Weaving method of carbon fiber preform of automobile brake disc

Abstract

The invention relates to a weaving method of a carbon fiber preform of an automobile brake disc, and belongs to the technical field of carbon fiber composite material reinforcement weaving. The methodincludes the following steps: (1) preparing a carbon fiber plain cloth; (2) preparing a carbon fiber net tire; (3) sewing the carbon fiber plain cloth of step (1) and the carbon fiber net tire of step (2) together to form a plain-mesh tire cloth; and (4) winding the plain-mesh tire cloth obtained in the step (3) for a plurality of circles along the circumferential direction of a graphite sleeve,and needling once in each winding circle until the size requirement of the carbon fiber preform is met to form the carbon fiber preform, wherein the weight percentage of the carbon fiber plain cloth in the carbon fiber preform is more than or equal to 67%, and the weight percentage of the carbon fiber net tire is less than or equal to 33%. The preparation method is safer, the fiber waste quantityis less, the thermal conductivity in the thickness direction of the product can be ensured to be higher, the internal phase of the material is more uniform, and the friction surface is smoother and more beautiful.

Description

technical field [0001] The invention relates to a method for weaving a carbon fiber prefabricated body of an automobile brake disc, and belongs to the technical field of weaving carbon fiber composite material reinforcements. Background technique [0002] Automotive carbon / ceramic brake discs are the latest automotive brake materials on the market. Carbon / ceramic discs belong to carbon fiber reinforced ceramic matrix composite materials. The composite material consists of three parts: matrix, interface and reinforcement. The fiber prefabricated body belongs to the reinforcement part of the composite material, which has a decisive impact on the performance of the material. The arrangement and weaving of carbon fibers will have an impact on the mechanical properties, thermophysical properties and friction and wear properties of the material. Different weaving methods will also have an impact on the cost and safety performance of the product. [0003] With the continuous popu...

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Problems solved by technology

[0004] Chinese patent application CN 102152555 A discloses a "manufacturing carbon / carbon composite brake disc annular prefabricated body and its weaving process method", mainly using polypropylene clear filament and a layer of polypropylene clear pre-oxidized yarn under normal temperature and pressure The upper and lower layers of the net tire are overlapped and laid flat to form a "1+1 structure". The long roll-shaped "felt body" is fixed by vertical needle punching with a needle loom, and then cut to form four semicircles. However, it has the following disadvantages: After the fiber is cut, there is still a certain degree of waste; each layer is spliced ​​by four cut semicircles, and the strength of the formed brake disc prefabricated body will be significantly reduced; there is polypropylene on the brake disc surface. There are obvious differences in the phase between the long fiber layer and the mesh layer, which affects the friction performance; the fiber content in the vertical direction of the disk surface is small and short fibers, the thermal conductivity is low, and the temperature of the disk surface decreases slowly

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