CN109571976A - Method for welding the thermoplastic composite component of continuous fiber reinforcement - Google Patents
Method for welding the thermoplastic composite component of continuous fiber reinforcement Download PDFInfo
- Publication number
- CN109571976A CN109571976A CN201710898174.8A CN201710898174A CN109571976A CN 109571976 A CN109571976 A CN 109571976A CN 201710898174 A CN201710898174 A CN 201710898174A CN 109571976 A CN109571976 A CN 109571976A
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- China
- Prior art keywords
- thermoplastic composite
- connector
- alternating current
- current impression
- magnetic field
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- 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.)
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Classifications
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
- B29C65/32—Induction
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of methods for welding the thermoplastic composite component of continuous fiber reinforcement, comprising: cleaning (101), wherein cleaning the surface (10,20) to be connected of the thermoplastic composite component；It provides step (102), wherein connector (30) are arranged between the surface (10,20) to be connected；Fixing step (103), wherein the connector (30), the surface (10,20) to be connected are fixed relative to each other；Induction heating step (104), wherein applying ac magnetic field to the connector (30) fixed relative to the surface (10,20) to be connected with induction heating；And step (105) are terminated, apply the ac magnetic field wherein gradually weakening and being finally stopped to the connector (30).In accordance with the invention it is possible to junction with high intensity while be also able to maintain higher toughness and manufacture the more complicated big thickness of configuration, have crystalline thermoplastic composite component.
Description
Technical field
The present invention relates to a kind of method for welding the thermoplastic composite component of continuous fiber reinforcement, the components
The welding of component especially for being made of the thermoplastic composite with crystalline continuous fiber reinforcement, the welding
Especially induction welding.
Background technique
In aircraft manufacturing field, commonly using the component being made of the thermoplastic composite of continuous fiber reinforcement,
Middle continuous fiber is commonly referred to as continuous carbon fiber, glass fibre, aramid fiber etc., and thermoplastic composite is usually for example
For polyether-ether-ketone, polyphenylene sulfide, polyether ketone ketone, nylon, polyester resin etc..Compared with traditional same with thermosetting compound material, Gao Xing
The thermoplastic composite of energy continuous fiber reinforcement is due to toughness with higher, damage tolerance, operation at high temperature and processing week
The advantages that phase is shorter shows its exclusive superiority when being applied to aircraft manufacturing field.Nevertheless, by configuration institute
Limit, the geometry of the thermoplastic member of the prior art production group often relatively simple therefore these configurations are relatively simple
It is thermoplastic composite indispensable process in the fabrication process that part, which connects,.
In metal and same with thermosetting compound material component manufacturing process, common connection method be by fastener connection or
It is glued by adhesive, both methods is also applicable in thermoplastic composite, but it is not optimal connection type.
It is connected using fastener, is easy to generate stress concentration in junction, is easy to appear stress rupture after long-time use and leads to structure
Part damage leads to component integral strength so that moisture or other impurities are easy to penetrate into the material internal of component in junction
Decline.In addition, being also easy to the effects such as electrochemical corrosion occur because of the introducing of metal fastenings.Adhesive is glued to use
When there is also more difficulties: firstly, needing to carry out connected surface complicated surface treatment before connection, and the surface needs
It is stored in the operation room of controlled environment；Secondly, the polarity of used adhesive polymer (usually epoxy resin) is stronger,
And thermoplastic composite is all the weaker resin of polarity, the compatibility of the two is poor；Furthermore the solidification of epoxy resin adhesive
Period is longer, generally requires several hours time, which also needs to carry out in autoclave, therefore considerably increases
Manufacturing cost and efficiency is lower.
Due to the material matrix of thermoplastic composite component be it is fusible, can be in junction by two interfaces
Composite material sufficiently melts, and applies certain pressure, can reach the effect being connected after cooling.Due to the composite wood at two interfaces
Material is identical material, so consistency problem is not present after solidifying again.This connection method is known as " thermoplastic composite material
The welding of material ".
The many because being known as of the welding performance with crystalline thermoplastic material are influenced, one of the keys is interface
Again the process solidified.For with crystalline material matrix, crystallinity has important influence to material matrix intensity, crystallize
Degree is higher, single spherocrystal is bigger, and intensity is also bigger, but toughness can also reduce simultaneously, therefore the intensity to improve crystal region, then
It improves the crystallinity of matrix, increase single crystalline region.Increase the most-often used method of crystal region intensity first is that when increasing crystallization
Between.
Summary of the invention
It is not easy to use traditional adhesive or tight it is an object of the present invention to be directed to thermoplastic composite in the prior art
The problem of the methods of firmware connects provides the novel thermoplastic composite component for welding continuous fiber reinforcement of one kind
Method can control crystallisation by cooling speed, complete attended operation.Component weight can not increased according to the method for the present invention
Measure, be not likely to produce interfacial failure hidden danger in the case where make to obtain high-crystallinity in the material of junction to realize high-intensitive company
It connects.
It according to the present invention, according to the method for the present invention include: cleaning in order to realize this purpose, wherein cleaning thermoplastic
The surface to be connected of property composite element；Step is provided, wherein connector is arranged between surface to be connected；Fixed step
Suddenly, wherein connector, surface to be connected are fixed relative to each other；Induction heating step, wherein to relative to be connected
The fixed connector in surface applies ac magnetic field with induction heating；And step is terminated, wherein gradually weakening and being finally stopped
Apply ac magnetic field to connector.
According to the preferred embodiment of the present invention, connector includes the thermoplastic for the two sides for being located in the middle net and being applied to net
Film, identical as the material of thermoplastic composite component or both the chemical physical property of the material of thermoplastic film is more similar, and net
It is made of metal or carbon fiber, wherein metal is one or more of copper, silver, iron, aluminium.
According to the preferred embodiment of the present invention, ac magnetic field is applied to connector by alternating current impression coil, so that
Net is inductively heated so that thermoplastic film and the material molten on surface to be connected, wherein by alternating current impression coil to connection
Part apply ac magnetic field be it is variable, wherein the range of the voltage of alternating current impression coil be 0V to 380V, frequency 50Hz,
Wherein the frequency of alternating current impression coil can be adjusted by frequency conversion cabinet, and the time for applying ac magnetic field is, for example, 1 second to 1
Minute.By the effect of the coil-induced heating of alternating current impression by distance of reaction, the factors such as ac frequency and corresponding sensing area
Influence: distance of reaction is smaller, frequency is higher, corresponding sensing area is bigger, and the effect of induction heating is higher；Otherwise it is lower.In root
According in method of the invention, can according to need using the relay of write-in program come the voltage of On-line Control induction coil, from
And can control the warming and cooling rate of junction, it realizes crystallization process, the i.e. slower crystallization process of temperature programmed control, is thus easy
Big spherocrystal is formed, the matrix strength of the material in junction can also eliminate stress while rising.
According to the preferred embodiment of the present invention, multiple alternating current impression coils are equipped with, plurality of alternating current impression coil exists
It is arranged to "-" type in one plane and the voltage of multiple alternating current impression coils is different, and wherein thermoplastic composite structure
It is mobile to pass through the ac magnetic field applied by alternating current impression coil relative to alternating current impression coil that part is parallel to the plane.
According to the preferred embodiment of the present invention, continuous fiber is carbon fiber, glass fibre, aramid fiber, and thermoplasticity is multiple
Condensation material is the resin with crystallinity or hemicrystalline, wherein resin be polyphenylene sulfide, polyether-ether-ketone, polyether ketone ketone, nylon,
Polypropylene, polyester resin.
According to the preferred embodiment of the present invention, thermoplastic composite component is tabular component, thermoplastic composite
With a thickness of 1mm to 30mm.
According to the preferred embodiment of the present invention, in the fixed step of assembling, apply fixed pressure in link position,
Wherein the pressure is 0.1MPa -1MPa and keeps being down to room temperature to connected position.Preferably, it is continuously applied by roller
The pressure or the pressure fixed by vacuum bag processed application being fixed.
By can also be able to maintain higher toughness while junction has high-intensitive according to the method for the present invention, and
And be suitably adapted for according to the method for the present invention manufacture the more complicated big thickness of configuration, have crystalline thermoplastic composite material
Expect component.In addition, being connected when connecting the thermoplastic composite component of continuous fiber reinforcement using the method that this patent provides
Interface is not in incompatible appearance, and bonding strength is high and tough is good, and whole operation process may be implemented to automate
It produces and is heated without others, pressurized equipment, cost is easily controllable.
Detailed description of the invention
Advantageous embodiment according to the present invention is shown in the attached drawings.In the accompanying drawings:
Fig. 1 shows according to the present invention for welding the method for the thermoplastic composite component of continuous fiber reinforcement
Schematic flow chart；
Fig. 2 shows thermoplastic composite components and connector to be connected according to the present invention；
Fig. 3 shows a kind of embodiment for carrying out induction heating to junction according to the method for the present invention, is provided with
One alternating current impression coil；And
Fig. 4 shows another embodiment for carrying out induction heating to junction according to the method for the present invention, is provided with
Five alternating current impression coils.
Specific embodiment
It is described in detail next, with reference to attached drawing according to the present invention for welding the thermoplastic composite material of continuous fiber reinforcement
Expect the specific embodiment of the method for component.Forth below is only this field according to the preferred embodiment of the present invention
Technical staff can expect can be realized other modes of the invention, its described other party on the basis of the preferred embodiment
Formula is equally fallen within the scope of the present invention.
The directional terminology, such as "front", "rear", "left", "right", "upper", "lower" etc. of middle appearance described in detail below are phases
For the direction shown in the attached drawing.
Referring to FIG. 1, FIG. 2 and FIG. 3, according to the present invention for welding the thermoplastic composite component of continuous fiber reinforcement
Method include: cleaning 101, wherein cleaning thermoplastic composite component surface 10 and 20 to be connected；Step is provided
Rapid 102, wherein connector 30 is arranged between surface 10,20 to be connected；Fixing step 103, wherein by connector 30, to even
The surface 10,20 connect is fixed relative to each other；Induction heating step 104, wherein to fixed relative to surface 10,20 to be connected
Connector 30 apply ac magnetic field with induction heating；And step 105 is terminated, wherein gradually weakening and being finally stopped to even
Fitting 30 applies ac magnetic field.
In cleaning 101, the detergent of such as ethyl alcohol, isopropanol can be used to wipe thermoplastic composite structure
The surface 10 and 20 to be connected of part is subsequently dried surface with dust and the grease etc. for removing surface 10 and 20.Thermoplastic composite
Material members can be tabular component, such as laminate, and the thickness with 1mm to 30mm.
In providing step 102, provided connector 30 may include being located in the middle net and being applied to the net
The thermoplastic film of two sides, wherein identical as the material of the thermoplastic composite component or both the Chemical Physics of the material of thermoplastic film
Property is more similar and can be with melted by heating.Particularly, the thermoplastic composite that continuous fiber is reinforced is with crystallinity
Or the resin of hemicrystalline, such as polyphenylene sulfide, polyether-ether-ketone, polyether ketone ketone, nylon, polypropylene, polyester resin, wherein continuously
Fiber is carbon fiber, glass fibre, aramid fiber.And the net of connector 30 is made of metal or carbon fiber, wherein metal be copper,
One or more of silver, iron, aluminium.
In fixing step 103, in order to which connector 30 and surface 10,20 to be connected are fixed relative to each other, such as
It can be applied continuously in fixed pressure in the two sides on assembled connector 30 and surface 10,20 to be connected by roller,
Or fixed pressure is applied in its two sides by vacuum bag processed, which is, for example, 0.1MPa to 1MPa.Referring to Fig. 2, show
One embodiment of thermoplastic composite component and connector to be connected according to the present invention, wherein use having a size of
The polyphenylene sulfide laminate of 2500mm × 500mm × 3mm continuous carbon fibre enhancing waits connecting as component to be connected at it
The connector 30 that is made of the polyphenylene sulfide of metal copper mesh and its two sides of 10 paving of surface, size can be with structure to be connect
The size of part is relatively set, and the polyphenylene sulfide laminate of identical continuous carbon fibre enhancing is arranged again on connector 30, this
Vacuum bag (being not shown) for example is made based on said modules afterwards and vacuumizes to realize and said modules are applied with fixed pressure.
In induction heating step 104, it is inductively heated connector 30 by additional ac magnetic field, such as connecting
Eddy current is generated on metal mesh or carbon fibre fabric in part 30 to heat metal mesh or carbon fibre fabric, and then melts connection
The thermoplastic film of part 30 and the material on surface 10,20 to be connected.In the induction heating step 104, pass through alternating current impression coil
40 (diameter is, for example, 80mm) to the ac magnetic field that connector 30 applies be it is variable, in the initial stage of induction heating, hand over
The voltage for flowing induction coil 40 is higher quickly by thermoplastic film and the material molten on surface 10,20 to be connected, then gradually to drop
The voltage of low induction coil 40, until being zero, wherein the range of the voltage of alternating current impression coil 40 is, for example, 0V to 380V, its frequency
Rate is 50Hz, and the time for applying ac magnetic field is related with surface to be connect, such as can be 1 second to 1 minute.
Fig. 4 shows another preferred embodiment in induction heating step 104, is provided with multiple alternating current impression lines
Circle 40, wherein the multiple alternating current impression coil 40 arranges to "-" type in a plane and multiple alternating current impression coils 40
Voltage it is different, such as be from left to right respectively 380V, 300V, 240V, 180V, 120V in Fig. 4, wherein thermoplastic composite material
Material member parallel moves from left to right in the direction of arrow A in the plane of alternating current impression coil 40 relative to alternating current impression coil 40
Across the ac magnetic field applied by alternating current impression coil 40, wherein this relative movement can be thermoplastic composite component
Fixed and alternating current impression coil 40 is mobile, or on the contrary, the speed of relative movement is, for example, 5mm/s.
In terminating step 105, for the embodiment of single alternating current impression coil 40 shown in Fig. 3, friendship is gradually decreased
The voltage of induction coil 40 is flowed, until being zero, impressed pressure should be kept constant at this time, it, can when wait the place of melting, temperature is down to room temperature
Additional fixation pressure is removed, the thermoplastic composite component of the continuous fiber reinforcement connected.For shown in Fig. 4
The embodiment of multiple alternating current impression coils 40, the electromagnetism that it bears with the movement of thermoplastic composite component from left to right
Gradually weaken and finally disappear since the voltage of alternating current impression coil 40 is gradually reduced, hereafter continues to be kept fixed pressure one
The section time, such as 10 minutes, additional fixation pressure is then removed, the thermoplastic composite of the continuous fiber reinforcement connected
Material members.
By the above content, those skilled in the art will readily recognize that can be by the substitution of technical characteristic disclosed in this invention
Embodiment disclosed in this invention can be combined new to generate by technical characteristic as feasible alternate embodiments
Embodiment, they equally fall within the scope of the appended claims.
Claims (15)
1. a kind of method for welding the thermoplastic composite component of continuous fiber reinforcement, comprising:
Cleaning (101), wherein cleaning the surface (10,20) to be connected of the thermoplastic composite component；
It provides step (102), wherein connector (30) are arranged between the surface (10,20) to be connected；
Fixing step (103), wherein the connector (30), the surface (10,20) to be connected are fixed relative to each other；
Induction heating step (104), wherein applying to the connector (30) fixed relative to the surface (10,20) to be connected
Ac magnetic field is with induction heating；And
It terminates step (105), applies the ac magnetic field wherein gradually weakening and being finally stopped to the connector (30).
2. according to the method for claim 1, which is characterized in that the connector includes being located in the middle net and being applied to institute
State the thermoplastic film of the two sides of net.
3. according to the method for claim 2, which is characterized in that the material of the thermoplastic film and the thermoplastic composite
Identical or both the chemical physical property of the material of component is more similar.
4. according to method described in claim 2 or 3, which is characterized in that the net is made of metal or carbon fiber.
5. according to the method for claim 4, which is characterized in that the metal is one or more of copper, silver, iron, aluminium.
6. according to method described in claim 2 or 3, which is characterized in that applied by alternating current impression coil to the connector
Ac magnetic field, so that the net is inductively heated so that the thermoplastic film melts.
7. according to the method for claim 6, which is characterized in that the friendship applied by alternating current impression coil to the connector
Galvanic electricity magnetic field be it is variable, wherein the range of the voltage of alternating current impression coil be 0V to 380V, frequency 50Hz.
8. according to the method for claim 6, which is characterized in that multiple alternating current impression coils are equipped with, wherein the multiple friendship
Stream induction coil arranges to "-" type in a plane and the voltage of the multiple alternating current impression coil is different, and wherein
The thermoplastic composite member parallel is mobile to pass through by described relative to the alternating current impression coil in the plane
The ac magnetic field that alternating current impression coil applies.
9. according to method described in any one of preceding claims 1 to 3, which is characterized in that the continuous fiber be carbon fiber,
Glass fibre, aramid fiber.
10. according to method described in any one of preceding claims 1 to 3, which is characterized in that the thermoplastic composite is
Resin with crystallinity or hemicrystalline.
11. according to the method for claim 10, which is characterized in that the resin is polyphenylene sulfide, polyether-ether-ketone, polyether-ketone
Ketone, nylon, polypropylene, polyester resin.
12. according to method described in any one of preceding claims 1 to 3, which is characterized in that the thermoplastic composite structure
Part is tabular component.
13. according to method described in any one of preceding claims 1 to 3, which is characterized in that the thermoplastic composite
With a thickness of 1mm to 30mm.
14. according to method described in any one of preceding claims 1 to 3, which is characterized in that in the fixing step,
Link position applies fixed pressure.
15. according to the method for claim 14, which is characterized in that be applied continuously in fixed pressure by roller or pass through
Vacuum bag processed applies fixed pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898174.8A CN109571976A (en) | 2017-09-28 | 2017-09-28 | Method for welding the thermoplastic composite component of continuous fiber reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898174.8A CN109571976A (en) | 2017-09-28 | 2017-09-28 | Method for welding the thermoplastic composite component of continuous fiber reinforcement |
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| CN109571976A true CN109571976A (en) | 2019-04-05 |
Family
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| CN201710898174.8A Pending CN109571976A (en) | 2017-09-28 | 2017-09-28 | Method for welding the thermoplastic composite component of continuous fiber reinforcement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895474A (en) * | 2019-12-03 | 2021-06-04 | 中国商用飞机有限责任公司 | Method for connecting fiber reinforced thermoplastic composite material and metal |
| CN114103154A (en) * | 2021-11-30 | 2022-03-01 | 同济大学 | Manufacturing method of 3D printing fiber composite grid reinforced thermoplastic thin-wall structure |
| CN115003493A (en) * | 2019-11-27 | 2022-09-02 | 阿科玛法国公司 | Method for evaluating the assembly by welding of parts made of thermoplastic material |
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| CN114103154A (en) * | 2021-11-30 | 2022-03-01 | 同济大学 | Manufacturing method of 3D printing fiber composite grid reinforced thermoplastic thin-wall structure |
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