The speed of driving wheel is 1200 R / min, the meshing frequency of automobile gear is 160 Hz, the rotation frequency of driving wheel is 125 Hz and the rotation frequency of driven wheel is 25 Hz. (1) The vibration refinement spectrum of automobile gear under normal assembly...
All defective automobile gears will produce high-level pulses in operation, which will usually arouse the natural frequency (also known as natural frequency) of automobile gears. The test diagram of vibration amplitude spectrum caused by natural frequency is shown in the figure. Substitute N1 = 624 R / min and...
The test diagram of vibration amplitude spectrum caused by tooth profile error of automobile gear is shown in Figure 1. Substitute N1 = 624 R / min and N2 = 128 R / min into the formula, F1 = 65.4 Hz and F2 = 12.8 Hz; Substitute into the...
At 25 ℃ and 0.001 V / s scanning speed, the Tafel curve of automobile gear test material 20mncr5 steel after normalizing and isothermal annealing is shown in the figure. It can be seen from the figure that the corrosion potential of the material after normalizing treatment in 0.6mol/l...
The 72 h salt spray corrosion surface morphology of 20mncr5 steel, an automobile gear test material after normalizing and isothermal annealing, is shown in Figure. It can be seen that after 72 h salt spray corrosion, a large number of corrosion points appear on the surface of 20mncr5 steel,...
1. Material preparation The automobile gear steel 20mncr5, which is widely used, is selected as the experimental material. The energy dispersion X-ray fluorescence analyzer is used to analyze the composition of the prepared test material. The results are shown in Table 1, which meets the composition design requirements of...
Driven by the rapid development of automobile industry, China’s automobile gear manufacturing industry shows sustained and rapid growth. According to the preliminary statistics of 56 major domestic automobile gear enterprises, the annual output of automobile gears has exceeded 80 million pieces, and China has become a large automobile gear...
The vibration experiment of automobile gear adopts SSA signal and analysis software combined with acceleration sensor to test the vibration of automobile gear. It mainly includes two parts: hardware device and software analysis. 1. Design of hardware device Hardware devices include mechanical, conversion and measurement devices. The mechanical device...
On the rear axle main reducer of modern automobile, the most widely used gear is hypoid gear, which is characterized by the spatial intersection of the axes of the driving and driven wheels (small and large gears), and the spatial intersection angle is 90 °. The driving wheel is...
With the requirements of light-duty and high-performance automobile, the development of automobile industry puts forward new requirements for gear materials. Automotive gear steel is mainly developing in the direction of high purity, narrow hardenability band, fine grain, easy machining and easy cutting, and the lightweight of automotive gear material...