Carbon-fiber-reinforced wear-resistant polyformaldehyde gear and preparation method thereof
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A technology of carbon fiber and polyoxymethylene, applied in gears, other household appliances, applications, etc., can solve the problems of complex processing technology, poor friction reduction and wear resistance, easy to generate sparks, etc., to achieve improved mechanical properties, small friction coefficient, and energy saving consumption effect
Active Publication Date: 2012-07-18
常州神鹰碳塑复合材料有限公司
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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
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[0020] A carbon fiber reinforced wear-resistant polyoxymethylene gear is made of the following raw materials in weight percentages,
[0022] First, the carbon fiber is subjected to composite surface treatment. The specific operation is as follows: the first step is to cut the carbon fiber filament into 4-8mm short cut, then put it into a box-type electric furnace, keep it warm at 300-600°C for 30-90 minutes, then stop heating, and cool down to room temperature with the furnace; In the second step, the oxidized carbon fiber chopped is coated with a solution of phenolic resin and coupling agent, and the weight ratio of phenolic resin and coupling agent is 1 to 4: 0.5 to 1; Chopped cuts are air dried and placed in a side-feed hopper until ready to use.
[0023] Put the chopped carbon fiber with composite surface trea...
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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...
Claims
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