Causes of deformation and heat treatment defects of rear axle gear and preventive measures
1. Defect content The automobile rear axle gear is a hyperbolic bevel gear with complex shape. The deformation is inevitable […]
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Three dimensional modeling of hypoid gear transmission system
The hypoid gear transmission studied consists of a small hypoid gear and a large hypoid gear. Due to the complex […]
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Causes and preventive measures of hardened layer, hardness and heat treatment defects of rear axle gear
1. Defect content Including unreasonable distribution of hardened layer, heat treatment defects, surface hardness too high or too low heat […]
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Optimization of gear grinding machine parameters to improve gear grinding efficiency of carburized and quenched gears
Grinding parameter optimization According to the grinding characteristics of grinding wheel, reasonably improve the grinding parameters. Comparison of grinding efficiency […]
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Example of hobbing method for high order elliptic gear
Taking MATLAB as a tool, the three-dimensional virtual gear hobbing of high-order elliptical spur gear and helical gear is carried […]
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Methods of improving gear grinding efficiency of carburized and quenched gears
The heavy-duty gearbox gear bears a great load, which requires the characteristics of stable transmission, low noise and long service […]
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Influence of cutting edge shape of gear hobbing tool on tooth surface roughness
The shape of tool edge is also an important factor affecting the tooth surface roughness in gear hobbing. Two hole […]
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Influence of fillet radius of hob top edge on tooth surface roughness in gear hobbing
During gear hobbing, the surface quality at the gear root is determined by the fillet radius and rake angle of […]
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Influence of gear hobbing processing parameters on tooth surface roughness
Y3150 gear hobbing machine is selected as the experimental equipment, 6542 tungsten molybdenum high-speed steel, class a gear hob with […]
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Measuring method of tooth surface roughness in gear hobbing
Because the gear tooth surface roughness is affected by many factors, the results obtained from different tooth surface measurement directions […]
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Calculation results of meshing stiffness of helical gears without considering tooth profile trimming
In order to verify the accuracy and rapidity of the method in this paper, the same gear parameters are used […]
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Machining simulation experiment and analysis of driving gear of shearer cutting part
Based on the parameters of a shearer and combined with the actual operation, the simulation experiment is carried out by […]
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Machining error and influence of driving gear in shearer cutting section
The transmission system of shearer cutting part is mainly composed of cutting motor, cutting drum, fixed shaft gear, gear shaft […]
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Establishment of comprehensive meshing stiffness model of helical gear with tooth profile trimming
When the helical gear is an ideal tooth profile, assuming that there is no backlash between the gear pairs and […]
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Gear cutting test on universal milling machine
In order to realize the new gear cutting method on the general milling machine, a device which can make the […]
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Gear cutting test on shaft machining center
The proposed gear cutting method can be directly realized by using a 5-axis machining center. When the vertical machining center […]
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Gear cutting processing of helical gear blank conical end mill
In the case of machining helical gears, the tool moves along the rotation axis of the gear blank, which is […]
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Meshing stiffness and error model of Helical Gear Considering modification
The helical gear can be regarded as a sheet helical gear. The helical gear is divided into m sheet helical […]
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Adjustment method of module, number of teeth and pressure angle in gear cutting of conical end mill
In this method, the gear parameters, i.e. modulus m, number of teeth Z and pressure angle α ， It can […]
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Basic principle of gear cutting method of conical end milling cutter
The proposed method uses a conical end mill as a tool, moves back and forth in the tooth width direction, […]
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Causes of forging folding defects of transmission second shaft gear
Forging process flow of two shaft gear forgings: blanking with band saw（ φ 85mm round steel) → heating in medium […]
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Comprehensively consider the influence of tooth profile and tooth direction modification parameters on the stiffness and transmission error of helical gear
The modification amount of helical gear profile CA = 30 μ m. The helical gear profile modification length La = […]
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Isothermal normalizing process test of carburized gear blank forging waste heat
1.Microstructure and performance requirements of forged gear blank 20CrMnTi is selected as the material of automobile gearbox gear. The technical […]
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Forging folding defect of transmission second shaft gear
Folding is a common defect in gear forging production, which is formed by the local convergence of oxidized metal surfaces […]
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Mathematical model for optimization of forging process parameters of gear blank
The optimization problem in forging process includes two aspects: first, analyze the optimization design problem and establish the corresponding mathematical […]
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Key manufacturing technology of large gear blank
The large gear of converter secondary reducer is the tilting of converter and the main bearing component in the process […]
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Improvement of heat treatment process for forged gear blank
In the original process, the forged gear blank is directly air cooled to room temperature after forging, and then rough […]
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Numerical results of differential eccentric gear based on unequal division model
Programmed and calculated under Matlab, when the number of coordinate points of involute working tooth profile of reference tooth is […]
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Structural characteristics and working mechanism of eccentric gear noncircular gear planetary system transplanting mechanism
The schematic diagram of the eccentric gear non-circular gear planetary system transplanting mechanism is shown in Figure 1. The relative […]
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Asymmetric design process of upper and lower dies for gear blank forging
In the process of gear blank forging, due to the cylindrical upsetting effect of the blank, the contact area between […]
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Improvement of forging process of gear blank
Taking the forging of a large gear blank as an example, the forging drawing is shown in Figure 1, with […]
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Optimization analysis of forging parameters of gear blank
According to the comparative analysis of the four schemes in Figure 1, Φ 100mm bar has the best forming effect […]
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Reference standard for forging forming of gear blanks
The main reference standards for evaluating the final forming quality of gear blanks are as follows: (1) The hub part […]
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Finite element analysis of spiral bevel gear
The setting of finite element preprocessing is very important, which not only determines whether the spiral bevel gear can converge […]
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Finite element analysis scheme of forging gear blank
A gear blank requiring precision forging is studied. The number of teeth of the gear is 29 and the diameter […]
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Step beam automatic feeding system for forged gear blank production
In the traditional forging production, the material is fed manually and positioned by relying on the positioning block with simple […]
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Control of uniform cooling of gear blank by isothermal normalizing
In order to improve the machinability of gears for transmission and stabilize the final heat treatment deformation, a company purchased […]
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Analysis of surface crack of s40c steel gear
According to the above inspection results, the cracking of steel gear tooth surface is caused by contact fatigue caused by […]
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How to prevent gear grinding cracks caused by carburizing and quenching of rolling mill
The gear material of the failed rolling mill is 17CrNiMo6 steel, the modulus Mn is 9mm, the carburizing and quenching […]
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Fracture failure analysis of ZG35CrMo large forged gear blank
Produced by a company φ 2100mm large forged gear blank with a weight of 6000kg was found to be cracked […]
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Analysis of velocity field distribution and evolution law of spiral bevel gear
Velocity field is a vector to measure the flow of material in the process of plastic deformation. Through the observation […]
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Case of gear grinding crack caused by carburizing and quenching of rolling mill
The rolling mill gear shaft with grinding cracks is made of 17CrNiMo6 steel, the modulus Mn is 18mm, the carburizing […]
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Forging process scheme of large module spiral bevel gear
Figure 1 shows the driven bevel gear of rear axle in 46910 / 37 commercial vehicle. It can be seen […]
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Process design and optimization of precision forging technology for spiral bevel gears
The precision forging process of spiral bevel gear generally has some problems, such as difficult forming, difficult cavity filling, low […]
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Effect of burning loss of electrode on electrode tooth profile in precision forming of bevel gear by cold rotary forging
In the process of EDM, the electrode will have a certain amount of burning loss, which will change the electrode […]
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Relationship between feed per revolution s and average pressure P per unit area of contact surface in precision cold rotary forging of bevel gear
When rolling the thick cylinder of the pier, the relationship between the feed rate s per revolution and the average […]
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Relationship between feed rate per revolution s and width BB of active deformation zone in cold rotary forging precision forming of bevel gear
The feed rate per revolution of the cone die is the reduction amount per revolution, which is the reduction amount […]
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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 […]