Accurate three-dimensional geometric model of cylindrical helical gear is the precondition of establishing heat transfer-deformation coupling finite element model.The basic […]
During the installation test of a large helical gear of a loader drive axle during its development, it was found
The development of gear machinery manufacturing industry in the world can be divided into three stages according to the characteristics
The figure shows the load stroke curve of the cylindrical helical gear during hot forging.At the early stage of forming,
Cylindrical helical gears are widely used in ship, automobile, aviation and other industries because of their smooth transmission, good engagement
In mechanical transmission system, gear transmission system is the most widely used in power and motion transmission devices.Time-varying meshing stiffness
In many important fields such as industrial production, aerospace and military equipment, precision gear processing technology plays a key role,
Forming grinding of spur gears is to trim the grinding wheel into an outer profile exactly the same as the
Gear is one of the most important parts in modern industrial production. In mass production of gears, on-line measurement and
Gears are widely used in mechanical transmission. Due to the existence of tooth friction, the tooth contact temperature of the
The overall configuration of the main reducer of a helicopter’s coaxial gear split torsional transmission is shown in Figure 1.
The coaxial gear split torque drive is a new type of helicopter main reducer. The enhanced rotorcraft drive system program
Due to the crisis of aging population and the sharp decrease of agricultural labor force, China attaches more and more
In order to reduce the unstable factors, the designer thought of the gear transmission technology, which is different from the
For decades, the main structure of civil aircraft engine has not changed until the appearance of gear transmission technology. Gear
In particular, the plan proposes to implement a special plan for improving the quality of gear steel. At present, the
In the “13th five year plan” for the development of China’s gear industry (hereinafter referred to as the “plan”) previously
Recently, Professor Zhang Ruifen of ZHY gear said at a gear industry seminar: “there are many fundamental technical problems of
In recent years, the gear industry is asking a question, where is the development direction of the industry? Where is
In the meshing process of involute gear teeth, the linear speed at a certain meshing point is different, except for
Gear is a key basic component with large quantity and wide range, which is almost used in various fields of
The manufacturing technology of face gear is based on their manufacturing principles, which can be divided into three categories: Based
Abnormal noise is a common fault of tractor chassis. The abnormal noise is mainly caused by the damage of the
Shot peening is an important key link in gear production and manufacturing. When the steel shot repeatedly impacts the tooth
In recent years, Professor Tang Jinyuan’s team has explored the generalization of cutters for the processing of single piece and
The coil spring can be divided into compression spring, torsion spring and tension spring according to the different loading conditions.
Gear is a key structural part in modern transmission technology, its main function is to transmit torque reliably and without
The correct heat treatment process must have the corresponding heat treatment equipment to ensure that the Shanghai brand car, Shanghai
There are many kinds of rolling bearings used in agricultural machinery. Only taking single row radial ball bearing and single
As the core part of most machines, the performance of gears directly determines the degree of mechanical excellence. In the
The service life of automobile and tractor gears is related to many factors, such as steel material, forging quality, precision
In the future, the trend of automobile gear production plant will be toward design informatization, equipment intelligence, process automation, management
Gear is an important part of agricultural machinery, which has a wide range of applications. Although the working conditions of
Since the meshing line coincides with the common normal line of the tooth profile, and it is a fixed line,
In mechanical transmission, compared with other transmission devices, gear transmission has the highest efficiency. However, with the increase of transmission
The gears of automobile and tractor are the basic parts with large quantity and wide range. In 1972, China produced
The parameters of the steering mechanism of a model with rack and pinion steering mechanism are as follows: the wheel
At present, China’s agricultural machinery repair is mainly replacement repair, which can not be separated from disassembly. Disassembly and installation
Gear transmission is the most common mechanical transmission in modern machines. It is a main form of transmission of machine
At present, the steering mechanism used in automobile can not fully meet the Ackerman steering principle, and can not realize
1) There is noise during operation. The causes of the running noise of the transmission case specifically include: the transmission
1) Difficult to shift. The gearshift difficulty caused by gearbox is usually caused by excessive wear or deformation of the
There are two possibilities for the design water depth to be higher or lower than 3.5m in each ascending or
Michalec, a British scholar, defines a high-quality gear with a tolerance of 0.0254-0.002 54 mm (0.001-0.0001 inch) as a precision
Gear transmission of torque and power depends on the engagement of teeth, which is an important mechanical transmission part widely
1. Correction of gear distortion After carburizing and quenching, generally speaking, the increase of internal and external diameter is related
The face gear transmission is a kind of transmission in which the cylindrical gear and the face gear mesh, which
The ship lift of the Three Gorges project is located on the left bank of the Three Gorges Project and
At present, the rack and pinion multi-functional drilling rig developed by TTS sense in Norway, American augers in the United
Since EDM company of Norway (became part of TTS sense company in 2007) launched 250K rack and pinion workover rig
As human history enters the 21st century, it has become a consensus to build a digital earth. Manufacturing informatization brings
After the founding of new China, especially since the reform and opening up, the technology of gear transmission has made
As we all know, China is an ancient country with thousands of years of civilization history, and it is no
With the development of iron and steel, petrochemical industry, ship industry, electric power industry and automobile industry, all kinds of
1. Numerical simulation and scientific problems of gear surface strengthening In the field of scientific research and engineering technology, numerical
What are the characteristics of the straight bevel gear mechanism? Answer: 1) transfer the motion and power between two intersecting
Shot peening is a widely used method to improve the fatigue strength of gears, which can produce compression deformation on
What are the characteristics of worm gear mechanism? Answer: (1) transfer the motion and power between the spatial staggered axes,
The finite element mesh generation of contact is realized. In order to obtain more accurate contact stress of gear teeth,
How is the profile of helical involute curved surface of helical gear formed? Answer: when the generating surface of the
