Coating on multiple keys of vehicle driving shaft and thermal coating process
A transmission shaft and internal spline technology, applied in coating, powder coating, devices for coating liquid on the surface, etc., can solve the problems of high transmission noise, high torsional resistance, poor dynamic balance, etc., and reduce transmission noise. , The effect of reducing the torsion resistance and improving the dynamic balance performance
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Embodiment 1
[0008] The coating material required by the present invention is selected as nylon 11, and the particle size of nylon 11 is between 5 μm, adding nano-scale (less than 100nm) silicon dioxide particles, the dosage is 0.001%, through a specific pretreatment process, using intermediate frequency Heat to 280-310°C, cover, keep the air pressure at 1.5 atmospheres in the rotating state, supply powder in the cyclone, adjust the current of the spray gun to 70μA, the voltage to 80KV, and carry out electrostatic spraying, then the spline sleeve of the drive shaft can be sprayed The outer wall is sprayed with a thickness of 100-150 μm, and the inner wall is coated with a uniform coating with a thickness of 250-400 μm, which has lubrication, dynamic balance and noise reduction. The coating on the outer wall does not need to be processed for machining, but the coating on the inner wall must be processed once to make the size within the allowable tolerance of the matching size of the matching...
Embodiment 2
[0010] The material of the coating is nylon 11, and the particle size is between 80 μm. After a specific pretreatment process, it is heated to 300 ° C by intermediate frequency. After covering, in the rotating state, the air pressure is kept at 1.5 atmospheres, and the powder is supplied by the cyclone. The current of the spray gun is 70μA, the voltage is 80KV, and the electrostatic spraying can be applied on the outer wall of the drive shaft spline sleeve with a thickness of 150μm, and on the inner wall with a thickness of 400μm. Floor. The coating on the outer wall does not need to be processed for machining, but the coating on the inner wall must be processed once to make the size within the allowable tolerance of the matching size of the matching friction pair.
[0011] The spline coating sleeve of the present invention is combined with other components into a truck transmission shaft assembly, and the torsion bench simulation test is carried out on a special truck transmi...
Embodiment 3
[0013] Take the cleaned part blank, fix it on the intermediate frequency heating equipment, adopt the intermediate frequency heating method, and control the temperature below 280 ° C, such as 270 ° C, cyclone powder supply, adjust the spray gun current to 70μA, voltage to 80KV, and carry out electrostatic spraying. After the spraying process was completed, the inspection found that the coating on the bottom of the spline teeth was discontinuous and there was spray leakage; the temperature was controlled at higher than 310°C, such as 320°C. After the spraying process was completed, the inspection found that the coating on the bottom of the spline teeth was Although the coating is continuous, the coating has discoloration and oxidation, which reduces the quality.
[0014] Use intermediate frequency heating to 280-310°C, for example, the actual measurement is 300°C. After the spraying process is completed, the inspection found that the coating on the bottom of the spline tooth is ...
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Abstract
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