JPH03106565A - Method and device for joining band-like metallic plate - Google Patents

Abstract

PURPOSE:To prevent a hole from being made in a joint part at the time of welding and to improve the strength of the joint part by rewinding a band-like metallic plate wound round, from a core, straightening a winding way of an end part of the band-like metallic plate, superposing each end part by a minute quantity and welding and joining them. CONSTITUTION:A band-like metallic plate 10 is rewound from a roll 12 and carried to a joining device 16. A tip part 10A of the metallic plate 10 is cut by a pre-cutting device 18, and formed so that it can be superposed by a minute quantity to a rear end part 22A of a band-like metallic plate 22. A straightening roller 32 is provided on the left side and the right side, respectively of clamps 26, 28 in the drawing and straightens a winding way of the end parts 10A, 22A by moving in the right and the left directions. The straightened end parts 10A, 22A are superposed exactly by a set quantity, and held by the clamps 26, 28 in this state. Subsequently, by operating a welding torch 30, the minute quantity superposed parts of the end parts 10A, 22A are welded and joined. Also, by a rolling roller 36 of a rolling device 34, rolling of the welded and joined part is executed and a step difference is pressed and compressed, and the joining strength is enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and a joining device for band-shaped metal plates, and particularly to a band-shaped metal plate for joining the ends of flexible AI alloy band-shaped metal plates. The present invention relates to a method and device for joining plates.

[Conventional technology]

Generally, a joining method is adopted for joining band-shaped metal plates, in which the band-shaped metal plates are welded to each other and the welded joint is rolled. In this joining method, shielding gas is first blown from the welding torch and back bar onto the upper and lower surfaces of the small amount of overlapping parts of the metal strips to be joined, and the metal strips are welded together. It is difficult to uniformly blow out a small amount of gas onto the lower surface of the overlapped portion.

Therefore, variations occur in the blowing pressure of the shielding gas,
When melting the back side of a strip metal plate with a welding torch (Uranami welding), holes occur in areas where the blowing pressure is strong.

In order to solve this problem, the present applicant has developed a method for overlapping metal plates 70 and 72 shown in FIG. A joining method was proposed in which the joining part 76 was welded to prevent holes from forming in the joining part 76.
Specification No. 04379>.

The applicant also noted that the occurrence of holes in the joint is caused by instability of the arc, and the tip of the welding electrode was adjusted to a diameter of 0.
We propose a method for forming a flat surface of 31Ilff1 or more and welding it while keeping the arc in a stable state (
(Japanese Patent Application No. 1-33313).

However, when welding strip metal plates overlapping each other by a minute amount, as shown in FIG. 4, the lower strip metal plate 70
If the thickness of the plate is thick, the upper band-shaped metal plate 7 overlapped by a small amount
2 is warped, the weld bead is not stabilized during welding, and holes are formed in the joint 76.

In order to solve this problem, the present applicant formed a step portion 82 approximately equal to the plate thickness l of the band-shaped metal plate 70 on the back par 84, as shown in FIG. i72A is placed and the end 70 of the band-shaped metal plate 70 is placed.
A method is disclosed in which the end portion 72A of the band-shaped metal plate 72 is slightly overlapped with A to prevent the band-shaped metal plate 72 from warping (Japanese Patent Application No. 1-168331). , [Problem to be Solved by the Invention] However, since the band-shaped metal plate is generally stored in a state where it is wound around a winding core, when the band-shaped metal plate is unwound from the winding core, the band-shaped metal plate has a tendency to curl. Attached. For this reason, it is not possible to accurately maintain the minute amount of overlap between the strip metal plates as per the set value, which causes problems such as the welding beat becoming unstable and holes forming in the joint, reducing the strength of the joint. .

On the other hand, the present applicant has disclosed in Japanese Patent Laid-Open No. 63-21458 a method of welding and joining the band-shaped metal plates 70 and 72 by reducing the thickness of the end portion 72A of the band-shaped metal plate 72, as shown in FIG. However, even with this joining method, if the band-shaped metal plates 72 have a tendency to curl, the minute amount of overlap between the band-shaped metal plates 72 will be less than a predetermined amount, resulting in a problem that holes will occur at the joint.

The present invention has been made in view of the above circumstances, and provides a method and joining method for joining band-shaped metal plates that can prevent holes from forming at the joint of belt-shaped metal plates with curls and improve the strength of the joint. The purpose is to provide equipment.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention unwinds the band-shaped metal plate wound around the winding core, and welds and joins the ends of the band-shaped metal plates in a state in which they overlap each other by a minute amount. The method for joining band-shaped metal plates is characterized in that the curling of the ends of the rewound metal plate is corrected, and the ends of the band-shaped metal plates are overlapped by a minute amount and welded and joined. .

[Effect]

According to the present invention, it is possible to correct the curling of the overlapping portions of the band-shaped metal plates to be joined before overlapping the ends of the band-shaped metal plates by a minute amount. The amount can be maintained accurately at the set value. Therefore, it is possible to prevent holes from forming at the joint during welding.

〔Example〕

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

As shown in FIG. 1, the band-shaped metal VilO of Al alloy is unwound from the roll 12 wound around the winding core 1l, rolled onto a pass roller l4, and conveyed to the joining device 16. The pre-cut device 18 of the joining device 16 has two sets of cutter blades 20,
It consists of 20 or so people.

The tip 10A of the band-shaped metal slope 10 is connected to a bricutting device l8.
It is cut by the aluminum alloy strip and shaped so that it can be overlapped by a minute amount with the rear end portion 22A of the AI alloy strip @ slope 22.

A welding device 24 is provided at the rear stage of the bricutting device l8, and the welding device 24 is connected to the clamp 2 as shown in FIG. 2(A).
6, 28, a welding torch 30, and correction rollers 32, 32.

The clamp 26 holds the tip a'BlOA of the strip metal scrap plate lO, and the clamp 28 holds the rear end 2 of the strip metal suction plate 22.
2A is retained. The welding torch 30 is connected to the clamps 26, 2
The minute overlapping portions 10A and 22A of the band-shaped metal plates 10 and 22 held at 8 are welded and joined.

Further, in FIG. 2(A), a correction roller 32 is on the left side of the clamp 26, and a correction roller 32 is on the right side of the clamp 28.
2 is provided. The correction roller 32 is a pair of rollers 3
2A and 32B, which are band-shaped metal plates 10 and 22.
It is provided so that it can be slid in the left-right direction (arrow A-B direction) in FIG. 2 while supporting the end portions 10A and 22A. That is, the ends 10A, 22A of the belt-shaped metal plates 10, 22, which are curled by the rollers 32A, 32B,
When the rollers 32A and 32B are moved in the left and right directions in FIG.
The curl of 22A is corrected.

Therefore, the corrected end portions 10A, 22A are overlapped by an accurate set amount, and held in this state by the clamps 26, 28. Next, the welding torch 30 is operated to weld and join the slightly overlapping portions of the end portions 10A and 22A by high-frequency pulse arc welding.

In this way, the ends 10A, 22 of the band-shaped metal plates 10, 22
Since the joint part is welded after correcting the curl of A, the end parts 10A and 228 can be precisely overlapped by a minute amount by a predetermined amount, and no holes will be formed in the joint part during welding.

On the other hand, a rolling device 34 is provided downstream of the welding device 24, and a rolling roller 36 of the rolling device 34 rolls the welded joint between the end portions 10A and 22A of the strip metal plates. The step created in the welded joint by this rolling process is pressed and compressed, and the joint strength is increased by this rolling process. This is because the tensile strength of the welded joint, which has decreased due to welding, is restored through work hardening during the rolling process, and at the same time, the welded joint is processed into a shape that is less likely to cause stress concentration.

Next, a method for joining band-shaped metal plates according to the present invention and a test for forming holes in joints joined using a joining apparatus will be described.

The test was conducted with a thickness of 0.24a, a radius of 9QO u, and a thickness of Q. lm
+o, two Al alloy strip metal plates (A
1 plate) are overlapped by a minute amount (approximately 1a+) and welded together,
It was investigated whether holes were formed in the joints.

Sample N (L1 is the above two Al plates welded and joined without curling, Sample NllL2 is the above two AI plates welded together without curling, and sample NllL2 is a band-shaped metal plate joining method and joining apparatus according to the present invention. Sample Vα3 is the one in which the two Al plates are welded and joined together without straightening the curls.Fifty samples of each of these three types were produced, and the The state of occurrence of holes was investigated.The results are shown in Table 1.

Table 1 As is clear from the results in Table 1, holes occurred in 5 out of 50 samples of sample Na 2, which was welded and bonded after curling was corrected.

In addition, sample Nα3 was welded without straightening the curl.
Holes occurred in 25 out of 50 samples. In this way, it has been found that the number of holes that occur when the curl is corrected is reduced compared to when the curl is corrected.

In this test, Al plates with a thickness of 0.24 mm and a thickness of 0.1 mm were used, but the plate thickness is not limited to this.
A similar effect can be obtained with a thick band metal plate.

Further, in the above embodiment, the belt-like metal plates 10 and 2 with curling
2 was held between the straightening rollers 32, 32 and slid to correct the curling of the band-shaped metal plates 1O, 22, but the present invention is not limited to this. Arranged as shown, the metal strips IO, 22 are passed between the small rollers 42, 44, 46, and the ends 10A of the metal strips are passed through the metal strips IO, 22.
, 22A may be corrected. Furthermore, Fig. 2 (C)
As shown in FIG.
22A is placed on the back par 48, and the rolling roller 50
While pressing lightly with
The curl of OA, 22A may be corrected.

〔Effect of the invention〕

As explained above, according to the method and device for joining strip-shaped metal plates according to the present invention, it is possible to accurately maintain the minute overlapping amount of strip-shaped metal plates to a set value, so that The number of holes in joints can be reduced. Therefore, it is possible to improve the strength of the joint.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing a belt-shaped metal plate welding apparatus according to the present invention, and FIGS. 2(A) to 2(C) show curling patterns used in the belt-shaped metal plate welding apparatus according to the present invention. FIGS. 3 to 6 are enlarged views of the main parts of the correction device, and sectional views of the main parts showing the conventional welding and joining method. 10, 22... Band-shaped metal plate, 11... Winding core,
16... Joining device, 18... Pre-cutting device,
24... Welding device, 30... Welding torch, 32
...straightening roller, 34...rolling device, 36...
・Rolling roller, 4 2, 1 la. 4 4,

Claims (2)

[Claims] (1) In a band-shaped metal plate joining method in which a band-shaped metal plate wound around a winding core is unwound from the winding core, and the end portions of the band-shaped metal plates are welded and joined in a state where they are slightly overlapped, the above-mentioned steps are performed. A method for joining band-shaped metal plates, which comprises correcting the curling of the ends of the rewound metal band-shaped plates, overlapping the ends of the band-shaped metal plates by a minute amount, and welding them together. (2) In a band-shaped metal plate joining device that unwinds a band-shaped metal plate wound around a winding core from the winding core and welds and joins the band-shaped metal plates with the end portions of the band-shaped metal plates overlapping each other by a minute amount, the above-mentioned steps are performed. A joining device for band-shaped metal plates, characterized in that a curl correction roller device for correcting curls in a rewound metal band-shaped plate is provided.