Establishment of Helical Gear Pair Model for Electric Vehicle Reduction Box
1. Helical gear material selection Helical gear materials can be roughly divided into four categories, such as Q235, Q275, 45 […]
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Solution of Herringbone Gear Meshing Stiffness by Finite Element Method
When Abaqus is used to simulate the meshing stiffness of herringbone gear, the calculation accuracy is affected by the increased
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Evaluation of experimental model of herringbone gear symmetry deviation
In order to evaluate the accuracy of the model, the measured results of herringbone gear at 1000r · min ^
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Symmetry deviation of herringbone gear
Herringbone gear is composed of two helical gears with equal helix angle and opposite direction. If the tooth surfaces on
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Basic parameters of planetary gear transmission system
In the research of planetary gear transmission system, the module selection range is usually 1-50 mm. Because the small module
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Raw material characteristics of imported shearer rocker gear
The gear material was sampled, and its chemical composition was analyzed by three testing institutions. The chemical composition index was
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Influence of contact force on temperature of helical gear tooth surface
In order to study the influence of temperature on the contact force of helical gear tooth surface, the tooth surface
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Influence of helical gear tooth surface friction
The friction coefficient of tooth surface in helical gear meshing is f ≤ 0 2. Combined with the relevant research
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Influence of helical gear tooth plastic deformation
Based on the elastic-plastic model, the tooth surface contact force of helical gear under different loads (400, 1000, 1500, 2000N
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Contact analysis of helical gear teeth
The heating flow density is applied to the meshing contact helical gear tooth surface, and the convective heat transfer coefficient
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Contact analysis of helical gear tooth elastic model
The elastic and elastoplastic models can be obtained by inputting two different strain curves. Among them, the elastic model only
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Deviation analysis of parametric modeling for reverse measurement of double circular arc gears
The sources of gear errors are as follows: machining deviation, measurement deviation and wear deviation. In terms of machining, the
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3D modeling of helical gear
By combining the basic involute equation with the involute in the gear machining coordinate system, the involute curve equation of
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Contact stress of spiral bevel gear in limit state
The contact strength is a key link to be considered in the design of spiral bevel gears. The strength calculation
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Basic parameters of spiral bevel gear
Parameter name Parameter value Tooth ratio 31/26 Large end modulus / mm 8.654 Helix angle / (°) 35 Pressure angle
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Machining test of bevel gear tooth top trimming
1. Part installation and positioning Install the NC turntable in the middle of the workbench of the vertical machining center,
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Test preparation of bevel gear tooth top trimming technology
1. Software preparation The secondary development is carried out on the basis of NX software, and a small plug-in is
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Calculation error of large coincidence degree of spiral bevel gear
According to the relevant provisions of GB / T 11365-2019 standard, the specific accuracy values of spiral bevel gears and
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Fatigue simulation evaluation of hypoid gears with super reduction ratio
The established three-dimensional assembly model of super reduction ratio hypoid gear is imported into the finite element software Ansys Workbench.
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An example of the design of spiral bevel gear with large degree of reconnection
Taking the working surface of a pair of spiral bevel gear pairs that can be paired (in which the large
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Preset meshing performance of spiral bevel gear
The main indexes of meshing performance of spiral bevel gears include transmission error, tooth surface impression and design coincidence degree.
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Calculation of starting and final tangent points of gear hob
The positions of the starting and final tangent points of the gear hob along the tooth axis are shown in
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Determination of installation position of gear hob
The starting position of gear hobbing tool installation is shown in the figure. End position of tool channeling: LPO /
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Selection of cutting path for gear hobbing
Calculate the tool travel according to Hoffmeister’s formula: Where: FA — axial tool path of gear hobbing cutting; H1max –
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Determination of the shifting length of gear hobbing hob
As shown in the figure, the tool shifting length of gear hobbing hob is calculated according to the following formula:
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Calculation of the length of generating area of gear hob
The calculation method of the length of the generating area of gear hobbing hob is shown in Figure 1. If:
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Calculation of working length of gear hobbing hob
The cutting process of gear hob should be divided into pre machining area and generating area; Most of the metal
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Selection principle of groove number of gear hob
Gear hobbing multi groove hob is shown in the figure. When using gear hobbing multi groove hob, the following conditions
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Influence of the number of hob slots on the tooth profile error of gear hobbing
The selection of gear hobbing multi groove hob has the following advantages: (1) Gear hob has many grooves and good
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Influence of the number of gear hobs on cutting efficiency
The number of hobs Z0 has an important influence on the machining time In some cases, the use of gear
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Influence of gear hob diameter on gear surface roughness
The selection of large diameter gear hobbing hob has the following advantages: (1) Under the condition of maintaining the same
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Influence of gear hob diameter on cutting efficiency
The relationship between the outer diameter of gear hobbing hob and hobbing time Ht is shown in the figure. Where:
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Calculation of main design angles of gear hob
Theoretically, the larger the rake angle of the gear hobbing hob, the smaller the cutting load of the cutter teeth.
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Cumulative error of groove circumferential pitch of gear hobbing hob
When the rake face of the chip holding groove is unevenly distributed relative to the center of the inner hole
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Original tooth profile angle error of gear hobbing hob
The linear part of the side edge of gear hobbing hob mainly completes the generation of gear tooth profile, but
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Calculation of Friction Arm on Helical Gear Meshing Surface
According to the change rule of the contact lines on the left and right sides of the pitch line in
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Influence of gear hobbing accuracy on gear machining error
The influence of gear hobbing hob accuracy on machining accuracy is shown in the figure. 100% of the total meshing
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Formation mechanism of gear hobbing profile error
Gear hobbing processing and application practice show that the manufacturing errors of machine tools, cutting tools and gear blanks are
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Stress analysis of gear hob shaft
According to the stress analysis of gear hobbing hob, further analyze the stress of gear hobbing hob shaft, as shown
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Cutting pattern and cutting area moment in gear hobbing
The cutting pattern of gear hobbing hob teeth reflects the metal process and tooth profile formation in the cutting groove
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Vibration caused by automobile gear assembly error
The speed of driving wheel is 1200 R / min, the meshing frequency of automobile gear is 160 Hz, the
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Forming method of gear hobbing tooth profile
The forming method of gear hobbing tooth profile is shown in the figure. Starting from the contact cutting between gear
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Vibration caused by natural frequency of automobile gear
All defective automobile gears will produce high-level pulses in operation, which will usually arouse the natural frequency (also known as
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Vibration caused by tooth profile error of automobile gear
The test diagram of vibration amplitude spectrum caused by tooth profile error of automobile gear is shown in Figure 1.
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Experimental results and Discussion on electrochemical corrosion of automotive gears by heat treatment process
At 25 ℃ and 0.001 V / s scanning speed, the Tafel curve of automobile gear test material 20mncr5 steel
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Effect of heat treatment process on salt spray corrosion test results and discussion of Automobile Gears
The 72 h salt spray corrosion surface morphology of 20mncr5 steel, an automobile gear test material after normalizing and isothermal
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Experimental materials and methods of heat treatment process on corrosion performance of Automobile Gears
1. Material preparation The automobile gear steel 20mncr5, which is widely used, is selected as the experimental material. The energy
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Detection of contact area of spiral bevel gear
The size and position of the contact area of spiral bevel gear can reflect the contact performance of spiral bevel
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Measurement of main performance parameters of spiral bevel gear
The variation law of actual speed and torque can reflect the approximate meshing characteristics of spiral bevel gears. In order
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Measurement of loading condition of spiral bevel gear
In order to obtain the real meshing performance of spiral bevel gear in reduction box, the meshing performance parameters were
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Design of spiral bevel gear test bench
The load contact analysis method of spiral bevel gear can quickly and efficiently obtain its meshing transmission characteristics, but the
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Finite element analysis of dynamic contact stress and bending stress of spiral bevel gear
In order to study the influence of different speed and load conditions on the gear stress in the meshing transmission
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Dynamic speed and transmission error of spiral bevel gear
After the calculation, extract the speed change law of spiral bevel gear meshing transmission under various working conditions, as shown
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Finite element modeling of dynamic loading contact analysis of spiral bevel gear
The dynamic loading analysis adopts the same finite element mesh model as the static analysis, but the dynamic explicit analysis
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Contact equation of spiral bevel gear under dynamic loading
The finite element static analysis method can be used to analyze the load contact of spiral bevel gear in detail,
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Theoretical analysis and comparison of static contact stress and bending stress of spiral bevel gear
According to the formula, the value of each calculation coefficient and the basic parameters of spiral bevel gear, the values
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Characterization of Nonlinear Coefficients of Carbon Steel Gears with Different Hardened Layer Thickness
According to the formula, the nonlinear ultrasonic coefficients of different samples are calculated according to the amplitude of the fundamental
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Theoretical calculation and analysis of static contact stress and bending stress of spiral bevel gear
In order to further analyze the tooth surface contact stress and tooth root bending stress of spiral bevel gear under
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Influence of time-varying mesh stiffness mean value on vibration characteristics of high speed helical gear transmission
In order to study the influence of the mean value of time-varying meshing stiffness of helical gears on the vibration
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Finite element analysis of static contact stress and bending stress of spiral bevel gear
The contact stress of tooth surface and the bending stress of tooth root affect the working performance of gear, such