CN215163568U

CN215163568U - Carbon brake disc preform

Info

Publication number: CN215163568U
Application number: CN202121468762.6U
Authority: CN
Inventors: 甘晶晶; 龚兵兵; 王云海
Original assignee: Zhejiang Xinghui New Material Technology Co ltd
Current assignee: Zhejiang Xinghui New Material Technology Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-14
Anticipated expiration: 2031-06-30

Abstract

The utility model provides a carbon brake disc preform, the preform includes sandwich layer subassembly and surface layer subassembly, the surface layer subassembly is equipped with a pair ofly, and joint in sandwich layer subassembly both sides respectively, wherein, the density of sandwich layer subassembly is greater than the density of surface layer subassembly, the thickness of sandwich layer subassembly is less than the thickness of surface layer subassembly, compound through the acupuncture between sandwich layer subassembly and the surface layer subassembly; this sandwich layer subassembly of carbon brake disc preform adopts long fiber layer and short fiber layer acupuncture complex to form, certain mechanical strength and antitorque commentaries on classics ability have, and sandwich layer long fiber layer density is high, middle deposition rate will be higher than both sides, it is more compact easily, and top layer subassembly adopts short fiber layer acupuncture complex to form, its horizontal direction fibre damage is little, the dispersion is effectual, basically, the mutual overlap joint of monofilament fiber, form evenly distributed's hole, gas diffusion rate is greater than deposition rate, can effectively alleviate the phenomenon of carbon brake disc surface crusting in the deposition process, be favorable to densifying, make overall structure more even.

Description

Carbon brake disc preform

Technical Field

The utility model relates to a carbon fiber product especially relates to a carbon brake disc preform.

Background

The carbon brake disc is made of carbon fiber composite materials, and is excellent in wear resistance and long in service life. Commonly used carbon brake disc preforms generally adopt the following structure:

1. the carbon cloth laminated prefabricated body has the problems of high cost, poor quality consistency, easy occurrence of stripping and shedding phenomena in the actual use process, large abrasion loss, short service life and the like;

2. short fiber mould pressing prefabricated body, the fiber in the prefabricated body is in discontinuous distribution and random orientation, the biggest shortcoming is that the mechanical property is lower;

3. the forming process is that carbon cloth-net tire is basically a unit layer and is paved to a certain thickness for layer-by-layer needling compounding, compared with other two brake disc preform structures, the isotropy of the carbon cloth-net tire is improved, the Z-direction fiber improves the heat conduction in the vertical direction and the shearing strength between layers, but a bottleneck effect is easy to generate in the deposition process, the later densification is slow, the defect needs to be eliminated through repeated heat treatment and processing, the preparation period is long, the cost is high, and the friction performance and the wear resistance of the prepared carbon brake disc are unstable.

The thickness of the carbon/carbon brake disc preform is 30-50 mm, a carbon/carbon composite material with a needle felt structure is usually used, the surface is easy to crust in the deposition process, and the crust must be removed through multiple times of heat treatment and mechanical processing until the final densification is achieved. Meanwhile, the open porosity of the carbon/carbon composite material with the needled felt structure is characterized by low distribution at two sides and high distribution at the middle, and the bottleneck effect is easy to generate.

Therefore, there is a need for a structural optimization of such carbon brake disc preforms to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a carbon brake disc preform solves carbon brake disc material preparation cycle length, with high costs and the unstable problem of frictional property.

The utility model discloses a solve the technical scheme that its technical problem adopted and be:

the utility model provides a carbon brake disc preform, includes core layer subassembly and surface layer subassembly, and the surface layer subassembly is equipped with a pair ofly to joint respectively in core layer subassembly both sides, wherein:

the density of the core layer component is greater than that of the surface layer component;

the thickness of the core layer component is smaller than that of the surface layer component;

and the core layer assembly and the surface layer assembly are compounded through needling.

Further, the core layer assembly is formed by needling and compounding a long fiber layer and a short fiber layer;

the surface layer component is formed by needling and compounding short fiber layers.

Furthermore, the long fiber layer is made of long fiber warp and weft cloth or long fiber non-fiber cloth;

the short fiber layer is made of short fiber net tires.

Further, the density of the core layer assembly is 0.55-0.65 g/cm³The density of the surface layer component is 0.2-0.3 g/cm³；

The thickness of the core layer assembly is 8-10 mm, and the thickness of the surface layer assembly is 12-14 mm;

6 to 10 percent of Z-direction fibers vertically permeate in the needling composite process.

The utility model has the advantages that:

the core layer component of the carbon brake disc preform is formed by needling and compounding a long fiber layer and a short fiber layer, has certain mechanical strength and torsion resistance, and the long fiber layer of the core layer has high density, large fiber volume fraction and large effective specific surface area of deposition, so that the middle deposition rate is higher than that of the two sides, the middle deposition rate is more compact and the two sides are gradually diffused, the surface layer component is formed by adopting short fiber layer needling composite, the fiber damage in the horizontal direction is small, the dispersion effect is good, basically, monofilament fibers are mutually overlapped to form uniformly distributed pores, the diameter of the internal pores is larger, gas can more easily enter the pores, the gas diffusion rate is higher than the deposition rate, the carbon brake disc can effectively relieve the incrustation phenomenon on the surface of the carbon brake disc in the deposition process, is beneficial to densification, enables the overall structure to be more uniform, is beneficial to improving the performance of the carbon brake disc, improves the production efficiency and reduces the production cost.

Drawings

Fig. 1 is a schematic structural diagram of a carbon brake disc preform provided by the present invention;

FIG. 2 is one of the schematic structural views of the core assembly;

fig. 3 is a second schematic structural view of the core assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the carbon brake disc preform provided by the present invention comprises a core layer assembly 100 and a surface layer assembly 200, wherein the surface layer assembly is provided with a pair of core layers and respectively joined to two sides of the core layer assembly, wherein the density of the core layer assembly is greater than that of the surface layer assembly, the thickness of the core layer assembly is less than that of the surface layer assembly, and the core layer assembly and the surface layer assembly are combined by needling; the density of the core layer component is 0.55-0.65 g/cm³The density of the surface layer component is 0.2-0.3 g/cm³(ii) a The thickness of the core layer assembly is 8-10 mm, and the thickness of the surface layer assembly is 12-14 mm; 6 to 10 percent of Z-direction fibers vertically permeate in the needling composite process.

Specifically, the core layer assembly is formed by compounding a long fiber layer and a short fiber layer through needle punching, and the surface layer assembly is formed by compounding a short fiber layer through needle punching. The long fiber layer is made of long fiber warp and weft cloth 110 or long fiber non-dimensional cloth 120, the short fiber layer is made of short fiber net 210, as shown in fig. 2, the long fiber layer is made of long fiber warp and weft cloth, as shown in fig. 3, the long fiber layer is made of long fiber non-dimensional cloth.

The preparation method of the brake disc preform comprises the following steps:

preparing a plurality of long fiber layers and short fiber layers, wherein the long fiber layers and the short fiber layers are laminated at intervals and compounded through needling to form a core layer assembly; wherein the long fiber layer has a density of 200-250 g/m²The long fiber warp and weft cloth or the long fiber non-woven cloth is manufactured, the warp directions of the adjacent long fiber non-woven cloth are mutually vertical, and the needling density is 30-35 spines/cm in the needling composite process²The needling depth is 12-15 mm;

laying a short fiber layer on one side of the core layer component, and performing needling compounding to form a first surface layer component, laying a short fiber layer on the other side of the core layer component, and performing needling compounding to form a second surface layer component; wherein the density of the short fiber layer is 50-100 g/m²The short fiber net tire is manufactured, when the short fiber layer is laid, 5-8 layers are laid each time, and in the needling composite process, the needling density is 20-30 needling/cm²The needling depth is 8-11 mm.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the designated devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Claims

1. The utility model provides a carbon brake disc preform, includes core layer subassembly and surface layer subassembly, and the surface layer subassembly is equipped with a pair ofly to joint respectively in core layer subassembly both sides, its characterized in that:

2. A carbon brake disc preform according to claim 1, wherein:

the core layer assembly is formed by compounding a long fiber layer and a short fiber layer in a needling manner;

3. A carbon brake disc preform according to claim 2, wherein:

the long fiber layer is made of long fiber warp and weft cloth or long fiber non-fiber cloth;

the short fiber layer is made of short fiber net tires.

4. A carbon brake disc preform according to claim 1, wherein:

the density of the core layer component is 0.55-0.65 g/cm³The density of the surface layer component is 0.2-0.3 g/cm³；