CN107031072B - A kind of lossless integrated method for drilling of woven composite hollow member - Google Patents
A kind of lossless integrated method for drilling of woven composite hollow member Download PDFInfo
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- CN107031072B CN107031072B CN201710252590.0A CN201710252590A CN107031072B CN 107031072 B CN107031072 B CN 107031072B CN 201710252590 A CN201710252590 A CN 201710252590A CN 107031072 B CN107031072 B CN 107031072B
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- Prior art keywords
- drilling
- hollow member
- integrated method
- composite hollow
- woven composite
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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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
Abstract
The present invention relates to a kind of lossless integrated method for drilling of woven composite hollow member, it is comprised the technical steps that: according to the geometrical feature of required preparation structure part, design the metal core that can be extracted, manufacture core shaft die, corresponding embedded hole and shape control plug are designed according to the position of drilling and shape, metal central spindle is placed in mold, the wax or high molecular polymer being then injected under molten condition, make covering waxing or high molecular polymer on the metal core, as compound mandrel, the mandrel will be then clamped on the drawing mechanism of braiding device, obtain the braiding mandrel that reinforcement is covered with to surface, finally it is placed in structural member inner surface mold, inject resin, cooling and solidifying, extraction metal central spindle obtains hollow braided fiber enhancing structure part with holes after heating eliminates internal wax or high molecular polymer.Many advantages, such as present invention has manufacturing process simple, drilling Parameter adjustable, one-pass molding, intensity is high.
Description
[technical field]
The present invention relates to a kind of method for drilling, and in particular to a kind of lossless integrated drilling of woven composite hollow member
Method belongs to composite material machining machine technical field.
[background technique]
With the fast development of high-performance dynamoelectric equipment, the composite pipe with high specific strength, low inertia is obtained
Increasingly extensive application, overall performance can design, and be easy to the manufacture of global shape synchronous forming, be widely used in aviation boat
It, the component in the fields such as vehicle, be commonly used to manufacture core load-carrying member.
But in mechanical structure, it usually needs punched on this kind of pipe fitting, pipe fitting is assembled into mesh by being mechanically connected
Mark frame.In common machining process, carried out usually using the high-speed steel or hard alloy cutter of common fluted drill compound
The drilling of material one-way tape, drilling mode at least need four procedures to complete, i.e. hole, Ci Zhongfang are finish reamed in drilling-reaming-is slightly reamed-
Not only production efficiency is low for method, but also there are problems: if drilling quality is unstable, drilling will appear splitting and shrinkage cavity,
Resulting scrappage is up to 30% or more.
Meanwhile carbon fibre reinforced composite is mainly the mixing shape being mutually made of fibre reinforced phase and resin matrix
State, is macroscopically presented apparent anisotropy and stack features, and interfacial bonding strength is far below other directions.When drilling due to
The effect of entrance and exit position constraint is weak, and apex point easily generates biggish axial force, opens several layer materials of outermost, generates layering
Damage, and because can not cut staple lead to fiber bending, cause tearing and burr equivalent damage.In addition, the superiority of composite material
Can be provided by continuous fiber, however machine drilling needs cut staple, easily damages the integraty of fibrous material, causes intensity
Decline easily aggravates tool wear, causes cutting edge not sharp, it is difficult to cut staple, pole moreover, because fibre reinforced is mutually extremely hard
Easily cause serious outlet and entrance burr.
Therefore, in order to solve the above technical problems, it is necessory to a kind of woven composite hollow member that innovation is provided without
Integrated method for drilling is damaged, to overcome the defect in the prior art.
[summary of the invention]
In order to solve the above technical problems, it is an object of the invention to a kind of lossless integrations of woven composite hollow member
Method for drilling, manufacturing process is simple, drilling Parameter adjustable, one-pass molding, and intensity is high.
To achieve the above object, the technical scheme adopted by the invention is as follows: a kind of woven composite hollow member lossless one
Body method for drilling comprising following processing step:
(1) according to the geometrical feature of the composite material structural member of required preparation, design the metal central spindle that can freely extract with
And core shaft die；
(2) it according to the requirement of the position of composite material structural member drilling and geometry, is designed on core shaft die full
Sufficient position, direction and quantitative requirement and size are slightly larger than the embedded hole of drilling；According to the shape need of drilling, design can freely be put
Enter embedded hole and the shape control plug with core shaft die in interference fit, various shapes are made by more reshaping control plug inner surface configuration
Aperture；
(3) metal central spindle is put into core shaft die, and injects the wax under molten condition, stand cooling；
(4) the composite core axis is clamped on the drawing mechanism of 3 D weaving device and carries out 3 D weaving, obtained to surface and cover
There is the braiding mandrel of reinforcement；
(5) promotor and curing agent that doses are added in modified unsaturated polyester resin, stir evenly and stand
It waits without obvious bubble；
(6) prepare structural member inner surface mold, coat demoulding cream, merging braiding mandrel, closed die simultaneously examines mold
The resin modulated is injected after air-tightness, is then solidified；
(7) cured composite material structural member is placed in hot tank and is heated, flow out wax liquorization, extracted metal central spindle out, obtain
To hollow braided fiber enhancing structure part with holes.
The lossless integrated method for drilling of woven composite hollow member of the invention is further are as follows: described in step (1)
Metal central spindle is cylindrical central spindle.
The lossless integrated method for drilling of woven composite hollow member of the invention is further are as follows: in step (3), stands
The cooling time is 1-2 hours.
The lossless integrated method for drilling of woven composite hollow member of the invention is further are as follows: in step (3), uses
Wax injector injects the wax under molten condition；And the core shaft die is connected to a returnable.
The lossless integrated method for drilling of woven composite hollow member of the invention is further are as follows: described in step (5)
Promotor main component is cobalt iso-octoate, and curing agent main component is methyl ethyl ketone peroxide, resin: promotor: curing agent ratio
For 100:1:2.
The lossless integrated method for drilling of woven composite hollow member of the invention is further are as follows: in step (6),
Solidify 16-24h at a temperature of 10-30 DEG C.
The lossless integrated method for drilling of woven composite hollow member of the invention is further are as follows: table in the structural member
A resin barrel and a recycling bin are connected separately on face mould tool；In step (6), the recycling bin is connected to a vacuum pump.
The lossless integrated method for drilling of woven composite hollow member of the invention is also are as follows: in step (7), heater temperature
It is 80 DEG C, heats 30min；Wax liquor recycling box is provided in the hot tank.
Compared with prior art, the invention has the following beneficial effects: woven composite hollow member of the invention without
It is simple to damage integrated method for drilling manufacturing process, drilling Parameter adjustable, one-pass molding, intensity height；It uses knitting skill, enhancing
Body is interleaved according to specific structure, and achievable seamless connection substantially increases the intensity of structural member；Hole is natural in braiding
It generates, the integrality of structural member will not be destroyed because of stage property cut staple, intensity is high；In addition, wax is not used alone in the design
Or high molecular material is as mandrel, but substantially increased in such a way that metal central spindle and wax are compound as compound mandrel
Intensity of the compound mandrel when weaving on 3 D weaving device is conducive to the systematicness and integrality of protection braiding shape.This hair
The bright integraty for overcoming tradition machinery drilling and being easy to destruction braided fiber composite material, causes fibrous fracture, integral strength
Decline, and since anisotropic feature is presented in fibrous composite, burr, tearing and interlayer are easy to appear in boring procedure
The problems such as separation.
[Detailed description of the invention]
Fig. 1 (a) is the schematic diagram of core shaft die upper mold.
Fig. 1 (b) is the schematic diagram of core shaft die lower die.
Fig. 2 (a) is the schematic diagram of rectangular shape control plug.
Fig. 2 (b) is the schematic diagram of round shape control plug.
Fig. 2 (c) is the schematic diagram of oval shape control plug.
Fig. 3 (a) is the schematic diagram for coating wax-pattern in metal central spindle and being used to make mandrel.
Fig. 3 (b) is the schematic diagram of the compound mandrel of surface propolizing.
Fig. 4 is the schematic diagram that reinforcement braiding is carried out on mandrel.
Fig. 5 is the schematic diagram of the braiding mandrel after braiding is completed.
Fig. 6 is the schematic diagram of the generation of woven composite materials and structures part.
Fig. 7 is the schematic diagram of composite material structural member demoulding.
Fig. 8 is the schematic diagram of hollow composite material structural member with holes.
[specific embodiment]
It please refers to shown in Figure of description 1 to attached drawing 8, the present invention is a kind of lossless one of woven composite hollow member
Change method for drilling comprising following processing step:
(1) according to the geometrical feature of the composite material structural member of required preparation, the metal central spindle (one that can freely extract is designed
As be cylindrical central spindle) and core shaft die (such as Fig. 1 (a) and (b)).
(2) in order to improve drilling modulability, drilling Parameter adjustable, including hole shape, pore size, according to composite structure
The position of part drilling and the requirement of geometry, design meets position, direction and quantitative requirement and size on core shaft die
Embedded hole 1(slightly larger than drilling is generally size slightly larger than the maximum sized circular hole of required aperture)；It is wanted according to the shape of drilling
It asks, design can freely be put into embedded hole and the shape control plug (such as Fig. 2 (a) and (b), (c)) with core shaft die in interference fit, pass through
Shape control plug is adjusted to achieve the purpose that change drilling shape.
(3) metal central spindle 3 is placed in core shaft die 2, and injects the wax under molten condition or other high molecular polymers
(such as Fig. 3 (a), 3(b)), the wax of 12 hours cooling, to prepare needed for being covered with metal shaft wicking surface structural member shape is stood, and
There are the raised structures of corresponding shape control plug inner surface configuration in pre-buried hole site, which is gradually reduced from the bottom up, can
It effectively prevent braided fabric to be wrapped in protrusion, to obtain compound mandrel (such as Fig. 4)；Wherein, molten is injected using wax injector 5
Wax under state；And the core shaft die 2 is connected to a returnable 4.
(4) the composite core axis is clamped on the drawing mechanism of 3 D weaving device (such as Fig. 4), which can be according to specific
The movement velocity of the requirement adjustment drawing mechanism of structural member is to change coverage density of the reinforcement on compound mandrel, enhancing structure
Part intensity obtains to surface and is covered with braiding mandrel 6(such as Fig. 5 of reinforcement).
(5) thickener and curing agent that doses are added in modified unsaturated polyester resin, stir evenly and stand
It waits without obvious bubble.The promotor main component is cobalt iso-octoate, and curing agent main component is methyl ethyl ketone peroxide, tree
Rouge: promotor: curing agent ratio is 100:1:2.
(6) prepare structural member inner surface mold 7, coat demoulding cream, merging braiding mandrel 6, closed die simultaneously examines mold
Air-tightness after inject the resin (such as Fig. 6) modulated, 10-30 DEG C at a temperature of solidify 16-24h.Wherein, the structural member
A resin barrel 8 and a recycling bin 9 are connected separately on inner surface mold 7；The recycling bin 9 is connected to a vacuum pump 10.
(7) cured composite material structural member 13 is placed in the hot tank 11 that temperature is 85 DEG C and heats about 30min(as schemed
7) it, flows out wax liquorization, extracts metal central spindle out, obtain hollow braided fiber enhancing structure part (such as Fig. 8) with holes.Wherein, institute
State the wax liquor recycling box 12 being provided in baking oven 11 for recycling wax liquor.
Above specific embodiment is only the preferred embodiment of this creation, all in this wound not to limit this creation
Any modification, equivalent substitution, improvement and etc. done within the spirit and principle of work, should be included in this creation protection scope it
It is interior.
Claims (9)
1. a kind of lossless integrated method for drilling of woven composite hollow member, it is characterised in that: comprise the technical steps that:
(1) according to the geometrical feature of the composite material structural member of required preparation, the metal central spindle that can freely extract and core are designed
Axle mould tool；
(2) according to the requirement of the position of composite material structural member drilling and geometry, design meets position on core shaft die
It sets, direction and quantitative requirement and size are slightly larger than the embedded hole of drilling；According to the shape need of drilling, design can freely be put into pre-
Buried via hole and with core shaft die in the shape control plug of interference fit, pass through more reshaping control plug inner surface configuration and make various shapes and open
Hole；
(3) metal central spindle is put into core shaft die, and injects the wax under molten condition, stood cooling, obtain compound mandrel；
(4) the composite core axis is clamped on the drawing mechanism of 3 D weaving device and carries out 3 D weaving, obtained to surface and be covered with increasing
The braiding mandrel of strong body；
(5) thickener and curing agent that doses are added in modified unsaturated polyester resin, stir evenly and stand waiting
Without obvious bubble；
(6) prepare structural member inner surface mold, coat demoulding cream, merging braiding mandrel, closed die simultaneously examines the airtight of mold
The resin modulated is injected after property, is then solidified；
(7) cured composite material structural member is placed in hot tank and is heated, flow out wax liquorization, extracted metal central spindle out, obtain
The braided fiber enhancing structure part in blanking bar hole.
2. the lossless integrated method for drilling of woven composite hollow member as described in claim 1, it is characterised in that: step
(1) in, the metal central spindle is the central spindle for meeting structural member shape convenient for extraction.
3. the lossless integrated method for drilling of woven composite hollow member as described in claim 1, it is characterised in that: step
(2) in, shape control plug can freely change inner surface configuration, and the structural member of different hole shapes is freely designed by replacing shape control plug.
4. the lossless integrated method for drilling of woven composite hollow member as described in claim 1, it is characterised in that: step
(3) in, standing the cooling time is 1-2 hours.
5. the lossless integrated method for drilling of woven composite hollow member as described in claim 1, it is characterised in that: step
(3) in, the wax under molten condition is injected using wax injector；And the core shaft die is connected to a returnable.
6. woven composite hollow member lossless integrated method for drilling as described in claim 1 in step (5), also wraps
The promotor that main component is cobalt iso-octoate is included, curing agent main component is methyl ethyl ketone peroxide, resin: promotor: curing agent
Ratio is 100:1:2.
7. the lossless integrated method for drilling of woven composite hollow member as described in claim 1, it is characterised in that: step
(6) in, 10-30 DEG C at a temperature of solidify 16-24h.
8. the lossless integrated method for drilling of woven composite hollow member as claimed in claim 6, it is characterised in that: described
A resin barrel and a recycling bin are connected separately on structural member inner surface mold；In step (6), it is true that the recycling bin is connected to one
Sky pump.
9. the lossless integrated method for drilling of woven composite hollow member as described in claim 1, it is characterised in that: step
(7) in, heater temperature is 80 DEG C, heats 30min；Wax liquor recycling box is provided in the hot tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710252590.0A CN107031072B (en) | 2017-04-18 | 2017-04-18 | A kind of lossless integrated method for drilling of woven composite hollow member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710252590.0A CN107031072B (en) | 2017-04-18 | 2017-04-18 | A kind of lossless integrated method for drilling of woven composite hollow member |
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| Publication Number | Publication Date |
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| CN107031072A CN107031072A (en) | 2017-08-11 |
| CN107031072B true CN107031072B (en) | 2019-07-26 |
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| CN113146960B (en) * | 2021-06-09 | 2023-07-07 | 北京软体机器人科技股份有限公司 | Manufacturing die and manufacturing method of internal support type air bag type flexible clamp |
| CN113733614B (en) * | 2021-08-03 | 2023-05-02 | 浙江理工大学 | Manufacturing method of woven composite pipe fitting with variable stiffness characteristic |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201406531A (en) * | 2012-08-09 | 2014-02-16 | Tektro Technology Corp | Manufacturing method of hollow carbon fiber formed product and forming mold thereof |
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- 2017-04-18 CN CN201710252590.0A patent/CN107031072B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201406531A (en) * | 2012-08-09 | 2014-02-16 | Tektro Technology Corp | Manufacturing method of hollow carbon fiber formed product and forming mold thereof |
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