JPS6364273B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a container using a corrugated heat sink with an edge plate.

Conventionally, there have been containers of this type as shown in FIGS. 1 and 2.

Fig. 1 shows a corrugated heat sink with an edge plate used in the manufacture of containers, and Fig. 2 shows a container using the shaped material of Fig. 1. In the figure, 1 is a corrugated heat sink, edge plates 2, 3
are placed at the lower part of both side edges, and fin-like protruding portions 4 are provided protruding from the side edges 2 and 3 at predetermined intervals A, that is, at pitches A. The curled portion 2A of the edge plate 2 is for placing the lid of a container (not shown), and the right angle bent portion 3A of the edge plate 3 is for welding the bottom plate of the container (not shown). For example, in manufacturing a liquid tank with heat dissipation fins such as a transformer case, a thin sheet material with a thickness of approximately 1 mm is bent into a corrugated shape at pitch A to form a fin-like overhang 4, as shown in Fig. 1. Both ends of this fin-shaped overhang 4 are crushed, for example, by pressing, and the crushed parts are joined by welding or the like and sealed to form the corrugated heat sink 1, and then a plate thickness of 3 is applied to the lower part of both side edges.
The edge plates 2 and 3 of about mm are laid down, and the lap joints of the overlap margin B are welded to form a shaped member, that is, a corrugated heat sink with edge plates. Next, as shown in FIG. 2, this corrugated heat sink with an edge plate is placed at multiple locations parallel to the fin-shaped projecting portion 4, for example, at the corner portions 5, 6, 7, and 8.
After the side plate of the container is formed by bending at a predetermined bending radius, the starting end and the end of the bending are welded to manufacture the container.

Next, Fig. 3 shows a conventional corrugated heat sink with an edge plate, and Fig. 4 shows a corrugated heat sink with an edge plate formed as shown in Fig. 3, which is bent into a box shape as shown in Fig. 2. Fig. 3 shows a cross-sectional view taken along the line - - of the side plate longitudinal joint of the container.

In the conventional welding method, first, when welding the edge plates 2, 3 and the corrugated heat sink 1 in a flat state with the overlap B, as shown in FIG. Starting end 2 of each of plates 2 and 3
A and 3a are set and welded at different angles, and then, as shown in FIG. 4, the folding start end 1a and the bending end 1b are overlapped so that they are on the outside and inside of the container, respectively, and the above-mentioned bending start ends are A corner portion formed by the end surface of the portion 1a and the surface of the bent end portion 1b was defined as a weld line 1c. in this case,
By making the overlapping portion 1d having an overlapping margin D larger than the cumulative error caused by the pitch A of the fin-like projecting portion 4, as shown in FIG. 4, this cumulative error can be absorbed by the overlapping margin D. I was getting used to it. On the other hand, since the bending starting end 1a of the corrugated heat sink 1 and the starting ends 2a, 3a of the edge plates 2, 3 have different configurations as shown in FIG. 3, the side plates of the container are longitudinally welded. At the same time, each starting end 2 of the edge plates 2 and 3
The welding line 2c and the corresponding welding line 3c as shown in FIG. 4, which are formed by butting together the end portions 2b and 3b, respectively, are formed before or after welding the welding line 1c of the corrugated heat sink 1. It was necessary to weld, and it was not possible to weld at the same time.

As explained above, in conventional vertical seam welding, the welding line 1c of the corrugated heat sink 1 and the welding lines 2c, 3c of the edge plates 2, 3 are not in the same straight line, so it is difficult to automatically weld them at the same time. There was a drawback.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and the welding line 1c of the corrugated heat sink 1 is welded so that the weld lines 2c, 3c of the edge plates 2, 3 are in the same straight line. The present invention aims to provide a container manufacturing method that facilitates automation of longitudinal seam welding of container side plates using a corrugated heat sink with an edge plate, such as a liquid-filled tank.

An embodiment of the present invention will be described below with reference to FIGS. 5 and 6.

FIG. 5 shows a method of welding a corrugated heat sink and an edge plate according to an embodiment of the present invention, and FIG. 6 shows a corrugated heat sink with an edge plate formed as shown in FIG. This figure shows a cross-sectional view taken along the line ``--'' of the vertical joint of the side plate of a container formed by bending it into a box shape, and the same reference numerals as in FIGS. 3 and 4 indicate the same or equivalent parts, and the details are shown below. omit detailed explanation. In addition, in FIG. 5, Dc is a section provided in the longitudinal direction of the bending start end of the edge plate where no welding is performed, and has a value close to the overlapping margin D above the road. In addition, in Fig. 6, 2cR is the bending start end 1a and the bending end 1a.
The start end 2a and the end end 2 of the edge plate 2 are aligned so that the corner weld line 1c formed by
This is the welding line formed by b and this welding line 2
The starting end 3a and the ending end 3b of the edge plate 3 correspond to cR.
A weld line 3cR is formed.

In the above configuration, according to one embodiment of the present invention, when welding the corrugated heat sink 1 and the edge plates 2 and 3 in a flat state, the corrugated heat sink 1 is bent as shown in FIG. The starting end 1a and the starting ends 2a, 3a of the edge plates 2, 3 are set so as to be in the same straight line, and the overlapping margin B is welded, and then this is bent into a box shape to form a container. According to this method, as shown in FIG. 6, the vertical joint of the side plate of the container is formed by a corner weld line 1c formed by the bending start end 1a and the bending end 1b, and the start end of the edge plates 2 and 3. Part 2a,
Since the welding lines 2cR and 3cR formed by the welding line 3a and the end portions 2b and 3b form the same straight line, it is extremely easy to automatically weld the welding lines 1c, 2cR and 3cR at the same time.

In addition, before welding the vertical joints of the side plates of the container, the corrugated heat sink 1
In order to overlap the above-mentioned bending start end 1a and bending end 1b with the overlap distance D, when welding the corrugated heat sink 1 and the edge plates 2, 3 in a flat plate shape, the bending start end 2a , 3a are left unwelded by the difference between the bent end portion 1b of the corrugated heat sink 1 and the edge plate end portions 2b and 3b, that is, the width Dc which is approximately close to the overlapping margin D of the corrugated heat sink 1. above is necessary. Furthermore, the welding between the corrugated heat sink 1 and the edge plate at the overlapping margin D between the bending start end 1a and the bend end 1b of the waveform heat sink 1 may be performed either before or after welding the longitudinal joints of the side plates. good.

In addition, since the plate thickness and joints are different between the lap joint and butt joint on the longitudinal seam weld line of the side plate, welding conditions such as arc current, arc voltage, welding speed, etc. for arc welding may be changed for each joint. It may be necessary.

As explained above, according to an embodiment of the present invention, the lower portions of both side edges of the corrugated heat sink are arranged such that the bending start end of the corrugated heat sink and the start end of the edge plate are in the same straight line in the flat plate shape. The edge plates are laid with a predetermined overlap margin, and this lap joint is folded to extend the edge plate from the overlapping area away from the starting edge of the edge plate by a value approximately equal to the discrepancy between the end edge and the end edge of the edge plate. By welding up to the end of the edge plate, when further bending the corrugated heat sink with edge plate into a box shape and vertically welding the side plate of the container,
The corner weld line formed by overlapping the bending start end and the bend end of the corrugated heat sink and the weld line formed by butting the edge plate start end and end end on the same straight line. This has the great effect of easily automating vertical joint welding of side plates of containers using corrugated heat sinks with edge plates.

In the above example, when bending a corrugated heat sink with an edge plate into a box shape, one corrugated heat sink with an edge plate is bent at four points parallel to the fin-like overhang, and the side plates are longitudinally welded at one point. However, by bending a plurality of the above-mentioned corrugated heat sinks with edge plates at multiple points, the bending start end of one plate and the bending end of the other plate are bent between different waveform heat sinks with edge plates. They may be combined to form one container by performing vertical seam welding at multiple locations.

Further, in the above embodiment, a method for manufacturing a container such as a liquid-filled tank has been described, but the method for manufacturing a container according to the present invention can also be applied to any container using a corrugated heat sink with a rim plate other than the above-mentioned liquid-filled tank. This provides the same effects as the above embodiment.

As described above, according to the present invention, in manufacturing a container such as a liquid tank having a corrugated heat sink with an edge plate as a side plate, vertical seam welding of the side plate can be performed on the same straight line over the entire length. According to
Automatic welding can be easily performed, and as a result, products of high quality and low cost can be obtained, which is a great effect.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a corrugated heat sink with an edge plate used in the manufacture of containers; Fig. 2 is a perspective view showing an example of a container using the corrugated heat sink with an edge plate shown in Fig. 1;
The figure shows a front view and a side view of a conventional corrugated heat sink with an edge plate, Fig. 4 is an enlarged longitudinal cross-sectional view of the main part showing a conventional side plate longitudinal weld joint, and Figs. 5 and 6.
FIG. 3 shows an embodiment of the present invention, respectively.
FIG. 4 is a diagram corresponding to each of FIG. DESCRIPTION OF SYMBOLS 1... Corrugated heat sink, 2, 3... Edge plate, 4... Fin-like protruding portion, 1a... Bending start end of the waveform heat sink, 1b... Bending end portion of the waveform heat sink, 1d...
...Overlapping parts of corrugated heat sinks, 2a, 3a... Starting ends of edge plates, 2b, 3b... Ending parts of edge plates, 1c...
Corner weld lines 2c, 2cR, 3c, 3cR formed by the end face of the bending start end 1a and the surface of the bending end 1b of the corrugated heat sink, 2c, 2cR, 3c, 3cR... each start end 2a, 3a of the edge plates 2, 3 and the welding lines formed by butting each end portion 2b, 3b, A...pitch, B, D...
...Overlapping margin, Dc...A section provided in the longitudinal direction of the bending start end of the edge plate where no welding is performed.

Claims (1)

[Claims] 1. In a method for manufacturing a container using a material formed by joining edge plates to both side edges of a corrugated heat sink in which a large number of fin-like protrusions are formed on a thin sheet material at predetermined intervals, the above-mentioned corrugated heat sink The edge plate is placed at the lower part of both side edges of the corrugated heat sink with a predetermined overlapping margin so that the starting end of the folded edge plate and the starting edge of the edge plate form the same straight line, and this lap joint is connected to the corrugated heat sink. A corrugated edge plate is formed by welding the section from the overlapping part away from the starting end of the edge to approximately the terminal end of the edge plate by a value approximately equal to the discrepancy between the bent end of the heat sink and the end of the edge plate. By forming a heat sink, when the corrugated heat sink with edge plate is bent into a box shape and the side plate of the container is longitudinally welded, the bending start end and the bending end of the waveform heat sink are overlapped to form the shape. A method for manufacturing a container, characterized in that a weld line of a corner portion formed by the edge plate and a weld line formed by butting the starting end and the ending end of the edge plate are provided on the same straight line.