CN220562207U - Co-curing connection structure of thermoplastic composite material automobile bumper - Google Patents
Co-curing connection structure of thermoplastic composite material automobile bumper Download PDFInfo
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- CN220562207U CN220562207U CN202321833229.4U CN202321833229U CN220562207U CN 220562207 U CN220562207 U CN 220562207U CN 202321833229 U CN202321833229 U CN 202321833229U CN 220562207 U CN220562207 U CN 220562207U
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- shaped step
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- outer shell
- step connecting
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 18
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 17
- 239000004917 carbon fiber Substances 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004744 fabric Substances 0.000 claims abstract description 10
- 238000009941 weaving Methods 0.000 claims abstract description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 238000009954 braiding Methods 0.000 claims description 5
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920003253 poly(benzobisoxazole) Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920001643 poly(ether ketone) Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 description 14
- 229920005992 thermoplastic resin Polymers 0.000 description 13
- 238000009940 knitting Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 8
- 230000008595 infiltration Effects 0.000 description 7
- 238000001764 infiltration Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 229920006253 high performance fiber Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001095 light aluminium alloy Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Abstract
The utility model discloses a co-curing connecting structure of a thermoplastic composite material automobile bumper, which comprises an inner shell wedge-shaped step connecting structure and an outer shell wedge-shaped step connecting structure, wherein the step connecting structures of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure are matched to form a connecting interface; the connecting interfaces of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure are respectively provided with a reinforcing layer, and the reinforcing layers comprise a fiber multi-dimensional weaving reinforcing structure and a first resin matrix; the bodies of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure comprise carbon fiber plane fabric laminated reinforcing structures and second resin matrixes. The inner shell and the outer shell adopt wedge-shaped step-type matched connection structures, so that the mechanical bonding strength of the shell connection interface can be effectively improved.
Description
Technical Field
The utility model relates to a connection molding mode of a thermoplastic composite material workpiece, in particular to a co-curing connection structure of a thermoplastic composite material automobile bumper.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The bumper is a key protection device for preventing external impact and protecting front and rear safety of a vehicle body in the transportation process of the vehicle. With the continuous penetration of the design concept of automobile weight reduction, the design requirements for the weight reduction and impact resistance of automobile bumpers become important and hot points of research and designers. The traditional automobile bumper is prepared from the light aluminum alloy, the density of the traditional metal is high, the rigidity is unstable, along with the continuous application of novel high-performance fiber reinforced resin matrix composite materials in structural parts and impact-resistant parts, light weight impact-resistant products of the novel high-performance fiber reinforced resin matrix composite materials continuously emerge, and the trend also provides a brand new direction of material selection for the design of automobile bumper products. Wherein the thermoplastic resin-based fiber reinforced composite material is naturally also an advantageous substitute material for the conventional metal material due to its excellent impact resistance.
Besides the requirements of material design, the traditional bumper products are connected with automobiles and the assembly of material parts is generally carried out by adopting a mechanical bolt or rivet connection mode, which inevitably leads to stress concentration at the connection part and fatigue damage in the service process.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a co-curing connecting structure of a thermoplastic composite material automobile bumper.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
a co-curing connection structure of a thermoplastic composite material automobile bumper comprises an inner shell wedge-shaped step connection structure and an outer shell wedge-shaped step connection structure, wherein the step connection structures of the inner shell wedge-shaped step connection structure and the outer shell wedge-shaped step connection structure are matched to form a connection interface;
the connecting interfaces of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure are respectively provided with a reinforcing layer, and the reinforcing layers comprise a fiber multi-dimensional weaving reinforcing structure and a first resin matrix;
the bodies of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure comprise carbon fiber plane fabric laminated reinforcing structures and second resin matrixes.
The reinforcing structure of the reinforcing layer is a hybrid fiber multidimensional weaving reinforcing structure, and when the inner and outer shells are formed by infiltration connection, the reinforcing layer has good mechanical properties so as to ensure the connection strength between the inner and outer shells.
The wedge-shaped step connecting structure of the inner shell and the outer shell adopts a planar fabric laminated reinforcing structure, so that the thinner inner shell and the thinner outer shell can be conveniently reinforced.
The inner shell and the outer shell are connected by adopting a step connection structure, so that the contact area between the inner shell and the outer shell can be effectively increased, and the connection strength between the inner shell and the outer shell is further improved.
In some embodiments, the thickness of the strengthening layer is 0.5-1mm.
Preferably, the reinforcement layer is formed by three-dimensional weaving of carbon fibers and hybrid fibers, wherein the hybrid fibers are selected from aramid fibers, nylon fibers, PBO fibers or glass fibers.
In some embodiments, the carbon fibers of the carbon fiber planar fabric laminate reinforcing structure are selected from T300, T700, T800, or T1000.
In some embodiments, the resin of the second resin matrix is selected from polypropylene, polyethylene, polyamide, polyphenylene sulfide, polyetherketone, polyetheretherketone, or polyurethane.
In some embodiments, the number of step sets of the inner housing wedge step connection and the outer housing wedge step connection is 4-10 sets.
Preferably, the transition length of the single set of steps is 20-60mm.
In some embodiments, the fiber lay-up arrangement of the inner shell wedge step connection and the outer shell wedge step connection is in a bias ply manner.
Preferably, the fiber lay-up arrangement of the inner shell wedge-shaped step connection structure and the outer shell wedge-shaped step connection structure is selected from one or a combination of + -30 DEG, + -45 DEG, + -60 DEG, 0 DEG/+ -30 DEG, 0 DEG/+ -45 DEG, 0 DEG/+ -60 deg.
Wherein 0 °/±30° is meant to include 0 ° and ±30°;0 °/±45° is meant to include 0 ° and ±45°;0 °/±60° is meant to include 0 ° and ±60°.
In some embodiments, the weave structure of the hybrid fiber multi-dimensional weave reinforcement structure is selected from three-dimensional four-way, three-dimensional five-way, three-dimensional six-way, or three-dimensional seven-way.
The beneficial effects achieved by one or more embodiments of the present utility model described above are as follows:
the inner shell and the outer shell adopt wedge-shaped step-type matched connection structures, so that the mechanical bonding strength of the shell connection interface can be effectively improved.
The contact interface of the step-type matching connection structure adopts a three-dimensional multidimensional woven interface reinforcing layer, so that the combination toughness and the impact resistance of interface connection are effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic structural view of a co-cured connecting structure of a thermoplastic composite automotive bumper according to an embodiment of the present utility model.
1, a wedge-shaped step structure of an inner shell; 2. the inner shell is connected with the interface multidimensional braiding reinforcement layer; 3. a wedge-shaped step structure of the outer shell; 4. the shell body is connected with the interface multi-dimensional braiding reinforcement layer.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
The utility model is further illustrated below with reference to examples.
Example 1
As shown in fig. 1, a co-cured interfacing structure of an automobile bumper of a carbon fiber reinforced thermoplastic resin matrix composite material specifically includes: the multi-dimensional mixed fiber woven reinforcement layer comprises an inner shell wedge-shaped step structure 1, an outer shell wedge-shaped step structure 3 and a connecting interface. Wherein, the wedge-shaped step structures of the inner and outer shells are respectively formed by overlapping and layering prepreg cloth of T300 unidirectional carbon fiber reinforced polypropylene thermoplastic resin with 40 percent of content, wherein the inner and outer shells are respectively designed by adopting a wedge-shaped step structure with single group thickness of 2mm and group number of 4 groups, and the transition length of the single group of steps is 40mm. The wedge-shaped step structure of the inner shell and the outer shell adopts a hybrid oblique superposition mode of +/-30 degrees and +/-45 degrees, the inner shell and the outer shell which are designed and designed by layering configuration complete infiltration compounding of thermoplastic resin under the continuous pressure and pressurization treatment of 2MPa through the heating temperature of 190 ℃, and the whole hot pressing heat preservation time is 60 minutes.
Laying a mixed fiber multi-dimensional woven reinforcing layer with the thickness of 0.5mm on the contact surfaces of the inner shell and the outer shell, wherein the reinforcing layer adopts a mixed proportion of 5:1, the T300 carbon fiber is mixed with the three-dimensional four-way knitting structure of the aramid fiber, the resin of the contact surface knitting strengthening layer adopts polypropylene, and the final resin content is 40 percent.
And paving the surface knitting reinforcement layers on the wedge-shaped step contact surfaces of the inner shell and the outer shell which are respectively subjected to infiltration curing molding, placing the combined structure in a specific molding die, and continuously performing pressure molding under the action of 4MPa for 60 minutes at the heating temperature of 190 ℃.
Example 2
The co-curing interface connection structure of the automobile bumper of the carbon fiber reinforced thermoplastic resin matrix composite material specifically comprises: the multi-dimensional mixed fiber woven reinforcement layer comprises an inner shell wedge-shaped step structure, an outer shell wedge-shaped step structure and a connecting interface. The wedge-shaped step structures of the inner shell and the outer shell are respectively formed by overlapping and layering prepreg cloth of polyamide thermoplastic resin with the content of 60% reinforced by T700 unidirectional carbon fibers, wherein the inner shell and the outer shell are respectively designed by adopting a wedge-shaped step structure with the thickness of 3mm and the number of 6 groups, and the transition length of the single group of steps is 60mm. The wedge-shaped step structure of the inner shell and the outer shell adopts a 0 degree/+/-45 degree and 0 degree/+/-60 degree hybrid oblique superposition mode, the inner shell and the outer shell which are designed and designed by layering configuration complete infiltration compounding of thermoplastic resin under the continuous pressure and pressurization treatment of 7MPa through the heating temperature of 250 ℃, and the whole hot pressing heat preservation time is 60 minutes.
Lay the multi-dimensional weaving reinforcement layer of mixed fiber that the thickness is 1mm at inside and outside casing contact surface, this reinforcement layer adopts mixing proportion to be 2:1, the T700 carbon fiber mixed nylon fiber three-dimensional seven-direction knitting structure adopts polyamide as resin for the contact surface knitting strengthening layer, and the final resin content is 60%.
And paving the surface knitting reinforcement layers on the wedge-shaped step contact surfaces of the inner shell and the outer shell which are respectively infiltrated and solidified, placing the combined structure in a specific forming die, and continuously forming under the pressure of 2MPa for 60 minutes at the heating temperature of 260 ℃.
Example 3
The co-curing interface connection structure of the automobile bumper of the carbon fiber reinforced thermoplastic resin matrix composite material specifically comprises: the multi-dimensional mixed fiber woven reinforcement layer comprises an inner shell wedge-shaped step structure, an outer shell wedge-shaped step structure and a connecting interface. The wedge-shaped step structures of the inner and outer shells are respectively formed by overlapping and layering prepreg cloth of T800 unidirectional carbon fiber reinforced polyether-ether-ketone thermoplastic resin with 50 percent of content, wherein the inner and outer shells are designed by adopting a single-group wedge-shaped step structure with the thickness of 2mm and the number of 4-10 groups, and the transition length of the single-group step is 30mm. The wedge-shaped step structure of the inner shell and the outer shell adopts a 0 degree/+/-30 degree and 0 degree/+/-45 degree hybrid oblique superposition mode, the inner shell and the outer shell which are designed and designed by layering configuration complete infiltration compounding of thermoplastic resin under the continuous pressure and pressurization treatment of 6MPa through the heating temperature of 290 ℃, and the whole hot pressing heat preservation time is 120 minutes.
Laying a hybrid fiber multi-dimensional woven reinforcing layer with the thickness of 0.8mm on the contact surfaces of the inner shell and the outer shell, wherein the reinforcing layer adopts a hybrid proportion of 1:1, T1000 carbon fiber is mixed with a three-dimensional five-way knitting structure of high-strength glass fiber, polyether-ether-ketone is adopted as resin for contacting with a surface knitting reinforcing layer, and the final resin content is 50%.
And paving the surface knitting reinforcement layers on the wedge-shaped step contact surfaces of the inner shell and the outer shell which are respectively infiltrated and solidified, placing the combined structure in a specific forming die, and continuously forming under the pressure of 9MPa for 60 minutes at the heating temperature of 290 ℃.
Example 4
The co-curing interface connection structure of the automobile bumper of the carbon fiber reinforced thermoplastic resin matrix composite material specifically comprises: the multi-dimensional mixed fiber woven reinforcement layer comprises an inner shell wedge-shaped step structure, an outer shell wedge-shaped step structure and a connecting interface. The wedge-shaped step structures of the inner and outer shells are respectively formed by overlapping and layering prepreg cloth of polyphenylene sulfide thermoplastic resin with the content of 60% reinforced by T1000 unidirectional carbon fibers, wherein the inner and outer shells are designed by adopting a single-group wedge-shaped step structure with the thickness of 2.5mm and the number of 8 groups, and the transition length of the single-group step is 55mm. The wedge-shaped step structure of the inner shell and the outer shell adopts a 0 degree/+/-30 degree and 0 degree/+/-60 degree hybrid oblique superposition mode, the inner shell and the outer shell which are designed and designed by layering configuration complete infiltration compounding of thermoplastic resin under the continuous pressure and pressurization treatment of 4MPa through the heating temperature of 310 ℃, and the whole hot pressing heat preservation time is 65 minutes.
Laying a mixed fiber multi-dimensional woven reinforcing layer with the thickness of 0.8mm on the contact surfaces of the inner shell and the outer shell, wherein the reinforcing layer adopts a mixed proportion of 4:1, T800 carbon fiber is mixed with a three-dimensional six-way knitting structure of PBO fiber, polyphenylene sulfide is adopted as resin for contacting with the surface knitting strengthening layer, and the final resin content is 55%.
And paving the surface knitting reinforcement layers on the wedge-shaped step contact surfaces of the inner shell and the outer shell which are respectively subjected to infiltration curing molding, placing the combined structure in a specific molding die, and continuously performing pressure molding under the action of 9MPa for 60 minutes at the heating temperature of 310 ℃.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides a thermoplastic composite car bumper's co-curing connection structure which characterized in that: the device comprises an inner shell wedge-shaped step connecting structure and an outer shell wedge-shaped step connecting structure, wherein the step connecting structures of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure are matched to form a connecting interface;
the connecting interfaces of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure are respectively provided with a reinforcing layer, and the reinforcing layers comprise a fiber multi-dimensional weaving reinforcing structure and a first resin matrix;
the bodies of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure comprise carbon fiber plane fabric laminated reinforcing structures and second resin matrixes.
2. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the thickness of the reinforcing layer is 0.5-1mm.
3. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the reinforcing layer is formed by three-dimensional braiding of carbon fibers and hybrid fibers, wherein the hybrid fibers are selected from aramid fibers, nylon fibers, PBO fibers or glass fibers.
4. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the carbon fibers of the carbon fiber plane fabric laminated reinforcing structure are selected from T300, T700, T800 or T1000.
5. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the resin of the second resin matrix is selected from polypropylene, polyethylene, polyamide, polyphenylene sulfide, polyether ketone, polyether ether ketone or polyurethane.
6. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the number of the step groups of the wedge-shaped step connecting structure of the inner shell and the wedge-shaped step connecting structure of the outer shell is 4-10.
7. The co-cured attachment structure for a thermoplastic composite automotive bumper according to claim 6, wherein: the transition length of the single group of steps is 20-60mm.
8. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the fiber layering arrangement of the inner shell wedge-shaped step connecting structure and the outer shell wedge-shaped step connecting structure adopts an oblique superposition mode.
9. The co-cured attachment structure for a thermoplastic composite automotive bumper according to claim 8, wherein: the fiber layering arrangement of the inner shell wedge-shaped step connection structure and the outer shell wedge-shaped step connection structure is selected from one or a combination of +/-30 degrees, +/-45 degrees, +/-60 degrees, 0 degrees +/-30 degrees, 0 degrees +/-45 degrees and 0 degrees +/-60 degrees.
10. The co-cured attachment structure of a thermoplastic composite automotive bumper according to claim 1, wherein: the braiding structure of the hybrid fiber multi-dimensional braiding reinforcing structure is selected from three-dimensional four-way, three-dimensional five-way, three-dimensional six-way or three-dimensional seven-way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833229.4U CN220562207U (en) | 2023-07-12 | 2023-07-12 | Co-curing connection structure of thermoplastic composite material automobile bumper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833229.4U CN220562207U (en) | 2023-07-12 | 2023-07-12 | Co-curing connection structure of thermoplastic composite material automobile bumper |
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| CN220562207U true CN220562207U (en) | 2024-03-08 |
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|---|---|---|---|
| CN202321833229.4U Active CN220562207U (en) | 2023-07-12 | 2023-07-12 | Co-curing connection structure of thermoplastic composite material automobile bumper |
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| Country | Link |
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| CN (1) | CN220562207U (en) |
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- 2023-07-12 CN CN202321833229.4U patent/CN220562207U/en active Active
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