Application of numerical simulation technology in spur gear precision forging
The volume forming of metal is a complex plastic large deformation process. There are geometric nonlinearity caused by large deformation […]
The volume forming of metal is a complex plastic large deformation process. There are geometric nonlinearity caused by large deformation […]
The size of the inner shunt gap is determined by the distance between the lower end face of the punch
1. Present situation of spur gear machining The processing method of face gear is similar to that of ordinary cylindrical
In order to make the gear rotate in both directions, the tooth profiles on both sides of the tooth are
Classification Meshing mode Basic feature Spur gear external meshing, internal meshing, gear and rack The contact line of tooth profile
Spur gear is a classification of gears. According to the relative position and tooth direction of a pair of gear
The microstructure of spur gear tooth profile is deformed by compound forming, and the grain shape and size are also
Figure 1 shows the spur gear processed by the through continuous “cold extrusion + cold shaping” composite forming process. The
Cold extrusion process can produce extrusion parts quickly, continuously and in large quantities. In most cases, extrusion production has realized
In actual production, the forming of workpiece is accompanied by heat generation, and the temperature of die and workpiece will
The sizing belt of shaping die is one of the important process parameters affecting the forming accuracy of spur gear.
The tooth surface is reconstructed according to the numerical simulation results under different cold shaping methods. Compared with the other
Figure 1 shows the equivalent stress distribution of spur gear under different cold shaping methods. During full tooth shaping, the
① Aiming at the problems of serious tooth tip collapse, low material utilization, low forming accuracy and low die service
In previous studies, the ideal model without error is used in the numerical simulation of cold shaping of spur gear.
Taking the spur cylindrical gear for truck wheel reducer as the research object, a new compound forming process scheme of
Sizing belt is one of the key process parameters to ensure the forming of spur gears. Whether the length of
In order to ensure the smooth implementation of cold extrusion production and processing, in addition to having a pair of
The splitting angle thickness is one of the important process parameters in the design of tooth concave die, which has
In the 1950s, gears were mainly obtained by cutting, and the output was very low. At that time, German Burwell
With its convenient operability and accuracy of simulation results, finite element software helps designers greatly shorten the R & D
For a long time, researchers and scholars all over the world have made unremitting efforts on the deformation law analysis,
Improving the service life of cold extrusion die is the key point of precision forming of large modulus spur gear.
Considering the random error interference, the vibration characteristics of spur gear transmission in two cases are compared and analyzed: ①
By optimizing the cold extrusion process parameters of spur gears, spur gears with high forming quality can be obtained, but
Aiming at the problems of large end machining allowance, large tooth tip collapse angle and large forming load in the
Since the change trend of vibration response of driving wheel and driven wheel is consistent, the driving wheel is taken
With the in-depth research on the forming process of spur gears and the continuous development of market demand, the modern
Improving the service life of cold extrusion die is the key point of precision forming of large modulus spur gear.
The actual meshing state of spur gear is shown in Figure 1, and the distance from the node to the
Tooth surface friction parameters of spur gear under random error interference The time-varying friction model on the meshing line of
The error of spur gear mainly includes pitch error and tooth profile error. The pitch error and tooth profile error
As an important transmission part in automobile and machinery industry, the efficiency of traditional machining can not meet the high-speed
In order to study the vibration characteristics of spur gear pair considering the randomness of error and tooth surface friction,
As shown in Figure 1, the 3-DOF bending torsion coupling dynamic model of spur gear pair is established by using
The cold extrusion forming of spur gear refers to the plastic deformation of the metal blank placed in the die
The cold precision forging of spur gear is developed on the basis of cold forging. There is no need to
Warm precision forging process is a precision forging process with forming temperature between 650 ~ 900 ℃. It has the
The application of structured light vision technology to the dimension measurement of mechanical parts can realize the non-contact and accurate
In order to verify the measurement accuracy and accuracy of the proposed structured light vision system for the involute profile
The application of structured light vision measurement technology can realize the three-dimensional non-contact on-line measurement of industrial parts. The calibration
In recent years, the manufacturing industry represented by the automobile industry has developed rapidly in China. As an important part
As the mechanical industry is more and more inclined to require the spur gear system with high speed and low
In coal machinery equipment, many gear devices in China are imported from abroad. With the influence of factors such as
During precision forging blanking, the blank must be accurate. Due to the large hole of spur gear, there are two
The cold extrusion process of spur gear is a net forming or near net forming process. Its production efficiency and
Spur gear is the key component of high-end equipment. The design and manufacture of high life, high performance, high efficiency
The 18CrNiMo7-6 spur gear provided by Zhengzhou Machinery Research Institute is taken as the research object, and the product part
Compared with ordinary die forgings, the shape of precision forgings is more complex, the machining allowance is less or even
The research of fatigue crack is a part of reliability research. In engineering application, it is mainly to predict the
Based on the numerical simulation, the cold extrusion process and die design of spur cylindrical gear (sun gear) are partially
Stack two spur gear ring blanks into the outer tooth female die sleeve, and insert the spur gear ring blank
The external teeth of the part are spur gears and the internal teeth are involute spline teeth. Three forming process
With the rapid development of China’s aerospace, engineering machinery and truck industries, spur gear is an indispensable part of heavy-duty
The module of large spur gear is 40, the number of teeth is 35, the tooth width is 80mm, and
Gear is one of the most widely used parts in mechanical transmission. Its quality and service life directly affect the
The compound forming process of continuous “cold extrusion + cold shaping” of spur gear is studied, mainly for the purpose
The process experiment mold design refers to the mold structure of the finite element model and the main size parameters
The sizing belt of shaping die is one of the important process parameters affecting the forming accuracy of spur gear.
1. Analysis of cold shaping process scheme The cold extrusion die after multi-objective optimization is used for production, and the