JPH0813415B2 - Internal welding equipment for long rectangular tube materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal welding device for a long rectangular tubular material suitable for forming a long tubular material used for a boom of a crane.

[0002]

2. Description of the Related Art Conventionally, for welding long objects, there is a long object welding device described in Japanese Utility Model Laid-Open No. 60-160986. This device is mainly used to weld the outer plates of the hull to each other.The ends of the steel plates to be welded are made to abut each other, and the pair of guide rails are parallel to the welding line. Is a device for welding while moving a pipe equipped with a welding nozzle along this guide rail.

In addition, as an apparatus and method for automatically welding a long rectangular pipe, there are an automatic arc welding method described in Japanese Patent Laid-Open No. 4-17975 and a rectangular steel pipe described in Japanese Patent Laid-Open No. 4-91865. A manufacturing method or an angle member welding device described in Japanese Utility Model Laid-Open No. 3-42374 has been proposed.
Further, as a special welding device, there is a butt welding can welding device described in Japanese Utility Model Publication No. 58-137588, and a welding device for a vertical seam inside a steel pipe described in Japanese Utility Model Publication No. 58-137588.

[0004]

However, even though the former long object welding apparatus is suitable for welding the outer plates of a hull to each other, for example, for welding long objects such as a boom of a crane. Has many inconveniences. That is, in this device in which the guide rail is placed on the square tube material, it is difficult to fix the guide rail on the square tube material forming the square pipe. For this reason, welding cannot be performed while accurately maintaining the mutual position of the guide rail and the long object to be welded.

In addition, all of the other devices and methods for automatically welding a long rectangular tubular material are welding from the outside of the rectangular tubular material. However, crane booms and the like are increasingly required to have high support strength.
However, in the conventional welding means only on the outer side, the supporting strength is naturally limited, and it is impossible to weld the inside of the long rectangular tubular material which is attracting attention as a welding portion for reinforcement due to its space. Was said. In addition, crane booms and the like are desired to be lightweight with high support strength. However, since a large amount of spatter is generated during welding, if spatter remains attached to the inside of the boom as it is, the weight of the boom will be increased.

Therefore, the present invention was created in order to solve the above-mentioned problems. It is possible to automatically weld a long rectangular tubular member such as a boom of a crane from the inside, and at the same time, the rectangular tubular member can be welded. An object of the present invention is to provide an internal welding device for a long rectangular tube material capable of removing spatter generated inside.

[0007]

In order to achieve the above-mentioned object, the welding apparatus of the present invention forms a rectangular tubular member pedestal Q having a V-shaped cross section on which a long rectangular tubular member P is placed. Further, a guide roller 1 is provided for mounting the inner surfaces of the square tubular member P placed on the square tubular member pedestal Q, and a welding torch 2 for welding the inside edge of the corner portion of the square tubular member P is provided as a guide roller. 1 to form a welding head portion 10. Furthermore, the welding wire supply device 1
The connecting arm 11 is attached to the dolly 12 on which the drive unit 20 is mounted to form the drive unit 20, and the welding head unit 10 is connected to the drive unit 20. Then, the drive unit 20 is movably mounted on the guide rail portion 30 formed to extend linearly in the longitudinal direction of the rectangular tubular material P. At this time, the welding head 10 mounts the nozzle 3 for applying the spatter adhesion preventive agent around the weld and the rotary brush 4 for removing the spatter generated in the weld on the guide roller 1.

[0008]

According to the present invention, the rectangular tubular material receiving base Q having a V-shaped cross section mounts and fixes the long rectangular tubular material P. The guide roller 1 is placed on the inner side surface of the rectangular tubular material P and moves along the longitudinal direction. At this time, the guide roller 1 travels inside the square tube material P, and the welding torch 2 attached to the guide roller 1
Welds the inner edge of the corner portion of the square tube material P.

The welding head portion 10 in which the welding torch 2 is attached to the guide roller 1 is connected to the tip of the drive portion 20 traveling on the guide rail portion 30 via the connecting arm 11. And the nozzle 3 attached to the guide roller 1
Is for applying a spatter adhesion preventive agent to remove spatter generated at the welded portion by the rotary brush 4.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

The basic structure of the device of the present invention is that of a rectangular tubular material cradle Q.
, Welding head portion 10, drive portion 20, and guide rail portion 3
It consists of 0 and.

The rectangular tubular member pedestal Q has a V-shaped cross section on which a long rectangular tubular member P is placed. Therefore, the corner portion of the square tube member P is placed on the square tube member support Q with the corner portion facing down (see FIG. 3). The square tubular material P is a square tubular material P such as a boom of a crane, the outer side surfaces of which are welded.

The welding head 10 comprises a guide roller 1 and a welding torch 2 mounted on the guide roller 1.
Is placed on the rectangular tube P temporarily fixed and fixed in a V-shaped cross section, and moves along the longitudinal side edge of the rectangular tube P. The illustrated guide roller 1 is placed on a rectangular tubular member P fixed in a right-angled cross section, and a pair of front and rear bases 1A each having a right-angled triangular cross section is provided with a roller 1B. 1A is connected by a connecting frame 1C (see FIGS. 2 and 3). The welding torch 2 is a pair of bases 1A.
It is placed in between. At this time, by providing the tip portion of the welding torch 2 so as to be swingable left and right, it is possible to perform welding in a box using the bending material P1 (see FIG. 8). Furthermore, the front base 1A
A crocodile nozzle 3 is provided, and a spatter adhesion preventing agent is applied from the nozzle 3 to the periphery of the welded portion. Also,
The rear base 1A is provided with a rotating brush 4 for removing the spatter generated in the welded portion (see FIG. 2). This nozzle 3 is provided at the tip of the air hose 3A and the inhibitor pipe 3B, and applies the spatter adhesion inhibitor in the form of mist.

The drive unit 20 comprises a connecting arm 11 connecting the welding head 10 to one end, a carriage 12 connected to the other end of the connecting arm 11, and a welding wire supply device 14 mounted on the carriage 12. (See FIG. 1). Then, this dolly 12 is self-propelled back and forth with a built-in motor. Further, a forward / backward traveling switch of the dolly 12, a welding operation switch of the welding head portion 10, or switches for activating the nozzle 3 and the rotating brush 4 are provided near the dolly 12 (not shown). Further, the connecting arm 11 for connecting the driving unit 20 and the welding head unit 10 preferably has an inverted U-shaped cross section (see FIG. 5) or a V shape (see FIG. 6), and various cords 11A are provided on the connecting arm 11. The air pipe 11B and the like are provided. Further, the connecting arm 11 may be formed in a rectangular tubular material shape (see FIG. 7). Incidentally, reference numeral 11 in the drawing
C is a reinforcing shaft that reinforces the connecting arm 11.

The guide rail portion 30 mounts the drive portion 20 and allows the carriage 12 to travel in a straight line.
Run the dolly 12 according to the length of. In the illustrated guide rail portion 30, two parallel rails 21 are arranged on a pedestal 22 having a predetermined height, but the number of rails 21 and the height of the pedestal 22 can be set arbitrarily. To do.

[0016]

The present invention achieves the original object by being configured as described above.

That is, since welding is performed along the inner edge of the corner portion of the square tube member, even a long object such as a boom of a crane can automatically weld the long square tube member from the inside. Therefore, when forming a tubular body such as a boom, it is possible to weld from the outside and inside, and it is possible to form a long rectangular tubular material having extremely high strength.

Further, since the spatter can be removed at the same time as the welding process, it becomes possible to automatically perform the spatter removing work which has been a post-process until now.

As described above, according to the present invention, it is possible to automatically weld a long rectangular tubular material such as a boom of a crane from the inside, and further, to remove spatter simultaneously with the welding process. It has various beneficial effects.

[Brief description of drawings]

FIG. 1 is a side view showing a mounted state of the present invention.

FIG. 2 is an enlarged side view of an essential part showing a usage state of the present invention.

FIG. 3 is a front view showing a usage state of the present invention.

FIG. 4 is a perspective view showing a main part of the present invention.

FIG. 5 is a sectional view showing a connecting arm of the present invention.

FIG. 6 is a sectional view showing an example of another connecting arm.

FIG. 7 is a sectional view showing an example of another connecting arm.

FIG. 8 is a cross-sectional view showing welding in a box using a bending material.

[Explanation of symbols]

P Square tube material P1 Bending material Q Square tube material pedestal 1 Guide roller 1A Base 1B Roller 1C Connecting frame 2 Welding torch 3 Nozzle 3A Air hose 3B Preventive agent pipe 4 Rotating brush 10 Welding head 11A Code 11B Air pipe 11C Reinforcement Shaft 11 Connection arm 12 Bogie 13 Wheel 14 Welding wire supply device 14A Wire feeding cable 14B Wire 20 Drive part 21 Rail 22 Stand 30 Guide rail part

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B23K 37/02 301 C

Claims (1)

[Claims] 1. A rectangular tubular material pedestal having a V-shaped cross-section on which a long rectangular tubular material is placed, and a guide which is placed on the inner side surfaces of the rectangular tubular material placed on the rectangular tubular material pedestal. A roller is provided to form a welding head part in which a guide roller is equipped with a welding torch for welding the corner inner edge of a square tubular member, and a drive part in which a connecting arm is attached to a carriage on which a welding wire supply device is mounted. The welding head is connected to this drive, and the drive is movably mounted on the guide rail that is linearly extended in the longitudinal direction of the rectangular tubular material . The welding head prevents spatter adhesion around the weld.
Remove the spatter generated in the weld and the nozzle that applies the agent.
An internal welding device for a long rectangular tubular material, characterized in that a rotating brush to be removed is attached to a guide roller .