CN113895052A - Method for preparing carbon fiber brake handle - Google Patents
Method for preparing carbon fiber brake handle Download PDFInfo
- Publication number
- CN113895052A CN113895052A CN202111027664.3A CN202111027664A CN113895052A CN 113895052 A CN113895052 A CN 113895052A CN 202111027664 A CN202111027664 A CN 202111027664A CN 113895052 A CN113895052 A CN 113895052A
- Authority
- CN
- China
- Prior art keywords
- carbon fiber
- brake handle
- brake
- fiber prepreg
- prepreg cloth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 149
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 149
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000004744 fabric Substances 0.000 claims abstract description 46
- 238000005498 polishing Methods 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 238000005488 sandblasting Methods 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 239000012790 adhesive layer Substances 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000003973 paint Substances 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims abstract description 5
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- 238000000465 moulding Methods 0.000 claims description 16
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 15
- 229920001643 poly(ether ketone) Polymers 0.000 claims description 15
- 229920002530 polyetherether ketone Polymers 0.000 claims description 15
- 229920008285 Poly(ether ketone) PEK Polymers 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000010146 3D printing Methods 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 9
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- 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
- 238000007493 shaping process Methods 0.000 description 11
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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
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
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- 229920001169 thermoplastic Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
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
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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
- 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
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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
- B29C70/06—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
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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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
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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
- 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
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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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
- B29C70/68—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
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- 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
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- 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
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- 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
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 adhesive layer book; according to the brake handle adhesive layer book, adhering carbon fiber prepreg cloth and 3k twill carbon fiber prepreg cloth, and adhering the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-forming die in an adhesive layer combination mode; assembling the brake handle pre-forming die based on the cutting die, and vacuumizing and forming the brake handle pre-forming die; putting the brake handle pre-forming die and the brake limiting device which are vacuumized and shaped into a die for hot press forming; machining the hot-press molded product according to the specification and the size of the brake handle to obtain a carbon fiber brake handle with a mounting hole; and cleaning, spraying paint, grinding and polishing the carbon fiber brake handle subjected to 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
Brake handles are essential components in the construction of electric vehicles, motorcycles and bicycles.
The existing assembly structure of the brake handle on a vehicle is only tightly fixed on the periphery of a handlebar through a mounting ring and a bolt in a cladding mode, and the brake handle is only fixed relative to the handlebar in the circumferential direction through single friction. When a driver suddenly and violently pinches the brake in an emergency, the brake handle is easily rotated by an overlarge acting force, so that the brake handle is separated from the brake handle, the brake is not in place, and the vehicle cannot be stopped in time to cause a driving accident. The existing brake handle is 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 a 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 twill carbon fiber prepreg cloth based on the brake handle overlay book to obtain the required carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth;
according to the brake handle adhesive layer book, adhering carbon fiber prepreg cloth and 3k twill carbon fiber prepreg cloth, and adhering the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-forming die in an adhesive layer combination mode;
assembling the brake handle pre-forming die based on the cutting die, and vacuumizing and forming the brake handle pre-forming die;
putting the brake handle pre-forming die and the brake limiting device which are vacuumized and shaped into a die for hot press forming;
machining the hot-press molded product according to the specification and the size of the brake handle to obtain a carbon fiber brake handle with a mounting hole;
carrying out sand blasting and polishing treatment on the carbon fiber brake handle;
and cleaning, grinding, spraying paint, grinding and polishing the carbon fiber brake handle subjected to sand blasting and grinding 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.
Cut out carbon fiber prepreg and 3k twill carbon fiber prepreg cloth based on brake handle pastes layer book and includes:
inputting a 2D drawing related to a brake handle overlay book into an automatic yarn cutting machine;
and cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth by the automatic yarn cutting machine according to a 2D drawing.
Brake stop device includes: the brake device comprises a first brake limiting part and a second brake limiting part, wherein the first brake limiting part is made of one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and the second brake limiting part is made of one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials, polyether ketone PEEK materials and carbon fiber materials.
The method further comprises the following steps:
selecting one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and printing and molding a first brake limiting part by adopting a 3D printing technology;
selecting one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and printing and molding a second brake limiting part by adopting a 3D printing technology;
and carrying out sand blasting and polishing treatment on the first brake limiting part and the second brake limiting part.
The value range of the temperature value of the hot-press forming is as follows: 140 ℃ to 150 ℃; the time value range of the hot-press molding is as follows: 35 to 40 minutes.
Still include after putting into the mould to the brake lever pre-forming die of managing to find time the design and brake stop device and carrying out hot briquetting:
performing cold treatment on the mold, wherein the cold treatment time ranges from 7 minutes to 10 minutes;
and opening the mold to take out the molded product.
Still include after putting into the mould to the brake lever pre-forming die of managing to find time the design and brake stop device and carrying out hot briquetting:
and (4) performing deburring treatment on the hot-press molded product.
The sand blasting to carbon fiber brake handle is polished and is handled and include:
the surface of the carbon fiber brake handle is uniformly sprayed by a sand blasting machine, and the carbon fiber brake handle is polished by a grinding machine or a grinding machine.
According to the method provided by the embodiment of the invention, the brake limiting device can be independently printed and molded by using a POM engineering plastic 3D printing technology, the brake handle main body adopts a unidirectional carbon fiber prepreg and a 3K carbon fiber prepreg multi-layer multi-angle laminating preform, the brake limiting device and the brake handle preform completion body are synchronously and correspondingly placed in a brake handle molding die, high-temperature and high-pressure molding is carried out, and the carbon fiber epoxy composite material and the POM engineering plastic are connected 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 present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
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 in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a flow chart of a method for manufacturing a carbon fiber brake handle in 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 twill carbon fiber prepreg cloth based on the brake handle adhesive layer book to obtain the required carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth;
specifically, should cut out carbon fiber prepreg and 3k twill carbon fiber prepreg cloth based on brake lever pastes layer book and include: inputting a 2D drawing related to a brake handle overlay book into an automatic yarn cutting machine; automatic yarn cutting machine cuts out carbon fiber prepreg and 3k twill carbon fiber prepreg according to the 2D drawing to cut out required tablet.
The brake handle paste layer book is equivalent to a manufacturing process manual, and a plurality of carbon fiber prepreg fabrics needing to be pasted and the shapes, the sizes and the like cut by the carbon fiber fabrics are designed according to the specifications 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 twill carbon fiber prepreg cloth according to the brake handle adhesive layer book, and attaching the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-forming die according to an adhesive layer combination mode;
the carbon fiber prepreg cloth involves 150g of one-way carbon fiber prepreg cloth of 2 to 5 pieces and 300g of one-way carbon fiber prepreg cloth of 2 to 5 pieces to and 2 pieces of 3k twill carbon fiber prepreg cloth, and the laminating of this 3k twill carbon fiber prepreg cloth is in nexine and skin, 150g of one-way carbon fiber prepreg cloth and 300g of one-way carbon fiber prepreg cloth alternately laminate in an organic whole according to laminating component mode, final shaping brake handle preforming mould.
It should be noted that, in the process of laminating, can brush one deck cyanate resin between the bed of cloth, here cyanate resin can make the laminating in-process reduce the bubble, makes things convenient for the evacuation design, because adopts cyanate resin can be when hot briquetting for the material between cyanate resin and the carbon fiber cloth fuses, fuses to the layered structure between the whole carbon fiber brake handle with higher speed, reduces the shaping time, improves the shaping efficiency.
S13, assembling the brake handle pre-forming die based on the cutting die, and vacuumizing and shaping the brake handle pre-forming die;
assemble brake lever preforming mould through cutting die for the cloth pressfitting between the fashioned brake lever preforming mould of laminating is compacter, avoids having bigger gap, also makes things convenient for the better adaptation of brake lever preforming mould in hot briquetting's mould, finalizes the design to brake lever preforming mould evacuation, makes the air between the laminating reduce, reduces the bubble shaping in the hot briquetting in-process in the product, strengthens the rigidity and the hardness of product, reduces the defective rate of product.
S14, putting the brake handle pre-forming die and the brake limiting device which are vacuumized and shaped into a die for hot press forming;
the brake limiting device comprises: the brake device comprises a first brake limiting part and a second brake limiting part, wherein the first brake limiting part is made of one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and the second brake limiting part is made of one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials, polyether ketone PEEK materials and carbon fiber materials.
POM (polyformaldehyde) engineering plastic, namely polyformaldehyde engineering plastic: polyoxymethylene is a linear polymer with no side chains, high density, and high crystallinity. According to the difference of chemical structures in molecular chains, the polymer can be divided into polyformaldehyde and copolyformaldehyde. The important differences between the two are: the homo-polyformaldehyde has high density, crystallinity and melting point, but has poor thermal stability, narrow processing temperature range (about 10 ℃) and slightly low acid-base stability; the polyformaldehyde has low density, crystallinity, melting point and strength, but has good thermal stability, difficult decomposition, wide processing temperature range (about 50 ℃) and good stability to acid and alkali. Is an engineering plastic with excellent comprehensive performance. Has good physical, mechanical and chemical properties, especially excellent friction resistance. Commonly known as racing steel or robbing steel, is the third major engineering plastic. It is suitable for making wear-resisting parts, transmission parts, chemical engineering and instrument parts.
PEEK is a special engineering plastic with excellent properties 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 crystal 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.
The PEK material is polyether ketone poly (etherketone), and the main chain is a high molecular polymer formed by alternating ether bonds and ketone bonds. The typical polymer is polyaryletherketone, a special engineering plastic prepared by high-temperature polycondensation of difluorobenzophenone and aromatic dihydric phenol, or prepared by polycondensation of aromatic dihalide and 4,4' -dihydroxybenzophenone, and has high thermal oxidative stability. High mechanical property, belonging to special engineering plastics.
The method for preparing the first brake limiting part and the second brake limiting part comprises the following steps: selecting one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and printing and molding a first brake limiting part by adopting a 3D printing technology; selecting one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and printing and molding a second brake limiting part by adopting a 3D printing technology; and carrying out sand blasting and polishing treatment on the first brake limiting part and the second brake limiting part.
It should be noted that, here, the sand blasting and polishing process is to perform a surface treatment on the first brake limiting member and the second brake limiting member, so as to improve the lubrication degree, the high strength, the wear resistance, the high rigidity, and the like of the first brake limiting member and the second brake limiting member, and to make the brake limiting member better adapt to the product performance.
It should be noted that, the second brake limiting member here can also be formed by molding a carbon fiber rod through a carbon fiber material and disposed at a corresponding position of the brake handle.
Before hot press forming, mold filling processing is required, for example, a first brake limiting part formed based on POM engineering plastics and a second brake limiting part formed based on a carbon fiber rod are placed into a mold cavity, a brake handle pre-forming mold assembled by a cutting mold is placed into the mold cavity, and the brake limiting part is matched with the brake handle pre-forming mold based on the matching relation of a final formed product.
In the hot press forming process, the value range of the temperature value of the hot press forming is as follows: 140 ℃ to 150 ℃; the time value range of the hot-press molding is as follows: 35 to 40 minutes. For example, the temperature value of the hot press forming may be 140 ℃, 145 ℃, 150 ℃ or the like, and the time of the hot press forming may be controlled as follows: 35 minutes, 37 minutes, 39 minutes, 40 minutes, and so forth.
In the hot press forming process, a sectional pressurizing mode is adopted to apply pressure on the product, for example, a 30T pressure value is firstly applied to act on the product for 1 minute to 2 minutes, then a 50T pressure value is applied to act on the product for 2 minutes to 4 minutes, and then a 100T pressure value is applied to act on the product until forming is completed.
The carbon fiber epoxy composite material and the POM engineering plastic are embedded and integrally formed, 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 part adopts carbon fiber epoxy composite material multilayer design, designs the material and the angle design in different thickness district according to the mechanical requirement of in-service use, and brake stop device can adopt high performance POM engineering plastics etc. to bury integrated into one piece.
Brake stop device can adopt POM engineering plastics 3D printing technique to print the shaping alone, and the brake lever main part adopts one-way carbon fiber preimpregnation material and 3K carbon fiber preimpregnation cloth multilayer multi-angle laminating preforming, and brake stop device and brake lever preforming completion body correspond in brake lever forming die in step, and high temperature high pressure shaping connects carbon fiber epoxy composite material and POM engineering plastics through the epoxy in the carbon fiber preimpregnation material, also is applicable to the brake locating part hot briquetting mode of other materials on the same principle.
S15, performing cold treatment on the die;
note that, here, the cold treatment time ranges from 7 minutes to 10 minutes; opening the mold and taking out the molded product; the cold treatment is carried out on the die, so that the product can be quickly formed and can be conveniently taken out for processing, and the product processing efficiency is improved.
S16, deburring the hot-press formed product;
after the die sinking of hot briquetting's product, because components such as epoxy can produce different deckle edges, and product smoothness etc. are not enough, carry out the unhairing limit here and handle for the product accords with pleasing to the eye requirement more, and accords with product rule design.
In the specific implementation process, the deburring treatment can be performed on the product after the hot press molding by adopting a file or sand paper.
S17, machining the hot-press molded product according to the specification and the size of the brake handle to obtain a carbon fiber brake handle with a mounting hole;
the carbon fiber brake handle is formed by hot-press forming, wherein the carbon fiber brake handle is provided with a mounting hole based on the specification and the size of the brake handle, the carbon fiber brake handle is specifically positioned by a machining clamp, and the carbon fiber brake handle is provided with a hole at a corresponding position, wherein the hole is the mounting hole.
The product inspection process is also involved, namely whether the assembly of the mounting holes by the assembly parts is interfered or not, if the assembly is not interfered, the mounting holes of the product are in accordance with the requirement, and if the assembly is interfered, the assembly is not in accordance with the requirement.
S18, carrying out sand blasting and polishing treatment on the carbon fiber brake handle;
in the specific implementation process, the surface of the carbon fiber brake handle is uniformly sprayed by a sand-blasting machine, and the carbon fiber brake handle is polished by a polishing machine or a grinding machine.
In the specific implementation process, the air consumption of the sand blasting machine is 5-6 kilograms of air pressure, and the carborundum is sprayed to the surface of the product to be coarsened on the basis of the air pressure, wherein the carborundum is 80 meshes of carborundum; the polishing process can be performed by using sand paper, and the product can also be polished by using a polisher or a grinder.
S19, cleaning, painting, grinding and polishing the carbon fiber brake handle after sand blasting and grinding treatment to obtain a molded product.
It should be noted that the cleaning here can be performed by adding water to the cleaning machine to clean the product, or by using ultrasonic cleaning, and the cleaning is mainly to clean the dust impurities on the surface of the carbon fiber handle. The surface of the product subjected to sand blasting involves dust, carbon fiber dust, and the like.
After the cleaning, the baking of the carbon fiber brake handle is also involved, the baking temperature is controlled between 70 ℃ and 80 ℃, the time is between 35 minutes and 45 minutes, the product can enter the paint spraying process more quickly by the baking purpose, when the surface of the carbon fiber brake handle is not dry and has humidity, the paint can generate bubbles, the paint is easily stripped from the body, and the paint adhesion is not enough.
The dried product can be subjected to alcohol wiping on the surface of the carbon fiber brake handle and then spraying primer, and then is polished and then sprayed with finish, wherein the polishing is mainly carried out according to whether sand marks exist or not, and the dry polishing and the water polishing involve the processes of dry polishing and water polishing, wherein the dry polishing can be carried out by using sand paper, and the water polishing can be carried out by ultrasonic cleaning.
The polishing treatment is a process of removing impurities and paint on the surface of the carbon fiber brake handle, so that the brightness of the carbon fiber brake handle is enhanced, and the surface of the carbon fiber brake handle can be polished by using a wool wheel and adding wax in the specific implementation process.
Specifically, fig. 2 shows a schematic structural diagram of a carbon fiber brake handle in an embodiment of the present invention, which includes: brake lever main part 21, and be located the brake stop device on the brake lever main part and be first brake locating part 22 and second brake locating part 23, the last mounting hole that has of brake lever main part 21 is mounting hole 24 and mounting hole 25 promptly, brake lever main part 21 can be at S11-S14 in-process shaping, brake stop device is at S14 shaping, the mounting hole is the machine-shaping in S17, the carbon fiber brake lever overall structure shown in fig. 2 is by the method shaping shown in fig. 1, based on the fashioned carbon fiber brake lever that shown in fig. 1 it has intensity height, carbon fiber brake lever is lighter and the wearability is stronger than non-carbon fiber brake lever.
The brake limiting device in the embodiment of the invention can be independently printed and molded by adopting a POM engineering plastic 3D printing technology, the brake handle main body adopts a multi-layer multi-angle laminating pre-mold of unidirectional carbon fiber prepreg and 3K carbon fiber prepreg, the brake limiting device and the brake handle pre-mold completion body are synchronously and correspondingly placed in a brake handle molding die, molding is carried out at high temperature and high pressure, and the carbon fiber epoxy composite material and the POM engineering plastic are connected by 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 detailed description is provided for the embodiments of the present invention, and the principles and embodiments of the present invention are described herein using specific examples, which are provided only for the purpose of assisting understanding of the method and the core concepts thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of making a carbon fiber brake handle, comprising the steps of:
cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth based on the brake handle overlay book to obtain the required carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth;
according to the brake handle adhesive layer book, adhering carbon fiber prepreg cloth and 3k twill carbon fiber prepreg cloth, and adhering the carbon fiber prepreg cloth and the 3k twill carbon fiber prepreg cloth into a brake handle pre-forming die in an adhesive layer combination mode;
assembling the brake handle pre-forming die based on the cutting die, and vacuumizing and forming the brake handle pre-forming die;
putting the brake handle pre-forming die and the brake limiting device which are vacuumized and shaped into a die for hot press forming;
machining the hot-press molded product according to the specification and the size of the brake handle to obtain a carbon fiber brake handle with a mounting hole;
carrying out sand blasting and polishing treatment on the carbon fiber brake handle;
and cleaning, spraying paint, grinding and polishing the carbon fiber brake handle subjected to sand blasting and polishing treatment to obtain a molded product.
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 layer and the outer layer.
4. The method of making a carbon fiber brake handle according to claim 1, wherein cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth based on the brake handle overlay book comprises:
inputting a 2D drawing related to a brake handle overlay book into an automatic yarn cutting machine;
and cutting the carbon fiber prepreg and the 3k twill carbon fiber prepreg cloth by the automatic yarn cutting machine according to a 2D drawing.
5. The method of making a carbon fiber brake handle of claim 1 wherein the brake spacing device comprises: the brake device comprises a first brake limiting part and a second brake limiting part, wherein the first brake limiting part is made of one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and the second brake limiting part is made of one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials, polyether ketone PEEK materials and carbon fiber materials.
6. The method of making a carbon fiber brake handle according to claim 5, further comprising:
selecting one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and printing and molding a first brake limiting part by adopting a 3D printing technology;
selecting one of polyformaldehyde POM engineering plastics, polyether ketone PEK materials and polyether ketone PEEK materials, and printing and molding a second brake limiting part by adopting a 3D printing technology;
and carrying out sand blasting and polishing treatment on the first brake limiting part and the second brake limiting part.
7. The method for preparing the carbon fiber brake handle according to claim 1, wherein 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 to 40 minutes.
8. The method for preparing the carbon fiber brake handle according to claim 1, wherein the step of placing the evacuated and shaped brake handle preform and the brake limiting device into a mold for hot press forming further comprises:
performing cold treatment on the mold, wherein the cold treatment time ranges from 7 minutes to 10 minutes;
and opening the mold to take out the molded product.
9. The method for preparing the carbon fiber brake handle according to claim 8, wherein the step of placing the evacuated and shaped brake handle preform mold and the brake limiting device into a mold for hot press forming further comprises:
and (4) performing deburring treatment on the hot-press molded product.
10. The method of manufacturing a carbon fiber brake handle according to any one of claims 1 to 9, wherein the sand blasting the carbon fiber brake handle comprises:
the surface of the carbon fiber brake handle is uniformly sprayed by a sand blasting machine, and the carbon fiber brake handle is polished by a grinding machine or a grinding machine.
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