Failure analysis of bevel gear
1. Sample selection Since the crack source cannot be touched, and the hardness test of bevel gear is about 60HRC, […]
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Bevel gear failure background
Processing flow of bevel gear: blanking → finishing → grinding → carburizing and quenching → cleaning → tempering. Later, it
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Determination of cutting force of cylindrical gear with variable hyperbolic arc tooth profile
Because there are many and complex influencing factors in the milling process, there is no theoretical formula to directly calculate
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Large spur gear NC machining machine
After heat treatment, the large spur gear blank enters the processing stage. Before this link is officially carried out, it
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Forging billet and heat treatment of large helical gear
Forging blank is the first link in the processing and manufacturing of large helical gears. The main work is to
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NC forming technology of large gear machining
Large gears generally refer to gears with gear modulus > 16 mm, which are widely used in heavy machinery such
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Processing technology of tractor gear based on ant colony algorithm
In tractor gear processing, the commonly used tools include tractor gear type tools and rack type tools. In the process
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Forming of blank cone of driving spiral bevel gear
By analyzing the vertical forging process, it can be found that there are three stages from the beginning to the
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Stress intensity factors in crack propagation of spur gears
Considering the symmetry of teeth in spur gears, in order to reduce the amount of calculation, one single tooth is
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Trial manufacture of MIM process for equidistant spiral bevel gear
1. 3D model of equidistant spiral bevel gear According to the actual use and the characteristics of the gear, with
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Establishment of finite element model of equidistant spiral bevel gear
Considering the practical engineering application and the material library of Moldex3D simulation software, this paper uses alloy powder as metal
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High precision machining of gear shaft journal with large length diameter ratio
In order to reduce the dimensional error caused by the cutting tool, carry out multiple trial cuts before finishing, master
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Machining method of gear shaft tooth profile with modulus of 65mm
The machining method of gear shaft tooth profile with modulus of 65mm is not exactly the same as that of
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Verification of gravity state of cylindrical gear machine tool with variable hyperbolic arc tooth profile
The gear processing indexing mechanism device is designed on the special machine tool for variable hyperbolic arc tooth line cylindrical
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Machining of long and deep hole of gear shaft with large length diameter ratio
For the deep hole machining of slender shaft, the key point is the concentricity between the hole and the outer
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Prediction of fatigue life of spur gears
Within the range of elastic mechanics, Paris gives the fatigue crack growth rate of spur gear expressed by the formula,
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Design of gear shaft profile milling cutter with modulus of 65mm
According to the connection mode between the tool and the shank used by our company, the tool structure is designed
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Machining of tooth profile of large module gear shaft
The gear shaft with modulus of 65mm (see Figure) is one of the key parts in the transmission mechanism of
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Finite element analysis of cylindrical gear with variable hyperbolic arc tooth profile
In the finite element analysis of the whole machine, the contact between parts has a great impact on the analysis
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Comparative analysis of stress field between cold extrusion and hot extrusion of spiral bevel gear blank
It can be seen from Fig. 1 that the stress distribution near the bevel of the extrusion die is also
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Structure of cylindrical gear machine tool with variable hyperbolic arc tooth profile
In finite element analysis, the solution efficiency is low and the time cost is greatly increased because the machine tool
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Manufacturing and forming principle of cylindrical gear with variable hyperbolic arc tooth profile
The special machine tool for variable hyperbolic arc tooth line cylindrical gear is designed based on the principle of spatial
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Comparison of heat treatment defects of cast steel large gears
Heat treatment is not only a heating and cooling process of workpiece, but also a process of stress generation and
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Fatigue crack growth rate of spur gear
Within the scope of on-line elasticity, the theory of fatigue crack growth rate of spur gear is mainly Paris theory.
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Metal flow analysis of spiral bevel gear blank
(1) Metal flow field during hot extrusion Figure a ~ C in Figure 1 shows the metal flow state at
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Stress, strain and temperature analysis of spiral bevel gear blank
(1) Stress analysis of vertical forging process It can be seen from Figure 1 that the stress at the conical
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Analysis of damage value of spiral bevel gear blank
The damage value in deform does not indicate whether there is damage, but the possibility of defects in this part
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Folding defect of spiral bevel gear blank
During the rolling process, the rolled piece begins to fold in the wedge section II, and the shaft is rolled
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Dimensional error analysis of spiral bevel gear blank
Use the measuring tool in dfeorm post processor to measure the dimensions of each part of the spiral bevel gear
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Derivation of calculation formula for compound mode crack propagation rate of spur gear
The fatigue crack growth rate of spur gear is the basis for predicting the crack growth life. Paris formula is
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Geometric analysis of spiral bevel gear blank
After the end of the wedge section, the forming of the workpiece is coming to an end, and the parts
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Cross wedge rolling closed die forging process for spiral bevel gear blank
The process adopts two processes: first, the rod is rolled by cross wedge rolling, and then the cone head is
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Demoulding method of spiral gear forging
The tooth profile of a spiral gear has a helical angle with a certain angle. Therefore, when demoulding the spiral
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Design of concave die for spiral cylindrical gear centripetal bearing structure
Figure 1 shows the engineering drawing of spiral cylindrical gear bearing structure female die. It can be seen from the
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Compound crack inclination of spur gear
In the process of three-dimensional composite crack propagation, the existing fracture criteria can not completely and accurately describe the crack
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Overview of cross wedge rolling technology
Cross wedge rolling drives the workpiece to rotate in the opposite direction of the roll through the same rotation of
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Cross wedge rolling process of spiral bevel gear blank
This process is planned to adopt one-time rolling forming. Considering the requirements of cross wedge rolling process on the symmetry
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Design of concave die for spiral bevel gear centripetal bearing structure
Figure 1 shows the engineering drawing of spiral bevel gear bearing structure female die. The outer diameter of the die
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Simulation results and analysis of swing rolling forming of spiral bevel gear
Swing rolling of spiral bevel gear is a processing method in which the blank is continuously and locally loaded by
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Initial conditions of spiral bevel gear simulation
In the swing rolling of spiral bevel gear, there are many factors affecting the forming quality and size of bevel
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Stress intensity factors in the process of compound crack propagation of spur gears
In the process of spur gear crack propagation, the stress intensity factor changes with the crack propagation. Compared with the
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Establishment of finite element model of spiral bevel gear
When using rigid viscoplastic finite element method to analyze metal plastic forming, the material meets the following assumptions: (1) ignoring
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Swing rolling of spiral bevel gear
In recent years, some scholars have done a lot of research on the rotary forging process. The rotary forging of
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Simulation results and analysis of closed die forging of spiral bevel gear
Figure 1 shows the equivalent stress distribution diagram of closed die forging of spiral bevel gear. Under four reduction quantities,
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Closed die forging of spiral bevel gear
1.Establishment of finite element model The finite element model is shown in Figure 1. The forging with gears is formed
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Numerical simulation of die forging of round bar blank of helical cylindrical gear
The blank with lower boss needs to be obtained by large bar cutting, which not only wastes man hours, but
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Realization of helical gear
The normal profile is scanned according to the spiral guide line to generate the helical gear profile surface, and then
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Simulation of compound crack propagation of spur gear
It is necessary to set up the parameters and mechanical model in the crack propagation process of spur gear by
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Numerical simulation of die forging of helical cylindrical gear blank
The blank material is DEFORM-3D material library AISI-4120, the temperature is 850 ℃, the temperature effect in heat conduction and
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Analysis of technological parameters of helical cylindrical gear
Figure 1 shows the helical cylindrical gear in the automobile gearbox. The normal surface modulus M = 2.5mm, the number
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Realization of helical gear
The solid contour is generated by cutting the solid contour as the spiral surface, and then the contour is generated
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Analysis of process parameters and gear parameters in numerical simulation of helical gear
For a long time, for designers, the design or development of a process scheme is basically based on production experience.
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Trial production results of spur gear (sun gear)
The combined die is the key component for continuously extruding the external teeth of spur gear. The combined die adopts
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Influence of bevel angle of helical gear
When the module, number of teeth, helix angle and process parameters of helical gear are consistent, three groups of different
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Preparation of blank for spur gear production
① Hot forging blank The material of spur gear in truck wheel reducer is 20CrMnTi. Solid bar is selected as
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Helical angle of helical gear
The difference between helical gear and spur gear is that the teeth of helical gear are distributed along the helix.
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Continuous extrusion forming of external teeth of spur gear
The continuous extrusion forming process of the external teeth of the spur gear is the same as that described above.
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Helical gear module and tooth number parameters
Due to the formula of indexing circle diameter d = mz, it can be seen that the diameter of the
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Analysis of technological parameters of spiral gear
1.Influence of blank temperature The blank temperature of spiral gear is 20 ° C, 450 ° C and 850 °
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Establishment of finite element model of spiral gear
Closed die forging process is a traditional one-step process. Its forming process is simple and convenient for analysis and research.