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KR100870413B1 - Bumper Beam Unit for Vehicle - Google Patents

Bumper Beam Unit for Vehicle Download PDF

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Publication number
KR100870413B1
KR100870413B1 KR1020070060127A KR20070060127A KR100870413B1 KR 100870413 B1 KR100870413 B1 KR 100870413B1 KR 1020070060127 A KR1020070060127 A KR 1020070060127A KR 20070060127 A KR20070060127 A KR 20070060127A KR 100870413 B1 KR100870413 B1 KR 100870413B1
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KR
South Korea
Prior art keywords
bumper beam
vehicle
beam unit
present
cross
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Expired - Fee Related
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KR1020070060127A
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Korean (ko)
Inventor
이문용
유정수
김도현
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주식회사 성우하이텍
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Priority to KR1020070060127A priority Critical patent/KR100870413B1/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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/028—Reinforcing the connection otherwise than by deforming, e.g. welding
    • 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
    • B60R19/023—Details
    • 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
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames
    • 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
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • 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
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • 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
    • B60R2019/1893—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 comprising a multiplicity of identical adjacent shock-absorbing means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

본 발명은 범퍼빔의 내단면 길이방향을 따라 격막형 보강막을 충격하중이 전달되는 방향에 직접적으로 반발하는 범퍼빔의 폭방향으로 적소에 적용함으로써 중량을 최소화하면서도 범퍼빔의 구조적 안정성을 높여 전체적인 강성을 증대시킬 수 있도록 하는 차량용 범퍼빔 유닛을 제공한다.The present invention is applied to the diaphragm reinforcement film along the longitudinal direction of the inner surface of the bumper beam in place in the width direction of the bumper beam directly repulsing in the direction of the impact load transfer to increase the structural stability of the bumper beam while minimizing weight It provides a bumper beam unit for a vehicle that can increase the.

Description

차량용 범퍼빔 유닛{A BUMPER BEAM UNIT FOR VEHICLES}Bumper Beam Unit for Vehicles {A BUMPER BEAM UNIT FOR VEHICLES}

도 1은 종래 기술에 따른 차량용 범퍼빔 유닛의 분리 사시도이다.1 is an exploded perspective view of a vehicle bumper beam unit according to the prior art.

도 2는 본 발명의 실시예에 따른 차량용 범퍼빔 유닛의 분해 사시도이다.2 is an exploded perspective view of a vehicle bumper beam unit according to an exemplary embodiment of the present invention.

도 3은 본 발명의 실시예에 따른 차량용 범퍼빔 유닛의 부분 내면 사시도이다.3 is a partial internal perspective view of a vehicle bumper beam unit according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 따른 차량용 범퍼빔 유닛에 적용되는 보강막의 사시도이다.4 is a perspective view of a reinforcing film applied to a bumper beam unit for a vehicle according to an exemplary embodiment of the present invention.

도 5는 본 발명의 실시예에 따른 차량용 범퍼빔 유닛에 적용된 상태의 보강막의 사시도이다.5 is a perspective view of the reinforcing film in a state applied to the bumper beam unit for a vehicle according to the embodiment of the present invention.

도 6A는 종래 기술에 따른 차량용 범퍼빔 유닛의 정면 충돌시의 응력 분포도이고, 도 6B는 본 발명의 실시예에 따른 차량용 범퍼빔 유닛의 정면 충돌시의 응력 분포도이다.6A is a stress distribution diagram during frontal collision of a vehicle bumper beam unit according to the prior art, and FIG. 6B is a stress distribution diagram during frontal collision of a vehicle bumper beam unit according to an embodiment of the present invention.

도 7은 본 발명에 대한 범퍼빔 유닛의 충돌시험에서 변위량 비교시의 개념을 설명을 하기 위한 변위량의 개념 설명도이다.7 is a conceptual explanatory diagram of the displacement amount for explaining the concept of the displacement amount comparison in the bump test of the bumper beam unit according to the present invention.

도 8과 도 9는 본 발명과 종래 기술의 범퍼 충돌 시험에서, 각부 변위량의 비교 그래프이다. 8 and 9 are graphs for comparing the displacement amount of each part in the bumper collision test of the present invention and the prior art.

도 10은 본 발명과 종래 기술의 범퍼 충돌 시험에서, 충격량(하중)에 대한 반응의 비교 그래프이다. 10 is a comparative graph of the response to the amount of impact (load) in the bumper collision test of the present invention and the prior art.

본 발명은 차량용 범퍼빔 유닛에 관한 것으로서, 보다 상세하게는 범퍼빔의 내단면 길이방향을 따라 격막형 보강막을 범퍼빔의 폭방향으로 적소에 적용함으로써 중량을 최소화하면서도 범퍼빔의 구조적 안정성을 높이는 차량용 범퍼빔 유닛에 관한 것이다. The present invention relates to a vehicle bumper beam unit, and more particularly, to increase the structural stability of a bumper beam by minimizing weight by applying a diaphragm-type reinforcement film in place in the width direction of the bumper beam along the longitudinal cross-sectional direction of the bumper beam. A bumper beam unit.

일반적으로 차량의 범퍼빔 유닛은 차량의 저속 충돌 시, 탄성적으로 변형하여 차체의 물리적 손상을 최소화하며, 다른 차량이나 고정체와의 충돌 시, 그 충격력을 흡수하여 승차자의 안전을 도모할 수 있도록 차량의 전,후방에 설치되는 완충장치이다.In general, a bumper beam unit of a vehicle is elastically deformed at a low speed collision of the vehicle to minimize physical damage to the vehicle body, and in the event of a collision with another vehicle or a fixed body, absorbs the impact force to promote the safety of the rider. It is a shock absorber installed at the front and rear of the vehicle.

이러한 차량용 범퍼빔 유닛은, 도 1에서 도시한 바와 같이, 차량의 전,후방에서 차폭방향으로 배치되는 범퍼빔(101)과, 상기 범퍼빔(101)과 프런트 사이드 멤버(미도시)를 상호 연결하기 위한 양측 스테이 패널(103) 및 마운팅 브라켓(105)으로 이루어지는 스테이(107)로 구성된다.As shown in FIG. 1, the vehicle bumper beam unit includes a bumper beam 101 disposed in the vehicle width direction from the front and rear of the vehicle, and the bumper beam 101 and the front side member (not shown). It consists of a stay 107 consisting of both side panel 103 and the mounting bracket 105 for the purpose.

따라서 상기한 차량용 범퍼빔 유닛은 차량의 충돌시에 미시된 에너지 업소버가 압축되면서 충돌에너지를 일부 흡수하며, 상기 에너지 업소버에서 흡수되지 못한 나머지 충돌에너지는 그 후방의 범퍼빔(101)과 스테이(107)를 통하여 차체로 분산되어 흡수된다.Therefore, the vehicle bumper beam unit absorbs some of the collision energy while the microscopic energy absorber is compressed during the collision of the vehicle, and the remaining collision energy that is not absorbed by the energy absorber is the bumper beam 101 and the stay 107 at the rear thereof. It is dispersed and absorbed into the vehicle body through).

그런데 상기한 범퍼빔(101)과 같은 직선타입의 빔류는 최근에 롤 포밍 성형에 의해 제작되는 추세이며, 특히, 이러한 롤 포밍 성형에 의해 제작된 범퍼빔(101)은 그 구조적 단일성으로 인하여 특정부위의 굽힘 강성을 보강하고자 하는 경우에 범퍼빔(101)의 내부 혹은 외부 단면에 비교적 중량이 많이 나가는 면적형 보강부재를 적용하였다. By the way, the beam type of the straight type such as the bumper beam 101 has been recently produced by roll forming molding, and in particular, the bumper beam 101 manufactured by such roll forming molding has a specific portion due to its structural unity. In the case of reinforcing the bending stiffness of the bumper beam 101, an area-type reinforcing member having a relatively heavy weight was applied to the inner or outer cross section.

그러나 상기와 같이, 범퍼빔(101)의 특정부위 강성을 보강하기 위하여 면적형 보강부재를 적용함에 따라 범퍼빔(101)의 중량을 증가시키게 됨에도 불구하고, 구조적으로 효율적인 강성증대를 유도하기엔 한계가 있다. However, as described above, although the weight of the bumper beam 101 is increased by applying the area type reinforcing member to reinforce the rigidity of the specific portion of the bumper beam 101, there is a limit to inducing structurally efficient rigidity increase. have.

즉, 단순한 C형 단면을 갖는 범퍼빔(101)의 경우에는 그 재질의 강도와 단면의 구조적 강성에 의해 충격에 저항하게 되는데, 궁극적으로 재질의 항복응력 이상의 상황에서 단면은 최초 변형을 일으키게 되고, 이때 발생된 저항하중은 해당 범퍼빔의 특성을 결정짓게 된다. That is, in the case of the bumper beam 101 having a simple C-shaped cross section, the material is resistant to impact due to the strength of the material and the structural stiffness of the cross section. Ultimately, the cross section causes an initial deformation in a situation above the yield stress of the material. The resistance load generated at this time determines the characteristics of the bumper beam.

이러한 견지에서 상기한 범퍼빔(101)의 저항 응력값을 높이기 위해서는 현재 범퍼빔에 적용된 강도 이상의 소재를 적용하거나, 구조적으로 범퍼빔의 단면형상을 유지하여 충돌하중에 반대방향으로 저항하도록 최소 중량의 보강막을 설치하는 방법이 있을 것이다. In view of the above, in order to increase the resistive stress value of the bumper beam 101, a material having a strength greater than that applied to the current bumper beam may be applied, or structurally, the cross-section of the bumper beam may be maintained to resist the impact load in the opposite direction. There may be a way to install the reinforcement film.

따라서 본 발명은 상기한 바와 같이 구조적으로 범퍼빔의 강성을 향상시키기 위하여 발명된 것으로, 본 발명의 목적은 범퍼빔의 내단면 길이방향을 따라 격막형 보강막을 충격하중이 전달되는 방향에 직접적으로 반발하는 범퍼빔의 폭방향으로 적소에 적용함으로써 중량을 최소화하면서도 범퍼빔의 구조적 안정성을 높여 전체적인 강성을 증대시킬 수 있도록 하는 차량용 범퍼빔 유닛을 제공하는 것이다.Therefore, the present invention is invented to improve the rigidity of the bumper beam structurally as described above, an object of the present invention is to directly repel the diaphragm-type reinforcement film along the longitudinal direction of the inner surface of the bumper beam in the direction in which the impact load is transmitted. It is to provide a bumper beam unit for a vehicle that can increase the overall rigidity by increasing the structural stability of the bumper beam while minimizing the weight by applying it in place in the width direction of the bumper beam.

상기한 바와 같은 목적을 실현하기 위한 본 발명의 차량용 범퍼빔 유닛은 차량의 전,후방에서 차폭방향으로 배치되는 범퍼빔과, 상기 범퍼빔과 프런트 사이드 멤버를 상호 연결하도록 스테이 패널 및 마운팅 브라켓으로 구성되는 양측 스테이를 포함하며, 상기 범퍼빔의 내단면에는 그 길이방향 단면을 따라 다수의 개소에 장착되는 격막형 보강막을 포함하는 차량용 범퍼빔 유닛에서,The vehicle bumper beam unit of the present invention for realizing the above object comprises a bumper beam disposed in the vehicle width direction from the front and rear of the vehicle, and a stay panel and a mounting bracket to interconnect the bumper beam and the front side member. In the bumper beam unit for a vehicle comprising a two-side stay, the inner end surface of the bumper beam including a diaphragm-type reinforcement film mounted in a plurality of places along the longitudinal section thereof,

삭제delete

상기한 격막형 보강막은 중앙에 "V"자 형상의 단면으로 형성되는 지지부; 상기 지지부의 양측단을 따라 연장 절곡 형성되어 상기 범퍼빔의 내단면에 용접되는 날개부로 이루어진다.The diaphragm-type reinforcement film may include a support formed at a center in a cross section having a “V” shape; It is formed extending bent along both ends of the support portion is made of a wing portion welded to the inner end surface of the bumper beam.

여기서, 상기 지지부는 상기 범퍼빔의 내단면에 대하여 범퍼빔의 폭방향으로 배치되어 설치되며, 상기 날개부는 상기 범퍼빔의 내단면 형상과 동일한 단면 형상으로 형성되어 버퍼빔의 내단면에 접착된 상태로 용접되는 것을 특징으로 한다.Here, the support portion is disposed in the width direction of the bumper beam with respect to the inner end surface of the bumper beam, the wing portion is formed in the same cross-sectional shape as the inner cross-sectional shape of the bumper beam is bonded to the inner end surface of the buffer beam It characterized in that the welding.

이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조로 상세하게 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail as follows.

도 2는 본 발명의 실시예에 따른 차량용 범퍼빔 유닛의 분해 사시도이고, 도 3은 본 발명의 실시예에 따른 차량용 범퍼빔 유닛의 부분 내면 사시도이며, 도 4와 도 5는 본 발명의 실시예에 따른 차량용 범퍼빔 유닛에 적용되는 보강막의 사시도 및 조립 사시도이다.2 is an exploded perspective view of a vehicle bumper beam unit according to an embodiment of the present invention, Figure 3 is a partial inner perspective view of the vehicle bumper beam unit according to an embodiment of the present invention, Figures 4 and 5 are embodiments of the present invention Perspective and assembly perspective view of the reinforcing film applied to the vehicle bumper beam unit according to the present invention.

본 실시예에 따른 차량용 범퍼빔 유닛의 구성은, 도 2에서 도시한 바와 같이, 차량의 전,후방에서 차폭방향으로 배치되는 범퍼빔(1)과, 상기 범퍼빔(1)과 프런트 사이드 멤버(미도시)를 상호 연결하기 위한 양측 스테이 패널(3) 및 마운팅 브라켓(5)으로 이루어지는 스테이(7)로 구성된다.As illustrated in FIG. 2, the bumper beam unit for a vehicle according to the present embodiment includes a bumper beam 1 disposed in a vehicle width direction from the front and the rear of the vehicle, and the bumper beam 1 and the front side member ( It consists of a stay (7) consisting of two side stay panel (3) and a mounting bracket (5) for interconnecting each other.

그리고 상기 범퍼빔(1)의 내단면에는, 도 3에서 도시한 바와 같이, 그 길이방향 단면을 따라 다수의 개소에 격막형 보강막(9)을 용접하여 구성한다.3, the diaphragm-type reinforcement film 9 is welded to the inner end surface of the bumper beam 1 in many places along the longitudinal direction cross section.

상기 격막형 보강막(9)은, 도 4에서 도시한 바와 같이, 중앙에 "V"자 형상의 단면으로 이루어진 지지부(11)를 형성하고, 상기 지지부(11)의 양측단을 따라서는 연장되어 평행하게 절곡된 상태로 이루어져 상기 범퍼빔(1)의 내단면에 용접되는 양측의 날개부(13)로 형성된다. As shown in FIG. 4, the diaphragm-type reinforcement film 9 forms a support part 11 having a “V” shaped cross section at the center thereof and extends along both ends of the support part 11. It is formed in a state bent in parallel to form a wing portion 13 of both sides welded to the inner end surface of the bumper beam (1).

여기서, 상기 지지부(11)는, 도 5에서 도시한 바와 같이, 상기 범퍼빔(1)의 내단면에 대하여 범퍼빔(1)의 폭방향으로 배치되어 설치되며, 상기 양측의 날개부(13)는 상기 범퍼빔(1)의 내단면 형상과 동일한 단면 형상으로 형성되어 범퍼빔(1)의 내단면에 완전히 접착된 상태로 용접되어 설치된다.Here, as shown in FIG. 5, the supporting portion 11 is disposed in the width direction of the bumper beam 1 with respect to the inner end surface of the bumper beam 1, and the wing portions 13 on both sides thereof. Is formed in the same cross-sectional shape as the inner cross-sectional shape of the bumper beam (1) is welded and installed in a state that is completely bonded to the inner end surface of the bumper beam (1).

즉, 상기한 격막형 보강막(9)은 C형의 오픈(OPEN) 단면으로 이루어지는 범퍼빔(1)의 내부에 경량으로 적용되어 충격하중이 전달되는 방향에 직접적으로 반발하는 범퍼빔(1)의 폭방향으로 장착됨으로써 중량을 최소화하면서도 범퍼빔(1)의 구조적 안정성을 높여 전체적인 강성을 증대시킨다. 이는 범퍼빔(1)의 중량 증가를 최 소화하면서도 충격에 대한 범퍼빔 단면의 조기함몰을 억제하게 되는 것이다. That is, the above-mentioned diaphragm type reinforcement film 9 is lightly applied to the inside of the bumper beam 1 having the C-type open cross section so that the bumper beam 1 directly rebounds in the direction in which the impact load is transmitted. By mounting in the width direction of the bumper beam (1) while increasing the structural stability while minimizing the weight increases the overall rigidity. This minimizes the weight increase of the bumper beam 1 while suppressing premature depression of the bumper beam cross section to impact.

상기한 바와 같은 구성을 갖는 차량용 범퍼빔 유닛은 배리어(BARRIER) 충돌시험을 통하여 다음과 같은 충돌 해석 결과를 갖는다.The bumper beam unit for a vehicle having the above configuration has the following collision analysis result through a barrier collision test.

즉, 충돌 해석은 시험조건으로 차량 중량을 1,000Kg, 충돌속도를 2.7MPH로 하여 종래 차량용 범퍼빔 유닛과 본 실시예에 따른 차량용 범퍼빔 유닛의 응력 분포, 변위량 비교, 충격량(하중)에 대한 반응 비교의 3가지 측면에서 해석된다.That is, the collision analysis is a test condition of the vehicle weight of 1,000kg and the collision speed of 2.7MPH stress distribution, displacement comparison, impact amount (load) of the conventional bumper beam unit and the vehicle bumper beam unit according to the present embodiment Interpreted in three aspects of comparison.

먼저, 응력 분포의 경우, 도 6A는 종래 기술에 따른 범퍼빔 유닛의 정면 충돌시의 응력 분포를 나타내고, 도 6B는 본 발명의 실시예에 따른 범퍼빔 유닛의 정면 충돌시의 응력 분포를 나타내고 있다. First, in the case of the stress distribution, FIG. 6A shows the stress distribution during the frontal collision of the bumper beam unit according to the prior art, and FIG. 6B shows the stress distribution during the frontal collision of the bumper beam unit according to the embodiment of the present invention. .

즉, 도 6A의 종래 기술과 도 6B의 본 발명의 차량용 범퍼빔 유닛에 대한 응력 분포 상, 본 발명의 범퍼빔 유닛이 중앙부를 기점으로 푸른색으로 표시되는 응력이 덜 발생된 영역이 많은 것을 확인할 수 있다.That is, the stress distribution of the bumper beam unit for the vehicle of the present invention of FIG. 6A and the present invention of FIG. 6B confirms that there are many areas where stress is less generated in the bumper beam unit of the present invention, which is indicated in blue from the center. Can be.

이는 본 실시예의 범퍼빔(1)이 종래에 비하여 그 구조 강성의 증대에 따른 변형량이 적어 상대적으로 응력 집중 현상이 낮기 때문이며, 이는 더 많은 충돌에너지를 흡수할 수 있음을 의미한다.This is because the bumper beam 1 of the present embodiment has a smaller amount of deformation due to an increase in its structural rigidity and a lower stress concentration phenomenon than the conventional one, which means that more collision energy can be absorbed.

그리고 상기 변위량 비교는 인트루젼(Intrusion) 변위량과 디플렉션(Deflection) 변위량으로 구분되는데, 상기 인트루젼 변위량은, 도 7에서 도시한 바와 같이, 충돌 시 범퍼빔(1)의 전면측 중앙부(S1)가 측정 포인트가 되며, 여기서부터 충돌방향으로의 최대 변형량으로 충돌시험 후 빔이 밀고 들어가 차량의 외부적으로 상관 파트의 변형에 영향을 주는 구간에서의 변형을 말하며, 상기 디플렉션 변위량은 충돌시 범퍼빔(1)의 배면측 중앙부(S2)가 측정 포인트가 되며, 여기서부터 충돌방향으로의 최대 변형량으로 충돌시험 후 빔의 내부적 침입 허용구간에서의 변형을 말한다.In addition, the displacement comparison is divided into an intrusion displacement and a deflection displacement amount. The displacement displacement amount is, as illustrated in FIG. 7, the front side central portion S1 of the bumper beam 1 during a collision. Is the measurement point, and from this point, the maximum deformation in the direction of impact is the deformation in the section where the beam pushes in after impact test and affects the deformation of the correlated part externally of the vehicle. The back side central part S2 of the beam 1 becomes a measurement point, and it means the deformation in the internal penetration tolerance area of a beam after a collision test by the maximum deformation amount in a collision direction from this.

결론적으로 두 요소(factor) 모두 변형량으로 표시하고, 실제 충돌 시험시에도 동일한 조건으로 측정하며, 두 요소(factor)가 모두 고강도 재료 혹은 고강성 구조에서는 적게 밀려들어가는 것이 우수한 범퍼빔이라 할 수 있다.In conclusion, both factors are expressed as deformation, measured under the same conditions in the actual crash test, and both factors are less likely to be pushed in the high-strength material or the high-rigidity structure.

도 8과 도 9는 본 발명과 종래 기술의 범퍼 충돌 시험에서, 각부 변위량의 비교 그래프이다. 8 and 9 are graphs for comparing the displacement amount of each part in the bumper collision test of the present invention and the prior art.

즉, 상기 변위량 비교에 있어서는, 도 8과 도 9에서 도시한 바와 같이, 본 발명의 범퍼빔 유닛은 종래 범퍼빔 유닛에 비하여 인트루젼 변위량과 디플렉션 변위량이 모두 작게 나타남을 알 수 있으며, 이는 본 발명의 범퍼빔 유닛의 충격흡수성능이 더 우수함을 짐작할 수 있다. That is, in the comparison of the displacement amount, as shown in Figure 8 and 9, the bumper beam unit of the present invention can be seen that both the amount of displacement displacement and deflection displacement is smaller than the conventional bumper beam unit, which is It can be guessed that the shock absorbing performance of the bumper beam unit of the invention is better.

도 10은 본 발명과 종래 기술의 범퍼 충돌 시험에서, 충격량(하중)에 대한 반응의 비교 그래프이다. 10 is a comparative graph of the response to the amount of impact (load) in the bumper collision test of the present invention and the prior art.

한편, 충격량(하중)에 대한 반응의 비교에서는, 도 10서 도시한 바와 같이, 본 발명의 범퍼빔(1)과 종래 범퍼빔(101)의 고정벽 충돌 시, 각 범퍼빔에서 발생되는 최대(충돌) 하중을 나타낸 것으로, 본 발명이 0.53ton 더 높게 나타났으며, 항복(빔의 충돌시 최초 변형)하중 또한 종래의 경우 1.7ton인 반면, 본 발명은 2.2ton으로 나타나 실질적으로 변형에 저항하는 정도가 본 발명의 범퍼빔(1)이 더 높은 것으로 나타났다.On the other hand, in the comparison of the response to the impact amount (load), as shown in Fig. 10, when the fixed wall collision between the bumper beam 1 of the present invention and the conventional bumper beam 101, Impingement) load, the invention exhibited 0.53 tons higher, and the yield (first strain upon impact of the beam) load was also 1.7 tons in the prior art, while the invention exhibited 2.2 tons to substantially resist deformation. The degree was found to be higher for the bumper beam 1 of the present invention.

그리고 도 10의 그래프 상에서 점선영역(P)에 있어서는, 항복하중을 지나 최대하중, 및 변형이 완료되어 하중이 급격히 떨어질 때까지, 본 발명의 범퍼빔(1)은 종래 범퍼빔(101)에 비하여 변형이 진행될수록 발생하는 저항하중이 증가하여 궁극적으로 변형을 저지하여 단면형상을 최대한 유지하려는 경향이 뚜렷이 나타남을 알 수 있다.In the dotted line area P on the graph of FIG. 10, the bumper beam 1 of the present invention is compared with the conventional bumper beam 101 until the maximum load after the yield load and the deformation are completed and the load drops sharply. As the deformation progresses, the resistance load generated increases, ultimately, the tendency to ultimately maintain the cross-sectional shape by preventing the deformation is apparent.

이상에서 설명한 바와 같이, 본 발명에 따른 차량용 범퍼빔 유닛에 의하면, 범퍼빔의 내단면 길이방향을 따라 격막형 보강막을 충격하중이 전달되는 방향에 직접적으로 반발하는 범퍼빔의 폭방향으로 적소에 적용함으로써 중량을 최소화하면서도 범퍼빔의 구조적 안정성을 높여 전체적인 강성을 증대시킬 수 있도록 하는 효과가 있다.As described above, according to the vehicle bumper beam unit according to the present invention, the diaphragm-type reinforcement film is applied in the width direction of the bumper beam that directly repels the direction in which the impact load is transmitted along the longitudinal cross-sectional direction of the bumper beam. By increasing the structural stability of the bumper beam while minimizing the weight, there is an effect to increase the overall rigidity.

즉, 종래의 면적형 보강부재를 배제하고 경량의 격막형 보강막을 적용함에 따른 중량 절감 및 원가 절감 효과가 기대된다.That is, weight reduction and cost reduction effect are expected by applying a lightweight diaphragm type reinforcement membrane without removing the area-type reinforcement member.

Claims (4)

삭제delete 차량의 전,후방에서 차폭방향으로 배치되는 범퍼빔과, 상기 범퍼빔과 프런트 사이드 멤버를 상호 연결하도록 스테이 패널 및 마운팅 브라켓으로 구성되는 양측 스테이를 포함하며, 상기 범퍼빔의 내단면에는 그 길이방향 단면을 따라 다수의 개소에 장착되는 격막형 보강막을 포함하는 차량용 범퍼빔 유닛에서, A bumper beam disposed in the vehicle width direction at the front and rear of the vehicle, and both sides composed of a stay panel and a mounting bracket for interconnecting the bumper beam and the front side member, wherein the inner surface of the bumper beam has a longitudinal direction thereof; In a vehicle bumper beam unit including a diaphragm-type reinforcement film mounted at a plurality of places along the cross section, 상기 격막형 보강막은 The diaphragm reinforcement film is 중앙에 "V"자 형상의 단면으로 형성되는 지지부;Support portion formed in the center of the "V" shaped cross section; 상기 지지부의 양측단을 따라 연장 절곡 형성되어 상기 범퍼빔의 내단면에 용접되는 날개부로 이루어지는 것을 특징으로 하는 차량용 범퍼빔 유닛.The bumper beam unit for a vehicle, characterized in that the blade is formed extending extending along both ends of the support welded to the inner end surface of the bumper beam. 삭제delete 제2항에 있어서, The method of claim 2, 상기 날개부는 The wing 상기 범퍼빔의 내단면 형상과 동일한 단면 형상으로 형성되어 범퍼빔의 내단면에 접착된 상태로 용접되는 것을 특징으로 하는 차량용 범퍼빔 유닛.A bumper beam unit for a vehicle, characterized in that formed in the same cross-sectional shape as the inner cross-sectional shape of the bumper beam and welded to the inner end surface of the bumper beam.
KR1020070060127A 2007-06-19 2007-06-19 Bumper Beam Unit for Vehicle Expired - Fee Related KR100870413B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011057103A3 (en) * 2009-11-06 2011-10-20 Shape Corp. Energy absorber with lobes providing uniform pedestrian impact
CN104228725A (en) * 2013-06-21 2014-12-24 铃木株式会社 Vehicle front structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082465A (en) * 1983-10-14 1985-05-10 Nissan Motor Co Ltd Bamper side fixing section structure
US5829805A (en) * 1997-01-28 1998-11-03 General Motors Corporation Welded on serviceable bumper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082465A (en) * 1983-10-14 1985-05-10 Nissan Motor Co Ltd Bamper side fixing section structure
US5829805A (en) * 1997-01-28 1998-11-03 General Motors Corporation Welded on serviceable bumper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011057103A3 (en) * 2009-11-06 2011-10-20 Shape Corp. Energy absorber with lobes providing uniform pedestrian impact
US8196979B2 (en) 2009-11-06 2012-06-12 Shape Corp. Energy absorber with lobes providing uniform pedestrian impact
CN104228725A (en) * 2013-06-21 2014-12-24 铃木株式会社 Vehicle front structure

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