KR100645750B1 - Mounting welding structure of rear cross member in vehicle - Google Patents

Mounting welding structure of rear cross member in vehicle Download PDF

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Publication number
KR100645750B1
KR100645750B1 KR1020050091018A KR20050091018A KR100645750B1 KR 100645750 B1 KR100645750 B1 KR 100645750B1 KR 1020050091018 A KR1020050091018 A KR 1020050091018A KR 20050091018 A KR20050091018 A KR 20050091018A KR 100645750 B1 KR100645750 B1 KR 100645750B1
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South Korea
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welding
cross member
rear cross
mounting
vehicle
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KR1020050091018A
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Korean (ko)
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김민석
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현대모비스 주식회사
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    • 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
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles

Abstract

A mounting welding structure of a rear cross member for a vehicle is provided to increase the welded area and reduce the welded length by mounting the welding burring flange expanding the welded area. A mounting welding structure of a rear cross member(2) for a vehicle for fixing the rear cross member at a sub frame(1) formed along the longitudinal direction of the vehicle through the medium of a mounting bush(3) is composed of a positioning cup(4) formed like a cup by press-fitting a bush(5) formed at the mounting push; and a welding burring flange(2a) rectangularly projected along the shape at the end of the rear cross member and placed with the side of the positioning cup to expand the mutually welded area. The welding burring flange is projected along the end of the rear cross member.

Description

차량용 리어 크로스멤버의 마운팅 용접 구조{Mounting welding structure of rear cross member in vehicle}Mounting welding structure of rear cross member in vehicle}

도 1은 본 발명에 따른 차량용 리어 크로스멤버의 마운팅 용접 구조도1 is a mounting welding structure diagram of a vehicle rear crossmember according to the present invention

도 2 (가),(나)는 본 발명에 다른 마운팅 용접 구조의 부분 확대도2 (a), (b) is an enlarged partial view of a mounting welding structure according to the present invention

<도면의 주요부분에 대한 부호의 설명>    <Description of the symbols for the main parts of the drawings>

1 : 서브프레임 2 : 리어크로스멤버1: subframe 2: rear cross member

2a : 용접버링플랜지 3 : 마운팅부시2a: Welding Burring Flange 3: Mounting Bush

4 : 포지셔닝컵 5 : 부시4: Positioning Cup 5: Bush

a : 용접공간 K : 용접형상단a: Welding space K: Weld shape top

본 발명은 차량용 리어 크로스멤버의 마운팅에 관한 것으로, 보다 상세하게는 두 물체간에 겹치기 용접을 이용하여 용접 불량을 해소할 수 있도록 된 차량용 리어 크로스멤버의 마운팅 용접 구조에 관한 것이다.The present invention relates to mounting of a vehicle rear crossmember, and more particularly, to a mounting welding structure of a vehicle rear crossmember that can eliminate welding defects by using overlap welding between two objects.

일반적으로 승용 차량의 경우 서스펜션(suspension)의 하중이 집중되는 부분 에 크로스멤버를 설치하여 서스펜션의 많은 부품들을 지지하면서 차체로 전달되는 횡 방향 하중을 감당하도록, 차량의 전방부위로 프런트크로스멤버를 설치하면서 차량의 후방부위로는 리어 크로스 멤버를 설치해주게 된다.In general, in the case of a passenger vehicle, a front cross member is installed at the front part of the vehicle so that the cross member is installed at the portion where the load of the suspension is concentrated so as to support the lateral load transmitted to the vehicle body while supporting many parts of the suspension. In the rear of the car, a rear cross member is installed.

이러한, 크로스멤버는 통상적으로, 차체의 폭 방향으로 길게 연장 형성되는 멤버부재들이 서로 겹쳐진 상태로 용접되어 내부 폐 공간을 형성하면서, 볼트와 너트 및 고무 부시로 이루어진 마운팅 부시 구조를 이용하여 차체 쪽으로 체결되어진다.Such a cross member is typically fastened toward the vehicle body by using a mounting bush structure composed of bolts, nuts, and rubber bushes, while forming member inner spaces formed by overlapping each other with members extending in the width direction of the vehicle body. It is done.

이때, 상기 크로스멤버를 차체 쪽으로 체결하는 마운팅 부시는 크로스멤버에 홀을 뚫어 관통시키는 방식을 이용하거나 또는, 상기 크로스멤버의 끝단부위에서 용접되는 방식을 이용하게 된다.In this case, the mounting bush for fastening the cross member toward the vehicle body may use a method of penetrating a hole in the cross member, or a method of welding at the end of the cross member.

그러나, 상기 마운팅 부시를 크로스멤버의 끝단부위에서 용접하는 방식을 사용하는 경우에는, 상기 마운팅 부시가 끼워지는 컵형상 부재를 크로스멤버의 끝단부위로 위치시킨 상태에서 외부에서 그 접촉면 부위를 따라 용접하게 되고 즉, 용접부위가 서로 직각으로 맞대어져서 용접됨으로서 용접시 치수관리가 어렵고 용접성 저하가 발생됨과 더불어 접촉부의 치수가 정확하지 못할 경우 용접이 아래쪽으로 흘려 내리거나 언더컷을 유발하는 등 용접 불량이 발생되는 여지가 많게 된다.However, in the case of using the method of welding the mounting bush at the end of the cross member, the cup-shaped member into which the mounting bush is fitted is positioned at the end of the cross member so as to be welded along the contact surface from the outside. That is, the welding parts are welded with each other at right angles to each other, which makes it difficult to control the dimension during welding, and the weldability is deteriorated. In addition, when the contact part is inaccurate, welding defects occur such as welding flowing downward or causing undercut. There is plenty of room.

이와 같이, 컵 형상 부재를 먼저 크로스멤버에 용접한 후 마운팅 부시를 압입해 끼워주게 되면 공정상으로는 간단하지만, 반면에 용접 부위에 대한 치수관리의 어려움과 더불어 용접성에 있어서도 상당한 어려움이 있는 취약점이 있게 된다.As such, if the cup-shaped member is first welded to the crossmember and then press-fitted to the mounting bush, the process is simple. However, there is a weak point in the weldability as well as the difficulty in the dimensional control of the welded portion. .

또한, 이와 같이 컵 형상 부재와 크로스멤버간의 용접부위가 외부에서 볼 수 있는 접촉면으로 국한되어 즉, 크로스멤버의 끝단부와 컵 부재간의 접촉면에 용접됨에 따라 용접 면적이 크지 않게 형성되므로 지속적인 외력이 가해짐에 따라 서로간에 갭(Gap)이 형성될 수 있는 취약성이 있게 됨은 물론이다.In addition, the welding area between the cup-shaped member and the cross member is limited to the contact surface visible from the outside. That is, the welding area is not formed as large as the welded area is welded to the contact surface between the end of the cross member and the cup member. Of course, there is a vulnerability that can form a gap (gap) between each other according to the load.

이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 마운팅 부시가 압입되어 끼워지는 컵 부재가 덧대어지는 크로스멤버 부위로 돌출되는 버링 형상을 추가해, 서로간의 접촉면적을 증가하면서 용접부위와 용접 면적도 증가시켜 용접에 따른 치수관리에 대한 제약을 줄이면서 용접 불량을 방지해 내구성도 향상함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above-mentioned point, and a burring shape protruding to a cross member portion in which a cup member into which a mounting bush is press-fitted is padded is added, and a welded area and a welded area are also increased while increasing the contact area between each other. The purpose of the present invention is to improve the durability by preventing welding defects while reducing the restriction on dimensional management by welding.

상기와 같은 목적을 달성하기 위한 본 발명은, 차폭 방향으로 설치되는 리어크로스멤버의 양 끝단부위에서 용접되어진 마운팅부시를 매개로 차량의 길이 방향을 따라 형성되는 서브프레임에 상기 리어크로스멤버가 고정되는 차량용 리어 크로스멤버의 마운팅 구조에 있어서, The present invention for achieving the above object, the rear cross member is fixed to a subframe formed along the longitudinal direction of the vehicle via the mounting bushes welded at both ends of the rear cross member is installed in the vehicle width direction In the mounting structure of the vehicle rear crossmember,

상기 리어크로스멤버와 마운팅부시간을 고정하는 용접구조가 상기 마운팅부시를 이루는 부시가 압입되어 끼워지는 컵 형상의 포지셔닝컵과, 상기 리어크로스멤버의 끝단에서 형상을 따라 직각으로 돌출되어 상기 포지셔닝컵의 측면이 위치되면서 서로간의 용접 면적을 확장하도록 된 용접버링플랜지로 이루어진 것을 특징으로 한다.The welding structure for fixing the rear cross member and the mounting part time is a cup-shaped positioning cup into which the bush forming the mounting bush is press-fitted and protrudes at right angles along the shape from the end of the rear cross member. The side is positioned, characterized in that made of a welding burring flange to expand the welding area between each other.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 차량용 리어 크로스멤버의 마운팅 용접 구조도를 도시한 것인바, 본 발명은 차량의 길이 방향을 따라 형성되는 서브프레임(1)에 볼트와 너트 체결되는 마운팅부시(3)를 매개로 차폭 방향으로 상기 서브프레임(1)의 양쪽으로 리어크로스멤버(2)가 고정되되, 1 shows a mounting welding structure diagram of a rear cross member for a vehicle according to the present invention, the present invention is mediated by the mounting bush (3) for fastening the bolt and nut to the subframe (1) formed along the longitudinal direction of the vehicle The rear cross member 2 is fixed to both sides of the subframe 1 in the vehicle width direction.

상기 리어크로스멤버(2)와 마운팅부시(3)간을 고정하는 용접구조는 상기 마운팅부시(3)를 이루는 부시(5)가 압입되어 끼워지는 컵 형상의 포지셔닝컵(4)과, 상기 리어크로스멤버(2)의 끝단에서 형상을 따라 직각으로 돌출되어 상기 포지셔닝컵(4)의 측면이 위치되면서 서로간의 용접 면적을 확장하도록 된 용접버링플랜지(2a)로 이루어진다.The welding structure fixing the rear cross member 2 and the mounting bush 3 includes a cup-shaped positioning cup 4 into which the bush 5 constituting the mounting bush 3 is press-fitted, and the rear cross. Protruding at right angles along the shape at the end of the member (2) is made of a welding burring flange (2a) to extend the welding area of each other while the side of the positioning cup (4) is located.

여기서, 상기 용접버링플랜지(2a)는 도 2(가),(나)에 도시된 바와 같이 포지셔닝컵(4)의 곡률에 상응하는 곡률을 형성한 리어크로스멤버(2)의 끝단부위를 따라 소정 높이로 돌출 형성되되, 상기 용접버링플랜지(2a)의 형성 위치는 리어크로스멤버(2)의 끝단 부위 폭에서 양쪽 부위가 소정간격(b)으로 들어간 위치로부터 즉, 용접 시 상기 용접버링플랜지(2a)와 포지셔닝컵(4)간에 형성되는 용접면을 통한 용접이 용이하도록 하기 위함이다.Here, the welding burring flange (2a) is predetermined along the end of the rear cross member (2) formed a curvature corresponding to the curvature of the positioning cup (4), as shown in Figure 2 (a), (b) The welding burring flange 2a is formed at a height, and the position at which the welding burring flange 2a is formed is from a position where both portions enter a predetermined interval b in the width of the end portion of the rear cross member 2, that is, the welding burring flange 2a during welding. In order to facilitate welding through the welding surface formed between the) and the positioning cup (4).

이와 같이, 서브프레임(1)에 마운팅부시(3)를 매개로 고정되는 리어크로스멤버(2)가 갖는 용접구조를 이용하게 되면, 도 2(가)에 도시된 바와 같이 상기 마운 팅부시(3)를 이루는 부시(5)가 압입되어 끼워지는 포지셔닝컵(4)과 리어크로스멤버(2)의 끝단 부위간에 형성된 용접공간(a)을 통해 충분한 용접 고정력을 형성하게 된다.As such, when using the welding structure of the rear cross member 2 fixed to the subframe 1 via the mounting bush 3, the mounting bush 3 as shown in FIG. A sufficient welding holding force is formed through the welding space (a) formed between the positioning cup (4) and the end portion of the rear cross member (2) to which the bush (5) forming a press fit.

즉, 상기 포지셔닝컵(4)의 측면이 리어크로스멤버(2)의 끝단 부와 더불어 상기 리어크로스멤버(2)로부터 소정 높이로 돌출된 용접버링플랜지(2a)간에 형성된 접촉 면적을 통해, 상기 리어크로스멤버(2)의 끝단 부로만 국한되었던 용접 면적이 도 1에 도시된 바와 같이, 상기 용접버링플랜지(2a)의 형상을 따라 그 안쪽 면으로 용접형상단(K)이 용접버링플랜지(2a)의의 폭과 높이에 상응하게 형성되므로, 용접에 따른 리어크로스멤버(2)와 포지셔닝컵(4)간의 고정력이 크게 증가되어 내구성도 함께 증가되어진다.That is, the rear side of the positioning cup (4) through the contact area formed between the end of the rear cross member (2) and the welding burring flange (2a) protruding from the rear cross member 2 to a predetermined height, As shown in FIG. 1, the welding area, which was limited to only the end of the cross member 2, is welded to the inner surface along the shape of the welding burring flange 2a, and the welding burring flange 2a is formed. Since it is formed corresponding to the width and height of the right, the fixing force between the rear cross member (2) and the positioning cup (4) due to welding is greatly increased, and durability is also increased.

또한, 본 발명은 용접 작업이 보다 용이하게 수행되는데 이는, 도 2에 도시된 바와 같이 상기 리어크로스멤버(2)의 용접버링플랜지(2a)가 리어크로스멤버(2)의 끝단 부위에서 소정간격(b)으로 들어간 위치로부터 형성되므로, 용접 시 포지셔닝컵(4)과 리어크로스멤버(2)의 끝단 부위간에 형성된 용접공간(a)의 측면쪽을 통한 용접 작업이 용이하게 된다.In addition, the present invention is a welding operation is more easily performed, as shown in Figure 2, the welding burring flange (2a) of the rear cross member (2) is a predetermined interval (at the end of the rear cross member 2) ( Since it is formed from the position entered into b), the welding operation through the side of the welding space (a) formed between the end portion of the positioning cup (4) and the rear cross member (2) during welding is facilitated.

그리고, 상기 포지셔닝컵(4)에 대한 용접 작업이 용접버링플랜지(2a)를 기준으로 행해지므로 즉, 포지셔닝컵(4)과 리어크로스멤버(2)의 끝단 부위간에 대한 용접 위치와 용접 부위를 나타내는 기준으로 용접버링플랜지(2a)를 이용하게 되므로 용접 길이에 대한 치수 관리적인 측면도 용이하게 결정될 수 있으면서 또한, 상기 용접버링플랜지(2a)의 폭 만큼 용접 면적도 증가되므로 동일한 상대적으로 용접 길 이를 줄일 수 있음은 물론 리어크로스멤버(2)의 끝단 부위인 좁은 폭을 통해 용접 할때에 비해 상대적으로 용접 불량률이 크게 감소되거나 거의 없어지게 됨은 물론이다.Further, since the welding work on the positioning cup 4 is performed based on the welding burring flange 2a, that is, the welding position and the welding part with respect to the end portions of the positioning cup 4 and the rear cross member 2 are shown. Since the welding burring flange 2a is used as a reference, the dimension management aspect of the welding length can be easily determined, and the welding area is also increased by the width of the welding burring flange 2a, thereby reducing the same relative welding length. Of course, compared to when welding through the narrow width of the end portion of the rear cross member (2) relative welding failure rate is greatly reduced or almost disappear.

이상 설명한 바와 같이 본 발명에 의하면, 용접되는 부위를 돌출시켜 서로간의 접촉 면적을 증가하는 버링 구조를 이용하여 용접면적도 함께 증가시켜 내구성을 향상함과 더불어, 서로간에 용접되는 용접부에 돌출된 버링 구조를 기준으로 용접을 수행하므로 용접작업이 용이하면서 용접 길이나 폭등에 대한 치수 관리도 용이하게 되는 효과가 있다.As described above, according to the present invention, by using a burring structure that protrudes the welded portion to increase the contact area between each other, the welding area is also increased to improve durability, and the burring structure protrudes from the welded portion welded to each other. Since welding is performed on the basis of the welding, the welding operation is easy and the dimension management of the welding length or the width is also easy.

또한, 본 발명은 용접 시 버링 구조를 이용하여 용접 작업이 용이하면서 용접 면적의 증가만큼 용접 길이도 줄여 주면서도 용접 불량률이 거의 없어 원가측면에서 유리하게 되는 효과가 있음은 물론이다.In addition, the present invention has the effect that it is advantageous in terms of cost because there is almost no welding failure rate while reducing the welding length by increasing the welding area while using a burring structure when welding.

Claims (3)

차폭 방향으로 설치되는 리어크로스멤버(2)의 양 끝단부위에서 용접되어진 마운팅부시(3)를 매개로 차량의 길이 방향을 따라 형성되는 서브프레임(1)에 상기 리어크로스멤버(2)가 고정되는 차량용 리어 크로스멤버의 마운팅 구조에 있어서, The rear cross member 2 is fixed to a subframe 1 formed along the longitudinal direction of the vehicle via a mounting bush 3 welded at both ends of the rear cross member 2 installed in the vehicle width direction. In the mounting structure of the vehicle rear crossmember, 상기 리어크로스멤버(2)와 마운팅부시(3)간을 고정하는 용접구조가 상기 마운팅부시(3)를 이루는 부시(5)가 압입되어 끼워지는 컵 형상의 포지셔닝컵(4)과, 상기 리어크로스멤버(2)의 끝단에서 형상을 따라 직각으로 돌출되어 상기 포지셔닝컵(4)의 측면이 위치되면서 서로간의 용접 면적을 확장하도록 된 용접버링플랜지(2a)로 이루어진 것을 특징으로 하는 차량용 리어 크로스멤버의 마운팅 용접구조.A cup-shaped positioning cup 4 in which a welding structure for fixing the rear cross member 2 and the mounting bush 3 is inserted into and fitted with the bush 5 forming the mounting bush 3, and the rear cross. Of the rear cross member for a vehicle, characterized in that made of a welding burring flange (2a) to protrude at right angles along the shape at the end of the member (2) to the side of the positioning cup (4) to expand the weld area between each other Mounting welded structure. 제 1항에 있어서, 상기 용접버링플랜지(2a)는 포지셔닝컵(4)의 곡률에 상응하는 곡률을 형성한 리어크로스멤버(2)의 끝단부위를 따라 소정 높이로 돌출 형성되어진 것을 특징으로 하는 차량용 리어 크로스멤버의 마운팅 용접구조. 2. The vehicle according to claim 1, wherein the welding burring flange (2a) is formed to protrude to a predetermined height along an end portion of the rear cross member (2) having a curvature corresponding to the curvature of the positioning cup (4). Mounting welding structure of rear cross member. 제 2항에 있어서, 상기 용접버링플랜지(2a)는 리어크로스멤버(2)의 끝단 부위 폭에서 들어간 위치로부터 형성되어진 것을 특징으로 하는 차량용 리어 크로스멤버의 마운팅 용접구조. 3. The mounting welding structure for a vehicle rear cross member according to claim 2, wherein the welding burring flange (2a) is formed from a position entered from the width of the end portion of the rear cross member (2).
KR1020050091018A 2005-09-29 2005-09-29 Mounting welding structure of rear cross member in vehicle KR100645750B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170070294A (en) * 2015-12-11 2017-06-22 현대자동차주식회사 Subframe assembly for vehicle
KR20200139955A (en) * 2019-06-05 2020-12-15 주식회사화신 Subframe for vehicle

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Publication number Priority date Publication date Assignee Title
JPS5617724A (en) 1979-07-20 1981-02-19 Fuji Heavy Ind Ltd Support device for differential carrier
JPH09193634A (en) * 1996-01-22 1997-07-29 Daihatsu Motor Co Ltd Suspension arm for automobile
KR19990019873A (en) * 1997-08-30 1999-03-25 양재신 Combination structure of suspension rod and bush of automobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5617724A (en) 1979-07-20 1981-02-19 Fuji Heavy Ind Ltd Support device for differential carrier
JPH09193634A (en) * 1996-01-22 1997-07-29 Daihatsu Motor Co Ltd Suspension arm for automobile
KR19990019873A (en) * 1997-08-30 1999-03-25 양재신 Combination structure of suspension rod and bush of automobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170070294A (en) * 2015-12-11 2017-06-22 현대자동차주식회사 Subframe assembly for vehicle
KR102251341B1 (en) * 2015-12-11 2021-05-13 현대자동차주식회사 Subframe assembly for vehicle
KR20200139955A (en) * 2019-06-05 2020-12-15 주식회사화신 Subframe for vehicle
KR102223261B1 (en) * 2019-06-05 2021-03-05 (주)화신 Subframe for vehicle

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