JPS6096385A - Joining method of metallic plate - Google Patents

Abstract

PURPOSE:To perform quickly welding with high quality by holding a preceding metallic plate and a succeeding metallic plate apart at a specified distance, irradiating a beam from a diagonal direction thereto to cut the plates then bringing the plates into tight contact with each other and irradiating the beam thereto from the same direction. CONSTITUTION:A preceding metallic plate 1 and a succeeding metallic plate 2 are clamped to each other apart at a specified distance then a laser beam 7a is irradiated from an upper diagonal direction by maintaining a specified angle to cut simultaneously the plates 1, 2. The end plate 8 of the plate 1 is mechanically removed. The plate 1 is thereafter moved downward and the plate 2 upward respectively at the same distance to bring the two plates 1, 2 into thoroughly tight contact with each other. A laser beam 7b is then irradiated thereto from exactly the same position as the laser beam 7a in the stage of cutting to weld the plates 1, 2.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention is directed to a continuous processing line for metal plates, for example, strip-shaped metal plates, in which two metal plates are treated with a high energy density beam.
For example, the present invention relates to a method for joining metal plates quickly and with high quality using a laser beam.

[Prior art]

Generally, as a method of joining metal plates of this type, the method explained in FIGS. 1 and 2 is known.

In the device shown in FIG. 1, first, as a first step, the parts of the leading metal plate 1 and the trailing metal plate 2 that are to be joined are brought into contact with each other and overlapped, and a laser beam 7a irradiated from above and perpendicularly to these metal plates is used to double the metal plates. The metal plates 1 and 2 are simultaneously cut by melting (FIG. 1a). After this fusing, the preceding metal plate 1 is advanced by a certain distance in the metal plate traveling direction, and the end plate 8 of the preceding metal plate 1 is
is removed mechanically by passing it between the metal plates 1 and 2 (FIG. 1b). Thereafter, the preceding metal plate 1 is returned in the opposite direction, taking into consideration the fusing gap created during fusing, and these metal plates 1 and 2 are brought into close contact and welded (joined) with the laser beam 7b. At this time, the laser beam 7b needs to be irradiated in a different direction (tilted) with respect to the laser beam 7a at the time of fusing (FIG. 1C).

In the one shown in Fig. 2, two metal plates 1 and 2 are placed side by side, and the laser beam 7a is divided into two beams to melt and cut these metal plates 1 and 2 parallel to each other at the same time. Mechanically remove plates 8 and 9 downward (Figure 2a)
. Thereafter, the trailing metal plate 2 is advanced in the advancing direction of the metal plate, taking into account the fusing gap 10.11, and the metal plates 1 and 2 are brought into close contact with each other and welded by the laser beam 7b. In this case as well, it is necessary to change the irradiation direction of the laser beam 7b with respect to the laser beam 7a during welding (Fig. 2b).
.

As can be seen from the above explanation, in the conventional method, in order to eliminate the end plate 8 of the preceding metal plates 1 and 2,
In order to prevent the adverse effects of 0. There was a drawback in that it was impossible to continuously connect the two metal plates 1 and 2 by welding in a moving state. Furthermore, it was necessary to change the irradiation direction of the laser beam 7a as shown in 7b, which caused problems in terms of accuracy and made it extremely difficult to perform high-quality welding.

[Summary of the invention]

This invention eliminates the above-mentioned conventional drawbacks,
When joining two metal plates, among these metal plates,
The vicinity of the tail end of the leading metal plate and the vicinity of the tip of the trailing metal plate are held parallel to each other so as to be overlapped vertically by a certain distance,
A beam with high energy density is irradiated from above diagonally at a certain angle to cut these two metal plates at the same time, and after eliminating the end plates due to this cutting, the above-mentioned The two metal plates are moved relative to each other in the vertical direction so that they are located on the same plane so that they are completely in contact with each other, and then the beam is irradiated from the same position as when cutting to join the two metal plates together. By doing so, 2
We not only weld metal plates quickly and with high quality,
The present invention provides a method for joining metal plates that allows continuous welding even in a moving state (non-stop state).

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 6, the same reference numerals as in FIG. 1 or 2 indicate the same or corresponding parts. Code 6゜4 is the main clamp, 5,
6 is an auxiliary clamp, and these clamps 3, 4, 5
．． 6, the leading metal plate 1 and the trailing metal plate 2 are clamped at a constant distance from each other (FIG. 3a). Next, a laser beam 7a is irradiated diagonally above the metal plates 1 and 2 at a constant angle to simultaneously melt and cut the two metal plates 1 and 2 diagonally (FIG. 3b). End plate 8 of preceding metal plate 1
is mechanically removed from between the two metal plates 1 and 2 clamped in parallel to below the trailing metal plate 2 (FIG. 3C). After that, the preceding metal plate 1 is moved downward, and the following metal plate 2 is moved downward.
Move the two metal plates 1 upward by the same distance, respectively.
, 2 are completely attached (Fig. 3d). Here, the two metal plates 1 and 2 are welded by the laser beam 7b, and the laser beam 7b is irradiated from exactly the same position as the laser beam 7a at the time of fusing described above (FIG. 3e).

Next, another embodiment will be described with reference to FIG.

FIG. 4 shows an arrangement in which continuous welding can be performed even in a moving state (non-stop state).

In this figure, the same reference numerals as in FIGS. 1 to 3 indicate the same or corresponding parts. Reference numeral 14 denotes a welding machine main body, and the welding machine main body moves at the same speed together with the leading metal plate 1 and the trailing metal plate 2 clamped by the respective clamps 3 and 4.5° 6. By rapidly performing the process described in FIG. 4, welding can be performed without stopping. In this case, the laser beams 7a,
7b is supplied from a separately installed oscillator 12 via a total reflection mirror 13.

〔Effect of the invention〕

As described above, when joining two metal plates, this invention separates the vicinity of the tail end of the preceding metal plate and the vicinity of the tip of the trailing metal plate by a certain distance. A beam with high energy density is irradiated from above diagonally at a constant angle to simultaneously cut these two metal plates, and this cutting causes After removing the end plates, the two metal plates are moved vertically so that they are on the same plane and are brought into close contact with each other, and then the beam is irradiated from the same position as when cutting. Since the two metal plates are to be joined together, it is necessary to move the two metal plates horizontally in order to eliminate the end plate of the preceding metal plate and to prevent the negative effects during welding due to the fusing gap. Since there are no cracks, welding can be done quickly. Moreover, since there is no need to change the irradiation direction of the laser beam midway through, high-quality welding can be performed.

[Brief explanation of drawings]

1 and 2 are configuration diagrams for explaining a conventional joining method, FIG. 3 is a configuration diagram for explaining one embodiment of the present invention, and FIG. 4 is a configuration diagram for explaining another embodiment. It is a diagram. 1: Leading metal plate, 2: Trailing metal plate, 7a, 7b: Laser beam, 8, 9: End plate. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa N (%J Q JJ ν N) -I N- Procedural amendment (voluntary) Indication of work Patent application No. 58-203080 Sanmei name Representative of the person who corrects the joining method of metal plates Hitoshi Katayama, Department Manager 5, "Claims" column of the specification subject to amendment. 6. Contents of the amendment The scope of claims section of Book 1 will be amended as shown in the attached sheet. Scope of the above attachment (Amendment) A beam with high energy density is irradiated from above the plate at a constant angle, thereby cutting these two metal plates at the same time, and after removing the end plate due to this cutting, the two metal plates are The metal plates are moved relative to each other in the vertical direction so that they are located on the same plane so that they are in close contact with each other, and then the beam is irradiated from the same position as when cutting to join the two metal plates to each other. A method for joining metal plates. (2) Claims characterized in that the leading metal plate clamped by the auxiliary clamp is mechanically removed from between two metal plates clamped in parallel to below the trailing metal plate. The method for joining metal plates according to item 1. 2. The method for joining metal plates according to claim 1, wherein: (4) The method for joining metal plates according to claim 1, wherein a laser beam is used as the beam having high energy density.

Claims (3)

[Claims] (1) The vicinity of the tail end of the leading metal plate and the vicinity of the tip of the trailing metal plate are held parallel to each other so as to be overlapped vertically by a certain distance, and these metal plates are held at a certain angle from an upper diagonal direction. irradiate the beam with a high energy density, thereby cutting these two metal plates at the same time, and after eliminating the end plate due to this cutting, so that the two metal plates are located in the same plane. A method for joining metal plates, characterized in that the two metal plates are joined to each other by moving the two metal plates relatively in the vertical direction to bring them into close contact with each other, and then irradiating the two metal plates with the beam from the same position as when cutting. (2) Claims characterized in that the leading metal plate clamped by the auxiliary clamp is mechanically removed from between two metal plates clamped in parallel to below the trailing metal plate. The method for joining metal plates according to item 1. (3) The method for joining metal plates according to claim 1, wherein a laser beam is used as the beam having high energy density.