WO2015053125A1 - 自動車車体用構造部材 - Google Patents
自動車車体用構造部材 Download PDFInfo
- Publication number
- WO2015053125A1 WO2015053125A1 PCT/JP2014/075975 JP2014075975W WO2015053125A1 WO 2015053125 A1 WO2015053125 A1 WO 2015053125A1 JP 2014075975 W JP2014075975 W JP 2014075975W WO 2015053125 A1 WO2015053125 A1 WO 2015053125A1
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- WO
- WIPO (PCT)
- Prior art keywords
- structural member
- groove
- ridge line
- steel plate
- automobile body
- Prior art date
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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
- B62D25/20—Floors or bottom sub-units
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- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- 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
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- 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
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/055—Padded or energy-absorbing fittings, e.g. seat belt anchors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D23/00—Combined superstructure and frame, i.e. monocoque constructions
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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
-
- 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
- B62D27/00—Connections between superstructure or understructure sub-units
- B62D27/02—Connections between superstructure or understructure sub-units rigid
- B62D27/026—Connections by glue bonding
-
- 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
Definitions
- FIG. 24 shows a state in which a structural member having a substantially groove-shaped cross section in which a groove is formed on the top plate receives a collision load in the axial direction and is deformed.
- FIG. 24 shows how the structural member is deformed for each deformation stroke.
- such a structural member has a groove on the top plate, but does not have an outward flange in a range along the ridge line at the end in the longitudinal direction.
- the lower shape rigidity that is, the substantially groove is relatively low.
- the structural member bends toward the opening side of the cross section of the mold. When the structural member is bent, the effect of increasing the absorbed energy is not seen.
- a top plate portion a ridge line portion continuous with the top plate portion, and a vertical wall portion continuous with the ridge line portion.
- a structural member for an automobile body made of a steel plate press-formed body in which a cross section intersecting the predetermined direction forms a substantially groove-shaped cross section, at least one formed on the top plate portion so as to extend in the predetermined direction.
- Two groove portions and an outward flange formed at least in the range of the ridge line portion at the end portion in the predetermined direction, and the depth of the groove portion is set according to the width of the groove portion and the plate thickness of the steel plate
- the steel plate may be a high-tensile steel plate having a tensile strength of 390 MPa or more.
- the steel plate may be a high-tensile steel plate having a tensile strength of 590 MPa or more.
- an end flange in the predetermined direction may have an outward flange in the range of the groove.
- the structural member has the outward flange at least at the end of the ridge line portion, so that the absorbed energy at the initial stage of the collision is improved.
- the structural member since the structural member has a groove portion in the top plate portion, and further has an outward flange at least at the end portion of the ridgeline portion, bending of the structural member after the middle stage of the collision is suppressed, and the groove portion is provided. Absorption energy effect is effectively exhibited.
- the structural member according to the present invention has the outward flange at least at the end of the ridge line portion, whereby the groove portion can be provided with an effective depth corresponding to the width and thickness of the groove portion. Therefore, even when press-forming a high-strength steel sheet that is relatively difficult to press form, it becomes easy to form a groove portion with a desired depth that can improve the energy absorption efficiency, and has excellent load transfer characteristics and rigidity. A structural member is obtained with a high yield.
- FIG. 1 is a perspective view showing the shape of a structural member according to an embodiment of the present invention.
- FIG. 2A is a diagram in which the structural member according to the present embodiment is viewed in the axial direction
- FIG. 2B is a diagram illustrating another configuration example of the structural member.
- FIG. 3 is a cross-sectional view showing a press molding apparatus for manufacturing a structural member.
- 4A is a perspective view showing a die
- FIG. 4B is a perspective view showing a ridge line pad
- FIG. 4C is a perspective view showing a punch.
- FIG. 5A is a cross-sectional view showing a press forming apparatus provided with a conventional pad
- FIG. 5B is an explanatory view showing a state in which a forming material is restrained by the conventional pad.
- FIG. 6 is an explanatory view showing a state in which the molding material is restrained by the ridge line pad.
- FIG. 7A is an overall plan view showing the shape of the development blank used in Analysis 1
- FIG. 7B is an enlarged plan view of the end in the longitudinal direction of the development blank.
- FIGS. 8A and 8B are a plan view of the structural member used in Analysis 1 and a view as seen from the upper side in the axial direction.
- FIG. 9 is an explanatory diagram showing the dimensions of the structural member used in Analysis 1.
- FIG. FIG. 10 is a perspective view showing the press forming apparatus used in the first press forming in Analysis 1.
- FIG. FIG. 10 is a perspective view showing the press forming apparatus used in the first press forming in Analysis 1.
- FIG. 11 is an explanatory view showing the first press forming in the analysis 1.
- FIG. FIG. 12 is a perspective view showing a press forming apparatus used in the second press forming in Analysis 1.
- FIG. 13 is an explanatory diagram showing the second press forming in Analysis 1.
- FIG. 14 (a) to 14 (b) show the maximum value of the plate thickness reduction rate near the edge of the ridge line flange and the minimum plate thickness reduction rate near the root of the ridge line flange in the intermediate molded body and the structural member, respectively. It is explanatory drawing which shows a value.
- FIG. 15A is a front view showing an analysis model of the structural member according to the present embodiment used in Analysis 2
- FIG. 15B is a front view showing an analysis model of Comparative Example 1.
- FIG. 15 (c) is a front view showing an analysis model of Comparative Example 2.
- FIG. It is a side view showing the shape of each analysis model used in analysis 2.
- FIG. 17 is a graph showing the axial load-stroke characteristics obtained in Analysis 2.
- FIG. 18 is a graph showing the energy absorption amount-stroke characteristic obtained in Analysis 2.
- 19A is a graph showing the energy absorption amount-stroke characteristic of the analysis model of Comparative Example 2 obtained by using the steel plate 340HR in Analysis 3
- FIG. 19B is the graph showing the steel plate 340HR in Analysis 3.
- FIG. It is a graph which shows the energy absorption amount-stroke characteristic of the analytical model of the structural member concerning this embodiment obtained by using.
- FIG. 20 is a graph showing the energy absorption amount-groove depth characteristics obtained by analysis 3 using the steel plate 340HR.
- FIG. 21A is a graph showing the energy absorption amount-stroke characteristic of the analysis model of Comparative Example 2 obtained by using the steel plate 980Y in Analysis 3, and FIG. 21B shows the steel plate 980Y in Analysis 3. It is a graph which shows the energy absorption amount-stroke characteristic of the analytical model of the structural member concerning this embodiment obtained by using.
- FIG. 22 is a graph showing energy absorption amount-groove depth characteristics obtained by using the steel plate 980Y in analysis 3.
- FIG. 23 is a graph showing the dimensionless value of the energy absorption amount-groove depth characteristic obtained in Analysis 3.
- FIGS. 24A to 24E are explanatory diagrams showing how the analysis model of Comparative Example 2 is deformed. 25 (a) to 25 (e) are explanatory views showing the deformation of the structural member analysis model according to the present embodiment.
- FIG. 1 is an explanatory diagram showing an example of a structural member (first member) 2 for an automobile body according to the present embodiment.
- Fig.2 (a) is the figure which looked at the structural member (1st member) 2 concerning this embodiment to the axial direction, Comprising: The A arrow directional view of FIG. 1 is shown.
- the first member 2 shown in FIG. 1 can be used as a member constituting the joining structure 1 of the body shell of an automobile.
- the joint structure 1 include a floor cross member, a side sill, a front side member, and a floor tunnel brace.
- a high-strength steel plate having a tensile strength of preferably 590 MPa or more, more preferably 780 MPa or more is used as a forming material.
- the first member 2 includes a top plate portion 4, ridge line portions 4a and 4b continuous to the top plate portion 4, vertical wall portions 5a and 5b continuous to the ridge line portions 4a and 4b, and vertical wall portions 5a and 5b. It has a substantially hat-shaped cross-sectional shape having continuous curved portions 6a and 6b and flange portions 7a and 7b continuous to the curved portions 6a and 6b.
- the substantially hat-shaped cross-sectional shape is an embodiment of the substantially groove-shaped cross-sectional shape.
- the structural member (first member) 2 according to the present embodiment has at least a substantially groove-shaped cross-sectional shape having a top plate portion 4, ridge line portions 4a and 4b, and vertical wall portions 5a and 5b.
- the curved portions 6a and 6b and the flange portions 7a and 7b may be omitted.
- a U-shaped cross-sectional shape is also included in the substantially groove-shaped cross-sectional shape.
- Outward continuous flanges 9a and 9b are formed on the outer periphery of the end portion in the axial direction of the first member 2 in a range along the top plate portion 4, the ridge line portions 4a and 4b, and the vertical wall portions 5a and 5b. .
- the outward continuous flanges 9a and 9b are cut continuously formed in a range along a part of the top plate part 4 excluding a range along the groove part 8 and the ridge line parts 4a and 4b and the vertical wall parts 5a and 5b. It is an outward flange without a notch.
- the 1st member 2 is a ridgeline part flange at least in the range along the ridgeline part 4a, 4b. This is a member having 50a and 50b.
- the first member 2 When the first member 2 has the outward continuous flanges 9 a and 9 b, the ridge lines 4 a and 4 b that bear the load in the axial direction continue to the joint surface with the second member 3. For this reason, in the initial stage of collision (for example, the deformation stroke amount is 0 to 40 mm) when the collision load is received in the axial direction, the load applied to the ridge lines 4a and 4b becomes large. Therefore, the first member 2 is advantageous in load transmission characteristics.
- the width of the outward continuous flanges 9a and 9b may be at least 1 mm in order to exhibit the effect of improving the energy absorption efficiency by forming the groove 8 described later.
- the width of the outward continuous flanges 9a and 9b is preferably 3 mm or more from the viewpoint of securing a welding allowance such as laser welding or arc fillet welding, and 10 mm from the viewpoint of securing a welding allowance for spot welding. The above is preferable.
- the width of the outward continuous flanges 9a and 9b may not be constant over the entire region. In consideration of press formability, for example, the widths of the ridge line flanges 50a and 50b may be smaller than the widths of the outward flanges of other portions.
- the widths of the outward continuous flanges 9a and 9b can be adjusted by adjusting the shape of a blank (deployment blank) in which the first member 2 is flattened.
- a flange obtained by bending an end of a press-formed body having a substantially groove-shaped cross section to the outside of the groove shape is referred to as an “outward flange”.
- the flange formed along the range of the ridgeline part of the edge part of a press molding is called “ridgeline part flange.”
- the outward flange formed continuously over the ridge line portion and at least a part of each of the groove bottom portion and the vertical wall portion in the end portion of the press-formed body is referred to as an “outward continuous flange”.
- “providing a notch in the flange” means that the notch is provided over the entire width direction of the flange and the flange becomes discontinuous.
- the flange width is used in the same meaning as the height of the flange. Therefore, when the flange width is partially reduced and a part of the flange is left, the flange is not provided with a notch.
- the “flange width” is a flat surface that does not include a rising curved surface that connects the top plate portion 4, the ridge line portions 4a and 4b, the vertical wall portions 5a and 5b, and the outward continuous flanges 9a and 9b. Refers to the rising dimension of the part.
- the first member 2 includes the outer periphery of the end portion in the axial direction, that is, a part of the top plate portion 4 excluding the range of the groove portion 8, the ridge line portions 4a and 4b, and the vertical wall portion.
- Outward continuous flanges 9a and 9b are provided in a range along 5a and 5b.
- the 1st member 2 should just have ridgeline part flange 50a, 50b in the range which follows at least ridgeline part 4a, 4b.
- the outward flange made into the ridgeline part flanges 50a and 50b through the notch formed in the range along the top-plate part 4 and the vertical wall parts 5a and 5b may be provided.
- the above formula (2) is the energy per unit area in the cross section of the first member 2.
- the groove depth H 0 where the absorption amount (kJ / mm 2 ) shows a value near the maximum value is shown.
- the cross section of the 1st member 2 here is a cross section of the edge part of the 1st member 2, Comprising: The top-plate part along the boundary part with the standing-up curved surface connected to outward continuous flange 9a, 9b 4, the ridgeline parts 4a and 4b and the cross section of the edge part of the vertical wall parts 5a and 5b are pointed out.
- the press molding apparatus 10 includes a punch 11, a die 12, and a pad 13 that presses the molding material 14 against the punch 11 to restrain the molding material 14.
- the punch 11 has a groove forming portion 11b formed in the upper surface 11a and extending in the longitudinal direction, and a side wall 11c formed at an end portion in the longitudinal direction.
- the rising angle ⁇ of the side wall 11c is, for example, 50 to 90 °.
- the ridge line pad 13 suppresses the movement of the surrounding steel plate material by projecting the steel plate material at the end of the portion formed in the ridge line portions 4a and 4b and forming the end portion of the ridge line portions 4a and 4b. It is aimed at effect. Therefore, in the vicinity of the portion formed on the outward continuous flanges 9a and 9b, the range of the portion formed on the ridge line portions 4a and 4b restrained by the ridge line pad 13 is at least the ridge line portions 4a and 4b and the top plate portion 4. It is preferable to set it as the part of 1/3 or more of the cross-sectional peripheral length of ridgeline part 4a, 4b from the boundary part.
- the axial range constrained by the ridge line pad 13 among the parts formed on the ridge line portions 4a and 4b is the axis from the root of the outward continuous flanges 9a and 9b.
- it can be, for example, 5 to 100 mm. If the restraining range is less than 5 mm, it is difficult to obtain a deformation suppressing effect during press forming, or the steel sheet may be damaged.
- the part formed in ridgeline part 4a, 4b may be restrained over an axial direction full length, when said restraint range exceeds 100 mm, the required load for pressing the molding raw material 14 with the ridgeline pad 13 May increase.
- the first press molding is performed by the die 12 and the punch 11 in a state where the molding material 14 is restrained by the ridge line pad 13 and the punch 11.
- the reduction in the plate thickness or the increase in the plate thickness which causes cracks in the edges of the ridge line flanges 50a and 50b and wrinkles near the roots of the ridge line flanges 50a and 50b, are suppressed.
- an intermediate molded body having a substantially groove-shaped cross section having ridge line portions 4a, 4b, vertical wall portions 5a, 5b, and a top plate portion 4 having a groove portion 8 extending in the longitudinal direction. can get.
- the outward continuous flanges 9a and 9b may not be raised to the final product angle by the first press molding.
- the outward continuous flanges 9a and 9b are raised to a predetermined degree, for example, 60 ° by the first press molding, and are raised to the angle of the final product by the second or subsequent press molding. May be.
- the groove portion 8 is formed in the top plate portion 4 by the ridge line pad 13 in the first press molding, but the groove portion 8 may be formed by the die 12. Moreover, although this embodiment demonstrated the example in which the groove part 8 was formed in the top-plate part 4 in 1st press molding, the groove part 8 may be formed in 2nd press molding.
- the edge of the ridge line flanges 50a and 50b can be broken.
- the structural member 2 in which wrinkles near the roots of the ridge line flanges 50a and 50b are suppressed is formed.
- the structural member in which the outward flange was formed also in the range in alignment with the groove part 8 in the edge part of a longitudinal direction can be manufactured in the following procedures, for example. That is, in the first stage, an outward continuous flange including an outward flange formed along the entire range of the top plate portion is provided using a pad having the ridge line pressing portion 13c but not having the protrusion 13a. An intermediate molded body is formed. Thereafter, in the second stage, the intermediate molded body is press-molded by using a pad or a punch having a protruding portion 13 a for forming the groove portion 8, and the groove portion 8 is formed in the top plate portion 4. Thereby, the structural member which has an outward flange also in the range of the groove part 8 is obtained.
- the structural member according to the present embodiment absorbs even when the depth of the groove 8 is relatively small by forming the outward continuous flanges 9a and 9b in the range of the ridges 4a and 4b. Energy efficiency is improved. Therefore, a desired outward flange is also provided in a range along the groove portion 8 with respect to the structural member by press forming in the second stage.
- FIG. 8 and 9 show a structural member (first member) 2 formed from the molding material 14 shown in FIG.
- FIG. 8A is a top view of the structural member 2 viewed from the top plate portion 4 side
- FIG. 8B is a schematic view of the structural member 2 viewed obliquely from above in the longitudinal direction.
- FIG. 9 is a cross-sectional view of the structural member 2.
- the height of the structural member 2 is 100 mm
- the cross-sectional curvature radii of the ridge lines 4a and 4b are 12 mm
- the depth of the groove 8 is 7.5 mm.
- Other dimensional specifications are as shown in FIGS.
- FIGS. 14 (a) to 14 (b) are analysis results of plate thickness reduction rates in the vicinity of the edges and roots of the obtained ridges 50a and 50b of the intermediate molded body 40 and the structural member 2, respectively.
- FIG. 14 the maximum value of the plate thickness reduction rate in the vicinity of the portion A near the edge of the ridge line flanges 50a and 50b, and the vicinity of the portion B near the base of the ridge line flanges 50a and 50b where wrinkles are likely to occur.
- the minimum value of the plate thickness reduction rate is shown. When the plate thickness decrease rate is negative, it means the plate thickness increase rate.
- the plate thickness increase rate in the vicinity of the roots of the ridge line flanges 50a and 50b (part B), which is a portion where wrinkles are likely to occur is that the first press molding and the second press molding proceed. Therefore, it increases.
- the plate thickness increase rate in the vicinity of the roots of the ridge line flanges 50 a and 50 b (part B), which is a portion where wrinkles are likely to occur is about 12%, and the generation of wrinkles is also suppressed. .
- the groove portion is not provided in the top plate portion 4 of the first member 2, and the notch 55 is provided in the outward flange at the longitudinal ends of the ridge line portions 4a and 4b.
- the shape is the same as that of the analysis model 30 of the structural member 2 according to the example except that the shape is the same.
- the analysis model 32 of the comparative example 2 is an analysis of the structural member 2 according to the embodiment, except that the notch 55 is provided in the outward flange at the longitudinal ends of the ridge portions 4a and 4b. Same as model 30.
- the analysis model 32 of the comparative example 2 has a deformation stroke of 100 mm when the depth h of the groove 8 is small.
- the absorbed energy efficiency (%) at that time has not increased.
- the analysis model 32 of the comparative example 2 is a case where the depth h of the groove part 8 is enlarged, the raise effect of absorption energy efficiency does not increase remarkably.
- the analysis model 32 of Comparative Example 2 does not have the ridge line flanges 50a and 50b, the ridge line part around the groove part 8 is strongly stretched in the middle of the collision when the deformation stroke exceeds 40 mm. In this case, the end portion is loosened and the structural member is bent.
Abstract
Description
0.2×H0≦h≦3.0×H0
ただし、H0=(0.037t-0.25)×w-5.7t+29.2
(1-1.構成例)
図1は、本実施形態にかかる自動車車体用の構造部材(第1の部材)2の一例を示す説明図である。また、図2(a)は、本実施形態にかかる構造部材(第1の部材)2を軸方向に見た図であって、図1のA矢視図を示している。
0.2×H0≦h≦3.0×H0 … (1)
H0=(0.037t-0.25)×w-5.7t+29.2 … (2)
次に、本実施形態にかかる自動車車体用の構造部材(第1の部材)2の製造方法の一例について説明する。本実施形態にかかる構造部材2は、例えば板厚が0.5~6.0mmの範囲内であり、引張強度が390MPa以上の高張力鋼板をプレス成形して製造されるものであるため、一般的には、しわや割れ等の成形不良を生じやすい。
図3及び図4は、構造部材2の製造に用いられるプレス成形装置10を示す説明図である。図3は、プレス成形装置10のうち、成形する構造部材2の端部に相当する部分の断面図である。図4(a)は、ダイ12を示す斜視図であり、図4(b)はパッド13を示す斜視図であり、図4(c)はパンチ11を示す斜視図である。図4(a)~(c)は、それぞれ、ダイ12、パッド13及びパンチ11を左斜め上側から視た斜視図であり、紙面の奥側が、外向き連続フランジ9a,9bを成形する部分である。
次に、図3及び図4と併せて、図6を参照しながら、プレス成形装置10を用いた構造部材2の製造方法について説明する。図6は、稜線パッド13により成形素材14が拘束された様子を示す斜視図である。
まず、解析1では、実施例にかかる構造部材2における稜線部フランジ50a,50bのエッジ及び根元付近における板厚減少率(板厚増加率)を評価した。図7は解析1で用いた構造部材2の成形素材14としての展開ブランクの形状を示す平面図である。図7(a)は、成形素材14の長手方向の端部を含む全体平面図であり、図7(b)は、長手方向端部の拡大平面図である。
次に、解析2では、稜線部フランジを含む外向き連続フランジ9a,9bと、天板部4の溝部8とをともに備える、実施例にかかる構造部材2の吸収エネルギー効率を評価した。解析2では、構造部材(第1の部材)2を第2の部材3に対してスポット溶接によって接合した接合構造体1(図1を参照)を想定し、構造部材2を、その長手方向に沿って第2の部材3側から押し込んだときの軸方向荷重及びエネルギー吸収量を評価した。解析2では、変形抑止の観点から衝突安全性能を評価するため、変形ストロークは、衝突初期である40mmまでとした。
次に、解析3では、実施例にかかる構造部材2の衝突中期以降までの吸収エネルギー効率を評価した。解析3では、解析2で使用した解析モデルのうち、図15(a)に示す実施例にかかる構造部材2の解析モデル30と、図15(c)に示す比較例2にかかる解析モデル32とを使用した。すなわち、二つの解析モデル30,32の形状の違いは、外向きフランジにおける切欠き55の有無のみである。クロージングプレート45が接合されている点も含め、解析モデル30,32の基本的な形状、構成は解析2の場合と同じである。
2 構造部材(第1の部材)
3 第2の部材
4 天板部
4a,4b 稜線部
5a,5b 縦壁部
6a,6b 曲線部
7a,7b フランジ部
8 溝部
9a,9b,9c 外向き連続フランジ
10 プレス成形装置
11 パンチ
11b 溝成形部
12 ダイ
13 パッド(稜線パッド)
13a 突起部
13b 天板押さえ部
13c 稜線押さえ部
14 成形素材
15 従来のパッド
20 プレス成形装置
30,31,32 解析モデル
40 中間成形体
45 クロージングプレート
50a,50b 稜線部フランジ
50c 外向きフランジ(溝底フランジ)
55 切欠き
h 溝部の深さ
w 溝部の幅
Claims (8)
- 所定方向に延びて形成され、天板部、前記天板部に連続する稜線部及び前記稜線部に連続する縦壁部を有し、前記所定方向に対して交差する断面が略溝型断面を成す、鋼板製のプレス成形体からなる自動車車体用構造部材において、
前記天板部に前記所定方向に延びて形成された少なくとも一つの溝部と、
前記所定方向の端部における少なくとも前記稜線部の範囲に形成された外向きフランジと、を備え、
前記溝部の深さを、前記溝部の幅及び前記鋼板の板厚に応じて設定した、自動車車体用構造部材。 - 前記所定方向の端部における、前記溝部の深さ(h)と、前記溝部の幅(w)と、前記鋼板の板厚(t)と、が以下の関係を充足する、請求項1に記載の自動車車体用構造部材。
0.2×H0≦h≦3.0×H0
ただし、H0=(0.037t-0.25)×w-5.7t+29.2 - 前記鋼板が、引張強度が390MPa以上の高張力鋼板である、請求項1又は2に記載の自動車車体用構造部材。
- 前記鋼板が、引張強度が590MPa以上の高張力鋼板である、請求項1又は2に記載の自動車車体用構造部材。
- 前記鋼板が、引張強度が980MPa以上の高張力鋼板である、請求項1又は2に記載の自動車車体用構造部材。
- 前記外向きフランジが、前記所定方向の端部において、前記稜線部と、前記天板部及び前記縦壁部のそれぞれ少なくとも一部と、に亘る範囲に連続して形成された外向き連続フランジである、請求項1~5のいずれか1項に記載の自動車車体用構造部材。
- 前記所定方向の端部において、前記溝部の範囲に外向きフランジを有する、請求項1~6のいずれか1項に記載の自動車車体用構造部材。
- 前記自動車車体用構造部材は、前記外向きフランジを介して、抵抗スポット溶接、レーザ貫通溶接、隅肉アーク溶接又は接着剤による接着、あるいはこれらの併用した接合により、他の部材に接合される、請求項1~7のいずれか1項に記載の自動車車体用構造部材。
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EP3037327B1 (en) | 2019-01-09 |
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US20160280282A1 (en) | 2016-09-29 |
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