JPH10277683A - Press forming method, forming method for automobile body and its construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile body construction capable of saving the handling time for body assembling, reducing a production cost and further improving stiffness of a body. SOLUTION: When an opening 5 is formed to an inner panel 2 constructing a door 1, while leaving a part forming a reinforcing part 10 in continuing to a base end part 10a, by forming notches at its surrounding and blanking other parts not forming the reinforcing part 10, the reinforcing part 10 is integrally formed in continuing to the inner panel 2. The reinforcing part 10 is formed with a rib shape 13, in which a bottom streak 11 and a projected streak 12 are extended over the base end part 10a and a tip end part 10b, and is bent to an outer panel 3 side at a state having a prescribed radius of curvature in the direction roughly orthogonal to the longitudinal direction of the rib shape 13, a flange formed to the tip end part 10b is fixed by a sealer 15 to the outer panel 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a press molding method,
The present invention relates to a method for molding a body of an automobile and a structure thereof.

[0002]

2. Description of the Related Art A general automobile body is constructed by assembling an inner panel and an outer panel formed by pressing each component. Particularly, in the case of a so-called one-box car or RV car door 51 or the like having a high vehicle height, the area of both panels is larger than that of a sedan. Therefore, as shown in FIG. By connecting the panel with the reinforcing member 60, the rigidity of the body is maintained.
The reinforcing member 60 is separate from the panels 52 and 53, is fixed to the inner panel 52 by spot welding or the like, and is fixed to the outer panel 53 by an adhesive (referred to as a sealer 15).

[0003]

In the above prior art, since the reinforcing member 60 is a member separate from the panels 52 and 53, it takes time to fix the reinforcing member 60. There was a problem that cost could not be reduced. Further, in the above-described conventional technique, there is a problem that it is difficult to increase the rigidity of the body because the reinforcing member 60 separate from the inner panel 52 is fixed by spot welding or the like.

[0004] Therefore, in the case of a door 71 as a part of a body of an automobile, for example, as shown in FIG.
When forming the opening 75 by pressing in a portion where the door trim (not shown) of the inner panel 72 is assembled, it is possible to leave a part of the inner panel 72 and integrally provide the reinforcing portion 80 continuous with the inner panel 72. Conceivable. In this case, FIG. 11 and FIG.
As shown in FIG. 2, the reinforcing portion 80 is bent toward the outer panel 73, and the tip portion 80b is fixed to the outer panel 73 by the sealer 15.

In this case, the rigidity of the body is reduced by simply bending the flat reinforcing portion 80 provided integrally with the inner panel 72 toward the outer panel 73 and fixing the tip portion 80b to the outer panel 73. I can't hope to keep it. That is, it is necessary to form the rib shape 83 such that the valleys 81 and the ridges 82 extend between the base end portion 80a and the tip end portion 80b of the reinforcing portion 80. Then, when such a reinforcing portion 80 is formed, as shown in a perspective view in FIG. 11, first, a rib shape 83 is formed by pressing, and then, as shown in a sectional view in FIG. Is formed so as to be able to be fixed to the outer panel.

However, when the distal end portion 80b of the reinforcing portion 80 formed as described above is bent so that it can be fixed to the outer panel 82, it extends over the base end portion 80a and the distal end portion 80b of the reinforcing portion 80. The ribs 83 are bent so as to be substantially perpendicular to the longitudinal direction of the rib shape 83 formed as described above. When the rib shape 83 is bent, the radius of curvature is different between the ridges 82 and the valleys 81 of the rib shape 83, and therefore, as shown by the arrow in FIG. When the buckling amount is relatively small, the bent portion becomes an acute angle, and when the buckling amount is relatively large, wrinkles occur. In this case, there is a problem that the strength of the reinforcing portion 80 for maintaining the rigidity of the body cannot be guaranteed in any case.

As described above, it is actually difficult to form the rib shape on the reinforcing portion and to bend the reinforcing portion so as to be substantially perpendicular to the longitudinal direction of the rib shape. Did not exist before. Also,
In addition to the body of the automobile, there has been no press molding method in which the formed rib shape is bent so as to be substantially perpendicular to the longitudinal direction.

[0008] The present invention has been made in view of the above problems, and a first object of the present invention is to provide a plate member having a rib shape formed thereon.
An object of the present invention is to provide a press forming method that can be bent so as to be substantially perpendicular to the longitudinal direction of a rib shape without buckling.

A second object of the present invention is to form a reinforcing member having a rib shape integrally with one of the panels, and to bend the reinforcing member so as to be substantially perpendicular to the longitudinal direction of the rib shape without buckling. It is an object of the present invention to provide a method for molding an automobile body. In addition, another object of the present invention is to provide a method of molding a body of an automobile, which can save the labor of assembling the body, reduce the manufacturing cost, and further increase the rigidity of the body.

A third object of the present invention is to form the reinforcing member integrally with one of the panels, so that the labor for assembling the body can be reduced, the manufacturing cost can be reduced, and the rigidity of the body can be reduced. Another object of the present invention is to provide a structure of an automobile body that can further enhance the vehicle body structure.

[0011]

Means for Solving the Problems In order to achieve the first object, the invention according to the first aspect of the present invention is directed to a press forming method, in which a plate-shaped rib having valleys and ridges is formed.
A press forming method for bending in a direction substantially orthogonal to the longitudinal direction of the rib shape, in which preliminary drawing is performed locally on a plate material, and the portion subjected to the preliminary drawing is projected in the pressing direction. A valley is formed, and the valley is bent in a direction substantially perpendicular to the rib shape while extending in the longitudinal direction of the valley.

In order to achieve the second object, a second aspect is provided.
The invention related to the method of molding a body of an automobile is a method of molding a body of an automobile in which an inner panel and an outer panel are assembled, wherein continuous reinforcement is performed by forming a cut in one panel while leaving a base end portion. Provide a portion, at the same time or before and after the provision of the reinforcing portion, perform preliminary drawing on the reinforcing portion, so that the portion subjected to the preliminary drawing is protruded in the pressing direction, and the base end of the reinforcing portion. While forming the rib shape which consists of a valley and a ridge extending over the tip part, it is bent in the direction substantially perpendicular to the rib shape while extending in the longitudinal direction of the valley, and the one of the panels is assembled together with the assembly of both panels. The front end of the reinforcing portion of the panel is fixed to the other panel.

[0013] To achieve the third object, a third aspect is provided.
The invention relating to the structure of a body of a press car of the present invention is a structure of a body of a car comprising an inner panel and an outer panel, wherein a continuous reinforcing portion is provided integrally with one of the panels, and the reinforcing portion is A rib shape consisting of a valley and a ridge extending over the end and the tip is formed, bent in a direction substantially perpendicular to the longitudinal direction of the rib, and the tip is fixed to the other panel. It is characterized by the following.

According to the first aspect of the present invention, a preliminary drawing is performed on the rib-shaped valley portion of the plate material, and then the pre-drawn portion is projected in the pressing direction. While forming a rib shape consisting of mountain strips,
It is bent in a direction substantially perpendicular to the rib shape while extending in the longitudinal direction of the rib shape. The portion that has been subjected to the preliminary drawing is bent in a direction substantially orthogonal to the rib while being stretched in the longitudinal direction of the rib shape, and therefore does not buckle.

According to the second aspect of the present invention, a notch is formed in one of the panels while leaving the base end thereof, whereby a continuous reinforcing portion is integrally provided on the panel. Therefore, the rigidity is higher than when a separate reinforcing member is fixed to the panel. Preliminary drawing is recessed in a portion where a rib-shaped valley is formed after the reinforcing portion, and a rib shape extending over the base end and the distal end of the reinforcing portion is formed so as to project in the pressing direction. At the same time, it is bent in a direction substantially perpendicular to the rib shape. At this time, since the reinforcing portion is bent while being stretched in the longitudinal direction of the rib shape, it does not buckle. After that, the front end of the reinforcing portion integral with one panel is fixed to the other panel, so that the labor for assembling the body can be saved and the manufacturing cost can be reduced.

According to the third aspect of the present invention, the reinforcing portion is integrally provided so as to be continuous with one of the panels, and a rib shape extending over the base end and the distal end of the reinforcing portion is formed. Accordingly, the rigidity is increased as compared with the case where a separate reinforcing member is fixed to one panel. In addition, when assembling the inner panel and the outer panel, it is only necessary to fix the front end of the reinforcing portion to the other panel, so that the labor for assembling the body is omitted and the manufacturing cost is reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a press molding method, an automobile body molding method and a structure thereof according to the present invention will be described in detail with reference to FIGS. In addition,
In this embodiment, a case where a door is formed as a body of an automobile will be described. However, the present invention is not limited to this, and a molding method for molding other components of an automobile and its structure. It goes without saying that the present invention can also be applied to a press forming method for forming a rib shape on a plate material other than the body of an automobile and bending the rib material in a direction substantially perpendicular to the longitudinal direction of the rib shape.

First, the structure of the door of the automobile according to the present invention will be described. The door 1 generally includes an inner panel 2 and an outer panel 3 formed by pressing, and a reinforcing portion 10 continuous with the inner panel 2 is provided integrally, and the reinforcing portion 10 is connected to a base end portion 10a. Tip 10b
Is formed, and the rib shape 13 is bent in a direction substantially perpendicular to the longitudinal direction of the rib shape 13, and the distal end portion 10 b is fixed to the outer panel 3.

An opening 5 is formed in the inner panel 2,
Through this opening 5, mounting of window glass elevating means (not shown) is performed. Finally, a door trim (not shown) is assembled so as to cover the opening 5 (see FIG. 10).

When the opening 5 is formed in the inner panel 2, as shown in FIG. 4, a part to be the reinforcing portion 10 is left in a state where the inner panel 2 and the base end portion 10a are continuous by press molding. The reinforcing portion 10 is formed integrally with the inner panel 2 by forming a cut in the periphery and punching out another portion that is not the reinforcing portion 10. Reinforcing part 10
Is formed with a rib shape 13 in which a valley 11 and a ridge 12 extend over a base end portion 10a and a front end portion 10b that are continuous with the inner panel 2, and as shown in FIGS. The shape 13 is bent toward the outer panel 3 with a predetermined radius of curvature in a direction substantially orthogonal to the longitudinal direction. A flange is formed at the distal end 10 b of the reinforcing portion 10, and the flange is fixed to the outer panel 3 by a sealer 15.

Next, the press molding method of the present invention will be described. In the press forming method of the present invention, a preliminary drawing is performed locally on a plate material, and a rib shape 13 is formed so that the portion subjected to the preliminary drawing is protruded in the pressing direction. It is bent in a direction substantially perpendicular to the rib shape 13 while extending in the direction. And
When the body of the vehicle is formed by assembling the inner panel 2 with the outer panel 3 as in the case of the door 1 of the vehicle described above, at the same time as or before or after performing the preliminary drawing on the inner panel 2 as the plate material. By forming cuts leaving the base end portion 10a, the reinforcing portion 10 continuous with the inner panel 2 is provided, and the rib shape 13 is formed.
Is formed, and the distal end portion 10b of the reinforcing portion bent toward the outer panel 3 is fixed to the outer panel 3. In this embodiment, a case where the above-described door of an automobile is formed will be described as a press forming method.

As shown in a perspective view in FIG. 2 and an end view in FIG. 3, first, a preliminary drawing is performed by press forming on a portion of the inner panel 2 which will be a reinforcing portion 10 later.
A concave portion (referred to as a fill portion 20) is formed. This reinforcement 10
The preliminary drawing of the fillet portion 20 is performed by adding the vertical wall portion 11 of the valley 11 to the portion that becomes the valley 11 of the rib shape 13 formed later.
a (see FIG. 8), and has a width substantially equal to the width of the valley 11.

In this embodiment, after the preliminary drawing of the pre-filled portion 20, as shown in FIGS. 4 and 5, the base portion 10a of the portion to be the reinforcing portion 10 of the inner panel 2 is left as it is. A notch is formed around the periphery of the base 10 by press molding and punched out to provide a reinforcing portion 10 continuous with the inner panel 2.

Next, as shown in FIGS. 6 and 7, the pre-filled portion 20 formed by preliminary drawing formed on the reinforcing portion 10 by press forming is projected in the pressing direction to form a valley 11, thereby forming the reinforcing portion. 10 from the proximal end 10a to the distal end 10b
A rib shape 13 in which the valleys 11 and the ridges 12 extend up to the portion forming the flange of
The valley 11 becomes the ridge 12 in a direction substantially orthogonal to the rib shape 13.
It is bent toward the outer panel 3 with a predetermined radius of curvature so as to be further inside, and further bent so as to be substantially parallel to the outer panel 3 so that the flange of the distal end 10 b can be fixed to the outer panel 3. When the reinforcing portion 10 is bent toward the outer panel 3 with a predetermined radius of curvature in a direction substantially orthogonal to the rib shape 13, first, as shown by the dashed line in FIG. 8, the base end portion 10a of the reinforcing portion 10 The bent portion 20 formed by the preliminary drawing is bent so as to be displaced toward the outer panel 3 (see a two-dot chain line in FIG. 8), and then the bent portion 20 is formed in the longitudinal direction of the rib shape 13 formed. Is stretched to finally form the vertical wall portion 11a of the valley 11 having the rib shape 13, as shown by the solid line in FIG.

The valley 11 is located inside the radius of curvature of the ridge 12 (see FIG. 7), and the pre-filled portion 20 that has been bent by the preliminary drawing is stretched to extend the vertical wall portion of the valley 11. 1
Even if the reinforcing portion 10 is bent at a predetermined radius of curvature in a direction substantially perpendicular to the rib shape 13 to form the rib 1a, a compressive stress in the length direction is generated in a portion inside the radius of curvature, and buckling is caused by wrinkles. There is no such occurrence (see FIG. 12), and the rib shape 13 can be bent in a good state.

When assembling the inner panel 2 and the outer panel 3, as shown in FIG. 1, the tip 10b of the reinforcing portion 10 is fixed to the outer panel 3 with a sealer 15.

As described above, according to the method of molding an automobile body according to the present invention, the reinforcing portion 10 is formed integrally with the inner panel 2 and the rib portion 13 is formed on the reinforcing portion 10.
Is formed, and can be bent without buckling toward the outer panel 3 side in a state having a predetermined radius of curvature in a direction substantially perpendicular to the longitudinal direction of the rib shape 13, so that the body assembly parts are omitted. In addition, the rigidity of the body can be reliably maintained.

[0028]

According to the first aspect of the present invention, preliminary drawing is performed locally on the plate material, and the portion subjected to the preliminary drawing is projected in the pressing direction to form a valley. By bending in the direction substantially perpendicular to the rib shape while extending in the longitudinal direction of the strip, the plate material on which the rib shape is formed is bent so as not to buckle so as to be substantially perpendicular to the longitudinal direction of the rib shape. And a press molding method capable of performing the method.

According to the second aspect of the present invention, a continuous reinforcing portion is provided by forming a cut in one panel while leaving a base end portion, and the reinforcing portion is reinforced at the same time as or before or after providing the reinforcing portion. Part is subjected to preliminary drawing, and a rib shape formed of valleys and ridges extending over the base end and the distal end of the reinforcing portion so that the part subjected to the preliminary drawing is projected in the pressing direction. While forming and extending in the longitudinal direction of the valley, it is bent in a direction substantially perpendicular to the rib shape, and the front end of the reinforcing portion of the one panel is fixed to the other panel together with the assembly of both panels. Thereby, a reinforcing member having a rib shape is formed integrally with one of the panels, and the reinforcing member can be bent without being buckled so as to be substantially perpendicular to the longitudinal direction of the rib shape. Provide Rukoto can. In addition to this, it is possible to provide a method of molding a body of an automobile, which can save the labor of assembling the body, reduce the manufacturing cost, and further increase the rigidity of the body.

According to the third aspect of the present invention, a continuous reinforcing portion is integrally provided on one of the panels, and the reinforcing portion is formed from a valley and a mountain extending over a base end and a front end thereof. The rib shape is formed and bent in a direction substantially perpendicular to the longitudinal direction of the rib shape, and the front end portion is fixed to the other panel, so that the labor for assembling the body is eliminated and the manufacturing cost is reduced. Thus, it is possible to provide a structure of an automobile body capable of further increasing the rigidity of the body.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view of a vehicle door according to the present invention.

FIG. 2 is a perspective view showing a state in which a pre-filled portion is pre-drawn on an inner panel.

FIG. 3 is an end view taken along line AA of FIG. 2;

FIG. 4 is a perspective view showing a state in which a reinforcing portion is formed on the inner panel from the state shown in FIG. 2;

FIG. 5 is an end view taken along line BB of FIG. 4;

FIG. 6 is a perspective view showing a state where a reinforcing portion formed on the inner panel is bent toward the outer panel from the state shown in FIG. 4;

7 is an end view taken along line CC of FIG. 6;

FIG. 8 is an explanatory view showing a state in which a pre-drawn portion formed by preliminary drawing on a reinforcing portion is bent toward the outer panel while being stretched.

FIG. 9 is a sectional view of an automobile door in which a conventional inner panel and outer panel are connected by a separate reinforcing member.

FIG. 10 is a perspective view of an automobile door in which a continuous reinforcing portion is provided integrally with the inner panel when forming the opening of the inner panel.

FIG. 11 is a perspective view showing a state in which a rib-shaped molding is first performed on a reinforcing portion of the inner panel.

12 is a cross-sectional view for explaining a state in which a valley is compressed and buckled by bending a reinforcing portion from the state of FIG. 11;

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Automobile door 2 Inner panel 3 Outer panel 5 Opening 10 Reinforcement part 10a Base end part 10b Tip part 11 Valley line 12 Mountain line 13 Rib shape 15 Sealer 20 Prefill part (preliminary drawing)

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI B62D 25/02 B62D 25/02 B

Claims (3)

[Claims] 1. A press forming method for forming a rib shape composed of a valley and a ridge on a plate material and bending the rib shape in a direction substantially perpendicular to the longitudinal direction of the rib shape, the method comprising: Stretching is performed, and the portion subjected to the pre-stretching is projected in the pressing direction to form a valley, and is bent in a direction substantially orthogonal to the rib shape while extending in the longitudinal direction of the valley. Press forming method. 2. A method of molding a body of an automobile in which an inner panel and an outer panel are assembled, wherein a continuous reinforcing portion is provided by forming a cut in one panel while leaving a base end portion, and the reinforcing portion is provided. Simultaneously with or before and after the provision of the pre-stretching on the reinforcing portion, and extending over the base end and the distal end of the reinforcing portion so that the portion subjected to the pre-stretching protrudes in the pressing direction. While forming a rib shape consisting of valleys and ridges, while extending in the longitudinal direction of the valley, bent in a direction substantially perpendicular to the rib shape,
A method for molding a body of an automobile, comprising: attaching a front end portion of a reinforcing portion of the one panel to the other panel together with assembling the two panels. 3. A structure of an automobile body comprising an inner panel and an outer panel, wherein a reinforcing portion continuous with one of the panels is provided integrally, and the reinforcing portion extends over a base end and a front end thereof. A body of an automobile, wherein a rib shape formed of extending valleys and ridges is formed, bent in a direction substantially perpendicular to the longitudinal direction of the rib shape, and a tip end portion is fixed to the other panel. Structure.