JP2750010B2 - Automatic welding method for steel structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically welding steel structures.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view showing the construction of a general steel structure. First, a plurality of columns 1 are built, and a beam 2 is passed over the columns 1 with bolts not shown. After temporarily tightening and adjusting the verticality, horizontality, etc., fully tighten. Further, a deck plate 3 is laid on the upper surface of the beam 2 to temporarily finish the floor surface. And when building the upper floor on this,
The next pillar 1 'is joined to the existing pillar 1, and the above procedure is repeated. FIG. 5 is an explanatory view showing how to join the columns by welding.

[0005] That is, as shown in FIG. 5A, the next pillar 1 ′ is set on the existing pillar 1 and the welding 21 is performed by manual or semi-automatic welding.
5B is performed over the entire thickness of the pillars 1 and 1 'as shown by the dashed line in FIG.
As shown in (C), a tab plate 22 having the same groove is provided outside the columns 1 and 1 ', and welding is performed including the tab plate 22 as indicated by arrows, thereby forming a weld start end and a weld end. Measures are taken to prevent easy defects.

[0004] FIG. 5 (D) is shows its welding procedure, first over grinder cut and tab plate 22a portion was welded to the direction of L _1, followed by L ₂ tabs after welding direction plate 22b Cut out the part and grind it. Such an operation is performed over all four corners. FIG. 5
(E) is shows a method different from the method according to the tab plate 22, first welding L in _one direction to i point position, then welded to the L ₂ direction until j point position, the end corner portion L ₃ in which it finished welded to direction.

[0005] However, in such a method, a large amount of work is required for attaching and cutting the tab plate and other incidental work, which requires a long working time, is inefficient, and requires a manual operation including a semi-automatic method. However, it depends on the skill of the welding operator, and in particular, horizontal welding in the field leads to poor quality due to poor working environment such as on a scaffold.

[0006] Furthermore, the setting accuracy of the joint portion of the column cannot be made so high that the groove condition varies each time. Therefore, it is difficult for the welding operator to adjust the welding condition, and the manual method requires one welding operation per worker. Since the welding is performed by the torch, the efficiency is low, and the arc time ratio, that is, the ratio of the true welding time to the total working time is low due to fatigue.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances. In welding and assembling columns of a steel structure, there is no additional work such as attaching a tab plate, thereby improving work efficiency. As well as performing manual welding instead of manual welding, the quality is stable without being affected by the skill, working environment, and setting accuracy of the pillar, etc.
It is still another object of the present invention to provide an automatic welding method for a steel structure in which a plurality of welding machines can be operated at the same time to improve work efficiency.

[0008]

For this purpose, the present invention raises an upper floor structure on which a welding power source and a crane are mounted by using temporary columns, and then sequentially moves the columns constituting the structure from a lower region to an upper region. In addition welding assembly, a setting step of placing a rail mounted on a base truck traveling on the floor surface around the periphery of the existing pillar and mounting a welding bogie equipped with a welding device and a position detecting device on the rail, A teaching step of detecting the positional relationship between the welding bogie and the column by the position detecting device and setting welding conditions to the welding bogie, and moving the welding bogie along the rails and moving the welding bogie along the rail to the existing column and the next column. A playback step of automatically welding the pillars and a preparation step of pulling the base trolley and the welding trolley up to the upper region by the crane and transferring the same are sequentially performed. And wherein the door.

[0009]

According to the automatic welding method for a steel structure of the present invention, a rail is installed on the outer periphery of an existing pillar by one-touch operation, and a welding bogie is installed on the rail so that it can run freely. Is automatically detected, welding conditions are set, and then the next column is automatically welded to the existing column according to the set welding conditions. When the welding is completed, the base trolley and the welding trolley are moved to the upper zone, and the above operation is repeated according to the construction procedure of the structure.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for carrying out the method according to the present invention; FIG. 2 is a front view of a steel structure provided with the apparatus; FIG. 3 is an explanatory diagram of teaching playback in the present method.

In FIG. 1 and FIG. 2, after the beam 2 is put over the existing column 1 and the deck plate 3 is laid,
Prior to automatically welding the next pillar 1 'on the rooftop, the rooftop floor 4 on which the welding power source 5 and the crane 6 are mounted is raised and fixed by the outer temporary pillar 1a as shown in FIG.

The details of an apparatus for automatically welding the existing column 1 and the next column 1 'will be described with reference to FIG. 1. The base cart 7 is a cart for transporting equipment, and the deck plate 3 has a highly uneven surface. Endless track 8 so as to be able to travel freely on a surface of the vehicle, and a rail 9 provided on the front surface of the endless track 8 and surrounded by the outer periphery of the column 1 and capable of opening and closing left and right. The rail 9 is operated by a clamp handle 10 so that the rail 9 can be installed in a one-touch manner, and has a gap adjusting mechanism with the column 1 and a horizontal plane adjusting mechanism.

The base cart 7 is provided with a welding wire supply device 11, a control panel 12, and an equipment storage 13, and a welding power source and a control power source are supplied from the rooftop floor 4 via an extendable cable 14. , And the operation switch 15
The vehicle is driven by the built-in battery by the operation of.

One or a plurality of welding carts 16 are mounted on the rail 9, and the welding carts 16 are driven by, for example, a rack and pinion type or a friction roll type driving mechanism, and are linearly moved along the rails 9. The entire circumference of the column 1 can be automatically welded by the mounted welding torch 17 while continuously traveling the section and the corner. Welding trolley 1
3, a position detecting device 18 is mounted on the rail 9. The position detecting device 18 detects a relative position between the welding cart 16 or the welding torch 17 on the rail 9 and each part of the column 1 and performs welding. The position detection procedure will be described with reference to FIG.

That is, when the next pillar 1 ′ to be joined is installed on the upper part of the existing pillar 1, the welding carriage 16 is moved on the rail 9, and the position detector 18 moves the welding point from the reference point o to the welding point. For example, position vectors (Xa, Ya, Za), (Xb, Yb, Zb), (X
c, Yc, Zc)... These detected values are input to a control device (not shown) together with other data such as the plate thickness, and welding conditions are set. Thereafter, the welding trolley 16 performs automatic welding while continuously traveling on the rail 9 according to the above welding conditions.

Next, a process of automatically welding the existing column 1 and the next column 1 'by such an apparatus will be described.

(1) When the next pillar 1 'to be joined is placed on the upper part of the existing pillar 1, the operation switch 15 is first operated to move the base carriage 7 to approach the pillar 1 in the setting step. Then, after the rail 9 is wound around the pillar from the left and right by operating the clamp handle 10 and arranged,
Adjust the gap with the pillar 1, adjust the level of the rail surface, etc.
Further, a welding cart 16 is mounted on the rail 9.

(2) Subsequently, in a teaching process, the welding cart 16 is moved along the rail 9 to move the
The position coordinates from the reference point o to the main points of the welding location, for example, points a, b, and c, are detected by the position detecting device 18 installed at 6, and the welding conditions are set based on the detected values.

(3) After the welding conditions are set, the wire feeder 11 is operated in accordance with the welding conditions in a playback step for automatic welding.
Is moved along the rail 9 and the entire circumference of the column 1 is automatically welded by the welding torch 17.

(4) When welding is completed, in a preparation step, the rail 9 is opened from the column 1, the cable 14 and other gas hoses (not shown) are cut off from the base carriage 7, and the vehicle is moved to the next column to be welded on the same floor. Move and perform the work. When all the work on the same floor is completed, the base trolley 7 and the welding trolley 16 are lifted to the upper floor by the crane 6 and transferred to prepare for the next work. As described above, all the steps when the rooftop floor 4 is fixed to the outer temporary pillar 1a are completed.

When the welding with the outer temporary columns 1a is completed, the rooftop floor 4 is further raised by the inner temporary columns 1b shown in FIG. go. In addition, as shown in FIG. 2, the number of base carts 7 is appropriately selected according to the scale of the steel structure or the number of columns 1 to improve efficiency.

Thus, according to this method, the existing pillar 1
The rail 9 is surrounded by a one-touch operation on the outer periphery of the trolley, and a welding trolley 16 is mounted thereon, and the position detecting device 18 provided on the welding trolley 16 detects a relative position with respect to the column 1 to set welding conditions. Then, the entire circumference of the existing column 1 and the next column 1 'is automatically welded while the welding cart 16 travels along the rail 9 according to the welding conditions. Therefore, the attendant work such as mounting a tab plate, which has conventionally been large, has been greatly reduced and the efficiency has been improved, and the automatic welding has been adopted in place of manual welding. The quality is stable without being affected by the setting accuracy of the, and the arc time ratio is greatly increased. Further, by operating a plurality of base carts 7 and welding carts 16 simultaneously according to the situation, it is possible to achieve higher efficiency.

[0023]

In summary, according to the present invention, after the upper floor structure on which the welding power source and the crane are mounted is raised by the temporary pillars, the pillars constituting the structure are successively added from the lower area to the upper area to form a welding assembly. In doing so, a setting step of arranging a rail equipped on a base truck traveling on the floor surface around the existing pillar and mounting a welding cart equipped with a welding device and a position detecting device on the rail, A teaching step of detecting the positional relationship between the welding bogie and the column by the device and setting the welding conditions to the welding bogie, and moving the welding bogie along the rail to form the existing column and the next column according to the welding conditions. By sequentially constructing the playback process of automatic welding and the preparation process of pulling up the base bogie and welding bogie to the upper area by the crane and transferring them. In welding and assembling columns of steel structure, work efficiency is improved without additional work such as attaching tab plates, and fully automatic welding is performed instead of manual welding to improve the skill, work environment, Since the present invention provides an automatic welding method for a steel structure capable of stabilizing the quality without being affected by setting accuracy and the like and further improving the work efficiency by simultaneously operating a plurality of welding machines, the present invention is extremely industrially It is useful.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention;

FIG. 2 is a front view of a steel structure provided with the same device.

FIG. 3 is an explanatory diagram of teaching playback in the method.

FIG. 4 is a perspective view showing a point of a conventional welding method.

FIG. 5 is an explanatory view of a conventional welding procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing pillar 1 'Next pillar 1a Outside temporary pillar 1b Inner temporary pillar 2 Beam 3 Deck plate 4 Rooftop floor 5 Welding power supply 6 Crane 7 Base cart 8 Endless track 9 Rail 10 Clamp handle 11 Wire feeder 12 Control panel 13 Equipment storage 14 Cable 15 Operation switch 16 Welding trolley 17 Welding torch 18 Position detector

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Koichi Wada 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Laboratory (72) Inventor Yoshihiro Yuzaki Kannon Shinmachi 4 in Nishi-ku, Hiroshima City, Hiroshima Prefecture Hiroshima Research Institute, Mitsubishi Heavy Industries, Ltd., Chome 6-22 (72) Inventor Nagisa Minami 4-6-22 Kanon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Pref. Hiroshima Research Institute, Mitsubishi Heavy Industries, Ltd. (56) Reference 70286 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B23K 37/00 301 B23K 9/00 501 B23K 9/127 509 B23K 9/12

Claims (1)

(57) [Claims] After raising an upper floor structure portion on which a welding power source and a crane are mounted by temporary columns, the pillars constituting the structure are successively added from a lower region to an upper region, and run on a floor surface when welding and assembling. A setting step of placing a rail mounted on a base trolley around the periphery of an existing column and mounting a welding trolley equipped with a welding device and a position detecting device on the rail, and the welding trolley and the column by the position detecting device. A teaching step of detecting a positional relationship between the welding column and the welding condition and setting the welding condition to the welding truck, and a playback process of automatically welding the existing pillar and the next pillar by the welding condition while moving the welding truck along the rail. A step of preparing the base trolley and the welding trolley to the upper layer by the crane and transferring the base trolley and the welding trolley to the upper layer area. Law.