KR100971329B1 - Submerged Arc Welding System - Google Patents

Abstract

The present invention relates to a submerged arc welding apparatus, which includes a power supply unit 10, a wire feeding device 20, a carriage 30 equipped with a torch and a flux hopper 32, and a guide rail 40. Although provided with, the wire feeder 20 is separated from the carriage 30 is characterized in that the movement to significantly reduce the weight. As a result, it is possible to achieve excellent welding efficiency, workability, weldability, and welding speed even in shipbuilding and bridge fabrication in shipbuilding, which has been difficult to apply in the past, thereby greatly improving productivity and promoting welding automation. do.

Description

Submerged Arc Welding System {Submerged Arc Welding System}

1 is a schematic view showing a submerged arc welding apparatus according to the present invention.

2 is a perspective view of the wire feeding device used in the present invention.

3 is a side view of a carriage used in the present invention.

Figure 4 is a detailed view showing the angle and position adjusting means of the dual torch.

Figure 5a is a bottom view showing a state in which the fixing device shown in Figure 3 is fixed to the guide rail without a guide rail.

Figure 5b is a bottom view showing a state in which the fixing device is removed from the guide rail.

The present invention relates to a lightweight Submerged Arc Welding (SAW) apparatus that can expect excellent weldability and improved weld quality.

SAW is an automatic welding method that is supplied earlier through a supply pipe in a hopper to protect the arc from the atmosphere, and feeds a solid wire into the flux to generate and weld an arc between the electrode and the base material in the flux. These SAWs can be welded with high efficiency with large penetration because the melt is protected by flux, is isolated from the atmosphere, and the heat loss of arc heat is small, and it is clean and uniform even though it is mainly used for welding thick material. Beads have the advantage of being formed.

The apparatus for SAW includes a power supply unit, a wire feeding device, a welding torch or a welding gun, a cable connecting them, a hopper for flux and a recovery system, a transfer mechanism applied during automatic welding, and the like.

However, such a SAW device has an excellent welding efficiency, workability, weldability, welding speed, while being inherently limited in use due to its large volume and overweight. For this reason, the SAW system is mainly installed in a building, and it is difficult to apply it in the fields such as shipbuilding and bridge manufacturing, especially in shipbuilding, where the proportion of welding is high. If they were moved to the required site and even this was not applicable, instead they were manually performing other welding, such as CO ₂ Flux Cored Arc Welding (FCAW).

Accordingly, the present invention has been made to solve the above problems, and by reducing the weight of the SAW device to move the device, excellent welding efficiency, workability, even in the field of shipbuilding and bridge construction of shipbuilding, which was difficult to apply conventionally The purpose is to significantly improve productivity by achieving weldability and welding speed, and to promote welding automation.

Another object of the present invention, by using the SAW as described above to improve the working conditions by intense emission, heat generation, noise reduction to create an environment-friendly working environment.

It is still another object of the present invention to provide a SAW device that can easily adjust the depth of penetration and the width of beads without adjusting current or voltage.

Hereinafter, a SAW device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a SAW apparatus according to the present invention, as shown in the drawing, the SAW apparatus of the present invention includes a power supply unit 10; and a wire feeding apparatus 20; A carriage 30 equipped with a torch 3 and a flux hopper 32, an angle and position adjusting means of the torch, a control box, and the like; And a guide rail 40 (see FIG. 3). In the SAW apparatus according to the prior art, the wire feeding device made of a wire spool is mounted on the carriage, so that the weight of the carriage becomes heavy. In the present invention, the wire feeding device 20 is separated from the carriage 30 and the wire 2 is separated. It is configured to use to realize the weight reduction, and there is a characteristic that can be moved (for example, moving the carriage 30 along the guide rail 40).

First, in the SAW apparatus according to the present invention, one DC power source is used as the power supply unit 10 to distribute the current evenly to the dual torch 3 described later. Reference numeral 11 is a cable for supplying current from the power supply unit 10.

The wire supply device 20 supplies two narrow wires 2 from two wire spools 23 which are inclined, via a wire guide portion made of a bracket 22 having a plurality of rollers 21. As shown, the two wire spools 23 are arranged side by side, but are not completely parallel and are inclined at an angle, which describes each wire 2 to be supplied from each wire spool 23 below. It can be easily supplied between the feeding roller and the pressing roller of the wire feeding device 20 to be. In FIG. 2, the wire supply apparatus 20 used for this invention is shown in detail, omitting the wire spool 23. As shown in FIG.

The wire feeding device 20 is mounted on a member installed upright on the bottom, and a drive motor 25 in which a reducer (not shown) is built-in, and a feeder fitted to an output rotating shaft extending from the drive motor 25. The roller 21, the pressurizing roller 21 which is installed in each of the two brackets 22 rotatably mounted via the hinge shaft and engaged with the feeding roller 21, and each of the brackets 22 It is provided with two fastening handles 26 which detachably fix one side to a member installed upright. This wire feeding device 20 is described in more detail in the applicant's Korean Utility Model Registration Application No. 2002-38682, which is incorporated by reference in its part.

On the other hand, since the diameter of the wire 2 has a high welding current density per cross-sectional area of the wire to improve welding workability and bead shape, the diameter of the wire 2 is preferably in the range of 1.2 mm to 2.0 mm. The size and weight of the spool 23 can be significantly reduced.

Figure 3 is a side view of the carriage used in the present invention, Figure 4 is a detailed view showing the angle and position adjusting means of the dual torch.

The carriage 30 of the SAW apparatus according to the present invention includes a support main body 31, a flux hopper 32 installed on the support main body 31, and the hopper 32 to a double torch 3. A connected hose 33, a welding head 34 formed by two torches 3 inclined to each other, and a control box 35 installed on the support body 31 to control the welding process are provided.

The support body 31 supports the hopper 32, the welding head 34 having the double torch 3, the control box 35, and the like. The longer the length of the support body 31 is, the more flux is supplied. Is advantageous. If possible, the height of the hopper 32 is adjusted and fixed so that the bending of the hose 33 occurs less.

The hose 33 for supplying the flux from the hopper 32 is flexible and elastic, but as described above, it is preferable that the hose 33 has a straightness without being folded, so that the movement of the flux is made of a smooth material.

The welding head 34, together with the double torch 3, is screwed 36a screwed into a predetermined arc-shaped hole (not shown) of the fixing bracket 36 so that the proper angle and spacing of the double torch 3 can be set. Head body 34b formed to concentrate the tip of the double torch 3 by having two torch support units 34a mounted via a) and a screw 36b for adjusting the height of the fixing bracket 36. Equipped with. Here, the fixing bracket 36 and the screws 36a, 36b, etc. constitute the angle and position adjusting means of the dual torch. Therefore, narrowing the angle or spacing between the two torches 3 increases the depth of penetration, while conversely, increasing the width of the beads increases the angle between the torch 3 without adjusting current or voltage. There is an advantage to control the depth of penetration and the width of the beads.

The control box 35 checks the current and voltage used at the time of welding and the welding speed in real time, thereby achieving easy setting of welding conditions and improving work efficiency and weldability. And a voltage setting dial, an actual current and voltage display screen during welding, a traveling speed display screen, a traveling speed setting dial, a direction control switch, a start and stop button, and the like.

In addition, the carriage 30 is provided with an adjusting frame 37 for moving the welding head 34 in the lateral direction (the longitudinal direction of the rail or the perpendicular direction of the welding direction), and also of the welding head 34. Longitudinal direction (direction in the longitudinal direction of the rail or parallel to the welding direction) Angle adjusting lever 38a, Transverse angle adjusting lever 38b of the welding head 34, Height adjusting lever of the hopper 32 (not shown) It may be provided with a control means such as. The control levers (38a, 38b) is preferably made of a dial-type adjustment means using a bevel gear, without being limited to this, any adjustment means may be used.

Moreover, the base part of this carriage 30 is equipped with the fixing device 39 provided with the roller 41c and 41d arranged mutually so that the separation distance can be adjusted, The carriage 30 uses this fixing device 39 as a means. ) And guide rail (40) to help with removal. 5A and 5B, the fixing device 39 is adapted to closely contact or separate the handle 39a and one roller 41c with respect to the guide rail 40 according to the operation of the handle 39a. Consisting of an operating part 39b. As is known to those skilled in the art, the handle 39a is a component that performs reciprocating movement of the movable side roller support 39c, and instead reciprocates the movable side roller support in the description and claims of the present invention. Note that it is possible to substitute by various means that can be made. This operating part 39b can slide through the movable side roller support part 39c, the fixed side roller support part 39d fixed to the base part of the carriage 30, and the fixed side roller support part 39d, and has one end At least one rod 39e connected to the side of the movable side roller support 39c and between the flanged end of the rod 39e and the fixed side roller support 39d therein to accommodate the rod 39e therein. It is provided with a spring 39f. As shown in these figures, when the worker raises the handle 39a (see Fig. 5B), the movable side roller support portion 39c moves in a direction away from the fixed side roller support portion 39d, thereby moving the movable side roller. The rollers 41c disposed on the support 39c are separated from the rollers 41d disposed on the fixed-side roller support 39d, and are separated from each other. , 41d is separated from the guide rail 40, so that the carriage 30 can be easily removed from the guide rail 40. At this time, while the rod 39e connected to the movable side roller support part 39c moves along the moving direction of the movable side roller support part 39c, the end with the flange of the rod 39e slides toward the fixed side roller support part 39d. The spring 39f is compressed while moving. On the other hand, lowering the handle (39a) is to operate the operating portion (39b) of the fixing device 39 as described above, while the roller 41 is in contact with the guide rail (40) securely. Specifically, while the movable side roller support portion 39c moves toward the fixed side roller support portion 39d, the roller 41c disposed on the movable side roller support portion 39c is disposed on the fixed side roller support portion 40. Moving toward 41d, that is, the roller 41c is in close contact with the guide rail 40 arranged between the rollers 41c and 41d so that the carriage 30 can be firmly mounted onto the guide rail 40. do. The guide rail 40 guides the rollers 41c and 41d of the carriage 30, and the rollers rotate to drive the carriage 30.

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The installation and use method of the SAW apparatus according to the present invention configured as described above will be described.

A guide rail 40 is provided on the welding target in parallel with the V groove or the welding line, and a carriage 30 mounted with the welding head 34 and the control box 35 is mounted on the guide rail 40. do. After the carriage 30, the power supply unit 10, and the wire feeder 20 are connected, the longitudinal or transverse angle of the welding head 34 and the angle and spacing of the double torch 3 are adjusted. Next, welding is started, supplying flux from the hopper 32.

In the SAW apparatus according to the present invention, the working distance of the carriage 30 and the wire feeding device 20 is determined according to the length of the cable 11 connected between the power supply unit 10, and is limited within the actual tens of M ranges. In the field, the size of the unit block is sufficient within the range.

When the SAW apparatus according to the present invention is actually used, the conventional welding is about 10 pass using FCAW when welding a 30 mm thick V-improved plate, but the present invention can be shortened to 6 pass. The weld properties and the appearance of beads are much better than FCAW. In the case of welding a V-improved flat plate having a thickness of 55 mm, the FCAW is 31 pass, but in the present invention, the FCAW is reduced to about half by 15 pass. Therefore, it can be seen that using the SAW apparatus according to the present invention can bring great productivity in terms of the number of passes and the welding speed.

As described above, according to the present invention, since the SAW device is lighter and can be moved, it is possible to achieve excellent welding efficiency, workability, weldability and welding speed even in shipbuilding and bridge manufacturing, which have been difficult to apply in the past. In this way, the productivity can be greatly improved, and the welding automation can be achieved.

In addition, by using the SAW in the shipbuilding shipbuilding or bridge manufacturing field as described above, it is possible to create an environment-friendly working environment by improving the working conditions by intense emission, heat generation, noise reduction.

In particular, there is an advantage that the depth of penetration and the width of the beads can be adjusted only by adjusting the angle between the dual torches without adjusting the current or the voltage, so that the workability to work efficiency can be greatly improved.

Claims (6)

A power supply unit 10; and a wire feeding device 20; A carriage 30 equipped with a torch 3 and a flux hopper 32; In the submerged arc welding apparatus provided with; The wire feeding device 20 is separated from the carriage 30, the base of the carriage 30 is provided with a fixing device 39 having a pair of rollers (41c, 41d) for adjusting the separation distance, The fixing device 39 is composed of a handle 39a and an operating portion 39b configured to closely contact or separate the rollers 41c and 41d according to the operation of the handle 39a. This operating part 39b includes: a movable side roller support part 39c provided with the roller 41c; A fixed side roller support (39d) having the roller (41c) and fixed below the base of the carriage (30); One or more rods 39e, one end of which is connected to the side of the movable side roller support portion 39c and the other end of which extends through the stationary side roller support portion 39d and ends with a flanged end; And And a spring 39f which receives the rod 39e therein and is positioned between the end of the rod 39e and the fixed side roller support 39d, so that the carriage 30 is driven by rotation of the roller. Submerged arc welding device, characterized in that the moveable along the guide rail (49). 2. The submerged arc welding device according to claim 1, wherein the torch (3) is doubled to form a welding head (34). 3. The welding head (34) according to claim 2, characterized in that the welding head (34) is provided with two torch rests (34a) mounted via a screw (36a) so as to set the angle and spacing of the dual torch (3). Submerged Arc Welding Device. According to claim 1, wherein the carriage 30 is provided with an adjustment frame 37 for the transverse direction (orthogonal to the welding direction) of the welding head 34, and the longitudinal direction of the welding head 34 Directional (welding direction) angle adjustment lever 38a, and the adjusting means such as the lateral angle adjustment lever 38b of the welding head 34, the adjustment levers (38a, 38b) is a dial type using a bevel gear Submerged arc welding apparatus, characterized in that the adjusting means. delete The method of claim 1, wherein the power supply unit 10 is made of one DC power source, The wire feeding device 20 is arranged through two wire guides formed of brackets 22 having a plurality of rollers 21, arranged side by side, and are not completely parallel but are inclined at a predetermined angle. Submerged arc welding apparatus, characterized in that for supplying two wires (2) from.

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