JPH0826143A - Extruded member for hollow panel, and manufacture of hollow panel using it - Google Patents

Abstract

PURPOSE:To provide a manufacturing method of an extruded shape for a hollow panel and a hollow panel using the extruded shape to manufacture the wide hollow panel with less unevenness in a simple manner. CONSTITUTION:In an extruded shape 1 for a hollow panel, adjacent sets of at least two hollow panels 2, 3, 4, 5 are connected to each other in the V-shape or reverse V-shape through a connecting piece 6 at the end. Engagement parts 22, 32 to be engaged in the direction to keep the developed condition in the plane developed condition of the hollow panel unit are formed at the adjacent end part of the connected hollow panel unit. The positional relationship between the connecting piece and the engagement part in the thickness direction of the hollow panel unit is preferably reverse in an alternate manner for each connected part. In the manufacturing method of the hollow panel, the adjacent hollow panel units 2, 3, 4, 5 of the extruded shape 1 for the hollow panel are developed to be worked in the plane developed condition until the engagement parts 22, 32 of the adjacent end parts are engaged with each other by deforming the connecting piece 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow panel extruded profile for producing a wide hollow panel such as an automobile floor panel and a method for producing a hollow panel using the extruded profile.

[0002]

2. Description of the Related Art Conventionally, in the manufacture of a wide hollow panel as described above, one flat plate member and a rectangular member having a rectangular cross section are arranged to face each other and welded, or a plurality of separated hollow panel units are used. The end portions of the above are abutted to each other in a fitted state, and further, a method such as direct extrusion molding using a large-sized extruder is performed.

[0003]

However, in the method of welding one flat plate member and rectangular member in cross section, one method is used.
Since the size of a single flat plate member or rectangular member having a rectangular cross section becomes the size of the hollow panel as it is, in order to manufacture a wide hollow panel, it is necessary to prepare a large flat plate member or a rectangular member having a rectangular cross section. In addition, the handling and storage thereof are complicated, and the welding work between the flat plate-shaped member and the rectangular cross-sectional member is troublesome, and the cost is high.

Further, in the method of abutting the end portions of a plurality of separate and independent hollow panel units in a fitted state, a misalignment or the like is likely to occur at the abutting portions, and local differences or irregularities are produced in the manufactured hollow panel. However, it has a drawback that it is easy to occur and the matching work is troublesome. In addition, in order to secure the sealing property of the butted portion, it is necessary to perform welding at two positions on the front surface and the back surface of the panel, which not only makes the welding work troublesome but also may impair the sealing property if there is a welding defect. there were. Further, there is a drawback that the fitting itself becomes difficult when the wall thickness is thin.

Further, in the method of directly extruding a wide hollow panel with a large-sized extruder, a die having a large die diameter has to be used, and there are problems that the die cost is high and the die life is short. Moreover, there is also a problem that as the hollow panel becomes larger, it becomes difficult to reduce the wall thickness due to technical limitations.

The present invention has been made in order to solve the above-mentioned drawbacks, and it is possible to efficiently manufacture a wide hollow panel which has few misalignments and the like, is excellent in sealing property and can be thinned, by a simple method. It is an object of the present invention to provide an extruded profile for a hollow panel and a method for manufacturing a hollow panel using the extruded profile.

[0007]

SUMMARY OF THE INVENTION For the above-mentioned objects, the present invention will be described with reference to the reference numerals of the drawings.
A connecting piece (6) in which the adjacent ones of the two hollow panel units (2), (3), (4) and (5) are provided along the ends.
Are connected to each other in a V-shape or an inverted V-shape in cross section, and are connected to adjacent ends of the connected hollow panel units in a direction in which the hollow panel units maintain the expanded state in a plane expanded state. The gist of the present invention is an extruded profile for a hollow panel, characterized in that engaging parts (22) (32) for engaging with are formed. Preferably, the connecting piece (6) and the engaging portions (22) (32) in the thickness direction of the hollow panel unit.
The positional relationship with and is alternately reversed for each connecting portion of the hollow panel units.

Further, the adjacent hollow panel units (2), (3), (4) and (5) of the extruded profile (1) according to claim 1 are deformed at the connecting pieces (6) so that the adjacent end portions are engaged. Joint part (22) (32)
The gist of the present invention is to provide a method for manufacturing a hollow panel, which is characterized in that the hollow panels are opened and processed until they engage with each other.

[0009]

Function: The adjacent hollow panel units (2), (3), (4) and (5) of the extruded profile for hollow panel (1) are deformed at the connecting piece (6) to engage the engaging portion (22) at the adjacent end. ) (32) is opened and processed in a flattened state until they engage with each other, whereby a wide hollow panel (A) is manufactured. In addition, since each hollow panel unit is previously connected by the connecting piece (6) and is engaged by the engaging portions (22) (32), the risk of causing misalignment at the abutting portions is reduced. Since the panel unit is constrained by the above-mentioned connection and engagement, the welding operation is simplified when welding the butt portion.
The connecting piece (6) is a hollow panel unit (2) produced by extrusion.
(3) Since it is formed integrally with (4) and (5), even if a liquid such as water enters the hollow panel, the connecting piece (6) prevents further intrusion and permeation, and the sealing property is improved. Will also be excellent.

Further, the positional relationship between the connecting piece (6) and the engaging portions (22) and (32) in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit. When welding the abutting portions, the directions of the bending moments acting on the connecting portions due to the thermal strain caused by the welding are opposite to each other at the adjacent connecting portions. For this reason,
There is no inconvenience that the entire hollow panel is deformed in an arc shape when all the connecting portions receive bending moments in the same direction, and the flatness of the entire hollow panel is secured.

[0011]

Next, an embodiment in which the present invention is applied to a hollow panel made of aluminum (including its alloy, the same applies hereinafter) will be described with reference to the drawings.

FIG. 2 shows an extruded profile (1) made of aluminum for a hollow panel. In this extruded profile (1) for hollow panels, a plurality (4 in the embodiment) of thin-walled flat panel units (2), (3), (4) and (5) are adjacent to each other and cross-sectioned with each other. They are arranged in an inverted V shape or a V shape, and have an inverted W shape in cross section. This extruded shape member is formed by extruding an aluminum billet having an inverted W-shaped cross section and then cutting it into a predetermined length in a direction orthogonal to the extruding direction. The two adjacent hollow panel units are provided along the inner end edge on the side surfaces of the adjacent end portions, and have an inverted U-shaped cross section extending inward from the end edge in the thickness direction of the panel unit or They are connected to each other via U-shaped connecting pieces (6).

Further, as shown representatively in the vicinity of the ends of the two hollow panel units (2) and (3) on the left side in FIG. 1, the adjacent ends of two adjacent hollow panel units (2) and (3). Abutting pieces (21) (31) are respectively provided on the outer edge of the side surface of the part along the edge in a direction perpendicular to the thickness direction of the panel unit. These abutting pieces (21) (31) are so arranged that, when the hollow panel units (2) (3) are opened and processed in a flattened state, the tips of the abutting pieces abut or almost abut. The protruding length is set. In addition, an engaging projection (22) having a semicircular cross section that protrudes toward the connecting piece (6) is formed on the inner surface of the tip of the contact piece (21) in one hollow panel unit (2). . Further, on the inner surface of the tip portion of the contact piece (31) in the other hollow panel unit (3), an engaging hook portion (32) bulging toward the connecting piece (6) has a J-shaped cross section.
Are formed. The engagement hook portion (32) and the engagement projection (22) are such that when the hollow panel unit is opened and processed into a flattened state, the engagement projection (22) forms a recessed portion () of the engagement hook portion (32). The size and shape are set so that they can be engaged with each other by being fitted in 32a).

The constructions of the adjacent ends of the hollow panel units (3) and (4) and (4) and (5) are the same as the constructions of the hollow panel units (2) and (3). 6), abutting pieces (21) (31), engaging protrusions (22), and engaging hooks (32) are formed, but engage with the connecting piece (6) in the thickness direction of the hollow panel unit. The positional relationship between the protrusion (22) and the engaging hook portion (32) is alternately reversed for each connecting portion of the hollow panel units. That is, as shown in FIGS. 2 and 4, in the connecting portion of the hollow panel units (2) and (3), the connecting piece (6) is provided on the lower edge side in the thickness direction of the hollow panel unit and on the upper edge side. An engagement protrusion (22) and an engagement hook portion (32) are provided. Also, hollow panel unit (3)
In the connecting portion of (4) and (4), conversely to the above, the connecting piece (6) is provided on the upper edge side in the thickness direction of the hollow panel unit, and the engaging projection (22) and the engaging hook portion (32) are provided on the lower edge side. It is provided. Further, in the connecting portion of the hollow panel units (4) and (5), the connecting piece (6) is provided on the lower edge side in the thickness direction of the hollow panel unit.
However, the engaging protrusion (22) and the engaging hook portion (32) are provided on the upper edge side of the hollow panel unit (2) (3) (4).
The connection portions of (5) are alternately reversed.

Next, a method of manufacturing a hollow panel using the extruded profile (1) shown in FIGS. 1 and 2 will be described. Adjacent hollow panel units (2) (3) (4) (5) Opening is performed while deforming the connecting piece (6) so that the angle formed by the panel unit becomes large. As the opening process progresses, the adjacent ends of both hollow panel units (2), (3), (4), and (5) gradually approach each other. The tip of the engaging hook portion (32) of one hollow panel unit (3) (hereinafter, the hollow panel units (2) and (3) will be described as an example) is engaged with the other hollow panel unit (2). Although it abuts on the protrusion (22), when the opening process is further advanced, the engaging hook portion (32) is elastically deformed and guided along the edge of the engaging protrusion (22). Then, when the connecting piece (6) is linearly deformed and the hollow panel unit is opened and processed to a flat development state as shown in FIGS. 3 and 4, both of the adjacent hollow panel units (2) and (3) are processed. The tips of the abutting pieces (21) (31) come into contact with each other in a butted state, and the engaging projections (22) in one hollow panel unit (2) are engaged with the engaging hooks (in the other hollow panel unit (3) ( (32) fits into the recess (32a), and the engaging protrusion (2
2) and the engaging hook part (32) are engaged with each other, and the state in which the return to the original shape is prevented is deformed.

Thus, the flat wide hollow panel (A)
After that, if necessary, the abutting portions (7) of the contact pieces (21) (31) are welded. Since each panel unit is constrained by the coupling by the coupling piece (6) and the engagement of the engagement protrusion (22) with the engagement hook (32), the welding work can be easily performed. Moreover, the positional relationship between the connecting pieces (6) and the engaging portions (22) (32) in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit.
The directions of bending moments acting on the connecting portions due to welding thermal strain generated when welding the abutting portions (7) of the contact pieces (21) (31) are opposite to each other at the adjacent connecting portions.
Therefore, it is possible to prevent the inconvenience that the entire hollow panel is deformed in an arc shape due to the bending moments in the same direction applied to all the connecting portions, and the flatness of the entire hollow panel can be well ensured.

Further, in this embodiment, the contact pieces (21) (3) are provided in each panel unit (2) (3) (4) (5).
Since the engaging projections (22) and the engaging hooks (32) are formed in the space between 1) and the connecting piece (6), these engaging projections (in the completed state of the wide hollow panel (A) are 22) and the engaging hook (32) are housed in the space (8) between the abutment pieces (21) (31) and the connecting piece (6) and are not exposed to the outside, so that the appearance is as if It looks like a single hollow panel and looks good.

Further, since the connecting piece (6) is integrally formed with each hollow panel unit (2), (3), (4) and (5) by extrusion, moisture etc. from the abutting portion (7) due to defective welding or the like. Even if the liquid of (1) enters the panel, it does not pass through the connecting piece (6) and the sealing property is extremely excellent.

[0019]

According to the present invention, depending on the above, at least two hollow panel units adjacent to each other are V-shaped in cross section or connected to each other via a connecting piece provided along the end. Engagement portions that are connected in an inverted V shape and that engage with adjacent ends of the hollow panel units connected by the connecting pieces in a direction in which the hollow panel units are maintained in the expanded state in a planar expanded state. It is characterized by being formed. Therefore, the adjoining hollow panel unit of the extruded profile can be widened by a very simple operation of deforming the connecting piece and opening the flattened state until the engaging portions of the adjacent ends engage with each other. The hollow panel can be efficiently manufactured. As a result, as in the case of arranging and joining one flat plate-shaped member and rectangular-shaped member in cross section,
The inconvenience of having to prepare a large flat plate member or a member having a rectangular cross section is eliminated, and compact extruded shape members connected in a V-shaped cross section or an inverted V-shaped cross section can be prepared. Will also be easier.

Further, since each hollow panel unit is previously connected by the connecting piece and is engaged by the engaging portion, the end portions of the plurality of separated hollow panel units are butted against each other and fitted together. It is possible to reduce the risk of misalignment at the butted part, as when welding parts.
It is possible to provide a hollow panel with few local steps or irregularities. Moreover, since the connecting piece is formed integrally with the hollow panel unit by extrusion, even if a liquid such as water enters the hollow panel, the connecting piece can prevent further intrusion and permeation, It can be a hollow panel with extremely excellent sealing properties.

Furthermore, when welding the butt portions, it is not necessary to weld one butt portion from both the front and back sides of the panel, and only one welding point is required, and in addition, the connecting piece and the engaging portion are used. Since each panel unit is constrained by, the welding work can be easily performed. Further, since the positional relationship between the connecting piece and the engaging portion in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit, when welding the butt portion, the welding causes The directions of the bending moments that act on the connecting portions due to the thermal strains that occur can be reversed in the adjacent connecting portions. Therefore, it is possible to prevent the inconvenience that the entire hollow panel is deformed in an arc shape due to the bending moments in the same direction applied to all the connecting portions, and the entire hollow panel can be kept flat, and good flatness is required. It can be suitably used for floor panels for automobiles and the like.

Furthermore, since the hollow panel unit is not extruded as one wide hollow panel but extruded as a shape member in which the hollow panel units are connected in a V-shaped cross section or an inverted V-shaped section, a die having a large die diameter is used. Since it is not necessary to use, it is possible to prevent the die life from being shortened, and it is possible to reduce the thickness of the panel.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a perspective view showing an embodiment of an extruded profile material for hollow panels according to the present invention.

FIG. 3 is a cross-sectional view of a main part of a hollow panel manufactured using the extruded profile material for hollow panel of FIG.

FIG. 4 is a cross-sectional view of a hollow panel manufactured by using the extruded profile for hollow panel of FIG.

[Explanation of symbols]

 A ... Hollow panel 1 ... Hollow panel extruded profile 2, 3, 4, 5 ... Hollow panel unit 6 ... Connecting piece 22 ... Engaging protrusion (engaging portion) 32 ... Engaging hook portion (engaging portion)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Saito 1-4-1 Chuo, Wako-shi, Saitama, Honda R & D Co., Ltd. (72) Inventor Mitsuhiro Kitano 6-224, Kaiyamacho, Sakai City Showa Aluminum Incorporated (72) Inventor Yasushi Tashiro 6224, Umiyamacho, Sakai City Showa Aluminum Co., Ltd. (72) Inventor Tatsuji Ono 6224, Umiyamacho, Sakai City Showa Aluminum Co., Ltd.

Claims (3)

[Claims] 1. At least two hollow panel units (2)
(3) The adjacent pieces of (4) and (5) are connected to each other in a V-shape or an inverted V-shape in cross section through a connecting piece (6) provided along the end. And, in the adjacent ends of the connected hollow panel units, engaging portions (22) (32) that are engaged with each other in a direction in which the hollow panel units are held in a flattened state in a plane developed state. Extruded profile for hollow panels. 2. The positional relationship between the connecting pieces (6) and the engaging portions (22, 32) in the thickness direction of the hollow panel unit is alternately reversed for each connecting portion of the hollow panel unit. Item 1. The extruded profile for hollow panels according to Item 1. 3. The adjacent hollow panel units (2), (3), (4) and (5) of the extruded profile (1) according to claim 1 or 2, wherein the connecting piece (6) is deformed so that the adjacent hollow panel units A method for manufacturing a hollow panel, characterized by performing open processing until the engaging portions (22, 32) are engaged with each other in a flattened state.