WO2024258060A1 - 차량용 사이드실 - Google Patents
차량용 사이드실 Download PDFInfo
- Publication number
- WO2024258060A1 WO2024258060A1 PCT/KR2024/006184 KR2024006184W WO2024258060A1 WO 2024258060 A1 WO2024258060 A1 WO 2024258060A1 KR 2024006184 W KR2024006184 W KR 2024006184W WO 2024258060 A1 WO2024258060 A1 WO 2024258060A1
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- WO
- WIPO (PCT)
- Prior art keywords
- unit
- side sill
- vehicle side
- reinforcing
- section
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/02—Side panels
- B62D25/025—Side sills thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/157—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body for side impacts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D27/00—Connections between superstructure or understructure sub-units
- B62D27/02—Connections between superstructure or understructure sub-units rigid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/007—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of special steel or specially treated steel, e.g. stainless steel or locally surface hardened steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2410/00—Constructional features of vehicle sub-units
- B60Y2410/12—Production or manufacturing of vehicle parts
- B60Y2410/124—Welded parts
Definitions
- the present invention relates to a side sill for a vehicle.
- the side sill is very long in the longitudinal direction because it wraps around the entire passenger compartment of the car body.
- ultra-high strength materials or thick materials are applied to parts such as reinforcements to improve the crash absorption capacity of the side sill.
- Patent Document 1 KR 20-1998-0043143 U
- the present invention in one aspect, seeks to provide a side seal capable of forming a product even under a small forming load.
- the present invention in one aspect, seeks to provide a side seal in which the cost of mold manufacturing can be reduced by repeating a cross-section of the same pattern in the longitudinal direction.
- the present invention provides a vehicle side sill including: an inner panel; an outer panel that is joined to the inner panel in the width direction to form a hollow portion together with the inner panel; and a reinforcing frame that is arranged in the hollow portion and in which a plurality of unit reinforcing bodies having corresponding shapes are connected in the length direction.
- the vehicle side sill of the present invention has the effect of enabling molding of a product even under a small molding load.
- the above unit reinforcement body can be joined to the inner panel to form a closed cross-section.
- the above unit reinforcement body can be manufactured integrally by forming a single steel plate.
- the above unit reinforcement body can be manufactured by forming a single steel plate having a tensile strength of 780 MPa or more.
- the above unit reinforcement may include a recessed portion in the longitudinal cross-section.
- the above-mentioned uneven portion may have protruding surfaces and indented surfaces alternately formed in the longitudinal direction, and an inclined surface may be formed between the protruding surfaces and the indented surfaces.
- At least one of the plurality of unit reinforcing members connected in the longitudinal direction may have different steel grades or tensile strengths.
- the above reinforcing frame can be welded so that two unit reinforcing bodies connected in the longitudinal direction are in contact with each other at the longitudinal ends.
- the above reinforcing frame has an overlapping area in which two unit reinforcing bodies connected in the longitudinal direction overlap each other in the thickness direction, and can be welded and joined in the overlapping area.
- the above unit reinforcing body includes a first unit reinforcing body having one side joined to the inner panel to form a first closed cross-section; and a second unit reinforcing body having one side joined to the first unit reinforcing body to form a second closed cross-section; and the reinforcing frame includes a first overlapping region in which two first unit reinforcing bodies connected in the longitudinal direction overlap in the thickness direction; and a second overlapping region in which two second unit reinforcing bodies connected in the longitudinal direction overlap in the thickness direction; and the first overlapping region and the second overlapping region can be arranged at positions corresponding to each other in the longitudinal direction.
- the two first unit reinforcing bodies of the first overlapping area and the two second unit reinforcing bodies of the second overlapping area can be welded and joined in a four-layered state.
- the above unit reinforcing body includes a first unit reinforcing body having one side joined to the inner panel to form a first closed cross-section; and a second unit reinforcing body having one side joined to the first unit reinforcing body to form a second closed cross-section; and the reinforcing frame includes a first overlapping region in which two first unit reinforcing bodies connected in the longitudinal direction overlap in the thickness direction; and a second overlapping region in which two second unit reinforcing bodies connected in the longitudinal direction overlap in the thickness direction; and the first overlapping region and the second overlapping region can be arranged to be staggered in the longitudinal direction.
- two of the first unit reinforcing bodies and one of the second unit reinforcing bodies of the first overlapping area can be welded and joined in a three-layered state.
- the two second unit reinforcements and the first unit reinforcement of the second overlapping region can be welded and joined in a three-layered state.
- the above unit reinforcement body may include a first unit reinforcement body having one side joined to the inner panel to form a first closed cross-section; and a second unit reinforcement body having one side joined to the first unit reinforcement body to form a second closed cross-section.
- the first unit reinforcing body has a bending point that protrudes outward from the first closed cross-section, and the first unit reinforcing body can be formed at a position where the bending point is spaced apart from the first inner surface of the inner panel by 30 to 70% of the installation width of the first unit reinforcing body.
- the first unit reinforcing body includes a first section formed to extend in the first inner surface direction of the inner panel with the bending point as the boundary; and a second section formed to extend in the second inner surface direction of the outer panel by being bent with the bending point as the boundary, and forming a bending angle with the first section within the first closed cross-section; and the first unit reinforcing body has the bending angle formed within the first closed cross-section, and the bending angle can have a range of 165 to 175 degrees.
- the above inner panel is a vehicle side sill manufactured as a single piece by forming a single steel plate.
- the above outer panel can be manufactured as a single piece by forming a single steel plate.
- the present invention provides a method for manufacturing a vehicle side sill, including a parts preparation step of preparing an inner panel, a plurality of unit reinforcing bodies, and an outer panel; a reinforcing frame manufacturing step of manufacturing a reinforcing frame by connecting a plurality of the unit reinforcing bodies in the longitudinal direction; a reinforcing frame joining step of joining the reinforcing frame to the inner panel; and an outer panel joining step of forming a hollow portion by joining the outer panel to the inner panel and arranging the reinforcing frame inside the hollow portion.
- the mold manufacturing cost can be reduced by repeating the cross-section of the same pattern in the longitudinal direction.
- Figure 1 is a perspective view of a vehicle side sill of a comparative example in contrast to the vehicle side sill of the present invention.
- Fig. 2 is a perspective view of a reinforcing frame of a side sill for a vehicle of the comparative example of Fig. 1.
- FIG. 3 is a perspective view of a vehicle side sill according to the first embodiment of the present invention.
- FIG. 4 is a perspective view of a reinforcing frame of a vehicle side sill of the first embodiment of FIG. 3.
- Figure 5 is a perspective view showing an enlarged detail of part 'A' of Figure 4.
- Figure 6 is a cross-sectional view taken along the line I-I' of Figure 3.
- FIG. 7 is a drawing showing the position of the bending point of the vehicle side sill according to the first embodiment of FIG. 3.
- Figure 8 is a perspective view of a vehicle side sill according to the second embodiment of the present invention.
- FIG. 9 is a perspective view of a reinforcing frame of a vehicle side sill of the second embodiment of FIG. 8.
- Figure 10 is a perspective view showing an enlarged detail of part 'B' of Figure 9.
- Fig. 11 is a cross-sectional view taken along the line II-II' of Fig. 9.
- Fig. 12 is a perspective view of a reinforcing frame of a side sill for a vehicle included in the third embodiment of the present invention.
- Figure 13 is a perspective view showing an enlarged detail of part 'C' of Figure 12.
- Fig. 14 is a cross-sectional view taken along the III-III' direction of Fig. 13.
- Figure 15 is a perspective view showing an enlarged detail of part 'D' of Figure 12.
- Fig. 16 is a cross-sectional view taken along the line IV-IV' of Fig. 15.
- FIGS 17a to 17c are drawings showing the results of deformation analysis of the vehicle side sill of the second embodiment of Figure 8.
- Figures 18a to 18c are drawings showing the results of deformation analysis of the vehicle side sill of the comparative example of Figure 1.
- Fig. 19 is a load-displacement diagram of the vehicle side sill of the comparative example of Fig. 1 and the vehicle side sill of the second embodiment of Fig. 8.
- the vehicle side sill of the present invention is illustrated in the left-right, up-down, and front-back directions, and although the terms left-right, up-down, and front-back directions are used in the detailed description of the invention, this is for the convenience of explanation, and it is to be noted that the technical features of the vehicle side sill of the present invention are not limited to these directions.
- the X-axis illustrated in the attached drawing is the width direction of the vehicle side sill
- the Y-axis is the length direction of the vehicle side sill
- the Z-axis is the height direction of the vehicle side sill.
- Fig. 1 is a perspective view of a vehicle side sill of a comparative example in contrast to the vehicle side sill of the present invention.
- Fig. 2 is a perspective view of a reinforcing frame (30) of the vehicle side sill of the comparative example of Fig. 1.
- the inner panel (10') and the outer panel (20') are the same as those of the first embodiment described later, and unlike the first embodiment described later, the vehicle side sill of the comparative example is different in that one reinforcing frame (30') is formed to extend along the entire length direction (Y).
- the forming load increases in proportion to the volume of the divided parts.
- the forming load can be reduced by the number of divisions.
- a reinforcing frame (30) can be divided into three in the longitudinal direction (Y) to produce a unit reinforcing body (30U).
- the forming load for forming each of the three-divided unit reinforcing bodies (30U) can be reduced to approximately 1/3 compared to the forming load when the entire non-divided reinforcing frame (30') is formed as a single piece.
- FIG. 3 is a perspective view of a vehicle side sill according to the first embodiment of the present invention
- FIG. 4 is a perspective view of a reinforcing frame (30) of the vehicle side sill according to the first embodiment of FIG. 3.
- Figure 5 is a perspective view showing an enlarged detail of part 'A' of Figure 4
- Figure 6 is a cross-sectional view in the X-Z axis direction of Figure 3.
- a vehicle side sill according to one embodiment of the present invention may include an inner panel (10), an outer panel (20), and a reinforcing frame (30).
- the inner panel (10) can be placed on the inner side of the side sill in the width direction (X) in the X-axis direction.
- the outer panel (20) can be joined to the inner panel (10) in the width direction (X) to form a hollow portion (S) together with the inner panel (10).
- the outer panel (20) can be arranged on the outside of the width direction (X) of the side sill in the X-axis direction.
- the inner panel (10) and the outer panel (20) can be welded together to form a welded portion (W).
- the inner panel (10) and the outer panel (20) can be welded together by spot welding or the like.
- the reinforcing frame (30) is placed in the hollow portion (S), and a plurality of unit reinforcing bodies (30U) having corresponding shapes can be connected in the longitudinal direction (Y).
- the reinforcing frame (30) may have a shape in which a plurality of unit reinforcing bodies (30U) correspond to each other.
- two adjacent unit reinforcing bodies (30U) that are connected may have their longitudinal (Y) ends welded to each other.
- the reinforcing frame (30) is illustrated and described as having three unit reinforcing bodies (30U) connected in the longitudinal direction (Y), but it is not necessarily limited to this and it is also possible for two or more than three unit reinforcing bodies (30U) to be connected in the longitudinal direction (Y).
- the unit reinforcement (30U) is shorter than the reinforcing frame (30), the unit reinforcement (30U) can be manufactured under a small forming load.
- a plurality of unit reinforcing bodies (30U) may have cross sections corresponding to each other on the X-Z axis cross section of the side sill, and a certain unit pattern may be repeated in the longitudinal direction (Y).
- the unit reinforcing bodies (30U) may have a certain unit pattern in which a protruding portion (P), which will be described later, is repeated in the longitudinal direction (Y).
- the unit reinforcement (30U) can be manufactured from steel.
- steel is used to manufacture the unit reinforcement (30U)
- the impact energy absorption capacity is excellent, the mechanical rigidity is improved, and the material cost can be drastically reduced compared to when aluminum is used for the unit reinforcement (30U).
- a plurality of unit reinforcements (30U) may have corresponding shapes and have the same length in the longitudinal direction (Y).
- a plurality of unit reinforcements (30U) may have corresponding shapes and have different lengths in the longitudinal direction (Y).
- a plurality of unit reinforcements (30U) can be welded together to form a weld (W).
- the weld (W) can be formed by spot welding, laser welding, arc welding, etc.
- At least one of the inner panel (10), the outer panel (20), the first unit reinforcement (100), and the second unit reinforcement (200) may be composed of steel.
- the inner panel (10), the outer panel (20), the first unit reinforcement (100), and the second unit reinforcement (200) may be composed of steel. Accordingly, the mechanical rigidity of the vehicle side sill may be improved.
- the reinforcing frame (30) is manufactured by manufacturing a plurality of unit reinforcing bodies (30U) divided in the longitudinal direction (Y) and connecting the plurality of unit reinforcing bodies (30U) in the longitudinal direction (Y) to form the reinforcing frame (30), thereby enabling the unit reinforcing bodies (30U) to be manufactured with a smaller forming load, thereby enabling the reinforcing frame (30) to be manufactured.
- the unit reinforcement body (30U) of the side sill for vehicles can be formed even under a small forming load, the production of the product is now possible even by small and medium-sized enterprises, which secures the diversity of sales channels for the product and has the effect of improving the salesability of the product.
- the inner panel (10) can be manufactured as a single piece by forming a single steel plate.
- the inner panel (10) can be manufactured by forming a single steel plate along the entire length direction (Y) of the vehicle side sill.
- the outer panel (20) can be manufactured as a single piece by forming a single steel plate.
- the outer panel (20) can be manufactured by forming a single steel plate along the entire length direction (Y) of the vehicle side sill.
- the outer panel (20) is manufactured as a single piece of steel by forming a single steel plate, so that the mechanical rigidity of the vehicle side sill can be improved as the outer panel (20) composed of a single steel plate moves as a single piece.
- the inner panel (10) and the outer panel (20) can each be formed by folding a single steel plate into multiple stages.
- the closed cross-section formed by joining the first unit reinforcing body (100) among the unit reinforcing bodies (30U) to the inner panel (10) may be the first closed cross-section (M1) described later.
- the unit reinforcement (30U) can be manufactured integrally by forming a single steel plate.
- the unit reinforcement body (30U) is manufactured as a single piece by forming a single steel plate, the mechanical rigidity of the vehicle side sill can be improved as the unit reinforcement body (30U) composed of a single steel plate moves as a single piece.
- the unit reinforcement (30U) can be manufactured using a forming method such as foam forming or crash forming.
- a forming method such as foam forming or crash forming.
- a unit reinforcement (30U) can be manufactured by forming a single steel plate having a tensile strength of 780 MPa or more.
- the present invention improves mechanical rigidity by utilizing high-strength steel having a tensile strength of 780 MPa or more in the production of a reinforcing frame (30) for a vehicle side sill, and enables the production of a unit reinforcing body (30U) with a low forming load, thereby enabling the production of the product even by small and medium-sized enterprises, thereby securing a variety of sales channels for the product and thereby improving the salability of the product.
- the unit reinforcement (30U) may include a protruding portion (P) in the longitudinal direction (Y) cross-section.
- the unit reinforcement (30U) may have the protruding portion (P) repeated in the longitudinal direction (Y).
- the unit reinforcing body (30U) may have a pattern of a certain shape, such as a protruding portion (P) to be described later, repeated in the longitudinal direction (Y).
- a plurality of unit reinforcing bodies (30U) may have cross sections that correspond to each other on the X-Z axis cross section and may have a certain pattern repeated in the longitudinal direction (Y).
- the uneven portion (P) has a protruding surface (P1) and an indented surface (P2) alternately formed in the longitudinal direction (Y), and an inclined surface (P3) can be formed between the protruding surface (P1) and the indented surface (P2).
- the reinforcing frame (30) may have at least one unit reinforcing body (30U) connected in the longitudinal direction (Y) that may have a different steel grade or tensile strength.
- the unit reinforcement (30U) placed in the central region in the longitudinal direction (Y) may have a different steel grade from the unit reinforcements (30U) placed in the end regions on both sides in the longitudinal direction (Y).
- a unit reinforcement (30U) placed in the central region in the longitudinal direction (Y) can have a greater tensile strength than a unit reinforcement (30U) placed in the end regions on both sides in the longitudinal direction (Y).
- the reinforcing frame (30) can be welded so that two adjacent unit reinforcing bodies (30U) are joined with their longitudinal (Y) ends facing each other.
- the two adjacent unit reinforcing bodies (30U) can have cross sections with corresponding longitudinal (Y) end shapes.
- the unit reinforcing bodies (30U) can be welded to each other to form a weld (W).
- the weld (W) can be formed by laser welding, arc welding, or the like.
- the unit reinforcement body (30U) may include a first unit reinforcement body (100) and a second unit reinforcement body (200).
- the first unit reinforcing body (100) can have one side joined to the inner panel (10) to form a first closed cross-section (M1). Accordingly, the mechanical rigidity of the vehicle side sill can be improved.
- the first unit reinforcement body (100) may include a first upper flange (110), a pair of first web members (130), and a pair of first lower flanges (150) on the X-Z axis cross-section of the side sill.
- a first web member (130) may be connected to each end of the first upper flange (110) in the height direction (Z).
- the first upper flange (110) may be arranged at the boundary between the first closed section (M1) and the second closed section (M2).
- a first unit reinforcement body (100) and an inner panel (10) may be welded together to form a weld (W).
- the weld (W) may be formed by spot welding, etc.
- the second unit reinforcing body (200) can have one side joined to the first unit reinforcing body (100) to form a second closed cross-section (M2). Accordingly, the mechanical rigidity of the vehicle side sill can be improved.
- the second unit reinforcement body (200) may include a second upper flange (210), a pair of second web members (230), and a pair of second lower flanges (250) on the X-Z axis cross-section of the side sill.
- the second lower flange (250) of the second unit reinforcement (200) can be joined to the first web member (130) of the first unit reinforcement (100).
- the second lower flange (250) may have a step formed between the second web members (230), and the Z-axis distance between a pair of second lower flanges (250) may be wider than the Z-axis distance between a pair of second web members (230).
- a second unit reinforcing member (200) of a reinforcing frame (30) and an outer panel (20) may be joined to form a weld (W).
- the weld (W) may be formed by spot welding or laser welding.
- a bonding portion (V) may be formed when the second unit reinforcing body (200) of the reinforcing frame (30) and the outer panel (20) are joined.
- the bonding portion (V) may be formed using an adhesive.
- the second unit reinforcement (200) of the reinforcing frame (30) and the outer panel (20) may not be joined.
- a first unit reinforcement body (100) and a second unit reinforcement body (200) may be welded together to form a weld (W).
- the weld (W) may be formed by spot welding or laser welding.
- the protruding surface (P1) of the first unit reinforcement (100) may overlap the protruding surface (P1) of the second unit reinforcement (200), and the inward surface (P2) of the first unit reinforcement (100) may overlap the inward surface (P2) of the second unit reinforcement (200).
- FIG. 7 is a drawing showing the position (U) of the bending point (170) of the vehicle side sill according to the first embodiment of FIG. 3.
- the first unit reinforcement body (100) may have a bending point (170) that protrudes outward from the first closed cross-section (M1).
- the first unit reinforcement (100) can be formed at a position where the position (U) of the bending point (170) is spaced apart from the first inner surface (11) of the inner panel (10) by 30 to 70% of the installation width (T) of the first unit reinforcement (100).
- the bending point (170) is less than 30% or more than 70% of the installation width (T) of the first unit reinforcement (100) on the first inner surface (11) of the inner panel (10), normal compression may not occur because bending induction is not performed well at the bending point (170) of the first unit reinforcement (100).
- first unit reinforcement body (100) If normal compression failure does not occur in the first unit reinforcement body (100), a problem may occur in which the first unit reinforcement body (100) cannot exhibit sufficient load performance due to deformation that causes it to tilt. In addition, this may be a major factor in causing instability in the vehicle side sill from exhibiting stable collision energy absorption performance under various collision environments.
- the first unit reinforcement body (100) may include a first section (131) and a second section (133).
- the first section (131) can be formed to extend in the direction of the first inner surface (11) of the inner panel (10) with the bending point (170) as the boundary.
- the second section (133) is formed by extending toward the second inner surface (21) of the outer panel (20) by bending with the bending point (170) as the boundary, and can form a bending angle (190) with the first section (131) within the first closed cross-section (M1).
- a bending point (170) may be provided at the boundary between the first section (131) and the second section (133).
- the first unit reinforcement body (100) can be bent into a first section (131) and a second section (133) with the bending point (170) as the boundary.
- the bending angle (190) is formed inside the first closed cross-section (M1) and can be configured to be less than 180 degrees.
- the first unit reinforcing body (100) has a bending angle (190) formed inside the first closed cross-section (M1), and the bending angle (190) can have a range of 165 to 175 degrees.
- the angle ( ⁇ ) formed by the extension line of the first section (131) and the extension line of the second section (133) can have a range of 5 to 15 degrees.
- a bending angle (190) can be formed within the first closed cross-section (M1).
- the first unit reinforcement (100) has a bending angle (190) in the range of 165 to 175 degrees, so that the rigidity of the first unit reinforcement (100) can be sufficiently secured while stably inducing bending at the bending point (170).
- the bending angle (190) of the first unit reinforcement (100) is less than 165 degrees, bending can be easily induced at the bending point (170), but if bending is induced too easily at the bending point (170) of the first unit reinforcement (100), a problem may occur in which the load performance may be reduced as the first unit reinforcement (100) bends at the bending point (170) before it exerts the designed load performance.
- a problem may occur in which the first unit reinforcement body (100) does not experience normal compression collapse and cannot exhibit sufficient load performance due to tilting deformation. In addition, this may be a major factor in the instability of the vehicle side sill from exhibiting stable collision energy absorption performance under various collision environments.
- a problem may occur in which the designed load performance cannot be achieved due to the occurrence of tilting deformation instead of normal compression collapse in the first unit reinforcement body (100).
- Fig. 8 is a perspective view of a vehicle side sill according to the second embodiment of the present invention.
- Fig. 9 is a perspective view of a reinforcing frame of the vehicle side sill according to the second embodiment of Fig. 8.
- Fig. 10 is a perspective view showing an enlarged detail of part 'B' of Fig. 9.
- Fig. 11 is a cross-sectional view taken along the line II-II' of Fig. 9.
- Fig. 12 is a perspective view of a reinforcing frame of a side sill for a vehicle included in the third embodiment of the present invention.
- Fig. 13 is a perspective view showing an enlarged detail of a portion 'C' of Fig. 12.
- Fig. 14 is a cross-sectional view taken along line III-III' of Fig. 13.
- Fig. 15 is a perspective view showing an enlarged detail of part 'D' of Fig. 12.
- Fig. 16 is a cross-sectional view taken along the line IV-IV' of Fig. 15.
- two unit reinforcing bodies (30U) connected in the longitudinal direction of a vehicle side sill are welded with their longitudinal ends facing each other.
- vehicle side sills according to the second and third embodiments of the present invention are configured to apply the lap welding method described later instead of the butt welding method of the first embodiment, and the remaining components may be the same as the configuration of the vehicle side sill of the first embodiment described above.
- the reinforcing frame has an overlapping area in which two unit reinforcing bodies (30U) connected in the longitudinal direction overlap each other in the thickness direction, and can be welded and joined in the overlapping area.
- Two unit reinforcements (30U) connected in the longitudinal direction can form an overlapping area when the unit reinforcement (30U) on one side is inserted longitudinally into the unit reinforcement (30U) on the other side.
- the cross-section of the unit reinforcement (30U) on one side inserted inward can be manufactured to have a smaller dimension than the cross-section of the unit reinforcement (30U) on the other side placed on the outside.
- a unit reinforcing body (30U) may include the first unit reinforcing body (100) and the second unit reinforcing body (200) described above.
- the reinforcing frame may include a first overlapping area (N1) and a second overlapping area (N2).
- first overlapping region (N1) two first unit reinforcing bodies (100) connected in the longitudinal direction can overlap in the thickness direction.
- second overlapping region (N2) two second unit reinforcing bodies (200) connected in the longitudinal direction can overlap in the thickness direction.
- the above first overlapping area (N1) and the above second overlapping area (N2) can be arranged at positions corresponding to each other in the longitudinal direction.
- the first overlapping area (N1) and the second overlapping area (N2) can overlap each other at least partially.
- the two first unit reinforcing bodies (100) of the first overlapping area (N1) and the two second unit reinforcing bodies (200) of the second overlapping area (N2) can be welded together in a four-layered state.
- the first overlapping area (N1) can be welded in a state where two first unit reinforcing bodies (100) connected in the longitudinal direction are overlapped in two layers.
- the second overlapping area (N2) can be welded in a state where two second unit reinforcing bodies (200) connected in the longitudinal direction are overlapped in two layers.
- a unit reinforcing body (30U) may include the first unit reinforcing body (100) and the second unit reinforcing body (200) described above.
- the reinforcing frame may include the first overlapping area (N1) and the second overlapping area (N2) described above.
- the first overlapping area (N1) and the second overlapping area (N2) may be arranged to be staggered from each other in the longitudinal direction.
- the second unit reinforcement (200) can be installed so as to overlap to cover at least a portion of the first overlapping area (N1).
- two of the first unit reinforcements (100) and one of the second unit reinforcements (200) of the first overlapping area (N1) can be welded together in a three-layered state.
- the second overlapping area (N2) may be installed to cover a portion of the first unit reinforcement body (100). In the portion where the second overlapping area (N2) overlaps the first unit reinforcement body (100), two of the second unit reinforcement bodies (200) of the second overlapping area (N2) and the first unit reinforcement body (100) may be welded together in a three-layered state.
- the vehicle side sill of the second embodiment is formed by connecting a plurality of unit reinforcing bodies (30U) having shapes corresponding to each other in the longitudinal direction (Y) as reinforcing frames, and the vehicle side sill of the comparative example is different in that one reinforcing frame (30') is formed by extending in the longitudinal direction (Y).
- FIGS 17a to 17c are drawings showing the results of deformation analysis of the vehicle side sill of the second embodiment.
- Fig. 17a is a drawing showing the deformation analysis result of the initial period of the collision of the second embodiment
- Fig. 17b is a drawing showing the deformation analysis result of the middle period of the collision of the second embodiment
- Fig. 17c is a drawing showing the deformation analysis result of the late period of the collision of the second embodiment.
- Figures 18a to 18c are drawings showing the results of deformation analysis of a side sill for a vehicle of a comparative example.
- Figure 18a is a drawing showing the deformation analysis result of the initial period of the collision of the comparative example
- Figure 18b is a drawing showing the deformation analysis result of the middle period of the collision of the comparative example
- Figure 18c is a drawing showing the deformation analysis result of the later period of the collision of the comparative example.
- Fig. 19 is a load-displacement diagram of the vehicle side sill of the comparative example of Fig. 1 and the vehicle side sill of the second embodiment of Fig. 8.
- the load-displacement value of the vehicle side sill of the comparative example of Fig. 1 is represented as the first value (L1)
- the load-displacement value of the vehicle side sill of the second embodiment of Fig. 8 is represented as the second value (L2).
- the internal energy of the side sill of the vehicle of the comparative example was 51.2 KJ
- the weight of the side sill of the vehicle of the comparative example was 18.8 kg
- the internal energy of the side sill of the vehicle of the second embodiment was 51.9 KJ
- the weight of the side sill of the vehicle of the second embodiment was 19.0 kg.
- the vehicle side sill of the comparative example has an internal energy ratio per 1 kg of 2.72 (KJ/kg)
- the vehicle side sill of the second embodiment has an internal energy ratio per 1 kg of 2.73 (KJ/kg). It can be seen that the second embodiment and the comparative example have almost similar internal energy ratios per 1 kg and almost similar energy absorption performances per unit weight.
- the vehicle side sill of the second embodiment of the present invention has the effect of stably securing collision performance while being capable of being formed even under a small forming load.
- vehicle side sills according to the first and third embodiments of the present invention also secured performance similar to that of the vehicle side sill of the second embodiment of the present invention.
- a method for manufacturing a vehicle side sill may include a parts preparation step, a reinforcing frame (30) manufacturing step, a reinforcing frame (30) bonding step, and an outer panel (20) bonding step.
- the component preparation stage can prepare an inner panel (10), multiple unit reinforcements (30U), and an outer panel (20).
- the reinforcing frame (30) manufacturing step can manufacture the reinforcing frame (30) by connecting a plurality of unit reinforcing bodies (30U) in the longitudinal direction (Y).
- the reinforcing frame (30) can be formed by connecting a plurality of unit reinforcing bodies (30U) having corresponding shapes in the longitudinal direction (Y).
- a weld (W) can be formed by welding a plurality of unit reinforcing bodies (30U) to each other.
- the reinforcing frame (30) may have a shape in which a plurality of unit reinforcing bodies (30U) correspond to each other.
- the reinforcing frame (30) may be formed such that two adjacent unit reinforcing bodies (30U) are welded together in a state in which their longitudinal (Y) ends are abutted against each other.
- the two adjacent unit reinforcing bodies (30U) may have a cross-section in which their longitudinal (Y) ends correspond to each other.
- the unit reinforcing bodies (30U) may be welded together to form a weld (W).
- the weld (W) may be formed by laser welding, arc welding, or the like.
- a first unit reinforcement body (100) and a second unit reinforcement body (200) may be welded together to form a weld (W).
- the weld (W) may be formed by spot welding or laser welding.
- the reinforcing frame (30) joining step can join the reinforcing frame (30) to the inner panel (10).
- the reinforcing frame (30) and the unit reinforcing body (30U) can be joined to the inner panel (10) to form a closed cross-section.
- the reinforcing frame (30) and the inner panel (10) can be welded together to form a weld (W).
- the weld (W) can be formed by spot welding, etc.
- the first unit reinforcing body (100) of the reinforcing frame (30) and the inner panel (10) can be welded together to form a weld (W).
- the outer panel (20) bonding step may be performed by bonding the outer panel (20) to the inner panel (10) to form a hollow portion (S), and placing a reinforcing frame (30) inside the hollow portion (S).
- the inner panel (10) and the outer panel (20) can be welded together to form a welded portion (W).
- the inner panel (10) and the outer panel (20) can be welded together by spot welding or the like.
- the outer panel (20) may or may not be joined to the second unit reinforcing body (200) of the reinforcing frame (30).
- a second unit reinforcing member (200) of a reinforcing frame (30) and an outer panel (20) may be joined to form a weld (W).
- the weld (W) may be formed by spot welding or laser welding.
- a bonding portion (V) may be formed when the second unit reinforcing body (200) of the reinforcing frame (30) and the outer panel (20) are joined.
- the bonding portion (V) may be formed using an adhesive.
- the second unit reinforcement (200) and the outer panel (20) may not be joined.
- the configuration of the inner panel (10), outer panel (20), reinforcing frame (30), unit reinforcing body (30U), etc. of the vehicle side sill utilized in the method for manufacturing the vehicle side sill is the same as the configuration of the vehicle side sill as already explained, and thus a detailed description thereof is omitted to avoid duplication.
- the method for manufacturing a side sill for a vehicle is exemplified as a preferred manufacturing method so that a person having ordinary knowledge in the technical field of the present invention can easily carry out the present invention.
- the method may be modified and implemented according to a different order depending on specific field conditions, or other auxiliary processes may be added.
- Section 2 150 Lower Flange 1
- Second unit reinforcement 210 Second upper flange
- N1 First overlapping region
- N2 Second overlapping region
- M1 First closed section
- M2 Second closed section
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims (20)
- 이너패널;상기 이너패널과 폭방향으로 결합되어 상기 이너패널과 함께 중공부를 형성하는 아우터패널; 및상기 중공부에 배치되고, 서로 대응되는 형상을 가지는 복수 개의 단위보강체가 길이방향으로 연결되는 보강프레임;을 포함하는 차량용 사이드 실.
- 제1항에 있어서,상기 단위보강체는 상기 이너패널과 접합되어 폐단면을 형성하는 차량용 사이드 실.
- 제1항에 있어서,상기 단위보강체는 하나의 강판을 성형하여 일체로 제작되는 차량용 사이드 실.
- 제1항에 있어서,상기 단위보강체는 780MPa 이상의 인장강도를 가지는 하나의 강판을 성형하여 제작되는 차량용 사이드 실.
- 제1항에 있어서,상기 단위보강체는 길이방향 단면상에서 요철부를 포함하는 차량용 사이드 실.
- 제5항에 있어서, 상기 요철부는,길이방향으로 돌출면과 내입면이 교번적으로 형성되고, 상기 돌출면과 상기 내입면의 사이에 경사면이 형성되는 차량용 사이드 실.
- 제1항에 있어서, 상기 보강프레임은,길이방향으로 연결되는 복수 개의 상기 단위보강체 중 적어도 어느 하나가 강종이나 인장강도가 상이한 차량용 사이드 실.
- 제1항에 있어서, 상기 보강프레임은,길이방향으로 연결되는 2개의 상기 단위보강체는 길이방향 단부가 서로 맞대진 상태에서 용접 접합되는 차량용 사이드 실.
- 제1항에 있어서, 상기 보강프레임은,길이방향으로 연결되는 2개의 상기 단위보강체가 서로 두께방향으로 겹쳐진 겹침영역을 가지고, 상기 겹침영역에서 용접 접합되는 차량용 사이드 실.
- 제9항에 있어서, 상기 단위보강체는,일측이 상기 이너패널과 접합되어 제1 폐단면을 형성하는 제1 단위보강체; 및일측이 상기 제1 단위보강체에 접합되어 제2 폐단면을 형성하는 제2 단위보강체;를 포함하고,상기 보강프레임은,길이방향으로 연결되는 2개의 상기 제1 단위보강체가 두께방향으로 겹쳐지는 제1 겹침영역; 및길이방향으로 연결되는 2개의 상기 제2 단위보강체가 두께방향으로 겹쳐지는 제2 겹침영역;을 포함하고,상기 제1 겹침영역과 상기 제2 겹침영역은 길이방향으로 서로 대응되는 위치에 배치되는 차량용 사이드 실.
- 제10항에 있어서,상기 제1 겹침영역과 상기 제2 겹침영역이 겹쳐진 부분에서,상기 제1 겹침영역의 2개의 상기 제1 단위보강체 및 상기 제2 겹침영역의 2개의 상기 제2 단위보강체가 4겹으로 겹쳐진 상태에서 용접 접합되는 차량용 사이드 실.
- 제9항에 있어서, 상기 단위보강체는,일측이 상기 이너패널과 접합되어 제1 폐단면을 형성하는 제1 단위보강체; 및일측이 상기 제1 단위보강체에 접합되어 제2 폐단면을 형성하는 제2 단위보강체;를 포함하고,상기 보강프레임은,길이방향으로 연결되는 2개의 상기 제1 단위보강체가 두께방향으로 겹쳐지는 제1 겹침영역; 및길이방향으로 연결되는 2개의 상기 제2 단위보강체가 두께방향으로 겹쳐지는 제2 겹침영역;을 포함하고,상기 제1 겹침영역과 상기 제2 겹침영역은 길이방향으로 서로 엇갈리게 배치되는 차량용 사이드 실.
- 제12항에 있어서,상기 제2 단위보강체가 상기 제1 겹침영역과 겹쳐진 부분에서,상기 제1 겹침영역의 2개의 상기 제1 단위보강체 및 1개의 상기 제2 단위보강체가 3겹으로 겹쳐진 상태에서 용접 접합되는 차량용 사이드 실.
- 제12항에 있어서,상기 제2 겹침영역이 상기 제1 단위보강체와 겹쳐진 부분에서,상기 제2 겹침영역의 2개의 상기 제2 단위보강체 및 상기 제1 단위보강체가 3겹으로 겹쳐진 상태에서 용접 접합되는 차량용 사이드 실.
- 제1항에 있어서, 상기 단위보강체는,일측이 상기 이너패널과 접합되어 제1 폐단면을 형성하는 제1 단위보강체; 및일측이 상기 제1 단위보강체에 접합되어 제2 폐단면을 형성하는 제2 단위보강체;를 포함하고,상기 제1 단위보강체는,상기 제1 폐단면에서 외측으로 돌출된 형태의 벤딩포인트를 가지는 차량용 사이드 실.
- 제15항에 있어서, 상기 제1 단위보강체는,상기 벤딩포인트의 위치가 상기 이너패널의 제1 내면에서 상기 제1 단위보강체의 설치폭의 30 ~ 70 % 만큼 거리를 두고 이격된 위치에 형성되는 차량용 사이드 실.
- 제15항에 있어서, 상기 제1 단위보강체는,상기 벤딩포인트를 경계로 상기 이너패널의 제1 내면 방향으로 연장 형성되는 제1 구간; 및상기 벤딩포인트를 경계로 절곡되어 상기 아우터패널의 제2 내면 방향으로 연장 형성되고, 상기 제1 폐단면의 내부에서 상기 제1 구간과 벤딩각을 형성하는 제2 구간;을 포함하고,상기 제1 단위보강체는,상기 벤딩각이 상기 제1 폐단면의 내부에 형성되고, 상기 벤딩각은 165 ~ 175 도의 범위를 가지는 차량용 사이드 실.
- 제1항에 있어서,상기 이너패널은 하나의 강판을 성형하여 일체로 제작되는 차량용 사이드 실.
- 제1항에 있어서,상기 아우터패널은 하나의 강판을 성형하여 일체로 제작되는 차량용 사이드 실.
- 이너패널, 복수 개의 단위보강체 및 아우터패널을 준비하는 부품준비단계;복수 개의 상기 단위보강체를 길이방향으로 연결하여 보강프레임을 제작하는 보강프레임 제작단계;상기 이너패널에 상기 보강프레임을 접합하는 보강프레임 접합단계; 및상기 이너패널에 상기 아우터패널을 접합하여 중공부를 형성하고, 상기 중공부의 내부에 상기 보강프레임을 배치하는 아우터패널 접합단계;를 포함하는 차량용 사이드 실의 제조방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MX2025015051A MX2025015051A (es) | 2023-06-15 | 2024-05-08 | Estribo lateral para vehiculo |
| CN202480037857.2A CN121335832A (zh) | 2023-06-15 | 2024-05-08 | 用于车辆的侧梁 |
| EP24823581.4A EP4729397A1 (en) | 2023-06-15 | 2024-05-08 | Side sill for vehicle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2023-0076800 | 2023-06-15 | ||
| KR1020230076800A KR20240176261A (ko) | 2023-06-15 | 2023-06-15 | 차량용 사이드실 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024258060A1 true WO2024258060A1 (ko) | 2024-12-19 |
Family
ID=93852222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2024/006184 Ceased WO2024258060A1 (ko) | 2023-06-15 | 2024-05-08 | 차량용 사이드실 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4729397A1 (ko) |
| KR (1) | KR20240176261A (ko) |
| CN (1) | CN121335832A (ko) |
| MX (1) | MX2025015051A (ko) |
| WO (1) | WO2024258060A1 (ko) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980043143U (ko) | 1996-12-24 | 1998-09-25 | 양재신 | 자동차용 사이드 실의 보강구조 |
| JP2016002781A (ja) * | 2014-06-13 | 2016-01-12 | アイシン高丘株式会社 | 車体部品 |
| KR20220048138A (ko) * | 2020-10-12 | 2022-04-19 | 현대자동차주식회사 | 전기 자동차용 스크럼 타입 사이드 실 구조 |
| US20220281304A1 (en) * | 2019-05-07 | 2022-09-08 | Arcelormittal | Side sill part for an automotive vehicle |
| KR102492896B1 (ko) * | 2022-07-25 | 2023-01-30 | 쌍용자동차 주식회사 | 프레임 타입 전기차의 배터리 장착 공간 확보 및 측면 충돌 개선 구조 |
| KR20230071531A (ko) * | 2021-11-16 | 2023-05-23 | 주식회사 포스코 | 차량용 사이드실 |
-
2023
- 2023-06-15 KR KR1020230076800A patent/KR20240176261A/ko active Pending
-
2024
- 2024-05-08 EP EP24823581.4A patent/EP4729397A1/en active Pending
- 2024-05-08 WO PCT/KR2024/006184 patent/WO2024258060A1/ko not_active Ceased
- 2024-05-08 MX MX2025015051A patent/MX2025015051A/es unknown
- 2024-05-08 CN CN202480037857.2A patent/CN121335832A/zh active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980043143U (ko) | 1996-12-24 | 1998-09-25 | 양재신 | 자동차용 사이드 실의 보강구조 |
| JP2016002781A (ja) * | 2014-06-13 | 2016-01-12 | アイシン高丘株式会社 | 車体部品 |
| US20220281304A1 (en) * | 2019-05-07 | 2022-09-08 | Arcelormittal | Side sill part for an automotive vehicle |
| KR20220048138A (ko) * | 2020-10-12 | 2022-04-19 | 현대자동차주식회사 | 전기 자동차용 스크럼 타입 사이드 실 구조 |
| KR20230071531A (ko) * | 2021-11-16 | 2023-05-23 | 주식회사 포스코 | 차량용 사이드실 |
| KR102492896B1 (ko) * | 2022-07-25 | 2023-01-30 | 쌍용자동차 주식회사 | 프레임 타입 전기차의 배터리 장착 공간 확보 및 측면 충돌 개선 구조 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4729397A1 (en) | 2026-04-22 |
| CN121335832A (zh) | 2026-01-13 |
| KR20240176261A (ko) | 2024-12-24 |
| MX2025015051A (es) | 2026-02-03 |
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