JPS592947Y2 - Multi-electrode automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a multi-electrode automatic welding device for automatically welding edge joints of thin plate structures and the like.

Conventionally, as shown in FIG. 1, a thin plate structure 4 in which notches 2.3 of different opening angles are provided alternately vertically and horizontally at the intersection of edge joints 1 that are butted together in a square pattern has been constructed such that the edge apex 1a is It is welded and assembled.

That is, in this welding method, a traveling cart 6 equipped with a welding torch 5 is run along the edge apex 1a of each square divided by the notches 2 and 3, and the edge apex 1a of each square is intermittently welded. It is something.

For this reason, every time the traveling trolley 6 approaches the next square, it is necessary to temporarily stop the traveling and welding operation, move the traveling trolley 6 to the first part of the edge joint of the next square, and then restart the traveling and welding operation. First, the welding efficiency was extremely poor and stable welding quality could not be obtained.

The present invention, as a result of various research conducted in view of the above points, provides a multi-electrode automatic welding device that can automatically weld edge joints of thin plate structures etc. with stable welding quality and extremely efficiently. .

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows a state in which a multi-electrode automatic welding device to which the present invention is applied is attached to an edge joint of a thin plate structure.

The main body of this multi-electrode automatic welding device 10 is formed of a pedestal 11 made of steel pipe or the like, and the pedestal 11 is attached to the outside of Tokiwa 31 via a stand 30, as shown in FIG. Two edge joints 1 of thin plate structure 12
3.13 are installed in parallel.

Here, the thin plate structure 12 is one in which edge joints 13 of thin plate members whose ends are bent at right angles are butted together in a grid pattern, and cutouts 13a and 13b with different opening angles are formed alternately vertically and horizontally at the intersections. It is.

A pair of guide rails 14.14 are attached to the circumferential surface of the pedestal 110 along its longitudinal direction.

The guide rails 14.14 are provided with locks 1 at predetermined intervals.
4a... is formed.

The locks 14 a are for detecting the distance between the parts of the object to be welded that are not to be welded, and
In the case of 2, the notch 1 formed in the edge joints 13, 13
3a and 13b correspond to this, and lock 14a...
The position of the notches 13a and 13b can be adjusted according to the spacing between the notches 13a and 13b.

Further, a traveling carriage 15 is attached to the guide rail 14.14 so as to be sandwiched between running wheels 15a, 15a on both sides thereof.

The mounting portions of the running wheels 15a, 15a are provided with sections 15b, 15b that come into contact with the locks 14a... on the guide rail 14.14.

The sections 15b and 15b are welding torches 21 and 21, which will be described later.
The welding torches 21, 21 are electrically connected to the locks 14a, and constitute a switch mechanism that stops the welding operation of the welding torches 21, 21 every time they come into contact with the locks 14a.

A drive motor 16 is mounted on the traveling trolley 15.

The drive motor 16 is connected to a rack gear lla attached to the circumferential surface of the pedestal 11 via a pinion gear 16a.

The carriage 15 runs on guide rails 14.14 by means of this drive motor 16.

Welding heads 18.18 are attached to both sides of the carriage 15 via arms 17.17.

Vertical adjustment screws 17a, 17a are provided at the connection between the arm 17.17 and the traveling carriage 15.

The arm 17.17 is connected to the vertical movement adjusting screws 17a, 17.
Its vertical position can be adjusted by a.

Lateral adjustment screws 18a, 18a are provided at the connection between the arm 17.17 and the welding head 18.18, so that the position of the welding head 18.18 can be shifted left and right. There is.

As shown in FIG. 3, the welding head 18 has first guide shafts 19b, 19b wound with first compression springs 19a, 19a.
The base body 20 is attached so as to be vertically movable.

A welding torch 21 is built into the base body 20.

Three guide rollers 23a, 23b, and 23C are attached to the lower surface of the base 20 so as to be movable left and right via a second guide shaft 22b around which second compression springs 22a and 22a are wound.

Two of the guide rollers 23a and 23b are designed to sandwich the welded object (edge joint 13, 13) from both sides thereof.

Another guide roller 23C has a welding surface (
It comes into contact with the helical top 13C).

As shown in FIGS. 4 and 5, the welding torch 21 is attached to a support plate 24a provided on the base body 20 via a detachable plate 24. An adjustment screw 25 and a position fixing member 26 are provided.

Further, the welding torch 21 can be moved from side to side by a left/right position fine adjustment screw 29 provided on the upper part of the base body 20.

A tungsten electrode 27 and an auxiliary shield wall 28 are provided at the tip of the welding torch 21.

A pair of cooling rollers 30, 30 are provided opposite the tungsten electrode 27.

The cooling roller 30.30 has one end attached to the base body 20 and the other end of a pair of oval-shaped holders 31.31, as shown in FIGS. 4, 6, and 7A and 7B. It is attached to the section.

Circulation pipes 30a, 30a through which cooling water flows are connected to the mounting portions of the cooling rollers 30.30.

Furthermore, two sets of opening gears 31 a and 31 b are provided at the ends of the holding bodies 31 and 31 attached to the base body 20 so as to shift the tips of their teeth to prevent paracracy when meshing. There is.

A spring member 31C is installed between the bent portions of the pair of abbreviated holding bodies 31.31.

This spring member 31C and opening gears 31a, 31b
The cooling roller 30.30 is connected to the object to be welded (edge joint 1
3.13) The welded part is securely clamped and cooled.

The welding operation of the multi-electrode automatic welding apparatus 10 configured as described above will be explained with reference to FIGS. 8A and 8B.

Two helical joints 13.As the traveling truck 15 runs on the stand 11 arranged in parallel between the two helical joints 13.
．． The guide rollers 23
The welding head 18.18 runs while holding the parts a, 23b, and 23C, and the welding torch 21.21 welds the edge tops 13C and 13C.

Then, one side of the welding torch 21 is connected to the notch 13 a section (X
position), the section 1 provided on the traveling trolley 15
5b is the guide rail 1 corresponding to this notch 13a.
4 to temporarily stop the welding operation.

At this time, the other welding torch 21 is still attached to the other edge top 1.
3 Continuing to weld C.

Then, this other welding torch 21 then cuts the notch 13b.
When reaching the position (Y position), the section 15b of the traveling carriage 15 similarly comes into contact with the lock 14a on the guide rail 14, and the welding operation is temporarily stopped.

Next, when the welding torch 21 passes through the notch 13b (Z position), the section 15b is locked again in the lock 14.
a, and the welding operation of the welding torch 21 is restarted.

During this time, the other welding torch 21 is still attached to the notch 13.
Since it is in section a, the welding operation is stopped and the vehicle continues to travel.

Then, at the point where it passes through the notch 13a (position W), the piece 15b similarly contacts the lock 14a and welding is restarted.

Thereafter, by repeating the same operation, a large number of notches 13a and 13b are formed at predetermined intervals to form a helical joint 13.
13 can be continuously and automatically welded without stopping the running of the traveling trolley 15.

As a result, welding of the edge joints 13, 13 of the thin plate structure 12 can be performed extremely efficiently.

Furthermore, even if there is a vertical difference between the hemlock tops 13C and 13C located before and after the notches 13a and 13b, the base body 20 to which the welding torch 21 is attached will be as shown in FIG.
While traveling on the edge top 13C, the first
Since the base body 20 is pushed up in the direction of the welding head 18 by the compression spring 19a, the base body 20 is in the notch 13.
When passing through parts a and 13b, the amount of push up (Δh
) by the spring action, and again the next edge crest 13
When it reaches C, it is gradually pushed up along the slope.

In this way, the base body 20 is always brought into contact with the edge top portion 13C with a predetermined pressing force via the guide roller 23C.

As a result, even if there is a step between the edge joints 13.13 located before and after the notches 13a and 13b, the distance between the welding torch 21 and the edge top 13C to be welded is kept almost constant. The arc of the welding torch 21 acts almost the same on both edge apexes 13C, making it possible to obtain extremely stable welding quality.

Furthermore, even if the edge joints 13 located before and after the notches 13a and 13b are shifted left and right by the width ΔW as shown in FIG. B and C in the same figure depending on the width (ΔW)
As shown in FIG. 2, the edge top portion 13C moves along the second guide shaft 22b and always welds the tip of the welding torch 21.
Can be set in the center of the city.

Furthermore, as shown in FIG. 11, if the edge joints 13 and 13 do not come into perfect contact but only touch at the apex at a certain angle θ, the cooling roller 30 provided near the tip of the welding torch 21 .30 are separated by the same amount on the left and right by opening gears 31a, 31a attached to the holder 31.31.

Since the welding torch 21 is set in advance to be flush with the axial center of the opening gears 31a, 31a, by opening the holder by the same amount to the left and right, the edge joint 13.
The tip of the welding torch 21 can be set at the center of the butt portion 13.

In this way, the welding torch 21 can be used even if the edge joint 13 is deviated by a certain width (ΔW) between the notches 13a and 13b, or even if the welding torch 21 is joined only at the apex with a certain opening angle ( Even in cases where the welding arc is always generated along the joint center of the edge joint 13, the edge top 1 which is the welding surface
3. Homogeneous welding can be performed on C.

In the above embodiment, a pair of guide rails 1'4 and 14 are provided on the circumferential surface of the frame 11, and two welding torches 21 and 21 are connected to each other.
Although the two edge joints 13.13 are welded at the same time, it is preferable to set the number of guide rails 14.14 and welding torches 21.21 as appropriate depending on the number of objects to be welded.

As explained above, in the multi-electrode automatic welding device according to the present invention, the base body containing the welding torch is attached to the welding head so as to be movable vertically and horizontally, and a switch mechanism is provided to control the welding operation of the welding torch. This method has remarkable effects such as being able to automatically weld edge joints of thin plate structures and the like with stable welding quality and extremely efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a conventional welding device welding a thin plate structure, FIG. 2 is a front view showing a multi-electrode automatic welding device to which the present invention is applied, and FIG. Enlarged view showing the welding head part of the multi-electrode automatic welding device shown in Fig. 2, No. 4
The figure is an enlarged view showing the base body attached to the welding head.
5 is a plan view of the base shown in FIG. 4, FIG. 6 is a perspective view showing the mounting mechanism of the cooling roller provided on the base, and FIG.
Figure A is a cross-sectional view of the base body shown in Figure 4 along the VIIA-VIIA line, and Figure B is a cross-sectional view of the base body shown in Figure 4.
8 is an explanatory diagram showing the welding operation of the multi-electrode automatic welding device shown in FIG. 2, and FIG. 9 is a sectional view taken along line Vll B.
10A to 10C are explanatory diagrams showing the vertical movement adjustment operation of the base body of the multi-electrode automatic welding apparatus, and FIG. 11 is an explanatory diagram showing the horizontal movement adjustment operation of the base body. FIG. 12 is an explanatory diagram showing the horizontal movement adjustment operation of the cooling roller, and FIG. 12 is an explanatory diagram showing the mounting position of the mount. 4.12... Thin plate structure, 5, 21... Welding torch, 10... Multi-electrode automatic welding device, 14... Guide rail, 15... Traveling trolley, 17... Arm member, 1
8... Welding head, 19 a... First compression spring, 1
9 b...first guide shaft, 20...base body, 21...
・Welding torch, 22 a...Second compression spring, 22 b
...Second guide shaft, Δh...Vertical fluctuation width of the base, Δ
W: Misalignment width of hem joint, θ: Opening angle of hem joint.

Claims (1)

[Scope of utility model registration request] a pedestal provided with a pair of guide rails, a traveling truck that is attached to both sides of the guide rails so as to be sandwiched between running wheels, and a welding head is attached to both sides of the traveling truck via arms, and The position of the connection part is adjustable, and the welding head is provided with a base body that is movable up and down via a first guide shaft around which a first compression spring is wound, and a second compression spring is wound around the lower surface of the base body. A multi-electrode device comprising: a guide roller attached so as to be movable left and right via a second guide shaft; a welding torch built into the base; and a switch mechanism for controlling welding operations of the welding torch. Automatic welding equipment.