JPH07275965A - Manufacture of panel material having hole - Google Patents

Abstract

PURPOSE:To reduce the number of manufacturing processes of a panel having hole and to improve the productivity. CONSTITUTION:At the time of applying a first process for forming one pair of flange parts 18, 20 having roundness of a projecting base part by projecting mutually in the opposite side to an apron in a front fender apron 14 with deep- drawing and a second process for punching a part between both flange parts while remaining the forming position of the flange parts 18, 20 with punching, the hole 16 can be formed on the apron 14 without turning over the apron 14 on the way at the two process while reducing one process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a hole through which a long body such as a wiring harness used in an automobile can be inserted and which can protect the inserted long body from damage due to contact with a hole edge. The present invention relates to a method for manufacturing a perforated panel material.

[0002]

2. Description of the Related Art When arranging and arranging a long body such as a wiring harness, it is often necessary to insert a panel material. For example, when a wiring harness used in an automobile is arranged and arranged along a predetermined path, a hole may be provided in a body panel and the wiring harness may be inserted through this hole. In this case, various protective measures are taken in order to prevent the wiring harness from being damaged by burrs or edges at the periphery of the hole formed in the body panel. An example thereof is disclosed in Japanese Utility Model Laid-Open No. 59-50523, and the structure disclosed in this publication will be described below.

As shown in FIG. 8, a thin plate-like apron 70 as a panel material is provided with a substantially oval hole 72 having a major axis in the vehicle front-rear direction, and a wiring harness 75 is provided in this hole 72. It is inserted diagonally. Also,
In this structure, when the wiring harness 75 is inserted into the hole 72, the wiring harness 75 and the apron 7 are
Flange portions 70A and 70B are formed at portions (front and rear edge portions of the hole 72) that are in contact with 0. The flange 7
The bending directions of 0A and the flange portion 70B are opposite to each other and the wiring harness 75 is not arranged. Further, in order to prevent the wiring harness 75 from being rubbed and damaged, the flange portions 70A, 70B are prevented.
Is formed so as to have a rounded shape (hereinafter, this portion is referred to as "bent portion 70C, 70D").

Here, the above-mentioned flange portions 70A, 70
B is manufactured through the following three steps.

First, in the first step shown in FIG. 9A, a substantially elliptical hole 72 is formed in the apron 70 by punching.

Next, in a second step shown in FIG. 9 (B), the wiring harness 75 of the bent portion 70C is disposed at one hole edge portion in the major axis direction of the substantially oval hole 72 by flange processing. The flange portion 70A is formed by bending in the plate thickness direction so that the side surface is rounded.

Then, after the apron 70 is turned upside down so as to be turned upside down, a second step is performed in a third step shown in FIG. 9C.
The flange portion 70A is formed by the flange processing similar to the step so that the other edge of the substantially elliptical hole in the major axis direction is rounded so that the surface of the bent portion 70D on the side where the wiring harness 75 is disposed is rounded. The flange portion 70B is formed by bending in the thickness direction on the non-open side.

[0008]

However, in the case of the method for manufacturing a perforated panel material disclosed in the above publication, 3
Process is required, and the apron 70 is added immediately before the third process.
Had to be reversed. As a result, the productivity of the perforated panel material has been reduced.

In particular, when the perforated panel material is an automobile body panel, it is necessary to invert the apron 70 immediately before the third step. Therefore, all three steps are included in the series of steps for manufacturing the body panel. Could not be included. That is, the last one step remains, requiring a dedicated step and mold. As a result, the productivity of the body panel is reduced, including the need for extra man-hours and mold cost.

In view of the above facts, an object of the present invention is to obtain a method for manufacturing a perforated panel material which can improve the productivity of the perforated panel material.

[0011]

A method of manufacturing a perforated panel material according to the present invention comprises a pair of projections, which are formed by drawing and projecting the panel materials to opposite sides of the panel material surface, and projecting root portions having a rounded shape. It is characterized by having a first step of forming a wall and a second step of punching out a portion between the two, leaving a portion where the pair of protruding walls are formed by punching.

[0012]

In the method for manufacturing a perforated panel material according to the present invention, a first pair of projecting walls are formed on the panel material by drawing to project opposite to each other with respect to the panel material surface, and projecting root portions are rounded. Since it has a step and a second step of punching out the portion between the two parts by punching, leaving a portion where the pair of protruding walls are formed, for example, inserting a long body such as a wiring harness described in the prior art. Further, a hole is formed in the panel material that can protect the inserted long body from damage due to contact with the protruding root portion. Therefore, according to the present invention, the hole can be formed in the panel material in two steps, and the number of steps can be reduced as compared with the conventional technique.
This improves the productivity of the perforated panel material.

Further, when the panel material is an automobile body panel, the body panel is manufactured because there is no need to invert the body panel to form holes according to the present invention by drawing and punching. The holes can be formed in a series of processes. Also in this respect, the productivity of the body panel is improved.

[0014]

EXAMPLE An example of a method of manufacturing a perforated panel material according to the present invention will be described with reference to FIGS. In these figures, arrow FR indicates the vehicle front side, arrow IN indicates the vehicle width direction inner side, and arrow UP indicates the vehicle upper side.

FIG. 2 shows the front side of the vehicle body forming a part of the engine room. As shown in this figure, the front fender apron 14 as a panel material is provided with a substantially elliptical hole 16 having a major axis in the vehicle front-rear direction.

FIG. 1 is an enlarged view of the periphery including the hole 16, and FIG. 3 shows a sectional structure taken along line 3-3 of FIG. As shown in these figures, hole 1
The vehicle rear portion of the six peripheral portions is bent inward in the vehicle width direction in which the wiring harness as a long body is not arranged, and forms a flange portion 18 as a protruding wall.
Here, the bent portion 52 as the protruding root portion has a rounded surface on the side where the wiring harness 30 is disposed (see FIG. 3). The tip of the flange portion 18 has a hole 1
6. The small flange portion 22 is bent inward toward the inner side by a small size, and the small flange portion 22 left in the punching process described later remains.

On the other hand, the vehicle front part of the peripheral portion of the hole 16 is bent in the plate thickness direction to the outside in the vehicle width direction where the wiring harness is not arranged to form a flange portion 20 as a protruding wall. Here, the bent portion 54 as the protruding root portion,
Similar to the bent portion 52, the surface on the side where the wiring harness 30 is disposed is rounded (see FIG. 3). Also,
The tip portion of the flange portion 20 is also bent toward the inside of the hole 16 by a small dimension, and the small flange portion 24 left in the punching process described later.
Remains.

No flanges are formed on the edge portions 26 and 28, which are the upper and lower peripheral portions of the hole 16 described above.

The operation of this embodiment will be described below through the description of the method of manufacturing the front fender apron 14 described above. Note that, for convenience of description, not the method of manufacturing the entire front fender apron 14, but only the peripheral portion including the hole 16 will be described.

First, in a first step shown in FIG. 4A, a predetermined uneven shape is formed on the front fender apron 14 by drawing.

The upper mold 32 and the lower mold 34 used in the drawing process in the first step will be briefly described.

The upper die 32 is made of a metal such as cast iron, and has a concave portion 32D and a convex portion 32C on the lower surface as shown in FIG. 4 (A). The correspondence between the parts will be described with reference to FIG. 5, which is a view taken along the line P in FIG. 4 (A). The bottom surface of the recess 32D corresponds to the vehicle front portion of the substantially elliptical hole that will later become the hole 16, and the projection The bottom surface of the portion 32C corresponds to the vehicle rear portion of the substantially elliptical hole. The hole edge portions 32B and 32A are rounded.

A lower mold 34 corresponding to the upper mold 32 is also provided.
Is made of metal such as cast iron. As shown in FIG. 4A, the recess 34C is formed so that the upper mold 32 and the lower mold 34 are engaged with each other with a gap corresponding to the thickness of the front fender apron 14 interposed therebetween. And the convex portion 34D are formed on the upper surface. Also here, the hole edge portions 34B and 34A are rounded.

Then, the front fender apron 14 is arranged between the upper mold 32 and the lower mold 34, and pressure is applied from above and below. As a result, the front fender apron 14 is formed with the concave portions 14A and the convex portions 14B, and the bent portions 52 and 54 corresponding to the protruding root portions of the outermost protruding walls of the front fender apron 14 are the surfaces on the side where the wiring harness 30 is disposed. Are formed to be rounded.

Next, in a second step shown in FIG. 4B, a hole 16 as a punched portion having a predetermined shape is formed in the front fender apron 14 by punching.

The upper die 36 and the lower die 38 used in the punching process in the second step will be briefly described here.

The lower die 38 is made of metal such as cast iron and has a recess 38A on the upper surface as shown in FIG. 4 (B). The opening of the recess 38A corresponds to a portion between the protruding walls, except for the outermost protruding wall forming portions of the recess 14A and the protruding portion 14B of the front fender apron 14. The “concave portion 14” used in the description of claim 2
"A, a portion between the projecting walls excluding the formation site of each projecting wall on the outermost side of the convex portion 14B" refers to a part of the projecting wall in FIG. In the formed vehicle front portion and vehicle rear portion, the inner portions 56, 5 of the contour lines 46, 48 that are inward by more than the thickness of the front fender apron 14 than the outer contour lines 42, 44 of the protruding wall.
8 and the inner portion 60 of the elliptical contour lines 40 and 50 which are the opening shape of the holes formed in the vehicle front-rear center portion where the protruding wall is not formed. Further, the step portion 3 that supports the outermost protruding wall of the recess 14A.
8B and a step portion 38C that supports the outermost protruding wall of the convex portion 14B are formed at both ends in the major axis direction of the opening of the concave portion 38A.

Further, the upper mold 36 corresponding to the lower mold 38.
Is made of metal such as cast iron and has a convex portion 36A and a concave portion 36B on the lower surface as shown in FIG. 4 (B). Figure 4
In FIG. 7 which is an arrow view of FIG. 4B and FIG. 4B, the convex portion 36A has a shape in which the concave portion 38A has an R line arrow shape.
The shape is substantially elliptical, which is the same as the shape of the Q line arrow, and the one end is formed into a sharp blade shape by sloping vertically from one end to the other end in the major axis direction. Further, the concave portion 36B has a height S of the protruding wall top 24 so that the protruding wall top 24 (which becomes a small flange portion) 24 and the upper mold 36 do not come into contact with each other during pressure bonding described later.
The depth T of the concave portion 36B is set to be larger than that of the concave portion 36B, and 36C located immediately above the projecting wall top 24 is
And a peripheral portion 36D slightly protruding outward from 36C.

Then, the front fender apron 14 is arranged between the upper mold 36 and the lower mold 38 and pressure-bonded from above and below. As a result, the central portion of the front fender apron 14 corresponding to the contour lines 46, 50, 48, 40 of the substantially elliptical recess 38A shown in FIG. 6 is punched out, and the substantially oval hole 16 is formed in the front fender apron 14. To be done.

Further, flange portions 18, 20 as projecting walls bent to opposite sides in the plate thickness direction are formed at the vehicle rear portion and the vehicle front portion of the peripheral portion of the hole 16, and the tip ends of the flange portions 18, 20 are formed. Small flange portions 22 and 24 are formed in the.

As shown in FIG. 3, the wiring harness 30 is provided in the holes 16 formed in the above process with the flange portions 18, 20.
When the wiring harness 30 is slidably inserted into the side where the wiring harness 30 is not formed, the position of the wiring harness 30 may shift due to vibration of the vehicle body or the like, but even if the wiring harness 30 contacts the bent portions 52 and 54 of the hole 16, the bent portion Since the surfaces of the wiring harnesses 52 and 54 on the side where the wiring harness 30 is disposed are sufficiently rounded, it is possible to prevent the wiring harness 30 from being rubbed and damaged. That is, according to the manufacturing method of the present embodiment, the hole that can protect the wiring harness 30 inserted therein from damage due to contact with the bent portions 52 and 54 can be provided in two steps, which is one step less than the conventional method. .

Further, since it is not necessary to invert the front fender apron 14 during the process, all three steps can be included in a series of processes for manufacturing the front fender apron 14. Therefore, extra man-hours and mold cost can be reduced, and the productivity of the front fender apron 14 can be improved.

In the present embodiment, the case where the small flange portions 22 and 24 remain by the punching process in the second step is shown, but these small flange portions 22 and 24 are not necessary constituent elements and will be small in the future. The present invention can also be applied to the case where punching is possible without leaving the flange portions 22 and 24.

In the present embodiment, the case where the front fender apron 14 is formed with the projecting walls (flange portions 18 and 20) projecting to the opposite sides in the plate thickness direction in the drawing process in the first step has been described. The projecting wall does not need to project in the plate thickness direction of the front fender apron 14, and when the position of the elongated body such as the wiring harness inserted through the front fender apron 14 is deviated, the elongated body forms the small flange portions 22, 24. The present invention can be applied as long as the bending angle of the protruding wall with respect to the front fender apron 14 is set to such an extent that it does not come into contact with.

Further, in the present embodiment, the holes formed in the panel material are shown in the case where the openings thereof are substantially elliptical, but the shape of the openings of the holes is other than substantially elliptical, for example, substantially circular or substantially circular. The present invention can be applied even to a rectangular shape.

Further, in this embodiment, the wiring harness is used as a vehicle body panel material (front fender apron 1
Although the case where the wiring harness is inserted from the inside of the front of the vehicle toward the outside of the rear of the vehicle is shown in 4), the wiring harness is paneled in the other directions, for example, from the outside of the front of the vehicle to the inside of the rear of the vehicle or the vertical direction of the vehicle. The present invention can be applied to the case where the material is inserted.

Further, in this embodiment, the flat portion 14C is provided between the convex portion 14B and the concave portion 14A formed in the drawing process of the first step shown in FIG. 4A, but the flat portion 14C is formed. The provision and the shape of the flat portion 14C may be arbitrary.

[0038]

In the method of manufacturing a perforated panel material according to the present invention, a pair of projecting walls are formed by drawing to the panel material so as to project toward opposite sides of the panel material surface, and the projecting root portions are rounded. And the second step of punching out a portion between the two by leaving a formation site of the pair of projecting walls by punching, so that the length of the wiring harness or the like described in the above embodiment is It is possible to form a hole through which the length body is inserted and which can protect the inserted long body from damage due to contact with the projecting root portion in two steps, and to reduce one step compared with the conventional technique. You can

This has the excellent effect that the productivity of the perforated panel material can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a perforated panel material of this embodiment.

FIG. 2 is a perspective view showing an arrangement of a perforated panel material of FIG. 1 in a vehicle body.

FIG. 3 is a sectional view taken along line 3-3 when a wiring harness is inserted through the perforated panel material of FIG.

FIG. 4 is a diagram showing a method for manufacturing a perforated panel material according to the present embodiment.

5 is a view on arrow P in FIG. 4 (A).

FIG. 6 is a view on arrow Q in FIG. 4 (B).

FIG. 7 is a view on arrow R in FIG. 4 (B).

FIG. 8 is a perspective view showing a conventional perforated panel material.

FIG. 9 is a diagram showing a conventional method for manufacturing a perforated panel material.

[Explanation of symbols]

 14 front fender apron (panel material) 16 hole (punching part) 18 flange part (protruding wall) 20 flange part (projecting wall)

Claims (1)

[Claims] 1. A first step of forming a pair of projecting walls on a panel material that are opposite to each other with respect to the panel material surface by drawing, and forming a pair of projecting walls whose projecting root portions are rounded, and the pair of projecting walls by punching processing. And a second step of punching out a portion between the two, leaving the formation site of the.