Numerical simulation of fatigue propagation of mode I crack in compact tensile specimen of heavy load transmission gear
The model used for numerical simulation of fatigue crack growth is the same as the compact tensile specimen of 42CrMo […]
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Mode I crack fatigue growth test and fracture morphology analysis of compact tensile specimen of heavy load transmission gear
By referring to the national standard GB / t6398-2000 test method for fatigue crack growth rate of metallic materials, the
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Induced curvature of large and small Gear Tooth Surface at the calculated Point of Spiral Bevel Gear
Let the angular velocities of large and small wheels are: ω G2 and ω G1: The speed of the big
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The purpose and significance of studying Bevel Gear Machining Machine tool
The theory of spiral bevel gear was put forward by E. Wildhaber, M.L. Baxter, a scientist of Glenson Company in
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Fatigue crack growth rate formula of heavy transmission gear under different stress ratio
The experimental measurement shows that the lower threshold of fatigue crack growth is 15.29 and 5.08 when the stress ratio
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Experimental study on fatigue crack growth rate of heavy transmission gear under different stress ratios
As can be seen from the figure, when the stress ratio r = 0.1 and the fatigue crack length α
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The production of bevel gears in China is growing rapidly
Gear production plays a very important role in the modern machinery manufacturing industry, especially in the production of automobiles, aircraft,
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Tooth surface curvature of spiral bevel gear
The right-hand wheel and the left-hand production wheel are an aligned hyperboloid gear pair, and the tooth surface of the
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Fatigue crack propagation of heavy load transmission gear
Elber proposed the concept of crack closure, and used the theory of crack closure to explain the fatigue crack growth
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Shaping and regrinding method of sharp tooth scraping cutter head with hard tooth surface of spiral bevel gear
This paper mainly discusses the shaping method and regrinding method of sharp tooth scraping cutter head with hard tooth surface
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Calculation of Tooth Surface coordinates of Spiral Bevel Gear
When the parameters of the motion law of the machine tool are determined, the motion equations can be formed by
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Heavy duty transmission gear is the core component of large equipment transmission
Heavy duty gear is the core component of large equipment transmission. It is widely used in mining, metallurgy, building materials,
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New tooth profile design and regrinding compensation method of sharp tooth scraping cutter head of spiral bevel gear
Professor Zhang Shusen of Liaoning University of engineering and technology put forward a new method of tooth profile design and
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Parameters of spiral bevel gear big wheel machine tool
The process pitch cone node of the spiral bevel gear coincides with the design pitch cone node, the pitch cone
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Development of scraping machining of hard tooth surface of spiral bevel gear in China
Since 1982, Hanjiang tool factory and Taiyuan Heavy Machinery Factory have cooperated to study 18 ‘single edge precision cutting cemented
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Establishment and discretization of Tooth Surface equation of Spiral Bevel Gear
The workpiece coordinate system is established by taking the installation surface of the workpiece gear as the coordinate plane and
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Development and present situation of scraping machining of hard tooth surface of spiral bevel gear abroad
Since the 1960s, Japan, the former Soviet Union and some other countries have successively carried out the development and research
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Cutting Surface equation of Spiral Bevel Gear Cutter head
The axial section of the cutter head is made, and the coordinate system is established as shown in the figure.
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Comparison between scraping and grinding of hard tooth surface of spiral bevel gear
During gear grinding, the surface layer structure of the gear will change, that is, grinding burn. The reason is that
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Mathematical Model of NC Machine tool for Spiral Bevel Gear
Establish the coordinate system as shown in the figure according to the geometric model of the machine tool. Among them,
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Scraping machining of hard tooth surface of spiral bevel gear
Scraping can be defined as such a process, which is to remove the small machining allowance on the hardened tooth
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Direct and indirect generating method of Spiral Bevel Gear and hypoid Gear
Gear machining usually has direct generating method and indirect generating method. The direct generation method is to make the cutting
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Gear lapping and grinding of hard tooth surface of spiral bevel gear
Gear lapping is a traditional process. It is a method of micro removal of workpiece surface with free abrasive particles
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Development processing method of Spiral Bevel Gear and hypoid Gear
Spiral bevel gears and hypoid gears are on hypoid machine tools. The design principle of this machine tool is shown
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Influence of configuration principle of gear hobbing on error characteristics of large involute helical gear
The mentioned feature line family is also of great significance to study the machining principle of gear profile, because any
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Constraint conditions of working tooth surface of spiral bevel gear
When the gear pair is driven, the meshing point of the tooth surface expands into an approximate elliptical contact area
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The test of non-circular gear accurate transmission design result of a kind of stepless transmission mechanism
1. Simulation of gear shaping In order to verify the correctness of non-circular gear profile, matlab programming is used to
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Error characteristics of large involute gear profile
The involute profile is involute, and the helical profile is involute. From the perspective of engineering, in order to understand
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Solving the profile of noncircular gear
The formula is the calculation equation of non-circular gear profile (XCK, yck), and (XG, YG) is the involute profile of
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Key technical problems of on-line measurement of large gears
Based on the general guiding ideology and on the basis of fully considering the characteristics and difficulties of the proposed
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Design of tooth root transition curve of noncircular gear
Generally, transition curve should be designed for gear root, which can reduce stress concentration and improve gear bearing capacity. There
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Precise measurement of large gears
Based on the large wheel processing equipment (large gear hobbing machine), the precision measurement of large gears is studied. The
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Tooth profile design of noncircular gear shaper cutter
As shown in Figure 1, OC is the center of gear shaper cutter, G is any point on the initial
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Frame idea of on-machine measurement of large gears
The main measurement methods of large gears are summarized. Based on the analysis, it is concluded that on-machine measurement has
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Solving the movement track of gear shaper cutter center by noncircular gear
When the gear shaper cutter Hobbes the non-circular gear, its indexing circle does pure rolling on the pitch curve of
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Tooth load distribution of spiral bevel gear
Spiral bevel gears are widely used in aviation, automobile, shipbuilding and other industries. When considering the load distribution of multi
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Characteristics and difficulties of large gear measurement
The characteristics and measurement difficulties of large-size gears are analyzed, which can be divided into the following aspects: (1) Oversized
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Flexibility matrix and stiffness matrix of contact finite element model of spiral bevel gear
The flexibility matrix method is used to solve the three-dimensional elastic contact problem. The solution of the contact problem of
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Solving pitch curve curvature radius of noncircular gear and selecting gear shaper cutter parameters
The design methods of non-circular gear tooth profile mainly include envelope method, hobbing tooth profile normal method and shaping tooth
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Solving arc length of pitch curve of noncircular gear
Suppose that the pitch curve arc lengths of the driving and driven noncircular gears are S1 and S2, respectively The
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Classification of large gears
Generally, the gear whose parameters, size and weight are large enough to exceed the conventional conditions is called large gear.
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Solving pitch curve of noncircular gear
As shown in Figure 1, P is the initial meshing point of the non-circular gear, O1 and O2 are the
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Principle and method of on machine measurement of large gear
The particularity of large gear and its measurement is analyzed in detail, and the principle and key technology of gear
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Kinematics simulation of pure rolling internal meshing line gear based on cylindrical helix
According to the tooth surface generation method of parallel shaft internal meshing linear gear and pure rolling meshing condition introduced
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Tooth surface construction of parallel shaft pure rolling gear
The different choice of sign in the tooth profile section curve equation will affect the convexity and convexity of tooth
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Technological normal curvature and short-range torsion of spiral bevel gears
The obtained normal curvature and short-range torsion Aa1, BA1 and CA1 are along the direction of EA1 and TA1. Let
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Comprehensive measurement method and technology of large gear
The comprehensive measurement method and technology of large gears are still developed from the comprehensive measurement of medium and small
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Tooth surface equation of parallel shaft pure rolling gear
Taking the points on the contact lines R1 and R2 as the coordinate origin and the base vectors of fixture
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Measurement of large gear with side gauge
The side measuring instrument is positioned and installed on the machine tool (generally installed on the tool holder) to realize
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Prospect of spiral bevel gear NC Machining Technology
Because the research idea is novel, the electromechanical combination involves a wide range, and needs solid mathematical theoretical knowledge, especially
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Establishment of conjugate contact line for parallel shaft pure rolling internal meshing line gear
Establish the space right-handed coordinate system, as shown in the figure. The installation center distance of linear gear pair is
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Measurement of large gear with top mounted measuring instrument
Aiming at the limitations of desktop measuring instrument, the upper measuring instrument has a great change in the measurement idea.
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Improvement measures and validity verification of forging crack of a fuel gear pump shell
According to the cause analysis of the shell forging crack, the forging deformation is increased by increasing the forging process,
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Desktop instrument for measuring large gears
Desktop instrument the desktop measuring instrument used for large gear measurement is basically the amplification of the desktop measuring instrument
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Principle of combined measurement for super large gear
The combined measurement network of super large gear includes laser tracker and its measurement system, flexible joint coordinate measuring arm
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Principle and technology of on machine measurement of large gear
Gear is famous for its complex shape all the time, and its various error inspection items are not only various,
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Finding the proper measuring ball diameter of helical gear
Diagramming the imaginary circle diameter DPT of helical gear measuring ball The figure is a diagram of the imaginary circle
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Common methods to solve gear contact problems
The establishment of the mechanical model simplified the gear tooth as a cantilever beam, and the contact state under load
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Tooth loaded contact analysis (LTCA) has become an important gear design technology
With the development of machinery industry, the gear transmission with compact structure, long life and suitable for heavy load and
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The conversion formula for calculating the diameter of measuring ball of helical gear end profile
The figure shows the geometric relationship of the measuring ball in the alveolar. The N-N section is the normal section