JPH038575A - Joining device for beltlike metal plates - Google Patents

Abstract

PURPOSE:To prevent the occurrence of defective quality due to blowhole enclosing, etc., in the coating stage by forming a difference part in level between a projecting part and a pressing part in the tapered form or in the form of curved surface in the joining device for beltlike metal plates. CONSTITUTION:The beltlike metal plates 26 to be joined are pressed and fixed on a table 10 so that the central part to be rolled is positioned on a back bar 14 by pressing jigs 28. A rolling roller 12 is then depressed by a cylinder 20 and the beltlike metal plates 26 are pressed and fixed. When a motor 18 is driven, rotation is then transmitted to the rolling roller 12 via a gear 24A, a chain 22 and a gear 24B and in a state with the central part to be rolled sandwiched between the projecting part 12B and the back bar 14, rolling is performed. The central part to be rolled is rolled by the projecting part 12B in a state with pressed by the pressing part 12A. Since the shape of the tapered surface or the curved surface 12C is transferred to an edge part of a joining part after rolling, the joining part is rolled smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joining device for band-shaped metal plates, and more particularly to a joining device for band-shaped metal plates that performs a rolling process on a part of the band-shaped metal plates.

[Conventional technology]

As a conventional technique for joining strip-shaped metal plates, there is a technique of rolling the weld bead using a rolling roller (1983).
2-179116).

Another bonding technique is also shown in FIG.
(S42 is placed on the back par 46, and the joint part 42
The vicinity of the metal plate 40 is attracted by the suction table 48, and in this state, the joint part 42 of the metal strip 40 which is butt-jointed is
The raised portion 42A is rolled using a protrusion roller 44 to improve the joint shape and prevent stress concentration.

FIG. 6 shows another embodiment of the conventional joining method disclosed by the applicant. This joining method is
A joining method in which strip-shaped metal plates 50 and 52 of different thickness are butted or slightly overlapped and welded together and rolled so that the difference in thickness between the two recrystallized parts and the adjacent part is within 30%. It is. The joint portion is connected to the rolling roller 54
While holding down the belt-shaped metal plate 52 with the holding part 54A on one side, the heat-affected zone 56A and its vicinity 50A and 56 generated on the thin plate 50 side are rolled by the protruding strip 54B. According to this method, rolling can be performed without causing constrictions or wrinkles in the joint, and a joint that is difficult to break can be provided.

[Problem to be solved by the invention]

However, the method for joining band-shaped metal plates has the following disadvantages.

That is, since a step due to the difference in radius between the protrusion and the presser part of the rolling roller is transferred to the joint, a step approximately equal to the difference in radius between the protrusion and the presser is generated, and this results in a difference in the radius of the protrusion and the presser. At this time, various problems occur.

For example, in the photosensitive layer coating process in the manufacture of planographic printing plates, there is a problem that when the stepped portion of the joint passes through the coating device, air bubbles are drawn in, which adversely affects the coating condition and causes quality defects. . Such a difference in level at the joint becomes more noticeable as the difference in thickness of the band-shaped metal plates to be joined increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a joining device for band-shaped metal plates that can prevent quality defects due to coating conditions.

[Means to solve problems]

In order to achieve the above-mentioned object, the present invention welds and joins band-shaped metal plates against each other or overlaps each other by a small amount, and connects the welded joint with a holding part having a first radius and a holding part that is larger than the first radius. In a band-shaped metal plate joining device that uses a roller consisting of a protrusion portion having a large second radius to roll a welded joint with the protrusion portion while pressing the band-shaped metal plate with the presser portion, It is characterized in that the stepped portion between the protrusion portion and the holding portion is formed into a tapered shape or a curved shape.

[Effect]

According to the present invention, the level difference between the protrusion part and the pressing part of the rolling roller is formed into a tapered or curved shape, and the level difference at the joint part of the strip-shaped metal plate to be rolled is smoothed, so that the coating process can be easily performed. This eliminates the effects of air bubble entrainment, etc., and prevents quality defects.

〔Example〕

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

FIG. 1 is an explanatory diagram of an embodiment of a joining device for band-shaped metal plates according to the present invention, and this joining device includes a table 10, a rolling roller ′, 2, a back par 14, a shaft 16, and a motor 18.
, cylinder 20, etc. are the main components.

The rolling roller 12 includes a pressing portion 12A having a first radius and a protruding portion 12B having a second radius. Further, as shown in FIG. 2, the stepped portion between the protrusion portion 12B and the holding portion 12A has a tapered surface or curved surface 12C,
12C is formed. Furthermore, the difference between the first radius and the second radius, that is, the amount of protrusion of 1 m12B of the protrusion is 0.1 to 5.0 times, preferably 0.5 to 2.0 times the thickness of the material to be rolled. good. In addition, the length of the taper part is 0.15 m to 2.0 m.
3, preferably 0.5++e to 1.51111. The rolling roller 12 may be made of high-speed steel such as SKH or SKD.

In addition to die steel and cemented carbide such as S I = N4
Ceramics such as S +C1ΔL Oz and Z r02 or CBN are used. Further, the surface of the rolling roller 12 is coated with TiN, WC, etc., as necessary, in order to improve wear resistance and prevent the material to be rolled from adhering to the roller.

The table 10 shown in FIG. 1 is installed on a pedestal (not shown) of a joining apparatus, and a back par 14 is fixed approximately at the center of the table 10. Further, the rolling roller 12 is connected to the table 10
The shaft 16 is rotatably supported by a shaft 16. Further, the rolling roller 12 is installed so as to be able to be pressed against the table 10 by a cylinder 20,
The gear 24A is rotated by the driving force of the motor 18 via the chain 22 and the gear 24B.

Next, the operation of the apparatus for joining band-shaped metal plates constructed as described above will be explained.

First, the band-shaped metal plates 26 to be joined are pressed and fixed on the table 10 by a pressing jig 28 so that the center portion to be rolled is positioned on the back par 14. Next, the rolling roller 12 is rolled down by the cylinder 20 to press and fix the band-shaped metal plate 26. Next, when the motor 18 is driven, the rotation is transmitted to the rolling roller 12 via the gear 24A1 chain 22 and the gear 24B, and rolling is carried out with the center part to be rolled being sandwiched between the protrusion 12B and the back par 14. It will be done. The center portion to be rolled is rolled by the protrusion portion 12B while being pressed by the holding portion 12A. Since the shape of the tapered surface or curved surface 12C is transferred to the edge of the joint after rolling, the joint can be rolled smoothly.

FIG. 3 shows two recrystallized areas 32A and 32A formed in the welded joint when band-shaped metal plates 26 and 34 having different thicknesses are welded together.
32B, recrystallized 11'B52A and this recrystallized part 3
Band-shaped metal plate 26A and melting part 3 adjacent to 2A, respectively
A situation in which 2C is rolled using the joining apparatus described in FIG. 1 is shown.

First, the welded metal strip 26 is placed on the table 10.
It is fixed by a holding jig 28 on top.

Next, the rolling roller 12 is rolled down by the cylinder 20, and the rolled center portion is sandwiched between the back par 14 and fixed by pressure. Next, the vicinity of the center of the strip-shaped metal plate 26 to be rolled is as follows:
The table 10 is held down by the pressing portion 12A of the rolling roller 12.
The recrystallized portion 32A, the melted portion 32C1 and the tip portion 26A of the band-shaped metal plate 26 are simultaneously rolled by the protruding strip portion 12B. That is, the recrystallization part 32A
At the same time, the molten part 32C1 adjacent to this is the band-shaped metal plate 26.
The thickness of A is between the sections - (the thickness difference between these parts must be within 30%)
It can be done. Further, the joint portion can be rolled so that the thickness of the fused portion 32C becomes tapered due to the tapered surface or curved surface 12C. As described above, according to the joining device for band-shaped metal plates according to the present invention, since the part where the thickness of the joining part changes is processed into a smooth tapered or curved shape, it is possible to provide a joining part that is difficult to break. In addition, it is possible to maintain quality when applying the coating liquid. In addition, in butt or overlap welded joints, the difference in plate thickness at the fusion zone is tapered to reduce the difference in plate thickness near the recrystallized area, which has low repeated bending strength, thereby reducing stress concentration in the recrystallized area. At the same time, quality defects in the coating state can be prevented. .

In addition, the recrystallization part 32B1 on the side of the band-shaped metal plate 34
The same rolling as 32A, 32C, and 26A described above is also performed on the end portion 34A of 4 by the holding portion 12A.

Next, a comparison result of the coating state of the joint portion of the band-shaped metal plates joined by the present invention and the conventional joining apparatus will be explained.

The test samples were two aluminum plates, one with a thickness of 0.30 mm and a width of 200 mm, and the other with a thickness of 0.15 mm and a width of 200 mm.
ma + overlapped and TIG arc welded at a speed of 6 m/min to weld and join. After joining in this way, the sample was rolled with a 4 ms width protrusion ff1o and a 15 mm rolling roller to reduce the plate thickness difference near the recrystallized part that occurs on the 0.15 au++ aluminum plate side. Let Nα be 1.2.3.4. For samples Nα1, 2.3.4, the width of the tapered part of the protrusion is 0.15 m, 1.0 mm, and 2.0 ffiI! , rolled with a non-tapered rolling roller. All four types of samples were subjected to four coating tests. Figures 4(a) to (6) are the four tests A1.
B, CSD is schematically shown. In the figure, 36 indicates a coating device, and 38 indicates a coating liquid.

Table 1 shows the results of investigating the coating state after each test. The evaluation items are the presence or absence of air bubbles, the length of coating streaks when air bubbles are involved, the presence or absence of thick coating near the joint, ′
This is the length of the area where X painting occurs.

Table 1 As is clear from the results in Table 1, samples Nα1 to N113 rolled with rolling rollers with tapered surfaces were
It was found that test ASB, especially test B, had better coating suitability than sample Nα4 rolled with a non-tapered rolling roller.

Next, in the samples lJ [L 1 to Nα4, a rubber roll (φ600
), 22 rubber rolls (φ200), and 2 rubber rolls (φ180), respectively, and a pass roller passing test was conducted to compare the number of rotations until cutting. Table 2 shows the results.

As is clear from the results in Table 2, sample Nα1.2
It was found that it showed the same strength as the conventional sample demon 4. On the other hand, sample Nα3 is slightly inferior to sample k4 in its ability to pass through a web roll, but it is within a range that causes no practical problems. A similar effect can be obtained when the stepped portion is curved.

〔Effect of the invention〕

As explained above, according to the band-shaped metal plate joining apparatus according to the present invention, the stepped portion between the protrusion portion and the holding portion is formed in a tapered shape, thereby preventing the stepped portion from being transferred to the joining portion. Since this has been prevented, the effects of air bubble entrainment, etc. are eliminated, and the coating condition can be improved and the quality can be improved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a belt-shaped metal plate joining apparatus according to the present invention, FIG. 2 is a front view of main parts of a rolling roller according to the present invention, and FIG. A front view showing an embodiment of a bonding device, FIGS. 4(a) to 4(d) are schematic diagrams showing coating conditions in a coating test, and FIG. 5 is a front view showing an embodiment of a conventional band-shaped metal plate bonding device. , FIG. 6 is a front view showing an embodiment of a conventional joining apparatus for band-shaped metal plates. 12... Rolling roller, 12A... Holding part,
12B... Projection portion, 12C... Tapered surface or curved surface, 26.34... Band-shaped metal plate. Figure 3

Claims (1)

[Claims] Band-shaped metal plates are butted against each other or overlapped by a small amount and welded together, and the welded joint is held by a holding part having a first radius and a second radius larger than the first radius. A belt-shaped metal plate welding device for rolling a welded joint with the projection while pressing the belt-shaped metal plate with the pressing part using a roller consisting of a projection and a pressing part. 1. A joining device for band-shaped metal plates, characterized in that a stepped portion is formed in a tapered shape or a curved shape.