Grinding parameter optimization According to the grinding characteristics of grinding wheel, reasonably improve the grinding parameters. Comparison of grinding efficiency […]
Taking MATLAB as a tool, the three-dimensional virtual gear hobbing of high-order elliptical spur gear and helical gear is carried
The heavy-duty gearbox gear bears a great load, which requires the characteristics of stable transmission, low noise and long service
The shape of tool edge is also an important factor affecting the tooth surface roughness in gear hobbing. Two hole
During gear hobbing, the surface quality at the gear root is determined by the fillet radius and rake angle of
Y3150 gear hobbing machine is selected as the experimental equipment, 6542 tungsten molybdenum high-speed steel, class a gear hob with
Because the gear tooth surface roughness is affected by many factors, the results obtained from different tooth surface measurement directions
In order to verify the accuracy and rapidity of the method in this paper, the same gear parameters are used
Based on the parameters of a shearer and combined with the actual operation, the simulation experiment is carried out by
The transmission system of shearer cutting part is mainly composed of cutting motor, cutting drum, fixed shaft gear, gear shaft
When the helical gear is an ideal tooth profile, assuming that there is no backlash between the gear pairs and
In order to realize the new gear cutting method on the general milling machine, a device which can make the
The proposed gear cutting method can be directly realized by using a 5-axis machining center. When the vertical machining center
In the case of machining helical gears, the tool moves along the rotation axis of the gear blank, which is
The helical gear can be regarded as a sheet helical gear. The helical gear is divided into m sheet helical
In this method, the gear parameters, i.e. modulus m, number of teeth Z and pressure angle α ， It can
The proposed method uses a conical end mill as a tool, moves back and forth in the tooth width direction,
Forging process flow of two shaft gear forgings: blanking with band saw（ φ 85mm round steel) → heating in medium
The modification amount of helical gear profile CA = 30 μ m. The helical gear profile modification length La =
1.Microstructure and performance requirements of forged gear blank 20CrMnTi is selected as the material of automobile gearbox gear. The technical
Folding is a common defect in gear forging production, which is formed by the local convergence of oxidized metal surfaces
The optimization problem in forging process includes two aspects: first, analyze the optimization design problem and establish the corresponding mathematical
The large gear of converter secondary reducer is the tilting of converter and the main bearing component in the process
In the original process, the forged gear blank is directly air cooled to room temperature after forging, and then rough
Programmed and calculated under Matlab, when the number of coordinate points of involute working tooth profile of reference tooth is
The schematic diagram of the eccentric gear non-circular gear planetary system transplanting mechanism is shown in Figure 1. The relative
In the process of gear blank forging, due to the cylindrical upsetting effect of the blank, the contact area between
Taking the forging of a large gear blank as an example, the forging drawing is shown in Figure 1, with
According to the comparative analysis of the four schemes in Figure 1, Φ 100mm bar has the best forming effect
The main reference standards for evaluating the final forming quality of gear blanks are as follows: (1) The hub part
The setting of finite element preprocessing is very important, which not only determines whether the spiral bevel gear can converge
A gear blank requiring precision forging is studied. The number of teeth of the gear is 29 and the diameter
In the traditional forging production, the material is fed manually and positioned by relying on the positioning block with simple
In order to improve the machinability of gears for transmission and stabilize the final heat treatment deformation, a company purchased
According to the above inspection results, the cracking of steel gear tooth surface is caused by contact fatigue caused by
The gear material of the failed rolling mill is 17CrNiMo6 steel, the modulus Mn is 9mm, the carburizing and quenching
Produced by a company φ 2100mm large forged gear blank with a weight of 6000kg was found to be cracked
Velocity field is a vector to measure the flow of material in the process of plastic deformation. Through the observation
The rolling mill gear shaft with grinding cracks is made of 17CrNiMo6 steel, the modulus Mn is 18mm, the carburizing
Figure 1 shows the driven bevel gear of rear axle in 46910 / 37 commercial vehicle. It can be seen
The precision forging process of spiral bevel gear generally has some problems, such as difficult forming, difficult cavity filling, low
In the process of EDM, the electrode will have a certain amount of burning loss, which will change the electrode
When rolling the thick cylinder of the pier, the relationship between the feed rate s per revolution and the average
The feed rate per revolution of the cone die is the reduction amount per revolution, which is the reduction amount
For the five kinds of swing head motion trajectories in the figure, they are analyzed one by one as follows:
The motion track of the swing head refers to the projection track of any point on the axis of the
Figure 1 shows the front view of the temperature field on the single tooth profile surface and the middle section
Due to the eccentric load on the workpiece during rotary forging, the metal flow is uneven. If the preform is
The so-called “thick piece” revolving body means that the thickness h is greater than or equal to the radius R
The essence of swing rolling is a special two roll rolling. In the process of rotary forging, although the swing
The cold rotary forging precision forming process of bevel gear is an advanced manufacturing technology. Its process design in actual
The equivalent stress at the crack tip under different crack inclination angles is extracted and plotted, and the equivalent stress
Hypothetical generating wheel is usually used to explain the machining process of bevel gear. It is a virtual bevel gear
Study the crack propagation law when the initial crack position H0 is 60mm, 62mm, 64mm, 66mm, 68mm and 70mm respectively,
In the actual process of gear meshing, the maximum contact stress usually acts on the tooth surface of the pinion.
At 3 000 n · The equivalent time-varying meshing parameters of hypoid gear in one cycle are calculated according to
In order to simulate the singularity and discontinuity of element displacement stress, it is realized by constructing the extended functions
According to the established contact fatigue finite element simulation model of hypoid gear transmission system, the finite element simulation software
Under the influence of crack shape, the change of mode I stress intensity factor is studied. In the process of
Under the set parameters, the gear model is simulated. As shown in the figure, the trend distribution of stress intensity
