EMU,
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Grinding burn and grinding crack of hard tooth surface of cylindrical gear
In the general NC grinding process, when the grinding wheel bears different loads, the cutting force changes accordingly. The change
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Technological process of grinding burns and cracks on hard tooth surface of cylindrical gear
There is a heat treatment tooth surface hardening process before grinding the hardened cylindrical gear, which will inevitably lead to
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Influence of elastic support system on dynamic transmission error of spiral bevel gear
The dynamic transmission error of spiral bevel gear system is related not only to the mechanical and geometric properties of
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Example comparison of digital real tooth surface modeling of hypoid gear
Taking a hypoid gear as an example, the geometric parameters of the hypoid gear and the setting parameters of the
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Parameter determination and tooth surface error analysis of spiral bevel gear
The real tooth surface of large and small wheels is obtained by scanning measurement of spiral bevel gear tooth surface
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Improvement of machining technology of large size and high precision spiral bevel gear
The design of side gear and quasi double-sided curved surface gear is the same as that of arc gear and
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Pretreatment of finite element model of spiral bevel gear
The pre-processing of spiral bevel gear finite element analysis includes element selection, application of load boundary conditions and setting of
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Smoothing algorithm for discrete data points of digital tooth surface of hypoid gear
The traditional discrete data fairing algorithm is based on the curvature calculation of interpolation curve, and the “noise points” are
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Machining technology of large size and high precision spiral bevel gear
Processing principle of spiral bevel gear: the Simulation wheel is a processed spiral bevel gear, and the unified chuck is
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Establishment of finite element model of spiral bevel gear
Three finite element models of gear pairs are established on ABAQUS platform: theoretical tooth surface, only large wheel meshing surface
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Improved local interpolation algorithm for digital tooth surface of hypoid gear
The traditional NURBS surface interpolation algorithm interpolates the curve first and then fairs the curve. The defect of this method
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Dynamic transmission error of spiral bevel gear with real tooth surface
1. Mathematical model of transmission error Figure 1 shows the dynamic model of spiral bevel gear transmission system under elastic
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Machining of large size and high precision spiral bevel gear
Spiral bevel gear is a key part in the field of mechanical transmission, which transmits motion or power between intersecting
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Real tooth surface model of hypoid gear based on non feature discrete data block technology
In the process of constructing the real tooth surface of digital hypoid gear, in order to quickly and accurately describe
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Coupling dynamic modeling of helical gear modification and friction excitation
According to Newton’s second law of motion and D’Alembert’s principle, an 8-DOF torsional vibration and translational vibration coupling dynamic model
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Cutting simulation of equal height spiral bevel gear
Equal height spiral bevel gear is widely used in automobile, aviation, aerospace and other fields because of its high transmission
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Real tooth surface model of hypoid gear based on three coordinate measurement
In the actual use of hypoid gears, the wear phenomenon can be regarded as tooth profile error. In order to
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Composition of gear cutting system
1.Hardware structure of gear cutting system Hardware structure of gear cutting system: main control computer and main control system are
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Theoretical tooth surface model of hypoid gear
In order to facilitate the establishment of the real tooth surface model, the theoretical tooth surface model is established first.
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CNC system for gear cutting
NC machining of gears is an effective way to improve gear accuracy and machining efficiency. It is one of the
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Calculation of meshing stiffness of helical gear before and after modification
The above single pair of tooth stiffness algorithm is used to calculate the comprehensive meshing stiffness of helical gears with
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Study on calculation method of helical gear friction excitation
For helical gear system, generally, the total coincidence degree is greater than 2, that is, at least two tooth pairs
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Melting and heat treatment of cast steel large gear of mining mill
The method of electric arc furnace primary smelting + LF refining is adopted for liquid steel smelting. In order to
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Cutting test of equal height spiral bevel gear
According to the cutting parameters of equal height spiral bevel gear determined by simulation and the inclined angle of cutter
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Research status of helical gear vibration and noise in China and abroad
The noise generated by structural vibration is an important noise source in helical gear system. In the design stage of
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Cutting simulation of equal height spiral bevel gear
① Import the cutter bar and gear blank models established in UG into advancededge software according to the actual machining
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Manufacturing technology of cast steel large gear for mining mill
Large gear is the core transmission part of mining mill, and its reliability is related to the safety and stability
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Coupling dynamics of helical gear modification and friction excitation
Gear transmission is the most important and widely used mechanical transmission device, which is widely used in machinery, transportation, chemical
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Cutter path in cutting simulation of equal height spiral bevel gear
The cutting path of contour spiral bevel gear with extended epicycloid cannot be fully simulated in advantageedge software. The actual
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Establishment of induction heating finite element model of large spur gear
The module of large spur gear is 40, the number of teeth is 35, the tooth width is 80mm, and
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Local induction heating process of large spur gear
Gear is one of the most widely used parts in mechanical transmission. Its quality and service life directly affect the
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Prospect of compound forming technology of continuous cold extrusion and cold shaping of spur cylindrical gears for trucks
The compound forming process of continuous “cold extrusion + cold shaping” of spur gear is studied, mainly for the purpose
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Manufacture and assembly of mould for spur gear
The process experiment mold design refers to the mold structure of the finite element model and the main size parameters
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Establishment of geometric model for cutting simulation of equal height spiral bevel gear
The cutting process of equal height spiral bevel gear with different cutting parameters is simulated, then the cutting force and
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Formation principle of cycloid of hypoid gear
The tooth milling of cycloid hypoid gear is designed according to the principle of “imaginary plane gear” (crown wheel, also
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Influence of different shaping parameters on the accuracy of spur gears
The sizing belt of shaping die is one of the important process parameters affecting the forming accuracy of spur gear.
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Cold shaping process analysis and preliminary determination of shaping amount of spur gear for truck
1. Analysis of cold shaping process scheme The cold extrusion die after multi-objective optimization is used for production, and the
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Influence of addendum fillet r on spur gear forming
In order to study the influence law of tooth top fillet r on the forming of spur cylindrical gear, the
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Cutting path equation of equal height spiral bevel gear
The tooth surface hobbing method is adopted for the processing of equal height spiral bevel gear, that is, while the
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Die angle α Influence on the forming of spur gear
The die angle is one of the important process parameters in the design of tooth concave die. It is not
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Numerical simulation results of spur gears
The correctness of the finite element model needs to be compared with the actual situation. If the simulation results are
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Tooth contact of cycloid Hypoid Gear Considering installation error
Hypoid gear is more and more used in the rear axle of automobile because of its high bearing capacity, stable
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Countermeasures for technical difficulties in gear cutting
1.Synchronous phase locking Synchronous phase locking is a method of frequency capture in the field of communication, in order to
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Meshing performance of Hypoid Gear Considering installation error
In engineering application, due to machining error, installation error and support deformation, the meshing position of hypoid gear pair can
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Establishment of finite element model of spur gear
Cold extrusion process is a complex elastic-plastic deformation process with many influencing factors. Die shape, material properties, lubricant selection and
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Establishment of three-dimensional geometric model of hypoid gear
In the current automotive hypoid gear processing methods, generally, when the large wheel cone angle is large, the forming method
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Original forming technology of spur gear
Large module gear in power transmission of heavy industry (m ≥ 3) is essential. With the rapid development of heavy
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Compound forming technology of continuous cold extrusion and cold shaping of spur gear for truck
From the multi-objective optimization of cold extrusion process parameters of spur gear, the influence of shaping quantity on the accuracy
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Calculation example of tooth contact of cycloid hypoid gear based on installation error
The mathematical model of hypoid gear with split cutter face rolling cutting method is established. The three-dimensional model of small
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Time varying meshing stiffness of hypoid gear of automobile drive axle
The motion transmission error of hypoid gear is the main excitation of gear vibration energy. In most hypoid gear equipment,
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Tooth surface contact analysis of hypoid gear
Figure 1 shows the gear pair meshing coordinate system, S1 and S2 are the dynamic coordinate system of small wheel
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Quality control of the contact area of hypoid gear after heating
In recent years, China’s automobile industry has developed rapidly. NVH (vibration and noise) performance has attracted extensive attention of automobile
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Pretreatment of LTCA finite element analysis model of spiral bevel gear
The pre-processing of spiral bevel gear finite element analysis includes the selection of elements, the setting of analysis types, the