Helical cylindrical gear and its transmission
Helical cylindrical gear The cylindrical gear whose tooth line is helix is called helical cylindrical gear, which is abbreviated as […]
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Selection of the datum and determination of the precision of the spiral bevel gear
1) Selection of rough datum According to the principle of selection: (1) Principle of non machined surfaces. (2) The principle […]
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Calculation of geometric dimension of involute standard spur gear
Geometric dimension calculation of standard spur gear Name Code Calculation formula Tooth shape angle α 20 ° for standard gear […]
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Analysis and design of the processing procedure for spiral bevel gear
Selection of blank, determination of dimension and accuracy· Determination of blank type: generally, 20grmnti alloy steel is used for automobile […]
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Basic parameters of involute standard spur gear
Names of gear parts 1.Cogging: the space between two adjacent cogs on a gear. 2.Addendum circle: the circle at the […]
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Description of involute profile of the most complete gear transmission
The basic requirements of gear transmission for tooth profile curve First, the transmission should be stable; second, the bearing capacity […]
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The function of spiral bevel gear
Spiral bevel gear is one of the main parts of machine parts, which is used for motion and power transmission. […]
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Structure characteristics of pitchgear hob
At present, all gear hobs are Archimedes, and the basic worm is Archimedes worm. This kind of hob is similar […]
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Single head worm gear hob and multi head worm machining
Because it is difficult to manufacture the multi head worm gear hob, and it is not easy to manufacture accurately, […]
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Type and application of gear transmission
I. Concept Gear mechanism is composed of gear pair to transmit motion and power. 2、 Type of gear drive There […]
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Determining the modification coefficient of two gears
① ② Selection of normal face modification coefficient of pinion Selection principles: (1) when the hardness of the gear surface […]
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Comparison between single head hob and multi head hob
In pitchgear machining, full cut hob is often used. Although the cutting amount of hob increases, the cutting force will […]
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Calculate the pressure angle of dividing cylinder, base cylinder and pitch cylinder, normal surface and end pitch circle of gear
① Spiral angle of two gears: β1=0.5×（Σ-1） β2=β1 ② Two gear indexing cylinder helix angle: ③ Two gear base cylinder […]
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Comparison between full cut and non full cut hobs
The essence of worm gear hob is a worm meshed with the worm gear to be machined, but its outer […]
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Assembly of planetary gear transmission with small tooth difference
The involute planetary gear reducer with small tooth difference has been developed recently, and its application range is gradually expanding, […]
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Design of helical gear transmission based on MATLAB
1.The establishment of the mathematical model of gear transmission design generally includes three parts: (1) design variables: the basic geometric […]
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Design principle of gear hobbing fixture
When the accuracy of machine tool and hob meet the requirements, the fixture manufacturing and installation accuracy are the main […]
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Force analysis of helical gear
The figure shows a pair of helical cylindrical gears. If the friction between tooth surfaces is omitted, the normal force […]
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Necessary conditions for the operation of gear drive chain
Gear transmission mechanism with large transmission ratio is often composed of many single-stage gears. The sum of these gears and […]
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Advantages of cepstrum analysis in gear fault diagnosis
Cepstrum analysis plays a special role in gear fault diagnosis, especially in side band analysis. Because the frequency spectrum of […]
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Effective measures to solve carburizing defects of gears
(1) Strengthen the gear cleaning before carburizing Generally, the material for making gear is metal material. In order to prevent […]
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Amplitude modulation of industrial gears
All kinds of faults of gears are embodied in a transmission error in operation, that is, the difference between the […]
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Basic design of helical gear drive system
In the optimization design of mechanical design, the methods of advance and retreat, golden section method, conjugate gradient method, coordinate […]
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Fracture failure of bevel gear
The 18crmnti material is used for bevel gear of car. After carburizing and quenching, it is tempered at low temperature. […]
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Related tests and causes of gear white spot defects
(1) Introduction to various tests It is difficult to distinguish the white spot defects of gears by naked eyes. It […]
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Shaft diameter of each section of gear shaft
When the shoulder is used to locate the parts on the shaft and bear the internal force, it should have […]
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Gear failure of drum shearer
The gear material of the edw-300-l drum shearer is 17crnim06e steel. The heat treatment process is quenching and tempering, and […]
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Helical gear transmission features
(1) As long as the helix angle is changed, the diameter of two wheels can be selected arbitrarily to meet […]
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Diesel engine gear failure
The failed diesel engine was installed on the fishing boat, with the power of 198 kW and the working speed […]
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Fault diagnosis of gear wavelet analysis
As a new mathematical theory and method, wavelet transform has been widely used in many fields. In vibration signal analysis, […]
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Fault diagnosis of gear by cepstrum analysis and envelope analysis
Gear cepstrum analysis The frequency spectrum of gear vibration is usually represented by meshing frequency and harmonic sideband, which is […]
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Characteristics, causes and preventive measures of gear grinding cracks
Features: produced in the grinding process, there are almost parallel short cracks or network cracks on the tooth surface. Parallel […]
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Failure of gear core of electric rock drill
The gear core of the electric rock drill is composed of 11 parts. During its operation, it is required to […]
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Time domain method for gear fault diagnosis
In the process of condition monitoring and fault diagnosis, we often use the vibration time domain signal directly to analyze […]
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The main differences between straight bevel gear and spiral bevel gear are as follows
1.Because of the manufacturing error, the instantaneous speed of the straight tooth transmission changes, which is mainly caused by the […]
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Technological analysis and technical requirement analysis of spiral bevel gear
Working conditions and performance requirements of spiral bevel gear; The spiral bevel gear plays the role of transmitting power and […]
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Characteristics, causes and preventive measures of gear crack caused by quench
Features: produced during quenching, most of them are hairy and sometimes self expanding. Some of the cracks are along the […]
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Fracture failure of gearbox shaft of ocean going freighter
The new imported ocean going freighter has been in operation for 36 days from trial run to service. During the […]
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Characteristics, causes and preventive measures of gear rim and plate crack
Feature: flange crack usually occurs at the root between two adjacent teeth. Some of the web cracks are caused by […]
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Graphic analysis of gear impact damage
Impact defects are generally caused by heavy loads caused by rough handling. It usually occurs at or near the root […]
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Comparison of spur gear and helical gear in gear reducer
Comparison of spur gear and helical gear in gear reducer 1.It is difficult and uneconomical to make and assemble a […]
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Vibration fault of industrial gear
When the gear has a large period fault, such as motion eccentricity and geometric eccentricity, the frequency spectrum of the […]
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Gear defect – accumulated false closing error of pitch out of tolerance
Main cause The maximum error of uneven rotation in each rotation of the gear hobbing machine table is too large: […]
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Lathe gearbox gear failure
The lathe with invalid gear is made in Japan, the surface of the gear is carburized, and it has been […]
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Brief introduction of gear carburizing process
In recent years, China’s industrialization process is speeding up, science and technology have been widely used in automatic production, and […]
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Characteristics, causes and preventive measures of gear fatigue crack
Features: the stress is repeated alternation; the crack source is usually the stress concentration on the surface of gear, such […]
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Graphic analysis of gear fatigue
Fatigue is usually caused by repeated and excessive load, which is often broken at or near the root of gear. […]
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Modeling and analysis of spur gear
This section will introduce the method of parametric creation of spur gears. The process of parametric creation of gears is […]
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Generation of spur gear vibration
In the process of gear transmission and meshing, there are many reasons that affect the vibration of gear, including large […]
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Gear defect – tooth direction error out of tolerance
Main cause The deviation between the vertical feed direction of hob and the axis direction of inner hole of gear […]
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Automobile gearbox gear failure
The failure gear is the first gear of the gearbox of the truck, which is made of the carburizing steel. […]
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Gear corrugation, arris and cold deformation
The corrugation, arris and cold deformation of gears are less, and the damage seems less. They show a surface state […]
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Crack analysis of 45 steel tooth blank
The 45 steel gear blank is directly roughened into a column shape with an outer diameter of φ 78mm after […]
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Advantages of worm gear drive
Compared with bevel gear drive, worm gear drive has the following advantages: (1) In the case of small outline size […]
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Modulation heat treatment process of 45 steel in gear manufacturing
Quenching and tempering is the double heat treatment of quenching and high temperature tempering, which aims to make the workpiece […]
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Gear defect – ring gear runout out out of tolerance
Main cause The center of the inner hole of the workpiece does not coincide with the turning center of the […]
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The gears produce pitting, peeling and the carburized layer is broken
The pitting point is a kind of fatigue defect, which occurs when small particles on the gear fall off from […]
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The computer drawing method of standard spur gear profile
In gear processing, we often use the tooth profile template when checking the tooth profile. In the past, in this […]
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Analysis of advantages and disadvantages of gear transmission
Gear transmission is the most common mechanical transmission in modern machines. It is a main form of transmission of machine […]
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Gear defect – incorrect number of teeth
Main cause 1) Incorrect adjustment of split exchange gear 2) Wrong selection of hob 3) Incorrect workpiece blank size 4) […]