JP2020032955A - Hat-shaped member and method of manufacturing hat-shaped member - Google Patents

Abstract

To provide a hat-shaped member which increases strength against force acting vertically on a top surface part while maintaining bondability with a peripheral member, and a method of manufacturing the hat-shaped member.SOLUTION: A hat-shaped member 1 has a pair of vertical wall parts 10, a top surface part 20, a pair of flange parts 30, and a pair of upper side corner parts 40 connecting the pair of vertical wall parts 10 to the top surface part 20 respectively. The hat-shaped member 1 has a first hat part 100 and a second hat part 200 arranged along a lengthwise direction L. A first top surface part of the first hat part 100 is equal in height to the pair of first upper side corner parts. A second top surface part of the second hat part 200 has a reduced top surface part which extends along a width direction W at a position lower than the pair of upper side corner parts, and an extension part which extends from the pair of upper side corner parts to the reduced top surface part respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hat-shaped member and a method for manufacturing the hat-shaped member.

  Patent Literature 1 discloses a hat-shaped member in which a narrow portion in which a pair of vertical wall portions oppose each other and a wide portion in which a pair of vertical wall portions oppose each other are provided repeatedly in a longitudinal direction. I have. In the longitudinal direction, the opposing interval continuously expands and contracts repeatedly, thereby improving the bending impact characteristics.

JP 2008-189126 A

  The hat-shaped member is generally not used alone, but is joined to a peripheral member and used, for example, as a member for a vehicle. Here, in the hat-shaped member of Patent Literature 1, since the interval between the pair of vertical wall portions repeats expansion and contraction, the surfaces of the vertical wall portions are not parallel. For this reason, the hat-shaped member of Patent Literature 1 has a problem that it is difficult to join with the peripheral member.

  Further, the strength against the force acting in the direction perpendicular to the top surface provided between the pair of vertical walls is not sufficient, and further improvement has been demanded.

  Therefore, it is an object of the present invention to provide a hat-shaped member and a method for manufacturing the hat-shaped member that improve strength against a force acting in a direction perpendicular to the top surface while maintaining the bonding property with the peripheral member.

  The hat-shaped member according to one aspect includes a pair of vertical wall portions, a top surface portion, a pair of flange portions, and a pair of corner portions connected between each of the pair of vertical wall portions and the top surface portion. Have. The hat-shaped member has a first hat portion and a second hat portion arranged along the longitudinal direction. The height of the top surface of the first hat portion is the same as the height of the pair of corners. The top surface portion of the second hat portion has a reduced top surface portion extending in a width direction at a position lower than the pair of corners, and an extension portion extending from each of the pair of corners to the reduced top surface portion. .

  Since the top surface of the second hat portion has an extension extending from each of the pair of corners to a reduced top surface extending in the width direction at a position lower than the corner, from one corner to the other corner The cross-sectional area of the top surface (that is, the total cross-sectional area of the extension and the reduced top surface) increases as compared with the case where the top surface extends in parallel. Thereby, the second moment of area at the top surface of the second hat portion can be improved, and the strength against a force acting in a direction perpendicular to the top surface can be improved.

  On the other hand, since the height of the top surface of the first hat portion is the same as the height of the pair of corners, the peripheral member can be joined from one corner to the other corner over the top surface. Therefore, it is possible to join the hat-shaped member and the peripheral member.

FIG. 1 is a perspective view of a hat-shaped member according to the embodiment. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is a cross-sectional view of the hat-shaped member according to the embodiment. FIG. 5 is a diagram for explaining an example of use of the hat-shaped member according to the embodiment. FIG. 6 is a diagram for explaining a method of manufacturing the hat-shaped member 1 according to the embodiment. FIG. 7 is a diagram for explaining a method of manufacturing the hat-shaped member 1 according to the embodiment.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, parts having different dimensional relationships and ratios between drawings may be included. In the specification and the drawings, elements having substantially the same function and configuration will be denoted by the same reference numerals, and redundant description will be omitted. Elements not directly related to the present invention will be omitted.

(1) Schematic Configuration of Hat-Type Member 1 The schematic configuration of the hat-type member 1 will be described with reference to FIGS. FIG. 1 is a perspective view of a hat-shaped member according to the embodiment. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is a cross-sectional view of the hat-shaped member according to the embodiment. 4A is a cross-sectional view taken along line CC of FIG. 1, and FIG. 4B is a cross-sectional view taken along line DD of FIG. FIG. 5 is a diagram for explaining an example of use of the hat-shaped member according to the embodiment.

  Arrow L shown in the drawing indicates the longitudinal direction, arrow W indicates the width direction, and arrow H indicates the height direction. The longitudinal direction L, the width direction W, and the height direction H are orthogonal to each other.

  As shown in FIG. 1, the hat-shaped member 1 includes a pair of vertical wall portions 10, a top surface portion 20, a pair of flange portions 30, a pair of upper corner portions 40, a pair of lower corner portions 50, Having.

  The pair of vertical wall portions 10 extend in the longitudinal direction L and face each other in the width direction W. The upper edge of the vertical wall portion 10 is continuous with the outer edge of the top surface portion 20 in the width direction W via the upper corner portion 40. The lower edge of the vertical wall portion 10 is continuous with the outer edge of the flange portion 30 in the width direction W via the lower corner portion 50.

  As shown in FIG. 1, the vertical wall section 10 has an upper wall section 12, a lower wall section 14, and an inner section 16.

  The upper wall 12 is located above the lower wall 14. The upper edge of the upper wall portion 12 is continuous with the outer edge of the top surface portion 20 in the width direction W via the upper corner portion 40. The lower edge of the upper wall portion 12 is continuous with the inner portion 16.

  The lower wall portion 14 is located lower than the upper wall portion 12. The upper edge of the lower wall portion 14 is continuous with the inner portion 16. The lower edge of the lower wall portion 14 is connected to the outer edge of the flange portion 30 in the width direction W via the lower corner portion 50.

  The inner portion 16 is located between the upper wall portion 12 and the lower wall portion 14 and is located inside the lower wall portion 14 in the width direction W. The upper edge of the inner portion 16 is continuous with the lower edge of the upper wall portion 12, and the lower edge of the inner portion 16 is continuous with the upper edge of the lower wall portion 14.

  The top surface portion 20 is provided between the pair of vertical wall portions 10 in the width direction W. The top surface portion 20 has a surface parallel to the longitudinal direction L and the width direction W. The outer edge of the top surface portion 20 in the width direction W is continuous with the upper edge of the vertical wall portion 10 via the upper corner portion 40.

  The pair of flange portions 30 are located outside the vertical wall portion 10 in the width direction W. The inner edge of the flange portion 30 in the width direction W is continuous with the lower edge of the vertical wall portion 10 via the lower corner portion 50.

  The pair of upper corner portions 40 connect between each of the pair of vertical wall portions 10 and the top surface portion 20.

  The pair of lower corner portions 50 connect between each of the pair of vertical wall portions 10 and the flange portion 30.

  As shown in FIG. 1, the hat-shaped member 1 has a first hat portion 100 and a second hat portion 200. The first hat part 100 and the second hat part 200 are arranged along the longitudinal direction L.

  As shown in FIG. 2, the first hat portion 100 includes a pair of first vertical wall portions 110, a first top surface portion 120, a pair of first flange portions 130, a pair of first upper corner portions 140, A pair of first lower corners 150. The first vertical wall portion 110 corresponds to the vertical wall portion 10, the first top surface portion 120 corresponds to the top surface portion 20, the first flange portion 130 corresponds to the flange portion 30, and the first upper corner portion 140 Corresponds to the upper corner 40, and the first lower corner 150 corresponds to the lower corner 50.

  The first vertical wall section 110 has a first upper wall section 112 corresponding to the upper wall section 12, a first lower wall section 114 corresponding to the lower wall section 14, and a first inner section 116 corresponding to the inner section 16. .

  The height h11 of the first top surface portion 120 is the same as the height of the pair of first upper corner portions 140. Therefore, the peripheral members can be joined from one first upper corner 140 to the first upper corner 140 from the first top surface 120. Therefore, in the first hat portion 100, the peripheral members can be joined, and the hat-shaped member 1 and the peripheral members can be joined.

  It should be noted that the same height in the present specification is not limited to the case where these heights are exactly the same height, but also includes a case where a height difference occurs due to a manufacturing error or the like. This means that they are arranged at substantially the same height so that the effects of the present invention can be obtained.

  The first inner portion 116 is configured by a recess (bead) that is recessed in the width direction W. Thereby, the rigidity of the first vertical wall portion 110 can be improved.

  The first inner portion 116 is located outside the first upper corner 140 in the width direction W. As a result, as described later, when the hat-shaped member 1 is manufactured, even if a mold to be brought into contact with the top surface section 20 from below is inserted, the mold hits the first inner portion 116 and cannot be inserted. Can be suppressed.

  As shown in FIG. 3, the second hat portion 200 includes a pair of second vertical wall portions 210, a second top surface portion 220, a pair of second flange portions 230, a pair of second upper corner portions 240, A pair of second lower corners 250. The second vertical wall portion 210 corresponds to the vertical wall portion 10, the second top surface portion 220 corresponds to the top surface portion 20, the second flange portion 230 corresponds to the flange portion 30, and the second upper corner portion 240 Corresponds to the upper corner 40, and the second lower corner 250 corresponds to the lower corner 50.

  The second top surface 220 has a reduced top surface 222 and an extension 224. The reduced top surface portion 222 extends in the width direction W at a position lower than the pair of second upper corner portions 240. The extension 224 extends from each of the pair of second upper corners 240 to the reduced top surface 222. Accordingly, the angle θ21 between the second vertical wall 210 and the second top surface 220 at the second upper corner 240 is the angle between the first vertical wall 110 and the first top surface 120 at the first upper corner 140. It becomes smaller than θ11. In this case, in the cross section along the width direction W and the height direction H (FIGS. 2 and 3), the cross-sectional area of the second top surface section 220 is larger than the cross-sectional area of the first top surface section 120. The surface portion 220 has a larger second moment of area than the first top surface portion 120, and the hat-shaped member 1 according to the embodiment can improve the strength with respect to the force F acting on the top surface portion 20 in the vertical direction. The length W23 of the reduced top surface portion 222 in the width direction W is longer than half the length W21 of the second top surface portion 220 in the width direction W. Thereby, the angle θ21 between the second vertical wall portion 210 and the second top surface portion 220 can be reduced. As the angle θ21 is smaller, the cross-sectional area of the second top surface portion 220 increases, so that the second moment of area in the second top surface portion 220 can be increased. Therefore, in the hat-shaped member 1 according to the embodiment, the strength with respect to the force F acting in the direction perpendicular to the top surface portion 20 can be further improved.

  Height h22 of reduced top surface portion 222 is higher than half height h11 of first top surface portion 120 of first hat portion 100. Thereby, it is possible to suppress an unnecessarily large change from the first top surface portion 120 to the reduced top surface portion 222, and a change in bending for connecting the first hat portion 100 and the second hat portion 200 increases. Can be suppressed. For this reason, it is possible to secure strength at a portion (a connecting portion 300 described later) connecting the first hat portion 100 and the second hat portion 200.

  The second vertical wall portion 210 has a second upper wall portion 212 corresponding to the upper wall portion 12, a second lower wall portion 214 corresponding to the lower wall portion 14, and a second inner portion 216 corresponding to the inner portion 16. . The second inner portion 216 is configured by a flat surface (flat portion) extending in the width direction W. Thereby, the rigidity of the second vertical wall portion 210 can be improved.

  As described above, the second top surface portion 220 is provided with a step by the reduced top surface portion 222 and the extension portion 224, and the second vertical wall portion 210 is provided with the step by the second inner portion 216, whereby the second The rigidity of the hat portion 200 can be improved, and cross-sectional collapse of the hat-shaped member 1 can be suppressed.

  The first inner part 116 and the second inner part 216 may be located at the same height. Therefore, the height h12 of the first inner portion 116 and the height h23 of the second inner portion 216 may be the same. The height h12 of the first inner portion 116 is a length from the first lower corner 150 to the lower edge of the first inner portion 116 in the height direction H. The height h12 of the second inner portion 216 is a length from the second lower corner 250 to the lower edge of the second inner portion 216 in the height direction H. As described above, when the first inner portion 116 and the second inner portion 216 have the same height, when the hat-shaped member 1 is manufactured, the first inner portion 116 and the second inner portion 216 are simultaneously recessed ( Bead) can be formed. Thereby, when the 2nd inside part 216 is a crevice, hat-shaped member 1 can be manufactured by the same number of steps as a conventional process. Moreover, the case where the 2nd inside part 216 is a plane part may be sufficient. The hat-shaped member 1 can be manufactured in the same number of steps as in the related art by forming a concave portion as the second inner portion 216 and forming the second inner portion 216 from the concave portion to a flat portion in another process thereafter. it can.

  In addition, since the first inner portion 116 is configured by the concave portion, the surface along the first lower wall portion 114 may be located on an extension of the surface along the first upper wall portion 112. On the other hand, since the second inner portion 216 is constituted by a flat portion, the surface along the first lower wall portion 114 may be shifted from an extension of the surface along the first upper wall portion 112.

  Further, since the first inner portion 116 is formed by a concave portion, the innermost edge of the first inner portion 116 in the width direction W does not need to be continuous with the lower edge of the first upper wall portion 112. On the other hand, since the second inner portion 216 is formed of a flat portion, the innermost edge of the second inner portion 216 in the width direction W is continuous with the lower edge of the second upper wall portion 212.

  Further, the hat-shaped member 1 has a connecting portion 300. The connecting portion 300 is arranged between the first hat portion 100 and the second hat portion 200, and connects the first hat portion 100 and the second hat portion 200.

  As shown in FIGS. 1 and 4, the connecting portion 300 is inclined with respect to the cross section CS along the width direction W and the height direction H. Thereby, it is possible to continuously change the shape of the first hat portion 100 to the shape of the second hat portion 200. Therefore, compared to the case where the connecting portion 300 is parallel to the cross section CS, it is possible to suppress the concentration of the stress input from the outside to the connecting portion 300, and it is possible to suppress the damage based on the connecting portion 300. Further, the shape of the first hat 100 can be continuously changed from the shape of the second hat 200 to the shape of the second hat 200, and the rapid change from the shape of the first hat 100 to the shape of the second hat 200 can be suppressed. For this reason, it is possible to manufacture the hat-shaped member 1 even if a material having a low elongation such as ultra high tensile strength is used. Further, when the shape of the first hat portion 100 is suddenly changed to the shape of the second hat portion 200, an excessive load is applied to a mold for molding the hat-shaped member 1 in this portion. However, since the connecting portion 300 is inclined with respect to the cross-section CS, the change from the shape of the first hat portion 100 to the shape of the second hat portion 200 can be moderated, and an excessive load is applied to the mold. Can be suppressed, and the life of the mold can be prolonged.

  As shown in FIG. 4A, the top surface portion 20 of the connecting portion 300 is inclined with respect to the cross section CS. Therefore, the angle θ31 between the top surface portion 20 and the cross section CS in the connecting portion 300 is less than 90 degrees.

  As shown in FIG. 4B, the vertical wall portion 10 (specifically, the upper wall portion 12) of the connecting portion 300 is inclined with respect to the cross section CS. Therefore, the angle θ32 between the upper wall portion 12 and the cross section CS in the connecting portion 300 is less than 90 degrees.

  As shown in FIG. 5, the hat-shaped member 1 is, for example, a hat-shaped member 1 for a vehicle. The hat-shaped member 1 is used as a side sill strength, and a biller as the peripheral member 400 can be joined to the hat-shaped member 1. Here, the first top surface portion 120 of the first hat portion 100 is a flat surface without the reduced top surface portion 222, so that the peripheral member 400 can be joined by spot welding. On the other hand, since the second hat portion 200 to which the peripheral member 400 is not joined has high rigidity, the maximum bending load at the time of a vehicle collision can be increased.

  Although FIG. 5 illustrates the hat-shaped member 1 having no inside portion 16, the hat-shaped member 1 for a vehicle may of course have the inside portion 16.

(2) Manufacturing method of hat-shaped member Next, regarding the manufacturing method of the hat-shaped member, FIGS. 6 and 7 are used to describe the manufacturing method of the hat-shaped member 1 according to the embodiment with reference to FIGS. 6 and 7. FIG. The right side of FIG. 6 shows the first hat portion 100, and the left side of FIG. 6 shows the second hat portion 200. FIG. 7A is a diagram for explaining an example of the manufacturing process in step S20. FIG. 7B is a diagram illustrating an example of the manufacturing process in step S30.

  In step S10 in FIG. 6, a flat metal plate is bent using a mold, so that a pair of vertical wall portions 10, a top surface portion 20, a pair of flange portions 30, a first inner portion 116, a first 2 and the inner part 216 are molded. Thereby, the first hat part 100 and the second hat part 200 can be formed.

  The second inner portion 216 is formed into a concave portion that is recessed in the width direction W, similarly to the first inner portion 116. Thereby, the first inner part 116 and the second inner part 216 can be formed in the same step.

  Note that the pair of vertical wall portions 10, the top surface portion 20, the pair of flange portions 30, the first inner portion 116, and the second inner portion 216 may be molded at the same time.

  In step S20, the angle between the vertical wall portion 10 and the flange portion 30 and the angle between the vertical wall portion 10 and the top surface portion 20 are adjusted.

  In step S20, for example, the angle between the top surface portion 20 and the vertical wall portion 10 in the first hat portion 100 can be adjusted using a mold as shown in FIG. 7A.

  The angle between the vertical wall portion 10 and the flange portion 30 and the angle between the vertical wall portion 10 and the top surface portion 20 may be simultaneously adjusted.

  In step S30, the upper corner portion 40, the second inner portion 216, and the lower corner portion 50 between the vertical wall portion 10 and the flange portion 30 are subjected to re-pressing.

  Here, the second inner portion 216 can be formed into a flat surface from the concave portion. Thereby, when re-pressing is performed on another portion, the hat-shaped member 1 can be manufactured in the same number of steps as in the related art by forming the second inner portion 216 from the concave portion into a flat surface. .

  In step S30, for example, re-pressing can be performed using a mold as shown in FIG. 7B.

  In addition, you may perform re-pressing simultaneously with respect to the upper corner part 40, the 2nd inside part 216, and the lower corner part 50 which is the part between the vertical wall part 10 and the flange part 30.

  As described above, according to the manufacturing method according to the present embodiment, the hat-shaped member 1 can be manufactured with the same number of steps as in the related art. Thereby, the hat-shaped member 1 with improved strength can be manufactured without increasing the manufacturing cost.

  Although the present invention has been described in detail using the above embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be embodied as modified and changed aspects without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description in this specification is for the purpose of illustrative explanation, and has no restrictive meaning to the present invention.

  According to this aspect, it is possible to provide a hat-shaped member and a method of manufacturing the hat-shaped member that improve the strength against a force acting in a direction perpendicular to the top surface while maintaining the bonding property with the peripheral member.

1: hat-shaped member 10: vertical wall portion 12: upper wall portion 14: lower wall portion 16: inner portion 20: top surface portion 30: flange portion 40: upper corner portion 50: lower corner portion 100: first hat portion 110 : First vertical wall portion 112: first upper wall portion 114: first lower wall portion 116: first inner portion 120: first top surface portion 130: first flange portion 140: first upper corner portion 150: first lower portion. Side corner portion 200: second hat portion 210: second vertical wall portion 212: second upper wall portion 214: second lower wall portion 216: second inner portion 220: second top surface portion 222: reduced top surface portion 224: extension Part 230: second flange part 240: second upper corner part 250: second lower corner part 300: connecting part 400: peripheral member CS: cross section

Claims (8)

A hat-shaped member having a pair of vertical wall portions, a top surface portion, a pair of flange portions, and a pair of corner portions connecting between each of the pair of vertical wall portions and the top surface portion,
It has a first hat portion and a second hat portion arranged along the longitudinal direction,
The height of the top surface of the first hat portion is the same as the height of the pair of corners,
The top surface portion of the second hat portion has a reduced top surface portion extending in a width direction at a position lower than the pair of corners, and an extension portion extending from each of the pair of corners to the reduced top surface portion. , Hat-shaped members. The vertical wall portion of the first hat portion includes a first upper wall portion, a first lower wall portion located below the first upper wall portion, the first upper wall portion, and the first lower wall portion. A first inner portion located between the first lower wall portion and the first lower wall portion, the first inner portion being located between the first lower wall portion and the first lower wall portion.
The vertical wall portion of the second hat portion includes a second upper wall portion, a second lower wall portion located below the second upper wall portion, the second upper wall portion, and the second lower wall portion. A second inner portion located between the first lower wall portion and the second lower wall portion in the width direction.
The hat-shaped member according to claim 1, wherein the first inner portion and the second inner portion are located at the same height. The first inner portion is configured by a concave portion that is concave in the width direction,
The hat-shaped member according to claim 2, wherein the second inner portion is configured by a plane extending in the width direction.   4. The hat-shaped member according to claim 2, wherein the first inner portion is located outside the corner of the first hat portion in a width direction. 5. In the longitudinal direction, between the first hat portion and the second hat portion, a connecting portion that connects the first hat portion and the second hat portion,
The hat-shaped member according to any one of claims 1 to 4, wherein the connecting portion is inclined with respect to a cross section along the width direction and the height direction.   The hat-shaped member according to any one of claims 1 to 5, wherein a length of the reduced top surface in the width direction is longer than a half of a length of the second hat portion in the width direction of the top surface.   The hat-shaped member according to any one of claims 1 to 6, wherein a height of the reduced top surface portion is higher than half a height of the top surface portion of the first hat portion. A hat-shaped member manufacturing method, comprising: a pair of vertical wall portions, a top surface portion, a pair of flange portions, and a pair of corner portions connecting between the top surface portion and each of the pair of vertical wall portions. hand,
It has a first hat portion and a second hat portion arranged along the longitudinal direction,
The height of the top surface of the first hat portion is the same as the height of the pair of corners,
The top surface of the second hat portion has a reduced top surface extending in a width direction at a position lower than the pair of corners, and an extension extending from each of the pair of corners to the reduced top surface. And
The vertical wall portion of the first hat portion includes a first upper wall portion, a first lower wall portion located below the first upper wall portion, the first upper wall portion, and the first lower wall portion. A first inner portion located between the first lower wall portion and the first lower wall portion, the first inner portion being located between the first lower wall portion and the first lower wall portion.
The vertical wall portion of the second hat portion includes a second upper wall portion, a second lower wall portion located below the second upper wall portion, the second upper wall portion, and the second lower wall portion. A second inner portion located between the first lower wall portion and the second lower wall portion in the width direction.
The first inner portion and the second inner portion are located at the same height,
The first inner portion is configured by a concave portion that is concave in the width direction,
The second inner portion is configured by a plane extending in the width direction,
A first step of forming the pair of vertical wall portions, the top surface portion, the pair of flange portions, the first inside portion, and the second inside portion by bending a metal plate;
A second step of adjusting an angle between the vertical wall portion and the flange portion, and an angle between the vertical wall portion and the top surface portion;
A third step of re-pressing the corner portion, the second inner portion, and a portion between the vertical wall portion and the flange portion,
In the first step, the second inner end is molded into a concave portion that is concave in the width direction,
In the third step, a method of manufacturing a hat-shaped member in which the second inner end is molded from the concave portion to the flat surface.

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