Carbon-fiber-reinforced wear-resistant polyformaldehyde gear and preparation method thereof

Abstract

The invention relates to a carbon-fiber-reinforced polyformaldehyde gear which is prepared from polyformaldehyde resin, chopped carbon fiber, molybdenum disulfide, calcium stearate, coupling agent and phenolic resin. The invention also relates to a preparation method of the carbon-fiber-reinforced polyformaldehyde gear, which comprises the following steps: carrying out composite surface treatmenton the carbon fiber; and putting the raw materials into a high-speed mixer according to the percentage in the formula, sufficiently mixing, granulating, and carrying out injection molding in an injection molding machine. The composite surface treatment, which is carried out on the chopped carbon fiber, greatly improves the wettability of the carbon fiber surface, and maximally enhances the interfacial adhesiveness between the carbon fiber and the polyformaldehyde matrix, thereby greatly enhancing the mechanical properties of the composite material. The gear prepared from the carbon-fiber-reinforced wear-resistant polyformaldehyde has the advantages of low specific gravity, low noise, favorable wear resistance, favorable self-lubrication effect, chemical corrosion resistance, high specificstrength, large specific modulus, small thermal expansion coefficient, static resistance and the like, and does not produce sparks, thereby being capable of replacing the original steel part. In addition, the invention reduces the labor intensity of workers, and lowers the energy consumption.

Description

technical field [0001] The invention relates to a mechanical transmission technology, in particular to a carbon fiber reinforced wear-resistant polyoxymethylene gear and a preparation method thereof. Background technique [0002] Among domestic and foreign mining machinery and equipment, there is a small drilling machine called a hand-held pneumatic drilling machine, and the air motor is a key component of the hand-held pneumatic drilling machine, and its function is to transmit torque to the drill pipe to realize the rotation of the drilling tool. The motor is composed of a shell, a cover plate, a gear, a shaft, etc., and the gear is its core part. The wear resistance of the gear directly affects the performance and life of the air motor. The gears running in the air motor not only need to withstand large friction and impact force, but also need good dimensional stability, and also be affected by the working environment, such as dust, sand, acid, alkali, salt and other corr...

AI Technical Summary

Problems solved by technology

At present, most of the gears used in hand-held pneumatic drilling rigs are steel parts processed and then high-frequency nitriding treatment to solve the problem of wear resistance. Poor wear resistance, easy to generate sparks during high-speed operation, labor-intensive and energy-consuming when workers operate