KR101072373B1 - Body for railway vehicles - Google Patents

Body for railway vehicles Download PDF

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Publication number
KR101072373B1
KR101072373B1 KR1020090031962A KR20090031962A KR101072373B1 KR 101072373 B1 KR101072373 B1 KR 101072373B1 KR 1020090031962 A KR1020090031962 A KR 1020090031962A KR 20090031962 A KR20090031962 A KR 20090031962A KR 101072373 B1 KR101072373 B1 KR 101072373B1
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KR
South Korea
Prior art keywords
reinforcing member
friction welding
vehicle body
underframe
joined
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KR1020090031962A
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Korean (ko)
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KR20100113400A (en
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문형석
서승일
구병춘
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한국철도기술연구원
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Priority to KR1020090031962A priority Critical patent/KR101072373B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/043—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures connections between superstructure sub-units
    • B61D17/045—The sub-units being construction modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/041—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures with bodies characterised by use of light metal, e.g. aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

본 발명은 철도차량용 차체에 관한 것으로, 보다 상세하게는 언더프레임과 사이드프레임 및 천정프레임을 포함하여 구성되는 철도차량용 차체의 연결부를 마찰용접에 의해 접합시킴으로써 차체 연결부에 기공이나 고온균열과 같은 용접 결함이 발생하지 않고, 변형이 발생하지 않으며 차체의 충격강도와 피로강도를 증가시킬 수 있는 철도차량용 차체에 관한 것이다.The present invention relates to a vehicle body for railway vehicles, and more particularly, welding defects such as pores or high temperature cracks in the vehicle body connection portions by joining the connection portions of the railway vehicle bodies, including the underframe, side frames and ceiling frames, by friction welding. It does not occur, deformation does not occur and relates to a railway vehicle body that can increase the impact strength and fatigue strength of the body.

본 발명은 언더프레임, 사이드프레임 및 천정프레임을 포함하여 구성되는 철도차량용 차체에 있어서, 상기 언더프레임, 사이드프레임 및 천정프레임은 알루미늄 재질의 압출부재들로 이루어지고 상기 압출부재들은 마찰용접에 의해 접합되는 것을 특징으로 한다.The present invention provides a railway vehicle body including an underframe, a side frame and a ceiling frame, wherein the underframe, the sideframe and the ceiling frame are made of aluminum extrusion members and the extrusion members are joined by friction welding. It is characterized by.

철도차량, 차체, 마찰용접, 보강부재 Railway vehicles, body, friction welding, reinforcement

Description

철도차량용 차체{Body for railway vehicles}Body for railway vehicles

본 발명은 철도차량용 차체에 관한 것으로, 보다 상세하게는 언더프레임과 사이드프레임 및 천정프레임을 포함하여 구성되는 철도차량용 차체의 연결부를 마찰용접에 의해 접합시킴으로써 차체 연결부에 기공이나 고온균열과 같은 용접 결함이 발생하지 않고, 변형이 발생하지 않으며 차체의 충격강도와 피로강도를 증가시킬 수 있는 철도차량용 차체에 관한 것이다.The present invention relates to a vehicle body for railway vehicles, and more particularly, welding defects such as pores or high temperature cracks in the vehicle body connection portions by joining the connection portions of the railway vehicle bodies, including the underframe, side frames and ceiling frames, by friction welding. It does not occur, deformation does not occur and relates to a railway vehicle body that can increase the impact strength and fatigue strength of the body.

일반적으로, 철도차량용 차체는 도 1에 나타낸 바와 같이, 철도차량의 바닥을 구성하는 언더프레임(10)과, 상기 언더프레임(10)의 양측 단부에 수직방향으로 구비되어 벽체를 형성하는 사이드프레임(20)과, 상기 사이드프레임(20)의 상단에 수평방향으로 구비되는 천정프레임(30)을 포함하여 구성되고, 그 내,외측면에는 내장재 또는 외장재로 마감처리를 하게 된다.In general, as shown in FIG. 1, a vehicle body for a railway vehicle includes an underframe 10 constituting the bottom of the railway vehicle, and a side frame provided at both ends of the underframe 10 in a vertical direction to form a wall ( 20) and the ceiling frame 30 is provided in the horizontal direction on the top of the side frame 20, the inner and outer surfaces are finished with interior or exterior materials.

이와 같은 철도차량용 차체는 대부분 스테인레스나 알루미늄 압출재를 이용하여 언더프레임(10)과 사이드프레임(20) 및 천정프레임(30)을 부분적으로 제작하 고 이들을 용접에 의해 결합하여 차체를 완성하게 되는데, 이러한 용접에는 주로 MIG(Metal Inert Gas)나 TIG(Tungsten Inert Gas)와 같은 불활성가스 용접이 이용되어 왔다.Such a railway vehicle body is mostly made of the underframe 10, the side frame 20 and the ceiling frame 30 by using a stainless or aluminum extruded material and combine them by welding to complete the body. Inert gas welding such as metal inert gas (MIG) or tungsten inert gas (TIG) has been mainly used for welding.

하지만, 상기와 같은 MIG나 TIG 용접 시에는 고온 용융 상태와 상온에서의 수소 용해도 차이에 의해 용접 후 냉각 상태에서 용해되지 못한 수소 가스가 기공을 형성하게 되고, 고온에서 입계에 존재하는 액막이 결정립의 냉각에 따른 수축력을 견디지 못하여 고온균열도 발생하는 등의 결함이 발생하는 문제점이 있다.However, in the MIG or TIG welding as described above, hydrogen gas that is not dissolved in the cold state after welding due to the difference between the solubility of hydrogen in the hot melt state and the normal temperature forms pores, and the liquid film existing at the grain boundary at the high temperature cools the crystal grains. There is a problem that a defect occurs such as not able to withstand the shrinkage force caused by high temperature cracks.

또한, 용융 용접 중 투입되는 열에 의한 온도 구배에 따라 스테인레스나 알루미늄 압출재에 과도한 변형이 발생하는 문제점도 있었다.In addition, there is also a problem that excessive deformation occurs in the stainless or aluminum extruded material according to the temperature gradient due to the heat input during the melt welding.

상기와 같은 문제점들을 해결하기 위하여 안출된 본 발명의 목적은 마찰용접에 의해 압출부재들을 결합함으로써 용접부위에 기공 및 균열과 같은 결함이 발생하지 않고, 용접에 따른 변형이 발생하지 않으며 압출부재들의 조직이 미세화되므로 충격강도와 피로강도가 증가된 철도차량용 차체를 제공함에 있다.The object of the present invention devised to solve the above problems is that the defects such as pores and cracks do not occur in the welded portion by joining the extruded members by friction welding, and the deformation of the extruded members does not occur. As it is miniaturized, the present invention provides a railway vehicle body with increased impact strength and fatigue strength.

또한, 본 발명은 차체를 구성하는 압출부재들 사이에 보강부재를 삽입하여 마찰용접부의 면적을 증대시킴으로써 작업성이 뛰어날 뿐만 아니라 차체의 강도를 증가시킬 수 있으므로 내구성을 향상시킬 수 있는 철도차량용 차체를 제공함에 다른 목적이 있다.In addition, the present invention is not only excellent workability by increasing the area of the friction welding portion by inserting a reinforcing member between the extruded members constituting the vehicle body, but also can increase the strength of the vehicle body to improve the durability of the railway vehicle body There is another purpose in providing.

상기한 목적들을 달성하기 위한 본 발명은,The present invention for achieving the above objects,

언더프레임, 사이드프레임 및 천정프레임을 포함하여 구성되는 철도차량용 차체에 있어서, 상기 언더프레임, 사이드프레임 및 천정프레임은 알루미늄 재질의 압출부재들로 이루어지고 상기 압출부재들은 마찰용접에 의해 접합되는 것을 특징으로 한다.In a vehicle body for a railway vehicle comprising an underframe, a side frame and a ceiling frame, the underframe, the side frame and the ceiling frame are made of aluminum extruded members and the extruded members are joined by friction welding. It is done.

이때, 상기 언더프레임과 사이드프레임의 사이 및 사이드플레임과 천정프레임의 사이에는 각각 연결부재가 마찰용접에 의해 접합되는 것을 특징으로 한다.At this time, the connection member is bonded between the underframe and the side frame and between the side frame and the ceiling frame, respectively, by friction welding.

또한, 상기 압출부재들 사이 또는 압출부재와 연결부재 사이의 결합부에는 보강부재가 삽입 설치되어 마찰용접에 의해 접합되는 것을 특징으로 한다.In addition, the reinforcing member is inserted into the coupling portion between the extruded members or between the extruded member and the connecting member is characterized in that the joining by friction welding.

여기서, 상기 보강부재는 압출부재 또는 연결부재의 상부 플레이트의 상단면 사이에 결합되는 제1보강부재와, 양 단부가 상부 플레이트의 하단면 사이에 결합되는 U자형의 제2보강부재를 포함하여 구성된 것을 특징으로 한다.Here, the reinforcing member is configured to include a first reinforcing member coupled between the upper surface of the upper plate of the extrusion member or the connecting member, and the second reinforcing member of the U-shaped both ends are coupled between the lower surface of the upper plate It is characterized by.

이때, 상기 제1보강부재는 위로 볼록한 형상으로 만곡되어 형성되고, 제1보강부재의 양단부에는 상기 상부 플레이트의 상단면에 형성되는 제1단턱부에 마찰용접에 의해 접합되는 절곡부가 형성된 것을 특징으로 한다.In this case, the first reinforcing member is formed to be bent upwardly convex shape, characterized in that both ends of the first reinforcing member is formed with a bent portion joined by friction welding on the first step portion formed on the upper surface of the upper plate. do.

그리고, 상기 제2보강부재의 양측 상단부에는 제2단턱부가 형성되되, 제2단턱부의 제1수평면은 제1보강부재의 하단면에 마찰용접에 의해 접합되고, 제2단턱부의 제2수평면은 상기 상부 플레이트의 하단면에 마찰용접에 의해 접합되는 것을 특징으로 한다.A second stepped portion is formed at both upper end portions of the second reinforcing member, and the first horizontal surface of the second stepped portion is joined to the bottom surface of the first reinforcing member by friction welding, and the second horizontal surface of the second stepped portion is It is characterized in that the lower surface of the upper plate is bonded by friction welding.

또한, 상기 제2보강부재의 중앙 하단부에는 결합홈이 형성되고, 압출부재 또는 연결부재의 하부 플레이트 단부에는 결합돌기가 형성되어 상기 결합돌기가 결합홈에 삽입 결합되어 마찰용접에 의해 접합되는 것을 특징으로 한다.In addition, a coupling groove is formed at the center lower end of the second reinforcing member, and a coupling protrusion is formed at the lower plate end of the extrusion member or the connection member, and the coupling protrusion is inserted and coupled to the coupling groove and joined by friction welding. It is done.

또한, 상기 보강부재는 압출부재 및 연결부재의 하부 플레이트 사이의 연결부에 결합되는 제3보강부재를 더 포함하는 것을 특징으로 한다.In addition, the reinforcing member is characterized in that it further comprises a third reinforcing member coupled to the connecting portion between the lower plate of the extrusion member and the connecting member.

그리고, 상기 제2보강부재의 중앙 하단부에는 결합홈이 형성되고, 상기 결합홈에는 제3보강부재가 마찰용접에 의해 접합되는 것을 특징으로 한다.In addition, a coupling groove is formed at the center lower end of the second reinforcing member, and the third reinforcing member is joined to the coupling groove by friction welding.

본 발명에 따른 철도차량용 차체에 의하면, 차체를 구성하는 압출부재들을 마찰용접에 의해 결합함으로써 용접부위에 기공 및 균열과 같은 결함이 발생하지 않고, 용접에 따른 변형이 발생하지 않으며, 고속접합이 가능하여 접합에 필요한 에너지가 적고 별도의 열원 발생장치 등이 필요치 않으므로 원가 절감이 가능한 효과를 갖는다.According to the railway vehicle body according to the present invention, by combining the extrusion members constituting the vehicle body by friction welding, defects such as pores and cracks do not occur in the welded portion, deformation due to welding does not occur, and high-speed welding is possible Since the energy required for joining is small and a separate heat source generator is not needed, cost reduction can be achieved.

또한, 본 발명에 따르면 차체를 구성하는 압출부재들 사이에 보강부재를 삽입하여 마찰용접부의 면적을 증대시킴으로써 충격강도와 피로강도를 보다 향상시킬 수 있으므로 내구성이 뛰어나고, 용접과정 중 유해가스나 유해 광선이 발생하지 않으므로 환경 친화적인 작업환경에서 작업할 수 있는 효과를 추가로 갖는다.In addition, according to the present invention, by inserting a reinforcing member between the extruded members constituting the vehicle body to increase the area of the friction welding portion, the impact strength and fatigue strength can be further improved, so it is excellent in durability, harmful gas or harmful rays during the welding process. Since this does not occur, it has an additional effect of working in an environment-friendly working environment.

이하, 첨부된 도면을 참고로 하여 본 발명에 따른 철도차량용 차체의 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the vehicle body for a railway vehicle according to the present invention.

도 2는 본 발명에 따른 철도차량용 차체의 제조에 사용되는 마찰용접방법을 나타낸 개념도이고, 도 3은 본 발명에 따른 철도차량용 차체의 연결 구조를 나타낸 부분 확대 분리 사시도이며, 도 4는 도 3에 나타낸 본 발명의 다른 실시예를 나타낸 부분 확대 분리 사시도이고, 도 5의 (a) ~ (c)는 본 발명에 따른 철도차량용 차체에 적용되는 보강부재를 나타낸 정면도이며, 도 6는 본 발명에 따른 철도차량용 차체 중 보강부재를 나타낸 부분 확대 단면도이고, 도 7은 도 6에 나타낸 본 발명의 다른 실시예를 나타낸 부분 확대 단면도이다.Figure 2 is a conceptual diagram showing a friction welding method used in the manufacture of the railway vehicle body according to the present invention, Figure 3 is a partially enlarged separated perspective view showing a connection structure of the railway vehicle body according to the present invention, Figure 4 is 5 is a partially enlarged separated perspective view illustrating another embodiment of the present invention, and FIGS. 5A to 5C are front views illustrating reinforcement members applied to a vehicle body for a railway vehicle according to the present invention, and FIG. Partial enlarged cross-sectional view showing a reinforcing member of the vehicle body for a railway vehicle, Figure 7 is a partially enlarged cross-sectional view showing another embodiment of the present invention shown in FIG.

본 발명은 언더프레임(10)과 사이드프레임(20) 및 천정프레임(30)을 포함하여 구성되는 철도차량용 차체(100)의 연결부를 마찰용접에 의해 접합시킴으로써 차체(100) 연결부에 기공이나 고온균열과 같은 용접 결함이 발생하지 않고, 변형이 발생하지 않으며 차체(100)의 충격강도와 피로강도를 증가시킬 수 있는 철도차량용 차체(100)에 관한 것으로, 그 구성은 크게 언더프레임(10), 사이드프레임(20) 및 천정프레임(30)과, 언더프레임(10)과 사이드프레임(20)의 사이 및 사이드프레임(20)과 천정프레임(30)의 사이에 설치되는 연결부재(40)를 포함하여 구성된다.The present invention is a pore or high temperature crack in the connection to the vehicle body 100 by joining the connection of the vehicle body 100 for railroad vehicles including the underframe 10 and the side frame 20 and the ceiling frame 30 by friction welding It does not occur welding defects, such as deformation does not occur and relates to a railway vehicle body 100 that can increase the impact strength and fatigue strength of the vehicle body 100, the configuration is largely the underframe 10, side Including the frame 20 and the ceiling frame 30, the connecting member 40 is installed between the underframe 10 and the side frame 20 and between the side frame 20 and the ceiling frame 30 It is composed.

보다 상세히 설명하면, 본 발명에 따른 철도차량용 차체(100)는 도 1에 나타낸 바와 같이, 철도차량의 바닥면을 구성하는 언더프레임(10)과, 상기 언더프레임(10)의 양측 단부에 수직방향으로 구비되어 벽체를 형성하는 사이드프레임(20)과, 상기 사이드프레임(20)의 상단에 수평방향으로 구비되는 천정프레임(30)을 포함하여 구성되는데, 상기 언더프레임(10), 사이드프레임(20) 및 천정프레임(30)은 다수의 알루미늄 재질의 압출부재(50)들을 마찰용접(FSW: Friction Stir Welding)에 의해 접합함으로써 차체의 형상을 이루게 된다.In more detail, the railway vehicle body 100 according to the present invention, as shown in Figure 1, the underframe 10 constituting the bottom surface of the railway vehicle, and perpendicular to both ends of the underframe 10 It is configured to include a side frame 20 and a ceiling frame 30 provided in the horizontal direction on the top of the side frame 20, which is provided as a wall, the underframe 10, the side frame 20 ) And the ceiling frame 30 forms a shape of the vehicle body by joining a plurality of aluminum extruded members 50 by friction welding (FSW: Friction Stir Welding).

이때, 상기 마찰용접은 도 2에 나타낸 바와 같이, 비소모식 회전툴(5)이 접합 모재에 삽입되어 고속으로 회전하면서 마찰열을 발생시켜 모재의 변형 저항을 낮추어 연화시키기에 충분한 온도로 가열한 후, 기계적인 힘에 의해 회전툴(5)이 이동하면서 가열 부분을 앞부분에서 뒤쪽으로 압출되게 하여 마찰열과 기계적 가공의 조합으로 고상접합부가 만들어지게 하는 접합 방법으로, 이와 같은 마찰용접에 의해 압출부재(50)들을 접합하면 종래의 TIG(Tunsten Inert Gas)나 MIG(Metal Inert Gas) 용접과 달리 별도의 열원발생장치, 용접봉, 용가제, 분위기 가스 등을 사용할 필요가 없고, 접합부위의 전처리도 필요 없으며 접합과정에서 유해광선이나 유해물질이 배출되지 않으므로 경제적이면서도 친환경적인 작업환경하에서 차체를 제조할 수 있게 된다. 또한, 상기와 같은 마찰용접에 의한 접합은 고상 상태에서 접합하기 때문에 접합에 따른 압출부재(50)들의 변형이 매우 적고, 용융 용접에서 발생하기 쉬운 기공이나 균열 등의 결함이 거의 발생하지 않으며, 압출부재(50)들의 조직이 미세화되므로 충격강도와 피로강도가 증가하여 내구성이 향상된 철도차량용 차체(100)를 제조할 수 있는 등의 다양한 장점이 있다.At this time, the friction welding is heated to a temperature sufficient to soften by lowering the deformation resistance of the base material by generating a friction heat while the non-consumable rotary tool 5 is inserted into the bonding base material to rotate at high speed, as shown in FIG. As the rotary tool 5 is moved by mechanical force, the heating part is extruded from the front part to the rear part, and a solid state joint is made by the combination of frictional heat and mechanical processing. The extrusion member 50 is produced by such friction welding. ), Unlike conventional TIG (Tunsten Inert Gas) or MIG (Metal Inert Gas) welding, there is no need to use separate heat source generator, welding rod, solvent, atmosphere gas, etc. Since no harmful light or harmful substances are emitted during the process, the vehicle body can be manufactured under an economical and environmentally friendly working environment. In addition, since the welding by friction welding is bonded in a solid state, the deformation of the extrusion members 50 due to the bonding is very small, and defects such as pores or cracks, which are likely to occur in melt welding, hardly occur, and extrusion is performed. Since the structure of the members 50 is miniaturized, the impact strength and the fatigue strength are increased, so that the vehicle body 100 can be manufactured to have improved durability.

한편, 상기 언더프레임(10)과 사이드프레임(20)의 사이 및 사이드프레임(20)과 천정프레임(30)의 사이에 설치되는 연결부재(40)는 언더프레임(10)과 사이드프레임(20)의 사이에 연결 설치되는 솔바(sole bar)(42)와 사이드프레임(20)과 천정프레임(30)의 사이에 연결 설치되는 캔트레일(cant rail)(44)로 구성되는데, 상기 솔바(42)와 캔트레일(44)은 차체(100)의 전체적인 형상을 고려하여 그 단면이 곡면을 이루도록 압출 형성되고, 마찰용접에 의해 언더프레임(10)과 사이드프레임(20) 및 천정프레임(30)에 접합된다. 여기서 상기 압출부재(50)와 연결부재(40)는 상부 플레이트(52)와 하부 플레이트(54)로 구성되는 외벽과, 상기 외벽의 내측에 형성되는 리브(rib)(56)들로 구성된다.Meanwhile, the connection member 40 installed between the underframe 10 and the side frame 20 and between the side frame 20 and the ceiling frame 30 has an underframe 10 and a side frame 20. Is composed of a sole bar (42) that is connected between the installation (sole bar 42) and the side frame 20 and the cant rail (44) (44) is installed between the ceiling frame 30, the sole bar (42) The can trail 44 is extruded to form a curved surface in consideration of the overall shape of the vehicle body 100, and bonded to the underframe 10, the side frame 20 and the ceiling frame 30 by friction welding. do. Here, the extrusion member 50 and the connection member 40 are composed of an outer wall composed of the upper plate 52 and the lower plate 54, and ribs 56 formed inside the outer wall.

다음, 상기 언더프레임(10)과 사이드프레임(20) 및 천정프레임(30)을 구성하는 압출부재(50)들의 사이 및 압출부재(50)와 연결부재(40) 사이의 결합부에는 도 3에 나타낸 바와 같이, 보강부재(200)가 삽입 설치되는 것이 바람직한데, 그 이유는 상기 보강부재(200)에 의해 마찰용접부의 면적이 증대되어 차체(100)의 강도를 전체적으로 향상시킬 수 있을 뿐만 아니라 결함 및 변형이 발생하지 않는 차체(100)를 제조할 수 있기 때문이다.Next, the coupling part between the extruded members 50 constituting the underframe 10 and the side frame 20 and the ceiling frame 30 and between the extruded member 50 and the connecting member 40 is shown in FIG. 3. As shown, it is preferable that the reinforcement member 200 is inserted and installed, because the area of the friction welding portion is increased by the reinforcement member 200, thereby improving the overall strength of the vehicle body 100 as well as defects. This is because the vehicle body 100 in which deformation does not occur can be manufactured.

이때, 상기 보강부재(200)는 압출부재(50) 또는 연결부재(40)의 상부 플레이트(52)의 상단면 사이에 연결 설치되는 제1보강부재(210)와, 양 단부가 상기 상부 플레이트(52)의 하단면에 결합되고, 중간부분은 압출부재(50) 또는 연결부재(40)의 하부 플레이트(54) 상면에 접합되는 U자 형상의 제2보강부재(220)를 포함하여 구성되는데, 상기 상부 플레이트(52)의 단부 상면에는 제1단턱부(52a)가 형성되어 상기 제1보강부재(210)와의 마찰접합이 이루어지는 접합면적을 증대시킬 수 있도록 하는 것이 바람직하다. 보다 상세히 설명하면, 상기 제1보강부재(210)는 측면으로부터의 압력을 잘 견딜수 있도록 하기 위해 위로 볼록한 형상으로 만곡되어 형성되고, 제1보강부재(210)의 양 단부에는 절곡부(212)가 형성되어 상기 제1단턱부(52a)와 접합되도록 함으로써 마찰용접이 이루어지는 면적을 증대시킬 수 있는 것이다.At this time, the reinforcing member 200 is the first reinforcing member 210 is installed between the upper surface of the upper plate 52 of the extrusion member 50 or the connecting member 40 and both ends of the upper plate ( 52 is coupled to the bottom surface, the middle portion comprises a U-shaped second reinforcing member 220 bonded to the upper surface of the lower plate 54 of the extrusion member 50 or the connection member 40, A first stepped portion 52a may be formed on the upper end of the upper plate 52 so as to increase a bonding area where friction bonding with the first reinforcing member 210 is performed. In more detail, the first reinforcing member 210 is formed to be bent upwardly convex in order to withstand the pressure from the side, the bent portion 212 is formed at both ends of the first reinforcing member 210 It is formed to be bonded to the first stepped portion 52a it is possible to increase the area where the friction welding is made.

또한, 상기 U자 형상의 제2보강부재(220)는 압출부재(50) 및 연결부재(40)를 구성하는 상부 플레이트(52)와 하부 플레이트(54)의 사이에 연결 설치되어 차체(100)가 외부의 충격으로부터 잘 견딜 수 있도록 함과 동시에 압출부재(50)들 사이 또는 압출부재(50)와 연결부재(40) 사이의 결합부에 마찰용접에 의한 접합면적을 증대시킴으로써 차체(100)의 내구성을 향상시킬 수 있도록 하는 역할을 한다.In addition, the U-shaped second reinforcing member 220 is connected between the upper plate 52 and the lower plate 54 constituting the extrusion member 50 and the connecting member 40 is installed in the vehicle body 100 Of the vehicle body 100 by increasing the joint area by friction welding between the extruded members 50 or between the extruded members 50 and the connecting member 40 while being able to withstand the external impact well. It plays a role to improve durability.

이때, 상기 제2보강부재(220)의 양측 단부에는 제2단턱부(222)를 형성하여, 그 단부에 제1수평면(222a)과 제2수평면(222b)이 형성되도록 하는 것이 바람직한데, 그 이유는 상기 제1수평면(222a)은 제1보강부재(210)의 하단면, 즉 제1보강부재(210)의 절곡부(212) 하부면에 맞닿게 되어 마찰용접에 의해 접합되고, 제2수평면(222b)은 상부 플레이트(52)의 하단면에 맞닿게 되어 마찰용접에 의해 접합되도록 하여 마찰용접에 의한 접합면적을 향상시킬 수 있기 때문이다.In this case, it is preferable to form second stepped portions 222 at both end portions of the second reinforcing member 220 so that the first horizontal plane 222a and the second horizontal plane 222b are formed at the ends thereof. The reason is that the first horizontal surface 222a comes into contact with the lower surface of the first reinforcing member 210, that is, the lower surface of the bent portion 212 of the first reinforcing member 210, and is joined by friction welding. This is because the horizontal surface 222b abuts against the bottom surface of the upper plate 52 so that the horizontal surface 222b may be joined by friction welding, thereby improving the bonding area by friction welding.

또한, 상기 제2보강부재(220)의 중앙 하단부에는 결합홈(224)이 형성되고, 압출부재(50) 및 연결부재(40)를 구성하는 하부 플레이트(54)의 단부에는 결합돌기(54a)가 상향으로 돌출 형성되어 상기 결합돌기(54a)가 결합홈(224)에 삽입되도록 함으로써 제2보강부재(220)와 하부 플레이트(54) 사이의 마찰용접에 의한 접합면적을 향상시킬 수 있도록 하는 것이 바람직하다.In addition, the coupling groove 224 is formed at the center lower end of the second reinforcing member 220, the coupling protrusion (54a) at the end of the lower plate 54 constituting the extrusion member 50 and the connection member 40 Is formed to protrude upward to allow the coupling protrusion 54a to be inserted into the coupling groove 224 so as to improve the bonding area by friction welding between the second reinforcing member 220 and the lower plate 54. desirable.

한편, 본 발명에 따른 철도차량용 차체(100)의 다른 실시예에 의하면, 도 4에 나타낸 바와 같이 상기 보강부재(200)로 압출부재(50) 및 연결부재(40)의 하부 플레이트(54) 사이의 연결부에 결합되는 제3보강부재(230)를 부가 설치할 수도 있는데, 상기 제3보강부재(230)는 전술한 일실시예에서 설명한 하부 플레이트(54)의 단부에 형성되는 결합돌기(54a)의 역할을 하는 것이다.On the other hand, according to another embodiment of the railway vehicle body 100 according to the present invention, as shown in Figure 4 between the lower plate 54 of the extrusion member 50 and the connecting member 40 to the reinforcing member 200. The third reinforcing member 230 may be additionally installed to be coupled to the connection portion of the third reinforcing member 230 of the coupling protrusion 54a formed at the end of the lower plate 54 described in the above-described embodiment. It is to play a role.

즉, 도 4 및 도 7에 나타낸 바와 같이, 압출부재(50) 및 연결부재(40)의 하부 플레이트(54) 사이의 연결부에 단면이 직사각형 형상을 이루는 제3보강부재(230)를 삽입 설치함으로써 하부 플레이트(54)의 단부에 별도의 결합돌기(54a)를 형성시킬 필요가 없게 되므로 압출부재(50) 및 연결부재(40)의 가공이 용이할 뿐만 아니라, 하부 플레이트(54)와 제3보강부재를 마찰용접에 의해 접합함으로써 마찰용 접에 의한 접합면적을 증대시켜 차체(100)의 내구성을 향상시킬 수 있도록 한 것이다. That is, as shown in Figures 4 and 7, by inserting the third reinforcing member 230 having a rectangular cross section in the connecting portion between the extrusion member 50 and the lower plate 54 of the connecting member 40 Since there is no need to form a separate coupling protrusion 54a at the end of the lower plate 54, not only the extrusion member 50 and the connecting member 40 can be easily processed, but also the lower plate 54 and the third reinforcement. By joining the members by friction welding, the joining area by friction welding can be increased to improve the durability of the vehicle body 100.

이때, 상기 제3보강부재(230)의 상부는 제2보강부재(220)의 중앙 하단에 형성된 결합홈(224)에 삽입되도록 함으로써 제2보강부재(220)와 제3보강부재(230) 사이의 마찰용접에 의한 접합면적을 향상시킬 수 있도록 하는 것이 바람직하다.At this time, the upper portion of the third reinforcing member 230 is inserted into the coupling groove 224 formed in the lower center of the second reinforcing member 220 between the second reinforcing member 220 and the third reinforcing member 230. It is desirable to be able to improve the joint area by friction welding.

따라서, 상기와 같이 구성된 본 발명에 따른 철도차량용 차체(100)에 의하면 언더프레임(10), 사이드프레임(20) 및 천정프레임(30)을 구성하는 알루미늄 재질로 이루어지는 압출부재(50)들과 솔바(42)와 캔트레일(44)로 구성되는 연결부재(40)들을 마찰용접에 의해 접합시킴으로써 용접부위에 기공 및 균열과 같은 결함이 발생하지 않고, 용접에 따른 변형이 발생하지 않는 등의 마찰용접이 갖는 다양한 장점들을 철도차량용 차체(100)에 적용할 수 있을 뿐만 아니라, 제1 내지 제3보강부재(210,220,230)로 이루어지는 보강부재(200)를 이용하여 마찰용접에 의한 접합면적을 최대화함으로써 충격강도와 피로강도를 보다 향상시킬 수 있으므로 차체(100)의 내구성을 대폭 향상시킬 수 있는 등의 다양한 장점을 갖는 것이다.Therefore, according to the railway vehicle body 100 according to the present invention configured as described above, the extrusion member 50 and the sole bar made of aluminum material constituting the underframe 10, the side frame 20 and the ceiling frame 30 By joining the connecting members 40 composed of the 42 and the can trail 44 by friction welding, friction welding such as defects such as pores and cracks do not occur in the welded portion and deformation due to welding does not occur. Not only can various advantages be applied to the vehicle body 100 for a railway vehicle, but also the impact strength and strength by maximizing the joint area by friction welding using the reinforcing member 200 made of the first to third reinforcing members 210, 220, and 230. Since fatigue strength can be further improved, the durability of the vehicle body 100 can be greatly improved.

전술한 실시예들은 본 발명의 가장 바람직한 예에 대하여 설명한 것이지만, 상기 실시예에만 한정되는 것은 아니며, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 다양한 변형이 가능하다는 것은 당업자에게 있어서 명백한 것이다.Although the above embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

본 발명은 철도차량용 차체에 관한 것으로, 보다 상세하게는 언더프레임과 사이드프레임 및 천정프레임을 포함하여 구성되는 철도차량용 차체의 연결부를 마찰용접에 의해 접합시킴으로써 차체 연결부에 기공이나 고온균열과 같은 용접 결함이 발생하지 않고, 변형이 발생하지 않으며 차체의 충격강도와 피로강도를 증가시킬 수 있는 철도차량용 차체에 관한 것이다.The present invention relates to a vehicle body for railway vehicles, and more particularly, welding defects such as pores or high temperature cracks in the vehicle body connection portions by joining the connection portions of the railway vehicle bodies, including the underframe, side frames and ceiling frames, by friction welding. It does not occur, deformation does not occur and relates to a railway vehicle body that can increase the impact strength and fatigue strength of the body.

도 1은 일반적인 철도차량용 차체의 구조를 나타낸 정단면도.1 is a front sectional view showing the structure of a general railway vehicle body.

도 2는 본 발명에 따른 철도차량용 차체의 제조에 사용되는 마찰용접방법을 나타낸 개념도.Figure 2 is a conceptual diagram showing a friction welding method used in the manufacture of the vehicle body for railway vehicles according to the present invention.

도 3은 본 발명에 따른 철도차량용 차체의 연결 구조를 나타낸 부분 확대 분리 사시도.Figure 3 is a partially enlarged perspective view showing a connection structure of the vehicle body for a railway vehicle according to the present invention.

도 4는 도 3에 나타낸 본 발명의 다른 실시예를 나타낸 부분 확대 분리 사시도.Figure 4 is a partially enlarged perspective view showing another embodiment of the present invention shown in FIG.

도 5의 (a) ~ (c)는 본 발명에 따른 철도차량용 차체에 적용되는 보강부재를 나타낸 정면도.Figure 5 (a) ~ (c) is a front view showing a reinforcing member applied to the vehicle body for a railway vehicle according to the present invention.

도 6는 본 발명에 따른 철도차량용 차체 중 보강부재를 나타낸 부분 확대 단면도.Figure 6 is a partially enlarged cross-sectional view showing a reinforcing member of the vehicle body for a railway vehicle according to the present invention.

도 7은 도 6에 나타낸 본 발명의 다른 실시예를 나타낸 부분 확대 단면도.7 is a partially enlarged cross-sectional view showing another embodiment of the present invention shown in FIG.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

5 : 회전툴 10 : 언더프레임5: Rotation Tool 10: Underframe

20 : 사이드프레임 30 : 천정프레임20: side frame 30: ceiling frame

40 : 연결부재 42 : 솔바40: connecting member 42: sole

44 : 캔트레일 50 : 압출부재44: can trail 50: extrusion member

52 : 상부 플레이트 52a : 제1단턱부52: upper plate 52a: first stepped portion

54 : 하부 플레이트 56 : 리브54: lower plate 56: rib

100 : 차체 200 : 보강부재100: body 200: reinforcing member

210 : 제1보강부재 212 : 절곡부210: first reinforcing member 212: bent portion

220 : 제2보강부재 220a : 제1부재220: second reinforcing member 220a: first member

220b : 제2부재 222 : 결합돌기220b: second member 222: engaging projection

230 : 제3보강부재 232 : 제2단턱부230: third reinforcing member 232: second stepped portion

232a : 제1수평면 232b : 제2수평면232a: first horizontal plane 232b: second horizontal plane

234 : 결합홈234: coupling groove

Claims (9)

언더프레임, 사이드프레임 및 천정프레임을 포함하여 구성되는 철도차량용 차체에 있어서,In the vehicle body for railway vehicles comprising an underframe, side frames and ceiling frames, 상기 언더프레임, 사이드프레임 및 천정프레임은 알루미늄 재질의 압출부재들로 이루어지고,The underframe, side frame and ceiling frame are made of aluminum extruded members, 상기 압출 부재들 사이 또는 압출부재와 연결부재 사이의 결합부에는 보강부재가 삽입 설치되어 마찰용접에 의해 접합되되, A reinforcing member is inserted into the coupling part between the extruded members or between the extruded member and the connecting member and joined by friction welding. 상기 보강부재는 압출부재 또는 연결부재의 상부 플레이트 상단면 사이에 결합되는 제1 보강부재와, 양 단부가 상부 플레이트의 하단면 사이에 결합되는 U자형의 제2 보강부재를 포함하여 구성된 것을 특징으로 하는 철도차량용 차체.The reinforcing member is configured to include a first reinforcing member coupled between the upper surface of the upper plate of the extrusion member or the connecting member, and a second reinforcing member of the U-shaped both ends are coupled between the lower surface of the upper plate. Body for railway vehicles. 제 1항에 있어서,The method of claim 1, 상기 언더프레임과 사이드프레임의 사이 및 사이드프레임과 천정프레임의 사이에는 각각 연결부재가 마찰용접에 의해 접합되는 것을 특징으로 하는 철도차량용 차체.A connection body between the underframe and the side frame and between the side frame and the ceiling frame, respectively, characterized in that the connecting member is joined by friction welding. 삭제delete 삭제delete 제 1항에 있어서, The method of claim 1, 상기 제1보강부재는 위로 볼록한 형상으로 만곡되어 형성되고, 제1보강부재의 양단부에는 상기 상부 플레이트의 상단면에 형성되는 제1단턱부에 마찰용접에 의해 접합되는 절곡부가 형성된 것을 특징으로 하는 철도차량용 차체.The first reinforcing member is formed to be bent upwardly convex shape, railroad, characterized in that the bent portion is joined to the first stepped portion formed by the friction welding on the upper end of the upper plate on both ends of the first reinforcing member Car body. 제 1항에 있어서,The method of claim 1, 상기 제2보강부재의 양측 상단부에는 제2단턱부가 형성되되, 제2단턱부의 제1수평면은 제1보강부재의 하단면에 마찰용접에 의해 접합되고, 제2단턱부의 제2수평면은 상기 상부 플레이트 하단면에 마찰용접에 의해 접합되는 것을 특징으로 하는 철도차량용 차체.A second stepped portion is formed at both upper end portions of the second reinforcing member, and the first horizontal surface of the second stepped portion is joined to the bottom surface of the first reinforcing member by friction welding, and the second horizontal surface of the second stepped portion is the upper plate. A railway vehicle body, which is joined to the bottom surface by friction welding. 제 6항에 있어서,The method of claim 6, 상기 제2보강부재의 중앙 하단부에는 결합홈이 형성되고, 압출부재 또는 연결부재의 하부 플레이트 단부에는 결합돌기가 형성되어 상기 결합돌기가 결합홈에 삽입 결합되어 마찰용접에 의해 접합되는 것을 특징으로 하는 철도차량용 차체.A coupling groove is formed at the center lower end of the second reinforcing member, and a coupling protrusion is formed at the lower plate end of the extrusion member or the connection member, and the coupling protrusion is inserted into the coupling groove and joined by friction welding. Body for railroad car. 제 6항에 있어서,The method of claim 6, 상기 보강부재는 압출부재 및 연결부재의 하부 플레이트 사이의 연결부에 결합되는 제3보강부재를 더 포함하는 것을 특징으로 하는 철도차량용 차체.The reinforcing member further comprises a third reinforcing member coupled to the connecting portion between the lower plate of the extrusion member and the connecting member. 제 8항에 있어서,The method of claim 8, 상기 제2보강부재의 중앙 하단부에는 결합홈이 형성되고, 상기 결합홈에는 제3보강부재가 마찰용접에 의해 접합되는 것을 특징으로 하는 철도차량용 차체.A coupling groove is formed at the center lower end of the second reinforcing member, and the coupling reinforcement is connected to the coupling groove by friction welding.
KR1020090031962A 2009-04-13 2009-04-13 Body for railway vehicles KR101072373B1 (en)

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CN109050552A (en) * 2018-09-26 2018-12-21 重庆中车长客轨道车辆有限公司 A kind of railcar and its headstock

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JP2000317653A (en) 1999-05-14 2000-11-21 Hitachi Ltd Friction-stir-welding method and structure body therefor
US20030230625A1 (en) 1996-03-19 2003-12-18 Kinya Aota Friction stir wilding method and structure body
JP2004090087A (en) 2002-07-10 2004-03-25 Mitsubishi Heavy Ind Ltd Structure manufacturing method and device
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JP2000317653A (en) 1999-05-14 2000-11-21 Hitachi Ltd Friction-stir-welding method and structure body therefor
JP2004090087A (en) 2002-07-10 2004-03-25 Mitsubishi Heavy Ind Ltd Structure manufacturing method and device
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KR20150145456A (en) 2014-06-19 2015-12-30 가봉섭 Power generator using press device

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