JPH08174221A - Vertical automatic welding equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the installation of welding equipment and significantly improve welding efficiency. [Structure] Stand 7 suspended by hoist 12
And two hoists 2 provided on the pedestal 7, chains 11 hung from each of the hoists 2 along the vicinity of the fillet welding line of the materials 8 and 9 to be welded, and attached to the lower end of the chain 11. And a welding machine body 1. Welder body 1
Is the traveling carriage and the material to be welded 8 mounted on the traveling carriage,
9 and a welding mechanism such as a welding torch 28 for fillet welding. The traveling trolley includes a guide wheel that rolls while guiding the surface of the welded material 8 on one side, a traveling wheel that rolls on the surface of the welded material 9 on the other side, and a welding machine body 1 to be welded. A magnet for attracting the material 9 is provided. By horizontally rotating the gantry 7 suspended by the hoist 12, it is possible for a single worker to weld the fillet welds at the four joint joint portions of the materials 8 and 9 to be welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical automatic welding apparatus which can be easily attached to a material to be welded and which can greatly improve welding work efficiency.

[0002]

2. Description of the Related Art In a large steel structure such as a ship, for example, a vertical fillet weld between a floor and a girder in a robot rear stage of a large assembly finishing welding stage of a double bottom block, a corner of a vertical work piece is welded. Since the length of meat welding becomes enormous, a vertical automatic welding device is used for welding such a portion.

In a conventional vertical automatic welding apparatus, a rail is fixed to a vertical surface of a material to be welded by a magnet or the like in parallel with the welding line, and a welding carriage that is loaded with a welding machine is mounted on the rail by a wire or the like. Welding was performed while pulling up along it.

[0004]

However, according to the conventional vertical vertical fillet welding apparatus, not only is it difficult to mount the rail for the welding carriage on the material to be welded, but also the rail is mounted parallel to the welding line. Without this, there was a problem that the welding carriage did not rise accurately along the welding line and fillet welding could not be performed well. Further, because of such a situation, it has been difficult for one person to use two or more welding devices.

Therefore, an object of the present invention is to eliminate the need for attaching a rail for a welding carriage to a material to be welded, to facilitate the installation of a welding device, and to improve welding efficiency significantly, thereby performing vertical automatic fillet welding. To provide a device.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a vertical automatic welding apparatus for automatically fillet-welding a joint portion of a material to be welded while ascending along a vertical material to be welded made of steel. A frame suspended from above the material to be welded by a hoist, one or more winding mechanisms provided on the platform, and the winding along the vicinity of the fillet welding line of the material to be welded A chain-like body such as a chain or a wire hung from each of the mechanisms so that it can be wound, and a welding machine body attached to the lower end of each of the string-like bodies, and the welding machine body is a traveling carriage. And a welding mechanism provided on the traveling carriage for fillet welding the material to be welded,
The traveling carriage is a guide wheel that rolls while guiding on the surface of one material to be welded, a traveling wheel that rolls on the surface of the other material to be welded that is connected to the material to be welded, It is characterized by including a magnet for attracting the main body of the welding machine to the other side of the material to be welded.

[0007]

[Operation] Use a hoist such as a crane to hang the frame,
It is placed and fixed on the upper ends of the materials to be welded that are connected to each other. A winding mechanism such as a hoist suspends the main body of the welder attached to the end of the cord-like body such as a chain from the gantry near the welding line of the material to be welded. Filling welding is performed while the main body of the welding machine is raised by the winding mechanism. The ascending welder body is equipped with a traveling trolley, and on the surface of the material to be welded by the guide wheel that guides the surface of one of the materials to be welded and the traveling wheel that rolls on the surface of the other material to be welded, Ascend while traveling. Regarding the welding profile, since the welding machine body is attracted to the other material to be welded by the magnetic force of the magnet, the welding mechanism does not deviate from the welding line.

If two sets of a winding mechanism, a cord-shaped body, a welding machine main body and the like are attached and the welding machine main body is arranged on both sides of the material to be welded, fillet welding can be simultaneously performed on both sides of the material to be welded. is there. Also, in the case of a cross joint member-shaped work in which the girder penetrates the floor, by rotating the gantry sequentially in the horizontal direction, even if the winding mechanism etc. is one set,
One operator (worker) can work at four points of the cross joint, and if four winding mechanisms are provided, the four points of the cross joint can be filleted at once without turning the gantry. Welding is possible and work efficiency is greatly improved.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. The present embodiment shows an example of application to a material to be welded (work) having a cross joint member shape in which a girder penetrates the floor in a large assembly finishing welding stage (robot rear stage) of a double bottom block. . Work size is girder thickness: 12-20mm, floor thickness: 1
2 to 30 mm, work height: about 3500 mm from the double bottom tank top 35. The girder and floor are made of mild steel, high strength steel, or the like.

FIG. 1 is a schematic front view showing an embodiment of an automatic vertical welding apparatus according to the present invention, FIG. 2 is a schematic perspective view, and FIG. 3 is a front view showing a pedestal portion of the automatic vertical welding apparatus according to the present invention. ,
FIG. 4 is a side view, FIG. 5 is a plan view, and FIG. 8 is a front view showing an entire welding stage equipped with the automatic vertical welding apparatus of the present invention.

As shown in the drawings, an automatic vertical welding apparatus A of the present invention is provided so that it can be suspended / raised via a pendant 13 by a plurality of gantry hoists 12 arranged on a saddle 33a of a gantry crane 33. Has been. On both sides of the vertical automatic welding device A, a CO ₂ semi-automatic feeding device 30 is similarly arranged so that it can be hung / raised by the hoist 12 and the pendant 13. Hoist 12
Is operated by the remote control operation panel 14.

The vertical automatic welding apparatus A has a frame 7 formed of a frame formed in a rectangular parallelepiped shape, two hoists 2 mounted by beams 18 in the frame 7, and hoisting / lowering can be performed on each hoist 2. The chain 11 is wound around and the welder body 1 is attached to the lower end of the chain 11. A rope 37 is attached to the gantry 7, and if the operator 38 holds the rope 37 and pulls it toward you,
The gantry 7 can be horizontally rotated. Further, a dummy plate 15 made of steel is attached to the lower part of the gantry 7.

Reference numeral 17 is a chain block constituting the hoist 2, and 16 is an AC servo of the chain block 17. By unwinding / winding the chain 11 by the hoist 2 having such a mechanism, the welding machine body 1 can be vertically moved.

The pedestal 7 is provided with a control panel 4 for controlling the operation of the welding machine body 1. The control panel 4 and the welding machine body 1 are connected by a control cable 5 connecting them. Reference numeral 6 is a cable reel provided on the gantry 7, and has a function of unwinding / winding up the control cable 5 according to the lifting operation of the welding machine body 1. Also, 3 is a control panel 4
It is a remote control operation panel of, and a string 19 is attached. The remote control operation panel 3 is suspended upward by a cable 21 via a torque reel 20, and if the operator 38 pulls the string 19 at the time of use, it descends. Further, the control panel 4 is connected to a transformer 23 via a control power cable 22. Reference numeral 24 is a cable reel for a control power cable provided near the hoist 16, and smoothly controls the length of the control power cable 22 according to the lifting operation of the gantry 7.

FIG. 6 is a side view showing the main body of the welding machine, and FIG. 7 is a plan view. The welding machine body 1 is mounted on a traveling carriage 10. The traveling carriage 10 attracts the traveling carriage 10 to the welded material side (floor 9 in the drawing) and two guide wheels 26 that roll while guiding on the surface of the welded material 8 or 9 (girder 8 in the drawing). Permanent magnet 41 for
And a plurality of traveling wheels 27 that roll on the surface of the material to be welded (floor 9). The traveling wheels 27 are made of, for example, rubber so that they can roll on the surface of the floor 9 without slipping. As shown in FIG. 6, the traveling wheels 27 rotate around the center at the four corners of the surface of the traveling carriage 10 on the floor 9 side. Axle 3 movably pivoted
At both ends of 9, one on the left and one on the right, a total of eight,
This makes it possible to adjust the steering in order to secure the copying. In FIG. 6, 43 is a photoelectric switch, and 25 is a photoelectric switch bracket.

A total of four permanent magnets 41 are attached by the traveling carriage 10. The number of permanent magnets 41 is not limited to four. Each magnet 41 is attached so as not to contact the surface of the material to be welded. By the action of the magnet 41, the welder main body 1 is attracted to the vertical welded material (floor 9) side, so that the welder main body 1 comes into close contact with the welded material (floor 9) via the traveling wheels 27 and separates from the welded material 9. There is no such thing. Further, the magnet 41 is used for the welding machine main body 1
When it is raised to the position of the gantry 7, it also has an action of adsorbing and fixing the welding machine body 1 to the dummy plate 15.

The welding torch 28 of the welding mechanism is detachable from the traveling carriage 10 by the welding torch gripping mechanism 40. A feeding device 30 can be connected to the welding torch 28 via a torch switch cable 29. The feeding device 30 is suspended by a hoist 12 of a gantry crane 33 by a chain 31 as shown in FIGS. 1 and 8.
A CO ₂ semi-automatic power source 34 is connected to the feeding device 30 via a cable 32.

The welding mechanism of the main body 1 of the welding machine comprises a welding torch 2
8, a weaving mechanism (not shown) for swinging the fillet weld width direction in a predetermined cycle, a vertical adjustment mechanism (not shown) attached to the weaving mechanism, and a left and right attached to the vertical adjustment mechanism. An adjusting mechanism (not shown) is provided.

Regarding the interference processing with the material to be welded (workpiece (stiffener)) of the device of the present invention, the welding torch is moved by delay control after the sensor detection at a place where the welding torch does not pass at the center copying position due to a narrow space. And let
It has the function of making some welding residue. With respect to this portion, the operator 38 semi-automatically welds the remaining welding portion. A proximity switch 36 has a function of stopping the welder body 1 when the welding profile is out of alignment. When the welding profile is off, the proximity switch 36 stops welding (runs the welding machine main body and stops the arc), and has a protective function of turning on the indicator lamp 42.

Next, a fillet welding operation procedure by the above-described automatic vertical welding apparatus of the present invention will be described.

A vertical automatic welding device having the following specifications (1) to (7) was used. (1) Welder body (2 types) Weaver / proximity sensor / limit switch equipped.

(2) Hoist (2 types) 1. Chain block equipped with AC servo motor 2. Rated load and lift: 120kg / 6M 3. Speed: welding speed; 50-500 mm / min idle running; 3000 mm / min

(3) Remote control operation panel (1 set) 1. Start / stop welding 2. Increase / decrease in welding speed 3. Downward / upward switching 4. Weaving speed / width / both ends / center stop time 5. Welder body (A front side / B back side) switching 6. Switching between low speed (welding) and high speed (idling) 7. Set the welding distance for downward welding (back to the welding start point after welding for a certain distance)

(4) Control panel (1 set) (5) Control cable (control panel to welder body) (2 sets)

(6) Cable reel (2 sets) (7) Frame (1 set)

The fillet welding operation procedure by the vertical automatic welding device having the above-mentioned specifications was as follows.

(1) The gantry crane 33 is remotely operated by an operation panel (not shown) of the gantry crane 33 to connect the gantry 7 and the semi-automatic wire feeder 30 to the cross joint connecting portion of the girder 8 to be welded and the floor 9. Aim at the upper part of the vicinity and lower it, 1m
Stop above position.

(2) By operating the pendant of the hoist 12 for lifting / lowering the gantry, the gantry 7 is moved up / down / left / right / front and back and placed on the upper end of the cross joint between the floor 8 of the material to be welded and the girder 9. Fix it.

(3) Pull the string 19 to bring the remote control panel 3 to the operator 38's hand. The remote control cable 21 passes through the torque reel 20, so that the remote control operation panel 3 can be freely raised / lowered.

(4) The remote control operation panel 3 is operated to quickly lower the two welding machine main bodies 1 (high speed / idle running).

(5) A semi-automatic 6 m torch 28 is attached to the welding machine body 1, and the torch switch cable 29 from the feeding device 30 is connected to the torch 28 (fully automatic).

(6) The guide wheel 26 is brought into contact with the girder 8, the traveling carriage 10 is attracted to the floor 9 side by the magnetic force of the magnet 41, the traveling wheel 27 is pressed against the floor 9, and the welder body 1 is fillet welded. Place at the weld of the wire.

(7) The welding current and welding voltage are adjusted by the remote control operation panel (not shown) of the semi-automatic feeder 30.

(8) Welding conditions such as welding speed, weaving speed, weaving width, weaving center, both end stop time, center stop time, etc. are designated by the remote control operation panel 3.

(9) Welding starts when all welding conditions are specified. The welder body 1 performs fillet welding while rising (low speed). Make sure that the weld beads are good and adjust the current / voltage if necessary. The welding machine operation sequence (running and weaving) is automatically welded based on the data input by the pendant operation,
Welding copying is performed by attraction by a magnet provided in the main body of the welding machine. As a result, one of the four fillet portions of the cross joint connecting portion between the girder 8 and the floor 9 is welded.

(10) To start welding on the opposite side (= back side) during the above-mentioned portion (front side = front side) welding, raise the pendant (remote control operation panel 3) to the upper part of the work, and place the string 19 on the garter 8. Throw to the other side beyond. And
The operator 38 turns to the opposite side (back side), and the above (4)-
Do the same procedure up to (8). This makes the girder 8
Welding of two of the four fillet portions of the cruciform joint connection portion between the floor and the floor 9 is completed.

(11) After the welding is completed by the limit switch 36, the main body 1 of the two welding machines automatically stops at the position of the upper dummy plate 15.

(12) After the welding is completed, the main body 1 of the welding machine is quickly lowered (high speed / idle running), the welding torch 28 is removed, and the torch switch cable 29 is returned to the semi-automatic type.

(13) Next, the welder body 1 is quickly raised again to the position of the upper dummy plate 15 (high speed / idle running) and fixed to the upper dummy plate 15 by the magnet 41 of the traveling carriage 10.

(14) The pedestal 7 is rolled up by operating the remote control panel 14 of the hoist 12, and the pedestal 7 is horizontally rotated 180 ° with a predetermined distance from the work.
Rotate the angle of. This work is handled by the rope 37 attached to the frame of the frame 7.

(15) Then, the above (2) to (4) and (6)
The work of (12) is similarly performed.

(16) After the welding of all four of the four fillet portions of the cross joint connecting portion between the girder 8 and the floor 9 is completed, the secondary side cable of the automatic wire feeder 30 is removed, After connecting to the semi-automatic wire feeder 30 and returning to the semi-automatic state, the gantry 7 is wound up to the position of the saddle 33a above the gantry crane 33 and stored.

[0043]

As described above, according to the present invention, it is possible to perform fillet welding without providing a rail on the welding line, and the fillet welded portion such as the cross joint connection portion between the girder and the floor has four. Even for a work that has some places, one operator can weld all places by rotating the gantry. Also, if multiple sets of welding machine body, winding mechanism, etc. are provided, it is possible to perform multiple welding at the same time. It is possible to weld in places, labor saving and time saving are achieved, and work efficiency is greatly improved.
Thus, an industrially useful effect is brought about.

[Brief description of drawings]

FIG. 1 is a mechanism configuration diagram showing an embodiment of an automatic vertical welding apparatus of the present invention.

FIG. 2 is a schematic perspective view showing one embodiment of the automatic vertical welding apparatus of the present invention.

FIG. 3 is a front view showing a pedestal portion of the automatic vertical welding apparatus according to the present invention.

FIG. 4 is a side view showing a pedestal portion of the automatic vertical welding apparatus according to the present invention.

FIG. 5 is a plan view showing a pedestal portion of the automatic vertical welding apparatus according to the present invention.

FIG. 6 is a side view showing a welder main body of the automatic vertical welding apparatus according to the present invention.

FIG. 7 is a plan view showing a welder main body of the automatic vertical welding apparatus according to the present invention.

FIG. 8 is a front view showing the entire welding stage provided with the automatic vertical welding apparatus of the present invention.

[Explanation of symbols]

A: Vertical automatic welding device 1: Welder main body 2: Welder main body hoist 3: Remote control panel 4: Control panel 5: Control cable 6: Cable reel 7: Stand 8: Girder 9: Floor 10: Traveling cart 11 : Chain 12: Frame hoist 13: Pendant 14: Hoist remote control panel 15: Dummy plate 16: AC servo 17: Chain block 18: Beam 19: String 20: Torque reel 21: Remote control panel cable 22: Control power supply Cable 23: Transformer 24: Control power cable cable reel 25: Photoelectric switch bracket 26: Guide wheel 27: Traveling wheel 28: Welding torch 29: Torch switch cable 30: Feeding device 31: Feeding device chain 32: CO ₂ Cable for semi-automatic welding power source 33: Gantry crane 33a: Dollar 34: CO ₂ semiautomatic welding power source 35: double bottom tank top 36: proximity switch 37: Rope 38: Operator 39: axle 40: welding torch gripping mechanism 41: Ei磁Magnet 42: indicator 43: photoelectric switch

Claims (1)

[Claims] 1. A vertical automatic welding apparatus for automatically filling a joint portion of a material to be welded while ascending along a vertical steel material to be welded which is connected to each other, in a vertical automatic welding device. A pedestal suspended from above, one or more winding mechanisms provided on the gantry, and each of the winding mechanisms can be wound along the vicinity of the fillet welding line of the material to be welded. It consists of a string-shaped body such as a suspended chain or wire, and a welding machine main body attached to the lower end of each of the string-shaped bodies, the welding machine main body being provided on the traveling carriage and the traveling carriage. , A welding mechanism for fillet-welding the material to be welded, the traveling carriage is a guide wheel that rolls while guiding on one surface of the material to be welded, and is coupled with the material to be welded. The running wheel rolling on the surface of the other welded material, A vertical automatic welding device, comprising: a magnet for attracting the main body of the welding machine to the other material side to be welded.