Defects and technical improvement of gear heat treatment
The deformation of gear heat treatment is very complex, which is a comprehensive reflection of the factors affecting the deformation […]
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Development of gear processing machine tools abroad
Since the 20th century, the demand for gears has increased rapidly, which has promoted the development and production of gear
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Angle relation between gear hob and gear
In the process of gear hobbing, according to the ideal processing conditions, that is, without considering any external error, the
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Bench loading test of drive axle hypoid gear
In order to verify the correctness of the drive axle model and LTCA simulation results, the bench loading test is
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The vibration characteristics of gear hobbing machine are analyzed
The process of vibration signal transmission caused by self-excited vibration between hob and workpiece in the machining process of machine
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Influence of tool radial circular runout error on Gear Hobbing
The tool radial runout error ∆ mainly affects the tooth profile error of the gear. The modeling is shown in
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Research progress of gear chemical heat treatment process
1. Chongqing Changjiang diesel engine factory has carried out rapid gas nitrocarburizing process test and mass production assessment on 45
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Overview of the development of China’s gear industry
As the core mechanical basic component, gear is widely used in automobile, ship, aerospace, high-speed railway, energy equipment, intelligent manufacturing
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Load bearing contact area and load transmission error of hypoid gear tooth surface of drive axle
Before LTCA analysis, firstly, the three-dimensional model of hypoid gear needs to be aligned for finite element mesh generation to
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Influence of tool rake angle error on Gear Hobbing
The schematic diagram of tool forefoot error is shown in the figure. When the cutter is grinding, there is an
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Machining error analysis of gear hobbing machine
There are 24 errors affecting the mutual position of gear hob and workpiece, including 12 motion errors and 12 installation
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Error analysis of gear hobbing machining system
In the process of gear hobbing machine machining, whether it is machine tool, fixture or meshing motion, there are errors,
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Research progress of gear annealing and quenching and tempering
For a long time, the forging blanks of car gears are mostly normalized. In recent years, with the diversification of
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Design contact area and transmission error of hypoid gear tooth surface of drive axle
Under the actual working condition, due to the meshing dislocation of the drive axle hypoid gear under the load, the
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Cold extrusion process of spur gear
The cold extrusion process of spur gear is a net forming or near net forming process. Its production efficiency and
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Gear material and heat treatment forming
1. Practice has proved that the general machine tool gears are made of medium carbon steel and treated by induction
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Compound forging process of spur gear
Spur gear is the key component of high-end equipment. The design and manufacture of high life, high performance, high efficiency
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Meshing misalignment of hypoid gear of drive axle
The installation position of hypoid gear in the drive axle transmission system is shown in Figure 1. The hypoid gear
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Analysis of selecting 6 points at different positions of spiral bevel gear
In order to analyze the material flow and stress conditions at different positions of forged spiral bevel gear, six points
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Characteristics of spur gear parts
The 18CrNiMo7-6 spur gear provided by Zhengzhou Machinery Research Institute is taken as the research object, and the product part
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Analysis of stroke load curve of cold precision forging of spiral bevel gear
During the cold precision forging of spiral bevel gear big wheel, the blank deforms under the loading force of the
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Characteristics and application of precision forging process for spur gears
Compared with ordinary die forgings, the shape of precision forgings is more complex, the machining allowance is less or even
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Analysis and preventive measures of heat treatment defects of automobile rear axle gears
Automobile rear axle gear is one of the important parts in automobile driving system. It transmits power in the process
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Six point analysis of tooth surface selection for simulated forming of spiral bevel gear
Six points are selected on the tooth surface. Points P1 ~ P3 correspond to three positions on the convex surface
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Experimental results of dynamic characteristics of helical gear transmission system
Since the theoretical model does not carry out finite element modeling on the box, and the effective value of vibration
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Development status of gear die and forging industry
Gear mold is an important basic equipment of industrial production and an integral part of high-tech industry. Gear mold technology
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Gear hobbing method of high order elliptic gear
The research on non-circular gears with typical pitch curve is a representative direction of non-circular gear design and manufacturing. The
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Edge trimming of precision forged spiral bevel gear
According to the characteristics of the forging process, the tooth profile of the spiral bevel gear is trimmed, which is
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Analysis of precision forging of spiral bevel gear
The forging of spiral bevel gear belongs to complex curved surface forging. As shown in the figure, the forging difficulty
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Influence of geometric parameters on precision forging of spiral bevel gears
There are still some difficulties in the precision forging process, so the forging of spiral bevel gear has not been
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Simulation of precision forging process of spiral bevel gear by DEFORM-3D
Import the cold precision forging die and blank model of spiral bevel gear into DEFORM-3D software. The specific steps are
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System dynamic response of synthesizing helical gear profile modification and tooth direction modification
Take the modification amount of helical gear profile CA = 30 μ m. The helical gear profile modification length La
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Application of precision forging in tractor gear
Precision forging (net forming or near net forming) refers to the forming technology that only needs a small amount of
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Improved algorithm for position and length of helical gear meshing line
Zhang Liang et al. Proposed a calculation method for the position and length of helical gear meshing line. Because this
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Analytical calculation model of meshing stiffness of helical gear pair with tooth profile modification
In helical gear transmission system, internal excitation such as stiffness excitation and error excitation of helical gear is an important
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Establishment of three-dimensional model of cold precision forging spiral bevel gear blank
In actual processing, forging blanks are mostly formed by pre forging. First, the blank is pre forged into a blank
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Analysis of die for Cold Precision Forging Spiral Bevel Gear
The precision forging adopts the closed die forging die. During the forging process, the gap between the upper die and
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Ease off surface synthesis of spiral bevel gears
Spiral bevel gear pair conjugate pinion tooth surface Σ 1 modification, in the field of calculation point m, it is
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The dynamic response of the system considering only the tooth profile modification of helical gear
The helical gear tooth direction modification length Lc = 10mm, and the helical gear tooth direction modification amount CC is
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Design and machining of traditional spiral bevel gear
The design of spiral bevel gear includes the determination of basic parameters of gear pair, the selection of tooth cutting
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Calculation example of tooth profile parameters of spiral bevel gear
1. Calculation of tooth profile geometric parameters of precision forged small module spiral bevel gears Under the cold forging process,
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Finite element model of drive axle hypoid gear
The research object is a light bus produced by the company. According to the drive axle drawing of the vehicle,
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The system dynamic response of helical gear profile modification only is considered
On the basis of considering the nonlinear coupling excitation of stiffness and error, without considering the tooth direction modification of
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Tooth profile machining of spiral bevel gear
As the basic transmission parts of the machinery industry, more and more high-strength and multi-purpose gears and gear like products
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Friction coefficient and meshing efficiency of spiral bevel gears
The mixed lubrication model is composed of basic equations, Reynolds equation is composed of oil film equation, density equation, viscosity
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Influence of alignment error and error coupling compensation on meshing characteristics of herringbone gear
Herringbone gear transmission has the advantages of high bearing capacity, stable transmission and small axial load. It plays an important
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Dynamic model of helical gear transmission system
The dynamic equation of helical gear system shown in the following formula is established by finite element method: Where m
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Only the influence of tooth profile modification parameters on the stiffness and transmission error of helical gear is considered
Figure 1 shows that the tooth profile modification length Lc = 10mm and the tooth profile modification amount CC are
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Empirical formula of friction coefficient of spiral bevel gear
Benedict and Kelley studied the instantaneous contact friction coefficient of spur gears through the gear test bench, and studied the
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Influence of temperature on forging forming of helical gear
The strain of helical gear forging is different under different blank temperature. Figure 1 shows the strain distribution of blank
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Friction coefficient and meshing efficiency of spiral bevel gears
Spiral bevel gears are widely used in heavy load conditions such as helicopters, ships and automobiles. Their friction characteristics are
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Only the influence of tooth profile modification parameters on helical gear stiffness and transmission error is considered
In order to study the influence of different tooth profile modification amount and different modification length on the stiffness and
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Analysis of forging speed field of helical gear
Fig. 1 shows the blank flow velocity field under different pressing amounts. The velocity field of helical gear die forging
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Solution to forging folding defect of transmission second shaft gear
The reason of gear forging folding is that the metal flow is not smooth during final forging, so reducing the
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Establishment of finite element model of helical gear
The die forging process of helical gear studied adopts closed die forging process, which is divided into two processes: blanking
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Trajectory analysis of the transplanting mechanism of the differential eccentric gear train
The transplanting mechanism can be regarded as a two-bar manipulator. The positive and negative planetary gears in the eccentric gear
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Gear precision forging technology – die manufacturing and gear measurement
The precision of cold forming die is the key of gear precision forging technology. At present, the analysis method has
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Research trend of root crack of spur gear
The research of fatigue crack is a part of reliability research. In engineering application, it is mainly to predict the
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Angular relationship of differential eccentric gear train
Place the eccentric fixed shaft gear train in the gear box (planet carrier), and the center wheel 1 rotates in
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Experimental design of dynamic characteristics of helical gear transmission system
According to the operating conditions of high-speed railway traction gear transmission system, different experimental conditions are designed and steady-state experiments