KR200292439Y1 - Overhead heating device with magnetic plate - Google Patents

Abstract

The present invention relates to an overhead heating machine (overhead heating machine), in the overhead heating device 11 for heating the back surface of the welding object in order to prevent deformation occurring in the welding object during the welding joining operation of the steel structure, At least one heating torch unit 13 for heating the back surface of the welding object 1, the bogie 15 on which the heating torch unit 13 is mounted, and the bogie 15 move along the back surface of the welding object 1. A drive wheel 17, and a drive motor 19 for powering the drive wheel 17, wherein the trolley 15 includes the total weight of the overhead heating device 11. On the contrary, there is provided an overhead heating device with a magnet plate, characterized in that a magnet plate 41 is held on the back surface of the object to be welded 1, thereby facilitating the handling and installation of the overhead heating device. Of It is not affected by the flatness, and it is effective to heat the back side of the welded portion while moving freely as well as the curved portion.

Description

Overhead heating device with magnetic plate

(Technology)

The present invention relates to an overhead heating machine (overhead heating machine), and more particularly, as an overhead heating device for heating the back side of the weld to prevent deformation occurring in the welding object during the welding joint operation of various steel structures, A trolley equipped with a heating torch is provided with a plate having a magnetic force, and the magnetic plate is provided with an overhead heating apparatus provided with a magnetic plate, which moves along the rear surface of the welding target while the trolley is held on the rear surface of the welding target. will be.

(Prior art)

Welding, one of the main means of joining steel components in the construction of various structures, including ships, has a connection efficiency of nearly 100%, saves materials, and also saves on construction costs. It is widely used due to its advantages.

However, since welding which melts steel materials by heat is to apply a large amount of heat locally to the welding site, the welding objects are not only locally heated rapidly but also cooled at different speeds. Therefore, weld shrinkage stress is generated at the weld seam, which eventually causes deformation of the final structure.

As a countermeasure for minimizing the welding stress of the welding object generated during the welding operation, a method of reducing the rapid temperature change of the welding part by heating the back side of the weld part with gas flame is performed. In the sense of working with the head in the sense of overhead heating, the device that performs this overhead heating mechanically is called an overhead heating device.

The overhead heating operation before the present applicant proposes an overhead heating device of Utility Model Registration Application No. 92-7024 (Publication No. 94-8659) filed April 27, 1992, is usually performed by an operator. Since it was common to carry the heating torch to the lower part of the welding object and to work in an upward position, the productivity of the work was very low due to the low heating precision and the high work fatigue, and the overhead heating of Utility Model Application No. 92-7024 was issued. The apparatus improves work productivity by performing overhead heating work by a movable trolley.

Figure 3 is a side open view showing a schematic configuration of the overhead heating device of Utility Model Registration No. 92-7024. As shown, the overhead heating device is equipped with a hydraulic cylinder 53 which is operated up and down with the hook pump 52 to one side of the overhead body 51 configured to be movable by the wheels 73, A plurality of folding plates 55 are fixed to the upper end of the cylinder 53 to be folded up and down by a plurality of shafts 54, the upper and lower ends of the folding plate 55 is connected by a vertical slide rod 59 The upper end of the slide rod 59 is connected to the horizontal rod 60, and a nut N is formed at the vertically extending end of the horizontal rod 60, and the nut has a level adjusting bolt B screwed thereto. A balance roller (67) is provided on the horizontal rod (60) to adjust the front and rear height by a fine adjustment handle (61), and the balance roller (67) has a traveling cart (68) equipped with a heating torch (69). And the heating torch 69 is mounted on the heating interval handle 72. The width is adjusted by this.

The conventional overhead heating apparatus described above can operate in a narrow space while moving the heating apparatus by the wheels 73, adjust the height of the bogie according to the height of the heating, and uniformly space the gap between the welding object and the heating torch. It was possible to maintain it, so that there was an effect of improving the heating quality.

However, since the conventional overhead heating apparatus adopts a method of moving along the floor 74 by the wheels 73, the conventional overhead heating device is frequently used depending on the level of floor flatness at the place where the device is mounted or obstacles around the work place. There is a problem that the work must be interrupted, and the problem of fixing the device is very complicated in reinstalling the overhead heating device to a new work place after the completion of the heating of one stroke.

The object of the present invention is to solve the problems of the conventional overhead heating apparatus described above, and the configuration of the apparatus is simple and easy to handle and install, and is not affected by the flatness of the ground, It is an object of the present invention to provide an overhead heating device capable of heating the back side of a welded portion while freely moving the curved portion.

1 is a front schematic view showing an example of an overhead heating apparatus provided with a magnetic plate according to the present invention.

Figure 2 is a side schematic view of Figure 1;

3 is a schematic side view showing a schematic configuration of a conventional overhead heating apparatus;

* Description of the symbols for the main parts of the drawings *

1: welding object (abacus) 3: vertical panel

5: welding part 11: overhead heating device

13: heating torch unit 15: bogie

17: drive wheel 19: drive motor

21: torch 23: torch holder

25: torch unit support 41: magnetic plate

An object of the present invention described above, in the overhead heating device for heating the back surface of the welding object in order to prevent deformation occurring in the welding object during the welding joining operation of the steel structure, at least one heating for heating the back surface of the welding object A torch unit, a bogie on which the heating torch unit is mounted, a drive wheel for allowing the bogie to move along the back of the welding object, and a drive motor for powering the drive wheel, wherein the bogie includes the overhead heating. It is achieved by an overhead heating apparatus provided with a magnet plate, characterized in that a magnet plate is included which maintains the total weight of the device on the back side of the object to be welded against gravity.

Hereinafter, with reference to the accompanying drawings will be described in detail for the overhead heating device provided with a magnetic plate according to the present invention. The following specific examples merely illustrate the overhead heating apparatus provided with the magnetic plate according to the present invention, but do not limit the scope of the present invention.

1 is a front schematic view showing an example of an overhead heating apparatus with a magnetic plate according to the present invention, Figure 2 is a side schematic view of FIG. FIG. 1 schematically shows a state in which an overhead heating device is used for welding a plurality of vertical panels 3 to a main plate 1 which is present in a large amount in manufacturing a block in a ship assembly process.

The overhead heating device 11 according to the present invention is a device for preventing deformation due to welding shrinkage stress of a welding object during a welding operation, and is to heat the back side of the welding portion of the welding object, as shown in the vertical panel. It is provided in the back surface of the main plate 1 to which 3 is welded, and consists of the structure containing the heating torch unit 13, the trolley | bogie 15, the drive wheel 17, and the drive motor 19. As shown in FIG.

At least one heating torch unit 13 is installed on the trolley 15, and as shown in FIG. 1, a plurality (two in FIG. 1) of vertical panels 3 on the main plate 1 by an automatic welding machine. In the case of welding at the same time, a plurality of heating torch units 13 can be mounted on one truck 15 so as to heat all the welding sites 5 at the same time. As the heating torch unit 13, a torch 21 that radiates a gas flame generally used in the related art is applied as it is, and the torch 21 is held in the torch holder 23. The torch holder 23 preferably has a structure capable of adjusting the vertical height of the torch 21.

The heating torch unit 13 is mounted to a movable trolley 15. For example, as shown in FIG. 1, the torch unit support 25 is installed on the trolley 15 so as to be movable and fixed from side to side, and the torch unit 13 is provided at both ends of the torch unit support 25. It can be mounted to move left and right. Mounting the torch unit support 25 and the torch unit 13 so as to be movable left and right suitably positions the position of the torch 21 of the torch unit 13 according to the welding position of the main plate 1 and the vertical panel 3. It is intended to be adjustable.

The trolley | bogie 15 is formed in a substantially box shape, and is equipped with the drive motor 19 mentioned later, the power transmission mechanism which transmits the driving force of a drive motor to the drive wheel 17, etc. here. Reference numeral 27 denotes a handle for fixing the support 25 to the trolley 15.

The trolley 15 is provided with a driving wheel 17 for moving the trolley 15 along the back surface of the main plate 1. As shown in FIG. 2, the drive wheel 17 is provided before and after the trolley 15 so that the trolley 15 can be balanced, and the trolley 15 is connected to the back surface of the welding object 1. It acts to move along.

The drive wheel 17 is driven by a drive motor 19 installed in the trolley 15. The driving force of the drive motor 19 is transmitted by the power transmission mechanism including the shaft 29 and the gear 31, and may cause the power of the motor 19 to be transmitted only to the front wheel or the rear wheel, for example, the front wheel and the rear wheel. May be connected to a power transmission mechanism such as a chain (not shown) to allow power to be transmitted to all drive wheels. The usable drive motor 19 is not particularly limited, but it is preferable to use a reversible deceleration motor capable of adjusting the rotational speed.

According to a feature of the present invention, the trolley 15 includes a magnet plate 41 which maintains the total weight of the overhead heating device 11 on the back surface of the welding object (main plate) 1 against gravity. The magnetic plate 41 may be included in the trolley 15 by making the bottom plate 43 itself of the trolley 15 facing the welding object 1 into a plate having magnetic force, or the trolley 15. The steel sheet may be included in the trolley 15 by manufacturing a magnetic plate 41 having no magnetic force or by fixing a plate-shaped magnet plate 41 on at least the bottom plate 43 of the trolley 15.

Since the trolley | bogie 15 is in the state facing the welding object 1 at predetermined intervals by the said drive wheel 17, the said magnetic plate 41 is not directly attached to the said welding object 1, either. However, since the magnet plate 41 is disposed so that the welding object 1 is located in the magnetic field formed by the magnet plate 41, the overhead heating device 11 is opposed to gravity by the magnetic force of the magnet plate 41. Will be kept behind.

The reason why the plate-shaped magnet is used to hold the overhead heating device 11 on the back surface of the welding object 1 is to maximize the attraction force by the magnetic force between the magnet plate 41 and the welding object 1. Of course, the magnetic plate 41 should have a sufficient magnetic force to support the weight of the overhead heating device (11).

Providing the magnetic force to the magnetic plate 41 can use the method of manufacturing the magnetic plate itself as a permanent magnet, and the invention which embeds a plate-shaped electromagnet in a trolley | bogie. The latter method is preferable because it is possible to supply and interrupt the magnetic force to the magnetic plate 41 as necessary, so that the overhead heating device 11 of the present invention can be easily dismantled from the main plate 1, but the magnetic plate 41 is permanently removed. Fabrication with magnets would be desirable in the sense that the device can be simplified.

Hereinafter, the operation of the overhead heating device 11 of the present invention will be described. First, the overhead heating apparatus 11 is hold | maintained by the magnetic force of the said magnetic plate 41 on the back surface of the welding object (main plate: 1) by which welding operation | work is made. Then, the torch unit support 25 is moved left and right with respect to the trolley 15 or the torch unit 13 is moved left and right so that the torch 21 of the torch unit 13 is exactly matched to the welding site. Next, the height of the torch 21 is adjusted to adjust the gap between the torch 21 and the main plate 1. Subsequently, the speed of the drive motor is appropriately adjusted to heat the back surface of the welded portion 5 by moving the cart 15 along the back surface of the main plate 1 by the drive wheel 17. At this time, when the welding part 5 is curved, it can cope by changing the advancing path of the trolley | bogie 15. FIG.

On the other hand, when the high heat emitted during the welding operation and the overhead heating operation is applied to the magnetic plate 41, the magnetic force reduction phenomenon may occur, it is possible to install a protective cover (not shown) around the magnetic plate 41.

According to the overhead heating device with a magnetic plate according to the present invention described above, the overhead heating device 11 compared to the magnetic force of the magnetic plate 41 provided in the movable cart 15 on which the heating torch unit 13 is mounted. ) Is heated on the back side of the welded part of the object to be welded while the trolley 15 is moved along the back side of the object to be welded, while the welding body (main plate; 1) is held on the back side, so that the configuration of the overhead heating device 11 is compact. Therefore, it is easy to handle and install, and is not affected by the flatness of the ground, and it is possible to heat the back side of the welded part while moving freely as well as the straight part. Therefore, the work productivity of overhead heating improves, and there exists an effect which can reduce the deformation | transformation by welding of a welding object.

Claims (3)

At least one heating torch unit for heating the back surface of the welding object 1 in the overhead heating device 11 for heating the back surface of the welding object in order to prevent deformation occurring in the welding object during the welding joining operation of the steel structure. 13, a trolley 15 on which the gil torch unit 13 is mounted, a driving wheel 17 to move the trolley 15 along the back surface of the welding object 1, and the driving wheel 17. A drive motor 19 for providing power, wherein the trolley 15 includes a magnet plate 41 which maintains the total weight of the overhead heating device 11 on the back surface of the welding object 1 against gravity. Overhead heating device provided with a magnetic plate, characterized in that it is included. The overhead heating apparatus according to claim 1, wherein the trolley (15) is provided with a torch unit support (25) on which the heating torch unit (13) is mounted. The overhead heating apparatus according to claim 1 or 2, wherein the magnetic plate (41) is a bottom plate (43) of a trolley (15).