JPH0675779B2 - Method of joining strip metal plates - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for joining strip-shaped metal plates, and more particularly to a joining method for joining flexible strip-shaped metal thin plates.

[Prior art]

As a method of joining the strip-shaped metal plates, there are a method of superposing the strip-shaped metal plates and a method of joining them by abutting.

As shown in FIG. 5 (a), in the conventional lap joining method, the strip metal plate 70 and the strip metal plate 72 are superposed,
The joining surface 73 is joined by a double-sided adhesive tape or is fused by ultrasonic waves (FIGS. 4 and 6 of JP-A-59-24526).

Further, FIG. 5 (b) is a perspective view showing a conventional butt joining method for band-shaped metal plates. As shown in FIG. 5 (b), the end portions of the strip-shaped metal plates 70, 72 are butted, and the butted joint portion 75 is joined by the upper and lower single-sided adhesive tapes 76, 76 (JP-A-59-24526). (Fig. 2).

[Problems to be solved by the invention]

However, according to the conventional joining method of the band-shaped metal plates as shown in FIG. 5 (a), since there is a step at the joining portion, it is not possible to make smooth contact with the pass roller or the like. In addition, the thickness of the joining portion is larger than the thickness of the strip plate, and the overlapping portion is often not joined over the entire surface, so that the overlapping portion may be turned over during the transportation of the strip plate. In addition, there is a problem of contact with other objects during transportation in the process. Further, when there is a surface treatment step of the strip-shaped metal plate using the treatment liquid in the process, when the strip-shaped metal plate passes through the treatment liquid, foreign matter such as the treatment liquid enters the gap of the overlapping portion, In some cases, it may cause quality defects in the subsequent process. Moreover, various problems occur in the surface treatment process of the strip-shaped metal plate. For example, in the photosensitive layer coating step in lithographic printing plate manufacturing,
The coating device must be retracted to prevent damage when the joint portion of the strip-shaped metal plates passes. Further, such a superposed joint surface 73 has a step, which adversely affects the coating state and causes poor quality.

Further, as shown in FIG. 5 (b), in the joining method by abutting, joining is performed by the single-sided adhesive tapes 76, 76, so that the joining portion 75 has a step difference in thickness due to the tapes 76, 76. This step causes a problem similar to the problem in the lap joining method shown in FIG. In particular, in the case of this method, the tapes 76, 76 of the abutting portion are displaced by the edge of the strip plate of the abutting portion while being conveyed by a pass roller or the like during the process, so that the strength becomes weak and the problem of easy cutting occurs. There was a point. Furthermore, the strip-shaped metal plates 70, 72 are
Bending stress is applied when passing through the pass roller, and the bending stress easily causes breakage in the joint portion 75. In particular, it occurs remarkably when a thin strip-shaped metal plate of 0.1 mm to 0.2 mm is used or when there is a large difference in thickness between the two strip-shaped metal plates to be joined.

The present invention has been made in view of the above circumstances, and proposes a method for joining strip-shaped metal plates that does not break or have a bad influence on the coating process during the transport process and the coating process of the strip-shaped metal plates. The purpose is to do.

[Means for solving problems]

The present invention is to weld aluminum strip metal plates having a thickness of 0.1 mm to 0.5 mm by superposing them on each other so that the overlap margin is about 0.5 mm, rolling the welded joint, and welding the welded joint. It is characterized in that both ends are trimmed.

[Action]

According to the method for joining strip-shaped metal plates according to the present invention, the plate thickness is 0.
Aluminum strip-shaped metal plates of 1 mm to 0.5 mm were overlapped with each other so that the overlap margin was about 0.5 mm, and the overlapped portions were welded and joined. Therefore, the tensile strength of the welded joint between the thin strip-shaped metal plates made of aluminum is improved. Further, by rolling the welded joint, the step difference in the welded joint was eliminated. Furthermore, by trimming both ends of the welded joint, it is possible to prevent stress concentration from occurring in the welded joint during the transportation of the strip-shaped metal plate.

〔Example〕

Hereinafter, preferred embodiments of a method for joining strip-shaped metal plates according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view of a method for joining strip-shaped metal plates according to the present invention. As shown in FIG. 1, the strip-shaped metal plate 10 is rewound from the roll 12, rolled on the pass roller 14, and conveyed to the joining device 16. The precut device 18 of the joining device 16 includes cutters 20 and 20, and the tip portion 10A of the strip-shaped metal plate 10 has a precut device 18
The rear end 22 of the strip-shaped metal plate 22 that is cut and joined by
It is formed so that it can be accurately matched with A. still,
The front end portion 10A of the strip-shaped metal plate 10 to be rewound is directly the strip-shaped metal plate 2
The pre-cutting device 18 is not used when the rear end 22A of 2 can be accurately butted.

A welding device 24 is provided downstream of the precut device 18, and the welding device 24 includes clamps 26 and 28 and a welding torch 30. The clamp 26 holds the front end 10A of the strip metal plate 10, the clamp 28 holds the rear end 22A of the strip metal plate 22, and the strip metal plate 10 and the strip metal plate 22 are butted against each other. The TIG arc welding method is adopted for the welding torch 30, and in addition to this welding torch 30, MIC arc welding, gas welding,
Alternatively, laser welding using CO ₂ , YAG or the like may be used. The welding torch 30 melts and welds the end portions 10A, 22A of the strip-shaped metal plates while moving in the width direction of the strip-shaped metal plates 10, 22 from above the abutting portion. When the thickness of the strip-shaped metal plates 10 and 22 is 0.3 mm or less, the strip-shaped metal plates 10 and 22 are easily melted, and the strip-shaped metal plate ends 10A and 22A are slightly overlapped and welded. It

A rolling device 32 is provided after the welding device 24.
32 is composed of a rolling roller 34 and a back bar 36, and the welding portion 40 between the strip-shaped metal plate 10 and the strip-shaped metal plate 22 is rolled by the operation of the rolling roller 34.

Further, an edge trimming device 42 is provided at the subsequent stage of the rolling device 32, and the pair of die sets 4 of the edge trimming device 42 are provided.
The welded portions 40 of the strip-shaped metal plates 10, 22 are moved between 4 and 44, and both ends 4 of the welded portions 40 of the strip-shaped metal plates 10, 22 are moved as shown in FIG.
6 and 46 are trimmed. Trimming both ends 46, 46 positions the die sets 44, 44 in the width direction of the welded portion 40,
This is performed by punching including the strip-shaped metal plates 10A and 22A and the end portion 46 of the welded portion 40. In addition to the punching method, the edge trimming method may use a laser cutting method, an air plasma cutting method, or the like. After trimming in this way, the strip-shaped metal plate is sent out to a coating process or the like.

According to the method for joining strip-shaped metal plates according to the present invention configured as described above, the strip-shaped metal plates 10 and 22 are butted to each other and then welded by the welding device 24, and the welded portion 40 is a rolling device.
Rolled by 32. Therefore, as shown in FIG. 2, the welded portion 40 has no step and is welded and joined to the strip-shaped metal plate.
10 and 20 are smoothly conveyed while being in contact with the pass roller and sent to a coating device (not shown) in the subsequent stage, and the coating process is uniformly performed. In this case, the welded portion 40 has a large joint strength and is smoothly transported, so that there is no fear of breakage. Further, it is possible to uniformly apply the coating to the welded portion 40 without retracting the coating device from the welded portion 40 as in the conventional case.

In addition, the work strength of the welded portion 40 is recovered by rolling, so that the tensile strength is recovered and the joint strength is improved as compared with the welding. Therefore, it is particularly effective for crystals, such as aluminum, whose crystals are coarsened by melting during welding.

Furthermore, the surface shape of the welded portion 40 is distorted due to heat concentration during welding and pressure fluctuation during rolling, and stress concentrates during tension loading during transportation. However, as shown in FIG. When the end portion 46 of the welded portion 40 is trimmed, the stress of the welded portion 40 is reduced and there is no risk of the strip-shaped metal plates 10 and 22 breaking.

FIG. 4 (a) shows a method of joining the strip-shaped metal plates according to the present invention, in which a narrow strip-shaped metal plate is used for the strip-shaped metal plate 10 that is rewound from the roll 12, and the strip-shaped metal plate 22 to be joined is largely strip-shaped. It is a top view which joined both using a metal plate. Also, the fourth
FIG. 2B is a plan view in which a large strip metal plate is used for the strip-shaped metal plate 10 to be rewound in the opposite direction, and a small width strip metal plate is used for the joining strip-shaped metal plate 22 to join them. As shown in FIGS. 4 (a) and 4 (b), the edge 48 at the end of each largely strip-shaped metal plate
Is edge-trimmed by the edge trimming device 42 up to the width of the narrow strip metal plate to form a taper shape, so that the end of the strip metal plate at the welded portion 40 does not swing during transportation. Therefore, the method of joining strip-shaped metal plates according to the present invention can be applied to strip-shaped metal plates having different widths.

Next, a comparative test was performed between the strip-shaped metal plates joined by the strip-shaped metal plate joining method according to the present invention and the strip-shaped metal plates joined by the conventional method.

The test sample, the thickness of the strip metal plate 10, 22; 0.2 mm, width; 3
Joined strip-shaped metal sheets treated with aluminum foil of 00 mm, TIG arc welding performed in a butt state at a speed of 1 m / min, rolling force of 50 kgf and rolling speed of 0.5 m / min. Is designated as Sample No. 1, and the sample subjected to only the welding treatment without the rolling treatment is designated as Sample No. 2. In addition, Sample No. 3 was obtained by superimposing ultrasonically by a conventional method.

Using these test samples No.1 to No.3, while applying a tension of 30 kg, make them circulate between 12 rubber rolls (100φ) and 2 rubber rolls (200φ), check the number of laps until cutting, and pass the pass roller. I did a test. The results are shown in Table 1.

As described above, it can be seen that sample No. 1 welded and rolled has a significantly improved pass roll passability.

Next, a comparative test of tensile strength, step state, and coating treatment was performed.

The test sample, the thickness of the strip metal plate 10, 22; 0.3 mm, width; 3
Joined strip-shaped metal sheets treated with aluminum foil of 00 mm, TIG arc welding performed in a butt state at a speed of 1 m / min, rolling force of 50 kgf and rolling speed of 0.5 m / min. Is designated as Sample No. 1, and the sample subjected to only the welding treatment without the rolling treatment is designated as Sample No. 2. Further, a sample No. 3 is obtained by performing conventional ultrasonic bonding with superposition.

As can be seen from this result, the level difference is reduced by the rolling treatment, and the coating treatment result is clearly superior to the conventional one.

Next, a comparative test on the edge trimming process was performed.

The test sample is a strip metal plate 10 having a thickness of 0.2 mm and a width of 300 mm.
The aluminum plate and the thickness of the strip metal plate 22; 0.2 mm,
Width: 200mm aluminum plates, 0.5mm on top of each other, TIG
Arc welding is performed at a speed of 1 m / min, the rolling force is 45 kgf, and the welding portion 40 is rolled at a rolling speed of 0.5 m / min.
Edge trimming of both ends of 0 and the strip-shaped metal plate 10 was performed, and the bonded strip-shaped metal plate thus treated was sample No. 1.
Sample No. 2 is the one that has been subjected to the above-mentioned rolling process and not subjected to the edge trimming process.

As shown in Table 3, the sample of No. 1 is superior to the sample of No. 2 in which the edge trimming is not performed in the treatment of the coating surface, and a break or the like does not occur at the edge of the joint 40 during transportation.

By performing the rolling process as described above, the steps are sufficiently eliminated and the bonded strip-shaped metal plate is smoothly transported. or,
It can be seen that when the edge trimming process is performed, breakage at the welded portion 40 is reduced.

〔The invention's effect〕

As described above, according to the joining method of the strip-shaped metal plates according to the present invention, the thin strip-shaped aluminum strip-shaped metal plates are overlapped with each other, and the overlapping portion is welded and joined, so that the tensile strength of the welded joint portion is increased. Can be improved. Also,
Since the welded and welded joint is rolled, the step in the welded joint can be eliminated. Furthermore, since both ends of the welded joint are trimmed, it is possible to prevent stress concentration at the welded joint when tension is applied during transportation. Therefore, even when the thin aluminum strip-shaped metal plates having a thickness of 0.1 mm to 0.5 mm are welded and joined to each other, the strip-shaped metal plates do not break in the carrying process and do not adversely affect the coating process. Can be transported.

[Brief description of drawings]

FIG. 1 is an explanatory view of a method for joining strip-shaped metal plates according to the present invention,
FIG. 2 is a perspective view showing a welded portion which is welded and rolled by the method for joining strip-shaped metal sheets according to the present invention, and FIG. 3 is a welded portion which is edge-trimmed by the method for joining strip-shaped metal sheets according to the present invention. Plan views, FIGS. 4 (a) and 4 (b) are plan views of a welded portion when band-shaped metal plates having different widths are bonded, and FIGS. 5 (a) and 5 (b) are conventional bonding methods for band-shaped metal plates. It is a side view of the welding part by. 10, 22 ... Strip metal plate, 16 ... Joining device, 18 ... Pre-cut device, 24 ... Welding device, 32 ... Rolling device, 36 ... Edge trimming device, 40 ... Welding part.

Claims (1)

[Claims] 1. Aluminum band-shaped metal plates having a thickness of 0.1 mm to 0.5 mm are superposed on each other and welded so that the overlap margin is about 0.5 mm, the welded joint is rolled, and the welded joint is welded. A method for joining strip-shaped metal plates, characterized by trimming both ends of a part.