Precision plastic forming of helical cylindrical gear
Helical cylindrical gear is an important transmission part widely used in automobile and machinery industry. Its shape is complex, and […]
Helical cylindrical gear is an important transmission part widely used in automobile and machinery industry. Its shape is complex, and […]
Bevel gear swing rolling, namely swing rolling, also known as axial rolling, is a new plastic processing technology gradually and
With the development of mechanics and computer simulation technology, the research on fatigue crack of spur gear has made great
Bevel gear is widely used in mechanical transmission, especially in automobile transmission mechanism. The traditional bevel gear processing adopts the
As a typical transmission part, bevel gear is widely used in many industries, such as aviation, aerospace, automobile, instrument and
According to the statistics of scholars, most of the mechanical component failures belong to fatigue failure, accounting for 50% –
In the process of helicall gear design, CAD / CAM / CAE integrated software UG is adopted. Combining the three-dimensional
The cold extrusion precision plastic forming technology of spur gear has the advantages of saving materials, improving production efficiency, ensuring
(1) The parametric modeling of helical gear is carried out by using three-dimensional modeling software UG. After parametric modeling, helical
Through the numerical simulation analysis of the closed die forging of helical gear, the parameters such as temperature, friction factor,
The three forming process schemes will be comprehensively evaluated and analyzed from the three aspects of material utilization, production efficiency
For a long time, for helical gear designers, the design or development of a process scheme is basically based on
In recent ten years, with the rapid development of computer hardware and software technology and the in-depth study of material
Taking the forging compound forming process of driving and driven spiral bevel gears as the research object, the feasibility of
The main feature of die forging is that the diameter of outer circle and inner hole of automobile rear axle
The precision plastic forming part of spiral gear has high dimensional accuracy and less machining allowance. It only needs a
At present, the research on precision plastic forming of bevel gear and spur gear has made great progress and has
Taking a certain type of automobile rear axle spiral bevel gear as the research object, taking the product part drawing
Y. Qin and R. Balendra used abaques simulation software to study the elastic deformation of the die cavity in the
The precision forming technology of cylindrical gear comes from Germany. As early as the 1950s, due to the lack of
Precision near net shape forming of spiral gear belongs to less and no cutting technology. Due to its outstanding advantages
Taking the sun gear in a truck wheel reducer as the research object, its part drawing and three-dimensional solid model
Spiral gears include spiral cylindrical gear and spiral bevel gear. As one of the most basic parts to transmit motion
1.Open die hot die forging Open die hot die forging is the earliest forging process of driven bevel gear. With
Warm forging of helical gear is a kind of plastic forming process with less and no cutting developed on the
1.Existing process of hot die forging (cross forging) Hot die forging of driving spiral bevel gear blank is the earliest
Because the composite casting and forging process used to produce automobile rear axle spiral bevel gear has not been applied
As the starting point of casting forging compound forming process, whether the process design of casting process and the control
The rolling forming process of spur gear improves the production efficiency and material utilization, shortens the processing process, and the
Research overview of spiral bevel gear forging at home and abroad and the application of numerical simulation technology in spiral
The driving and driven spiral bevel gears of the automobile rear axle are the key parts of the automobile rear
At present, the better process methods for producing the driven helical gear blank of automobile rear axle at home and
Automobile rear axle gear is an important part of automobile drive system. Due to its poor working condition and heavy
The cold / hot forging drawing is determined by the helical gear part drawing. The influence of the tooth shape
Cold extrusion process is a production technology with high precision, high efficiency, high quality and low consumption, which is widely
Based on the design of process flow, the main purpose of closed hot die forging step is to realize the
The basic forming process of spur gear has its own obvious advantages and disadvantages. It can only solve the problems
1.Load stroke curve Figure 1 shows the load stroke curve of preforms with different cold precision forging quantities according to
The optimal parameter scheme is numerically simulated and the forming process is analyzed. The following conclusions are obtained: (1) The
The risk of casting forging compound forming process is controllable and the process predictability is strong; Taking the product part
Germany, Japan and other developed countries began to study the helical gear forming process very early, and the technology is
The basic principle of split flow forging is shown in Figure 1. It is to set up metal overflow channels
Automobile rear axle (also known as drive axle) refers to the rear drive shaft and related components used to transfer
As one of the main transmission parts of automobile, the driven spiral bevel gear of automobile rear axle has great
The process principle of floating die is shown in the figure. It was first put forward in 1987 when scholars
In the forming process of driven spiral bevel gear of automobile rear axle, the practical application process of precision forging
The principle of forward extrusion forming process of spur gear is shown in the figure. Under the action of extrusion
The blank size, forming temperature, forming speed, friction factor and die structure of the precision forging process of the driven
When the forming temperature distribution of the driven gear is different, the forming temperature distribution of the driven gear always
The upsetting extrusion process principle of spur gear is shown in Fig. 1, which means that the tooth punch moves
The figure shows the travel load curves of five blank size schemes, in which (a) (b) (c) (d) (E) correspond
On the premise of the compound forming process of spiral bevel gear hot forging and cold finishing, combined with the
Gear is an important part of the transmission of cars, heavy trucks, motorcycles and other vehicles. There are about 18
In the precision forming process of spiral bevel gear, the fluidity of metal materials is poor, the tooth shape is
Basic parameter setting of helical gear simulation (1) Model material: the material of the selected helical gear blank is 20mncr5,
In the 21st century, the key to whether the automobile industry can win the first opportunity in the fierce competition
After studying and analyzing the research results on the forming of spiral bevel gear at home and abroad, it is
With the rapid development of finite element numerical simulation technology, numerical simulation technology is more and more used in the
As an advanced processing method, precision forging has been widely used in the processing and manufacturing of spur bevel gear
Driven by the goal of high speed and high efficiency, foreign advanced countries have long eliminated the traditional “five knife