Assembly of double planetary gear transmission
Double planetary gears are used in NW and NGWN planetary transmissions. For a planetary transmission with double planetary gears, in […]
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Contact simulation of face gear
1. Meshing parameters of face gear The meshing parameters of face gear are: modulus M = 5, pressure angle […]
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Research on CNC machining of spiral bevel gear shaping
With the development of electronic technology, computer control technology and numerical control technology, the full digital control of gear shaping […]
Scientific
The influence of die helix angle on workpiece during cross wedge rolling
The helix angle of the forming section of the three working conditions is different. The B2 blank in Table 1 […]
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Modification of long gear shaft machined by gear hobbing machine
Gear shaft and spline shaft are common parts in mechanical equipment. In the mechanical equipment of metal processing, gear hobbing […]
Scientific
Fracture analysis of 40Cr steel gear shaft
40Cr steel gear shaft is the transmission part of small mechanical equipment. Because the gear shaft must bear large torque […]
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Assembly of general planetary gear drive
Transmission principle of this kind of planetary transmission. According to its meshing characteristics, it belongs to NGW type, which is […]
Scientific
Analysis of meshing and interference of tooth surface in parallel connecting rod method and rotation method of spiral cylindrical gear
In order to use three-dimensional model to analyze the meshing of the arc tooth cylindrical gear formed by the two […]
Scientific
Machining method of helical gear: hobbing and shaping
There are many methods of gear machining, such as casting, stamping, overstock and cutting, among which the cutting method is […]
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Determination of contact area of face gear transmission
In face gear transmission, the curvature radii of cylindrical gears on two orthogonal planes are 1k1 () and K2 () […]
Scientific
Experiment on load capacity of unsymmetrical spiral bevel gear of mine reducer
Through theoretical calculation and finite element analysis, the bearing capacity of the double pressure angle asymmetrical spiral bevel gear with […]
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Application of wavelet analysis in fault diagnosis of tractor gearbox
The tractor gearbox is a complex device in the basic components of the whole machine, and the failure rate of […]
Scientific
Mathematical statistics and machining pre quantity of distortion law in gear manufacturing process
1. Statistics of distortion data The distortion of batch gear production has statistical characteristics. In the mass production of gears, […]
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Ultrasonic nondestructive testing technology for large cast steel gears
Ultrasonic testing technology is a common method in the internal quality testing of large steel castings. Because of many defects […]
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Assembly of planetary gear transmission
Planetary gear transmission is an advanced gear transmission device. Compared with fixed shaft gear transmission device, it has the advantages […]
Scientific
Analysis of abnormal fracture failure of large induction hardening cast steel gear
A large-scale induction hardening cast steel gear used in a 100 ton crane of an iron and steel company had […]
Scientific
Graphical description of tooth surface, conjugate tooth surface and contact line of tooth surface
This paper analyzes the tooth surface equation, conjugate tooth surface equation and tooth surface contact line equation of involute arc […]
Scientific
Forming principle of helix of helical gear
The tooth profile of the helical gear is involute on the end face, and in the tooth length direction, it […]
Scientific
Contact locus equation of meshing point of face gear
In the meshing transmission, the rotation angles of the cylindrical gear and the face gear are 1 and […]
Scientific
Machining of asymmetric spiral bevel gear with double pressure angle for mine reducer
From the point of view of meshing mechanism and gear characteristics, due to the change of pressure angle of gear […]
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Study on reducing the noise of tractor gears
Tractor is a kind of strong noise source, which not only pollutes the environment, but also endangers the driver’s health. […]
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The principle of speed change of planetary gear mechanism
Because the single row planetary gear mechanism has two degrees of freedom, it has no fixed transmission ratio and can […]
Scientific
Geometric parameters of involute arc tooth cylindrical gear
Cylindrical gear transmission is one of the most widely used transmission methods in gear mechanism. At present, it has three […]
Scientific
The forming principle and transmission characteristics of helical gear tooth profile curved surface
The helical gear is used to transmit the rotary motion between the parallel axis and the staggered axis, and the […]
Scientific
Welding repair technology for defects of cast steel gears
The welding repair process is suitable for repairing casting defects such as pores, sand holes, slag inclusions, cracks (cold and […]
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Tooth surface equation of face gear
Face gear transmission is a kind of gear transmission in which the cylindrical gear and the bevel gear are meshed. […]
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Meshing principle of unsymmetrical spiral bevel gear for mine reducer
At present, the focus of mining equipment is to lightweight, and the structure of mining mechanical reducer has a significant […]
Scientific
The modification method of tractor gear tooth direction
Tooth profile modification is usually the shape of the drawing, that is, “drum tooth”. Tooth profile modification can be divided […]
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Reasonable selection of materials to effectively avoid gear failure
It can be seen from the analysis that the material of gear is the most fundamental cause of gear failure, […]
Scientific
Classification of spiral bevel gears
The production of spiral bevel gears plays an important role in the modern machinery manufacturing industry. Because of its large […]
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Structure and working principle of planetary gear mechanism
1.Basic structure of planetary gear mechanism There are many types of planetary gear mechanism, the simplest of which is composed […]
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Effect of heat treatment on surface structure and hardness of cast steel gears
With the continuous development of social economy, many industries gradually rise, cast steel gear is an indispensable part of all […]
Scientific
Brief introduction of optimization design method of automobile transmission gear
In the shift process of the manual transmission, the performance required by the shift gears of different gears is not […]
Scientific
The method of precise modification of tractor gear profile
1. Shaving before heat Practice shows that concave phenomenon often occurs in the direction of tooth height during shaving. There […]
Scientific
The cause of gear failure of agricultural tractor
The phenomenon that a part loses its specified function is called failure. The main forms of parts failure can be […]
Scientific
Control of gear distortion by pressure quenching in gear manufacturing
The low life of the bevel gear of automobile rear axle in China is always a big problem. There are […]
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NGW type involute planetary gear drive
Involute planetary gear reducer is a kind of gear transmission with at least one gear moving around a fixed geometric […]
Scientific
Study on Optimization of gear parameters of automobile transmission
With the development of automobile towards high performance, gear system should meet the requirements of high efficiency, high reliability, high […]
Scientific
Modification of tractor gear profile
There are many methods of gear profile modification. According to the accuracy requirements of gear and gear batch, choosing the […]
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Cause of fatigue crack on gearbox of high speed EMU
Based on the acceleration signal of the key parts measured under typical working conditions, the dynamic stress response on the […]
Scientific
The significance of limiting hardenability in gear manufacturing to reduce distortion
1. Test to limit the effect of steel hardenability on distortion 1) Sample The test adopts two sizes of disk-shaped […]
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Basic characteristics of planetary gear mechanism
Through the analysis of the above three kinds of transmission relations, the kinematic characteristics of simple planetary gear mechanism can […]
Scientific
Research significance of gear parameter optimization of automobile transmission
In general, mechanical system is composed of power system, transmission system and executive system, in which the power system provides […]
Scientific
Research and application of tractor gear shaping technology
Due to the influence of manufacturing and installation errors, gear elastic deformation and thermal deformation, gear transmission will produce impact, […]
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Fracture analysis of gear box of high speed EMU
Fatigue failure is one of the most important failure modes in the use of structures. In the process of using, […]
Scientific
Effect of hardenability of steel on distortion in gear manufacturing
The metallurgical factors of steel, such as grain size, non-metallic inclusions, banded structure, hardenability, etc., have an impact on the […]
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Working principle of single row planetary gear mechanism
According to the law of conservation of energy, the algebraic sum of the input and output power of the three […]
Scientific
Optimization design method of gear pair optimization model of automobile transmission
In the shift process of the manual transmission, the performance required by the shift gears of different gears is not […]
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Characteristics of simple planetary gear mechanism
Composition of planetary gear mechanism: Simple (single row) planetary gear mechanism is the basis of transmission mechanism. Usually, the transmission […]
Scientific
Standardized and quantitative evaluation of the life quality index of the gear transmission system of the coal mine machinery
In order to ensure the stable and safe operation of coal mining machinery, the qualitative indexes in the life evaluation […]
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Application of new forming technology in China gear production
Although the traditional gear manufacturing process has been constantly improved, but it always has some inherent disadvantages. Many scholars completely […]
Scientific
Gear manufacturing quenching improves cooling uniformity and reduces distortion
It is the basic principle and method to reduce the distortion of workpiece to make the structure and quality of […]
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Solutions to five common defects in gear machining
In the NC grinder processing industry, the common internal grinding includes bearing ring internal circle processing, gear internal circle processing, […]
Scientific
Problems left over by the optimization design method of automobile transmission gear parameters
Through the study of the forming process of involute spiral tooth surface, and the application of ANSYS parametric language to […]
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Life evaluation index system of coal mine mechanical gear transmission system
The life evaluation of coal mine mechanical gear transmission system involves many aspects such as personnel, equipment and environment. The […]
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Improvement of heat treatment technology in Chinese gear production technology
With the deepening of the process of industrial globalization, environmental protection is another prominent and arduous task in front of […]
Scientific
Fault types of gear transmission system in coal mine machinery
In the gear transmission system which is the most prone to failure in coal mining machinery, the failure ratio of […]
Scientific
Distortion caused by inhomogeneity of quenching and cooling in gear manufacturing
During quenching and cooling, the workpiece will generate volume expansion and large thermal stress and structural stress. If the volume […]
Scientific
Brief introduction of distortion control technology in gear heat treatment
The distortion of gear heat treatment, especially the distortion of carburizing and quenching, makes the gear accuracy greatly reduced. In […]
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Material selection of spiral bevel gear
Spiral bevel gear transmission is to transmit the motion and power between any two shafts in space through the meshing […]