CN112141036A - Energy absorption box for anti-collision beam and manufacturing method of energy absorption box - Google Patents
Energy absorption box for anti-collision beam and manufacturing method of energy absorption box Download PDFInfo
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- CN112141036A CN112141036A CN201910578606.6A CN201910578606A CN112141036A CN 112141036 A CN112141036 A CN 112141036A CN 201910578606 A CN201910578606 A CN 201910578606A CN 112141036 A CN112141036 A CN 112141036A
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- energy absorption
- absorption box
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
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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
- B29C70/38—Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
- B29C70/382—Automated fiber placement [AFP]
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Abstract
The invention discloses an energy absorption box for an anti-collision beam and a manufacturing method of the energy absorption box, wherein the energy absorption box comprises the following components: the energy absorption box comprises an energy absorption box body, wherein the energy absorption box body is of a cylindrical structure and is formed by a plurality of layers of first carbon fiber layers; the fastening layer is arranged on the outer side of at least part of the first carbon fiber paving layers in the multiple layers, and the fastening layer extends along the circumferential direction of the energy absorption box body to hoop the part of the first carbon fiber paving layers. The energy absorption box disclosed by the invention is light in weight, low in cost and stable in deformation.
Description
Technical Field
The invention relates to the field of vehicles, in particular to an energy absorption box for an anti-collision beam and a manufacturing method of the energy absorption box.
Background
In the related art, most energy absorption boxes of vehicles are made of metal parts, and deform to absorb impact energy when the vehicles collide, however, the energy absorption boxes made of metal parts are heavy, so that energy consumption of the vehicles is increased, and the development direction of light weight of the vehicle body at present cannot be met.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to provide a crash box for an impact beam which is light in weight, low in cost and stable in deformation.
The invention also provides a manufacturing method for the energy absorption box.
The energy absorption box for the anti-collision beam comprises the following components: the energy absorption box comprises an energy absorption box body, wherein the energy absorption box body is of a cylindrical structure and is formed by a plurality of layers of first carbon fiber layers; the fastening layer is arranged on the outer side of at least part of the first carbon fiber paving layers in the multiple layers, and the fastening layer extends along the circumferential direction of the energy absorption box body to hoop the part of the first carbon fiber paving layers.
According to the energy absorption box for the anti-collision beam, the energy absorption box body is constructed into the carbon fiber piece, so that the structural strength of the energy absorption box is improved, the weight of the energy absorption box is reduced, meanwhile, the carbon fiber reinforced layer fastening layer is arranged on the energy absorption box body, the structural strength of the energy absorption box is further enhanced, and the energy absorption effect of the energy absorption box is improved. According to one embodiment of the invention, the crash box body is configured as a cylindrical structure, and the carbon fiber direction of the carbon fiber reinforced layer is orthogonal to the length direction of the crash box body.
According to one embodiment of the invention, the length of the fastening layer in the direction of impact of the crash box is smaller than the length of the body of the crash box in the direction of impact of the crash box.
According to one embodiment of the invention, the fastening layer is formed by a second carbon fiber layer, and the direction of carbon fibers of the second carbon fiber layer is orthogonal to the direction of the energy absorption box subjected to impact.
According to one embodiment of the invention, the carbon fiber lay-up is a uniaxial continuous fiber lay-up.
According to an embodiment of the invention, the fastening layer is arranged in a middle position of the crash box body.
According to one embodiment of the invention, the crash box body is constant in cross section and uniform in wall thickness along the length.
According to one embodiment of the invention, the shape of the one end of the energy absorption box body is configured to follow the shape of the impact beam.
According to one embodiment of the invention, at least some of the carbon fibers in the first plurality of carbon fiber plies are oriented differently.
According to one embodiment of the invention, an energy absorption chamber is arranged in the energy absorption box body, and filling foam is arranged in the energy absorption chamber.
The method of manufacturing the crash box according to the invention is briefly described below.
The manufacturing method of the energy absorption box comprises at least the following steps: the carbon fiber is adhered with resin after passing through the resin pool to become infiltrated carbon fiber; winding the infiltrated carbon fibers on the core mold according to the designed arrangement by a winding machine to form an inner layer first carbon fiber layer; controlling a winding machine to wind the infiltrated carbon fibers which are orthogonal to the direction of the energy absorption box under impact on the outer side of the first carbon fiber layer of the inner layer so as to form a second carbon fiber layer; optionally, continuously winding and infiltrating carbon fibers outside the second carbon fiber paving layer and the first carbon fiber paving layer of the inner layer to form an outer layer first carbon fiber paving layer.
According to the manufacturing method for the energy absorption box, the energy absorption box is manufactured in a manner of winding and infiltrating carbon fibers, compared with the traditional metal parts, the steps of stamping and welding are omitted, the energy absorption box can be formed at one time, and the size precision of the parts is effectively improved; meanwhile, the production can be fully automated, the production beat and efficiency of parts are obviously improved, and the production cost is effectively reduced.
According to one embodiment of the invention, the two ends of the core mold are provided with winding stitches for adjusting the direction of the carbon fibers.
According to one embodiment of the invention, the mandrel and winding pins are sprayed with a release agent prior to winding the carbon fibers.
According to one embodiment of the present invention, the infiltrated carbon fibers wound in a direction of 0 °, ± 30 °, ± 45 °, ± 60 ° or 90 ° to the axial direction of the core mold are formed into the second carbon fiber mat with infiltrated carbon fibers wound in a direction of 90 ° to the axial direction of the core mold.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of an impact beam according to an embodiment of the present invention;
FIG. 2 is a schematic view of the mating of an inner tubular beam with an outer tubular beam according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a core mold for manufacturing an inner tubular beam according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a core mold for manufacturing an inner tubular beam according to an embodiment of the present invention;
fig. 5 is a schematic view after a plurality of core molds for manufacturing an inner tubular beam are fixed according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a crash box according to an embodiment of the invention;
FIG. 7 is a schematic illustration of the location of a fastening layer in a crash box according to an embodiment of the invention;
FIG. 8 is a schematic view of a core mold used to manufacture the crash box according to an embodiment of the invention;
FIG. 9 is a schematic structural view of an impact beam assembly according to an embodiment of the present invention;
FIG. 10 is an exploded view of an impact beam assembly according to an embodiment of the present invention;
FIG. 11 is a schematic view of a crash box according to an embodiment of the present invention mated to a first and second adapter bracket, respectively;
FIG. 12 is a flow chart of a method of manufacturing a crash box according to an embodiment of the invention;
fig. 13 is a flow chart of a method of manufacturing an impact beam according to an embodiment of the present invention.
Reference numerals:
the impact beam assembly 10 is shown in an exemplary embodiment,
the impact beam 1 is provided with a plurality of anti-collision beams,
an inner tubular beam 11, a first inner tubular beam 111, a second inner tubular beam 112, a third inner tubular beam 113,
the outer tubular beam 12 is provided with,
the energy-absorbing box 2 is arranged on the upper portion of the vehicle,
the crash box body 21, the first sidewall 211, the second sidewall 212, the third sidewall 213, the fourth sidewall 214,
the combination of the fastening layer 215, the rounded corners 216,
a first transit bracket 31, a first burring part 311, a second transit bracket 32, a second burring part 321,
the towing hook 4 is arranged on the front end of the trailer hook,
the pedestrian protection support 5 is provided with a pedestrian protection support,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An impact beam 1 for a vehicle according to an embodiment of the present invention will be described below with reference to fig. 1 to 11.
The impact beam 1 according to the invention comprises an inner tubular beam 11 and an outer tubular beam 12, a plurality of inner tubular beams 11 arranged side by side extending transversely to the direction of travel of the vehicle; an accommodating space for accommodating a plurality of inner tubular beams 11 is arranged in the outer tubular beam 12, wherein the outer tubular beam 12 and the inner tubular beams 11 are formed by laying a plurality of carbon fiber laying layers and infiltrating resin, and the outer tubular beam 12 is coated on the outer side of the inner tubular beams 11. According to the anti-collision beam 1 provided by the invention, the inner tubular beams 11 can be arranged in the vertical and/or front-back directions, the inner tubular beams 11 can extend in the left-right direction of the vehicle, when the inner tubular beams 11 are arranged at the front side of the vehicle, the inner tubular beams 11 can be ensured to cover the width direction of the vehicle, the protection effect of the anti-collision beam 1 on the strong side of the vehicle is improved, the inner tubular beams 11 are arranged side by side, so that the inner tubular beams 11 are combined into a structure with a good anti-collision effect, the outer tubular beams 12 can accommodate the inner tubular beams 11 in the accommodating space of the outer tubular beams 12, the arrangement structures of the inner tubular beams 11 can be maintained, and the outer tubular beams 12 are simultaneously wrapped at the outer sides of the inner tubular beams 11, so that the structural strength of the anti-collision beam 1 is improved.
When the anti-collision beam 1 of the vehicle is impacted, the outer surface of the outer tubular beam 12 is impacted firstly, the impact force is gradually transmitted to the plurality of inner tubular beams 11 in the accommodating space, and the plurality of inner tubular beams 11 can sequentially transmit the impact force, so that the impact force is buffered, and the destructiveness of the impact force is reduced; the impact force can also be transmitted simultaneously to a plurality of interior tubular beams 11, makes the impact force disperse to every interior tubular beam 11 on, reduces the deformation degree of a plurality of interior tubular beams 11, improves anticollision roof beam 1's structural strength. The arrangement type of the inner tubular beams 11 is not limited herein, but it is certain that the structural strength of the impact beam 1 can be effectively improved and the damage caused by the impact force can be reduced by arranging the inner tubular beams 11 in the outer tubular beam 12, so that the impact beam 1 can improve the frontal impact resistance of the vehicle.
The inner tubular beam 11 and the outer tubular beam 12 are arranged to be paved by a plurality of carbon fiber paving layers and formed by infiltrating resin, so that the structural strength of the inner tubular beam 11 and the outer tubular beam 12 after molding can be ensured, the reliability of the anti-collision beam 1 is improved, and the weight of the anti-collision beam is reduced.
According to the anti-collision beam 1, the plurality of inner tubular beams 11 are arranged in the accommodating space of the outer tubular beam 12, the plurality of inner tubular beams 11 can be kept stable under the constraint of the outer tubular beam 12, the structural strength of the anti-collision beam 1 can be improved due to the arrangement of the plurality of inner tubular beams 11 and the outer tubular beam 12, the anti-collision performance of a vehicle can be greatly improved due to the anti-collision beam 1, the safety of the vehicle is ensured, and the inner tubular beams 11 and the outer tubular beams 12 are paved by adopting a plurality of carbon fiber paving layers, so that the structural strength of the anti-collision beam 1 is further improved. According to one embodiment of the invention, the plurality of inner tubular beams 11 are sequentially arranged in the vertical direction, and the plurality of inner tubular beams 11 are sequentially arranged in the vertical direction, so that the protection area of the anti-collision beam 1 is increased, and the width of the anti-collision beam 1 in the horizontal direction is reduced. The plurality of inner tubular beams 11 are arranged in the up-down direction, so that when the anti-collision beam 1 bears impact force, the front side of each inner tubular beam 11 is stressed, the impact force can be uniformly dispersed to each inner tubular beam 11, excessive impact force is avoided, the impact resistance of the anti-collision beam 1 is improved, and the anti-collision beam 1 can protect vehicles more effectively.
As shown in fig. 2, according to an embodiment of the present invention, the plurality of inner tubular beams 11 include a first inner tubular beam 111, a second inner tubular beam 112, and a third inner tubular beam 113 arranged in sequence from top to bottom, and a height of the first inner tubular beam 111, a height of the second inner tubular beam 112, and a height of the third inner tube are different. The first inner tubular beam 111, the second inner tubular beam 112 and the third inner tubular beam 113 are set to different heights, and the structure of the inner tubular beams 11 can be optimized according to the stress conditions of each point in the anti-collision beam 1, for example, when the impact force at a certain point is concentrated, the height of the inner tubular beam 11 can be reduced, so that the front stress area of the inner tubular beam 11 is reduced, the structural strength of the inner tubular beam 11 is improved, and for the position with relatively small impact force, the height of the inner tubular beam 11 can be properly improved, and the stress surface of the inner tubular beam 11 is ensured to be in a proper range.
Set up a plurality of interior tubular beams 11 into different heights, optimized crashproof roof beam 1's structure, made crashproof roof beam 1 have better impact effect.
In an embodiment of the present invention, the height of the second inner tubular beam 112 is smaller than the height of the first inner tubular beam 111, the height of the first inner tubular beam 111 is smaller than the height of the third inner tubular beam 113, the second inner tubular beam 112 is disposed near the middle of the impact beam 1, the middle of the impact beam 1 is subjected to a larger impact force, and the height of the second inner tubular beam 112 is set to be the smallest, so that the structural strength of the second inner tubular beam 112 is higher than that of the first inner tubular beam 111 and the third inner tubular beam 113, and the impact beam 1 can better bear the impact force.
According to an embodiment of the present invention, the filling foam is further disposed in the channel of the inner tubular beam 11, the inner tubular beam 11 may be configured as a hollow beam, the filling foam is disposed inside the inner tubular beam 11, so that the energy absorbing member is added inside the inner tubular beam 11, and the inner tubular beam 11 absorbs energy through the energy absorbing member when deforming, so as to obtain better impact resistance, improve the energy absorbing effect of the anti-collision beam 1, and effectively reduce the injury to passengers in the vehicle.
According to an embodiment of the present invention, other types of materials may be further disposed inside the inner tubular beam 11, which is not limited to filling foam, and structures such as reinforcing ribs may be further disposed inside the inner tubular beam 11, so as to improve the structural strength of the inner tubular beam 11 and enhance the energy absorption effect of the impact beam 1, so as to further improve the impact resistance and safety performance of the vehicle.
According to an embodiment of the present invention, the inner tubular beam 11 and the outer tubular beam 12 are both carbon fiber tubular beams, and the inner tubular beam 11 and the outer tubular beam 12 are both made of carbon fiber material tubular beams, so that the structural strength of the impact beam 1 can be ensured, the weight of the impact beam 1 can be reduced, and the impact resistance of the impact beam 1 can be improved.
According to one embodiment of the invention, the outer tubular beam 12 or each inner tubular beam 11 is formed by combining a plurality of carbon fiber layers, and at least part of the carbon fiber layers are laid at different angles. The carbon fiber layers are different in laying angle, so that carbon fiber materials can have different performances, the inner tubular beam 11 and the outer tubular beam 12 are composed of a plurality of carbon fiber layers, the laying angles of the layers are set to be different, the inner tubular beam 11 and the outer tubular beam 12 can have more comprehensive performances, meanwhile, the angles of the layers can be changed according to specific requirements, the structural strength of the inner tubular beam 11 and the outer tubular beam 12 is further improved, and the anti-collision beam 1 has better anti-collision performance.
According to one embodiment of the invention, each inner tubular beam 11 is formed by combining a plurality of +/-45-degree carbon fiber layers, a plurality of 0-degree carbon fiber layers and a plurality of 90-degree carbon fiber layers.
According to one embodiment of the invention, a support core is disposed between a plurality of carbon fiber plies. The support core may be used to maintain the structure of each carbon fiber ply.
The following describes a method of forming the impact beam 1.
As shown in fig. 3 to 5, a plurality of core molds 6 are prepared, and a plurality of carbon fiber plies are laid on each core mold 6 to form an inner tubular beam 11 preform; laying a plurality of carbon fiber layers on the outer sides of a plurality of inner tubular beam 11 preforms arranged side by side to form outer tubular beam 12 preforms; the outer tubular beam 12 preform and the plurality of inner tubular beam 11 preforms are simultaneously infiltrated with resin to form the plurality of inner tubular beam 11 preforms into the plurality of inner tubular beams 11, and the outer tubular beam 12 preform is formed into the outer tubular beam 12 that wraps outside the plurality of inner tubular beams 11. As shown in fig. 3 and 4, the core mold 6 may be configured in a columnar structure, and by providing a plurality of layers on the core mold 6 to form an inner tubular beam 11 preform, fixing a plurality of core molds 6 after forming the inner tubular beam 11 preform, and laying a plurality of carbon fiber layers again on the outer peripheries of the plurality of inner tubular beam 11 preforms to form an outer tubular beam 12 preform, the inner tubular beam 11 preform may be provided inside the outer tubular beam 12 preform during the preforming process to form the integral structure of the impact beam 1, and then simultaneously infiltrating the inner tubular beam 11 and the outer tubular beam 12 with resin to simultaneously mold and fix the inner tubular beam 11 and the outer tubular beam 12. After the inner tubular beam 11 and the outer tubular beam 12 are fixed and molded, the core mold provided in the inner tubular beam 11 may be withdrawn, and the molded impact beam 1 may be cut according to a desired length.
According to the forming and manufacturing method of the anti-collision beam 1, the inner tubular beam 11 can be arranged inside the outer tubular beam 12 in the forming process, the inner tubular beam 11 and the outer tubular beam 12 do not need to be formed independently, meanwhile, the inner tubular beams 11 and the outer tubular beam 12 can be matched tightly, the reliability of the anti-collision beam 1 is guaranteed, and the forming and manufacturing method of the anti-collision beam 1 is high in forming speed and low in defective rate.
As shown in fig. 4, according to an embodiment of the present invention, each of the core molds 6 is provided with a groove 61 extending in the longitudinal direction, and by providing the groove 61 on each of the core molds 6, the resin can be made to flow better in the core mold 6, and the impregnation effect of the carbon fiber layer can be improved.
According to one embodiment of the invention, the first carbon fiber layer and the outermost carbon fiber layer of the core mold 6 are 3D woven layers, the carbon fiber layers woven in 3D mode have the characteristics of light weight, high specific stiffness and high specific strength, the structural strength of the inner tubular beam 11 and the outer tubular beam 12 can be improved by the carbon fiber layers woven in 3D mode, and meanwhile the anti-collision beam 1 has better anti-collision performance.
According to one embodiment of the invention, the 3D braid is a ± 45 ° carbon fiber lay-up.
The crash box 2 according to the invention for an impact beam 1 is described below.
The energy absorption box comprises an energy absorption box body 21 and a fastening layer 215, wherein the energy absorption box body 21 is of a cylindrical structure, and the energy absorption box body 21 is formed by a plurality of layers of first carbon fiber layers; a fastening layer 215, wherein the fastening layer 215 is arranged at least partially outside the plurality of first carbon fiber layers, and the fastening layer 215 extends along the circumferential direction of the energy absorption box body 21 to hoop part of the first carbon fiber layers.
As shown in fig. 6, the crash box 2 for the impact beam 1 according to the present invention includes a crash box body 21, one end of the crash box body 21 is connected to the impact beam 1, the other end of the crash box body 21 is connected to a side member of a vehicle, the crash box body 21 is configured as a carbon fiber member, and a fastening layer 215 is provided on the crash box body 21.
According to the energy absorption box body 21 provided by the invention, the first carbon fiber layers are formed in multiple layers, so that the energy absorption box body 21 has the advantages of high strength and light weight, the weight of the energy absorption box 2 can be greatly reduced, the structural strength of the energy absorption box 2 is enhanced, and the energy absorption effect of the energy absorption box 2 is improved. The fastening layer 215 is arranged on the outer side of the first carbon fiber paving layer, so that the structural strength of the energy absorption box 2 can be further improved, and the fastening layer 215 extends in the circumferential direction of the energy absorption box body 21 and is suitable for improving the structural strength of the first carbon fiber paving layer in the circumferential direction.
Further, the fastening layer 215 can be arranged at a stress concentration point in the energy-absorbing box body 21, the structural strength of the energy-absorbing box body 21 is further improved through the arrangement of the fastening layer 215, and the energy-absorbing effect of the energy-absorbing box 2 is improved.
According to the energy-absorbing box 2 for the anti-collision beam 1, the energy-absorbing box body 21 is made of the carbon fiber piece, so that the structural strength of the energy-absorbing box 2 is improved, the weight of the energy-absorbing box 2 is reduced, meanwhile, the fastening layer 215 is arranged on the energy-absorbing box body 21, the structural strength of the energy-absorbing box 2 is further enhanced, and the energy-absorbing effect of the energy-absorbing box 2 is improved.
According to an embodiment of the present invention, the length of the fastening layer 215 in the direction of the impact of the crash box 2 is smaller than the length of the crash box body 21 in the direction of the impact of the crash box 2. It can be understood that fastening layer 215 can be constructed as the ring that encircles outside a plurality of first carbon fiber shop layers, and fastening layer 215's thickness is less than the thickness of energy-absorbing box 2, this makes fastening layer 215's structural strength weak with the structural strength of first carbon fiber shop layer, when the energy-absorbing box received the impact, fastening layer 215 can produce deformation because of the impact force, after fastening layer 215 takes place the deformation, produce the mutagenic effect to first carbon fiber shop layer, make first carbon fiber shop layer also take place deformation thereupon, and not directly transmit the impact force backward, so set up fastening layer 215 can ensure that energy-absorbing box 2 can stabilize deformation after receiving the impact force.
As shown in FIG. 7, according to one embodiment of the present invention, the fastening layer 215 is formed of a second carbon fiber laminate having a carbon fiber direction orthogonal to the direction in which the energy absorption box 2 is impacted.
The crash box body 21 according to the present invention may be configured in a cylindrical structure, and the carbon fiber direction of the fastening layer 215 is orthogonal to the length direction of the crash box body 21. The opening of the tubular structure of the energy-absorbing box body 21 is in the front-back direction, namely the length direction of the energy-absorbing box 2 is the connecting line direction between the front opening and the back opening, the front side and the back side of the energy-absorbing box body 21 are respectively connected with the anti-collision beam 1 and the longitudinal beam of the vehicle, and when the vehicle is subjected to frontal collision, the energy-absorbing box body 21 deforms from front to back; fastening layer 215 has better anti deformability in fibrous length direction, and take place deformation relatively more easily in fibrous width direction, the fibre direction setting of fastening layer 215 and the length direction quadrature of energy-absorbing box body 21, the width direction that makes the carbon fiber is unanimous with the deformation direction of energy-absorbing box body 21, at the in-process of energy-absorbing box 2 transmission impact force, fastening layer 215 takes place deformation more easily, make energy-absorbing box 2's local strength change, in order to play the effect of induced deformation, ensure energy-absorbing box 2's deformation stability, promote energy-absorbing box 2's energy-absorbing effect, and then reduce the impact force of frontal collision to passenger in the car. According to one embodiment of the invention, the carbon fiber layer adopts a single-axial continuous fiber layer, and the adoption of the single-axial continuous fiber layer improves the structural strength of the carbon fiber layer and reduces the manufacturing difficulty of the carbon fiber layer.
According to an embodiment of the present invention, the fastening layer 215 is disposed at the middle position of the crash box body 21 to ensure that the fastening layer 215 can reliably receive the impact force when the vehicle collides, and ensure that the impact force is applied to the fastening layer 215, so that the fastening layer 215 can induce the deformation of the crash box body 21 under the impact force, and the crash box body 21 can be stably deformed after the impact.
As shown in fig. 7, according to one embodiment of the invention, the crash box body 21 comprises a first sidewall 211, a second sidewall 212, a third sidewall 213 and a fourth sidewall 214, wherein the first sidewall 211, the second sidewall 212, the third sidewall 213 and the fourth sidewall 214 are connected end to end and the round corners 216 between two adjacent sidewalls are excessive; wherein the fastening layer 215 is disposed at the rounded corner 216 between the two adjacent sidewalls.
The first side wall 211, the second side wall 212, the third side wall 213 and the fourth side wall 214 are sequentially connected, so that the energy absorption box body 21 is of a cylindrical structure, the fillet 216 is arranged between the two adjacent side walls, the using amount of carbon fiber materials can be reduced, the cost of the energy absorption box 2 is reduced, meanwhile, the fillet 216 is arranged to enable the periphery of the energy absorption box body 21 to be more smooth, and the processing difficulty is reduced. Fillet 216 department between two adjacent lateral walls sets up fastening layer 215, can improve the structural strength of fillet 216 department, the structural strength of fillet 216 department is lower than the structural strength of other lateral wall positions, deformation takes place more easily, set up fastening layer 215 in fillet 216 department, deformation can be better induced fillet 216 department through fastening layer 215's deformation and take place deformation, make energy-absorbing box body 21 in time deform after bumping, with the absorption impact force, protect the passenger.
According to an embodiment of the invention, the section of the energy-absorbing box body 21 in the length direction is constant, and the wall thickness is the same, it can be understood that the wall thickness of the first side wall 211, the second side wall 212, the third side wall 213 and the fourth side wall 214 and the round angle 216 connecting the two adjacent side walls in the length direction are the same, so that when the energy-absorbing box body 21 bears an impact force from the front side, the stress at each position is uniform, the strength is uniform, the energy-absorbing box body 21 is ensured to be stably deformed at each position in the front-back direction, excessive deformation at one position in the energy-absorbing box body 21 is avoided, the deformation at other positions is smaller, and the stable and sufficient deformation of the energy-absorbing box body 21 is ensured.
According to one embodiment of the invention, one end of the energy absorption box 2 is arranged along the shape of the anti-collision beam 1, the anti-collision beam 1 can be in an arc shape with two ends bent towards the rear side of a vehicle, the energy absorption box 2 is arranged on the rear surface of the anti-collision beam 1, in order to ensure the stable connection between the energy absorption box 2 and the front side of the anti-collision beam 1, the front end structure of the energy absorption box 2 is matched with the shape of the rear surface of the anti-collision beam 1, so that the front end of the energy absorption box 2 can be stably attached to the rear surface of the anti-collision beam 1, the force transfer effect between the anti-collision beam 1 and the energy absorption box 2 is improved, the stress of the front end of the energy absorption box 2 is uniform.
According to one embodiment of the invention, the energy absorption box 2 is formed by combining a plurality of carbon fiber layers, the plurality of carbon fiber layers are all single-axial continuous fiber layers, the directions of fibers in the single-axial fiber layers can be 0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees and the like, each fiber layer has good structural strength, and the single-axial fiber layers are more easily changed, so that the energy absorption box 2 can effectively absorb impact energy when being subjected to frontal impact.
According to one embodiment of the invention, at least part of the carbon fiber directions in the first carbon fiber layers are different, and the carbon fiber directions of the first carbon fiber layers are constructed to extend at different angles, so that the structural strength of the energy absorption box body 21 after the first carbon fiber layers are combined can be improved, the energy absorption box 2 can absorb more energy after being deformed, and the safety of a vehicle is improved.
According to one embodiment of the invention, the energy absorption cavity is arranged in the energy absorption box body 21, the filling foam is arranged in the energy absorption cavity, the energy absorption effect of the energy absorption box 2 can be improved by arranging the filling foam in the energy absorption cavity, the filling foam can further absorb the impact energy from the vehicle forward direction, and the energy absorption effect of the energy absorption box 2 is improved.
Other types of energy absorbing pieces can be arranged in the energy absorbing box 2, for example, reinforcing ribs are additionally arranged, or metal pipes are arranged in the energy absorbing box 2, so that the energy absorbing effect of the energy absorbing box 2 can be further improved through the arrangement of the energy absorbing pieces, the mechanical property, the failure mode and the fracture mode of the energy absorbing box 2 are changed, the collision requirements of different vehicle types are met, and the adaptability of the energy absorbing box 2 is improved.
The method of manufacturing the crash box 2 according to the invention is briefly described below.
The manufacturing method of the crash box 2 comprises the following steps: the carbon fiber is adhered with resin after passing through the resin pool to become infiltrated carbon fiber; the wetting carbon fibers are distributed and wound on the core mold 6 according to the design through a winding machine to form an inner-layer first carbon fiber layer, and the winding machine is controlled to wind the wetting carbon fibers on the outer side of the inner-layer first carbon fiber layer in a direction perpendicular to the impacted direction of the energy absorption box 2 to form a second carbon fiber layer; optionally, continuously winding and infiltrating carbon fibers outside the second carbon fiber paving layer and the inner first carbon fiber layer to form an outer first carbon fiber paving layer.
According to the manufacturing method for the energy absorption box 2, the energy absorption box 2 is manufactured in a mode of winding and infiltrating the first carbon fiber layer and the second carbon fiber layer, compared with the traditional metal parts, the steps of stamping and welding are omitted, the energy absorption box can be formed at one time, and the size precision of the parts is effectively improved; meanwhile, the production can be fully automated, the production beat and efficiency of parts are obviously improved, and the production cost is effectively reduced.
According to an embodiment of the present invention, winding stitches 62 for adjusting the direction of the carbon fibers are provided at both ends of the core mold 6, as shown in fig. 8, according to an embodiment of the present invention, the core mold 6 is provided with the winding stitches 62 for arranging the carbon fiber layer of 0 °, the core mold 6 is provided with the winding stitches 62, so that the fibers in the carbon fiber layer are wound on the winding stitches 62, the stability of the fiber layer is ensured, the winding of the fiber layer is more reliable and convenient, and the density of the winding stitches 62 can be changed according to specific requirements.
According to one embodiment of the invention, before winding the carbon fibers, a release agent is coated on the core mold 6 and the winding stitches 62, so that the core mold 6 can be easily drawn out of the formed energy absorption box 2 after the carbon fibers are wound, and the core mold 6 is cleaned by acetone while the release agent is sprayed, so that the forming of the carbon fibers is stable and reliable.
According to one embodiment of the invention, the direction of winding of the infiltrated carbon fiber is 0 °, ± 30 °, ± 45 °, ± 60 ° or 90 ° to the horizontal axis.
According to an embodiment of the present invention, the core mold 6 is cooled together with the molded component until the core mold 6 is separated from the molded component, and then the core mold 6 is withdrawn. After the carbon fiber is wound, the core mold 6 is cured in a sealed container, and in order to ensure the curing effect, the core mold rotates around the central shaft during the curing process, so that all parts are heated uniformly. And after the solidification is finished, synchronously cooling the core mold 6 and the formed part until the carbon fiber part is solidified, and drawing out the core mold 6 from the middle part of the formed part to finish the forming of the energy absorption box 2.
An impact beam assembly 10 according to the present invention is described below.
As shown in fig. 9 and 10, an impact beam assembly 10 according to the present invention includes an impact beam 1 and an energy absorption box 2, wherein the impact beam 1 extends transversely to a driving direction of a vehicle, the energy absorption box 2 is configured as a tubular structure, one end of the energy absorption box 2 is fixedly connected to the impact beam 1, and the other end of the energy absorption box 2 is connected to a longitudinal beam of the vehicle, wherein the impact beam 1 and the energy absorption box 2 are both made of carbon fiber. The carbon fiber part is used as the anti-collision beam 1 and the energy absorption box 2, so that the weight of the anti-collision beam assembly 10 can be effectively reduced, the strength of the anti-collision beam assembly 10 is improved, the anti-collision capacity of a vehicle is effectively improved by the anti-collision beam assembly 10, and the safety performance of the vehicle is improved.
According to the anti-collision beam assembly 10 for the vehicle, the anti-collision beam 1 and the energy absorption box 2 are made of the carbon fiber pieces, so that the weight of the anti-collision beam assembly 10 is effectively reduced, meanwhile, the energy absorption effect of the energy absorption box 2 can be effectively improved by using the carbon fiber pieces, the structural strength of the anti-collision beam 1 is enhanced, the anti-collision capacity of the vehicle can be better improved by using the anti-collision beam assembly 10, and the safety performance of the vehicle is improved.
According to one embodiment of the invention, the energy absorption box 2 is connected with the anti-collision beam 1 through the first adapter bracket 31, the energy absorption box 2 is connected with the longitudinal beam through the second adapter bracket 32, and the first adapter bracket 31 is fixedly bonded with the anti-collision beam 1, the first adapter bracket 31 is fixedly bonded with the energy absorption box 2, and the energy absorption box 2 is fixedly bonded with the second adapter bracket 32. The anti-collision beam 1, the first switching support 31, the energy absorption box 2, the second switching support 32 and the longitudinal beam are fixed through bonding, the number of parts in the anti-collision beam assembly 10 can be reduced, the connection relation among the parts is simplified, the connection among the parts is simpler and more convenient, and meanwhile, the bonding fixation is adopted, so that the connection strength among the parts can be met.
And the first transfer bracket 31 and the anti-collision beam 1, the first transfer bracket 31 and the energy absorption box 2 and the second transfer bracket 32 are fixed by adopting double-component epoxy structural adhesive so as to ensure the reliability of connection between parts.
According to an embodiment of the invention, the first transfer bracket 31 is provided with a first flanging part 311 matched with the energy-absorbing box 2, the second transfer bracket 32 is provided with a second flanging part 321 matched with the energy-absorbing box 2, and the arrangement of the first flanging part 311 is suitable for improving the contact area between the first transfer bracket 31 and the energy-absorbing box 2, so that the connection between the first transfer bracket 31 and the energy-absorbing box 2 is more stable, and the connection strength between the first transfer bracket 31 and the energy-absorbing box 2 is improved; the second flanging portion 321 is suitable for increasing the contact area between the second adapter bracket 32 and the crash box 2, so that the connection between the second adapter bracket 32 and the crash box 2 is more stable, and the connection strength between the second adapter bracket 32 and the crash box 2 is increased.
As shown in FIG. 11, according to one embodiment of the present invention, the crash box 2 is configured as a tubular structure, and the first cuff portion 311 is fixed to an inner wall surface of one end of the crash box 2, and the second cuff portion 321 is fixed to an inner wall surface of the other end of the crash box 2. The first adapter bracket 31 and the second adapter bracket 32 are respectively arranged at the front end and the rear end of the energy absorption box 2, the first flanging part 311 can extend towards the rear side on the first adapter bracket 31, so that the first flanging part 311 forms a cylindrical flanging structure slightly smaller than the diameter of the energy absorption box 2, and when the first flanging part 311 is connected with the energy absorption box 2, the first flanging part 311 can be arranged in the energy absorption box 2 and fixedly connected with the inner wall surface of the energy absorption box 2; the second burring part 321 may extend toward the front side on the second adaptor bracket 32, so that the second burring part 321 forms a cylindrical burring structure slightly smaller than the diameter of the crash box 2, and when the second burring part 321 is connected with the crash box 2, the second burring part 321 may be disposed inside the crash box 2 and fixedly connected with the inner wall surface of the crash box 2.
The first transfer support 31 comprises a first transfer support body part, the first transfer support body part extends along the vertical direction, is opposite to the front end face of the energy absorption box 2 and is suitable for being bonded and fixed with the end face of the energy absorption box 2; the second adapter bracket 32 includes a second adapter bracket body portion extending in the vertical direction and facing the rear end face of the energy absorption box 2, and adapted to be bonded and fixed to the end face of the energy absorption box 2.
According to one embodiment of the invention, the anti-collision beam assembly 10 further comprises a tow hook 4, the tow hook 4 is arranged on the anti-collision beam 1 and is fixedly bonded with the anti-collision beam 1, wherein the tow hook 4 and the anti-collision beam 1 can be connected through glue riveting, the glue riveting has higher strength compared with common bonding and fixing strength, the tow hook 4 can be better fixed on the anti-collision beam 1, and the connection strength between the tow hook 4 and the anti-collision beam 1 is improved.
According to one embodiment of the invention, the tow hook 4 comprises a tow hook mounting plate and a tow hook body, the tow hook mounting plate is fixed on the front side of the anti-collision beam 1 by adopting glue riveting connection, and the tow hook body is fixedly connected with the tow hook mounting plate.
According to an embodiment of the present invention, a pedestrian protection bracket 5 is further disposed at the front side of the impact beam assembly 10, and the pedestrian protection bracket 5 can be used for protecting pedestrians and reducing injuries suffered by pedestrians when the pedestrians collide with vehicles.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. An energy absorption box (2) for an impact beam, comprising:
the energy absorption box comprises an energy absorption box body (21), wherein the energy absorption box body (21) is of a cylindrical structure, and the energy absorption box body (21) is formed by a plurality of layers of first carbon fiber layers;
the fastening layer (215) is arranged on the outer side of at least part of the first carbon fiber layups, and the fastening layer (215) extends along the circumferential direction of the energy absorption box body (21) to hoop part of the first carbon fiber layups.
2. An energy absorption box (2) for an impact beam according to claim 1, characterized in that the length of the fastening layer (215) in the direction of impact of the energy absorption box (2) is smaller than the length of the energy absorption box body (21) in the direction of impact of the energy absorption box (2).
3. An energy absorption box (2) for an impact beam according to claim 2, characterized in that said fastening layer (215) is formed by a second carbon fibre lay-up having a carbon fibre direction orthogonal to the direction in which the energy absorption box (2) is impacted.
4. An energy absorption box (2) for an impact beam according to claim 3, characterized in that said carbon fibre lay-up is a uni-axial continuous fibre lay-up.
5. An energy absorption box (2) for an impact beam according to any one of claims 1 to 4, characterized in that said fastening layer (215) is provided in the middle of said box body (21).
6. An energy absorption box (2) for an impact beam according to claim 1, characterized in that said box body (21) has a constant cross section in the length direction and a uniform wall thickness.
7. An energy-absorbing box (2) for an impact beam according to claim 1, characterized in that said one end of the box body (21) is shaped to follow the shape of the impact beam (1).
8. An energy absorption box (2) for an impact beam according to claim 1, characterized in that at least some of said first carbon fibre plies differ in carbon fibre direction.
9. An energy-absorbing box (2) for an impact beam according to claim 1, characterized in that an energy-absorbing chamber is provided in said box body (21), said energy-absorbing chamber being provided with a filling foam.
10. A method for manufacturing a crash box (2), characterized in that it comprises at least the following steps:
the carbon fiber is adhered with resin after passing through the resin pool to become infiltrated carbon fiber;
winding the infiltrated carbon fibers on a core mold (6) according to the designed arrangement by a winding machine to form an inner layer first carbon fiber layer;
controlling a winding machine to wind the infiltrated carbon fibers which are orthogonal to the direction of the impact of the energy absorption box (2) on the outer side of the first carbon fiber layer of the inner layer so as to form a second carbon fiber layer;
optionally, continuously winding and infiltrating carbon fibers outside the second carbon fiber paving layer and the first carbon fiber paving layer of the inner layer to form an outer layer first carbon fiber paving layer.
11. A method of manufacturing a crash box (2) according to claim 10, characterized in that both ends of the core mold (6) are provided with wrapping stitches (62) for adjusting the direction of carbon fibers.
12. A method of manufacturing a crash box (2) according to claim 11, characterized in that a release agent is sprayed on the core mold (6) and the wrapping stitches (62) before the carbon fibers are wrapped.
13. Method for manufacturing an energy absorption box (2) according to claim 10, characterized in that the wetted carbon fibers are wound in a direction of 0 °, ± 30 °, ± 45 °, ± 60 ° or 90 ° to the axial direction of the core mold (6) and are formed into the second carbon fiber lay-up as wetted carbon fibers of 90 ° to the axial direction of the core mold (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578606.6A CN112141036A (en) | 2019-06-28 | 2019-06-28 | Energy absorption box for anti-collision beam and manufacturing method of energy absorption box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910578606.6A CN112141036A (en) | 2019-06-28 | 2019-06-28 | Energy absorption box for anti-collision beam and manufacturing method of energy absorption box |
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| CN112141036A true CN112141036A (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910578606.6A Pending CN112141036A (en) | 2019-06-28 | 2019-06-28 | Energy absorption box for anti-collision beam and manufacturing method of energy absorption box |
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|---|---|---|---|---|
| JPH0532146A (en) * | 1991-04-05 | 1993-02-09 | Toyota Autom Loom Works Ltd | Energy absorbing member for car bumper |
| CN103661183A (en) * | 2013-12-12 | 2014-03-26 | 东华大学 | Hybrid composite energy absorbing part for automobile and manufacturing method thereof |
| CN104590178A (en) * | 2014-12-24 | 2015-05-06 | 芜湖市汽车产业技术研究院有限公司 | Automobile energy absorption box |
| CN105966459A (en) * | 2016-05-12 | 2016-09-28 | 北京汽车股份有限公司 | Vehicle frame for vehicle and vehicle with vehicle frame |
| WO2019078236A1 (en) * | 2017-10-20 | 2019-04-25 | 日東紡績株式会社 | Energy absorption member |
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2019
- 2019-06-28 CN CN201910578606.6A patent/CN112141036A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532146A (en) * | 1991-04-05 | 1993-02-09 | Toyota Autom Loom Works Ltd | Energy absorbing member for car bumper |
| CN103661183A (en) * | 2013-12-12 | 2014-03-26 | 东华大学 | Hybrid composite energy absorbing part for automobile and manufacturing method thereof |
| CN104590178A (en) * | 2014-12-24 | 2015-05-06 | 芜湖市汽车产业技术研究院有限公司 | Automobile energy absorption box |
| CN105966459A (en) * | 2016-05-12 | 2016-09-28 | 北京汽车股份有限公司 | Vehicle frame for vehicle and vehicle with vehicle frame |
| WO2019078236A1 (en) * | 2017-10-20 | 2019-04-25 | 日東紡績株式会社 | Energy absorption member |
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Application publication date: 20201229 |