JP2000271744A - Automatic welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To weld all welding positions in good condition by using one welding machine. SOLUTION: A wire supplying unit 2 is fitted to a carriage unit 1 automatically traveled on a track rail L through a fitting arm 13 having arbitrary length, and the end part of a positional adjusting bracket 21 is fitted so as to be freely turned to the other end part of the fitting arm 13 and also, a torch unit 3 is fitted so as to be freely turned to the other end part of the bracket. In this method, since the torch unit 3 can freely be turned to the wire supplying unit 2, etc., the torch unit 3 is positioned at the arbitrary angle to all welding positions and can be welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding machine for automatically performing welding of a steel structure in which it is difficult for a worker to directly perform welding work, for example, inside a reactor pressure vessel. is there.

[0002]

2. Description of the Related Art Generally, an automatic welding machine (TIG welding machine) for automatically welding a steel structure is often designed and manufactured according to a welding object. However, it is necessary to prepare a number of automatic welding machines corresponding to the parts to be applied.

For example, as shown in FIG. 5, an internal structure such as a shroud support plate a and a leg b is integrally welded to a reactor pressure vessel (RPV) inside a body c of the reactor pressure vessel (RPV). However, when these are to be welded by the automatic welding machine d, five types of automatic welding for performing welding at five locations such as the upper surface and the lower surface of the support plate a and the upper surface, the lower surface, and the side surface of the leg b are respectively performed. A welding machine d is required.

That is, in the conventional automatic welding machine d, as shown in the figure, a wire supply unit g and a torch unit h are integrally fixed to a truck unit f running on a temporarily provided track rail e. Since the welding angle and the reaching distance to the welded portion are constant, a special welding machine must be manufactured every time a welding location is different, which is a factor that increases the cost required for welding.

Therefore, the present invention has been devised in order to effectively solve such a problem, and an object of the present invention is to provide a new automatic welding machine capable of welding all welding locations with one welding machine. To provide.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention attaches a wire supply unit to a bogie unit that runs on a track rail via an attachment arm of an arbitrary length. An end of a position adjustment bracket is rotatably attached to the other end, and a torch unit is rotatably attached to the other end of the position adjustment bracket.

As a result, the position adjusting bracket rotates with respect to the mounting arm, and the torch unit can further rotate with respect to the rotatable position adjusting bracket, so that the position and direction of the torch unit can be freely adjusted. Can be adjusted. The distance between the bogie unit and the torch unit can be freely adjusted by arbitrarily changing the length of the mounting arm connecting the bogie unit and the wire supply unit.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of an automatic welding machine according to the present invention.

As shown in the figure, the automatic welding machine includes a bogie unit 1 which automatically travels on a track rail L by remote control, a wire supply unit 2 for supplying a welding wire Y and the like, and a supply unit from the wire supply unit 2. And a torch unit 3 for performing TIG welding on the welding section R by a welding wire Y or the like.

First, the bogie unit 1 has four running wheels 5, 5, 5, 5 on the back side of a rectangular bogie main body 4, and a drive unit 6 at the center thereof. This is engaged on the track rail L by the four running wheels 5, 5, 5, and 5, and the pinion 7 of the drive unit 6 meshes with the rack 8 of the track rail L, so that it can run in either left or right direction. It has become.
The cart unit 1 is also provided with a joint unit and a connector unit (not shown) for connecting a cable or the like for remote control.

Next, the wire supply unit 2 is composed of a wire spool 9, a wire straightening unit 10, a wire feeding unit 11, a wire adjusting electric unit 12, and the like. 1
It is designed to be detachably attached to the side. That is, the wire supply unit 2 is
The mounting arm 13 is removably attached to the mounting arm 13 via an interface, and the end of the mounting arm 13 is removably attached to the bogie unit 1 with mounting bolts or the like.

On the other hand, the torch unit 3 is
5, arc monitoring unit 16, wire adjustment unit 1
7, a lighting unit 18, an AVC unit 19, a left and right adjustment unit 20, and the like, and are detachably attached to the attachment arm 13 via a strip-shaped position adjustment bracket 21.

The strip-shaped position adjustment bracket 21
Is provided with through holes 23, 23 having slits 22, 22 formed at both ends, respectively.
2 are provided with fastening bolts 24, 24 for adjusting the gap of the through hole 23, as shown in FIG.
A rod-shaped mounting pin 25 extending from the end of the mounting arm 13 is inserted into one of the holes and rotatably pin-connected, and the left and right adjusting unit 20 at the end of the torch unit 3 is inserted into the other through hole 23 side. The mounting pin 26 is inserted and rotatably pin-connected.

That is, the position adjusting bracket 21
Is rotatable left and right with respect to the mounting arm 13 about the mounting pin 25 on the mounting arm 13 side, and
The torch unit 3 is configured to be rotatable with respect to the position adjustment bracket 21 about the mounting pin 26 as an axis.

Therefore, in the automatic welding machine of the present invention thus constructed, as shown in FIG. 3, the tip of the torch portion 15 of the torch unit 3 is attached to the mounting arm 13, that is, the bogie unit 1 and the wire. Since it is continuously rotatable in both the left and right directions with respect to the supply unit 2, the tip of the torch part 15 can be positioned at the welding work part R at an arbitrary angle. In addition, since the position adjustment bracket 21 itself is also rotatable with respect to the mounting arm 13, the rotation of the position adjustment bracket 21 itself and the rotation of the torch unit 3 can be combined as shown in FIG.
As shown in (A), the tip of the torch portion 15 is fixed at a predetermined position over a wide range from the welding portion R located on the vertical wall on the track rail L side to the welding portion R located on the vertical wall on the opposite surface. Can be positioned at an angle. The rotation of the position adjustment bracket 21 and the torch unit 3 and the fixing thereof are performed by slits 22 and 22 of the position adjustment bracket 21.
Can be easily adjusted by adjusting the gap with the fastening bolts 24, 24 penetrating through.

Further, the mounting arm 13 for connecting the carriage unit 1 and the wire supply unit 2 is detachably mounted on the carriage unit 1 side. By preparing a plurality of them for each, and selecting and mounting an arbitrary mounting arm 13, it becomes possible to arbitrarily adjust the distance from the bogie unit 1 to the wire supply unit 2, that is, the torch unit 3. For example, as shown in FIG.
By replacing this mounting arm 13 with a longer one,
Even if the distance between the truck unit 1 and the torch unit 3 is long, and the distance from the track rail L to the welding section R is long, it can be easily handled.

As described above, in the automatic welding machine of the present invention, two rotating parts are formed from the bogie unit 1 traveling on the track rail L to the torch unit 3, and each can be freely rotated. Therefore, the torch unit 3 can be adjusted in all directions, and the distance can be freely adjusted. Therefore, regardless of the position of the track rail L, welding is performed on all welding portions. It becomes possible.

[0019]

In summary, according to the present invention, the following excellent effects can be exhibited.

Since two rotating portions are provided between the bogie unit and the torch unit, the direction and the distance of the torch unit can be freely adjusted.

The distance between the bogie unit and the torch unit can be freely adjusted by changing the length of the mounting arm connecting the bogie unit and the wire supply unit to an arbitrary length.

As a result, regardless of the position of the track rail or the bogie unit, it is possible to reliably perform welding on all welded portions.

As a result, it is possible to reliably perform welding on all the welded portions by one welding machine, so that it is not necessary to design and manufacture a separate automatic welding machine for each welding location as in the related art. In addition, the welding cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an automatic welding machine according to the present invention.

FIG. 2 is a front view in the traveling direction showing an embodiment of the automatic welding machine according to the present invention.

FIG. 3 is a front view in the traveling direction showing the operation of the automatic welding machine according to the present invention.

FIG. 4 is a side view showing another embodiment of the automatic welding machine according to the present invention.

FIG. 5 is a conceptual diagram showing a welding operation state of a conventional reactor pressure vessel by an automatic welding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bogie unit 2 Wire supply unit 3 Torch unit 13 Mounting arm 21 Position adjustment bracket L Track rail R Welding part

Claims (1)

[Claims] 1. A wire supply unit is attached to a bogie unit running on a track rail via an attachment arm of an arbitrary length, and an end of a position adjustment bracket is rotatably attached to the other end of the attachment arm. An automatic welding machine wherein the torch unit is rotatably attached to the other end of the position adjusting bracket.