JPH0671433A - Device for automatically welding panel for steel structural material - Google Patents

Abstract

PURPOSE:To improve the stable welding quality and the welding efficiency by fitting plural articulated robots to be shiftable along the direction crossing at the right angle to the conveying direction on a gantry being shiftable along the conveying direction of a panel. CONSTITUTION:Rails 17 are arranged along the conveying direction of a steel plate 9 for flange in a welding process. The gantry 18 is arranged so as to be shiftable on the rails 17. Plural articulated welding robots 19 are fitted on the gantry 18 so as to be shiftable in the direction crossing at the right angle to the conveying direction. Each of the articulated welding robots 19 is independently worked according to the preset program to precisely weld the welding position given to itself. By this method, the efficiency of the whole line can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding apparatus for panels for steel structures, and more particularly to automatic processing of panels for steel structures such as bridges and automatic panels for steel structures installed in a welding line. The present invention relates to a welding device.

[0002]

2. Description of the Related Art Conventionally, for example, a box girder panel constituting a bridge as a steel structure has been manufactured as follows. The box girder is, as shown in FIG. 4, made up of a box-shaped structure in which webs 3 and 4 are vertically welded to both ends of the upper flange 1 and the lower flange 2, respectively. . The box girder shown in FIG. 4 is an example of a curved type.

For example, a web as a box girder panel is
As shown in FIG. 5, the web steel plate 6 was placed on the surface plate 5, the vertical stiffener 7 and the horizontal stiffener 8 were temporarily attached to the steel plate 6 at predetermined positions, and then the main stiffener 7 was manually welded to manufacture. .

[0004]

However, according to the above-mentioned conventional technique, there is a problem that it takes a long time to weld the box girder panel and the welding quality varies.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic welding apparatus for a steel structure panel, which can weld a steel structure panel in a short time and does not cause variations in welding quality.

[0006]

SUMMARY OF THE INVENTION The present invention is an automatic welding machine used in the main welding process of a panel in a steel structure panel automatic processing and welding line, wherein the panel is used in the main welding process. It is characterized in that it is composed of a gantry movable along the transport direction and a plurality of articulated welding robots mounted on the gantry movably along a direction orthogonal to the transport direction.

In recent years, facilities for automating the processing and welding work of box girder panels constituting a bridge as a steel structure have been constructed and have attracted attention. This equipment will be described with reference to the drawings. FIG. 1 is a schematic perspective view of automatic processing and welding equipment for a box girder panel.

In FIG. 1, A is an automatic tack welding process for automatically tacking the vertical ribs 10 to the flange steel plate 9 of the box girder panel, and B is a main welding process for the tacked vertical ribs 10. C
Is a strain removing step in which the strain generated by the welding of the vertical ribs 10 is taken by the strain removing machine 11, and D is a drilling step in which a hole is automatically drilled in a predetermined position of the steel sheet 9 after the strain removal. Then, in the next finishing step, the horizontal rib 13 is welded to a predetermined position of the perforated steel plate 9. Through these steps, the flange of the box girder panel is manufactured.

The automatic processing and welding equipment for the box girder panel shown in FIG. 1 has a web production line provided separately from the above-mentioned flange production line. In this web manufacturing line, a is a steel plate 6 for web of a box girder panel.
A welding process for automatically performing the main welding of the vertical stiffener 7 and the horizontal stiffener 8 temporarily attached to the robot by the multi-joint welding robot 14.
The strain removing step c and the step c are punching steps for automatically making holes in the strained steel plate 6 at predetermined positions by the punching machine 16. Through these steps, a web of box girder panels is manufactured.

The automatic welding apparatus for steel structure panels of the present invention is used in the above-described welding step B of the flange manufacturing line. An automatic welding apparatus for a steel structure panel according to the present invention will be described with reference to the drawings.

FIG. 2 is a schematic plan view showing an automatic welding apparatus for steel structure panels according to the present invention, and FIG. 3 is a schematic plan view showing the present invention.
It is a schematic front view which shows the automatic welding apparatus of the panel for steel structures.

As shown in the figure, the automatic welding apparatus of the present invention includes a gantry 18 which is movable on a rail 17 laid along the direction in which the flange steel plate 9 is conveyed in the main welding process.
It comprises a plurality of articulated welding robots 19 attached to a gantry 18 so as to be movable along a direction orthogonal to the transport direction.

The articulated welding robot 19 operates individually according to a pre-assembled program to accurately weld a welding point given to itself, but may contact an arm of another adjacent welding robot. Configured to not. A plurality of articulated welding robots 19 are installed in the main welding process because the welding process requires the longest time as compared with other processes, and therefore excellent welding efficiency is required.
By improving the welding efficiency, welding can always be performed with a constant takt time even when various box girder panels are carried in. In addition, by using a plurality of articulated welding robots 18, there is an effect that it is possible to easily back up in case of a failure.

[0015]

As described above, according to the present invention, by using a plurality of articulated welding robots in the welding process, stable welding quality can be obtained and the welding efficiency can be improved. Since this can be achieved, useful effects such as improvement of the efficiency of the entire line can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of automatic processing and welding equipment for a box girder panel.

FIG. 2 is a schematic plan view showing an automatic welding device for a steel structure panel according to the present invention.

FIG. 3 is a schematic front view showing an automatic welding device for a steel structure panel according to the present invention.

FIG. 4 is a partial perspective view of a box girder panel of a bridge.

FIG. 5 is a schematic perspective view showing a conventional method for welding a box girder panel.

[Explanation of symbols]

 1: Upper flange, 2: Lower flange, 3, 4: Web, 5: Surface plate, 6: Steel plate for web, 7: Vertical stiffener, 8: Horizontal stiffener, 9: Steel plate for flange, 10: Vertical rib, 11, 15: strainer, 12, 16: drilling machine, 13: lateral rib, 14: welding robot, 17: rail, 18: gantry, 19: welding robot.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tadaaki Kuwamura 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Atsushi Shikata 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Date Main Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. An automatic welding machine used for a panel main welding process in a steel structure panel automatic processing and welding line, the gantry being movable along a panel conveying direction of the main welding process. And a plurality of articulated welding robots movably attached to the gantry along a direction orthogonal to the transport direction, the automatic welding apparatus for a panel for a steel structure.