New technologies and development trends in automotive gear processing
1 Introduction Nowadays, automobiles are attracting attention in terms of their functionality as an indispensable means of transportation in people’s […]
1 Introduction Nowadays, automobiles are attracting attention in terms of their functionality as an indispensable means of transportation in people’s […]
0 Introduction Arc bevel gears have the advantages of high overlap, strong bearing capacity, low vibration, low noise and high
Helical gears are an important part of automobile transmissions, providing driving energy such as rotation, transmission, and torque for automobiles.
Gear is one of the most important structural parts of the aviation transmission system, and the working environment is very
1. Basic physical properties The density and hardness data of the product at 1 300 ° C for 3 h
The experiment adopts the spur gear design shown in the figure. Because it needs to approach the working state of
The calculation example used is a pair of oil-lubricated spiral bevel gears in a helicopter reducer. See Table 1 for
introduction The lubricated condition of the arc bevel gear is critical to the reliability and efficiency of the aircraft’s transmission
0 Introduction The gear-rotor system is one of the commonly used motion and power transmission mechanisms in industry. As the
As the key components of power conversion between shafting transmission, helical bevel gears and hypoid gears directly affect the mechanical
1 Determination of process plan 1.1 Analysis of part structure characteristics Figure 1 is the part diagram of a planetary
1 Meshing stiffness excitation Meshing stiffness is one of the important parameters of gear transmission system, taking the gear of
0 Introduction Gear transmission is widely used in power transmission because of its advantages of high transmission efficiency and accurate
0 Introduction Hypoid gears have the characteristics of large degree of overlap and stable transmission, and are widely used in
Because it is difficult to analyze the speed of spiral bevel gear, it is treated as equivalent spur gear. Make
For the single-tooth model, the tooth surface is divided into the following three types according to the figure, and the
1 Research background Helical bevel gear is a key part of mechanical equipment, widely used in helicopters, automobiles and other
As an important part of gear transmission, the performance of arc bevel gears directly determines the efficiency and service life
1 Introduction Variable angle gearboxes are indispensable support and connection components for transmission lines in aviation systems. At present, domestic
The tooth profile of the involute double-circular-arc helical gear is related to the module, tooth number, pressure angle and tooth
Continuously variable transmission (CVT) has the advantages of simple structure, convenient operation, high transmission efficiency, good constant power characteristics and
0 Preface The reducer for construction lift belongs to the heavy-duty hard tooth surface reducer, the heavy load hard tooth
Arc bevel gear (Gleason system) has the characteristics of high transmission efficiency, compact structure and stable transmission, and is widely
0 Introduction The arc bevel gear adopts shrinking teeth, and the tooth line on the gear production crown wheel is
1 Introduction As a key part in mechanical transmission, bevel gear is widely used in aviation, aerospace, automobile and construction
0 Preface Cylindrical gear transmission is a commonly used mechanical transmission method in electric tool products, through cylindrical gear transmission
0 Introduction Gear transmission has large transmission power, high efficiency, accurate transmission ratio, etcAdvantages, is widely used in mechanical transmission.
preface China is a big country in casting production, the current degree of automation after casting cleaning is low, and
Due to its excellent casting properties, low density and good mechanical properties, sub-eutectic Al-Si alloys are widely used in aerospace
In the static meshing analysis, the influence of the load of spiral bevel gears on the meshing results has been
Titanium alloy is widely used in aerospace, military and other fields, with the rapid development of titanium alloy casting process,
Through the finite element software, output the angle of spiral bevel gear with four types of offset error under three
Transmission error (TE) is the main source of noise of spiral bevel gear system. Studying the transmission error of spiral
1. Grid division Spiral bevel gear has spatial geometric complexity, which makes the volume mesh of spiral bevel gear directly
Installation error and other factors will change the contact mode of the tooth surface from line contact to point contact.
The basic geometric structure of the ideal spiral bevel gear pair is formed by the rolling of two pitch cones,
In view of the universality of FZG gear gluing test, FZG gluing test gear is selected, and GB/Z 6413 1、
The theoretical comparison of the bonding strength of involute cylindrical gears The tooth surface temperature is an important parameter to
Generally speaking, the coincidence degree of the helical gear system is greater than 2, and the continuous gradual involution of
Subject to the layout structure of double-input-single-output gears, as shown in Figure 1, the meshing process of the left and
Because of the existence of helical angle, the meshing stiffness of helical gear changes not only with the change of
The physical model and simplified torsional vibration model of the rigidly supported double-input-single-output helical gear system are shown in the
In order to predict the surface topography generated in each simulation area, the local coordinate system OWXWYWZW attached to the
The parameters of a standard helical gear are shown in the table. According to the formula h, the half-width of
In practical applications, only knowing the thickness of the oil film can not accurately evaluate the lubrication state of the
First, confirm the parameters of lubricating oil. The parameters of lubricating oil commonly used on spiral bevel gears are as
In order to better judge the contact state and stress condition during the spiral bevel gear meshing process and analyze
1. Parameters of complete machine and gear Cylinder diameter/mm Stroke/mm Number of cylinders Rated power/kW Maximum torque / (N ·
The contact strength of the hemispherical bevel gear is characterized by the contact force of the hemispherical bevel gear. The
The stability of hemispherical bevel gear is one of the important factors to be considered in the design of gear
The transmission accuracy of the hemispherical bevel gear is characterized by the dynamic error of the rotation angle. The results
The rigid-flexible coupling method in simulation is used to establish the simulation model of the hemispherical bevel gear system. The
The transmission model of the flexible hemispherical bevel gear is shown in Figure 1. The hemispherical bevel gear 2 is
As shown in Figure (a), the pure rolling between a pair of pitch cones is equivalent to the meshing motion
Taking the driven cone as the research object, the elastic modulus of spiral bevel gear under the design point condition
Taking the driven cone as the research object, when the working condition of 20 132 r/min and 1000 kW is
Taking the driven cone as the research object, when the rotating speed of the fixed spiral bevel gear is 20
Taking the driven cone as the research object, after the numerical calculation of the spiral bevel gear near the design
1. Experimental conditions The experiment adopts a parallel spindle type finishing platform, and the workpiece to be processed is a