JPH09216018A - Hollow extruded shapes for bending - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute bending work for making a flange piece the outside without deforming the flange part by connecting a reinforcing piece which is extended from a position except the flange piece extending part of hollow extruded shapes for bending to the flange piece. SOLUTION: The extruded shapes 1 have a hollow cross section and made into an unequal-sided hexagon. A 1st flange piece 3 which is obliquely upward extended from the 1st corner part (flange piece extending part) 2a of the main body 2 of the shapes and the 2nd flange piece 4 which is extended from the 5th corner part 2c and becomes a drip flange are provided. Furthermore, the reinforcing piece 5 which is extended from the 2nd corner part 2b of the main body 2 of the shapes toward the 1st flange piece 3 is provided. This reinforcing piece 5 is connected to the 1st flange piece 3 in the position where is slightly on the side of the base end from the tip part 3a of the 1st flange piece 3. When this shape 1 is bent putting the 1st flange piece 3 on the outside, the 2nd flange piece 4 is abutted on a bending die D and the 1st flange piece 3 is restrained with the reinforcing piece 5, so the shapes are bent without causing any deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow extruded shape member which is subjected to bending work, and more particularly, to a hollow shape member provided with a flange when the bending operation is performed with the flange facing outside. The present invention relates to a cross-sectional shape of a hollow extruded shape member for bending, which can be bent without deforming.

[0002]

2. Description of the Related Art For example, an aluminum alloy extruded profile 100 having a sectional shape as shown in FIG. 7B is used for a front pillar P of an automobile as shown in FIG. 7A.

The extruded shape member 100 is a hollow member having a hexagonal scalene shape, and has a first flange piece 100b serving as a receiving surface of the windshield G, and a drip flange forming a sealing surface of the front door. The second flange piece 100c is provided on the outer peripheral side of the hollow frame main body 100a.

Since the front pillar P is curved along the shape of the windshield G, the extruded shape member 1
00 is shown in FIG.
Bending is applied as shown in FIG. That is, in the stretch bender, both ends of the extruded shape member 100 are chucked by the clamps C, and the extruded shape member 100 is pressed against the bending die D in a state in which a tensile force is appropriately applied in the longitudinal direction of the extruded shape member 100, whereby bending work is performed. Had been given.

[0005]

However, when bending the above-mentioned conventional extruded profile 100, the deformation of the second flange piece 100c can be restrained by bringing it into contact with the bending die D. Regarding the first flange piece 100b located outside the bending center,
Since it cannot be constrained by the bending die D, FIG.
There is a problem in that (a) is deformed as shown by a virtual line. Further, when the bending workability is high (the bending radius is small), as shown by the phantom line in FIG. 9 (b), even the shape member main body 100a is deformed, and the first flange piece 100b is accordingly deformed. There is a problem that it is further deformed, and solving such a problem has been a problem in bending a hollow shape member having a flange at a position outside the bending center.

Table 1 shows the results of an examination of the relationship between the working ratio (bending radius) and the amount of deformation in the bending of such hollow extruded profile 100.

[0007]

[Table 1]

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems in bending of a hollow profiled member having a flange, and in a hollow profiled member having a flange, the flange is on the outside. It is an object of the present invention to provide a hollow extruded shape member for bending that does not deform the flange portion even if it is bent.

[0009]

A hollow extruded profile for bending according to claim 1 of the present invention is a profile main body having a hollow cross section, and an outer surface of the profile main body which is an outer side in the bending process. In a hollow extruded profile for bending provided with a flange piece extending from a position, at least one reinforcing piece extending from a position other than a flange piece extending portion of the profile body and connected to the flange piece is provided. The present invention is characterized in that it has a certain structure, and such a structure of the extruded shape member is a means for solving the above-mentioned conventional problems.

As an embodiment of the hollow extruded profile for bending according to the present invention, in the extruded profile according to claim 2, the base end portion of the flange piece has an increased thickness. In the extruded shape member according to claim 3, the reinforcing piece is connected to the tip end portion of the flange piece, and in the extruded shape member according to claim 4, the reinforcement piece is located at a position closer to the base end from the tip end portion of the flange piece. Connected to
Furthermore, the extruded profile according to claim 5 is characterized in that the outside radius of curvature at the connection portion is larger than the radius of curvature on the side of the profile main body, and the extruded profile according to claim 6 is also the same as in claim 6. The extruded profile according to claim 7, wherein the reinforcing piece is provided with a curved portion, and the extruded profile according to claim 7 is inside the hollow part of the profile body from the inner surface side of the flange piece extending part of the profile body. 9. A configuration in which at least one partition wall is provided that extends and divides the hollow portion.
The extruded profile according to claim 1, wherein the partition wall is formed substantially parallel to the bending center direction, and further, in the extruded profile according to claim 9, a reinforcing piece is formed from an extending portion of the flange piece in the profile body. The configuration is such that the portion extending to the extended portion is removed, and the feature is that such a configuration in the hollow extruded profile for bending is used as a means for solving the above-mentioned conventional problems.

[0011]

In the hollow extruded profile for bending according to the first aspect of the present invention, the flange piece extending from the main body of the profile is connected to the reinforcing piece extending from another position of the main body of the profile. Since the movement of the flange piece is restrained by the reinforcing piece, the flange portion is not easily deformed even if the flange piece is bent so that the flange piece is on the outside.

In the extruded profile according to claim 2 as an embodiment of the present invention, since the wall thickness of the base end portion of the flange piece extending from the profile body is increased, stress concentration on the portion is relaxed. As a result, the deformation of the flange portion can be effectively prevented even during bending with a higher degree of working.

Similarly, in the extruded shape member according to claim 3 as an embodiment, since the reinforcing piece is connected to the tip end portion of the flange piece, the restraining action of the reinforcing piece works more effectively, and the flange portion The deformation prevention effect is improved.
Further, in the extruded shape member according to claim 4, since the reinforcing piece is connected to a position closer to the base end portion from the tip end portion of the flange piece, the flange piece is not deformed at the tip end portion, and bending work is not performed. It will be done well. Similarly, in the extruded shape member according to claim 5 as an embodiment, since the outside radius of curvature at the connecting portion between the reinforcing piece and the flange piece is larger than the side of the shape body, that is, the inside radius of curvature, the reinforcing piece Even when the is connected to a portion other than the tip portion of the flange piece, the deformation of the tip portion of the flange piece is effectively prevented.

Further, as an embodiment of the present invention, claim 6
In the extruded shape material according to (1), since the reinforcing piece has the curved portion, the bending workability is improved, and the deformation of the flange portion is effectively prevented even in severe bending work.

In the extruded profile according to claim 7,
Since the partition wall that extends from the inner surface side of the flange piece extending portion and divides the hollow portion is provided in the hollow portion of the shape member body, deformation of the shape member body is prevented even in severe bending. Further, in the extruded shape member according to claim 8, since the partition wall is arranged substantially parallel to the bending center direction, the effect of preventing deformation of the shape member body is improved, and even in bending processing with a higher degree of processing. The deformation is prevented more effectively.

Also, in the extruded shape member according to claim 9 as an embodiment of the present invention, the portion from the extending portion of the flange piece to the extending portion of the reinforcing piece in the shape body is removed. The profile weight is reduced with almost no loss of the flange piece deformation prevention effect.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings.

Embodiment 1 FIG. 1A is a sectional view showing a first embodiment of a hollow extruded shape member for bending according to the present invention, and the extruded shape member 1 shown in FIG. An aluminum alloy used as a structural member for a front pillar of an automobile as shown in a), which has a hollow cross section and has a hexagonal unequal polygonal shape. A first flange piece (flange piece) 3 that extends obliquely upward from the portion 2a (flange piece extension portion) and serves as a windshield receiving surface 3
And a second flange piece 4 extending from a fifth corner portion 2c located on the left side of the profile main body 2 and serving as a drip flange of a front door sealing surface. It should be noted that, of the first flange piece 3 and the second flange piece 4, the first flange piece 3 is located outside of the bending process described later, that is, from the side of the bending center located in the lower part of the drawing, the shape member main body. It is located in a part that cannot be seen as the shadow of 1.

Further, the extruded shape member 1 is provided with a reinforcing piece 5 extending from the second corner portion 2b (reinforcing piece extending portion) of the shape member main body 2 toward the first flange piece 3, and the reinforcement is performed. The piece 5 is connected to the first flange piece 3 at a position slightly closer to the base end from the tip portion 3a of the first flange piece 3. In the connecting portion between the reinforcing piece 5 and the first flange piece 3, the outside radius of curvature Ro is larger than the inside radius, that is, the radius of curvature Ri on the side of the profile main body 2.

Extruded profile 1 having such a cross-sectional shape
In addition, the tensile force is applied by the stretch bender as shown in FIG. 8 while pressing the bending die D as shown in FIG. Bending is performed centering on the lower middle side.

At this time, the second flange piece 4 is constrained by contacting the bending die D, and the first flange piece 3 is connected to the reinforcing piece 5, so that both are deformed. Better bending can be done without At the connecting portion between the first flange piece 3 and the reinforcing piece 5, the outer radius of curvature Ro is larger than the inner radius of curvature Ri, so the first flange piece 3 is deformed at the tip 3a. There is nothing to do.

Embodiment 2 FIG. 2 is a cross-sectional view showing a second embodiment of a hollow extruded shape member for bending according to the present invention, in which the extruded shape member 1 shown in the figure is the shape of the main body 2 of the shape member. The radius of curvature Rb at the base end portion of the first flange piece 3 extending from the first corner portion 2a is increased to increase the wall thickness of the first flange piece 3 at the base end portion. Example 1 except for the parts
The shape is basically similar to that of (FIG. 1).

As described above, by thickening the wall thickness of the base end portion of the first flange piece 3, it is possible to avoid stress concentration at the time of bending work, and to prevent the first flange piece 3 from being subjected to more severe bending work. The deformation can be effectively prevented.

Embodiment 3 FIG. 3 is a sectional view showing a third embodiment of the hollow extruded shape member for bending according to the present invention. In the extruded shape member 1 according to the embodiment, the shape member main body is used. The reinforcing piece 5 extending from the second corner portion 2b of the second flange 2 is connected at the tip portion 3a of the first flange piece 3, and except this point, the shape is basically the same as that of the second embodiment (FIG. 2). It is equipped with.

Extruded profile 1 having such a cross-sectional shape
In the above, since the reinforcing piece 5 supports the first flange piece 3 at its tip portion 3a, the deformation restraining effect of the first flange piece 3 can be maximized and the first flange piece 3 can be subjected to the severe bending process. The deformation of the flange piece 3 can be prevented more reliably.

Embodiment 4 FIG. 4 (a) is a sectional view showing a fourth embodiment of a hollow extruded shape member for bending according to the present invention. In the extruded shape member 1 according to the embodiment, The first flange piece 3 is reinforced by the reinforcing piece 5 having the curved portion 5a.

In the extruded shape member 1 according to the embodiment, since the reinforcing piece 5 has a curved shape, the bending workability is improved, and it becomes possible to endure more severe bending work.

In this case, as shown in FIG. 4B, the portion from the first corner portion 2a to the second corner portion 2b of the profile main body 2, that is, the flange piece 4 shown by a broken line in the drawing. By deleting the portion extending from the extended portion to the extended portion of the reinforcing piece 5, it is possible to reduce the weight of the profile without sacrificing the deformation prevention effect during bending.

Embodiment 5 FIG. 5 is a cross-sectional view showing a fifth embodiment of the hollow extruded shape member for bending according to the present invention, and the extruded shape member 1 shown in the drawing is the embodiment shown in FIG. Similar to the extruded profile according to Example 3, the first extending from the first corner portion 2a of the profile main body 2
A flange piece 3 and a reinforcing piece 5 extending from the second corner portion 2b of the profile body and connected to the first flange piece 3 at its tip portion 3a are provided, and the first flange piece 3 is provided.
Further includes a partition wall 6 extending from the inner surface side of the first corner portion 2a, which is the extending portion of the profile member, in the bending center direction, and across the hollow portion of the profile member body 2 and connected to the inner surface of the profile member body 2 facing each other. ing.

Extruded profile 1 having such a cross-sectional shape
At the time of bending, the reinforcing piece 5 restrains the deformation of the first flange piece 3 and the partition wall 6 arranged across the hollow portion of the shape body 2 restrains the deformation of the shape body 2. , Even in the case of more severe bending, the first
It is possible to reliably prevent the deformation of the flange piece 3 together with the shape member main body 2.

Embodiment 6 FIG. 6 is a sectional view showing a sixth embodiment of a hollow extruded shape member for bending according to the present invention. The extruded shape member 1 according to this embodiment is shown in FIG. 5), the weight of the profile is reduced by removing the portion from the flange piece extending portion 2a to the reinforcing piece extending portion 2b of the shape body 2 as shown in FIG. Similar to the extruded shape member according to Example 5, a partition wall 6 that extends from the inner surface side of the flange piece extending portion 2a and divides the hollow portion of the shape member body 2 is provided. By making the cross section of such a shape into such a shape, it is possible to prevent deformation of the profile main body 2 and the first flange piece 3 against severe bending, while avoiding an increase in weight of the profile.

When the extruded shape member 1 is bent into a three-dimensional shape, a plurality of partition walls 6 as shown in FIG. 5 and FIG. It is desirable to make it parallel to the bending center direction, so that even in complicated three-dimensional bending processing,
It becomes possible to reliably prevent the deformation of the shape member body 2 and the flange piece 3.

In each of the above embodiments, the aluminum alloy hollow extruded profile used for the front pillar of the automobile is described as an example. However, the bending hollow extruded profile according to the present invention is made of aluminum. The present invention is not limited to the system materials and the structural members for automobiles, but can be widely applied to all members that have a flange and that are required to be bent with the flange on the outside.

[0034]

As described above, according to the first aspect of the present invention.
In the case of the hollow extruded profile for bending according to, the deformation of the flange piece extending from the main body of the profile is constrained by the reinforcing piece, so the bending process was performed so that the flange piece is on the outside. Even in this case, the extremely excellent effect that the deformation of the flange portion can be effectively prevented is brought about.

In the profile according to claim 2 as an embodiment of the hollow extruded profile for bending according to the present invention, the wall thickness of the base end of the extending flange piece is increased. Concentration of stress can be avoided and deformation of the flange can be effectively prevented even during severe bending.
Similarly, in the profile according to claim 3 as an embodiment, since the reinforcing piece is connected to the tip end portion of the flange piece, the function of the reinforcing piece can be made more effective, and the deformation of the flange piece can be prevented. The effect can be improved. Further, in the extruded shape member according to claim 4, since the reinforcing piece is connected to a position closer to the base end portion from the tip end portion of the flange piece, the flange piece is not deformed at the tip end portion, so that the good bending can be achieved. Can be processed. Furthermore, in the shape member according to claim 5 as an embodiment, since the outer radius of curvature at the connecting portion between the reinforcing piece and the flange piece is larger than the radius of curvature on the side of the shape member body, Even when the flange piece is connected to a portion other than the tip portion, it is possible to effectively prevent the deformation of the tip portion of the flange piece. In the extruded shape member according to claim 6, since the reinforcing piece has the curved portion. In addition, the bending workability can be improved, and the deformation of the flange portion can be effectively prevented even in more severe bending work. Furthermore, in the extruded profile according to claim 7 as an embodiment, since the partition wall is provided in the hollow portion of the profile body, deformation of the profile body can be prevented even in severe bending. In the extruded shape member according to No. 8, since the partition wall is arranged substantially parallel to the bending center direction, it is possible to more reliably prevent the deformation of the shape member body even in bending processing with a higher degree of processing, In the extruded shape member according to claim 9, since the portion between the extending portion of the flange piece and the extending portion of the reinforcing piece of the shape body is removed, the effect of preventing deformation during bending is almost impaired. The excellent effect that the weight of the profile can be reduced without being brought about.

[Brief description of drawings]

FIG. 1 (a) is a sectional view showing a first embodiment of a hollow extruded shape member for bending according to the present invention. (B) It is sectional drawing explaining the bending process condition of the extrusion profile shown to Fig.1 (a).

FIG. 2 is a cross-sectional view showing a second embodiment of a hollow extruded shape member for bending according to the present invention.

FIG. 3 is a cross-sectional view showing a third embodiment of a hollow extruded profile for bending according to the present invention.

FIG. 4 (a) is a sectional view showing a fourth embodiment of a hollow extruded shape member for bending according to the present invention. (B) FIG. 5 is a cross-sectional view showing a shape example of the shape member which is made lighter by partially deleting the shape member body portion of the extruded shape member shown in FIG. 4 (a).

FIG. 5 is a cross-sectional view showing a fifth embodiment of the hollow extruded shape member for bending according to the present invention.

FIG. 6 is a sectional view showing a sixth embodiment of a hollow extruded shape member for bending according to the present invention.

FIG. 7 (a) is a perspective view of an automobile showing a location where a hollow extruded profile for bending is applied. (B) It is sectional drawing which shows the shape of the conventional hollow extrusion for bending.

FIG. 8 is a schematic view showing a bending procedure of a hollow extruded profile for bending.

FIG. 9 is a cross-sectional view for explaining deformation of a conventional hollow extruded shape member for bending by bending, (a) showing a case where the degree of work is low, and (b) showing a case where the degree of work is high. Is.

[Explanation of symbols]

 1 Hollow Extruded Profile for Bending 2 Profile Main Body 2a First Corner (Flange Piece Extension) 2b Second Corner (Reinforcement Extension) 3 First Flange (Flange Piece) 3a, Tip 5 Reinforcing piece 5a Curved part 6 Partition wall

Claims (9)

[Claims] 1. A hollow extruded profile for bending, comprising: a profile main body having a hollow cross section; and a flange piece extending from a position on the outer surface of the profile main body which is outside in bending. At least 1 extending from a position other than the flange piece extending portion of the material body and connected to the flange piece
Hollow extruded profile for bending, which is provided with two reinforcing pieces. 2. The hollow extruded shape member for bending according to claim 1, wherein a wall thickness of a base end portion of the flange piece is increased. 3. The hollow extruded shape member for bending according to claim 1 or 2, wherein the reinforcing piece is connected to a tip end portion of a flange piece. 4. The hollow extruded shape member for bending according to claim 1, wherein the reinforcing piece is connected to a position near the base end from the tip end of the flange piece. 5. The hollow extruded shape member for bending according to claim 4, wherein an outer radius of curvature of the connecting portion is larger than a radius of curvature on the side of the shape member body. 6. The hollow extruded shape member for bending according to claim 1, wherein the reinforcing piece has a curved portion. 7. At least one partition wall, which extends from the inner surface side of the flange piece extending portion of the profile main body and divides the hollow part, is provided in the hollow portion of the profile main body. A hollow extruded profile for bending according to any one of claims 1 to 6. 8. The hollow extruded profile for bending according to claim 7, wherein the partition wall is formed substantially parallel to the bending center direction. 9. The bending according to any one of claims 1 to 8, wherein a portion from the extending portion of the flange piece to the extending portion of the reinforcing piece in the main body of the profile is removed. Hollow extruded profile for processing.