KR101026962B1 - Production method of bumper beam - Google Patents

Production method of bumper beam Download PDF

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Publication number
KR101026962B1
KR101026962B1 KR1020080133766A KR20080133766A KR101026962B1 KR 101026962 B1 KR101026962 B1 KR 101026962B1 KR 1020080133766 A KR1020080133766 A KR 1020080133766A KR 20080133766 A KR20080133766 A KR 20080133766A KR 101026962 B1 KR101026962 B1 KR 101026962B1
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South Korea
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bumper beam
carbon fiber
fiber reinforced
reinforced resin
resin layer
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KR1020080133766A
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Korean (ko)
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KR20100075142A (en
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이문용
이영주
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주식회사 성우하이텍
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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
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0872—Prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement
    • B29K2307/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3044—Bumpers

Abstract

기존 범퍼빔 대비 두께가 얇은 강판의 전면에 탄소섬유 강화수지를 다수매 적층한 상태로 내부에 히팅코일을 갖는 프레스를 통하여 범퍼빔의 형상으로 가압 성형 및 열 융착을 순차적으로 진행하여 경량화 및 충돌 성능이 우수한 탄소섬유 강화수지층을 갖는 범퍼빔을 성형하는 차량용 범퍼빔 제조방법을 제공한다.Light weight and impact performance by sequentially pressing molding and thermal fusion into the shape of bumper beam through the press with heating coil inside while stacking a large number of carbon fiber reinforced resin on the front side of steel plate which is thinner than conventional bumper beam. Provided is a vehicle bumper beam manufacturing method for forming a bumper beam having the excellent carbon fiber reinforced resin layer.

범퍼빔, CFRP, 수지층, 탄소섬유 강화수지 Bumper Beam, CFRP, Resin Layer, Carbon Fiber Reinforced Resin

Description

차량용 범퍼빔 제조방법{PRODUCTION METHOD OF BUMPER BEAM}Method for manufacturing bumper beam for vehicle {PRODUCTION METHOD OF BUMPER BEAM}

본 발명은 차량용 범퍼빔 제조방법에 관한 것으로서, 보다 상세하게는 기존의 범퍼빔 대비 두께가 얇은 강판의 전면에 탄소섬유 강화수지를 다수매 적층한 상태로 프레스 내에서 범퍼빔의 형상으로 가압 성형 및 열 융착 성형을 통하여 경량화 및 충돌 성능이 우수한 범퍼빔을 성형하는 차량용 범퍼빔 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a bumper beam for a vehicle, and more particularly, press-molding and forming a bumper beam in a press in a state in which a plurality of carbon fiber reinforced resins are laminated on a front surface of a steel sheet thinner than a conventional bumper beam. The present invention relates to a vehicle bumper beam manufacturing method for forming a bumper beam having excellent weight and impact performance through thermal fusion molding.

일반적으로 차량에서의 범퍼는 자동차가 다른 자동차나 고정체와의 충돌시, 그 충격을 흡수하여 승차자의 안전을 도모하며, 동시에 차체의 변형을 최소화 할 수 있도록 자동차의 전,후 단부의 소정 부위에 배치되는 완충유닛이다.In general, a bumper in a vehicle absorbs an impact when a vehicle collides with another vehicle or a fixed body to promote the safety of the occupant, and at the same time, a predetermined portion of the front and rear ends of the vehicle can be minimized to minimize deformation of the vehicle body. The buffer unit is arranged.

도 1에서 도시한 바와 같이, 상기한 범퍼(100)는 차량의 전,후방에서 차폭 방향으로 배치되는 범퍼빔(101)의 후방 양측에 스테이(103)가 장착되어 크래쉬 박스(111) 등을 통하여 차체측 사이드 멤버(113)에 고정되는 범퍼빔 유닛(105)과, 상기 범퍼빔(101)의 전방에 배치되어 충격력을 흡수하는 에너지 업소버(107), 그리고 상기 범퍼빔(101)과 에너지 업소버(107)를 감싸는 범퍼 커버(109)로 이루어진다.As shown in FIG. 1, the bumper 100 has a stay 103 mounted on both rear sides of the bumper beam 101 disposed in the vehicle width direction from the front and the rear of the vehicle, and through the crash box 111. A bumper beam unit 105 fixed to the vehicle body side member 113, an energy absorber 107 disposed in front of the bumper beam 101 to absorb impact force, and the bumper beam 101 and an energy absorber ( And a bumper cover 109 that encloses 107.

여기서, 상기한 종래의 범퍼빔 유닛(105)은, 도 2에서 도시한 바와 같이, 롤 포밍 성형되는 2장의 범퍼 레일(121,123)이 상호 용접되어 범퍼빔(101)을 형성하고, 상기 범퍼빔(101)의 전면 중앙에는 일정길이의 보강 플레이트(125)가 용접된다. Here, in the conventional bumper beam unit 105, as illustrated in FIG. 2, two bumper rails 121 and 123 which are roll-formed are welded to each other to form a bumper beam 101, and the bumper beam ( The reinforcing plate 125 of a predetermined length is welded to the front center of the 101.

또한, 상기 범퍼빔(101)의 후면 양단부에는 각각 스테이(103)가 용접되며, 상기 각 스테이(103)는 플랜지(127)을 통하여 각 크래쉬 박스(111)에 조립되어 사이드 멤버(113)에 설치된다. In addition, the stay 103 is welded to both ends of the rear surface of the bumper beam 101, and each stay 103 is assembled to each crash box 111 through the flange 127 and installed on the side member 113. do.

특히, 상기한 범퍼빔(101)은 전면에 충격 에너지가 가해지면, 자체 강도에 의해 어느 정도의 충격 에너지를 흡수할 수 있도록 통상 1.2mm 내지 1.4mm 정도의 두께를 갖는 강판을 적용한다.In particular, when the impact energy is applied to the front surface of the bumper beam 101, a steel sheet having a thickness of about 1.2 mm to 1.4 mm is generally applied to absorb some impact energy by its own strength.

이와 같이, 종래의 범퍼빔(101)은 자체 강성을 보강하기 위하여 강판의 두께를 두껍게 하거나, 상기한 바와 같이 중앙에 보강 플레이트(125)를 구성하는 등, 중량 증가가 불가피한 문제점이 있었다.As such, the conventional bumper beam 101 has a problem in that weight increase is inevitable, such as increasing the thickness of the steel sheet in order to reinforce its rigidity, or forming a reinforcing plate 125 in the center as described above.

따라서 본 발명은 상기한 바와 같은 종래의 문제점을 해소하기 위하여 발명된 것으로, 본 발명이 해결하고자 하는 과제는 기존 범퍼빔 대비 두께가 얇은 강판의 전면에 탄소섬유 강화수지를 다수매 적층한 상태로 내부에 히팅코일을 갖는 프레스를 통하여 범퍼빔의 형상으로 가압 성형 및 열 융착을 순차적으로 진행하여 경량화 및 충돌 성능이 우수한 탄소섬유 강화수지층을 갖는 범퍼빔을 성형하는 차량용 범퍼빔 제조방법을 제공하는 것이다. Therefore, the present invention has been invented to solve the conventional problems as described above, the problem to be solved by the present invention is a state in which a large number of carbon fiber reinforced resin laminated on the front surface of the steel sheet thinner than the conventional bumper beam inside The present invention provides a method for manufacturing a bumper beam for a vehicle in which a bumper beam having a carbon fiber reinforced resin layer having excellent weight and impact performance is formed by sequentially performing press molding and thermal fusion in the shape of a bumper beam through a press having a heating coil. .

상기한 바와 같은 기술적 과제를 실현하기 위한 본 발명의 차량용 범퍼빔 제조방법은 상부 및 하부 성형금형의 내부에 각각 히팅코일을 갖는 상형과 하형을 구비하는 프레스의 상기 하부 성형금형 상에 강판을 투입하여 로딩하는 단계; 상기 강판의 상면에 탄소섬유 강화수지를 다수매 적층하여 탄소섬유 강화수지층을 형성하는 단계; 상기 탄소섬유 강화수지층의 상면에 필름을 적층하는 단계; 상기 프레스의 상형을 하강시켜 상기 탄소섬유 강화수지층과 함께 강판을 범퍼빔의 형상으로 가압 성형하는 단계; 상기 각 히팅코일에 전원을 공급하여 상기 탄소섬유 강화수지층을 강판에 열 융착시켜 탄소섬유 강화수지층을 갖는 범퍼빔으로 성형하는 단계;로 이루어지는 것을 특징으로 한다.In the method for manufacturing a bumper beam for a vehicle of the present invention for realizing the technical problem as described above, by inserting a steel sheet on the lower molding mold of the press having an upper mold and a lower mold having a heating coil in the upper and lower molding molds, respectively. Loading; Stacking a plurality of carbon fiber reinforced resins on the upper surface of the steel sheet to form a carbon fiber reinforced resin layer; Stacking a film on an upper surface of the carbon fiber reinforced resin layer; Lowering the upper mold of the press and pressing the steel sheet together with the carbon fiber reinforced resin layer into a shape of a bumper beam; And supplying power to each heating coil to heat-bond the carbon fiber reinforced resin layer to a steel sheet to form a bumper beam having a carbon fiber reinforced resin layer.

여기서, 상기 탄소섬유 강화수지층은 다수매의 일방향 프리프레그(Prepreg; 탄소섬유를 일방향으로 배열해 에폭시 수지를 함침한 시트상의 중간재료)를 직각으 로 적층하여 이루어지는 것을 특징으로 한다.Herein, the carbon fiber reinforced resin layer is formed by stacking a plurality of one-way prepregs (intermediate material in a sheet-like intermediate material impregnated with an epoxy resin by arranging carbon fibers in one direction) at right angles.

이상에서 설명한 바와 같이, 본 발명에 따른 차량용 범퍼빔 제조방법에 의하면, 기존 범퍼빔 대비 두께가 얇은 강판의 전면에 탄소섬유 강화수지를 다수매 적층한 상태로 내부에 히팅코일을 갖는 프레스를 통하여 범퍼빔의 형상으로 가압 성형 및 열 융착을 순차적으로 진행하여 경량이면서 강성이 우수한 탄소섬유 강화수지층을 갖는 범퍼빔을 제조함으로써, 자체 강성을 보강하기 위하여 강판의 두께를 두껍게 할 필요가 없어 경량화가 가능하며, 충돌 성능 또한, 우수한 범퍼빔을 제조할 수 있게 된다. As described above, according to the method for manufacturing a bumper beam for a vehicle according to the present invention, a bumper is provided through a press having a heating coil therein while a plurality of carbon fiber reinforced resins are laminated on the front surface of a steel sheet thinner than a conventional bumper beam. Pressure bumping and thermal fusion can be performed in the shape of a beam to produce a bumper beam having a carbon fiber reinforced resin layer that is lightweight and excellent in rigidity. In addition, the collision performance, it is possible to manufacture a superior bumper beam.

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 3은 본 발명의 실시예에 따른 차량용 범퍼빔 제조방법의 공정도이고, 도 4는 본 발명의 실시예에 따른 차량용 범퍼빔 제조방법의 공정 블록도이다. 3 is a process diagram of a method for manufacturing a bumper beam for a vehicle according to an embodiment of the present invention, Figure 4 is a process block diagram of a method for manufacturing a bumper beam for a vehicle according to an embodiment of the present invention.

본 실시예에 따른 차량용 범퍼빔 제조방법은, 도 3과 도 4에서 도시한 바와 같이, 먼저, 프레스(1)의 하부 성형금형(13) 상에 강판(10)을 투입하여 로딩한다.(S1)In the method for manufacturing a vehicle bumper beam according to the present embodiment, as shown in FIGS. 3 and 4, first, the steel sheet 10 is loaded and loaded on the lower forming mold 13 of the press 1 (S1). )

이때, 상기 프레스(1)는 상형(3)과 하형(5) 내측으로 각각 상부 성형금형(11)과 하부 성형금형(13)이 설치되는데, 상기 상부 및 하부 성형금형(11,13)의 내부에는 각각 히팅코일(HC)을 갖는다. At this time, the press (1) is installed in the upper mold (3) and the lower mold (5), the upper molding mold 11 and the lower molding mold 13, respectively, the inside of the upper and lower molding mold (11, 13) Each has a heating coil HC.

또한, 상기 하부 성형금형(13)에 로딩되는 강판(10)은 그 두께가 기존의 범퍼빔 두께보다 약 50% 이하의 두께를 적용하여 제조되어 범퍼빔의 중량을 절감하게 된다. In addition, the steel sheet 10 loaded on the lower molding mold 13 is manufactured by applying a thickness of about 50% or less than the thickness of the existing bumper beam to reduce the weight of the bumper beam.

이어서, 상기 강판(10)의 상면에는 탄소섬유 강화수지를 다수매 적층하여 탄소섬유 강화수지층(20)을 형성한다.(S2) Subsequently, a plurality of carbon fiber reinforced resins are stacked on the upper surface of the steel sheet 10 to form a carbon fiber reinforced resin layer 20. (S2)

여기서, 상기 탄소섬유 강화수지층(20)은 다수매의 일방향 프리프레그(21)(Prepreg; 즉, 탄소섬유를 일방향으로 배열해 에폭시 수지를 함침한 시트상의 중간재료)를 직각으로 적층하여 형성된다. Here, the carbon fiber reinforced resin layer 20 is formed by laminating a plurality of one-way prepregs 21 (that is, a sheet-like intermediate material in which carbon fibers are arranged in one direction and impregnated with epoxy resin) at right angles. .

그리고 상기 탄소섬유 강화수지층(20)의 상면에는 상부 성형금형(11)과 탄소섬유 강화수지층(20)이 접착되는 것을 방지하도록 필름(23)을 적층한다.(S3)The film 23 is laminated on the upper surface of the carbon fiber reinforced resin layer 20 to prevent the upper molding mold 11 and the carbon fiber reinforced resin layer 20 from adhering to each other.

이어서, 상기 프레스(1)의 상형(3)을 하강시켜 상기 탄소섬유 강화수지층(20)과 함께 강판(10)을 범퍼빔의 형상으로 가압하여 성형한다.(S4)Subsequently, the upper die 3 of the press 1 is lowered, and the steel sheet 10 is pressed together with the carbon fiber reinforced resin layer 20 to form a bumper beam.

이때, 상기 탄소섬유 강화수지층(20)은 강판(10)과 일체로 상부 성형금형(11)과 하부 성형금형(13) 사이에서, 도 5에서 도시한 바와 같이, 범퍼빔(30)의 형상으로 성형되며, 상기 필름(23)에 의해 탄소섬유 강화수지층(20)이 상부 성형금형(11)에 접착되지는 않게 된다. At this time, the carbon fiber reinforced resin layer 20 is integrally formed with the steel sheet 10 between the upper molding mold 11 and the lower molding mold 13, as shown in Figure 5, the shape of the bumper beam 30 It is molded in, the carbon fiber reinforced resin layer 20 by the film 23 is not bonded to the upper molding mold (11).

이러한 상태로, 상기 상부 및 하부 성형금형(11,13)의 내부에 구비된 히팅코일(HC)에 전원을 공급하여 상부 및 하부 성형금형(11,13)을 약 150℃ 내지 200℃ 사이의 온도로 가열하여 상기 탄소섬유 강화수지층(20)을 강판(10)에 열 융착시켜 탄소섬유 강화수지층(20)을 갖는 범퍼빔(30)으로 성형하게 된다.(S5)In this state, power is supplied to the heating coil HC provided in the upper and lower molding molds 11 and 13 to heat the upper and lower molding molds 11 and 13 at a temperature of about 150 ° C to 200 ° C. The carbon fiber reinforced resin layer 20 is thermally fused to the steel sheet 10 by heating to form a bumper beam 30 having the carbon fiber reinforced resin layer 20. (S5)

따라서, 상기한 바와 같은 공정을 갖는 차량용 범퍼빔 제조방법에 의하면, 기존 범퍼빔 대비 두께가 약 50%이상 얇은 강판(10)의 전면에 탄소섬유 강화수지를 다수매 적층한 상태로 범퍼빔의 형상으로 가압 성형 및 열 융착을 순차적으로 진행하여, 도 5에서 도시한 바와 같이, 경량이면서도 강성이 우수한 탄소섬유 강화수지층(20)을 갖는 범퍼빔(30)을 제조할 수 있게 된다.Therefore, according to the method for manufacturing a vehicle bumper beam having the above-described process, the shape of the bumper beam in a state in which a plurality of carbon fiber reinforced resins are laminated on the front surface of the steel sheet 10 which is about 50% or more thinner than the conventional bumper beam. By sequentially proceeding pressure forming and thermal fusion, as shown in Figure 5, it is possible to manufacture a bumper beam 30 having a carbon fiber reinforced resin layer 20 excellent in weight and rigidity.

이와 같이, 본 실시예에 따른 차량용 범퍼빔 제조방법에 의해 생산된 탄소섬유 강화수지층(20)을 갖는 범퍼빔(30)은, 도 5에서 도시한 바와 같이, 그 탄소섬유 강화수지층(20)의 외부면에 필름(23)이 그대로 부착된 상태로 프레스(1)로부터 취출됨으로, 후공정에서, 상기 필름(23)을 제거하여 제품을 완성하게 된다.As described above, the bumper beam 30 having the carbon fiber reinforced resin layer 20 produced by the vehicle bumper beam manufacturing method according to the present embodiment has the carbon fiber reinforced resin layer 20 as shown in FIG. 5. The film 23 is taken out from the press 1 in a state where the film 23 is attached to the outer surface of the c) as it is, and in a later step, the film 23 is removed to complete the product.

도 1은 일반적인 차량용 범퍼의 분해 사시도이다.1 is an exploded perspective view of a general vehicle bumper.

도 2는 종래 기술에 따른 차량용 범퍼빔 유닛의 사시도이다.2 is a perspective view of a vehicle bumper beam unit according to the prior art.

도 3은 본 발명의 실시예에 따른 차량용 범퍼빔 제조방법의 공정도이다. 3 is a process diagram of a method for manufacturing a bumper beam for a vehicle according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 따른 차량용 범퍼빔 제조방법의 공정 블록도이다.4 is a process block diagram of a method for manufacturing a bumper beam for a vehicle according to an embodiment of the present invention.

도 5는 본 발명의 실시예에 따른 차량용 범퍼빔 제조방법에 의해 제조된 범퍼빔의 사시도이다. 5 is a perspective view of a bumper beam manufactured by a method for manufacturing a bumper beam for a vehicle according to an exemplary embodiment of the present invention.

Claims (4)

삭제delete 삭제delete 차량용 범퍼빔 제조방법에 있어서, In the vehicle bumper beam manufacturing method, 상부 및 하부 성형금형의 내부에 각각 히팅코일을 갖는 상형과 하형을 구비하는 프레스의 상기 하부 성형금형 상에 강판을 투입하여 로딩하는 단계(S1);Injecting and loading a steel sheet onto the lower molding mold of the press having an upper mold and a lower mold having heating coils inside the upper and lower molding molds (S1); 상기 강판의 상면에 일방향 프리프레그(Prepreg)로 구성된 탄소섬유 강화수지를 다수매 직각으로 적층하여 탄소섬유 강화수지층을 형성하는 단계(S2);Forming a carbon fiber reinforced resin layer by stacking a plurality of carbon fiber reinforced resins composed of one-way prepregs at right angles on the upper surface of the steel sheet (S2); 상기 탄소섬유 강화수지층의 상면에 필름을 적층하는 단계(S3);Stacking a film on the upper surface of the carbon fiber reinforced resin layer (S3); 상기 프레스의 상형을 하강시켜 상기 탄소섬유 강화수지층과 함께 강판을 범퍼빔의 형상으로 가압 성형하는 단계(S4);Lowering the upper mold of the press and pressing the steel sheet together with the carbon fiber reinforced resin layer into a shape of a bumper beam (S4); 상기 각 히팅코일에 전원을 공급하여 상기 탄소섬유 강화수지층을 강판에 열 융착시켜 탄소섬유 강화수지층을 갖는 범퍼빔으로 성형하는 단계(S5);로 이루어지는 것을 특징으로 하는 차량용 범퍼빔 제조방법.And supplying power to each heating coil to heat-bond the carbon fiber reinforced resin layer to a steel sheet to form a bumper beam having a carbon fiber reinforced resin layer (S5). 삭제delete
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KR100818722B1 (en) * 2006-11-07 2008-04-01 주식회사 지엔에스 Hybrid bumper beam assembly of vehicle and method for manufacturing the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9902351B2 (en) 2014-03-31 2018-02-27 SABIC Global Technologies B.V Hybrid bumper beams and methods for making and using the same

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