KR20140146325A

KR20140146325A - Positioner for all position welding and work method using the same

Info

Publication number: KR20140146325A
Application number: KR1020130068806A
Authority: KR
Inventors: 권순도; 김상준
Original assignee: 대우조선해양 주식회사
Priority date: 2013-06-17
Filing date: 2013-06-17
Publication date: 2014-12-26

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a positioner for electric three-dimension welding and a working method using the same. A pair of support frames installed on the upper surface of the base frame so as to be spaced apart from each other with an interval therebetween; A pair of rotary plates rotatably fixed on the support frame and arranged to face each other; A fixed base which is integrally fixed by being connected across the rotation plates; A turntable rotatably disposed at a center of an upper surface of the fixing table through 360 rotation; And a lifting table provided on the upper surface of the base frame on the space between the support frames and capable of lifting and lowering.
According to the present invention, it is possible to provide a positioner that facilitates the welding posture when welding a large structure, thereby ensuring the ease of welding operation, thereby increasing productivity and, at the same time, eliminating the need to use a separate crane when turning over large structures And the effect of improving the work efficiency can be obtained.

Description

[0001] POSITIONER FOR ALL POSITION WELDING AND WORK METHOD USING THE SAME [0002]

Field of the Invention [0002] The present invention relates to a positioner for electric three-dimension welding and a working method using the same, and more particularly, to a positioner for an electric three- And to a working method using the positioner.

Due to the recent increase in the construction of large-scale offshore plants, not only is the thickness of the members used for the structure construction thick, the amount of welding work is large, but also difficulties are encountered in handling as heavy objects.

The drying method of these offshore plants is mainly composed of welding. In the posture related to welding, the speed of welding operation is high and the welding posture favorable for securing the quality is as follows: SAW (submerged arc welding) Welding speed can be increased by welding technique, which can increase the productivity of the structure.

Therefore, in order to apply the SAW technique to the welding work of a large structure composed of a thick member, it is necessary to make the welding posture shown below, but it is not easy for a large structure.

Particularly, in the case of large structures, it is required to work in a stationary table (normally 'plate' means a plate having a flat surface with precise leveling) for precise assembly. In this case, various welding postures are required, And also turnover work is performed in parallel.

Therefore, the welding efficiency is lowered and the workability is very poor.

Here, the welding posture has various welding postures such as the bottom view, the horizontal view, the vertical view, and the upper view according to the welding direction, and all of these postures are called electronic welding.

Further, as the peripheral technology relating to the welding posture and the positioner, there are disclosed the open patent application No. 2012-0063059, the open application specification application 2012-0004281, the public application application specification application publication 2013-0001446, and the like.

Nevertheless, the concept of a positioner capable of freely embodying electric arc welding in the case of welding large structures has not been disclosed, and a need for improvement has arisen.

The present invention has been made in view of the above-mentioned problems in the prior art, and it is an object of the present invention to provide a welding machine and method for welding a large structure such as an offshore plant, There is provided a positioner for an electric three-wire welding and a working method using the positioner, which can contribute to productivity improvement by improving the convenience of the welding work.

In addition, the present invention provides a positioner for an electric three-wire welding that can turnover of a large structure through a positioner that conveniently provides a welding posture without using a separate crane when welding a large structure, There is another purpose.

The present invention provides, as means for attaining the above object, A pair of support frames installed on the upper surface of the base frame so as to be spaced apart from each other with an interval therebetween; A pair of rotary plates rotatably fixed on the support frame and arranged to face each other; A fixed base which is integrally fixed by being connected across the rotation plates; A turntable rotatably disposed at a center of an upper surface of the fixing table through 360 rotation; And a lifting table provided on the upper surface of the base frame on the space between the support frames and capable of lifting and lowering.

The drive pinion is coupled to the motor shaft of the tilting motor fixed to the support frame and is configured to rotate the rotation plate. There are also features that.

In addition, the rotary plate has a plurality of fixing holes passing through the thickness of the plate and spaced at predetermined intervals in the radial direction, and the supporting frame is further provided with a locking cylinder having a locking king pin inserted into and detached from the fixing hole, As shown in FIG.

In addition, the fixing holes are formed at intervals of 45 degrees along the radial direction of the rotary plate.

In addition, a shaft having the same shaft center as the rotation center of the turntable protrudes on the lower surface of the fixing table, and the shaft is further provided with a weight balance capable of adjusting the center of gravity.

Further, an installation groove is formed on the upper surface of the base frame between the support frames, and the lifting table is also provided on the installation groove.

Further, the lifting table is also characterized in that a plurality of height adjusting arms are linked to each other and are raised and lowered while being scissors-folded by a lifting cylinder.

According to another aspect of the present invention, there is provided a method for constructing a large-scale offshore structure, comprising: a target object fixing step of placing a lower structure among constituent parts constituting a large-scale offshore structure on a top surface of a turn table; A web welding step of fixing the turntable by tilting the turntable at an angle of 45 ° and dividing the turntable by 360 ° while the object is fixed, and welding the web to the lower structure in the lower view welding position; A weight balance adjusting step of adjusting the position of the weight balance considering the shape and weight of the lower structure when the web welding is completed; When the weight balance adjustment is completed, a reversal step of fixing the turn table by rotating the tilt by 180 °; When the reversal is completed, a bonding step of fixing the lower structure fixed to the turn table and the upper structure fixed to the lifting table after raising the lifting table; A welding step of welding the upper structure to the web welded to the lower structure while welding the lower structure to the lower welding position by rotating the turntable at a tilting angle of 135 ° and dividing the turntable by 90 ° to 360 °; When the welding is completed, the vertical table is tilted at 90 ° after the vertical stiffener is touched between the upper and lower structures, and the vertical stiffener is rotated to 360 ° by dividing the turntable by 90 °. Welding step; A preparation stage for repositioning the weight balance according to the shape and weight of the structure when the welded structure is completed, and placing the tread on the lifting table; When the preparation for separation is completed, a step of separating the welded structure is carried out by rotating the turntable by 180 ° tilting and placing the welded structure on the upper part of the tread that is placed on the lifting table. And a tress releasing step of lowering the lifting table and then moving the transporter downward to the tress to discharge the tress together with the welded structure when the separation is completed. to provide.

According to the present invention, it is possible to provide a positioner that facilitates the welding posture when welding a large structure, thereby ensuring the ease of welding operation, thereby increasing productivity and, at the same time, eliminating the need to use a separate crane when turning over large structures And the effect of improving the work efficiency can be obtained.

1 is an exemplary perspective view of a positioner for electric arc welding according to the present invention.
2 is an exemplary operational diagram showing an example of turnover of a positioner for electric arc welding according to the present invention.
Fig. 3 is an exemplary view showing an example of use of a positioner for electric arc welding according to the present invention.
4 is a flow chart showing a working method using a positioner for electric arc welding according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

The positioner for electric arc welding according to the present invention has a rotatable turntable and a structure capable of tilting, rotating and fixing the turntable at an angle of 0 to 45 degrees at an angle of 0 to 180 degrees. The view shown below maximizes convenience by allowing you to create a welding posture.

At this time, the turntable includes a table motor, a speed reducer, a swing bearing having a gear, and a brake.

A weight balance is formed on the opposite side of the turntable. By adjusting the position of the weight balance according to the weight of the structure formed on the turntable, the center of gravity of the rotating body when the turntable is rotated by 45 [ To reduce the load on the tilting motor.

In this case, the tilting of the turntable includes a tilting motor, a speed reducer and a pinion, and a large gear, and also includes a locking pin for fixing a tilting angle and a pinion for positioning a positioner And further includes a lifting table at the bottom.

Therefore, it is possible to reduce the cost and time because the completed large structure can be transported by using the transporter by placing the tread on the lifting table without turnover operation by the crane.

More specifically, as shown in FIG. 1, a positioner according to the present invention includes a base frame 100.

The base frame 100 is formed in a square block shape, and a square-shaped installation groove 110 is formed at the center of the upper surface.

A pair of support frames 200 are fixed to both sides of the upper surface of the base frame 100, more preferably both sides of the installation groove 110 are interposed therebetween.

In addition, a disc-shaped rotary plate 300 is rotatably fixed to each inner side surface of the support frame 200.

In addition, a fixing table 310 is fixed to the rotary plate 300 across the upper portion of the installation groove 110, and a turn table 320 is installed on the upper surface of the fixing table 310.

At this time, a lower flange (LF) (see FIG. 3) constituting a structure such as a deck support unit node is seated and fixed on the upper surface of the turntable 320.

Although not shown in the figure, the turntable 320 is rotatable 360 ° by a table motor (not shown) provided on the fixing table 310.

In addition, a shaft S coaxial with the turntable 320 protrudes from the lower end surface of the fixing table 310, and a weight balance 330 is provided on the shaft S.

The weight balance 330 is movable along the axis S to adjust the center of gravity thereof.

Particularly, since the weight balance 330 is designed in consideration of the load of the turntable 320, the weight balance 330 provides a sense of stability at the time of tilting as well as rotation of the turntable 320, and performs a function of maintaining balance.

A plurality of fixing holes 340 are formed in the rotation plate 300 at intervals of 45 degrees along the circumferential direction and locking holes 340 are formed in the fixing holes 340, Is omitted.

Therefore, when the locking pin 350 is inserted into the fixing hole 340 by advancing the locking cylinder 350 while rotating the rotating plate 300 by a predetermined angle, the turning table 320 is tilted at a predetermined angle, .

In this case, the locking cylinder 350 and the locking pin are installed symmetrically on both the rotary plates 300.

A gear 360 is formed on the circumferential surface of the rotary plate 300 and the gear 360 is coupled with the drive pinion 370 in a tooth-like manner.

At this time, the driving pinion 370 is fixed on the support frame 200, and is connected to a motor shaft of a tilting motor (not shown) so as to be rotatably driven.

In addition, a speed reducer may be further provided between the motor shaft and the driving pinion 370. If a speed reducer is provided, it is possible to provide a more stable and large force.

A height adjusting cylinder 380 is connected to the elevating cylinder so that the height adjusting arm 380 can be folded. The height adjusting arm 380 is provided at the upper end of the height adjusting arm 380, The lifting table 400 is fixed.

Therefore, when the ascending / descending cylinder is elevated, a plurality of link sections are connected in a scissors form so that the height adjusting arm 380, which performs a folding function, is unfolded so that the lifting table 400 is lifted. Conversely, when the lifting cylinder descends The height adjusting arm 380 is folded, and the lifting table 400 is lowered.

An upper flange UF (see FIG. 3) constituting a large structure is seated and fixed on the upper surface of the lifting table 400.

Accordingly, as shown in FIGS. 2 and 3, the positioner according to the present invention can turn the turntable 320 at an angle of 45.degree., And when rotated 180.degree., The positioner can be completely inverted.

The present invention having such a configuration can be used in the following working method.

As shown in the above-mentioned drawings and FIG. 4, first, an object fixing step S100 is performed.

In the object fixing step S100, the upper flange UF is mounted on the upper surface of the lifting table 400, and the lower flange LF is fixed on the upper surface of the turn table 320, And fixing and fixing.

If the lower flange LF and the upper flange UF are formed of a plate member, the lower flange LF may be fixed to the turntable 320) and the upper flange (UF) is formed on the upper surface of the lifting table (400).

In this case, the method of fixing the lower flange LF and the upper flange UF to the turn table 320 or the lifting table 400 may be various forms such as welding, pebbling, and riveting.

Thus, when the lower flange LF and the upper flange UF are prepared, a web installation step S110 is performed.

The web installation step S110 is a step of contacting the web to each of the flanges LF and UF. The turntable 320 is tilted at an angle of 45 °, .

In this manner, since welding can be performed in the below-described welding posture, welding is very easy, and particularly SAW welding can be facilitated.

When the welding is completed, the weight balance adjustment step (S120) is performed.

The weight balance adjusting step S120 is performed in order to balance the weight when the turntable 320 is tilted and rotated so that the stable operation can be performed. The weight balance adjusting step S120 may be performed in consideration of the shape and weight of the lower flange LF In order to adjust the position of the light source.

The reason for balancing the weight balance 330 by adjusting the position of the weight balance 330 is to reduce the load on the motor during rotation, which is the same in the final stage to be described later.

Subsequently, an inversion step (S130) is performed in which the turntable 320 is rotated and fixed by 180 ° tilting.

After the lifting of the lifting table 400 is completed, a grafting step S140 of fixing the lower flange LF fixed to the turntable 320 and the upper flange UF fixed to the lifting table 400, Is performed.

After the welding, the turntable 320 is tilted and fixed at 135 °, and the upper flange UF is welded to the web welded to the lower flange LF while rotating the turntable 320 by 90 °, The upper and lower structure welding step S150 is performed.

When the welding is completed, the vertical stiffener is contacted between the upper and lower flanges UF and LF, the turntable 320 is tilted by 90 °, and the turntable 320 is rotated by 360 degrees A stiffener welding step (S160) is performed in which the vertical stiffener is welded in the below-view welding posture.

Thus, when the welded structure is completed, the preparation of the balance balance 330 is carried out in accordance with the shape and the weight of the structure, and the preparing preparation step S170 of placing the tread on the lifting table 400 is performed.

When the preparation for separation is completed, the turn table 320 is rotated and fixed by 180 °, and the welding structure separation step S180 for placing the welding structure on the upper part of the tread installed on the lifting table 400 is performed.

When the separation is completed, the lifting table 400 is lowered, and the trolley discharging step (S190) is performed in which the transporter is moved under the trolley to discharge the trolley together with the welding structure.

The discharged tread is discharged in a subsequent process with the welded structure placed on it. Through this process, welding is performed in the following welding posture, so that the welding work is easy, convenient and quick.

100: base frame 200: support frame
300: spindle 400: lifting table

Claims

A base frame;
A pair of support frames installed on the upper surface of the base frame so as to be spaced apart from each other with an interval therebetween;
A pair of rotary plates rotatably fixed on the support frame and arranged to face each other;
A fixed base which is integrally fixed by being connected across the rotation plates;
A turntable rotatably disposed at a center of an upper surface of the fixing table through 360 rotation;
And a lifting table provided on an upper surface of the base frame on a space between the support frames and provided so as to be movable up and down.

The method of claim 1,
The rotation plate is formed with a gear on a circumferential surface, a drive pinion is coupled to the gear, and the drive pinion is connected to the motor shaft of a tilting motor fixed to the support frame to rotate the rotation plate Positioner for electronic welding.

The method of claim 1,
Wherein the rotary plate has a plurality of fixing holes passing through a thickness of the plate and spaced apart at regular intervals in a radial direction, and the supporting frame further includes a locking cylinder having a locking pin inserted into and detached from the fixing hole, And a position sensor for detecting the position of the position sensor.

The method of claim 3,
And the fixing holes are formed at intervals of 45 degrees along the radial direction of the rotary plate.

The method of claim 1,
Wherein a shaft having the same axial center as the rotation center of the turntable protrudes on the lower surface of the fixing table and a weight balance capable of adjusting the center of gravity is further provided on the shaft.

The method of claim 1,
Wherein an installation groove is formed in the upper surface of the base frame between the support frames, and the lifting table is provided on the installation groove.

The method of claim 6, further comprising:
Wherein the lifting table is configured such that a plurality of height adjusting arms are linked to each other and are raised and lowered while being scissors-folded by a lifting cylinder.

An object fixing step of placing a lower structure among the components constituting the large-scale offshore structure in the upper surface of the turn table, and fixing the upper structure on the upper surface of the lifting table;
A web welding step of fixing the turntable by tilting the turntable at an angle of 45 ° and dividing the turntable by 360 ° while the object is fixed, and welding the web to the lower structure in the lower view welding position;
A weight balance adjusting step of adjusting the position of the weight balance considering the shape and weight of the lower structure when the web welding is completed;
When the weight balance adjustment is completed, a reversal step of fixing the turn table by rotating the tilt by 180 °;
When the reversal is completed, a bonding step of fixing the lower structure fixed to the turn table and the upper structure fixed to the lifting table after raising the lifting table;
A welding step of welding the upper structure to the web welded to the lower structure while welding the lower structure to the lower welding position by rotating the turntable at a tilting angle of 135 ° and dividing the turntable by 90 ° to 360 °;
When the welding is completed, the vertical table is tilted at 90 ° after the vertical stiffener is touched between the upper and lower structures, and the vertical stiffener is rotated to 360 ° by dividing the turntable by 90 °. Welding step;
A preparation stage for repositioning the weight balance according to the shape and weight of the structure when the welded structure is completed, and placing the tread on the lifting table;
When the preparation for separation is completed, a step of separating the welded structure is carried out by rotating the turntable by 180 ° tilting and placing the welded structure on the upper part of the tread that is placed on the lifting table.
And a tress releasing step of lowering the lifting table and then moving the transporter under the tress to discharge the tress together with the welding structure when the separation is completed.