CN111390654A - Treatment method for surface of carbon fiber resin matrix composite material - Google Patents
Treatment method for surface of carbon fiber resin matrix composite material Download PDFInfo
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- CN111390654A CN111390654A CN202010237533.7A CN202010237533A CN111390654A CN 111390654 A CN111390654 A CN 111390654A CN 202010237533 A CN202010237533 A CN 202010237533A CN 111390654 A CN111390654 A CN 111390654A
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- composite material
- carbon fiber
- sand paper
- fiber resin
- polishing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
Abstract
The invention discloses a method for treating the surface of a carbon fiber resin matrix composite material, which comprises the following steps: (1) coarse grinding and polishing the carbon fiber resin matrix composite material by using sand paper with the mesh number of 200-799; (2) polishing the surface of the carbon fiber resin matrix composite material for 1-n times by using sand paper with the mesh number of 800-6999 until the surface roughness Ra is less than or equal to 0.8 mu m, wherein the mesh number of the sand paper is increased progressively and the angle 1 of the polishing direction of the sand paper is changed to remove the trace of the last polishing; (3) and (3) finely grinding and polishing the surface of the carbon fiber resin matrix composite material for 1-m times by using sand paper with the mesh number of more than 7000, changing one sand paper every time, gradually increasing the mesh number of the sand paper, and changing the polishing direction angle 2 of the sand paper to remove the trace of the last polishing. The processing method disclosed by the invention can process the micro defects on the surface of the composite material under the condition of not damaging the carbon fiber, so that the resin content of the composite material is reduced, and the surface appearance and the reprocessing effect of the composite material are improved; the method is simple to operate, low in cost and short in time consumption.
Description
Technical Field
The invention belongs to the field of new materials, and particularly relates to a surface treatment method of a carbon fiber resin matrix composite material.
Background
The carbon fiber resin matrix composite material is widely applied to the fields of aerospace, wind power generation, automobile industry, sports equipment, construction and the like due to the advantages of high strength, high modulus, ageing resistance, good fatigue resistance, strong designability and the like, most of the products need to be smooth and attractive in surface, and therefore corresponding surface treatment is generated, wherein the common surface treatment process comprises repair coating, surface coating and grinding and the like.
The Chinese patent application with the publication number of CN107629238A discloses a method for treating a surface coating of a carbon fiber composite material, aiming at a method for treating the surface of the composite material. The method comprises the steps of pretreating the carbon fiber composite material, spraying transparent powder on the surface of the carbon fiber composite material, waiting for curing, polishing, cleaning, baking, spraying transparent paint on the surface of the carbon fiber reinforced resin matrix composite material cured by the transparent powder, and waiting for curing. The method adopts a protection system of acrylic acid transparent powder, acrylic acid transparent powder and acrylic acid transparent paint, and can effectively improve the surface effect of the carbon fiber reinforced resin matrix composite material.
The Chinese patent application with the publication number of CN107722326A discloses a method for treating a surface coating of a carbon fiber composite material, aiming at a method for treating the surface of the composite material. The processing method comprises the steps of firstly treating the surface of a base material by using plasma, coating a layer of resin film with good compatibility on the treated surface of the base material, doping 10-30% of uncured resin into a primer, spraying the primer on the surface of the base material, and finally spraying a layer of pure primer and finish paint with the thickness of 50-90 microns. The method can achieve the effect of beautiful surface of the carbon fiber composite material.
Chinese patent application publication No. CN107759816A discloses a treatment method on the surface of a carbon fiber reinforced epoxy resin or phenolic resin composite material. Firstly, preliminarily polishing by using 300-1000-mesh water sand paper; dipping 1-5% NaF and HCOOH mixed solution (NaF: HCOOH is 0.1-0.01) by absorbent cotton, wiping the polished surface of the base material for 5-10 min, finally coating a resin transition layer with the thickness of about 10-40 mu m on the surface without the release agent, naturally drying for 3-5 h, and then performing corresponding coating treatment.
The process method has a certain effect on the surface attractiveness of the carbon fiber composite material, but the treatment process is complicated in steps, high in cost, long in required time, high in technical requirement and capable of causing air pollution, if the carbon fiber composite material is not treated well during spraying, secondary treatment is needed, the carbon fiber is easily damaged, and double losses of time and cost are easily caused.
Disclosure of Invention
The invention provides a method for treating the surface of a carbon fiber resin matrix composite material, which enables the surface of the carbon fiber resin matrix composite material to be attractive under the condition of not damaging carbon fibers.
The technical scheme provided by the invention for solving the technical problems is as follows:
the invention provides a method for treating the surface of a carbon fiber resin matrix composite material, which comprises the following steps:
(1) coarse grinding and polishing the carbon fiber resin matrix composite material by using sand paper with the mesh number of 200-800;
(2) polishing the surface of the carbon fiber resin matrix composite material for 1-n times by using sand paper with the mesh number of 800-7000 until the surface roughness Ra is less than or equal to 0.8 mu m, wherein the mesh number of the sand paper is gradually increased and the angle 1 of the polishing direction of the sand paper is changed to remove the trace of the last polishing; wherein n is 2-10 degrees, and the angle 1 is 0-90 degrees;
(3) grinding and polishing the surface of the carbon fiber resin matrix composite material for 1-m times by using sand paper with the mesh number of more than 7000, changing one sand paper every time, gradually increasing the mesh number of the sand paper and changing the polishing direction angle 2 of the sand paper to remove the trace of the last polishing; wherein m is 2-8, and the angle 2 is 90-180 degrees.
The treatment method provided by the invention firstly carries out coarse grinding, only the grease layer on the surface of the composite material is planed, the carbon fiber is not damaged, and fine grinding are carried out after the coarse grinding is finished, so that the surface of the composite material is full of gloss and smooth.
The sand paper polishing direction is changed by rotating in the anticlockwise direction or rotating in the clockwise direction, and the rotating direction of the same processing method is kept unchanged.
In the step (1), the coarse grinding adopts a dry grinding method.
The number of times of coarse grinding is 1-z, one kind of sand paper is replaced every time, the mesh number of the sand paper is increased progressively, and the polishing direction angle 0 of the sand paper is changed to remove the trace of the last polishing; wherein z is 2-7, and the angle 0 is 0-90 degrees.
Preferably, the angle 0 is 30 to 60 degrees.
And (3) rotating the direction of the first fine grinding in the step (2) and the direction of the last rough grinding in the step (1) by 0-90 degrees anticlockwise.
The fine grinding in the step (2) uses a dry grinding method.
N is 2-7; more preferably 4 to 6.
The angle is changed to remove the trace of the previous polishing, and preferably, the angles 1 are respectively and independently 45-90 degrees.
And (3) rotating the direction of the first fine grinding in the step (3) and the direction of the last fine grinding in the step (2) by 90-180 degrees anticlockwise.
Preferably, the refining in step (3) uses a water milling method.
The water grinding method is to place the surface of the carbon fiber resin matrix composite material under water flow and polish the surface by sand paper. The abrasive paper generates dust during polishing, a workpiece is placed under water flow, the dust can be taken away by water, and the surface can be more delicate and smooth by a water grinding method.
M is 2-6; more preferably 3 to 6.
Further, the angle 2 is respectively and independently 90-180 degrees.
Preferably, the mesh number of the fine grinding sand paper is 10000-20000.
The surface roughness Ra of the carbon fiber resin matrix composite material obtained in the step (3) is less than or equal to 0.1 mu m.
The invention has the following beneficial effects:
1. the invention can treat the micro-defects on the surface of the composite material without damaging the carbon fibers, reduce the resin content of the composite material and improve the surface appearance and reprocessing (spraying and bonding) effects of the composite material.
2. The processing method has the advantages of simple operation, low cost consumption, short time consumption, no waiting processing time and less processing time consumption.
Drawings
FIG. 1: the polishing direction in example 1 is schematically shown in fig. 1.
FIG. 2: the polishing direction in example 1 is schematically shown in FIG. 2.
FIG. 3: the polishing direction in example 1 is schematically shown in FIG. 3.
The reference numerals shown in the figures are as follows: a1, a2 and a3 are polishing directions, and b is the surface of the carbon fiber resin matrix composite material.
Detailed Description
The present invention will now be described in detail by way of examples, which are given for the purpose of illustration only and are not intended to limit the scope of the invention. The compounds of the present invention may be prepared by a variety of synthetic methods well known to those skilled in the art, including the specific embodiments listed below, embodiments formed by combinations thereof with other methods of compound synthesis, and equivalents thereof known to those skilled in the art, and may also be commercially available. Preferred embodiments include, but are not limited to, examples of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made in the specific embodiments of the invention without departing from the spirit and scope of the invention.
Example 1
The surface of the carbon fiber resin matrix composite material is roughly ground 1 by using sand paper with 200 meshes, the grinding and polishing directions are shown in figure 2, and the grease layer on the surface of the carbon fiber resin matrix composite material is preliminarily planed.
The surface of the carbon fiber resin-based composite material was roughly ground 2 using sandpaper with a mesh number of 400, and the grinding and polishing was performed in a direction of 45 degrees counterclockwise as shown in fig. 3, to remove traces of the mesh number of 200.
The surface of the carbon fiber resin-based composite material was roughly ground 3 with 600 mesh sandpaper, and the grinding and polishing were performed in the direction shown in fig. 1, by rotating 45 degrees counterclockwise, to remove traces of 400 mesh.
The surface of the composite material was finely ground 1 using 800 mesh sandpaper, with the direction of the fine grinding 1 being as shown in fig. 2, rotated 90 degrees counterclockwise, removing the trace of 600 mesh.
The surface of the composite material was finely ground 2 using 1000 grit sandpaper, with the direction of the fine grinding 2 being rotated 45 degrees counterclockwise as shown in fig. 3, to remove the traces of 800 grit.
The surface of the composite material was finely ground 3 with 2000 mesh sandpaper, and the surface of the composite material was shaved by rotating the composite material 3 counterclockwise by 45 degrees as shown in fig. 1, and had a surface roughness Ra of 0.8 μm.
The surface of the composite material was finely ground 4 with 3000 mesh sandpaper, and the direction of the fine grinding 4 was rotated 90 degrees counterclockwise as shown in fig. 2, and 90 degrees different from the direction of the fine grinding 2, thereby removing the trace of 2000 mesh.
The surface of the composite material was finely ground 5 with 5000 mesh sandpaper, and the surface was shaved 3000 by rotating 90 degrees counterclockwise as shown in fig. 1, and the surface roughness Ra was 0.4 μm.
The surface of the composite was subjected to water flow and water-finish grinding 1 was carried out using 7000 mesh sandpaper, in the direction of grinding and polishing shown in fig. 3, rotating 135 degrees counterclockwise, removing 5000 mesh marks.
The surface of the composite material was subjected to water-refining 2 by using a sandpaper having a mesh number of 10000, and the surface was polished in the direction shown in fig. 2 by rotating 135 degrees counterclockwise, wherein the surface roughness Ra was 0.2 μm.
The surface was water-finished 3 with a piece of sandpaper having a mesh number of 15000 in a direction of 90 degrees counterclockwise as shown in fig. 1, with a surface roughness Ra of 0.1 μm.
The surface was water-finished 4 with an abrasive paper having a mesh number of 20000, and the direction of grinding and polishing was as shown in fig. 3, and rotated 135 degrees counterclockwise, where the surface roughness R was 0.025 μm.
Observation and inspection show that the surface of the carbon fiber resin matrix composite material is flat, and the surface is full of gloss, smooth, extremely high in fineness and mirror-like.
Claims (9)
1. A method for processing the surface of a carbon fiber resin matrix composite material is characterized by comprising the following steps:
(1) coarse grinding and polishing the carbon fiber resin matrix composite material by using sand paper with the mesh number of 200-799;
(2) polishing the surface of the carbon fiber resin matrix composite material for 1-n times by using sand paper with the mesh number of 800-6999 until the surface roughness Ra is less than or equal to 0.8 mu m, wherein the mesh number of the sand paper is increased progressively and the angle 1 of the polishing direction of the sand paper is changed to remove the trace of the last polishing; wherein n is 2-7, and the angle 1 is 0-90 degrees;
(3) grinding and polishing the surface of the carbon fiber resin matrix composite material for 1-m times by using sand paper with the mesh number of more than 7000, changing one sand paper every time, gradually increasing the mesh number of the sand paper and changing the polishing direction angle 2 of the sand paper to remove the trace of the last polishing;
wherein m is 2-8, and the angle 2 is 90-180 degrees.
2. The method for treating the surface of the carbon fiber resin-based composite material as claimed in claim 1, wherein the rough grinding is performed by a dry grinding method.
3. The method for treating the surface of the carbon fiber resin-based composite material as claimed in claim 1, wherein the fine grinding is performed by a dry grinding method.
4. The method for processing the surface of the carbon fiber resin-based composite material as claimed in claim 1, wherein the angle 1 in the step (2) is 45-90 degrees.
5. The method for treating the surface of a carbon fiber resin-based composite material according to claim 1, wherein the finish grinding is performed by a water milling method.
6. The method for processing the surface of the carbon fiber resin matrix composite material as claimed in claim 1, wherein the angles 2 are each independently 90 to 180 degrees.
7. The method for processing the surface of the carbon fiber resin matrix composite material according to claim 1, wherein the sand paper polishing direction is changed by rotating in a counterclockwise direction or rotating in a clockwise direction, and the rotating direction is kept unchanged in the same processing method.
8. The method for treating the surface of the carbon fiber resin-based composite material according to claim 1, wherein the mesh number of the fine-ground sand paper is 10000-20000.
9. The method for processing the surface of the carbon fiber resin matrix composite material as claimed in claim 1, wherein the surface roughness Ra of the carbon fiber resin matrix composite material obtained in the step (3) is less than or equal to 0.1 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010237533.7A CN111390654A (en) | 2020-03-30 | 2020-03-30 | Treatment method for surface of carbon fiber resin matrix composite material |
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| CN202010237533.7A CN111390654A (en) | 2020-03-30 | 2020-03-30 | Treatment method for surface of carbon fiber resin matrix composite material |
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| US20050130565A1 (en) * | 2003-01-22 | 2005-06-16 | Jorn Oellerich | Method for preparing surfaces of carbon fiber-reinforced plastics for further processing into supporting structural parts |
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| CN106425700A (en) * | 2016-10-16 | 2017-02-22 | 上海车功坊汽车服务有限公司 | Grinding and polishing process for repair of aluminum alloy hub |
| CN107520672A (en) * | 2017-08-02 | 2017-12-29 | 安吉圆磨机械科技有限公司 | A kind of polishing process of centrifugal automobile wheel |
| CN107629238A (en) * | 2017-08-25 | 2018-01-26 | 中信戴卡股份有限公司 | A kind of method for Treatment of Carbon composite material surface |
| CN107695799A (en) * | 2017-08-07 | 2018-02-16 | 安吉圆磨机械科技有限公司 | A kind of brake disc technique for grinding |
| CN108296886A (en) * | 2018-04-09 | 2018-07-20 | 东北大学 | A kind of polishing method of heavy-gauge steel iron casting test specimen |
| CN110193755A (en) * | 2019-05-14 | 2019-09-03 | 大连理工大学 | A kind of carbon fibre composite grinding processing method |
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2020
- 2020-03-30 CN CN202010237533.7A patent/CN111390654A/en active Pending
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| CN105842265A (en) * | 2016-05-30 | 2016-08-10 | 大连理工大学 | Surface treatment method of damage below machining face of carbon-fiber-reinforced composite material |
| CN106425700A (en) * | 2016-10-16 | 2017-02-22 | 上海车功坊汽车服务有限公司 | Grinding and polishing process for repair of aluminum alloy hub |
| CN107520672A (en) * | 2017-08-02 | 2017-12-29 | 安吉圆磨机械科技有限公司 | A kind of polishing process of centrifugal automobile wheel |
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| CN107629238A (en) * | 2017-08-25 | 2018-01-26 | 中信戴卡股份有限公司 | A kind of method for Treatment of Carbon composite material surface |
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Application publication date: 20200710 |