Selection of cold shaping mode and optimization of shaping amount of spur gear for truck
By optimizing the cold extrusion process parameters of spur gears, spur gears with high forming quality can be obtained, but […]
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
In order to study the influence law of tooth top fillet r on the forming of spur cylindrical gear, the
The die angle is one of the important process parameters in the design of tooth concave die. It is not
The correctness of the finite element model needs to be compared with the actual situation. If the simulation results are
Cold extrusion process is a complex elastic-plastic deformation process with many influencing factors. Die shape, material properties, lubricant selection and
Large module gear in power transmission of heavy industry (m ≥ 3) is essential. With the rapid development of heavy
From the multi-objective optimization of cold extrusion process parameters of spur gear, the influence of shaping quantity on the accuracy
Hot precision forging of spur gear is a precision forming method developed from hot die forging technology. It is mainly
With the rapid development of automobile industry, precision forming of spur gear has become an inevitable trend in the development
Figure 1 shows the front view of the temperature field on the single tooth profile surface and the middle section
Adhesive wear is the most common fault type on the working surface of mechanical system, which often occurs on the
1. Simulation method validation In order to verify the simulation model, the minimum oil film thickness is far less than
1. Basic wear model In the meshing process of gear pair, the relative sliding and rolling occurs between the meshing
When involute spur gear works, it has to go through the process of single tooth meshing and double tooth meshing
When involute spur gear works, it has to go through the process of single tooth meshing and double tooth meshing
In order to better reflect the effect of the test gear on the dynamic response characteristics of the system due
Figure 1 shows the measurement curve of tooth profile deviation of aa-1 gear after fatigue pitting. The measurement results show
Figure 1 shows the measurement curve of tooth profile deviation of aa-1 gear after 8 million times of operation. The
Figure 1 shows the profile deviation measurement curve of aa-1 gear working tooth surface (left tooth surface) after running for
Figure 1 shows the profile deviation measurement curve of aa-1 gear working tooth surface (left tooth surface) after running for
First of all, the professional D80 gear measuring and Testing Center (Figure 1) is used to measure the accuracy of
The main data acquisition method of cylindrical gear fatigue test-bed is to collect and record the data through the real-time
It is a very complicated and random process that gear evolves from the healthy state of tooth surface to fatigue
In order to verify the simulation model, the minimum oil film thickness is far less than the root mean square
In the meshing process of gear pair, the relative sliding and rolling occurs between the meshing tooth surfaces, which causes