KR100415489B1 - Submerged Arc Welding Equipment for Horizontal Butt Joint Welding of Thick Plate - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thick plate transverse posture submerged welder, the object of which is to prevent the occurrence of welding defects due to exposure of the arc during air welding during thick plate welding with a weld groove depth of 30 mm or more. The flux consumption can be reduced by keeping the flux support belt in close contact with the surface of the welded object and at the same time, it can reduce the flux consumption and improve the weld productivity by recovering the flux spread inside and outside the weld groove. To provide a thick plate transverse posture submerged welder.

The present invention provides a pipe rail installed along a welding line on a surface of a welded object, a traveling carriage for moving a welding device along the pipe rail, a welding torch moving by the traveling carriage and welding a welded object, and the welding torch. Thick plate transverse direction consisting of a wire feeding device for supplying a welding wire to the welding device, a flux spreading device and a flux recovery device installed at the front and rear of the welding torch, and a flux support belt installed at the traveling carriage to support the welding flux below the welding line. In the posture submerged welding machine, the flux spreading device is a flux forced feeding device for press-spraying the welding flux to the inside of the welding groove, and a flux installed between the flux forced feeding device and the welding torch to spread the flux outside the welding groove. It is composed of a spray nozzle, and the flux support belt has a welding running speed and Is installed on the lower end of the electric motor and the heat-resistant rubber belt for rotating the heat-resistant rubber belt with a working speed consisted of having a template which is in close contact with the surface of the weld by the reaction force of the spring.

Description

Submerged Arc Welding Equipment for Horizontal Butt Joint Welding of Thick Plate}

The present invention relates to a thick plate transverse posture submerged welder, and more particularly, when a welding groove depth of the welded object is deeper than 30 mm, welding is performed by pushing a sufficient amount of flux into the welding groove by using a flux forced feeding device. The heavy arc is prevented from being exposed to the air, and the belt is spring-tightly adhered to the surface of the welded object adjacent to the area under the weld groove to support the welding flux from flowing down, and the welding flux moves relatively to the surface of the welded object during welding. The belt is rotated by the electric motor at the same speed as the traveling carriage traveling speed, and a template having the same end shape as the shape of the surface to be welded is installed on the body of the belt device to prevent the welding flux from flowing down during the welding operation and at the same time the welding torch Welding flux sprayed inside and outside the welding groove from behind At the same time plate sidewise to recover positions relate to Submerged welder.

Conventionally used submerged arc welding machines perform welding work in a downward position, so that the welded portion of the welded object is placed horizontally below the wire, and the wire is fed thereon to generate an arc between the wire and the welded object. By spraying the welding flux sufficiently, the arc generating part could be isolated from the air to make a healthy weld free of welding defects.

However, in the case of welding a thick steel plate with a welding groove depth of 30 mm or more by using a transverse posture submerged arc welding machine, even if the welding flux is sprayed on the welding groove, the flux does not flow to the depth of the welding groove, and therefore, When it is generated, there is a problem that the arc generating part is exposed to air, which is easy to cause welding defects. Also, in order to spray the welding flux around the welding groove, a flux support belt is disposed just below the welding groove, but the rubber belt and the welded object There is a problem in that the welding flux flows down into the gap due to the incomplete adhesion state, and when the rotation speed and the traveling carriage traveling speed of the flux support belt are different, the molten metal and the molten slag are moved by the welding flux and welded. There is a problem that the appearance of the bead becomes poor.

In addition, there is a problem that each nozzle should be installed to recover the welding flux inside the welding groove and the outside of the welding groove after completion of welding.

The present invention has been made in view of the above problems, and an object thereof is to prevent welding defects due to exposure of arc during air exposure during welding of a thick plate having a welding groove depth of 30 mm or more to be welded. Flux consumption can be reduced by keeping the flux of flux from the welded material and always keeping the flux bearing belt on the surface of the welded object, and improving the productivity of welding by recovering the flux spread inside and outside the weld groove. To provide a thick plate transverse posture submerged welder.

The present invention for achieving the above object is a pipe rail which is installed along the welding line on the surface of the welded object, a traveling carriage for moving the welding device along the pipe rail, and the welding to move the welded object by the traveling carriage A welding torch, a wire feeding device for supplying a welding wire to the welding torch, a flux spreading device and a flux collecting device installed in front of and behind the welding torch, and a traveling carriage installed to support the welding flux at a portion below the welding line. In the thick plate transverse posture submerged welding machine composed of a flux support belt, the flux spreading device is a flux forced feeding device for press-spraying the welding flux to the inside of the welding groove, and is installed between the flux forced feeding device and the welding torch to weld the groove. It consists of a flux spreading nozzle for spraying the flux to the outside, the flux Needle belt is in close contact with the surface of the electric motor and the target weldment for rotating the heat-resistant rubber belt at the same speed as the running speed welding consisted of having a template to prevent down flow of the welding flux.

1 is a front view of a welder according to the present invention;

Figure 2 is a welder side view according to the present invention

Figure 3 is a configuration diagram of the support of the flux support belt of the present invention

4 is a configuration of the flux bearing belt of the present invention

5 is a detailed view of portion 'A' of FIG.

6 is a configuration of the flux forced supply device of the present invention

7 is an exemplary view of a flux recovery nozzle of the present invention.

8 is a layout view of the welding torch peripheral device of the present invention;

<Description of the symbols for the main parts of the drawings>

(1) pipe rails (2) traveling carriage

(3) Wire Reel (4) Wire Feeder

(5) welding torch (6) electric slide

(7) Flux recovery / spreading device (8) Flux forced feeding device

(9) flux spraying nozzle (10) flux support belt

(11) Control Box (12) Flux Hopper

(21) First Support (22) Second Support

(23) hinge (24) arm

(25) spring shaft (26) spring

(27) Spring pressurized handle (28) Up and down slot

(29) Front and rear long holes (41) Feeding motor

(81) Electric motors (82) Screws

(83) Cylindrical Casing (84) Spray Nozzles

(85) Inlet Nozzles (91) Flux Recovery Nozzles

(92) opening 101 body

(103) bearings and bearing bearings (103) shaft

(104) Pulleys (105) Heat Resistant Rubber Belts

(106) Template (107) Electric Motor

108 slide guide ring 111

(113) Guide Bar (114) Spring

1 is a front view of the welder according to the present invention, FIG. 2 is a side view of the welder according to the present invention, FIG. 3 is a configuration diagram of the support of the flux support belt of the present invention, FIG. 4 is a configuration of the flux support belt of the present invention, FIG. 5 is a detailed view of portion 'A' of FIG. 4, FIG. 6 is a configuration diagram of a flux forced feeding device of the present invention, FIG. 7 is an exemplary view of a flux recovery nozzle of the present invention, and FIG. 8 is a view of the welding torch of the present invention. The peripheral device layout is illustrated, and the present invention provides a pipe rail (1) installed along the welding line on the surface of the welded object, a traveling carriage (2) for moving the welding device along the pipe rail (1), and the traveling A welding torch 5 moving by the carriage 2 to weld the welded object, a wire feeding device 4 for supplying a welding wire to the welding torch 5, and the front and rear of the welding torch 5; Installed flux spreading device and flux recovery device, In a thick plate transverse posture submerged welder composed of a flux support belt (10) installed in a traveling carriage (2) to support a welding flux at a site, the flux spreading device is a flux force for press-spreading the welding flux to the inside of the welding groove. And a flux spreading nozzle 9 installed between the supply device 8 and the flux forced supply device 8 and the welding torch 5 to spray flux on the outside of the welding groove, wherein the flux support belt 10 is provided. Is installed at the lower end of the electric motor 107 and the heat-resistant rubber belt 105 for rotating the heat-resistant rubber belt 105 at the same speed as the welding running speed is in close contact with the surface of the welded object by the reaction force of the spring (114). It was configured with the template 106 to be.

The flux spreading device 8 has two flux spreaders disposed at the front of the welding torch 5 in the running direction, and the flux spreading device 8 is provided with a flux forced feeding device 8, a cylindrical casing 83, It consists of an electric motor 81 installed in the cylindrical casing 83, and a screw 82 that rotates by the electric motor 81, the cylindrical casing 83 and the flux hopper 12 for storing the flux and An inlet nozzle 85 is formed to be connected by a hose, and an elliptical spray nozzle 84 is installed at an end to be configured to guide the flux supplied from the flux hopper deeply into the welding groove.

The flux spraying port provided between the flux forced feeding device 8 and the welding torch 5 freely drops the welding flux recovered from the flux recovering device as the flux spreading nozzle 9 so that the flux is supplied by the flux forced feeding device 8. It was configured to further spread a sufficient amount of flux over the filled weld groove.

The flux recovery apparatus recovers the flux by generating a vacuum force using compressed air. The flux recovery nozzle 91 has an end 92 having an opening 92 having a shape similar to the shape of the lower edge of the weld groove. Flux bearing belt 10 as well as the flux sprayed on the inside and outside of the welding groove was configured to recover at the same time.

The flux support belt 10 is installed on the traveling carriage 2 by the first and second support members 21 and 22 and the arm 24, and the first support 21 is vertically long hole 28 on one side. And a long hole in the front and rear direction 29 is formed on the other side, and the long hole 28 is connected to the traveling carriage 2 to adjust the vertical distance between the welding groove and the flux support belt 10, and the front and rear direction The long hole 29 is connected to the second support 22 to adjust the horizontal distance between the surface of the welded object and the flux support belt 10, and when the traveling carriage 2 moves along the weld line, the welded and flux support belts ( 10) to accommodate variations in the horizontal distance between them.

The arm 24 is connected to the hinge portion 23 formed on one side of the second support 22 and the other side is connected to the body 101 of the flux support belt, the second support 22 and the arm 24 The spring shaft 25 is installed to penetrate the spring 24 to install the spring 26 on the spring shaft 25 protruding to the rear of the arm 24, and the spring pressing handle 27 is installed on the spring shaft 25 to pressurize the spring. As the handle 27 is tightened, the flux support belt 10 is configured to be in close contact with the object to be welded.

At both ends of the body 101 of the flux support belt, a rotating device for a heat-resistant rubber belt 105 composed of a bearing and bearing bearing 102, a shaft 103, and a pulley 104 is installed, and an electric motor is provided on one side of the rotating device. 107 is installed to adjust the rotational speed of the belt, the outer surface of the pulley 104 and the assembly of the heat-resistant rubber belt 105 has a structure that is interlocked with the symmetrical symmetry so as not to slip during the rotation operation. The end of the heat-resistant rubber belt 105 on the side in contact with the object to be welded protrudes about 10 mm from the belt rotator to improve adhesion with the object to be welded, and at the end of the pulley 104 opposite the outer diameter of the pulley 104. A large diameter guide ring 108 was provided to prevent the belt 105 from being pushed out of the pulley 104 during the rotation operation of the belt 105.

In addition, a long hole is formed in the body 101 of the flux support belt 10 in a direction perpendicular to the object to be welded, and the spring 114, the guide bar 113, and the slide 111 are assembled to the long hole, and the slide A template 106 having a shape corresponding to the surface shape of the welded piece is installed at the upper end of the 111 to be in close contact with the surface of the welded piece to prevent the flux from flowing during the welding operation. It is installed in the long hole through the slide 111 and the spring 114, the template 106 is installed on the top of the slide to be located below the rotating upper heat-resistant rubber belt 105, the reaction force of the spring 114 By contact with the surface of the workpiece.

When welding using the present invention configured as described above, by adjusting the installation height of the first support (21) installed on the front, rear of the traveling carriage 2, the upper surface of the flux support belt (10) than the lower edge of the welding groove It is positioned below about 10mm, and aligned in parallel with the welding line, and tighten the spring pressure handle 27 so that the welded object and the flux support belt 10 are in close contact.

Adjust the bracket of the wire feeder (4) to adjust the welding torch (5) angle according to the working standard, position the wire and weld line tracker in the proper position, and the spray nozzle (84) of the flux feeder (8) After filling the flux inside the welding groove by arranging it to the depth of the welding groove, the valve of the flux spreading nozzle 9 is opened to spread enough flux around the weld.

Set welding current, voltage, etc. of the control box 11, set the equipment control mode to automatic mode, press the welding start button to start welding, the welding wire is supplied, an arc is generated, the traveling carriage 2 and the flux support The belt 10 starts at the welding speed, and the flux recovery / spreading device 7 is operated so that the flux of the rear portion of the weld is transferred through the opening 92 of the flux recovery nozzle 91 to the flux support belt 10 and the welding groove. It will inhale the flux.

As described above, when the welding starts and reaches the end position of welding, the arc is extinguished by pressing the welding stop button, and the operation of all the devices is stopped, and the welding ends.

When the welding is finished, the welding mode switching switch of the control box 11 is switched to the manual mode, and when the flux recovery / spraying device 7 and the traveling carriage 2 are turned on, the traveling carriage 2 and the flux support belt 10 are turned on. At the same time, while driving at the welding speed to recover both the flux support belt 10 and the remaining flux of the welding groove, and when the recovery operation is finished, the power of each device is turned off and the welding operation is terminated. It is a reel, 6 is an electric slide, and 41 is a feeding motor.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention improves the welding quality by protecting the welding arc by sufficiently spraying the welding flux to the deep welding groove during the transverse posture submerged welding of the thick plate, and by using the electric motor so that the welding flux does not move from the welded object during welding. A template having a shape corresponding to the shape of the rotating belt and the surface of the object to be welded is installed on the belt body so that the welding flux is always in close contact with the surface of the object to be welded to prevent the flow of the welding flux during welding, thereby reducing the flux consumption. By preventing the occurrence of defects there are many effects, such as to improve the quality of the welded object. In addition, the welding productivity can be improved by using a flux recovery nozzle having a shape similar to that of the welding groove that can simultaneously recover the welding flux sprayed on the inside and the outside of the welding groove after the welding torch.

Claims (4)

A pipe rail 1 provided along the welding line on the surface of the object to be welded, a traveling carriage 2 for moving the welding device along the pipe rail 1, and the traveling carriage 2 are moved by the traveling carriage 2. A welding torch 5 for welding, a wire feeding device 4 for supplying a welding wire to the welding torch 5, a flux spreading device and a flux recovery device provided in front of and behind the welding torch 5; A thick plate transverse posture submerged welder composed of a flux support belt (10) installed in a traveling carriage (2) for supporting a welding flux below a weld line; The flux spreading device is installed between the flux forced supply device 8 for press-spraying the welding flux to the inside of the welding groove, and installed between the flux forced supply device 8 and the welding torch 5 to spray flux outside the welding groove. Consisting of flux spreading nozzles 9, The flux bearing belt 10 is installed at the lower end of the electric motor 107 and the heat resistant rubber belt 105 to rotate the heat resistant rubber belt 105 at the same speed as the welding running speed, and corresponds to the surface shape of the welded object. And having a template 106 in close contact with the surface of the welded object, The flux recovery device includes a flux recovery nozzle 91 having an opening 92 having a shape resembling a weld groove lower edge portion improved shape to simultaneously recover the flux support belt 10 and the flux inside and outside the welding groove. A thick plate transverse posture submerged arc welding machine, characterized in that it is configured to be. The method of claim 1; The flux forced feeding device 8 includes a cylindrical casing 83 having an inlet nozzle 85, an electric motor 81 installed in the cylindrical casing 83, and a screw rotating by the electric motor 81. 82, and an elliptical sprinkling nozzle 84 provided at the end of the cylindrical casing 83, forcibly feeding the flux supplied through the inlet nozzle 85 by the rotation of the screw 82. Thick plate transverse posture submerged arc welder. The method of claim 1; The flux support belt 10 is installed in the traveling carriage 2 through the first support 21, the second support 22 and the arm 24, The first support 21 is formed in the upper and lower long holes 28 on the upper side and connected to the traveling carriage 2, the other side is formed with a front and rear long holes 29, the second having a hinge 23 Is connected to the support 22, the one side of the arm 24 to the hinge portion 23, and the other side is connected to the body 101 of the flux support belt, A spring shaft 25 is installed to penetrate the arm 24 and the second support 22, and a spring 26 and a spring pressurizing handle 27 are installed on the spring shaft 25 so that the spring 26 A thick plate transverse posture submerged welder, characterized in that the flux bearing belt 10 is brought into close contact with the workpiece by reaction force. The method of claim 1; The flux bearing belt includes a rotating device composed of a bearing 102 and bearing bearings, a shaft 103, and a pulley 104 installed at both ends of the body 101, and an electric motor 107 installed at one side of the rotating device. And, it is composed of a heat-resistant rubber belt that is unevenly coupled to the pulley 104, The heat-resistant rubber belt 105 is installed to protrude 10mm toward the welded object, and the guide ring 108 is installed on the opposite pulley 104 larger than the outer diameter of the pulley 104, A long hole is formed in the body 101 in a direction perpendicular to the object to be welded, a guide bar 113 penetrating the slide 111, the slide 111, and the spring 114 is installed in the long hole, and the slide ( 111. A thick plate transverse posture submerged welder, comprising: a template 106 provided on an upper end thereof to improve contact with a welded object.