CN-121977905-A - Carbon fiber sample preparation tool and sample preparation method

Abstract

The application provides a carbon fiber sample preparation tool and a sample preparation method, and relates to the technical field of carbon fiber production. This carbon fiber system appearance frock includes the fixed bolster and can dismantle the frock main part of being connected with the fixed bolster, has set gradually a plurality of cavitys in the frock main part, is provided with tensiometer and moving part in every cavity, and the moving part is connected with the tensiometer, and the moving part slides and set up in the cavity, and the bottom surface of frock main part is the arcwall face, and the arcwall face is used for jointly winding up the carbon fiber tow with the moving part, can alleviate the stress to the fibre production, promotes the accuracy of test result.

Inventors

• LIN KANG
• YANG XIANGLIN
• ZHANG YUAN
• CHU CHUANMIN
• XU JINKE

Assignees

• 中复神鹰碳纤维连云港有限公司

Dates

Publication Date

20260505

Application Date

20260211

Claims (10)

1. 1. The utility model provides a carbon fiber system appearance frock, its characterized in that, including the fixed bolster and with the frock main part that the fixed bolster can dismantle the connection has set gradually a plurality of cavitys in the frock main part, every be provided with tensiometer and moving part in the cavity, the moving part with the tensiometer is connected, just the moving part slide set up in the cavity, the bottom surface of frock main part is the arcwall face, the arcwall face with the moving part is used for jointly winding up the carbon fiber silk bundle.
2. 2. The carbon fiber sample preparation tool according to claim 1, wherein the radius of curvature R of the arc-shaped surface is not less than 15mm.
3. 3. The carbon fiber sampling tool according to claim 1, wherein the surface finish Ra of the arcuate surface is less than or equal to 0.2 μm.
4. 4. The carbon fiber sample preparation tool according to claim 1, wherein a sliding groove is formed in the inner wall of each cavity, and the movable piece is in sliding fit with the sliding groove.
5. 5. The carbon fiber sample preparation tool according to claim 1, wherein the movable piece is rod-shaped, and a fixing notch is formed in the middle of the movable piece towards one side of the tensiometer.
6. 6. The carbon fiber sample preparation tool according to claim 1, wherein a first fixing column is arranged on the tool main body, a fixing groove is arranged on the fixing support, and the first fixing column is in clamping fit with the fixing groove.
7. 7. The carbon fiber sample preparation tooling according to claim 1, wherein a plurality of second fixing columns are arranged at intervals at the top of the tooling body, and each second fixing column is used for fixing a corresponding carbon fiber tow.
8. 8. A sample preparation method, characterized in that the method is realized by using the carbon fiber sample preparation tool of any one of claims 1-7; The sample preparation method comprises the following steps: arranging a plurality of carbon fiber tows in a plurality of cavities respectively, and fixing the carbon fiber tows with the arc-shaped surface by utilizing the movable piece so that the tension of each carbon fiber tow is in a preset range; Removing the tool main body from the fixed support, and immersing the tool main body part into resin; reassembling the tool main body on the fixed bracket, and putting the whole carbon fiber sample preparation tool into a curing furnace; Each of the carbon fiber tows was removed and standard tensile testing was performed.
9. 9. The method according to claim 8, wherein in the step of arranging the plurality of carbon fiber tows in the plurality of cavities, respectively, and fixing the plurality of carbon fiber tows with the arc-shaped surface by using the movable member, the tension of each carbon fiber tow is in a preset range, and the preset range is 0.1-0.5 n.
10. 10. The method according to claim 9, wherein the predetermined range is 0.2 to 0.3n.

Description

Carbon fiber sample preparation tool and sample preparation method Technical Field The application relates to the technical field of carbon fiber production, in particular to a carbon fiber sample preparation tool and a sample preparation method. Background The polyacrylonitrile-based ultrahigh-modulus carbon fiber (such as M50J, M grade J, M J) is a core key material for manufacturing tip equipment such as spacecraft main structures, high-performance satellite platforms, space manipulators and the like, the elastic modulus of the polyacrylonitrile-based ultrahigh-modulus carbon fiber is usually not lower than 475GPa, the elongation at break is extremely low (less than or equal to 0.9 percent), the polyacrylonitrile-based ultrahigh-modulus carbon fiber presents extremely high brittleness, the extremely high brittleness is caused by a highly ordered graphite crystal structure, and meanwhile, great challenges are brought to accurate evaluation of mechanical properties of the polyacrylonitrile-based ultrahigh-modulus carbon fiber. At present, the tensile property of the carbon fiber is commonly tested by adopting a multifilament method according to domestic and foreign standards (such as GB/T3362 and ASTM D4018). However, the existing general sample preparation tool has the following defects when processing the ultrahigh modulus and ultrahigh brittleness fibers, the sample preparation tool can generate obvious stress concentration on the fibers when the fibers are wound, partial monofilaments are directly possibly broken, initial defects before testing are formed, the final test result is seriously deviated from the actual performance of the fibers, the data discreteness is large, and accurate basis cannot be provided for material research and development and quality judgment. Disclosure of Invention The application aims to provide a carbon fiber sample preparation tool, which can relieve stress on fibers and improve the accuracy of test results. The application further aims to provide a sample preparation method which can relieve stress on fibers and improve accuracy of test results. Embodiments of the application may be implemented as follows: In a first aspect, an embodiment of the present application provides a carbon fiber sample preparation tool, which includes a fixing support and a tool main body detachably connected with the fixing support, wherein a plurality of cavities are sequentially provided on the tool main body, a tensiometer and a movable part are provided in each cavity, the movable part is connected with the tensiometer, the movable part is slidably disposed in the cavity, the bottom surface of the tool main body is an arc surface, and the arc surface and the movable part are used for winding carbon fiber tows together. Optionally, the curvature radius R of the arc-shaped surface is more than or equal to 15mm. Optionally, the surface finish Ra of the arc-shaped surface is less than or equal to 0.2 mu m. Optionally, a sliding groove is formed in the inner wall of each cavity, and the movable piece is in sliding fit with the sliding groove. Optionally, the movable part is in a rod shape, and a fixing notch is arranged on one side of the middle part of the movable part, which faces the tensiometer. Optionally, be provided with first fixed column on the frock main part, be equipped with the fixed slot on the fixed bolster, first fixed column with fixed slot joint cooperation. Optionally, a plurality of second fixed columns are arranged at intervals at the top of the tool main body, and each second fixed column is used for fixing a corresponding carbon fiber tow. In a second aspect, the application also provides a sample preparation method, which is realized by using the carbon fiber sample preparation tool; The sample preparation method comprises the following steps: arranging a plurality of carbon fiber tows in a plurality of cavities respectively, and fixing the carbon fiber tows with the arc-shaped surface by utilizing the movable piece so that the tension of each carbon fiber tow is in a preset range; Removing the tool main body from the fixed support, and immersing the tool main body part into resin; reassembling the tool main body on the fixed bracket, and putting the whole carbon fiber sample preparation tool into a curing furnace; Each of the carbon fiber tows was removed and standard tensile testing was performed. Optionally, the method further includes the step of setting a plurality of carbon fiber tows in a plurality of cavities, and fixing the carbon fiber tows with the arc surface by using the movable parts, so that the tension of each carbon fiber tow is in a preset range, wherein the preset range is 0.1-0.5 n. Optionally, the preset range is 0.2-0.3 n. The carbon fiber sample preparation tool and the sample preparation method have the beneficial effects that the movable piece is connected with the tensiometer, and tension applied to each carbon fiber tow can be monitored and fed