JPH03184671A - Device for joining band-shaped metallic sheet - Google Patents

Abstract

PURPOSE:To prevent the generation of holing and unwelded parts which are the cause for the degradation in the strength of the joint part of band-shaped metallic sheets by forming the pressing surfaces of clamping members which press the band-shaped metallic sheets as rough surfaces. CONSTITUTION:The front end 10A of the succeeding band-shaped metallic sheet 10 and the rear end 22A of the preceding band-shaped metallic sheet 22 are first cut by cutter blades 20, 20 of a precutting device 18. The front end 10A of the band-shaped metallic sheet 10 and the rear end 22A of the band-shaped metallic sheet 22 are superposed slightly on the front surface of a back bar 31. Cylinders 29,... are then extended and the band-shaped metallic sheet 10 is pressed and fixed by the clamps 26. The band-shaped metallic sheet 22 is pressed and fixed by the clamps 28. The slightly superposed parts of the band-shaped metallic sheets are then welded and joined by a welding torch 30. The bottom ends of the clamps 26 and the clamps 28 are formed as rough surfaces by knurling, etc., and, therefore, the band-shaped metallic sheet 10 and the band-shaped metallic sheet 22 are surely held by the clamps 26 and 28. The set size of the superposed part does not change even if the ends of the metallic sheets 10 and 26 are expanded by the heat at the time of welding. The joining of the slightly superposed part by welding is, therefore, possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a welding apparatus for band-shaped metal plates, and more particularly to a welding apparatus for band-shaped metal plates for joining flexible band-shaped thin metal plates.

Two conventional methods for joining band-shaped metal plates include a method of overlapping and joining band-shaped metal plates, and a method of butting and joining the band-shaped metal plates.

Overlap joining method: As shown in Figure 5 (A),
The band-shaped gold@vi1.10 and the band-shaped metal plate 72 are overlapped, and the overlapping surfaces 73 are adhered with double-sided adhesive tape or fused using ultrasonic waves (Japanese Patent Laid-Open No. 59-24526).

As shown in FIG. 5(B), the butt joining method involves butting the ends of the band-shaped metal plates 70 and 72 against each other, and joining the butt portions 75 with one-sided adhesive tape 76 and 76.
(Japanese Unexamined Patent Publication No. 59-24526).

However, in the overlapping joining method shown in FIG. 5(a), there is a problem in that since there is a step at the joining part, it is not possible to make smooth contact with a pass roller or the like. In addition, when the stepped portion passes through the coating device, there is a problem that the coating device must be evacuated so as not to damage the coating device at the stepped portion, and even if the coating device is not evacuated, the bonding surface 7
3 has a problem in that it adversely affects the coating state and causes quality defects.

Furthermore, in addition to these problems, in many cases the joint surface 73 cannot be bonded over the entire surface 5), so there are problems such as the joint surface 73 turning over during transportation of the strip metal plate, and the strip metal plate being exposed to treatment liquid during the surface treatment process. When passing through, there is a problem in that foreign matter such as processing liquid gets into the gap between the bonding surfaces 73 and causes quality defects in subsequent processes.

On the other hand, in the butt joining method shown in Fig. 5 CB), since joining is performed using a single-sided adhesive tape 76, 76, a difference in level due to the thickness of the tape 76, 76 occurs at the joining part, causing the same problem as the overlap joining method. . Furthermore, in the case of this joining method, the tape 7 is
6.76 is scratched by the edge of the abutting portion of the band-shaped metal plate, resulting in a problem in that the strength is weakened and it is easy to cut.

Further, since the joined band-shaped metal plates are subjected to bending stress when passing through the bus roller, the joint portion is likely to break due to this bending stress. This phenomenon occurs particularly when the metal strips are thin, such as 0.1 m to 0.2 mm, or when there is a large difference in thickness between the two metal strips to be joined.

In order to solve such problems, a welding joining method is known in which band-shaped metal plates are joined together by welding. This welding method involves fixing strip metal plates whose ends are butted against each other or overlapped by a small amount with clamps, welding the butted parts or the overlapped parts by a small amount, and rolling the step at the welded joint. It is possible to reduce the difference in level by processing, recover the tensile strength decreased by welding, and further prevent stress concentration.

[Problems to be Solved by the Invention] However, in the conventional welding method, when band-shaped metal plates are welded from one end of the welded joint to the other, especially when the band-shaped metal plates are wide, other parts may be welded together. End side (welding end side)
The abutting portion or minute overlapping portion and its vicinity expand due to welding heat and slide on the contact surface against the holding force of the clamp.

Therefore, if the set dimensions of the butt part or minute amount overlap part change and become smaller or larger, for example, if the set dimensions of the minute amount overlap part become smaller, holes are likely to occur, and the set size becomes smaller or larger. If it becomes large, there is a problem that the edge of the band-shaped metal plate on the lower side of the minute overlap remains unwelded and causes a reduction in joint strength.

The present invention has been made in view of the above circumstances, and provides a joining device for band-shaped metal plates that can prevent the occurrence of holes and unwelded parts that cause a decrease in the strength of the band-shaped metal plate joints. The purpose is to

Means for Solving Two Problems: In order to achieve the above object, the present invention provides for connecting the respective ends of the preceding first metal band plate and the following second metal band plate to each other. In a band-shaped metal plate joining device that presses and fixes a receiving member and a clamp member in a state of butting or overlapping by a minute amount, and welding and joining the butt portion or the overlapped portion by a minute amount, a first and a second The pressing surface of the clamp member that presses the band-shaped metal plate is formed into a rough surface shape.

[zeta] Effect] According to the present invention, since the pressing surface of the clamp member that presses the band-shaped metal plate is formed into a rough surface, the band-shaped metal plate can be reliably pressed and fixed. Therefore, even if welding heat is generated during welding and the abutting portion or minute overlapping portion and its vicinity expand, the set dimensions will not change.

For this reason, it is possible to prevent holes or unwelded portions from occurring at the welded joints between the band-shaped metal plates.

Second Embodiment] A preferred embodiment of the apparatus for joining strip metal 1@plate according to the present invention will be described in detail below with reference to the accompanying drawings.

As shown in the belt-shaped metal plate joining apparatus shown in FIG. 1, the belt-shaped metal plate 10 is unwound from the roll 12, rolled onto a bus roller 14, and conveyed to the joining apparatus 16. This joining device 16
is mainly composed of a bricutting device 18, a welding device 24, and a rolling device 32.

The bricutting device 18 is composed of a pair of cutter blades 20.20, and the leading end 810A of the trailing band-shaped metal plate 10 and the rear end 22A of the leading band-shaped metal plate 22 are connected to the cutter blade 2.
Cut at 0.2o.

A welding device 24 is disposed downstream of the bricutting device 18. The welding device 24 has clamps 26, 28 and a welding torch 30, and the upper ends of the clamps 26 and 28 are provided with a second '5! As shown in J, the rod ends of cylinders 29, 29, . . . for pressing are attached.

Further, as shown in FIG.
, 28. As shown in FIG. 4, the surface is formed into a rough surface by low left processing or the like. These clamps 26 and 28 descend when the clamps 29, 29... are extended, and press and fix the belt-shaped metal plate 10 with the roughened lower end 26A of the clamp 26, and the roughened lower end of the clamp 28 The band-shaped metal plate 22 is suppressed and fixed at the portion 28A.

As shown in FIG. 3, the welding torch 30 has a back bar 31
The upper metal band moves from one end of the minute overlapping part of the metal plate 10.22 to the other end, and the ends 10A, 22 of the metal band plate are moved.
Weld A.

In addition to TIG arc welding and MIG arc welding, welding methods include gas welding, CO2, YAG, etc. laser welding, and these methods are based on the type of metal that makes up the metal strip 1@plate 10.22. It is used depending on the thickness of the plate.

A rolling device 32 is provided downstream of the welding device 24, and a rolling roller 34 of the rolling device 32 rolls a stepped portion created by welding and joining. This rolling treatment restores the tensile strength of the joint, which has been reduced by welding, through work hardening, and further suppresses stress concentration, thereby increasing the joint strength.

The operation of the band-shaped metal plate joining apparatus according to the present invention configured as described above will be explained.

First, the cutter blade 20.20 of the cutting device I8 cuts the leading end 10A of the trailing band-shaped metal plate 10 and the rear end 22A of the leading band-shaped metal plate 22. Next, as shown in FIG. 3, the front end 10A of the strip metal plate 10 and the rear end 22A of the strip metal plate 22 are slightly overlapped on the upper surface of the back par 31, and the clamp 29 shown in FIG. 29...
is extended and the lower end 26A of the clamp 26 is attached to the band-shaped metal plate 1.
0 is pressed and fixed, and the band-shaped metal @ Saka 22 is pressed and fixed with the lower end 28A of the clamp 28.

Next, the welding torch 30 is moved along the minutely overlapping portion of the band-shaped metal plates to weld and join the minutely overlapping portion. In this case, the lower N between the clamps 26 and 28
The part is formed into a rough surface by low left processing etc., so
The band-shaped metal plate 10 and the band-shaped metal plate 22 are securely held by the clamps 26 and 28, and even if the :IIj portion of the band-shaped metal plate 10.22 expands due to the heat generated during welding, the overlapped portion will not expand by a minute amount. Setting dimensions do not change. Therefore, it is possible to successfully perform welding and joining with a minute amount of overlap.

After the welding is completed, the welded joint is rolled by the rolling roller 34, and the welding and joining of the strip metal plate 10 and the strip metal plate 22 is completed.

Next, a welding joint test was carried out on the minute overlapping portions of metal strips and metal plates using two types of clamps: a rough surface type clamp used in the belt metal plate joining device according to the present invention and a conventional type clamp. The appearance of the welded bead was compared. The test is A, f! with a thickness of 0.1ml11 and a width of 1000 strokes. ! ! !
Tests were conducted 50 times each using two types of clamp types using a strip of gold 1@plate. The test results are shown in Table 1.

Table 1 As is clear from Table 1, the thickness of the ultra-thin plate is 0. A of l-beat
In the case of f-strip metal plates, it has been found that the rough surface type clamp reduces the occurrence of holes and unmelted material compared to the conventional type clamp.

In the above embodiments, the minute overlapping portions of the band-shaped metal plates are welded together, but the present invention is not limited to this, and the abutted portions may be welded and bonded by abutting the band-shaped metal plates against each other.

〔Effect of the invention〕

As explained above, according to the belt-shaped metal plate welding apparatus according to the present invention, the set dimensions of the abutting or overlapping parts of the first and second belt-shaped metal plates do not change depending on the welding part. There are no holes or unwelded parts in the welded joints between the bands. Therefore, the strength of the welded joint can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a welding device for band-shaped metal plates according to the present invention, FIG. 2 is a front view of a welding device used in the welding device for band-shaped metal plates according to the present invention, and FIG. ,A-A
Fig. 4 is an enlarged view of the clamp used in the welding equipment shown in Figs. 2 and 3, and Figs. 5 (A) and (B) show the conventional method of joining metal strips and shroud plates. It is a perspective view of a joint part. 10.22... Band-shaped metal plate, 16... Joining device, 18... Bricutting device, 24... Welding device,
26.28... Clamp, 26A, 28A...
Lower end portion, 30... Welding torch, 32... Rolling device, 34... Rolling roller. Figure 9 Figure 3 (E3) Figure 26A. 8A

Claims (1)

[Claims] (1) The ends of the leading first metal band and the second metal band following the plate are pressed against each other by a receiving member and a clamp member with their ends pressed against each other or slightly overlapped, A joining device for band-shaped metal plates that welds and joins butt portions or minute overlapping portions, characterized in that the pressing surfaces of the clamp members that press the first and second band-shaped metal plates are formed into a rough surface shape. A device for joining strip-shaped metal plates.