Historical background of spiral bevel gear research
Spiral bevel gears have been widely used in many industrial fields, such as aviation, automobile, shipbuilding, construction machinery and so […]
Spiral bevel gears have been widely used in many industrial fields, such as aviation, automobile, shipbuilding, construction machinery and so […]
At present, most of the spiral bevel gears used in China adopt the American Gleason gear system, and its design
i02 is the roll ratio of the machine tool and the process pitch cone of the spiral bevel gear. As
NC machining is a new technology in spiral bevel gear machining. Because of its great technical difficulty, at present, only
The precision forming of bevel gear by cold rotary forging is an advanced gear processing technology adopted in recent years.
The preparation of bevel gear cold rotary forging preform needs three steps: forming, softening annealing and lubrication process design. 1)
In the process of spiral bevel gear machining, the large wheel often adopts the generating method and forming method, and
In the processing program of NC automatic programming language, the part that transforms the tool path generated in the pre-processing
As a typical transmission part, gear is widely used in many industries, such as aviation, aerospace, automobile, instrument and so
In addition to the advantages and disadvantages of spiral bevel gears, hyperbolic gears have the following advantages: 1. Due to
When two moving surfaces s (1) and S (2 When two moving surfaces s (1) and S (2) are driven,
Compared with straight bevel gears, spiral bevel gears have the following advantages. 1. The contact ratio is increased, that is,
When two surfaces s (1) and S (2) are completely conjugate, their relative curvature at the contact point is called
Along the tooth length direction, see whether the big end and the small end of the tooth are consistent to
When two tooth surfaces mesh, the two tooth surfaces must be tangent at a point m in space. It can
Due to the need of use, the position relationship between the axes of a pair of spiral bevel gears is
Let s (T) be a surface moving continuously in space, u and V are its surface parameters. When expressed by
Spiral bevel gear is a kind of complicated gear among all kinds of gears. Because of its special tooth profile,
According to the processing principle of spiral bevel gear, to process the bevel gear on the NC machine tool shown
The machining theory of spiral bevel gear is to get rid of the original Gleason machine tool shaking table, eccentric
The machine tool adjustment of the variable method for machining the small wheel is shown in the figure, and the
1) 42CrMo steel was studied by means of experiment and simulation, and various factors affecting fatigue crack propagation under different
The research of bevel gear in China started relatively late. Since the 1970s, the gear machine tool of Gleason Company
The gear pair model with semicircular initial crack is established. The mode 1 stress intensity factor is calculated when the
Tool position calculation is to calculate the position and attitude of the tool relative to the workpiece (referred to as
The figure is a graph of the leading edge mode I stress intensity factor of a semicircular crack with a
Through the bending fatigue test and corresponding numerical simulation, it is obtained that the fracture of the tooth root is
KlingeInberg company of Germany recently developed a new type of gear cutting machine: KNC/S35, which is a universal CNC spiral
After setting the corresponding analysis conditions, enter the solution analysis stage. After the calculation, you can get the Mises equivalent
Gleason is the main supplier of quasi-hyperboloid bevel gear machine tools. The original Gleason No.116 gear milling machine of the
The pitch distance of the production wheel is R01, the helix angle β 01, and the rolling correction coefficient of
Cracks will first appear at the tooth root of the gear, because when the gear is running, the meshing other
Von Mises proposed for material conditions under complex stress: The shape change energy density is: Therefore, Mises yield condition is:
The history of gear technology can be traced back to 3000-5000 AD, almost synchronized with human history. Gear transmission is
When the small wheel is machined by the variable method, the tooth profile angle of the small wheel cutter head
The normal curvature and short-range torsion of the tooth surface of the pinion at the calculated point M are as
Domestic machine tools for processing spiral bevel gears mainly rely on imports. For example, Shanghai Machine tool Domestic machine tools
The model used for numerical simulation of fatigue crack growth is the same as the compact tensile specimen of 42CrMo
By referring to the national standard GB / t6398-2000 test method for fatigue crack growth rate of metallic materials, the
Let the angular velocities of large and small wheels are: ω G2 and ω G1: The speed of the big
The theory of spiral bevel gear was put forward by E. Wildhaber, M.L. Baxter, a scientist of Glenson Company in
The experimental measurement shows that the lower threshold of fatigue crack growth is 15.29 and 5.08 when the stress ratio
As can be seen from the figure, when the stress ratio r = 0.1 and the fatigue crack length α
Gear production plays a very important role in the modern machinery manufacturing industry, especially in the production of automobiles, aircraft,
The right-hand wheel and the left-hand production wheel are an aligned hyperboloid gear pair, and the tooth surface of the
Elber proposed the concept of crack closure, and used the theory of crack closure to explain the fatigue crack growth
This paper mainly discusses the shaping method and regrinding method of sharp tooth scraping cutter head with hard tooth surface
When the parameters of the motion law of the machine tool are determined, the motion equations can be formed by
Heavy duty gear is the core component of large equipment transmission. It is widely used in mining, metallurgy, building materials,
Professor Zhang Shusen of Liaoning University of engineering and technology put forward a new method of tooth profile design and
The process pitch cone node of the spiral bevel gear coincides with the design pitch cone node, the pitch cone
Since 1982, Hanjiang tool factory and Taiyuan Heavy Machinery Factory have cooperated to study 18 ‘single edge precision cutting cemented
The workpiece coordinate system is established by taking the installation surface of the workpiece gear as the coordinate plane and
Since the 1960s, Japan, the former Soviet Union and some other countries have successively carried out the development and research
The axial section of the cutter head is made, and the coordinate system is established as shown in the figure.
During gear grinding, the surface layer structure of the gear will change, that is, grinding burn. The reason is that
Establish the coordinate system as shown in the figure according to the geometric model of the machine tool. Among them,
Scraping can be defined as such a process, which is to remove the small machining allowance on the hardened tooth
Gear machining usually has direct generating method and indirect generating method. The direct generation method is to make the cutting
Gear lapping is a traditional process. It is a method of micro removal of workpiece surface with free abrasive particles