A kind of weaving method of carbon fiber prefabricated body of automobile brake disc

Abstract

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. The method comprises the following steps: (1) preparing carbon fiber plain weave; (2) preparing carbon fiber mesh; (3) sewing the carbon fiber plain weave of step (1) and the carbon fiber mesh of step (2) together to form a Layer plain weave-mesh tire cloth; (4) the plain weave-mesh tire cloth obtained in step (3) is wound multiple times along the circumferential direction of the graphite sleeve, and needle punched once per circle around the circle until reaching the size requirements of the carbon fiber prefabricated body , forming a carbon fiber preform; the weight percentage of carbon fiber plain weave in the carbon fiber preform is ≥ 67%, and the weight percentage of carbon fiber mesh tire is ≤ 33%. The preparation method of the invention is safer, has less fiber waste, can ensure higher thermal conductivity in the thickness direction of the product, more uniform material phase inside the material, and smoother and more beautiful friction surface.

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 preform and its weaving process method", mainly using polyacrylonitrile filaments and a layer of polyacrylonitrile pre-oxidized filaments at 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. It has the following disadvantages: After cutting the fibers, there is still a certain degree of waste; each layer is spliced ​​by four cut semicircles, and the strength of the formed brake disc preform will decrease significantly; there is polyacrylonitrile 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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