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A transmission welding gear strength and fatigue life calculation method

A technology for welding gears and fatigue life, applied in computing, instrumentation, electrical and digital data processing, etc., can solve the problem that the actual life of welding gears varies greatly, and achieve the effect of avoiding repeated research and development, saving social resources, and improving accuracy.

Active Publication Date: 2019-06-14
GETRAG JIANGXI TRANSMISSION
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Problems solved by technology

At present, the common practice is to use a simple single-condition limit calculation method, and the calculation result is quite different from the actual life of the welded gear.

Method used

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  • A transmission welding gear strength and fatigue life calculation method
  • A transmission welding gear strength and fatigue life calculation method
  • A transmission welding gear strength and fatigue life calculation method

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Embodiment Construction

[0014] The present invention will be further described in conjunction with accompanying drawing and embodiment now. see Figure 1 to Figure 5 , a method for calculating the strength and fatigue life of transmission welded gears, including finite element analysis modeling 1, static strength calculation 2 and fatigue life calculation 3:

[0015] The first part, finite element analysis modeling 1, is completed by establishing an analytical geometric model 101 , dividing the network and setting contacts 102 , setting material properties 103 and setting boundary conditions 104 .

[0016] First, establish an accurate geometric model of the transmission shaft 21, the synchronizer hub 22, the gear sleeve 23, the combined ring gear 24, the welding gear 25 and the needle bearing 26 (such as figure 2 As shown), the dimensional tolerance of the external spline on the transmission shaft 21 is taken as the maximum upper deviation, and the dimensional tolerance of the inner spline of the s...

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Abstract

The invention discloses a transmission welding gear strength and fatigue life calculation method, including the finite element analysis modeling, the strength calculation and the fatigue life calculation. The finite element analysis modeling is to establish the finite element models of a transmission shaft, a synchronizer gear hub, a gear sleeve, a combination gear ring, a welding gear and a needle roller bearing, the strength calculation is characterized in that the top of the gear is taken as a zero point, one point is clockwise taken on a pitch circle at the gear meshing position at intervals of 20 degrees to serve as a loading position, and the stress results at different meshing positions are calculated. According to the fatigue life calculation, the fatigue life of all the torque levels is superposed according to the calculation results of the static strength at different meshing positions, so that the fatigue life of the welded gear under the corresponding load spectrum is obtained. According to the method, the accuracy of the strength calculation and the fatigue life calculation of the welded gear is improved, the defects in the prior art are overcome, the repeated researchand development are avoided, the social resources are saved, and the technical progress is promoted.

Description

technical field [0001] The invention relates to a transmission welding gear manufacturing technology, in particular to a method for calculating the strength and fatigue life of a transmission welding gear. Background technique [0002] Welded gears have the advantages of light weight, small size, less processing difficulty, saving raw materials, and short production cycle, so they have been widely used in light vehicle and passenger car transmissions. The transmission welding gear is subject to alternating impact loads, which requires good comprehensive mechanical properties. In order to reduce the development cost and shorten the development cycle, it is necessary to carry out design verification through calculation in the design stage of the vehicle. At present, the usual practice is to use a simple single-condition limit calculation method, and the calculation result is quite different from the actual life of the welded gear. Contents of the invention [0003] The pur...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 淦吉昌王文光何建涛郭媛
Owner GETRAG JIANGXI TRANSMISSION
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