KR20190141889A - Laminated structure of CFRP roof rail - Google Patents

Laminated structure of CFRP roof rail Download PDF

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Publication number
KR20190141889A
KR20190141889A KR1020180068647A KR20180068647A KR20190141889A KR 20190141889 A KR20190141889 A KR 20190141889A KR 1020180068647 A KR1020180068647 A KR 1020180068647A KR 20180068647 A KR20180068647 A KR 20180068647A KR 20190141889 A KR20190141889 A KR 20190141889A
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KR
South Korea
Prior art keywords
roof rail
cfrp
present
laminated structure
roof
Prior art date
Application number
KR1020180068647A
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Korean (ko)
Inventor
송일종
전재민
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(주)현대하이텍
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Priority to KR1020180068647A priority Critical patent/KR20190141889A/en
Publication of KR20190141889A publication Critical patent/KR20190141889A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/12—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/07—Parts immersed or impregnated in a matrix
    • B32B2305/076—Prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/03—Reducing weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection

Abstract

The present invention relates to a laminated structure of a CFRP roof rail for a vehicle which has secured sufficient rigidity while significantly reducing body weight. The present invention provides a roof rail consisting of six roop rails, the center of which is made of CFRP and both ends of which are made of steel. According to the present invention, provided is a vehicle body roof rail that can maintain rigidity while reducing weight and is easy to assemble.

Description

CFRP 루프레일의 적층구조{Laminated structure of CFRP roof rail}Laminated structure of CFRP roof rail

본 발명은 CFRP 루프레일의 적층구조에 관한 것이며, 구체적으로 차체무게를 대폭 줄이면서도 충분한 강성을 확보한 자동차용 CFRP 루프레일의 적층구조에 관한 것이다.The present invention relates to a laminated structure of a CFRP roof rail, and more particularly, to a laminated structure of a CFRP roof rail for automobiles, which has sufficiently reduced vehicle weight and secures sufficient rigidity.

세계 자동차 산업은 지구온난화와 자원고갈로 최대 격변기 직면하고, 글로벌 전 산업 분야 중 수송 부문의 온실가스 배출량은 25%로 각국은 온실가스 배출억제를 위한 자동차 분야 규제 강화와 선진 각국을 필두로 자동차 연비규제가 강화되면서 2025년까지 연비 약 2배 향상이 필요 되며, 규제 미달 시 가혹한 벌금이 부가될 전망임. 이에 연비향상 기술은 향후 자동차 시장경쟁력을 결정짓는 핵심 사항으로 작용할 것이다.The global auto industry faces the biggest upheaval due to global warming and resource depletion, and greenhouse gas emissions in the transport sector are 25% among all global industries, with each country strengthening its vehicle regulations to curb greenhouse gas emissions and leading automobile fuel economy. As regulations are tightened, fuel economy will need to double by 2025, and severe fines will be incurred if regulations fall short. Therefore, fuel economy improvement technology will act as a key determinant of future automotive market competitiveness.

이에 따라 선진 완성차 업체는 국제 환경 규제 및 연비 규제 대응의 일환으로 고효율 자동차 산업 육성에 총력을 집중하고 있으며, 자동차 경량화 기술이 가장 현실적 대안이며 향후 지속적 증가할 것으로 예측하고 있다.As a result, advanced automakers are focusing their efforts on fostering the high-efficiency automobile industry as part of international environmental regulations and fuel economy regulations, and anticipate that automobile lightweight technology is the most realistic alternative and will continue to increase in the future.

자동차는 기관과 프레임을 비롯하여 자동차의 주행에 필요한 모든 구성 장치를 포함하는 섀시(chassis)와, 이 섀시 위에 설치되어 자동차의 외형을 이루는 부분이며, 기관이 설치되는 기관실, 사람이 탑승하는 차실 및 화물을 수납하는 트렁크실 또는 화물실 등을 포함하는 차체(body)로 크게 구성된다.A car is a chassis that contains the engine and the frame, as well as all the components necessary to drive the car, and is the part of the car that is installed on the chassis, the engine room where the engine is installed, the passenger compartment and cargo It is largely composed of a body (body) including a trunk compartment or a cargo compartment for storing the.

이 차체는 사람이 탑승하는 차실의 경우 바닥을 이루는 플로어(floor), 천정을 이루는 루프 조립체(roof assembly), 엔진룸과 차실을 구획하는 카울 패널(cowl panel), 차실을 개폐하는 도어 및 루프와 플로어를 연결하는 다수의 필라(pillar)로 이루어진다.In the case of a passenger cabin, the floor occupies a floor, a roof assembly that forms a ceiling, a cowl panel that divides the engine compartment and the cabin, doors and roofs that open and close the cabin, It consists of a number of pillars connecting the floors.

자동차의 루프 부위는 차체 사이드 부위를 연결하고, 자동차 전체 골격을 유지하는 중요한 부위로서, 루프패널만으로 차체 사이드 부분을 지지하고 외적 충격에 견디기 어려워 루프패널의 하부에는 루프패널을 지지하기 위한 골격이 되는 루프레일이 설치된다.The roof part of the car is an important part that connects the body side part and maintains the entire body skeleton.It is a skeleton for supporting the roof part part only by the roof panel, and it is difficult to withstand external shocks. The roof rail is installed.

상기 루프레일은 차축 방향으로 길게 배치되면서 차체 길이방향을 따라 소정간격으로 이격되게 설치되고, 센터레일 2개와 프런트레일 및 리어레일 1개로 이루어져, 루프패널에 스폿 용접 및 마스틱 실러에 의해 조립된다.The roof rails are disposed long in the axle direction and spaced apart at predetermined intervals along the vehicle body length direction. The roof rails include two center rails, one front rail and one rear rail, and are assembled to the roof panel by spot welding and a mastic sealer.

하지만, 이러한 루프레일은 무게가 너무 무겁고 조립이 어려운 단점이 있다.However, such a roof rail has a weight that is too heavy and difficult to assemble.

도 1에 나타낸 공개특허 제10-2016-0014934호에 의하면 루프레일의 강성을 보완하는 리인포스 레일을 추가하여 강성을 보강하였지만, 구조가 복잡해지고 무게가 증가하는 문제점이 있다.According to Korean Patent Publication No. 10-2016-0014934 shown in Figure 1 to reinforce the rigidity by adding a reinforce rail to supplement the rigidity of the roof rail, there is a problem that the structure is complicated and the weight increases.

본 발명은 상기한 문제점을 해결하기 위한 것으로서, 무게를 줄이면서도 강성을 유지할 수 있고 조립이 용이한 차체 루프레일을 제공하기 위한 것이다.The present invention is to solve the above problems, to provide a vehicle roof rail that can maintain rigidity while reducing weight and easy assembly.

상기한 목적을 달성하기 위하여, 본 발명은 6개의 루프레일로 이루어지면서, 중앙은 CFRP, 양단은 스틸로 이루어지는 루프레일을 제공한다.In order to achieve the above object, the present invention is provided with a loop rail consisting of six loop rails, the center is CFRP, both ends are made of steel.

본 발명에 의하면, 무게를 줄이면서도 강성을 유지할 수 있고 조립이 용이한 차체 루프레일을 제공할 수 있다.According to the present invention, it is possible to provide a vehicle roof rail that can maintain rigidity while reducing weight and is easy to assemble.

도 1은 종래기술에 의한 루프레일의 내부구조를 나타낸 단면도;
도 2는 본 발명에 의한 프리프레그 제조공정을 나타낸 설명도;
도 3은 본 발명에 의한 CFRP 루프레일의 적층구조를 나타낸 구조도;1 is a cross-sectional view showing the internal structure of a roof rail according to the prior art;
2 is an explanatory diagram showing a prepreg manufacturing process according to the present invention;
3 is a structural diagram showing a laminated structure of a CFRP loop rail according to the present invention;

본 발명의 실시예의 구성 및 작용에 대하여 첨부한 도면을 참조하여 상세하게 설명한다.The configuration and operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 의한 루프 레일(Roof Rail)은 전복 및 충돌사고 시 차체 및 승객 보호를 목적으로 하는 차량 지붕부의 강성 보강용 부품으로 현 양산품에서 인장강도 980Mpa급 초고강도강을 적용하고 있는데 이를 CFRP(탄소섬유강화플라스틱)을 적용하여 경량화 33%와 더불어 구조 최적화를 통한 동등이상의 강성을 확보하였다.The roof rail according to the present invention is a rigid reinforcing part for the vehicle roof part for the purpose of protecting the body and passengers in the event of overturning and crash, and uses the 980Mpa grade super high strength steel in the current mass production. Fiber reinforced plastic) is applied to secure lightweight and 33% of stiffness.

현재 기술개발된 루프레일은 CFRP 성형공정중에서 양산성이 우수한 프리프레그 컴프레션 몰딩(prepreg compression molding) 공법을 적용하여 제작되었으며, 속경화성 소재 사용의 경우에 5분안에 성형이 완료된다.The currently developed roof rail is manufactured by applying the prepreg compression molding method which is excellent in mass production during the CFRP molding process, and the molding is completed within 5 minutes in the case of using a fast curing material.

기존 루프레일 대비 경량화는 33% 달성하였으며, 동등이상의 강성을 확보하기 위해서 루프레일 위치별 두께 최적화 및 형상 최적화를 진행하였다.    The weight reduction compared to the existing roof rail was 33%, and the thickness optimization and shape optimization for each roof rail location was carried out in order to secure the equivalent rigidity.

루프 레일의 강성 확보를 위해서 최적의 적층구조를 설계하였으며 도 3과 같은 적층구조로 루프 레일 제작시 가장 높은 강성을 확보할 수 있었다.In order to secure the stiffness of the roof rails, an optimal lamination structure was designed and the highest stiffness was secured when the roof rails were manufactured with the lamination structure as shown in FIG. 3.

상기에서는 본 발명의 실시예들을 참조하여 설명하였지만, 해당 기술 분야에서 통상의 지식을 가진 자라면 하기의 특허 청구범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다.Although the above has been described with reference to the embodiments of the present invention, those skilled in the art may variously modify and modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that it can be changed.

100 : 루프레일100: roof rail

Claims (1)

스틸 평판;
상기 스틸 평판의 상부 또는 하부에 CFRP이 적층된 차량용 루프레일.Steel plate;
Vehicle roof rails CFRP is laminated on the upper or lower portion of the steel plate.
KR1020180068647A 2018-06-15 2018-06-15 Laminated structure of CFRP roof rail KR20190141889A (en)

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KR1020180068647A KR20190141889A (en) 2018-06-15 2018-06-15 Laminated structure of CFRP roof rail

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