JPH0390280A - Method and device for joining beltlike metal plates - Google Patents

Abstract

PURPOSE:To prevent the occurrence of hole by foreign matter burning and to improve the quality by sucking and removing dust, etc., along a joining part to be welded between beltlike metal plates and then, welding and joining the joining part. CONSTITUTION:The tip 10A of a beltlike metal plate 10 is superposed slightly on a rear end 22A of a beltlike metal plate 22 and the tip 10A and the rear end 22A are fixed by a clamp on a back bar 44. A high-frequency pulse arc is then generated from an electrode 30A of a welding torch 30 and compressed air is supplied to a supply pipe 38 and a suction nozzle 32 is allowed to generate suction force and further, as necessary, the compressed air is blown out from a blowout nozzle 34. When a traveling unit 36 is moved in the right direction, the foreign matter such as dust fixed on the slightly superposed part of the tip 10A and the end 22A is blown off and sucked by the suction nozzle and then, arc welding can be carried out. By this method, a weld zone where hole by foreign matter burning does not occur can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and a joining apparatus for joining strip-shaped gold plates, and particularly to a strip-shaped metal plate for joining strip-shaped metal plates of flexible AI2 alloy. The present invention relates to a joining method and a joining device.

[Conventional technology]

Conventionally, when joining band-shaped metal plates to each other, as shown in FIG. 24526) and a method of bonding the abutting portions 75 of band-shaped metal plates 70, 72 with single-sided adhesive tape 76, 76 as shown in FIG.
9-24525).

However, in the method of joining strip-shaped metal plates shown in FIGS. 3 and 4, there are problems in that the joining part has a step, so it cannot be brought into smooth contact with a bus roller, etc., and that the metal plate passes through the coating device in the photosensitive layer coating process. There is a problem in that the coating device must be retracted so that the stepped portion does not come into contact with the coating device.

In order to solve this problem, a joining method has been proposed in which band-shaped metal plates are welded together and the joint is rolled to remove the step. In this method, as shown in FIG. 5, after a small amount of band-shaped metal plates 70 and 72 are overlapped on a back par 80, a shield blows out gas 84 on the upper and lower surfaces of the overlapped portion. At step 84, a small amount of overlapping portion is arc welded while preventing oxidation of the electrode 86 of the welding torch 85 and the joint portion 88, and this weld joint portion 88 is rolled to remove the step of the joint portion 88.

In this case, shielding gas is blown out from the welding torch onto the upper surface of the small amount overlapped part, and back par 80 is applied to the lower surface.
The shielding gas 84 is blown out from the holes 90, 90, .

However, since it is difficult to uniformly blow out the shielding gas 84 from the holes 90, 90, etc. of the back par 80, variations occur in the blowing pressure of the shielding gas. There is a problem that holes occur at strong points.In addition, 91 in FIG. 5 is a clamp.

In order to solve this problem, the applicant proposed a method for joining band-shaped metal plates by joining the band-shaped metal plates together by uranami welding without blowing out shielding gas from the holes 90, 90... of the back par. are doing. (Japanese Unexamined Patent Publication No. 64-2776, Japanese Patent Application No. 63-364379) In addition, since the arc generated at the electrode 86 requires about 0.1 seconds to several seconds to stabilize, the band-shaped metal is immediately When joining plates by welding, strip metal plates are welded together using an arc that is larger or smaller than the set value.Therefore, there are cases where melting occurs at the welding start end, or insufficient melting or unmelting occurs. There is a problem.

Furthermore, if the arc is unstable, it is likely to cause non-uniform beads when welding thin strip metal R plates, leading to problems such as poor melting, holes, and poor appearance (loss of gloss). .

In order to solve this problem, the present applicant separated the electrode from the strip metal plate to generate an arc, and from the time of arc generation, the applicant
A method for joining band-shaped metal plates has been proposed in which the joint portion of the band-shaped metal plates is welded after a lapse of more than a second (Japanese Patent Application No. 1-20534).

In addition, as shown in FIG. 6, in the case of arc welding, the electrode 86
When the metal plate moves in the direction of the arrow and reaches the metal strip 70, 72, the arc length rapidly decreases from L to L'. Therefore, if the tip of the electrode 86 of the welding torch 85 is shaped like an arrow, the arc will not stop. It becomes stable.

For this reason, it is not possible to perform Uranami welding of the metal strips @ Saka 70.72 together, resulting in poor melting at the weld joint at the welding start end, or melting at the weld joint due to excessive arc heat. There is a problem that holes may occur. Furthermore, since the arc length rapidly increases to L' even at the end of welding, there is a problem similar to that at the start end of welding.

In order to solve this problem, the applicant has proposed a method of joining metal strips and plates in which arc welding is performed by forming the tip of the electrode into a hemispherical shape or a flat surface with a diameter of QJIIILI+ or more (patent application). Publication No. 1-32292, patent application No. 1-3331
(3) [Problem to be solved by the invention] However, Japanese Patent Application Laid-Open No. 64-27776, Japanese Patent Application No. 304379-1982, Japanese Patent Application No. 1-32292, and Japanese Patent Application No. 1-20534 , and patent application Hei 1-33
In the method for joining belt-shaped metal plates disclosed in Publication No. 313, the melting rate is +1!
If there is foreign matter such as dust, paper waste, thread waste, aluminum cutting waste, fume generated during welding, etc. in the part, there is a problem that the foreign matter cannot be removed and holes may occur due to the combustion of the foreign matter.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method and a device for joining band-shaped metal plates, which can prevent holes from being formed due to combustion of foreign substances such as dust.

[Means to solve problems]

In order to achieve the above object, the present invention provides a method for joining belt-shaped metal plates in which the ends of the belt-shaped metal plates are welded together using a welding device, and the welded joint is rolled by a rolling device. The method is characterized in that the joints are welded after dust and the like are removed by suction along the joints to be welded.

[Effect]

According to the present invention, when performing arc welding on the abutting portions or minute overlapping portions of band-shaped metal plates, the suction device is run along the abutting portions or minute overlapping portions to remove foreign matter such as dust in that area. Since the particles are welded together after being removed by suction, it is possible to prevent holes in the welded joints due to combustion of foreign substances.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the method and apparatus for joining strip-shaped gold plates according to the present invention will be described in detail below with reference to the accompanying drawings.

11th! FIG. 1 is an explanatory diagram of a method for joining band-shaped metal plates according to the present invention. As shown in FIG. 1, the belt-shaped metal plate lO of A1 alloy is rewound from the roll 12, rolled onto the bus roller 14, and conveyed to the joining device 16. The pre-cutting device 18 of the joining device 16 consists of a cutter 20.20.

The tip end 10A of the band-shaped metal plate IO is connected to the bricutting device 18.
It is cut and formed so that it can be accurately matched or slightly overlapped with the rear end portion 22A of the band-shaped metal plate 22 to be joined. In addition, the belt-shaped metal plate 10 to be rewound
The pre-cut device 218 is not used when it is possible to butt or slightly overlap the rear end portion 22A without cutting the tip #1 portion 10A.

A welding device 24 is provided downstream of the bricutting device 18, and the welding device 24 mainly includes a welding torch 130, a suction nozzle 32, and a blowing nozzle 34, as shown in FIG. The welding torch 30 is attached to the left side of the traveling unit 36, and the traveling unit 36 is supported by the welding device 24 so as to be movable in the left-right direction in FIG. The suction nozzle 32 is provided on the right side of the traveling unit 36, and the suction nozzle 32 is provided with a supply pipe 38 for supplying compressed air and an exhaust pipe 40 for exhausting the supplied air. Therefore, when compressed air is supplied from the supply pipe 38 and exhausted from the exhaust pipe 40, a suction force is generated at the opening 32A of the intake nozzle 32. The blowout nozzle 34 is located on the right side of the suction nozzle 32 in FIG. The blow-off nozzle 34 is provided with a supply pipe 42 that supplies compressed air to the blow-off nozzle 34 . The blowing nozzle 34 is connected to the belt-shaped metal plates 10, 22.
Provided to lift or blow away foreign matter stuck to the edge of the Use this function as needed.

When welding the ends of the belt-shaped metal plates 10.22 together using this welding device 24, first, the belt-shaped metal plates 10, 22 are welded to each other on the back par 44.
Overlap a small amount with A, and use a clamp (not shown) to
Fix 1SI OA, 22A. Next, welding torch 3
A high frequency pulse arc is generated from the 0 electrode 30A, compressed air is supplied to the supply pipes 38 and 42 to generate suction force in the suction nozzle 32, and compressed air is further blown out from the blow-off nozzle 34 as necessary. In this state, when the traveling unit 36 is moved to the right (in the direction of the arrow) in FIG.
The end 10
If necessary, foreign matter such as dust stuck to the overlapping part of A and 22A is lifted up or blown away with compressed air blown out from the blow-off nozzle, and the foreign matter remaining in the overlapping part is sucked out. This is because arc welding can be performed after suctioning with a nozzle.

In this way, since the welding torch 30, suction nozzle 32, and blowout nozzle 34 are integrated, foreign matter can be removed immediately before welding and joining. Therefore, strip gold @ plate same ±10
．． The probability that foreign matter will accumulate in the small amount overlapping portion of No. 22 is reduced, and holes due to foreign matter will not occur in the small amount overlapping portion during arc welding. It is also possible to remove harmful substances such as fumes generated by welding.

A rolling device 48 is provided downstream of the welding device 24, and the rolling rollers 50 of the rolling device 48 are made of strip metal, 1 slope end filOA.
, 22A are welded together. By such rolling treatment, the step formed in the welded joint is pressed and compressed. This rolling treatment increases the bonding strength. This is because the tensile strength, which has been reduced by one degree due to welding, is recovered by work hardening through rolling treatment, and at the same time, it is possible to process the material into a shape that is less likely to cause stress concentration.

Incidentally, in the above embodiment, the band-shaped metal plate 10 and the band-shaped metal plate 22 were overlapped by a small amount, but they may be butted and joined by welding. In addition, although high-frequency pulsed arc welding was used, TI
They may be joined by G-arc welding. Further, although an ejector type suction nozzle using compressed air was used, a vacuum pump or a satin blower may also be used. Incidentally, the apparatus according to the present invention can also be used as a continuous welding apparatus such as a pipe production line.

Next, a method for joining band-shaped metal plates according to the present invention and a test of a joint portion joined by the joining apparatus will be described.

The test conditions were compressed air pressure 4 kg/cnf, welding speed 6 m/shielding gas flow rate from welding groove welding torch Ar21.
/min, He1Q j27 min, distance between suction nozzle, air blowing nozzle and abutting part or minute overlapping part: 620 m,
Distance i between welding torch and suction nozzle? The distance between the suction nozzle and the air blowing nozzle was 75 mm.

Table 1 shows the results of welding under these conditions.

Table 1 From Table 1, it was found that no problem occurred in the welding results when a suction nozzle was used, or when a suction nozzle and a blowing nozzle were used.

Next, for the test Na 1.2.4 in Table 1, the plate thickness is 0.
24 meters, 1000u of banner, plate thickness 0.10mm, width 11
000a/1 alloy strips were welded 10 times each, and the presence or absence of foreign matter combustion marks and holes caused by foreign matter combustion were examined. The results are shown in Table 2.

From Table 2, it was found that test No. 1 s 2 did not cause foreign matter combustion marks or holes in the welded joint.

〔effect〕

As explained above, according to the method and apparatus for joining band-shaped metal plates according to the present invention, the welding process is performed after removing foreign matter from the abutting portions or minute overlap portions of the band-shaped metal plates. No holes will occur in the joint due to combustion of foreign matter. Therefore, quality can be improved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a method for joining band-shaped metal plates according to the present invention,
Fig. 2 is an enlarged view of the main parts of the bonding device according to the present invention, and Fig. 3 is a perspective view showing a conventional micro-amount overlapping bonding method. J
FIG. 4 is a perspective view showing a conventional butt joining method, and FIGS. 5 and 6 are enlarged views of essential parts of a welding device used in the conventional joining method.

Claims (2)

[Claims] (1) Weld the ends of the band-shaped metal plates together using a welding device,
A method for joining metal strips in which the welded joint is rolled by a rolling machine is characterized in that the joints are welded after removing dust, etc. along the joints of the metal strips to be welded. A method for joining strip metal plates. (2) In a band-shaped metal plate joining device comprising a welding device that welds the ends of the band-shaped metal plates together and a rolling device that rolls the welded joint, a suction device is integrally provided in the welding device, A welding device for band-shaped metal plates, characterized in that this suction device sucks and removes dust, etc. from the joint portion before welding.