KR20030082111A - The manufacturing method of auto-body parts hydroforming process - Google Patents

The manufacturing method of auto-body parts hydroforming process Download PDF

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Publication number
KR20030082111A
KR20030082111A KR1020020020665A KR20020020665A KR20030082111A KR 20030082111 A KR20030082111 A KR 20030082111A KR 1020020020665 A KR1020020020665 A KR 1020020020665A KR 20020020665 A KR20020020665 A KR 20020020665A KR 20030082111 A KR20030082111 A KR 20030082111A
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South Korea
Prior art keywords
tube
manufacturing
mold
hydroforming
steel sheet
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KR1020020020665A
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Korean (ko)
Inventor
정병훈
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주식회사 성우하이텍
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Priority to KR1020020020665A priority Critical patent/KR20030082111A/en
Publication of KR20030082111A publication Critical patent/KR20030082111A/en

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Classifications

    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/045—Closing or sealing means

Abstract

PURPOSE: A manufacturing method of parts for automobiles by hydroforming is provided, which not only reduces production cost by fabricating automobile parts such as front side member through relatively simple process, but also reduces manufacturing cost by maximizing raw materials so that unnecessary scrap is not generated. CONSTITUTION: The manufacturing method of parts for automobiles by hydroforming comprises a step of fabricating a raw material of steel sheet into a tube(1) having hollow part by former; a step of filling liquid into the hollow part of the tube, and sealing both ends of the tube so that liquid is not leaked; and a step of arranging the tube into hydroforming mold, and increasing pressure of the inner part of the tube from a sealing part of the tube so that the tube is molded correspondingly to the shape of the mold, wherein the liquid is consisted of oil, wherein the method further comprises a step of extracting a sealing member and removing the fluid filled in the tube after the step of increasing the internal pressure of the tube so that the tube is formed according to the shape of the mold, and wherein a hollow tube is fabricated by welding neighboring steel sheet in high frequency welding in the step of fabricating a raw material of steel sheet into a tube having hollow part by former.

Description

하이드로 성형에 의한 차량용 부품의 제조 방법{The manufacturing method of auto-body parts hydroforming process}The manufacturing method of auto-body parts hydroforming process

본 발명은 하이드로 성형에 의한 차량용 부품의 제조 방법에 관한 것으로, 더욱 상세하게는 차량의 부품인 프론트 사이드 멤버를 제작할 때 하이드로 성형에 의하여 가공하는 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a vehicle component by hydroforming, and more particularly, to a method for processing by hydroforming when manufacturing a front side member that is a vehicle component.

일반적으로 차량용 프론트 사이드 멤버는 차량의 프론트 양측에 배치되어저속에서는 차량의 충돌 및 추돌시 차체의 변형을 줄이거나 또는 고속에서 충돌 및 추돌 시에 사이드 멤버를 좌굴(挫屈) 변형시킴으로서 충격에너지를 흡수하여, 차체의 손상 및 인명 피해를 최소화하는 부재이다.In general, the vehicle front side members are disposed on both sides of the front of the vehicle to absorb impact energy by reducing the deformation of the vehicle body at the low speed during the collision and collision of the vehicle or by buckling the side member during the collision and collision at high speed. Therefore, it is a member that minimizes damage to the vehicle body and human damage.

도 5는 종래의 제조 방법에 의하여 프론트 사이드 멤버를 제작한 구조를 도시한 도면이며, 도 6은 도 5의 B-B부를 절개하여 도시한 단면도이다. 상기 도 5 및 도 6을 통하여 보면 종래의 프론트 사이드 멤버(101)는 로워 멤버(103) 및 어퍼 멤버(105)가 서로 겹쳐지도록 배치하고, 상기 로워 멤버(103) 및 어퍼 멤버(105)가 이루는 내부 공간에 별도의 보강재(107)를 개재하고 상기 로워 멤버(103) 및 어퍼 멤버(105)가 접하는 부분을 점(spot) 용접하여 제조한다.FIG. 5 is a view illustrating a structure in which a front side member is manufactured by a conventional manufacturing method, and FIG. 6 is a cross-sectional view illustrating the B-B section of FIG. 5 and 6, the conventional front side member 101 is disposed so that the lower member 103 and the upper member 105 overlap each other, and the lower member 103 and the upper member 105 are formed. It is manufactured by spot welding a portion where the lower member 103 and the upper member 105 are in contact with each other through a separate reinforcing material 107 in the inner space.

이와 같이 다수의 패널을 프레스로 성형하여 프론트 사이드 멤버 등의 차량 부품을 제작할 때, 스크랩(scrap)이 많이 발생하여 원자재가 낭비되어 제조 원가가 증가되는 문제점을 가지고 있다.As described above, when manufacturing a vehicle part such as a front side member by forming a plurality of panels by a press, a lot of scrap occurs, and raw materials are wasted and manufacturing costs are increased.

또한, 종래의 프론트 사이드 멤버의 예에서와 같이 어퍼 및 로워 멤버를 결합하기 위하여 서로 면 접촉하는 테두리 부분이 반드시 존재하게 되는데, 이러한 테두리는 차량에 조립한 경우 차량 중량의 증가를 초래하여 차량의 경량화 관점에서 좋지 않은 문제점을 가지고 있다.In addition, as in the example of the conventional front side member, there is necessarily an edge portion which is in surface contact with each other in order to join the upper and lower members. Such an edge causes an increase in the weight of the vehicle when assembled to the vehicle, thereby reducing the weight of the vehicle. It has a bad problem from the point of view.

또한, 종래의 프론트 사이드 멤버 등 차량의 부품을 제작하는 경우에는 제조 공정이 복잡하여 작업 공수가 증대되어 생산비용이 증대되는 문제점을 가지고 있다.In addition, when manufacturing the parts of the vehicle, such as the conventional front side member has a problem that the manufacturing process is complicated and the labor cost is increased to increase the production cost.

따라서 본 발명은 상기한 문제점을 해결하기 위하여 제안된 것으로서, 본 발명의 목적은 비교적 간단한 공정을 통하여 프론트 사이드 멤버 등의 차량 부품을 제작하여 생산비용을 줄임과 아울러 불필요한 스크랩이 발생하지 않도록 하여 원자재의 활용을 극대화하여 제조원가를 줄이는 하이드로 성형에 의한 차량용 부품의 제조 방법을 제공하는데 있다.Accordingly, the present invention has been proposed to solve the above problems, and an object of the present invention is to manufacture a vehicle part such as a front side member through a relatively simple process to reduce production costs and to prevent unnecessary scraps from occurring. It is to provide a method for manufacturing a vehicle part by hydro-molding to maximize the utilization to reduce the manufacturing cost.

본 발명의 또 다른 목적은 프론트 사이드 멤버 등의 차량 부품을 제작할 때 불필요하게 발생할 수 있는 테두리 부분이 발생되지 않도록 하여 차량에 부품을 장착하는 경우 차량의 경량화에 기인하기 위한 하이드로 성형에 의한 차량용 부품의 제조 방법을 제공하는데 있다.It is still another object of the present invention to prevent the occurrence of unnecessary edges when manufacturing a vehicle part such as a front side member, so that when the component is mounted on the vehicle, the parts of the vehicle are formed by hydroforming due to the weight reduction of the vehicle. It is to provide a manufacturing method.

상기의 목적을 달성하기 위하여 본 발명은, 강판의 원자재를 폴 포머에 의하여 중공부를 가지는 튜브로 제작하는 단계; 상기 튜브의 중공부에 액체를 채우고 액체가 새지 않도록 양단을 실링하는 단계; 상기 튜브를 하이드로 성형 금형에 배치한 후 상기 튜브의 실링부측에서 상기 튜브의 내부의 압력을 증대시켜 금형의 형상대로 튜브를 성형하는 단계를 포함하는 하이드로 성형에 의한 차량용 부품의 제조 방법을 제공한다.In order to achieve the above object, the present invention comprises the steps of: manufacturing a raw material of the steel sheet as a tube having a hollow portion by a pole former; Filling a hollow portion of the tube and sealing both ends so that the liquid does not leak; After placing the tube in the hydro-molding mold provides a method for producing a vehicle component by hydro-molding comprising the step of forming a tube in the shape of the mold by increasing the pressure inside the tube at the sealing portion side of the tube.

도 1은 본 발명에 따른 실시예를 설명하기 위하여 롤 성형된 튜브의 형상을 도시한 도면이다.1 is a view showing the shape of a roll-shaped tube for explaining an embodiment according to the present invention.

도 2는 도 1에서 롤 성형된 튜브를 하이드로 성형을 한 튜브의 형상을 도시한 도면이다.FIG. 2 is a view illustrating a shape of a tube in which a roll-shaped tube is hydro-formed in FIG. 1.

도 3은 도 2에 따라 제작된 프론트 사이드 멤버의 형상을 도시한 도면이다.3 is a view illustrating the shape of a front side member manufactured according to FIG. 2.

도 4는 도 3의 A-A 부를 절개하여 도시한 단면도이다.4 is a cross-sectional view taken along the line A-A of FIG.

도 5는 종래의 프론트 사이드 멤버를 도시한 도면이다.5 is a diagram illustrating a conventional front side member.

도 6은 도5의 B-B부를 절개하여 도시한 단면도이다.FIG. 6 is a cross-sectional view of the B-B portion of FIG. 5 taken away.

이하, 첨부 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 실시예를 설명하기 위한 롤 포밍에 의하여 만들어진 튜브를 도시하고 있다. 롤 포머는 고장력의 강판을 원통 형상의 튜브(1)로 제작하게 되는데, 이때 양단부를 제외하고는 완전히 밀폐될 수 있도록 고주파 용접에 의하여 강판이 연결되어 원통형상의 튜브(1)를 만든다. 상기 원통형상의 튜브(1)는 내부에 오일(oil) 등으로 이루어지는 유체를 채운 후 양단을 실링한다. 그리고 이러한 상태의 튜브를 프론트 사이드 멤버의 형상을 가지는 하이드로 성형 금형 안에 삽입하고 튜브(1)의 실링 부위를 통하여 내부의 유체 압력을 증대시킨다.1 shows a tube made by roll forming for explaining an embodiment according to the invention. The roll former is to produce a high-tensile steel sheet as a cylindrical tube (1), wherein the steel sheet is connected by high frequency welding to form a cylindrical tube (1) so that it can be completely sealed except at both ends. The cylindrical tube 1 seals both ends after filling a fluid made of oil or the like therein. Then, the tube in this state is inserted into the hydroforming mold having the shape of the front side member and increases the fluid pressure therein through the sealing portion of the tube 1.

계속해서 하이드로 성형 금형에 제공된 어퍼 및 로워 금형틀을 서로 밀착하여 상기 튜브(1)가 틀 속에 몰입되도록 한다. 그리고 계속해서 튜브(1) 내부의 유체 압력을 증대시키면 금형 형상으로 튜브(3)가 성형된다. 이와 같은 성형된 튜브(3)의 형상은 도 2에 도시하고 있다. 그리고 상기 성형된 튜브(3)의 내부 압력 및 실링을 제거하고, 양단을 절단하는 등 필요한 길이 부분을 절개하면 도 3과 같이 차량에 적용할 수 있는 멤버가 만들어진다. 도 3은 본 발명의 일 예로 차량용 프론트 사이드 멤버(5)를 제작한 예를 도시한 것이며, 본 발명은 이에 한정되는 것은 아니며, 내부에 공간이 제공되는 형태의 멤버는 어느 것이나 같은 방법으로 제작할 수 있다. 그리고 도 4는 도 3의 A-A부를 절개한 도시한 단면도로, 본 발명에 다른 하이드로 성형에 의한 차량용 부품의 제조 방법은 단면의 두께가 비교적 일정한 형태로 나타나는 것을 알 수 있다. 이것은 특정부위가 얇아져 일부가 약하게 성형되는 것을 방지할 수 있어 강도 및 내구성이 우수한 양질의 제품을 얻을 수 있다.Subsequently, the upper and lower molds provided in the hydroforming mold are brought into close contact with each other so that the tube 1 is immersed in the mold. Subsequently, when the fluid pressure inside the tube 1 is increased, the tube 3 is molded into a mold shape. The shape of such shaped tube 3 is shown in FIG. 2. In addition, by removing the internal pressure and the sealing of the molded tube 3, and cutting the necessary length portion, such as cutting both ends, the member can be applied to the vehicle as shown in FIG. 3 illustrates an example of manufacturing a front side member 5 for a vehicle as an example of the present invention. The present invention is not limited thereto, and any member having a form provided with a space may be manufactured in the same manner. have. And Figure 4 is a cross-sectional view showing the cut portion A-A of Figure 3, it can be seen that the thickness of the cross section is a method of manufacturing a vehicle component by hydroforming according to the present invention appears in a relatively constant shape. This makes it possible to prevent certain parts from being thinly molded, so that a good quality product with excellent strength and durability can be obtained.

이와 같이 본 발명은 하나의 튜브의 내부에 유압을 채워 성형하는 방법을 제공하여 원자재의 스크랩을 줄일 수 있고 부품의 수를 줄여 제조 원가를 절감할 수 있으며, 제조 공정이 간단하여 작업공수를 줄일 수 있어 생산비용을 절감할 수 있다.As such, the present invention provides a method of filling hydraulic pressure inside a single tube to reduce scrap of raw materials and to reduce manufacturing cost by reducing the number of parts, and to reduce labor due to a simple manufacturing process. The production cost can be reduced.

특히, 본원 발명은 차량의 프론트 사이드 멤버를 이루는 튜브가 일체로 제작되어 별도의 결합 테두리가 불필요하여 차량에 장착하는 경우에 차량의 경량화에 기인할 수 있는 효과가 있다.In particular, the present invention has an effect that may be due to the weight of the vehicle when the tube forming the front side member of the vehicle is integrally manufactured so that a separate coupling frame is unnecessary and is mounted on the vehicle.

Claims (4)

강판의 원자재를 폴 포머에 의하여 중공부를 가지는 튜브로 제작하는 단계;Manufacturing a raw material of the steel sheet into a tube having a hollow part by a pole former; 상기 튜브의 중공부에 액체를 채우고 액체가 새지 않도록 양단을 실링하는 단계;Filling a hollow portion of the tube and sealing both ends so that the liquid does not leak; 상기 튜브를 하이드로 성형 금형에 배치한 후 상기 튜브의 실링부측에서 상기 튜브의 내부의 압력을 증대시켜 금형의 형상대로 튜브를 성형하는 단계;Placing the tube in a hydroforming mold and then increasing the pressure inside the tube at the sealing portion side of the tube to mold the tube in the shape of a mold; 를 포함하는 하이드로 성형에 의한 차량용 부품의 제조 방법.Method for producing a vehicle component by hydroforming comprising a. 제1항에 있어서, 상기 액체는 오일로 이루어지는 하이드로 성형에 의한 차량용 부품의 제조 방법.The method for manufacturing a vehicle component according to claim 1, wherein the liquid is made of oil. 제1항에 있어서, 상기 튜브의 내부 압력을 증가시켜 금형이 형상대로 튜브를 성형하는 단계 후에 실링을 인출하고 상기 튜브의 내부에 채워진 유체를 제거하는 단계를 더 포함하는 하이드로 성형에 의한 차량용 부품의 제조 방법.The method of claim 1, further comprising: withdrawing the seal and removing the fluid filled in the tube after the step of forming the tube into a shape by increasing the internal pressure of the tube. Manufacturing method. 제1항에 있어서, 강판의 원자재를 폴 포머에 의하여 중공부를 가지는 튜브로 제작하는 단계에서 고주파 용접으로 인접하는 강판을 용접하여 중공 튜브를 제작하는 하이드로 성형에 의한 차량용 부품의 제조 방법.The method for manufacturing a vehicle component according to claim 1, wherein the raw material of the steel sheet is manufactured by forming a hollow tube by welding the steel sheets adjacent to each other by high frequency welding in the step of forming the tube having the hollow portion by a pole former.
KR1020020020665A 2002-04-16 2002-04-16 The manufacturing method of auto-body parts hydroforming process KR20030082111A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10175027A (en) * 1996-12-17 1998-06-30 Nippon Steel Corp Metallic tube for hydro-form
JPH11254052A (en) * 1997-12-23 1999-09-21 Gkn Sankey Ltd Hydro-forming method
KR20010015702A (en) * 1997-10-07 2001-02-26 아더 엘. 리 A hydroformed angled tubular part, and method and apparatus for making the same
KR100352004B1 (en) * 2000-01-18 2002-09-11 주식회사 성우하이텍 Method for making automotive bumper beam

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10175027A (en) * 1996-12-17 1998-06-30 Nippon Steel Corp Metallic tube for hydro-form
KR20010015702A (en) * 1997-10-07 2001-02-26 아더 엘. 리 A hydroformed angled tubular part, and method and apparatus for making the same
JPH11254052A (en) * 1997-12-23 1999-09-21 Gkn Sankey Ltd Hydro-forming method
KR100352004B1 (en) * 2000-01-18 2002-09-11 주식회사 성우하이텍 Method for making automotive bumper beam

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