Machining simulation of three-axis linkage milling of spiral bevel gear teeth
Based on the establishment of the simplified model, gear blank model and tool model of the gear cutting machine tool, […]
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Profile equation of face gear hobbing
The coordinate system of face gear hobbing is established, as shown in Figure 7. The fixed coordinate system SH0 (xh0,
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Cutting principle of convex tooth surface based on generation line of spiral bevel gear tooth surface
Based on the analysis of the generation principle of convex tooth surface, it can be seen that the convex tooth
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Basic worm equation of spherical hob for face gear
Taking right-hand rotation as an example, the coordinate system for the forming of face gear spherical hob based worm is
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Key geometric elements and names of spiral bevel gears
The tooth profile of spiral bevel gear is mainly composed of concave tooth surface, convex tooth surface, tooth top part
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Design principle of spherical hob based worm for face gear
Similar to the evolution from rack to ordinary gear hob, the evolution process from cylindrical gear to spherical hob based
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Influence of input torque on dynamic equation of bevel gear
In order to consider the influence of torque on the dynamic response of central transmission bevel gear, keep the input
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Tooth surface equation of face gear
The forming of face gear tooth surface is based on the generating cutting of cylindrical spur gear shaper and face
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Common heat treatment defects of gears and their prevention methods
1. Cracks 1) In the carburizing diffusion stage, the carbon potential is high, the carburizing layer carbon concentration is too
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Defects of gear heat treatment and its influence
Whether carburizing quenching, carbonitriding quenching, induction heating quenching or overall heating quenching, the possible heat treatment defects during gear quenching
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Traveling wave vibration speed of bevel gear
After the natural frequency and vibration mode of bevel gear are determined, the resonance speed diagram shown in the figure
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Failure analysis of heat treatment crack of spiral bevel gear
(1) Analysis of crack properties From the crack morphology, the crack originates from the stress concentration. Whether the root of
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Process and results of heat treatment crack failure test of spiral bevel gear
(1) Macro morphology of crack: observe the crack morphology of three pairs of spiral bevel gears from the appearance, as
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Development and types of Involute Gears
Gears are widely used in mechanical transmission devices and are one of the common mechanical parts. Human beings began to
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Calculation of normal deviation of tooth surface of logarithmic spiral bevel gear
When measuring the tooth surface of logarithmic spiral bevel gear, there is an error between the theoretical value and the
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NC programming and machining of spiral bevel gear tooth top rounding
The three-dimensional tooth digital model is obtained through reverse engineering modeling. The digital model only includes tooth width, face cone,
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Defects of gear heat treatment and its influence
Various defects produced during heat treatment of gears will have potential or obvious adverse effects on their quality and service
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First order error of difference surface equation of logarithmic spiral bevel gear
Expressed as the shape error of logarithmic spiral bevel gear, the vertical distance between each measuring point on the real
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Establishment of reverse engineering model of spiral bevel gear
The machining process of spiral bevel gear is to first establish the theoretical mathematical model, then convert the mathematical model
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Processing of data points on tooth surface of logarithmic spiral bevel gear
When the complex data of logarithmic spiral bevel gear tooth surface is obtained by laser scanner, the accuracy of data
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Insufficient hardness of gear core
The center of carburized gear is required to have a certain hardness. When the hardness is low, the yield point
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Comparative analysis of reverse engineering of non-circular gears
Select the seedling taking track in the seedling taking mechanism of double arm second-order free non-circular gear planetary system pot
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The surface hardness of gear is low after quenching
The low surface hardness of carburized gear will reduce the wear resistance and fatigue resistance of gear, and have an
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Uneven carburizing layer depth of gear
The depth of carburizing layer on the gear surface is uneven, resulting in discontinuous performance of different parts. The weak
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The hardened layer of gear is too shallow
The surface hardness of carburized gear is too shallow, which not only reduces the anti peeling performance of surface hardened
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Excessive carburization of gear surface
Due to improper treatment and excessive carburization, massive and network carbides will appear on the surface of carburized gear. When
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Calculation of axial force of hypoid gear pair
For loaded working side: The axial force fax1d of hypoid gear pinion is: The axial force fax2d of hypoid gear
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Causes and preventive measures of metallographic structure and heat treatment defects of rear axle gear
1. Defect content Including coarse martensite, excessive retained austenite as shown in figure (a), excessive surface carbides as shown in
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Accurate modeling of hypoid gear pair with small number of teeth and large reduction ratio
Taking the modeling process of small wheel as an example, this paper introduces the modeling process of hypoid gear with
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Calculation of tangential force of hypoid gear pair
In order to ensure that the working surface of the designed hypoid gear with small number of teeth bears the
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Influence of input torque on dynamic load performance of spiral bevel gear transmission
Other parameters remain unchanged. Under different input torques, the variation of dynamic load coefficient amplitude of spiral bevel gear transmission
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Principle of virtual gear hobbing
As shown in the figure 1, the tool rack pitch line AB is a straight line. During gear hobbing, AB
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Undercut inspection of hypoid gear
In general, undercutting will not occur in the large wheel of hypoid gear with small number of teeth and large
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Hobbing linkage model of high order elliptic helical gear
The feed motion of hobbing helical gear is a helix, which can be divided into the vertical motion VZ of
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Determination of pitch cone of hypoid gear with few teeth
For the design of hypoid gear pair blank with small number of teeth and large reduction ratio, the axle intersection
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Influence of supporting stiffness of driven gear of spiral bevel gear on dynamic load performance of spiral bevel gear transmission
Other parameters remain unchanged. Under different support stiffness of spiral bevel gear driving wheel, the variation of dynamic load coefficient
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Gear hobbing linkage model of high order elliptic spur gear
As shown in the figure, the machine tool coordinate system s (o-xyz) is established. The X axis and Z axis
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Calculation method of natural frequency and vibration mode of spiral bevel gear transmission
The vibration characteristics of mechanical system can usually be described by the natural frequency and vibration mode of the system.
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Hobbing conditions of high order elliptic gears
The gear hobbing condition of non-circular gear is that the pitch curve is not concave, that is, the radius of
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Finite element modeling of spiral bevel gear pair
The meshing stiffness of cylindrical gear is usually calculated as a two-dimensional plane problem. The elastic deformation of single tooth
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Higher order elliptic gear pitch curve equation
Based on the ellipse, keep the polar diameter unchanged, and reduce the polar angle of the ellipse by an integer
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Calculation of meshing stiffness of helical gears
The helical gear is divided into m slice helical gears along the tooth width direction AA ‘, the M slice
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Blank dimensions of spur gears
During precision forging blanking, the blank must be accurate. Due to the large hole of spur gear, there are two
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Angle relation between gear hob and gear
In the process of gear hobbing, according to the ideal processing conditions, that is, without considering any external error, the
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Bench loading test of drive axle hypoid gear
In order to verify the correctness of the drive axle model and LTCA simulation results, the bench loading test is
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Influence of tool radial circular runout error on Gear Hobbing
The tool radial runout error ∆ mainly affects the tooth profile error of the gear. The modeling is shown in
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Load bearing contact area and load transmission error of hypoid gear tooth surface of drive axle
Before LTCA analysis, firstly, the three-dimensional model of hypoid gear needs to be aligned for finite element mesh generation to
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Influence of tool rake angle error on Gear Hobbing
The schematic diagram of tool forefoot error is shown in the figure. When the cutter is grinding, there is an
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Machining error analysis of gear hobbing machine
There are 24 errors affecting the mutual position of gear hob and workpiece, including 12 motion errors and 12 installation
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Design contact area and transmission error of hypoid gear tooth surface of drive axle
Under the actual working condition, due to the meshing dislocation of the drive axle hypoid gear under the load, the
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Meshing misalignment of hypoid gear of drive axle
The installation position of hypoid gear in the drive axle transmission system is shown in Figure 1. The hypoid gear
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Analysis of selecting 6 points at different positions of spiral bevel gear
In order to analyze the material flow and stress conditions at different positions of forged spiral bevel gear, six points
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Characteristics of spur gear parts
The 18CrNiMo7-6 spur gear provided by Zhengzhou Machinery Research Institute is taken as the research object, and the product part
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Analysis of stroke load curve of cold precision forging of spiral bevel gear
During the cold precision forging of spiral bevel gear big wheel, the blank deforms under the loading force of the
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Six point analysis of tooth surface selection for simulated forming of spiral bevel gear
Six points are selected on the tooth surface. Points P1 ~ P3 correspond to three positions on the convex surface
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Experimental results of dynamic characteristics of helical gear transmission system
Since the theoretical model does not carry out finite element modeling on the box, and the effective value of vibration
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Edge trimming of precision forged spiral bevel gear
According to the characteristics of the forging process, the tooth profile of the spiral bevel gear is trimmed, which is
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System dynamic response of synthesizing helical gear profile modification and tooth direction modification
Take the modification amount of helical gear profile CA = 30 μ m. The helical gear profile modification length La
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Improved algorithm for position and length of helical gear meshing line
Zhang Liang et al. Proposed a calculation method for the position and length of helical gear meshing line. Because this
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Establishment of three-dimensional model of cold precision forging spiral bevel gear blank
In actual processing, forging blanks are mostly formed by pre forging. First, the blank is pre forged into a blank