WO2020111771A1 - Reinforcement structure for door of vehicle and forming method thereof - Google Patents

Reinforcement structure for door of vehicle and forming method thereof Download PDF

Info

Publication number
WO2020111771A1
WO2020111771A1 PCT/KR2019/016463 KR2019016463W WO2020111771A1 WO 2020111771 A1 WO2020111771 A1 WO 2020111771A1 KR 2019016463 W KR2019016463 W KR 2019016463W WO 2020111771 A1 WO2020111771 A1 WO 2020111771A1
Authority
WO
WIPO (PCT)
Prior art keywords
body frame
forming
door
reinforcing
side portion
Prior art date
Application number
PCT/KR2019/016463
Other languages
French (fr)
Korean (ko)
Inventor
이현영
박종연
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Publication of WO2020111771A1 publication Critical patent/WO2020111771A1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/042—Reinforcement elements
    • B60J5/0422—Elongated type elements, e.g. beams, cables, belts or wires
    • B60J5/0438—Elongated type elements, e.g. beams, cables, belts or wires characterised by the type of elongated elements
    • B60J5/0443—Beams
    • B60J5/0444—Beams characterised by a special cross section
    • 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
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/0412—Lower door structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/0002—Type of accident
    • B60R2021/0006—Lateral collision
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign

Definitions

  • the present invention relates to a reinforcing structure of a vehicle door and a molding method thereof.
  • a door impact beam 20 having a bending strength of a predetermined level or more is installed inside the normal vehicle door 10.
  • the door impact beam 20 serves to reduce the amount of the car door 10 entering the interior in the event of a side collision of the vehicle and to minimize the impact transmitted to passengers in the vehicle by allowing the impact of the side collision to be transmitted to the vehicle body.
  • a material having high tensile strength may be roll-formed in order to secure sufficient bending strength of the door impact beam.
  • molding through roll forming has many problems in the shape of the door impact beam, and there is a problem in that the degree of freedom is not high even in forming a structure in which the door impact beam is mounted on the door.
  • door impact beams can also be formed through hot press forming. Since this method requires the door impact beams to be manufactured with only one molding, there is a problem that the cross-sectional shape of the door impact beam is not only limited, but also the production cost is high. .
  • Patent Document 1 KR 20-1996-0033829 (1996.10.15)
  • An object of the present invention is to minimize the shape constraints of the reinforcing structure and minimize the cost consumed in production in molding the reinforcing structure of a vehicle door having a rigidity of a certain level or higher.
  • an object of the present invention is to provide a reinforcing structure of an automobile door with improved rigidity compared to the same weight and a method for forming the same.
  • the present invention provides a reinforcing structure of a vehicle door and a molding method therefor.
  • the reinforcing structure of the car door includes a body frame mounted on a car door, the cross section of the body frame protruding in one direction; and opposite to the center part on both sides of the center part.
  • a pair of side portions protruding in the direction;
  • a pair of reinforcing portions that are respectively connected to the pair of side portions and formed by rolling an end portion in a direction in which the side portion protrudes.
  • connection point of the center portion and the side portion and the connection point of the side portion and the reinforcement portion may be provided to be round.
  • the pair of side portions the first side portion leading to one side of the center portion; And a second side portion extending to the other side of the center portion, wherein the protruding heights of the first side portion and the second side portion may be different.
  • first side portion and the second side portion may have a predetermined width in a width direction of the body frame, and may include at least one curved region provided roundly.
  • the reinforcing part may include an end portion of the body frame, and at least a part of the end portion of the body frame may be curled so as to lie on a straight line parallel to an extension line of the tangent line of the curved region.
  • the body frame may be a first steel sheet having a tensile strength of at least 1180 MPa or a second steel sheet having a tensile strength of at least 1300 MPa.
  • a method for forming a reinforcing structure of an automobile door includes a first forming step of forming the center portion on a cross section of the body frame; And after the completion of the first forming step, a second forming step of simultaneously forming the side portion and the reinforcing portion on the cross section of the body frame; may include.
  • the center frame may be formed by pressing the body frame having a tensile strength of at least 1180 MPa once.
  • the center frame may be formed by pressing the body frame having a tensile strength of at least 1300 MPa twice.
  • first forming step and the second forming step may form the center portion, the side portion, and the reinforcing portion by cold press molding.
  • stiffness can be improved without increasing the weight of the reinforcing structure of the automobile door.
  • FIG. 1 schematically shows a conventional automobile door.
  • FIG. 2 is a perspective view of a reinforcing structure of an automobile door according to the present invention.
  • FIG 3 is a plan view of a reinforcing structure of an automobile door according to the present invention.
  • FIG. 4 is a front view of a reinforcing structure of an automobile door according to the present invention.
  • FIG. 5 is a bottom view of a reinforcing structure of an automobile door according to the present invention.
  • FIG. 11 schematically shows a method of forming a reinforcing structure of an automobile door of the present invention.
  • FIG. 12 is a view showing a reinforcing structure of a vehicle door according to an embodiment of the present invention.
  • FIG. 13 is a view showing a reinforcing structure of a vehicle door according to another embodiment of the present invention.
  • FIG. 14 is a bending strength measurement result of a reinforcing structure of a vehicle door according to the present invention, a hot press-formed reinforcing structure, and a reinforcing structure formed without a reinforcing part.
  • the X-axis shown in the accompanying drawings is the longitudinal direction of the reinforcing structure of the car door
  • the Y-axis is the width direction of the reinforcing structure of the car door
  • the Z-axis is the thickness direction of the reinforcing structure of the car door.
  • this direction may be changed due to the characteristics of the steel sheet being molded and the characteristics of the molding process.
  • the reinforcing structure of the car door may include a body frame 110 mounted on the car door.
  • the body frame 110 may be obtained by cold pressing a single steel sheet of 1.6T made of ultra high strength steel, and the cross section may be an open cross section.
  • the outer shape of the molded body frame 110 is provided at both ends with a mounting portion 113 that can be combined with an automobile door or other automobile parts, and between the mounting portions 113 may have a curved shape in the Y-axis direction. .
  • a pair of side portions 111 protruding in the Z-axis direction, and a center portion 112 protruding in a direction opposite to the Z-axis may be provided between the side portions 111, and a pair of the side portions 111 ) May have a reinforcing portion 120, respectively.
  • the reinforcing part 120 may be provided with a flange having a curl of a certain curvature, the end of which is rolled toward the direction in which the side part 111 protrudes.
  • the reinforcing part 120 since the secondary moment of section increases, it is possible to improve the rigidity of the reinforcing structure of the car door without increasing the weight of the body frame.
  • the body frame 110 has a connection point 130 and a side part and a reinforcement part 120 of the center part 112 and the side part 111.
  • the connection point 140 of may be provided to be round.
  • the side portion 111 is connected to one side of the center portion 112, the first side portion 211 having a predetermined width in the Y-axis direction and the second side portion connected to the other side of the center portion having a predetermined width in the Y-axis direction. 311, the height of the first side portion protruding in the Z axis and the height of the second side portion protruding in the Z axis may be different from each other.
  • the value of the height and the width in the Y-axis direction can be appropriately selected and applied according to the specifications of the required automobile door.
  • the side portion including the first side portion and the second side portion, the center portion, and the reinforcing portion may be formed by cold press forming, first drawing the center portion, and then drawing or bending the side portion and the reinforcing portion at the same time. .
  • the center portion when forming the body frame 110 with a steel sheet having a tensile strength of 1180 MPa, the center portion may be deep-drawn once. As another embodiment, when forming a body frame with a steel sheet having a tensile strength of 1300 MPa, The center part can be divided into two parts for drawing or deep drawing.
  • the center portion 112 includes a first curved region 112a in an area adjacent to the side portion 111, and the first side portion also includes a pair of second curved regions 211a.
  • the second side portion also includes a pair of third curved regions 311a.
  • the curvature of the first curved region 112a is within 4.5 times the thickness of the body frame 110, and the curvature of the second curved region 211a is within 5.5 times the thickness of the body frame 210, and the third curved region. Molding such that the curvature of (311a) is within 3.5 times may be effective in preventing wrinkles and fractures.
  • first curved region 112a is provided on both sides of the center portion 112
  • the second curved region 211a may also be provided on both sides of the first side portion 21
  • the third curved region ( 311a) may also be provided on both sides of the second side portion 311.
  • the reinforcing portion 120 includes an end portion 110a of the body frame 110, and may be up to a predetermined area in the Y-axis direction or the Y-axis direction from the end of the body frame, respectively.
  • the first reinforcing portion 121 following the first side portion 211 may have a first curvature portion 121a formed by curling to have a curvature within 3.5 times the thickness of the body frame 110, and 2
  • the second reinforcing portion 122 following the side portion 311 may also have a second curvature portion 122a formed by curling to have a curvature within 3.5 times the thickness of the body frame 110.
  • the extension line L 4 of the end portion 110a of the body frame 110 and the extension line L 3 of the tangent line of the second curved region 211a are Curling the first reinforcing part 121 within a range lying parallel to each other, the extension line L 2 of another end 110a present on the other side of the body frame 110 is also connected to the tangent line of the third curved area 311a. It may be desirable to curl the second reinforcement 122 within a range lying parallel to the extension line L 1 .
  • curled first and second reinforcing parts 121 and 122 it is possible to maximize the cross-sectional secondary moment within a range that minimizes wrinkles and breakage when forming the body frame 110.
  • the shortest distance between the extension line L 4 of the end portion 110a of the body frame 110 and the extension line L 3 of the tangent line of the second curved area 211a is a coupling structure with a car door, and with other parts. It can be appropriately selected and applied depending on whether or not there is interference, and it is preferable to apply it in consideration of a structure capable of increasing the sectional secondary moment as much as possible within the allowable range.
  • FIG. 8 shows the results of CAE analysis of the body frame 110 according to an embodiment of the present invention
  • FIG. 9 shows a case where the body frame of the present invention is cold-pressed using a steel plate made of a trip steel having a tensile strength of 1180 MPa. (T1180 1.6T), and the deformation section spanning 150mm when hot-press-molded a steel sheet having a tensile strength of 1470 MPa (H1470 1.6T) is shown, and it can be seen that they have a gap (G) of force.
  • the body frame according to the present invention (T1180 1.6T) requires a greater force than the hot press-formed steel plate having a tensile strength of 1470 MPa in a deformation section spanning 150 mm (H1470 1.6T).
  • a steel sheet having a lower tensile strength than a hot press-formed steel sheet can be cold pressed to secure higher rigidity than the hot-press-formed steel sheet.
  • FIG. 10 shows the maximum load, the maximum displacement, the three experimental values of the collision resistance and the average values of the reinforced structures of the car door with the body frame (110 in FIG. 8) according to the present invention, and these are hot presses under the same conditions. It has a higher bending strength than the molded steel sheet.
  • the present invention as another aspect provides a method for forming a reinforcing structure of an automobile door above.
  • the molding method according to the present invention as shown in Figure 11, the first forming step (S210) and the first forming step of forming the center portion (112 in Figure 6) on the cross section of the body frame (110 in Figure 6) Thereafter, a second forming step (S220) of simultaneously forming the side part (111 of FIG. 6) and the reinforcing part (120 of FIG. 6) on a cross section of the body frame (110 of FIG. 6 ).
  • the first forming step may cold press mold the center portion 112 by pressing the body frame 110 having a tensile strength of at least 1180 MPa once.
  • the center portion 112 may be deep-drawn, and the depth in the direction opposite to the Z-axis of the center portion 112 as the final target may be completed by one movement of the mold.
  • the body frame 110 may be pressed twice to form the center portion 112.
  • This may be appropriately selected and applied according to physical properties including ductility of a steel sheet forming a body frame, molding conditions, and the like.
  • a steel sheet having a tensile strength of 1470 MPa is used for hot press molding (HPF 1.6T) the shape of the reinforcing structure of the same automobile door as the present invention, and cold press molding of a steel sheet made of trip steel having a tensile strength of 1180 MPa.
  • (TRIP 1.6T) the bending strength value is shown.
  • the bending strength values indicate values of 12.9, 11.8, and 13.4, respectively.
  • the reinforcing structure of the automobile door according to the present invention has a higher bending strength than that of hot press forming a steel sheet having a higher tensile strength, and the same tensile strength. It can be seen that the steel sheet having a has a higher strength than when cold-pressed without a reinforcement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The present invention provides a reinforcement structure for a door of a vehicle and a forming method thereof. First, the reinforcement structure for a door of a vehicle, according to the present invention, comprises a body frame mounted on a door of a vehicle, wherein the cross-section of the body frame may comprise: a center part protruding in one direction; a pair of side parts protruding in the opposite direction from the center part from both sides of the center part; and a pair of reinforcement parts respectively connected to the pair of side parts and formed so that the respective end parts thereof are rolled up in the protruding direction of the side parts.

Description

자동차 도어의 보강구조체 및 이의 성형방법Reinforcement structure of automobile door and its molding method
본 발명은 자동차 도어의 보강구조체 및 이의 성형방법에 관한 것이다.The present invention relates to a reinforcing structure of a vehicle door and a molding method thereof.
도 1에서 보이듯, 통상의 자동차 도어(10)의 내부에는 일정 수준 이상의 굽힘강도를 가진 도어 임팩트 빔(20)이 설치된다.As shown in FIG. 1, a door impact beam 20 having a bending strength of a predetermined level or more is installed inside the normal vehicle door 10.
도어 임팩트 빔(20)은 자동차의 측면 충돌 시에 자동차 도어(10)가 실내로 침입되는 양을 줄이고, 측면 충돌의 충격이 차체로 전달되게 하여 차내 승객에게 전달되는 충격을 최소화하는 역할을 한다.The door impact beam 20 serves to reduce the amount of the car door 10 entering the interior in the event of a side collision of the vehicle and to minimize the impact transmitted to passengers in the vehicle by allowing the impact of the side collision to be transmitted to the vehicle body.
열린 단면을 가지는 도어 임팩트 빔을 성형하는 과정에서 도어 임팩트 빔의 충분한 굽힘강도의 확보를 위해서는 높은 인장강도를 가지는 소재를 롤포밍할 수 있다.In the process of forming a door impact beam having an open cross-section, a material having high tensile strength may be roll-formed in order to secure sufficient bending strength of the door impact beam.
그런데 롤포밍을 통한 성형은 도어 임팩트 빔의 형상에 많은 제약이 따르고, 도어 임팩트 빔이 도어에 장착되는 구조를 성형함에 있어서도 그 자유도가 높지 않은 문제가 있다.However, molding through roll forming has many problems in the shape of the door impact beam, and there is a problem in that the degree of freedom is not high even in forming a structure in which the door impact beam is mounted on the door.
한편, 핫프레스 포밍을 통해서도 도어 임팩트 빔을 성형할 수 있는데 이러한 방법은 한번의 성형만으로 도어 임팩트 빔을 제조하여야 하므로 도어 임팩트 빔의 단면 형상에도 제약이 따를 뿐만 아니라, 생산비용 또한 비싸진다는 문제가 있다.On the other hand, door impact beams can also be formed through hot press forming. Since this method requires the door impact beams to be manufactured with only one molding, there is a problem that the cross-sectional shape of the door impact beam is not only limited, but also the production cost is high. .
(특허문헌 1) KR 20-1996-0033829 (1996.10.15)(Patent Document 1) KR 20-1996-0033829 (1996.10.15)
본 발명은 일정수준 이상의 강성을 가지는 자동차 도어의 보강구조체를 성형함에 있어서 보강구조체의 형상 제약을 최소화하고, 생산에 소모되는 비용을 최소화하는 것을 일 목적으로 한다.An object of the present invention is to minimize the shape constraints of the reinforcing structure and minimize the cost consumed in production in molding the reinforcing structure of a vehicle door having a rigidity of a certain level or higher.
또한, 동일 중량 대비 강성이 향상된 자동차 도어의 보강구조체 및 그 성형방법을 제공함을 일 목적으로 한다.In addition, an object of the present invention is to provide a reinforcing structure of an automobile door with improved rigidity compared to the same weight and a method for forming the same.
본 발명은 자동차 도어의 보강구조체 및 이의 성형방법을 제공한다.The present invention provides a reinforcing structure of a vehicle door and a molding method therefor.
먼저 본 발명에 따른 자동차 도어의 보강구조체는 자동차 도어에 장착되는 바디프레임;을 포함하되, 상기 바디프레임의 단면은, 일 방향으로 돌출된 센터부;와, 상기 센터부의 양측에서 상기 센터부와 반대방향으로 돌출된 한 쌍의 사이드부; 및 한 쌍의 상기 사이드부에 각각 이어지고, 단부를 상기 사이드부가 돌출된 방향으로 말아 올려 형성한 한 쌍의 보강부;를 포함할 수 있다.First, the reinforcing structure of the car door according to the present invention includes a body frame mounted on a car door, the cross section of the body frame protruding in one direction; and opposite to the center part on both sides of the center part. A pair of side portions protruding in the direction; And a pair of reinforcing portions that are respectively connected to the pair of side portions and formed by rolling an end portion in a direction in which the side portion protrudes.
또한, 상기 센터부와 상기 사이드부의 연결지점 및 상기 사이드부와 상기 보강부의 연결지점은 라운드지게 구비될 수 있다.In addition, the connection point of the center portion and the side portion and the connection point of the side portion and the reinforcement portion may be provided to be round.
또한, 한 쌍의 상기 사이드부는, 상기 센터부의 일측으로 이어지는 제1 사이드부; 및 상기 센터부의 타측으로 이어지는 제2 사이드부;를 포함하되, 상기 제1 사이드부 및 상기 제2 사이드부의 돌출 높이는 서로 다를 수 있다.In addition, the pair of side portions, the first side portion leading to one side of the center portion; And a second side portion extending to the other side of the center portion, wherein the protruding heights of the first side portion and the second side portion may be different.
또한, 상기 제1 사이드부 및 상기 제2 사이드부는, 상기 바디프레임의 폭방향으로 일정 폭을 가지며, 라운드지게 구비된 곡선영역;을 적어도 하나씩 구비할 수 있다.In addition, the first side portion and the second side portion may have a predetermined width in a width direction of the body frame, and may include at least one curved region provided roundly.
또한, 상기 보강부는, 상기 바디프레임의 단부를 포함하며, 상기 바디프레임의 단부의 적어도 일부가 상기 곡선영역의 접선의 연장선과 평행한 직선 상에 놓이도록 컬링(curling)될 수 있다.Further, the reinforcing part may include an end portion of the body frame, and at least a part of the end portion of the body frame may be curled so as to lie on a straight line parallel to an extension line of the tangent line of the curved region.
또한, 상기 바디프레임은, 인장강도가 적어도 1180 MPa인 제1 강판 또는 인장강도가 적어도 1300 MPa인 제2 강판으로 될 수 있다.Further, the body frame may be a first steel sheet having a tensile strength of at least 1180 MPa or a second steel sheet having a tensile strength of at least 1300 MPa.
한편, 본 발명에 따른 자동차 도어의 보강구조체 성형방법은 상기 바디프레임의 단면에 상기 센터부를 성형하는 제1 성형단계; 및 상기 제1 성형단계 완료 이후, 상기 바디프레임의 단면에 상기 사이드부 및 상기 보강부를 동시에 성형하는 제2 성형단계;를 포함할 수 있다.On the other hand, a method for forming a reinforcing structure of an automobile door according to the present invention includes a first forming step of forming the center portion on a cross section of the body frame; And after the completion of the first forming step, a second forming step of simultaneously forming the side portion and the reinforcing portion on the cross section of the body frame; may include.
또한, 상기 제1 성형단계는, 인장강도가 적어도 1180 MPa인 상기 바디프레임을 1회 가압하여 상기 센터부를 성형할 수 있다.In addition, in the first forming step, the center frame may be formed by pressing the body frame having a tensile strength of at least 1180 MPa once.
또한, 상기 제1 성형단계는, 인장강도가 적어도 1300 MPa인 상기 바디프레임을 2회 가압하여 상기 센터부를 성형할 수 있다.In addition, in the first forming step, the center frame may be formed by pressing the body frame having a tensile strength of at least 1300 MPa twice.
또한, 상기 제1 성형단계 및 상기 제2 성형단계는, 냉간 프레스 성형으로 상기 센터부, 상기 사이드부 및 상기 보강부를 성형할 수 있다.In addition, the first forming step and the second forming step may form the center portion, the side portion, and the reinforcing portion by cold press molding.
본 발명에 따르면 자동차 도어의 보강구조체의 형상 제약을 최소화하고, 생산에 소모되는 비용을 최소화할 수 있다.According to the present invention, it is possible to minimize the shape constraints of the reinforcing structure of the automobile door and minimize the cost consumed in production.
또한, 자동차 도어의 보강구조체의 중량의 증가 없이도 강성을 향상시킬 수 있다.In addition, stiffness can be improved without increasing the weight of the reinforcing structure of the automobile door.
도 1은 통상의 자동차 도어를 개략적으로 도시한 것이다.1 schematically shows a conventional automobile door.
도 2는 본 발명에 따른 자동차 도어의 보강구조체의 사시도이다.2 is a perspective view of a reinforcing structure of an automobile door according to the present invention.
도 3은 본 발명에 따른 자동차 도어의 보강구조체의 평면도이다.3 is a plan view of a reinforcing structure of an automobile door according to the present invention.
도 4는 본 발명에 따른 자동차 도어의 보강구조체의 정면도이다.4 is a front view of a reinforcing structure of an automobile door according to the present invention.
도 5는 본 발명에 따른 자동차 도어의 보강구조체의 저면도이다.5 is a bottom view of a reinforcing structure of an automobile door according to the present invention.
도 6은 도 3의 A-A'이다.6 is A-A' of FIG. 3.
도 7은 도 3의 A-A'이다.7 is A-A' of FIG. 3.
도 8은 본 발명에 따른 자동차 도어의 보강구조체의 CAE 해석결과이다.8 is a CAE analysis result of a reinforcing structure of an automobile door according to the present invention.
도 9는 본 발명에 따른 자동차 도어의 보강구조체와 핫프레스 성형한 보강구조체의 힘-변형량 측정 결과이다.9 is a result of measuring the force-strain of a reinforcing structure of a vehicle door and a hot press-formed reinforcing structure according to the present invention.
도 10은 본 발명에 따른 자동차 도어의 보강구조체의 물성 시험 결과이다.10 is a test result of the physical properties of the reinforcing structure of the vehicle door according to the present invention.
도 11은 본 발명의 자동차 도어의 보강구조체의 성형방법을 개략적으로 도시한 것이다.11 schematically shows a method of forming a reinforcing structure of an automobile door of the present invention.
도 12는 본 발명의 일 실시 예에 따른 자동차 도어의 보강구조체를 도시한 것이다.12 is a view showing a reinforcing structure of a vehicle door according to an embodiment of the present invention.
도 13은 본 발명의 또 다른 일 실시 예에 따른 자동차 도어의 보강구조체를 도시한 것이다.13 is a view showing a reinforcing structure of a vehicle door according to another embodiment of the present invention.
도 14는 본 발명에 따른 자동차 도어의 보강구조체, 핫프레스 성형한 보강구조체, 보강부없이 성형한 보강구조체의 굽힘강도 측정결과이다.14 is a bending strength measurement result of a reinforcing structure of a vehicle door according to the present invention, a hot press-formed reinforcing structure, and a reinforcing structure formed without a reinforcing part.
본 발명의 실시 예에 관한 설명의 이해를 돕기 위하여 첨부된 도면에 동일한 부호로 기재된 요소는 동일한 요소이고, 각 실시 예에서 동일한 작용을 하게 되는 구성요소 중 관련된 구성요소는 동일 또는 연장 선상의 숫자로 표기하였다. In order to help the understanding of the description of the embodiments of the present invention, the elements indicated by the same reference numerals in the accompanying drawings are the same elements, and among the elements that perform the same action in each embodiment, related elements are the same or a number on the extension line. Notation.
또한, 본 발명의 요지를 명확히 하기 위하여 종래의 기술에 의해 익히 알려진 요소와 기술에 대한 설명은 생략하며, 이하에서는, 첨부된 도면을 참고로 하여 본 발명에 관하여 상세히 설명하도록 한다.In addition, in order to clarify the gist of the present invention, descriptions of elements and techniques well known by the prior art will be omitted, and hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
다만, 본 발명의 사상은 제시되는 실시 예에 제한되지 아니하고, 당업자에 의해 특정 구성요소가 추가, 변경, 삭제된 다른 형태로도 제안될 수 있을 것이나, 이 또한 본 발명과 동일한 사상의 범위 내에 포함됨을 밝혀 둔다.However, the spirit of the present invention is not limited to the presented embodiments, and specific components may be added, changed, or deleted by other skilled artisans, but also included within the scope of the same spirit as the present invention. Reveals.
첨부된 도면에 도시된 X축은 자동차 도어의 보강구조체의 길이 방향이고, Y축은 자동차 도어의 보강구조체의 폭 방향이며, Z축은 자동차 도어의 보강구조체의 두께 방향이다. 다만, 이 방향은 성형되는 강판의 특성 및 성형 공정의 특성상 변경될 수 있다.The X-axis shown in the accompanying drawings is the longitudinal direction of the reinforcing structure of the car door, the Y-axis is the width direction of the reinforcing structure of the car door, and the Z-axis is the thickness direction of the reinforcing structure of the car door. However, this direction may be changed due to the characteristics of the steel sheet being molded and the characteristics of the molding process.
도 2 내지 도 5에는 본 발명의 일 실시 예에 따른 자동차 도어의 보강구조체의 외형이 도시되어 있다.2 to 5 show the outer shape of the reinforcing structure of the vehicle door according to an embodiment of the present invention.
도 2 내지 도 5에서 보이듯, 본 발명의 일 실시 예에 따른 자동차 도어의 보강구조체는 자동차 도어에 장착되는 바디프레임(110)을 포함할 수 있다.2 to 5, the reinforcing structure of the car door according to an embodiment of the present invention may include a body frame 110 mounted on the car door.
이 바디프레임(110)은 초고강도강으로 된 1.6T의 단일 강판을 냉간 프레스 성형하여 얻어질 수 있고, 그 단면은 열린 단면일 수 있다.The body frame 110 may be obtained by cold pressing a single steel sheet of 1.6T made of ultra high strength steel, and the cross section may be an open cross section.
성형 완료된 바디프레임(110)의 외형은 양단부는 자동차 도어 내지는 다른 자동차 부품들과 결합될 수 있는 장착부(113)로 마련되고, 장착부(113)들 사이로는 Y축 방향으로 굴곡진 형태를 가질 수 있다.The outer shape of the molded body frame 110 is provided at both ends with a mounting portion 113 that can be combined with an automobile door or other automobile parts, and between the mounting portions 113 may have a curved shape in the Y-axis direction. .
구체적으로 Z축 방향으로 돌출된 한 쌍의 사이드부(111), 상기 사이드부(111) 사이에서 Z축 반대 방향으로 돌출된 센터부(112)를 가질 수 있고, 한 쌍의 상기 사이드부(111)에는 각각 보강부(120)가 이어질 수 있다.Specifically, a pair of side portions 111 protruding in the Z-axis direction, and a center portion 112 protruding in a direction opposite to the Z-axis may be provided between the side portions 111, and a pair of the side portions 111 ) May have a reinforcing portion 120, respectively.
보강부(120)는 그 단부가 상기 사이드부(111)가 돌출된 방향 쪽으로 말아 올려져, 일정 곡률의 컬을 가지는 플랜지(Curled Flange)로 제공될 수 있다.The reinforcing part 120 may be provided with a flange having a curl of a certain curvature, the end of which is rolled toward the direction in which the side part 111 protrudes.
이와 같은 보강부(120)에 따르면 단면2차모멘트가 증가되므로 바디프레임의 중량 증가 없이도 자동차 도어의 보강구조체의 강성을 향상시킬 수 있는 효과가 있다.According to the reinforcing part 120, since the secondary moment of section increases, it is possible to improve the rigidity of the reinforcing structure of the car door without increasing the weight of the body frame.
따라서 이는, 자동차 전체의 경량화에 기여할 수 있다.Therefore, this can contribute to weight reduction of the entire vehicle.
도 6을 참조로 하여 바디프레임(110)의 단면을 설명하면, 상기 바디프레임(110)은 센터부(112)와 사이드부(111)의 연결지점(130) 및 사이드부와 보강부(120)의 연결지점(140)이 라운드지게 구비될 수 있다.Referring to FIG. 6, the cross section of the body frame 110 is described, the body frame 110 has a connection point 130 and a side part and a reinforcement part 120 of the center part 112 and the side part 111. The connection point 140 of may be provided to be round.
상기 사이드부(111)는 센터부(112)의 일측으로 이어져 Y축 방향으로 일정 너비를 가지는 제1 사이드부(211) 및 상기 센터부의 타측으로 이어져 Y축 방향으로 일정 너비를 가지는 제2 사이드부(311)를 포함할 수 있는데, 상기 제1 사이드부가 Z축으로 돌출된 높이와 제2 사이드부가 Z축으로 돌출된 높이는 서로 다를 수 있다.The side portion 111 is connected to one side of the center portion 112, the first side portion 211 having a predetermined width in the Y-axis direction and the second side portion connected to the other side of the center portion having a predetermined width in the Y-axis direction. 311, the height of the first side portion protruding in the Z axis and the height of the second side portion protruding in the Z axis may be different from each other.
제1 사이드부(211) 및 제2 사이드부(311)의 Z축으로 돌출된 높이가 서로 다르면 자동차 도어의 보강구조체의 조립 자유도가 높아지고, 다른 부품들과 호환성이 좋아질 수 있다.When the heights protruding from the Z-axis of the first side part 211 and the second side part 311 are different from each other, the degree of freedom of assembling the reinforcing structure of the automobile door increases, and compatibility with other parts may be improved.
그 높이 및 Y축 방향으로 가지는 너비의 값은 요구되는 자동차 도어의 사양에 의해 적절히 선택되어 적용될 수 있다.The value of the height and the width in the Y-axis direction can be appropriately selected and applied according to the specifications of the required automobile door.
상기 제1 사이드부 및 상기 제2 사이드부를 포함하는 사이드부, 상기 센터부 및 상기 보강부는 냉간 프레스 성형되어 형성될 수 있는데 먼저 센터부를 드로잉한 후, 사이드부 및 보강부를 동시에 드로잉 또는 벤딩할 수 있다.The side portion including the first side portion and the second side portion, the center portion, and the reinforcing portion may be formed by cold press forming, first drawing the center portion, and then drawing or bending the side portion and the reinforcing portion at the same time. .
일 실시 예로서 인장강도 1180MPa을 가지는 강판으로 바디프레임(110)을 성형할 경우에는 센터부를 1회 딥드로잉할 수 있고, 또 다른 실시 예로서 인장강도 1300MPa을 가지는 강판으로 바디프레임을 성형할 경우에는 센터부를 2회로 나누어 드로잉 또는 딥드로잉할 수 있다.As an example, when forming the body frame 110 with a steel sheet having a tensile strength of 1180 MPa, the center portion may be deep-drawn once. As another embodiment, when forming a body frame with a steel sheet having a tensile strength of 1300 MPa, The center part can be divided into two parts for drawing or deep drawing.
다만, 이는 반드시 본 발명에 의해 한정되는 것은 아니며, 강판의 연성, 침입률 등을 고려하여 당업자에 의해 적절히 선택되어 적용될 수 있는 사항이다.However, this is not necessarily limited by the present invention, and is a matter that can be appropriately selected and applied by a person skilled in the art in consideration of ductility and penetration rate of the steel sheet.
한편, 도 7에서 보이듯, 센터부(112)는 사이드부(111)와 이웃하는 영역에 제1 곡선영역(112a)을 각각 포함하며, 제1 사이드부도 한 쌍의 제2 곡선영역(211a)을 포함하고, 제2 사이드부도 한 쌍의 제3 곡선영역(311a)을 포함한다.Meanwhile, as shown in FIG. 7, the center portion 112 includes a first curved region 112a in an area adjacent to the side portion 111, and the first side portion also includes a pair of second curved regions 211a. In addition, the second side portion also includes a pair of third curved regions 311a.
이때, 제1 곡선영역(112a)의 곡률은 바디프레임(110)의 두께의 4.5배 이내, 제2 곡선영역(211a)의 곡률은 바디프레임(210)의 두께의 5.5배 이내, 제3 곡선영역(311a)의 곡률은 3.5배 이내가 되도록 성형하는 것이 주름 및 파단을 예방하는 것에 효과적일 수 있다.At this time, the curvature of the first curved region 112a is within 4.5 times the thickness of the body frame 110, and the curvature of the second curved region 211a is within 5.5 times the thickness of the body frame 210, and the third curved region. Molding such that the curvature of (311a) is within 3.5 times may be effective in preventing wrinkles and fractures.
또한, 제1 곡선영역(112a)이 센터부(112)의 양측에 마련되듯이, 제2 곡선영역(211a)도 제1 사이드부(21)의 양측에 마련될 수 있고, 제3 곡선영역(311a)도 제2 사이드부(311)의 양측에 마련될 수 있다.In addition, as the first curved region 112a is provided on both sides of the center portion 112, the second curved region 211a may also be provided on both sides of the first side portion 21, and the third curved region ( 311a) may also be provided on both sides of the second side portion 311.
한편, 보강부(120)는 바디프레임(110)의 단부(110a)를 포함하고, 상기 바디프레임의 단부에서부터 각각 Y축 방향 또는 Y축 반대 방향으로 일정 영역까지가 될 수 있다.On the other hand, the reinforcing portion 120 includes an end portion 110a of the body frame 110, and may be up to a predetermined area in the Y-axis direction or the Y-axis direction from the end of the body frame, respectively.
이때, 제1 사이드부(211)에 이어지는 제1 보강부(121)는 바디프레임(110)의 두께의 3.5배 이내의 곡률을 갖도록 컬링되어 형성된 제1 곡률부(121a)를 가질 수 있고, 제2 사이드부(311)에 이어지는 제2 보강부(122) 또한 바디프레임(110)의 두께의 3.5배 이내의 곡률을 갖도록 컬링되어 형성된 제2 곡률부(122a)를 가질 수 있다. At this time, the first reinforcing portion 121 following the first side portion 211 may have a first curvature portion 121a formed by curling to have a curvature within 3.5 times the thickness of the body frame 110, and 2 The second reinforcing portion 122 following the side portion 311 may also have a second curvature portion 122a formed by curling to have a curvature within 3.5 times the thickness of the body frame 110.
다만, 상기와 같이 제1 보강부(121)를 컬링할 때, 바디프레임(110)의 단부(110a)의 연장선(L 4)이 제2 곡선영역(211a)의 접선의 연장선(L 3)과 평행하게 놓이는 범위 내에서 제1 보강부(121)를 컬링하고, 바디프레임(110)의 타측에 존재하는 또 다른 단부(110a)의 연장선(L 2) 또한 제3 곡선영역(311a)의 접선의 연장선(L 1)과 평행하게 놓이는 범위 내에서 제2 보강부(122)를 컬링하는 것이 바람직할 수 있다.However, when curling the first reinforcing part 121 as described above, the extension line L 4 of the end portion 110a of the body frame 110 and the extension line L 3 of the tangent line of the second curved region 211a are Curling the first reinforcing part 121 within a range lying parallel to each other, the extension line L 2 of another end 110a present on the other side of the body frame 110 is also connected to the tangent line of the third curved area 311a. It may be desirable to curl the second reinforcement 122 within a range lying parallel to the extension line L 1 .
이와 같은 컬링 가공된 제1,2 보강부(121,122)에 따르면 바디프레임(110)의 성형 시에 주름 및 파단을 최소화하는 범위 내에서 단면2차모멘트를 최대화시킬 수 있다.According to the curled first and second reinforcing parts 121 and 122, it is possible to maximize the cross-sectional secondary moment within a range that minimizes wrinkles and breakage when forming the body frame 110.
다만, 바디프레임(110)의 단부(110a)의 연장선(L 4)과 제2 곡선영역(211a)의 접선의 연장선(L 3) 사이의 최단거리는 자동차 도어와의 결합 구조, 다른 부품들과의 간섭 여부 등에 의해 적절히 선택되어 적용될 수 있는데, 허용된 범위 내에서 단면2차모멘트를 최대한 늘릴 수 있는 구조를 고려하여 적용하는 것이 바람직하다.However, the shortest distance between the extension line L 4 of the end portion 110a of the body frame 110 and the extension line L 3 of the tangent line of the second curved area 211a is a coupling structure with a car door, and with other parts. It can be appropriately selected and applied depending on whether or not there is interference, and it is preferable to apply it in consideration of a structure capable of increasing the sectional secondary moment as much as possible within the allowable range.
도 8에는 본 발명의 일 실시 예에 따른 바디프레임(110)의 CAE 해석 결과가 도시되어 있고, 도 9에는 본원발명의 바디프레임을 인장강도 1180MPa의 트립강으로된 강판으로 하여 냉간 프레스 성형한 경우(T1180 1.6T)와, 인장강도 1470MPa의 강판을 핫프레스 성형한 경우(H1470 1.6T)의 150mm에 걸친 변형 구간이 도시되어 있고, 이들은 힘의 갭(G)을 가짐을 확인할 수 있다.FIG. 8 shows the results of CAE analysis of the body frame 110 according to an embodiment of the present invention, and FIG. 9 shows a case where the body frame of the present invention is cold-pressed using a steel plate made of a trip steel having a tensile strength of 1180 MPa. (T1180 1.6T), and the deformation section spanning 150mm when hot-press-molded a steel sheet having a tensile strength of 1470 MPa (H1470 1.6T) is shown, and it can be seen that they have a gap (G) of force.
이들을 참조하면, 본원발명에 따른 바디프레임(T1180 1.6T)이 150mm에 걸친 변형구간에서 인장강도 1470MPa의 강판을 핫프레스 성형한 경우(H1470 1.6T)보다 더 큰 힘을 필요로 함을 알 수 있고, 본원발명에 따르면 핫프레스 성형한 강판보다 낮은 인장강도를 가지는 강판을 냉간 프레스 성형하여 상기 핫프레스 성형한 강판보다 더 높은 강성을 확보할 수 있음을 알 수 있다.Referring to these, it can be seen that the body frame according to the present invention (T1180 1.6T) requires a greater force than the hot press-formed steel plate having a tensile strength of 1470 MPa in a deformation section spanning 150 mm (H1470 1.6T). , According to the present invention, it can be seen that a steel sheet having a lower tensile strength than a hot press-formed steel sheet can be cold pressed to secure higher rigidity than the hot-press-formed steel sheet.
도 10에는 본원발명에 따른 바디프레임(도 8의 110)으로 된 자동차 도어의 보강구조체의 최대 하중, 최대 변위, 충돌저항치의 3회 실험값 및 이들의 평균값이 도시되어 있으며, 이들은 같은 조건에서 핫프레스 성형한 강판에 비해 높은 굽힘강도를 가진다.10 shows the maximum load, the maximum displacement, the three experimental values of the collision resistance and the average values of the reinforced structures of the car door with the body frame (110 in FIG. 8) according to the present invention, and these are hot presses under the same conditions. It has a higher bending strength than the molded steel sheet.
한편, 다른 측면으로서의 본 발명은 위의 자동차 도어의 보강구조체의 성형방법을 제공한다.On the other hand, the present invention as another aspect provides a method for forming a reinforcing structure of an automobile door above.
본 발명에 따른 성형방법은 도 11에서 보이듯, 상기 바디프레임(도 6의 110)의 단면에 상기 센터부(도 6의 112)를 성형하는 제1 성형단계(S210) 및 상기 제1 성형단계 완료 이후, 상기 바디프레임(도 6의 110)의 단면에 상기 사이드부(도 6의 111) 및 상기 보강부(도 6의 120)를 동시에 성형하는 제2 성형단계(S220)를 포함할 수 있다.The molding method according to the present invention, as shown in Figure 11, the first forming step (S210) and the first forming step of forming the center portion (112 in Figure 6) on the cross section of the body frame (110 in Figure 6) Thereafter, a second forming step (S220) of simultaneously forming the side part (111 of FIG. 6) and the reinforcing part (120 of FIG. 6) on a cross section of the body frame (110 of FIG. 6 ).
이때, 상기 제1 성형단계는 도 12에서 보이듯, 인장강도가 적어도 1180 MPa인 상기 바디프레임(110)을 1회 가압하여 상기 센터부(112)를 냉간 프레스 성형할 수 있다.At this time, as shown in FIG. 12, the first forming step may cold press mold the center portion 112 by pressing the body frame 110 having a tensile strength of at least 1180 MPa once.
이러한 경우에 센터부(112)는 딥드로잉될 수 있고, 최종 목표가 되는 센터부(112)의 Z축 반대 방향으로의 깊이를 금형의 1회 이동으로 성형완료할 수 있다.In this case, the center portion 112 may be deep-drawn, and the depth in the direction opposite to the Z-axis of the center portion 112 as the final target may be completed by one movement of the mold.
다만, 인장강도가 적어도 1300 MPa인 바디프레임을 성형할 경우에는 도 13에서 보이듯, 상기 바디프레임(110)을 2회 가압하여 센터부(112)를 성형할 수 있다.However, when forming a body frame having a tensile strength of at least 1300 MPa, as shown in FIG. 13, the body frame 110 may be pressed twice to form the center portion 112.
이는 바디프레임을 형성하는 강판의 연성을 포함한 물성, 성형 조건 등에 의해 적절히 선택되어 적용될 수 있다.This may be appropriately selected and applied according to physical properties including ductility of a steel sheet forming a body frame, molding conditions, and the like.
한편, 도 14에는 인장강도 1470MPa의 강판으로 본 발명과 동일한 자동차 도어의 보강구조체 형상을 핫프레스 성형(HPF 1.6T)했을 때의 굽힘강도값, 인장강도 1180MPa의 트립강으로 된 강판을 냉간 프레스 성형하되, 보강부(도 6의 120)없이 성형(TRIP 1.6T)했을 때의 굽힘강도값, 인장강도 1180MPa의 트립강으로 된 강판을 냉간 프레스 성형하되, 보강부(도 6의 120)를 함께 성형(TRIP 1.6T)했을 때 굽힘강도값이 도시되어 있다.On the other hand, in Figure 14, a steel sheet having a tensile strength of 1470 MPa is used for hot press molding (HPF 1.6T) the shape of the reinforcing structure of the same automobile door as the present invention, and cold press molding of a steel sheet made of trip steel having a tensile strength of 1180 MPa. However, cold forming of a steel sheet made of a trip steel having a bending strength value of 1180 MPa and a tensile strength of 1180 MPa when forming (TRIP 1.6T) without a reinforcing part (120 in FIG. 6), but forming the reinforcing part (120 in FIG. 6) together When (TRIP 1.6T), the bending strength value is shown.
굽힘강도값은 각각 12.9, 11.8, 13.4의 값을 나타내는데 이에 따르면 본원발명에 따른 자동차 도어의 보강구조체는 더 높은 인장강도를 가지는 강판을 핫프레스 성형했을 때보다 더 높은 굽힘강도를 가지며, 동일한 인장강도를 가지는 강판을 보강부없이 냉간 프레스 성형했을 때보다 더 높은 강도를 가지는 것을 알 수 있다.The bending strength values indicate values of 12.9, 11.8, and 13.4, respectively. According to this, the reinforcing structure of the automobile door according to the present invention has a higher bending strength than that of hot press forming a steel sheet having a higher tensile strength, and the same tensile strength. It can be seen that the steel sheet having a has a higher strength than when cold-pressed without a reinforcement.
따라서, 본원발명에 따르면 상대적으로 낮은 인장강도를 가지는 강판으로도 상대적으로 높은 굽힘강도값을 얻을 수 있을 뿐만 아니라, 중량 증가 없이도 동급대비 상대적으로 높은 굽힘강도값을 얻을 수 있는 효과가 있다.Therefore, according to the present invention, it is possible to obtain a relatively high bending strength value even with a steel sheet having a relatively low tensile strength, as well as to obtain a relatively high bending strength value compared to the same class without increasing the weight.
이상에서 설명한 사항은 본 발명의 일 실시 예에 관하여 설명한 것이며, 본 발명의 권리범위는 이에 한정되는 것이 아니고, 청구범위에 기재된 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 다양한 수정 및 변형이 가능하다는 것은 당해 기술분야의 통상의 지식을 가진 자에게는 자명할 것이다. The above-described matters have been described in relation to one embodiment of the present invention, and the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention as set forth in the claims. It will be apparent to those skilled in the art.
10 : 자동차 도어 20 : 도어 임팩트 빔10: car door 20: door impact beam
110 : 바디프레임 111 : 사이드부110: body frame 111: side portion
112 : 센터부 113 : 장착부112: center portion 113: mounting portion
120 : 보강부120: reinforcement

Claims (10)

  1. 자동차 도어에 장착되는 바디프레임;을 포함하되,Body frame mounted on the vehicle door; includes,
    상기 바디프레임의 단면은,The cross section of the body frame,
    일 방향으로 돌출된 센터부;A center portion protruding in one direction;
    상기 센터부의 양측에서 상기 센터부와 반대방향으로 돌출된 한 쌍의 사이드부; 및A pair of side portions protruding from opposite sides of the center portion in opposite directions; And
    한 쌍의 상기 사이드부에 각각 이어지고, 단부를 상기 사이드부가 돌출된 방향으로 말아 올려 형성한 한 쌍의 보강부;A pair of reinforcing portions formed by rolling each end portion of the side portion and rolling up an end portion in the protruding direction;
    를 포함하는 자동차 도어의 보강구조체.Reinforcement structure of the vehicle door comprising a.
  2. 제1항에 있어서,According to claim 1,
    상기 센터부와 상기 사이드부의 연결지점 및 상기 사이드부와 상기 보강부의 연결지점은 라운드지게 구비되는 자동차 도어의 보강구조체.The connection point of the center portion and the side portion and the connection point of the side portion and the reinforcement portion are reinforcing structures of a vehicle door provided roundly.
  3. 제2항에 있어서,According to claim 2,
    한 쌍의 상기 사이드부는,The pair of side portions,
    상기 센터부의 일측으로 이어지는 제1 사이드부; 및A first side portion leading to one side of the center portion; And
    상기 센터부의 타측으로 이어지는 제2 사이드부;를 포함하되,Including, but; a second side portion leading to the other side of the center portion,
    상기 제1 사이드부 및 상기 제2 사이드부의 돌출 높이는 서로 다른 자동차 도어의 보강구조체.The first side portion and the second side portion of the reinforcing structure of the car door having different protruding heights.
  4. 제3항에 있어서,According to claim 3,
    상기 제1 사이드부 및 상기 제2 사이드부는,The first side portion and the second side portion,
    상기 바디프레임의 폭방향으로 일정 폭을 가지며, 라운드지게 구비된 곡선영역;을 적어도 하나씩 구비하는 자동차 도어의 보강구조체.A reinforcing structure of an automobile door having at least one curved region having a predetermined width in a width direction of the body frame and provided with a round shape.
  5. 제4항에 있어서, The method of claim 4,
    상기 보강부는,The reinforcement portion,
    상기 바디프레임의 단부를 포함하며, 상기 바디프레임의 단부의 적어도 일부가 상기 곡선영역의 접선의 연장선과 평행한 직선 상에 놓이도록 컬링(curling)된 자동차 도어의 보강구조체.A reinforcement structure of a car door including an end of the body frame, and curled such that at least a portion of the end of the body frame lies on a straight line parallel to an extension line of the tangent of the curved region.
  6. 제1항에 있어서,According to claim 1,
    상기 바디프레임은,The body frame,
    인장강도가 적어도 1180 MPa인 제1 강판 또는 인장강도가 적어도 1300 MPa인 제2 강판으로 된 자동차 도어의 보강구조체.A reinforcing structure of an automobile door made of a first steel sheet having a tensile strength of at least 1180 MPa or a second steel sheet having a tensile strength of at least 1300 MPa.
  7. 제1항 내지 제6항 중 어느 한 항의 자동차 도어의 보강구조체를 성형하는 방법으로,A method for forming a reinforcing structure of a car door according to any one of claims 1 to 6,
    상기 바디프레임의 단면에 상기 센터부를 성형하는 제1 성형단계; 및A first forming step of forming the center portion on a cross section of the body frame; And
    상기 제1 성형단계 완료 이후, 상기 바디프레임의 단면에 상기 사이드부 및 상기 보강부를 동시에 성형하는 제2 성형단계;를 포함하는 자동차 도어의 보강구조체의 성형방법.After the completion of the first forming step, a second forming step of forming the side portion and the reinforcing portion at the same time on the cross-section of the body frame; molding method of a reinforcement structure of a car door comprising a.
  8. 제7항에 있어서,The method of claim 7,
    상기 제1 성형단계는,The first forming step,
    인장강도가 적어도 1180 MPa인 상기 바디프레임을 1회 가압하여 상기 센터부를 성형하는 자동차 도어의 보강구조체의 성형방법.A method of forming a reinforcing structure of an automobile door for forming the center portion by pressing the body frame having a tensile strength of at least 1180 MPa once.
  9. 제7항에 있어서,The method of claim 7,
    상기 제1 성형단계는,The first forming step,
    인장강도가 적어도 1300 MPa인 상기 바디프레임을 2회 가압하여 상기 센터부를 성형하는 자동차 도어의 보강구조체의 성형방법.A method of forming a reinforcing structure of an automobile door by pressing the body frame having a tensile strength of at least 1300 MPa twice to form the center portion.
  10. 제7항에 있어서,The method of claim 7,
    상기 제1 성형단계 및 상기 제2 성형단계는,The first forming step and the second forming step,
    냉간 프레스 성형으로 상기 센터부, 상기 사이드부 및 상기 보강부를 성형하는 자동차 도어의 보강구조체의 성형방법.A method of forming a reinforcing structure of an automobile door for forming the center portion, the side portion and the reinforcing portion by cold press molding.
PCT/KR2019/016463 2018-11-29 2019-11-27 Reinforcement structure for door of vehicle and forming method thereof WO2020111771A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0151252 2018-11-29
KR1020180151252A KR20200064748A (en) 2018-11-29 2018-11-29 Reinforcement structure for door of vehicle and forming method thereof

Publications (1)

Publication Number Publication Date
WO2020111771A1 true WO2020111771A1 (en) 2020-06-04

Family

ID=70853431

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2019/016463 WO2020111771A1 (en) 2018-11-29 2019-11-27 Reinforcement structure for door of vehicle and forming method thereof

Country Status (2)

Country Link
KR (1) KR20200064748A (en)
WO (1) WO2020111771A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6416114B1 (en) * 1999-11-13 2002-07-09 Benteler Ag Side impact beam
JP2006240441A (en) * 2005-03-02 2006-09-14 Sumitomo Metal Ind Ltd Vehicle body reinforcing member
KR20120110103A (en) * 2009-11-25 2012-10-09 마그나 오토모티브 서비시스 게엠베하 Vehicle door reinforcing beam
KR101251385B1 (en) * 2005-05-25 2013-04-05 게스탐프 하르트테크 아베 A bumper beam
KR20170058938A (en) * 2014-09-22 2017-05-29 아르셀러미탈 Reinforcement element for a vehicle, method for producing the same and door assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960033829U (en) 1995-04-04 1996-11-19 Heavy Duty Pneumatic Radial Tires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6416114B1 (en) * 1999-11-13 2002-07-09 Benteler Ag Side impact beam
JP2006240441A (en) * 2005-03-02 2006-09-14 Sumitomo Metal Ind Ltd Vehicle body reinforcing member
KR101251385B1 (en) * 2005-05-25 2013-04-05 게스탐프 하르트테크 아베 A bumper beam
KR20120110103A (en) * 2009-11-25 2012-10-09 마그나 오토모티브 서비시스 게엠베하 Vehicle door reinforcing beam
KR20170058938A (en) * 2014-09-22 2017-05-29 아르셀러미탈 Reinforcement element for a vehicle, method for producing the same and door assembly

Also Published As

Publication number Publication date
KR20200064748A (en) 2020-06-08

Similar Documents

Publication Publication Date Title
WO2012033370A2 (en) Crash box for a vehicle
WO2010062007A1 (en) Shock absorbing device for vehicle with multiple shock absorbing stages
WO2012115358A2 (en) Load limiter
WO2014003418A1 (en) Front body for vehicle
US5887938A (en) Side impact beam for a passenger vehicle
WO2012157986A2 (en) Bumper back beam for vehicle
WO2020111771A1 (en) Reinforcement structure for door of vehicle and forming method thereof
WO2020015507A1 (en) Forward collision transmission structure and electric vehicle
US11718252B2 (en) Bumper arrangement
CA2486755C (en) Connecting bogies
WO2014010844A1 (en) Bumper back beam made of composite material and having improved energy absorption rate, and bumper including same
WO2020040429A1 (en) Shock absorbent safety bar having reinforcement creases, for vehicle door
WO2014021554A1 (en) Welding beam including uneven web in intermediate portion thereof, and method for manufacturing same
WO2017047894A1 (en) Buckling inducing-type vehicle crash boxes and vehicle back beam having same
WO2012118324A2 (en) Seat mounted side airbag apparatus
WO2020111846A1 (en) Bumper beam system for vehicle
WO2024136345A1 (en) Frame for electric vehicle
WO2022092626A1 (en) Vehicle bumper beam
WO2017119636A1 (en) Passenger side airbag housing, manufacturing method therefor, and passenger side airbag for vehicle
WO2013118973A1 (en) Auxiliary handle fixing apparatus for modular vehicle headliners
WO2012074155A1 (en) Breakaway system for vehicle
WO2023113455A1 (en) Impact reinforcement component and method for manufacturing same
WO2021060660A1 (en) Side sill for vehicle
WO2023121042A1 (en) Method for manufacturing molded parts
WO2024136330A1 (en) Frame for electric vehicle

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19891261

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19891261

Country of ref document: EP

Kind code of ref document: A1