CN113895052B - Method for preparing carbon fiber brake handle - Google Patents
Method for preparing carbon fiber brake handle Download PDFInfo
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- CN113895052B CN113895052B CN202111027664.3A CN202111027664A CN113895052B CN 113895052 B CN113895052 B CN 113895052B CN 202111027664 A CN202111027664 A CN 202111027664A CN 113895052 B CN113895052 B CN 113895052B
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- carbon fiber
- brake handle
- brake
- fiber prepreg
- die
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 145
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 145
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000004744 fabric Substances 0.000 claims abstract description 48
- 238000005498 polishing Methods 0.000 claims abstract description 24
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 238000007493 shaping process Methods 0.000 claims abstract description 20
- 238000005488 sandblasting Methods 0.000 claims abstract description 17
- 238000010030 laminating Methods 0.000 claims abstract description 10
- 239000003973 paint Substances 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 4
- 229920006324 polyoxymethylene Polymers 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 32
- 229920006351 engineering plastic Polymers 0.000 claims description 28
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 16
- 229920002530 polyetherether ketone Polymers 0.000 claims description 16
- 229920001643 poly(ether ketone) Polymers 0.000 claims description 15
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 14
- -1 polyoxymethylene Polymers 0.000 claims description 14
- 229920008285 Poly(ether ketone) PEK Polymers 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000010146 3D printing Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 7
- 238000007639 printing Methods 0.000 claims description 6
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims 4
- 238000005422 blasting Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 239000004593 Epoxy Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
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- 125000003118 aryl group Chemical group 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
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- BWQOPMJTQPWHOZ-UHFFFAOYSA-N (2,3-difluorophenyl)-phenylmethanone Chemical compound FC1=CC=CC(C(=O)C=2C=CC=CC=2)=C1F BWQOPMJTQPWHOZ-UHFFFAOYSA-N 0.000 description 1
- RXNYJUSEXLAVNQ-UHFFFAOYSA-N 4,4'-Dihydroxybenzophenone Chemical compound C1=CC(O)=CC=C1C(=O)C1=CC=C(O)C=C1 RXNYJUSEXLAVNQ-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
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- 229920006260 polyaryletherketone Polymers 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/002—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/84—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2059/00—Use of polyacetals, e.g. POM, i.e. polyoxymethylene or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2071/00—Use of polyethers, e.g. PEEK, i.e. polyether-etherketone or PEK, i.e. polyetherketone or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3091—Bicycles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a method for preparing a carbon fiber brake handle, which comprises the following steps: cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth based on the brake handle laminating book; attaching carbon fiber prepreg cloth and 3k twill carbon fiber prepreg cloth according to a brake handle attaching book, and attaching the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-mold according to an attaching layer combination mode; assembling the brake handle preforming die based on a cutting die, and vacuumizing and shaping the brake handle preforming die; placing the brake handle preforming die and the brake limiting device which are subjected to evacuation shaping into a die for hot press shaping; machining the hot-pressed product according to the specification and the size of the brake handle to obtain the carbon fiber brake handle with the mounting hole; and cleaning, spraying paint, polishing and polishing the carbon fiber brake handle after the sand blasting and polishing treatment to obtain a molded product. The carbon fiber brake handle prepared based on the method has the advantages of high strength, light weight and high wear resistance.
Description
Technical Field
The invention relates to the technical field of carbon fibers, in particular to a method for preparing a carbon fiber brake handle.
Background
The brake handle is a braking device of electric vehicles, motorcycles and bicycles, and is thus an indispensable component in the structure of the vehicle.
The prior brake handle assembly structure on the vehicle is only fastened on the periphery of the handlebar through the mounting ring and the bolt in a coating manner, and the brake handle is only singly fixed relative to the circumference of the handlebar by friction force. When the emergency is met, a driver suddenly breaks a brake, the brake handle is easy to rotate due to the excessive acting force, the brake handle is further released, the brake is not in place, and the vehicle cannot stop in time to cause a driving accident. The existing brake handles are all made of metal, but the rigidity, the portability and the wear resistance are poor due to the metal preparation.
Disclosure of Invention
Aiming at the defects of the existing brake handle, the invention provides a method for preparing the carbon fiber brake handle, and the carbon fiber brake handle prepared based on the method has the advantages of high strength, light weight and high wear resistance.
The invention provides a method for preparing a carbon fiber brake handle, which comprises the following steps:
cutting the carbon fiber prepreg and the 3k diagonal carbon fiber prepreg cloth based on a brake handle laminating book to obtain the required carbon fiber prepreg cloth and the 3k diagonal carbon fiber prepreg cloth;
attaching carbon fiber prepreg cloth and 3k twill carbon fiber prepreg cloth according to a brake handle attaching book, and attaching the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-mold according to an attaching layer combination mode;
assembling the brake handle preforming die based on a cutting die, and vacuumizing and shaping the brake handle preforming die;
placing the brake handle preforming die and the brake limiting device which are subjected to evacuation shaping into a die for hot press shaping;
machining the hot-pressed product according to the specification and the size of the brake handle to obtain the carbon fiber brake handle with the mounting hole;
performing sand blasting and polishing treatment on the carbon fiber brake handle;
and cleaning, polishing, painting, grinding and polishing the carbon fiber brake handle after the sand blasting and polishing treatment to obtain a molded product.
The carbon fiber prepreg includes: 150g of unidirectional carbon fiber prepreg and 300g of unidirectional carbon fiber prepreg.
The 3k twill carbon fiber prepreg cloth is attached to the inner layer and the outer layer.
Cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth based on the brake handle laminating book comprises the following steps:
inputting a 2D drawing related to a laminated book based on a brake handle into an automatic yarn cutting machine;
and cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth according to a 2D drawing by an automatic yarn cutting machine.
The brake limiting device includes: the first brake limiting piece and the second brake limiting piece, the first brake limiting piece adopts one of polyoxymethylene POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials to be made, and the second brake limiting piece adopts one of polyoxymethylene POM engineering plastics, polyether ketone PEK materials, polyether ketone PEEK materials and carbon fiber materials to be made.
The method further comprises the steps of:
selecting one of polyoxymethylene POM engineering plastic, polyether ketone PEK material and polyether ketone PEEK material, and printing and forming a first brake limiting piece by adopting a 3D printing technology;
selecting one of polyoxymethylene POM engineering plastic, polyether ketone PEK material and polyether ketone PEEK material, and printing and forming a second brake limiting piece by adopting a 3D printing technology;
and carrying out sand blasting and polishing treatment on the first brake limiting piece and the second brake limiting piece.
The range of the temperature value of the hot press molding is as follows: 140 ℃ to 150 ℃; the time value range of the hot press molding is as follows: 35 minutes to 40 minutes.
And the brake handle preforming die for evacuating and shaping and the brake limiting device are put into a die for hot press molding, and then the brake handle preforming die further comprises:
carrying out cold treatment on the die, wherein the cold treatment time ranges from 7 minutes to 10 minutes;
and opening the die and taking out the molded product.
And the brake handle preforming die for evacuating and shaping and the brake limiting device are put into a die for hot press molding, and then the brake handle preforming die further comprises:
and (5) carrying out deburring treatment on the hot-pressed product.
The sand blasting and polishing treatment for the carbon fiber brake handle comprises the following steps:
and uniformly spraying carbon fiber on the surface of the brake handle by adopting a sand blasting machine, and polishing the carbon fiber handle by adopting a polisher or a grinder.
According to the method provided by the embodiment of the invention, the brake limiting device can be independently printed and formed by adopting a POM engineering plastic 3D printing technology, the brake handle main body adopts unidirectional carbon fiber prepreg and 3K carbon fiber prepreg cloth to be laminated in a multi-layer and multi-angle mode, the brake limiting device and the brake handle prefabricated body are correspondingly placed in a brake handle forming die synchronously, and the brake limiting device and the brake handle prefabricated body are formed at high temperature and high pressure and are connected with the carbon fiber epoxy composite material and the POM engineering plastic through epoxy resin in the carbon fiber prepreg. The carbon fiber brake handle prepared by the method has high strength, reduces the quality of the original carbon fiber brake handle, improves the performance of the whole brake handle, and ensures that the brake handle has better wear resistance.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of making a carbon fiber brake handle in an embodiment of the present invention;
fig. 2 is a schematic structural view of a carbon fiber brake handle according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 shows a flowchart of a method for manufacturing a carbon fiber brake handle according to an embodiment of the present invention, which specifically includes the following steps:
the invention provides a method for preparing a carbon fiber brake handle, which comprises the following steps:
s11, cutting the carbon fiber prepreg and the 3k diagonal carbon fiber prepreg cloth based on a brake handle laminating book to obtain the required carbon fiber prepreg cloth and the 3k diagonal carbon fiber prepreg cloth;
specifically, this paste layer book based on brake handle tailors carbon fiber prepreg and 3k twill carbon fiber prepreg cloth and includes: inputting a 2D drawing related to a laminated book based on a brake handle into an automatic yarn cutting machine; and cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth according to a 2D drawing by an automatic yarn cutting machine, so as to cut out a required material sheet.
The brake handle laminated book is equivalent to a manufacturing process manual, and a plurality of carbon fiber prepreg cloth required to be adhered, the shape, the size and the like cut by the plurality of carbon fiber cloth are designed according to the specification of a formed product.
Specifically, the carbon fiber prepreg includes: 150g of unidirectional carbon fiber prepreg and 300g of unidirectional carbon fiber prepreg. The 3k twill carbon fiber prepreg may be 200g 3k twill carbon fiber prepreg.
S12, attaching carbon fiber prepreg cloth and 3k diagonal carbon fiber prepreg cloth according to a brake handle lamination book, and attaching the carbon fiber prepreg cloth and the 3k diagonal carbon fiber prepreg cloth into a brake handle pre-mold according to a lamination combination mode;
the carbon fiber prepreg cloth relates to 2 to 5 pieces of 150g unidirectional carbon fiber prepreg cloth, 2 to 5 pieces of 300g unidirectional carbon fiber prepreg cloth and 2 pieces of 3k twill carbon fiber prepreg cloth, wherein the 3k twill carbon fiber prepreg cloth is attached to the inner layer and the outer layer, the 150g unidirectional carbon fiber prepreg cloth and the 300g unidirectional carbon fiber prepreg cloth are cross-attached to one another according to an attaching composition mode, and finally the brake handle pre-mold is formed.
It should be noted that, in the process of laminating, can brush one deck cyanate resin between the cloth layer, here cyanate resin can make the laminating in-process reduce the bubble, and convenient evacuation is finalized the design, because adopt cyanate resin can be when hot briquetting for the material between cyanate resin and the carbon fiber cloth fuses, fuses with higher speed to the layered structure between the whole carbon fiber brake handle, reduces the shaping time, improves shaping efficiency.
S13, assembling the brake handle preforming die based on a cutting die, and vacuumizing and shaping the brake handle preforming die;
the utility model has the advantages of assemble brake handle preforming mould through the cutting die for the cloth pressfitting between the fashioned brake handle preforming mould of laminating is compacter, avoids having bigger gap, also makes things convenient for the better adaptation of brake handle preforming mould in hot briquetting's mould, and the air between the laminating reduces, reduces the bubble shaping in the product in the hot briquetting process, strengthens rigidity and hardness of product, reduces the defective rate of product to the brake handle preforming mould evacuation design.
S14, placing the brake handle preforming die and the brake limiting device which are subjected to evacuation shaping into a die for hot press shaping;
the brake limiting device here includes: the first brake limiting piece and the second brake limiting piece, the first brake limiting piece adopts one of polyoxymethylene POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials to be made, and the second brake limiting piece adopts one of polyoxymethylene POM engineering plastics, polyether ketone PEK materials, polyether ketone PEEK materials and carbon fiber materials to be made.
POM (Polyformaldehyde) engineering plastics are polyoxymethylene engineering plastics: polyoxymethylene is a linear polymer having no side chains, high density and high crystallinity. According to the different chemical structures in the molecular chain, the method can be divided into homo-formaldehyde and co-formaldehyde. The important differences are: the homo-formaldehyde has high density, crystallinity and melting point, but has poor thermal stability, narrow processing temperature range (about 10 ℃), and slightly lower acid-base stability; the copolyformaldehyde has low density, crystallinity, melting point and strength, but has good thermal stability, difficult decomposition, wide processing temperature range (about 50 ℃), and good acid-base stability. Is engineering plastic with excellent comprehensive performance. Has good physical, mechanical and chemical properties, in particular excellent friction resistance. Commonly known as racing steel or steel-robbing steel, is the third largest engineering plastic. Is suitable for manufacturing antifriction and wear-resistant parts, transmission parts, parts of chemical industry, instruments and the like.
The polyether-ether-ketone PEEK is a special engineering plastic with excellent performances of high temperature resistance, self lubrication, easy processing, high mechanical strength and the like, and can be manufactured and processed into various mechanical parts. The PEEK (polyether ether ketone) plastic raw material is an aromatic crystallization type thermoplastic polymer material, and has the advantages of high mechanical strength, high temperature resistance, impact resistance, flame retardance, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, irradiation resistance and good electrical property.
PEK material is polyether ketone poly (etherketone), and the main chain of the high molecular polymer is formed by alternating ether bonds and ketone bonds. The typical polymer is polyaryletherketone, and is a special engineering plastic formed by high-temperature polycondensation of difluorobenzophenone and aromatic dihydric phenol, and can also be prepared by polycondensation of aromatic dihalide and 4,4' -dihydroxybenzophenone into a polymer with high thermal oxygen stability. High mechanical property, belonging to special engineering plastics.
The preparation method for the first brake limiting piece and the second brake limiting piece comprises the following steps: selecting one of polyoxymethylene POM engineering plastic, polyether ketone PEK material and polyether ketone PEEK material, and printing and forming a first brake limiting piece by adopting a 3D printing technology; selecting one of polyoxymethylene POM engineering plastic, polyether ketone PEK material and polyether ketone PEEK material, and printing and forming a second brake limiting piece by adopting a 3D printing technology; and carrying out sand blasting and polishing treatment on the first brake limiting piece and the second brake limiting piece.
It should be noted that, the sand blasting and polishing treatment is to perform surface treatment on the first brake limiting piece and the second brake limiting piece, so as to improve the lubrication degree, high strength, wear resistance, high rigidity and the like of the first brake limiting piece and the second brake limiting piece, and enable the brake limiting piece to be better adapted to the product performance.
It should be noted that, the second brake limiting member may be formed by a carbon fiber rod formed by a carbon fiber material and disposed at a corresponding position of the brake handle.
Before hot press forming, die filling treatment is needed, for example, a first brake limiting piece based on POM engineering plastic forming and a second brake limiting piece based on carbon fiber rod forming are placed into a die cavity, a brake handle pre-die assembled by a cutting die is placed into the die cavity, and the brake limiting pieces are matched with the brake handle pre-die based on the matching relation of final formed products.
In the hot press molding process, the range of the temperature value of the hot press molding is as follows: 140 ℃ to 150 ℃; the time value range of the hot press molding is as follows: 35 minutes to 40 minutes. For example, the temperature value of the hot press molding can be 140 ℃, 145 ℃,150 ℃ and the like, and the time of the hot press molding can be controlled as follows: 35 minutes, 37 minutes, 39 minutes, 40 minutes, etc.
In the hot press molding process, a sectional pressurizing mode is adopted to apply pressure on the product, for example, a 30T pressure value is firstly applied to the product for 1 to 2 minutes, a 50T pressure value is applied to the product for 2 to 4 minutes, and a 100T pressure value is applied to the product until the molding is completed.
The carbon fiber epoxy composite material and the POM engineering plastic are embedded into one body, so that the weight of the brake handle is reduced, the modulus and the strength are increased, and the wear resistance of the brake limiting device is improved.
The brake handle main body adopts a carbon fiber epoxy composite material multi-layer design, materials and angles of different thickness areas are designed according to practical use mechanics requirements, and the brake limiting device can be formed by embedding high-performance POM engineering plastics and the like.
The brake limiting device can be independently printed and formed by adopting a POM engineering plastic 3D printing technology, the brake handle main body is formed by adopting unidirectional carbon fiber prepreg and 3K carbon fiber prepreg cloth in a multi-layer multi-angle laminating mode, the brake limiting device and the brake handle prefabricated body are correspondingly placed in a brake handle forming die in a synchronous mode, high-temperature and high-pressure forming is carried out, the carbon fiber epoxy composite material and the POM engineering plastic are connected through epoxy resin in the carbon fiber prepreg, and the same is also applicable to a brake limiting part hot-press forming mode of other materials.
S15, performing cold treatment on the die;
here, the cold treatment time ranges from 7 minutes to 10 minutes; opening the mould and taking out the formed product; the mold is subjected to cold treatment, so that the product can be rapidly molded, and the mold is conveniently taken out for processing, thereby improving the processing efficiency of the product.
S16, deburring the hot-pressed product;
after the hot-press formed product is opened, different burrs are generated due to components such as epoxy resin, the smoothness of the product is insufficient, and the burr removing treatment is carried out, so that the product meets the attractive requirement and meets the design of product rules.
In the specific implementation process, the deburring process can adopt a file or sand paper to carry out deburring on the product after hot press molding.
S17, machining the hot-pressed product according to the specification and the size of the brake handle to obtain the carbon fiber brake handle with the mounting hole;
the mounting holes are formed in the carbon fiber brake handle formed by hot pressing based on the specification and the size of the brake handle, the carbon fiber brake handle formed by hot pressing is positioned by adopting a processing clamp, and the holes are formed in the corresponding positions, namely the mounting holes.
The product inspection process is also related to, namely, whether the assembly part for the mounting hole is interfered or not, if the assembly part for the mounting hole is not interfered, the mounting hole of the product meets the requirement, and if the assembly hole is interfered, the assembly hole of the product does not meet the requirement.
S18, carrying out sand blasting and polishing treatment on the carbon fiber brake handle;
in the specific implementation process, a sand blasting machine is adopted to evenly spray the surface of the carbon fiber brake handle, and a grinding machine or a grinding machine is adopted to grind the carbon fiber handle.
In the specific implementation process, the air consumption of the sand blasting machine is 5-6 kg, and diamond sand is sprayed to the surface of a product to coarsen the product based on the air consumption, wherein the diamond sand is 80 mesh diamond sand; the product can be polished by sand paper in the polishing process, or by a polisher or a grinder.
And S19, cleaning, spraying paint, polishing and polishing the carbon fiber brake handle after the sand blasting and polishing treatment to obtain a molded product.
It should be noted that, the cleaning can be performed by adding water to the cleaning machine to clean the product, or by using ultrasonic waves to clean the carbon fiber handle surface ash impurities. The surface of the product polished by sand blasting involves dust, carbon fiber dust, and the like.
After cleaning, the baking temperature of the carbon fiber brake handle is controlled between 70 ℃ and 80 ℃ and the baking time is controlled between 35 minutes and 45 minutes, so that a product can enter a paint spraying process faster, when the surface of the carbon fiber brake handle is not dry and has humidity, paint can be bubbled, the paint is easy to peel off from the body, and the paint adhesion is insufficient.
The dried product can be used for wiping the surface of the carbon fiber brake handle with alcohol, then spraying primer, polishing and spraying finish, wherein polishing mainly shows whether sand marks are marked, and the product relates to a dry grinding and water grinding process, wherein the dry grinding can be a sand grinding process, and the water grinding process can be an ultrasonic cleaning process.
The polishing treatment is to remove impurities and paint on the surface of the carbon fiber brake handle, enhance the brightness of the carbon fiber brake handle, and polish the surface of the carbon fiber brake handle by using wool wheels and wax in the specific implementation process.
Specifically, fig. 2 shows a schematic structural diagram of a carbon fiber brake handle according to an embodiment of the present invention, where the carbon fiber brake handle includes: the brake handle body 21, and the brake limiting device that is located on the brake handle body, namely, first brake limiting piece 22 and second brake limiting piece 23, have mounting hole on the brake handle body 21, namely mounting hole 24 and mounting hole 25, brake handle body 21 can be in the shaping of S11 to S14 in-process, brake limiting device is in the shaping of S14, the mounting hole is in the shaping of processing in S17, the carbon fiber brake handle overall structure that fig. 2 shows is by the method shaping that fig. 1 shows, it has intensity height, carbon fiber brake handle is lighter and wearability stronger than non-carbon fiber brake handle based on the carbon fiber brake handle that the shaping shown in fig. 1 shows.
The brake limiting device can be independently printed and formed by adopting a POM engineering plastic 3D printing technology, the brake handle main body adopts unidirectional carbon fiber prepreg and 3K carbon fiber prepreg cloth to be laminated in a multi-layer and multi-angle mode, the brake limiting device and the brake handle prefabricated body are correspondingly placed in a brake handle forming die synchronously, and the brake limiting device and the brake handle prefabricated body are formed at high temperature and high pressure and are connected with the carbon fiber epoxy composite material and the POM engineering plastic through epoxy resin in the carbon fiber prepreg. The carbon fiber brake handle prepared by the method has high strength, reduces the quality of the original carbon fiber brake handle, improves the performance of the whole brake handle, and ensures that the brake handle has better wear resistance.
The foregoing has outlined rather broadly the more detailed description of embodiments of the invention in order that the detailed description of the principles and embodiments of the invention may be implemented in conjunction with the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (8)
1. A method of making a carbon fiber brake handle, comprising the steps of:
cutting the carbon fiber prepreg and the 3k diagonal carbon fiber prepreg cloth based on a brake handle laminating book to obtain the required carbon fiber prepreg cloth and the 3k diagonal carbon fiber prepreg cloth;
attaching carbon fiber prepreg cloth and 3k twill carbon fiber prepreg cloth according to a brake handle attaching book, and attaching the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-mold according to an attaching layer combination mode;
assembling the brake handle preforming die based on a cutting die, and vacuumizing and shaping the brake handle preforming die;
placing the brake handle preforming die and the brake limiting device in a die for hot press molding, and applying pressure on the product in a sectional pressurizing mode;
machining the hot-pressed product according to the specification and the size of the brake handle to obtain the carbon fiber brake handle with the mounting hole;
performing sand blasting and polishing treatment on the carbon fiber brake handle;
cleaning, spraying paint, grinding and polishing the carbon fiber brake handle after the sand blasting and polishing treatment to obtain a molded product;
the brake limiting device includes: the first brake limiting piece is made of one of polyoxymethylene POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and the second brake limiting piece is made of one of polyoxymethylene POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials;
the method further comprises the steps of:
selecting one of polyoxymethylene POM engineering plastic, polyether ketone PEK material and polyether ketone PEEK material, and printing and forming a first brake limiting piece by adopting a 3D printing technology;
selecting one of polyoxymethylene POM engineering plastic, polyether ketone PEK material and polyether ketone PEEK material, and printing and forming a second brake limiting piece by adopting a 3D printing technology;
and carrying out sand blasting and polishing treatment on the first brake limiting piece and the second brake limiting piece.
2. The method of making a carbon fiber brake handle according to claim 1, wherein the carbon fiber prepreg comprises: 150g of unidirectional carbon fiber prepreg and 300g of unidirectional carbon fiber prepreg.
3. The method of making a carbon fiber brake handle according to claim 1, wherein the 3k twill carbon fiber prepreg cloth is attached to the inner and outer layers.
4. The method of making a carbon fiber brake handle according to claim 1, wherein the tailoring the carbon fiber prepreg and the 3k twill carbon fiber prepreg based on the brake handle overlay book comprises:
inputting a 2D drawing related to a laminated book based on a brake handle into an automatic yarn cutting machine;
and cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth according to a 2D drawing by an automatic yarn cutting machine.
5. The method for preparing a carbon fiber brake handle according to claim 1, wherein the hot press forming temperature value ranges are as follows: 140 ℃ to 150 ℃; the time value range of the hot press molding is as follows: 35 minutes to 40 minutes.
6. The method for manufacturing a carbon fiber brake handle according to claim 1, wherein the placing of the evacuated shaped brake handle preform and brake restraint into the mold for hot press molding further comprises:
carrying out cold treatment on the die, wherein the cold treatment time ranges from 7 minutes to 10 minutes;
and opening the die and taking out the molded product.
7. The method for manufacturing a carbon fiber brake handle according to claim 6, wherein the placing of the evacuated shaped brake handle preform and brake restraint into the mold for hot press molding further comprises:
and (5) carrying out deburring treatment on the hot-pressed product.
8. A method of making a carbon fiber brake handle as defined in any one of claims 1 to 7, wherein said grit blasting the carbon fiber brake handle comprises:
and uniformly spraying carbon fiber on the surface of the brake handle by adopting a sand blasting machine, and polishing the carbon fiber handle by adopting a polisher or a grinder.
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| CN113895052A (en) | 2022-01-07 |
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