A kind of cycle frame and its integrated forming manufacture method
Abstract
A kind of cycle frame and its integrated forming manufacture method, manufacture method are carried out by following step is poly-:1. customization is drawn；2. synchronous die sinking；3. integral blank；4. integral construction materials contract；5. integrated charging is molded；6. finish, integrated charging shaping in vehicle frame mould is sent into after directly pasting cladding EPS core rods using monoblock carbon fiber gauze, reduce process and save the production time, materials'use rate is improved again, the defects of avoiding carbon fiber gauze stress deformation, and EPS mold insert structures are stable, die material be not easily broken and gas leakage cause deform carbon fiber gauze, ensure that depanning product is indeformable, improve product qualification rate, EPS core rods correspond production and application as disposable part and single-piece cycle frame finished product, ensure machining accuracy, improve product quality, meet the use demand of self customization of client.
Description
Technical field
The present invention relates to bicycle art, and in particular to a kind of cycle frame and its integrated forming manufacture method.
Background technology
At present, cycle frame is made of aluminium alloy, titanium alloy etc materials mostly, and these vehicle frames have weight weight, is carried The shortcomings of difficult, rigid insufficient, solve these shortcomings someone for this and invented a kind of bicycle being fabricated using carbon fiber Vehicle frame, carbon fiber is as a kind of emerging reinforcing fiber, and not only the intrinsic intrinsic property with carbon material, has textile fabric concurrently again Soft machinability, 1/4 of its proportion less than steel, but intensity is very high, and corrosion resistance is transcendent, is produced from driving a vehicle Especially one of ideal material of racing bicycles' vehicle frame.
Now the manufacture method of bicycle frame of carbon fiber be first one piece of carbon fiber gauze cut according to fame dimensions it is more The small carbon fiber gauze of block, then the several parts for frame that the small carbon fiber gauze of polylith separately individually hired a car, it is fine toward the carbon wrapped afterwards Load airbag in dimension gauze, be finally putting into mould high temperature compression molding and make the multiple parts of vehicle frame, multiple part splicings are glued Group founds into a bogie frame, the vehicle frame produced in this way, the company between adjacent carbon fiber yarn cloth and carbon fiber gauze The place of connecing can be easily separated and cause intensity insufficient, and the time-consuming longer and consumptive material of polylith carbon fiber gauze splicing is more, material use The relatively low increase production cost of rate, production efficiency is low, therefore, Chinese patent application CN201610522166.9 discloses a kind of carbon Fiber cycle frame integral forming process, production efficiency height is improved using the integrally formed method of carbon fiber bicycle frame, still It is in the patent application after first entering driving frame sizing using the carbon fiber yarn cloth winding silica gel volume heart, then silica gel is rolled up the heart silica gel volume heart Taking-up is substituted for airbag and valve, and airbag and valve need to be put into the die for molding of high temperature together with carbon fiber gauze, this fixed The shortcomings that type method, is on the one hand change the outfit airbag and valve tedious process, and carbon fiber gauze can stress change when taking out the silica gel volume heart Shape, another aspect airbag and valve are unstable at high temperature, in process meeting gas leakage, influence depanning vehicle frame and go bad, cause car Frame yields is very low to can only achieve 50~60%,.
The content of the invention
For problems of the prior art, the invention provides a kind of cycle frame and its manufacturer is integrally formed Method, it is vertical without multiple parts are carried out group without cutting polylith carbon fiber gauze, production efficiency is improved, reduces spliced materials Use, reduce production cost, preferably ensure that the continuity and ductility of carbon yarn, while also substantially increase the strong of vehicle frame Degree, concrete technical scheme are as follows：
A kind of cycle frame integrated forming manufacture method, carried out by following step is poly-:
1. customization is drawn, vehicle frame 3D models are drawn according to the requirement of cycle frame finished product on computers, according to vehicle frame 3D moulds Type, draw out vehicle frame mould 3D models and EPS mould 3D models, cavity dimension and the vehicle frame 3D model scales of vehicle frame mould 3D models Very little equal, the cavity dimension of EPS mould 3D models carries out equal proportion scaling by vehicle frame 3D moulded dimensions and formed；
2. synchronous die sinking, vehicle frame mould and EPS moulds are produced according to the mould 3D models of drafting and EPS mould 3D models respectively Tool, the EPS core rods of first use is gone out using EPS Making molds, EPS core rods are hollow-core construction, and EPS core surfaces coat latex；
3. integral blank, according to the moulding of cycle frame, while according to the intensity, rigidity and weight requirements of vehicle frame different parts, Using stamping machine with cutting die cut out the different angle being engaged with cycle frame, different size monoblock carbon fiber gauze；
4. integral construction materials contract, carbon fiber gauze is pasted and is coated on EPS core surfaces；
5. integrated charging is molded, by being put into vehicle frame mould for EPS core rods, toward EPS core rods inner inflatable and inflation inlet is closed, Pressurize compression molding in 50 ± 2 minutes is semi-finished product vehicle frame in the table that temperature is 150 ± 5 DEG C, air pressure is 1 ± 0.2MPa；
6. finishing, open inflation inlet and the gas inside EPS core rods extracted out, EPS core rods volume contraction 70%~80% and from half It is removed in finished product vehicle frame, semi-finished product vehicle frame is put into progress surface coarsening in sand-blasting machine and is processed into cycle frame finished product.
As a kind of preferred scheme of the inventive method, step also includes entering drawn 3D models using computer in gathering 1. Row stress analysis, accurately calculate each end points of vehicle frame, inflection point, the stressing conditions and thickness of intersection, the type of EPS moulds Chamber size carries out proportional zoom by stress analysis result and drawn.
As a kind of preferred scheme of the inventive method, carbon fiber yarn, which is furnished with two pieces and pasted respectively, is coated on EPS core rods Upper and lower surface.
As a kind of preferred scheme of the inventive method, it is 10 MPa that the step, which gathers 5. middle table pressure,.
As a kind of preferred scheme of the inventive method, the sand-blasting machine 6. step is gathered in is ejected into semi-finished product using carborundum pin Vehicle frame surface carries out surface coarsening processing.
A kind of cycle frame, produced using above-mentioned cycle frame integrated forming manufacture method.
Beneficial effects of the present invention：Vehicle frame mould is sent into after directly pasting cladding EPS core rods using monoblock carbon fiber gauze The shaping of middle integrated charging, the silica gel volume heart is taken out relative to prior art and is substituted for airbag and valve, that is, reduce process and Save the production time, improved materials'use rate, the defects of avoiding carbon fiber gauze stress deformation again, and EPS mold insert structures are steady It is fixed, it is not easily broken in die material and gas leakage causes to deform carbon fiber gauze, ensures that depanning product is indeformable, it is qualified to improve product Rate makes up to more than 95% in addition, EPS core rods correspond production as disposable part with single-piece cycle frame finished product With, ensure machining accuracy, improve product quality, meet client self customization use demand.
Brief description of the drawings
Fig. 1 is the FB(flow block) of manufacture method of the present invention；
Fig. 2 is the structural representation of vehicle frame of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described further：
As shown in figure 1, a kind of cycle frame integrated charging moulding manufacture method, is carried out by following step is poly-:
1. customization is drawn, vehicle frame 3D models are drawn according to the requirement of cycle frame finished product on computers, according to vehicle frame 3D moulds Type, draw out vehicle frame mould 3D models and EPS mould 3D models, cavity dimension and the vehicle frame 3D model scales of vehicle frame mould 3D models Very little equal, the cavity dimension of EPS mould 3D models carries out equal proportion scaling by vehicle frame 3D moulded dimensions and formed, and equal proportion coefficient is 0.9th, 0.8,0.7 etc.；
2. synchronous die sinking, vehicle frame mould and EPS moulds are produced according to the mould 3D models of drafting and EPS mould 3D models respectively Tool, the EPS core rods of first use are gone out using EPS Making molds（EPS is polystyrene foam）, EPS core rods are hollow-core construction, often The lower EPS core rods of temperature will not deform, and ensure follow-up sizing construction materials contract, and EPS core surfaces coat latex, vehicle frame mold cavity size and The phase difference of EPS mold cavity sizes is equal to the follow-up poly- carbon fiber gauze 4. of step and pastes thickness；
3. integral blank, according to the moulding of cycle frame, while according to the intensity, rigidity and weight requirements of vehicle frame different parts, Using stamping machine with cutting die cut out the different angle being engaged with cycle frame, different size monoblock carbon fiber gauze, Different size refers to the carbon fiber gauze of different-thickness, different angle refer to monoblock carbon fiber gauze go forward triangle, it is rear on The angle of the different parts such as Chain stay is pitched, connection is mutually staggered in order to avoid interfering when different parts are cut, and is disposably cut whole Block carbon fiber gauze is relative to cut polylith carbon fiber gauze speed faster, and stock utilization is higher；
4. integral construction materials contract, carbon fiber gauze is pasted and is coated on EPS core surfaces；
5. integrated charging is molded, the EPS core rods for having pasted carbon fiber gauze are put into vehicle frame mould, tracheae can be inserted and connected Inside EPS core rods, after source of the gas fills EPS core rods inside by tracheae, tracheae is extracted and closes inflation inlet, inflation makes EPS moulds Core expands, and avoids EPS core rods from being inside contracted in a mold because of high temperature, influences vehicle frame compact dimensions, vehicle frame mould is put into shaping high temperature In stove, the pressurize 50 ± 2 minutes in the table that temperature is 150 ± 5 DEG C, air pressure is 1 ± 0.2MPa, table pressure is 10 MPa, Molding one-shot forming is semi-finished product vehicle frame, relative to the multiple parts assemblies of prior art, reduces production process, speed of production is more It hurry up, and improve intensity；
6. finishing, after 150 ± 5 DEG C in stove of high temperature action, EPS core rods can soften EPS core rods, open inflation inlet handle Gas inside EPS core rods is extracted out, EPS core rods volume contraction 70%~80%, now using tool EPS core rods from semi-finished vehicles Frame is taken out in inside, and semi-finished product vehicle frame is put into sand-blasting machine, and sand-blasting machine is ejected into semi-finished product vehicle frame surface using carborundum pin and entered Row surface coarsening is processed into cycle frame finished product.
Specifically, step also includes carrying out stress analysis to drawn 3D models using computer in gathering 1., accurately calculate The each end points of vehicle frame, inflection point, the stressing conditions and thickness of intersection, the cavity dimension of EPS moulds press stress analysis result Carry out proportional zoom to draw, improve machining accuracy, ensure that dimension of bicycle frame meets the requirements, in addition, the poly- 4. carbon fiber of step Gauze, which has two pieces and pasted respectively, is coated on EPS core rod upper and lower surfaces, and construction materials contract is close, leaves no gaps, and processing is easier.
In addition, a kind of cycle frame, is produced using above-mentioned cycle frame integrated forming manufacture method, carbon yarn Continuity and ductility are very good, and frame strength meets to require, and the car of different-thickness can be produced by more preferable EPS core rods Frame, realize that self is customized.
In summary, integrated forming manufacture method of the invention has used EPS core rods, EPS core rods one in process of production Secondary property uses（EPS core rods once were used to reduce softening）, a corresponding cycle frame finished product production and application, improve Precision is produced, and for carbon fiber gauze in the prior art is by core magazine and the dual sizing of airbag, this hair The bright effect that above-mentioned two part can be completed only with EPS core rods, process is on the one hand reduced so as to save man-hour, it is another Aspect EPS core rods are more more reliable than airbag, will not gas leakage in process, by producing the EPS core rods of different size just Vehicle frame can be achieved self to customize.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert The specific implementation of the present invention is confined to these explanations, for general technical staff of the technical field of the invention, On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's Protection domain.
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