KR101746557B1 - Bumper beam for vehicle - Google Patents

Bumper beam for vehicle Download PDF

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Publication number
KR101746557B1
KR101746557B1 KR1020160008158A KR20160008158A KR101746557B1 KR 101746557 B1 KR101746557 B1 KR 101746557B1 KR 1020160008158 A KR1020160008158 A KR 1020160008158A KR 20160008158 A KR20160008158 A KR 20160008158A KR 101746557 B1 KR101746557 B1 KR 101746557B1
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KR
South Korea
Prior art keywords
bumper beam
profiles
profile
present
manufactured
Prior art date
Application number
KR1020160008158A
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Korean (ko)
Inventor
노영래
전형준
Original Assignee
주식회사 명진테크
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Priority to KR1020160008158A priority Critical patent/KR101746557B1/en
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Publication of KR101746557B1 publication Critical patent/KR101746557B1/en

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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
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
    • B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
    • B62D65/16—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components the sub-units or components being exterior fittings, e.g. bumpers, lights, wipers, exhausts

Abstract

The present invention is configured so that two profiles produced in a predetermined width cross-sectional shape are arranged facing each other in point symmetry and then joined to form a bumper beam. Thus, even if only one kind of profile is manufactured, the bumper beam can be manufactured. And to provide a bumper beam for a vehicle that can reduce costs.
Particularly, according to the present invention, since the joint portions for forming the shock absorbing space to be deformed for shock absorption are formed in the shape of an acid, the protrusions and the grooves are formed on the actually contacting portions and are bonded to each other. It is an object of the present invention to provide a bumper beam for an automobile which is capable of obtaining a sufficient impact absorbing effect without being easily broken while a part is engaged.
In addition, the present invention provides a bumper beam for a vehicle that can be manufactured easily and quickly because a profile of a bumper beam can be manufactured in a single profile through a roll forming method. There is another purpose.

Description

BUMPER BEAM FOR VEHICLE

The present invention relates to a bumper beam for an automobile, in which two bumper beams having a predetermined cross-sectional shape are arranged face to face with respect to each other and then joined together to produce a bumper beam, Further, the joining portions for joining the two profiles are formed in a concavo-convex shape so that the joining force can be increased.

The bumper beams are mounted on the front and rear of the vehicle, respectively, to protect the driver and passengers by absorbing external impact when a collision or collision occurs. Although the bumper beam is often made of steel to protrude from the car body, a shock absorbing bumper beam capable of absorbing an external shock has become popular in recent years. These shock absorbing bumper beams are usually made of materials with superior shock absorbing and restoring properties. The following Patent Documents 1 to 3 disclose techniques relating to such a bumper and a bumper beam.

(Patent Document 1) Korean Patent Publication No. 10-2015-0132142

The cap profile having a central flange and having sides with side flanges which face inward toward the vehicle, The side flanges face outward from the vehicle and the hat profile includes a cover that is recessed into the hat profile and imparts a closed profile.

(Patent Document 2) Korean Patent Publication No. 10-2015-0132143

Wherein the bumper beam has a U-shaped profile and fasteners, the U-shaped profile directed in toward the vehicle and the fasteners are mounted on a side of the vehicle, And has mounting plates welded onto the fasteners for bolting to the end plates on the rails.

(Patent Document 3) Korean Patent Publication No. 10-2015-0143393

Claims [1] A rear bumper for a vehicle, comprising: two rod-shaped bodies of CFRTPC; One bridge of GMT interposed between the two rod-shaped bodies; Wherein the rod-shaped body and the bridge are integrally press-molded and have a shape of a rear bumper.

However, the conventional bumper beam causes the following problems.

(1) Normally, as shown in Fig. 1, a bumper beam is formed by joining two profiles (P1, P2) produced in a concavo-convex shape in the width direction so as to face each other, And is made to have spaces S1 and S2. Thus, the profiles P1 and P2 form at least one joint portion N for partitioning the shock absorbing spaces S1 and S2.

(2) This means that the two profiles P1 and P2, which make the existing bumper beam, are different, so that two profiles P1 and P2 must be produced, respectively. Therefore, since a mold or a roll forming apparatus for manufacturing each profile must be provided separately, the manufacturing facility is required to be large and a manufacturing cost is also required.

(3) Since these profiles P1 and P2 make the joint portions N flat, they may be misjudged when joining to cause defective joining. That is, the two profiles P1 and P2 are overlapped on the flat joint portion N so that the flat joint portions overlap each other, and then the two profiles P1 and P2 are joined to each other to manufacture the bumper beam. When the profiles P1 and P2 are overlapped, There is a fear of escaping, and therefore, a failure may occur at the joint portion.

(4) In addition, as shown in Fig. 1, when the external force is applied to the bumper beam due to collision or collision in the state where the bumper beam is mounted, There is a possibility that the shock absorber is not properly carried out and may put the driver or passenger at risk. That is, when the bumper beam is mounted on the vehicle, the joint portion N is vertically erected perpendicular to the traveling direction of the vehicle. Therefore, when the force generated by collision or collision is applied in the traveling direction of the vehicle, However, when the force is applied in an oblique direction to the traveling direction, the joint portion may be easily broken.

Korean Patent Laid-Open No. 10-2015-0132142 (Publication date: November 25, 2015) Korean Patent Laid-Open No. 10-2015-0132143 (published on 2015.11.25) Korean Patent Publication No. 10-2015-0143393 (Publication date: December 23, 2015)

The present invention takes these points into consideration, and it is constituted such that two profiles produced in a predetermined cross-sectional shape are arranged to face each other in point symmetry and then joined to form a bumper beam. Therefore, even if only one kind of profile is manufactured, And to provide a bumper beam for automobiles that can be manufactured and manufactured at a reduced cost.

Particularly, according to the present invention, since the joint portions for forming the shock absorbing space to be deformed for shock absorption are formed in the shape of an acid, the protrusions and the grooves are formed on the actually contacting portions and are bonded to each other. It is an object of the present invention to provide a bumper beam for an automobile which is capable of obtaining a sufficient impact absorbing effect without being easily broken while a part is engaged.

In addition, the present invention provides a bumper beam for a vehicle that can be manufactured easily and quickly because a profile of a bumper beam can be manufactured in a single profile through a roll forming method. There is another purpose.

In order to achieve the above object, the automobile bumper beam according to the present invention includes a first rim portion 110a and a second rim portion 110b formed by folding at least twice roundly, A bumper beam for a vehicle, which is produced by bonding first and second profiles P 'and P "formed so that at least one joint portion 120a and a second joint portion 120b protrude successively, The first and second rim portions 110a and 110b are formed so as to be bent outward so as to be opposite to each other and are joined to each other, and the first joining portion 120a is provided with a second joining portion 120b At least one protrusion 121 protrudes from the central portion of the first joint portion 120a and a groove shaped like the protrusion 121 is formed in the second joint portion 120b. When the bumper beam is produced And the protrusion 121 and the groove 122 are brought into contact with each other to be joined.

Particularly, the profile P is characterized by being manufactured by a roll forming process. The first and second profiles P 'and P "have a first joint portion 120a and a second joint portion 120b, respectively. The first and second rim portions 110a and 110b and the first joining portion 110a and 110b and the first and second rim portions 110a and 110b and the first and second profiles P and P ' 120a and the second joint portion 120b are formed so as to protrude to one side.

Further, the joining portions 120a and 120b are formed so as to become narrower toward the outside.

The protrusions 112 are formed in the first rim portion 110a and the grooves 111 are formed in the second rim portion 110b so that the protrusions 112 and the grooves 111 (111) overlap each other to be joined.

Finally, the automotive bumper beam is characterized in that at least some sections of the bent portions of the profiles P 'and P "are partially softened.

The bumper beam for a vehicle according to the present invention has the following effects.

(1) A bumper beam is produced by arranging two kinds of profiles having a predetermined width cross-section facing each other in a point symmetric manner and then joining them to each other. Even if only one kind of profile is produced, the bumper beam can be manufactured, There is also the possibility of reducing manufacturing costs through mass production.

(2) Since the bumper beam is manufactured using only one profile as described above, space utilization can be improved by reducing the installation space while reducing the size of the manufacturing facility.

(3) When the two profiles according to the present invention are arranged in such a manner that they face each other in a point-symmetrical manner and then are joined together to form a bumper beam, . In addition, even when an external force is applied in various directions, the portion bonded by the concavo-convex shape has a concave-convex shape, which improves the impact absorption performance without easily breaking the joint portion.

(4) As the shock absorbing performance increases, it is possible to make the thickness of the profile thin when the bumper beam capable of absorbing the impact of the same intensity is manufactured. This can increase automobile fuel economy by reducing the weight of the bumper beam while reducing manufacturing costs by weight reduction.

(5) When the bumper beam is manufactured, the portion where the impact is to be absorbed is partially softened, such as where the stress is concentrated or the impact is expected to be applied, The softened portion can be easily deformed and the shock absorption can be performed well, so that the human life can be safely protected. Further, since the bumper beam formed by the same thickness of the bumper beam is partially softened through the roll forming process, it is difficult to apply a normal roll forming product manufactured with the same thickness to a partially different stiffness and strength It is possible to cope with the performance requirement that requires the roll forming process.

(6) When the two profiles produced according to the present invention are arranged to face each other in point symmetry and then joined to form a bumper beam, the joining portions are brought into contact with each other in an engaging manner like irregularities, The efficiency can be increased. Thus, according to the present invention, since the softening process is partially performed on the bumper beam made of the profile formed to have substantially the same thickness through the roll forming process, the portion thickly molded to the portion which can be made thin due to the rigidity of the other portion The bumper beam can be manufactured so as to obtain an optimal shock absorption performance by softening treatment.

1 is a cross-sectional view showing an example of a bumper beam manufactured by joining two conventional profiles.
FIG. 2 is a perspective view showing a part of a length cut to show the overall shape of a profile according to [Embodiment 1] of the present invention. FIG.
3 is a side view for showing a cross-sectional shape of a profile according to [Example 1] of the present invention.
4 is a view showing a bumper beam produced by joining two profiles having the same cross section according to [Example 1] of the present invention, wherein (a) is a side view of a state before bonding, and (b) Side view of the post-bonding state.
[Fig. 5] is a side view showing a width section of a profile according to [Embodiment 2] of the present invention. [Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should properly define the concept of the term to describe its invention in the best possible way The present invention should be construed in accordance with the spirit and scope of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Thus, various equivalents And variations may be present.

The bumper beam according to the present invention is manufactured by arranging two profiles having the same configuration and having a predetermined length in a point symmetry manner facing each other. Here, the configuration of the profile will be described first, and the bumper beam using the profile will be described later.

(Configuration of profile)

The profile P according to the first embodiment of the present invention is formed such that the first and second edge portions (the first and second edge portions) 110a and 110b are formed and the first joining portion 120a and the second joining portion 120b are protruded and formed at least once alternately in a concave-convex form between the first and second rim portions 110a and 110b .

Particularly, the end of the first joint part 120a forms a protrusion 121 protruding outward from the middle part, and the end of the second joint part 120b can accommodate the protrusion 121 part By forming the grooves 122, two types of profiles can be arranged in a point symmetry so as to face each other, so that the bumper beam 100 can be manufactured.

Hereinafter, this configuration will be described in more detail. Here, the reference symbol "P" is a profile having the same configuration as the first and second profiles P 'and P "used for manufacturing the bumper beam according to the present invention. In the drawings, the reference numerals for explaining the profile P will be described with reference to the reference numerals which are omitted from "" and "" ".

The first and second rim portions 110a and 110b form both edges of the profile P as shown in Figs. 2 and 3. At this time, the first and second rim portions 110a and 110b are formed by symmetrically pointing two first and second profiles P 'and P " The points of symmetry are formed so as to come in the same virtual plane so as to be in contact with each other when the bumper beam 100 is manufactured. Quot; refers to an ordinary technique to be obtained.

For this, the profile P is usually made of a steel sheet or the like, so that irregularities are repeatedly formed in the longitudinal direction of the steel sheet, and the both edges of the steel sheet are left to have a predetermined size to be used as the first and second rim portions 110a and 110b .

The first joining portion 120a and the second joining portion 120b are formed to be positioned between the first and second rim portions 110a and 110b as shown in Figs. 2 and 3. At this time, the first joint part 120a and the second joint part 120b are formed so as to protrude in the shape of a mountain so as to have a triangular structure to reinforce the structural rigidity of the bumper beam 100 desirable.

It is preferable that the first bonding portion 120a and the second bonding portion 120b are formed at positions corresponding to each other as shown in Fig. 2 and Fig. 3, respectively. That is, as shown in FIG. 4, when two first and second profiles P 'and P "having the same configuration and formed by one same width section are arranged facing each other in point symmetry, The first joining portion 120a and the second joining portion 120b are formed to have the same number of joining portions 120a 'and 120a' The first joining portion 120a and the second joining portion 120b are formed once and repeatedly. However, the present invention is not limited to this, The first bonding portion 120a and the second bonding portion 120b may be alternately repeatedly formed.

In the preferred embodiment of the present invention, the first bonding portion 120a has at least one protrusion 121 formed at the middle portion of the end portion as shown in FIGS. 2 and 3, and the second bonding portion The grooves 122 are preferably formed in a shape corresponding to the projections 121 as shown in FIGS. 2 and 3. This is because, when the first bonding portion 120a and the second bonding portion 120b are bonded in a contact manner, the external force can be easily broken due to the shearing force if it is applied parallel to the bonding surface or in a similar direction. Thus, according to the present invention, since the protrusions 121 are fitted in the grooves 122, the fastening force is applied even if an external force is applied to generate the shearing force, thereby preventing the joints from being broken easily.

In the preferred embodiment of the present invention, it is preferable that the first bonding portion 120a and the second bonding portion 120b have a curved end portion as shown in [Figure 2] to [Figure 4] . Even if an impact is applied to the profiles P 'and P "constituting the bumper beam 100, they are concentrated at the end portions thereof so as to support the profiles so as not to be damaged easily.

In the preferred embodiment of the present invention, it is preferable that at least one of the first bonding portion 120a and the second bonding portion 120b is formed in the same number as the first bonding portion 120a and the second bonding portion 120b. This is because, as described above, when the two profiles according to the present invention are arranged facing each other in point symmetry, the first bonding portion 120a and the second bonding portion 120b are bonded to each other, This is because the bumper beam can not be produced in one profile. In the figure, the first and second bonding portions 120a and 120b are formed in the most preferred embodiment.

The profile according to the present invention as described above can be manufactured by various methods. However, by adopting the roll forming method, it is possible to manufacture a desired length regardless of the length of the profile, and also to mass- have.

It is preferable that the profile according to the present invention is formed as a flat plate as a whole using a steel plate or the like, and the rim portion and the joining portion are formed so as to protrude in either direction so that the other surface of the profile is entirely planar.

(Manufacture of bumper beam)

The present invention includes the bumper beam 100 manufactured as shown in FIG. 4, using the profile thus formed. At this time, the bumper beam 100 is manufactured by disposing two first and second profiles P 'and P "having the above-described configuration in point symmetry and then facing each other.

That is, the first joining portion 120a 'of the first profile P' is brought into contact with the second joining portion 120b "of the second profile P" as shown in FIG. 4 (a) The two profiles P 'and P "are brought into contact with the second joining portion 120b' of the first profile P 'so as to contact the first joining portion 120a" of the second profile P " In this state, the contact portions are joined by a conventional technique of bonding the profiles when the bumper beam is manufactured, such as spot welding, fusion welding, and high-frequency heat treatment, in this state.

At this time, the first joining parts 120a 'and 120a' 'and the second joining parts 120b' and 120b '' are fitted in a concavo-convex shape so that the first joining parts 120a 'and 120a' Only the second rim portions 110b 'and 110b "may be bonded by a normal bonding method such as spot welding, welding, or high-frequency processing. This makes it possible to maintain the overall shape of the rim and securely fasten the joint so as to withstand external forces, and the joining portions of the joining portions are coupled to the concavo-convex shape, In order to be able to obtain. Of course, it does not matter if the first bonding portions 120a 'and 120a "and the second bonding portions 120b' and 120b" are fixed by a bonding method such as spot welding, fusion bonding and high frequency heat treatment while concave-

On the other hand, in the bumper beam according to the present invention, as shown in Figs. 2 and 3, in order to manufacture the profile P, the bumper beam is subjected to a softening treatment for a part (indicated by "A" . The softening treatment is a conventional heat treatment method for softening the steel material or improving the machinability. In the present invention, the softening treatment is first applied to a portion where deformation is applied when an external impact is applied, . This softening process can be softened to about 60% of the stiffness of the bumper beam, for example. That is, when the bumper beam produced according to the present invention has a strength of 1.7 GPa in a portion not subjected to the softening treatment, the softening portion softens at a strength of about 1 GPa.

The softening treatment may be performed over the entire length of the bent portion, but it is preferable to partially soften the portion where the first impact is expected when the external impact is applied or the first deformed portion when the external impact is applied .

Generally, when the bumper beam is formed in a profile formed by roll forming, it is difficult to partially change the stiffness and strength because the bumper beams have almost the same thickness. However, the bumper beam according to the present invention can be easily deformed The softened portion is relatively deformed compared with the portion having only the roll forming process so that the direction in which the shock absorption is performed is given So that the shock absorbing performance can be improved. Therefore, the present invention can improve the utilization of the roll forming process.

As described above, according to the present invention, since two types of profiles are arranged face to face with each other facing each other and then bonded together to produce a bumper beam, it is possible to produce a profile necessary for manufacturing a bumper beam, It is possible to reduce the investment cost of the facility and to produce only one kind of profile, which can increase the productivity.

In order to manufacture the bumper beam, since the portions to be joined with the two profiles are formed in a mountain shape, they are brought into contact with each other in a curved shape instead of a plane, so that even when an external force is applied to the joint portion, So that the shock absorbing effect can be enhanced.

[Embodiment 2] according to the present invention is different from Embodiment 1 in that the projections 112 are formed on the first and second rim portions 110a and 110b when the profile Pa is produced, And the grooves 111 are added to the grooves. Here, the same reference numerals are used for the same components as those of the profile described in [Embodiment 1], and a detailed description thereof will be omitted and only the configuration added to the frame portion will be described.

[Embodiment 2] As shown in Fig. 5, a groove 112 is formed in the first rim portion 110a and a projection 111 inserted in the groove 112 is formed in the second rim portion 110b. . Since the protrusions 111 and the grooves 112 have the same function as those of the first and second bonding portions 120a and 120b, detailed description thereof will be omitted here.

100: Bumper beam
110a, 110b:
120a: first bonding portion
120b: second joint portion

Claims (7)

The first joining portion 120a and the second joining portion 120b, which are formed in a mountain shape by bending in a concave-convex shape between the first and second rim portions 110a and 110b formed by folding at least twice round, Wherein the first and second profiles (P ', P ") formed so as to protrude one by one are arranged to face each other in point symmetry,
The first and second profiles P ' and P "have the same predetermined cross-sectional shape,
The first and second rim portions 110a and 110b are formed to be outwardly bent so as to be opposite to each other,
At least one protrusion 121 protrudes from the first joining portion 120a at a central portion of the first joining portion 120a and the second joining portion 120b is joined to the first joining portion 120a, And a groove 122 having the same shape as that of the projection 121 is formed in the portion 120b so that when the bumper beam is manufactured, the projection 121 and the groove 122 are in contact with each other, .
The method according to claim 1,
The first and second profiles (P ', P "),
Wherein the bumper beam is formed by a roll forming process.
The method according to claim 1,
The first and second profiles P 'and P "
Wherein the first joining portion (120a) and the second joining portion (120b) are formed one by one, respectively.
The method according to claim 1,
The first and second profiles P 'and P "
The surface forming the outer surface of the automotive bumper beam is flattened as a whole,
Wherein the first and second rim portions (110a, 110b), the first joint portion (120a) and the second joint portion (120b) are formed so as to protrude to one side.
The method according to claim 1,
The first and second bonding portions 120a,
Wherein the bumper beam is formed to be narrower toward the outside.
The method according to claim 1,
The protrusion 112 is formed in the first rim portion 110a and the groove 111 is formed in the second rim portion 110b,
And the projections (112) and the grooves (111) are overlapped and joined to each other when the bumper beams are arranged in point symmetry.
7. The method according to any one of claims 1 to 6,
The bumper beam for an automobile includes:
Characterized in that at least some sections of the bent portions of the profiles (P ', P ") are partly softened.
KR1020160008158A 2016-01-22 2016-01-22 Bumper beam for vehicle KR101746557B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190123907A (en) 2018-04-25 2019-11-04 주식회사 새한산업 Apparatus for heat treating and laser welding

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100786014B1 (en) * 2006-10-24 2007-12-14 한일이화주식회사 Impact pad for vehicle door
JP2015199406A (en) 2014-04-07 2015-11-12 マツダ株式会社 frame structure for vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100786014B1 (en) * 2006-10-24 2007-12-14 한일이화주식회사 Impact pad for vehicle door
JP2015199406A (en) 2014-04-07 2015-11-12 マツダ株式会社 frame structure for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190123907A (en) 2018-04-25 2019-11-04 주식회사 새한산업 Apparatus for heat treating and laser welding

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