JPH0140682B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to bending applied when manufacturing a metal plate having ribs formed on the bottom surface for reinforcement, such as an exterior plate of a building. This relates to processing methods.

[Conventional technology]

This type of plate material is conventionally manufactured by the method shown in FIGS. 9-12.

First, as shown in FIG. 9, a horizontal strip 1 is taken along one edge of _{the metal plate 10 outside of the dotted line d 1 in FIG} . Take a longitudinal strip 3, and cut the strip 1
A notch portion 4 is provided by cutting out the area where the strip portion 3 and the strip portion 3 intersect. Next, as shown in FIG. 10, the band-shaped portion 3 is bent by, for example, press working to form a rib 31 having a chevron-shaped cross section with its apex at the dotted line _d3 , which is located at the center of the dotted line _d2 and the dotted line _d4 . Furthermore, as shown in FIG. 11, the side wall 11 is formed by bending the portion 1 outside the extension line of the bottom of the notch 4, indicated by the dotted line d1, along the dotted line _{d1 ,} for example, by press working. At this time, since a notch 41 derived from the notch 4 is formed in the side wall 11, a cutout 5 having a shape adapted to the notch 41 is abutted and welded as shown in FIG. It is occluded by fixation. In this way, ribs 31 extending from the side wall 11 are formed on the bottom surface 2.

[Problem that the invention seeks to solve]

In the above conventional method, the section 5 must be prepared separately from the metal plate 10, and the welding trace 5 must be prepared separately from the metal plate 10.
There were problems such as that the section 5 was exposed and the appearance was unfavorable, and that the section 5 and the side wall 11 around it were distorted by the welding heat.

[Means for solving problems]

As a means of solving the above-mentioned conventional problems, the present invention defines a portion of a metal plate that should become a side wall and a portion that should become a bottom surface, further defines a portion that should become a rib on the bottom surface, and a width of the portion that should become a rib. Cut out the part that should become the side wall with a predetermined width within the range of , form a welding margin, bend the part that should become the rib on the bottom surface to form the rib, and bend the part that should become the side wall. A side wall is formed by forming a side wall, and a welding margin is overlapped with the thus obtained rib or side wall, and spot welding is performed to fix the rib or side wall.

〔Example〕

A first embodiment of the present invention is shown in FIGS. 1-4.

For example, along one edge of a metal plate 10 made of steel, stainless steel, titanium steel, etc., a horizontal band 1 is drawn outward from the dotted line d ₁ in Figure 1, and then at right angles from the edge to the dotted line d ₂ , d. Vertical strip 3 surrounded by ₄
A square notch portion 4A having a predetermined width smaller than the width of the region and a predetermined length smaller than the length of the region in the region where the strip portion 1 and the strip portion 3 intersect. The band-shaped portion 3 is formed by providing a beak-shaped cut 4B reaching the intersection of dotted line _d1 and dotted line _d2 and the intersection of dotted line _d1 and dotted line _d4 from both inner corners of the notch 4A.
Welding allowances 61 and 62 are formed by forming a triangular shape at the end of the triangle and making a cut 6 from the apex of the triangle to the dotted line d ₁ (base).

The band-shaped portion 3 of the metal plate 1 formed in this manner is bent by, for example, press processing to form a rib having a chevron-shaped cross section with the dotted line _d3 located in the center between the dotted line _d2 and the dotted line _d4 as the ridgeline as shown in FIG. Form 31. At this time, the predetermined width of the notch 4A is such that both edges of the notch 4A are welded together.

Next, as shown in FIG. 3, the welding allowances 61 and 62 are bent vertically. The bending process of the welding allowances 61 and 62 may be performed simultaneously with the formation of the ribs. After vertically bending the welding allowances 61 and 62 in this manner, the side wall 11 is formed by vertically bending the strip portion 1 along the dotted line _d1 as shown in FIG. The thus formed side wall 11 has both edges in close contact with each other at the notch portion 4A and overlaps with the welding allowances 61 and 62. Therefore, the close contact portions of both edges are welded and the welding allowances 61 and 62 are welded.
Spot weld the parts. The spot welding referred to herein includes not only spot welding points but also welding points that are expanded into a planar shape. Note that the notches 4B extending from both inner corners of the notch portion 4A are made to have a shape that follows the cross-sectional shape of the rib 31 when the side wall 11 is formed. In this way, a product having ribs 31 continuous to the side walls 11 formed on the bottom surface 2 as shown in FIG. 8 is obtained.

A second embodiment of the invention is shown in FIGS. 5-7.

Similar to the first embodiment, a horizontal strip 1 is formed along one edge of _{the metal plate 10 outside of the dotted line d 1 in FIG} . Take a strip-shaped portion 3 in the direction, and in the area where the strip-shaped portion 1 and the strip-shaped portion 3 intersect, a square having a predetermined width smaller than the width of the region and a predetermined length smaller than the length of the region. Shape notch 4A
, and a dotted line d ₁ from both inner corners of the notch 4A.
A triangular notch 4B is provided at the intersection of the dotted line _d3 and the apex of the triangular notch 4B, that is, the dotted line
Dotted lines d _{2 and} d ₄ along dotted line d ₁ from the intersection of d ₁ and dotted line d 3
Welding allowances 61A and 62A are formed by making cuts 6A, 6A, 6B, and 6B up to the positions of , respectively. Note that a welding margin 1A is provided at one side edge of the notch portion 4A by extending the band-shaped portion 1.

The band-shaped portion 3 of the metal plate 10 thus formed is bent, for example, by press working, and _a dotted line d3 located in the center between dotted lines _d2 and dotted lines _d4 as shown in FIG.
A rib 31 having a chevron-shaped cross section with a ridge line is formed. At this time, the predetermined width of the notch 4A is such that the welding margin 1A provided on one side edge of the notch 4A of the band-shaped portion 1 overlaps the other side edge.

Next, as shown in FIG. 7, the strip portion 1 is vertically bent to form the side wall 11. At this time, welding allowance 6
1A.62A is polymerized along the outer surface of rib 31 as shown in FIG. Further, the welding allowance 1A overlaps the other edge of the notch 4A as described above. In addition, in the state where the side wall 11 is formed, welding 61A, 62
A is placed along the outer surface of the rib 31. side wall 1
1 is formed, and the welding allowances 61A and 62A are aligned along the outer surface of the rib 31, and then the welding allowance 1A and the other edge, and the welding allowances 61A and 62A and the outer surface of the rib are spot welded.

In this way, a rib 31 extending from the side wall 11 is formed on the bottom surface 2 as shown in FIG. 8, and an assembly is obtained.

[Effect]

Since the present invention has the above configuration, only one welding mark 6A appears in the appearance in the case of the first embodiment, and none at all in the case of the second embodiment. The welding allowances 61, 62, 61A, and 62A are overlapped and spot welded to the outer surface of the side wall 11 or the rib 31. In this way, for example, an exterior plate 10A as shown in FIG. 8 is manufactured in which the bottom surface 21 on which a plurality of ribs 31 are formed is surrounded by side walls.

〔Effect of the invention〕

Therefore, in the present invention, a product with good appearance can be obtained with only one or no welding marks appearing on the outside, and the welded part has a double structure consisting of the welding allowance and the side wall or rib, so it has high strength. It is large, and welding distortion is less likely to occur. Moreover, there is no need to separately prepare sections or the like.

[Brief explanation of drawings]

1 to 4 relate to a first embodiment of the present invention, in which FIG. 1 is a partial plan view of a metal plate, and FIG.
The figure is a partial perspective view with ribs formed, FIG. 3 is a partial perspective view with the welding allowance bent, FIG. 4 is a partial perspective view with side walls formed, and FIGS.
FIG. 8 relates to the second embodiment of the present invention, FIG. 5 is a partial plan view of the metal plate, FIG. 6 is a partial perspective view of the metal plate with ribs formed, and FIG. 7 is a partial perspective view of the metal plate with side walls formed. FIG. 8 is a perspective view of the product, FIGS. 9 to 12 show conventional examples, FIG. 9 is a partial plan view of a metal plate, and FIG. 10 shows a rib. FIG. 11 is a partial perspective view of the formed state, FIG. 11 is a partial perspective view of the side wall formed, and FIG. 12 is a partial perspective view of the section welded together. In the figure, 1... the part that should become the side wall, 2... the part that should become the bottom surface, 3... the part that should become the rib, 4
... Notch part, 10 ... Metal plate, 11 ... Side wall,
21... Bottom surface, 31... Rib, 61, 62, 61
A, 62A...Welding allowance.

Claims (1)

[Claims] 1. Take a horizontal band-shaped part along one edge of the metal plate, then take a vertical band-shaped part at right angles from the edge, and in the area where the horizontal band-shaped part and the vertical band-shaped part intersect, A notch having a predetermined width smaller than the width of the area is provided, and a welding allowance is provided continuous to the notch on either the horizontal band-like part side or the vertical band-like part side, and A strip-shaped portion in the direction is bent to form a rib having a chevron-shaped cross section, and a strip-shaped portion in the lateral direction is bent to form a side wall, and a welding allowance is superimposed on the rib or side wall thus obtained. A bending method characterized by fixing by spot welding.