WO2015160122A1 - Horizontal butt joint high deposition rate welding apparatus and method - Google Patents

Abstract

The present invention provides a horizontal butt joint high deposition rate welding apparatus and method, which form a high deposition rate welded portion while generating a root part when performing high deposition rate welding for a weld bevel side so as to enable high deposition rate welding having no defects on the inside and surface of a welded section, in the automatic welding of horizontal butt joint, thereby reducing the number of welding passes. Furthermore, the present invention provides the horizontal butt joint high deposition rate welding apparatus and method, wherein the apparatus is provided in a moving mechanism unit so as to be located in a welding direction by a welding tip, thereby moving in the forward welding progress direction and preventing molten metal from flowing, and facilitates equipment handling, reduces the weight of equipment and fully forms surface beads by filling the molten metal through the lower part.

Description

Horizontal Butt Joint Welding Device and Method

TECHNICAL FIELD The present invention relates to welding of horizontal butt joints, and to a horizontal butt joint welding device and a method for performing welding of a joint by large welding including a welding of a root part.

In general, the butt joint is a welding that joins and joins opposite welding base metals, and is often used when joining an iron plate.

1 is a view showing a welding state after the root pass in the conventional automatic welding.

In FIG. 1, the S side view shows a cross-sectional view and the P side view shows a partial cross-sectional perspective view. In the following specification and drawings of the present invention, S denotes a partial cross-sectional perspective view showing a cross-sectional view.

As shown in FIG. 1, in the butt welding, when two butt welding members 1 (1a and 1b) are horizontally butt welded horizontally, the upper and lower welding base materials 1a and 1b face each other. , The weld joint becomes a bevel shape. Then, the improved surface of the upper welding base material 1a is formed to be inclined upward, and the welding is performed in a state in which the lower welding base material 1b is improved at right angles in the plane.

When the flux cored arc welding method using automatic equipment is applied to such a horizontal butt joint, as shown in FIG. 1, the upper welding base material 1a and the lower welding base material 1b have different gaps according to the manufacturing degree. The root portion 2 is formed by filling the gap and performing root pass welding (superlayer welding) on the back side of the surface on which the welding is performed. In the case of performing the welding welding on the inside of the refinement in which the root part 2 is formed, the molten water is preceded by the welding arc due to the influence of the viscosity of the low molten water and the gravity acting on the molten water. It will form on top. The arc formed on the molten metal is difficult to infiltrate the base material sufficiently, and defects such as poor fusion and slag incorporation frequently occur in the weld metal.

In addition, when the arc force is low, the upper welding base material, which is the upper main material, forms a macro section 53 (see FIG. 1) that is not welded.

The arc force is the force that pushes the melt, and generally increases in proportion to the product of the square of the current and the voltage. When the arc force is weak, that is, when a low current and a low voltage are used, the arc radius 51 becomes small and the molten metal 52 is also produced small. In addition, the force of pushing the small melt 52 is also small, forming a thin penetration in the bottom surface of the base material, the molten water does not push up to the improved surface of the upper welding base material (1a), so that the lower welding base material ( The welding is formed only in 1b), and the upper welding base material 1a forms a non-welded macro section 53 and is welded.

In addition, the end portion 31 of the general welding tip 30 has an outer diameter of about 8 mm and is very thick, so that when a short rod is carried out in a narrow narrow space, the end portion 31 of the welding tip 30 comes into contact with an improved surface, and thus a short is formed. It happens frequently. 2 shows such a prior art welding tip 30. Therefore, in order to weld the interior of the improvement, welding is carried out as finely as possible with 5 to 7 passes. In addition, when performing the welding of the surface portion after completion of the improved internal welding, the welding bead sag occurs frequently due to the influence of the low molten metal viscosity and the gravity acting on the molten metal. If possible, the welding is divided in detail.

3 is a cross-sectional view of welded portions # 1 to # 6 welded with a plurality of passes of a welding base material having a thickness of 23 mm with a conventional welding device. In the conventional welding method, 8 passes are required for a 15 mm thick base material, and 10 to 15 passes are required for a 23 mm thick base material. For this reason, when welding a base material having a thickness of 23 mm with a prior art welding device, the macro section 53 having a surface where the upper welding base material is not welded (areas of Arabic numerals, 1, 3, 5, 8, and 9 in the welding cross section) Is generated, and a large number of passes must be welded.

That is, in the case of the prior art, the root portion 2 is formed by performing root pass welding (superlayer welding) for the gap determined by the thickness of the welding base material, and after the root portion 2 is formed, the improved surface. The welding is performed to the inside, and even when the welding is performed according to the thickness of the base material, as shown in the cross section of the welding part of # 1 to # 6, a large number of multi-layer passes (10 ~ 15 pass) There is a limit to the productivity improvement by reducing the number of passes because there is no choice but to perform welding.

In order to solve such a conventional problem, in the present invention, in the automatic welding of the horizontal butt joint, a large portion of the welded portion is formed while the root portion is generated when performing the weld welding on the improved surface. The present invention provides a horizontal butt joint welding device and a method for enabling welding without defects on a surface, thereby reducing the number of welding passes.

In addition, the present invention is mounted on the traveling mechanism to be located in the welding direction by the welding tip to move in the forward direction of the welding, to prevent the molten metal flowing down, easy to handle the equipment and reduce the weight, Provided is a horizontal butt joint welding apparatus and method that can be completed by filling the surface beads.

The horizontal butt joint welding device according to the present invention includes a traveling mechanism for weaving a welding tip for improvement of an upper welding base material and a lower welding base material, a welding torch equipped with the welding tip, and a welding torch mounted on the traveling device, and the welding. And a control unit for controlling welding conditions for each unsealing position of the welding torch in consideration of a horizontal cast joint mounted on the driving mechanism to be positioned in the welding direction by a tip, and a horizontal welding joint improving shape; The control unit transfers the driving mechanism to weaving along a plurality of nodes, the welding current, the welding voltage, the wire supply speed, the traveling speed, the stopping time at the nodes, the weaving speed, the weaving in the moving section between the nodes and the nodes. It is configured to control at least one of the widths to perform the welding welding on the improved surface.

In the above, the copper alloy is provided with a forward gas injector for injecting gas in the welding advancing direction, so as to prevent the surface of the molten metal from flowing down.

In the above, an initial value is set according to the gap G between the upper welding base material and the lower welding base material and the thickness of the welding base material, and the welding current, the welding voltage, At least one of the wire feed speed, travel speed, stop time at the node, weaving speed, and weaving width is controlled in real time.

In the above, the stop time at the node is the node, back bead B and the surface of the back bead B which performs welding to the inside of the improved surface when the total stop time for the generation of the defect free beads is T1. The stop time of each of the nodes between the beads F has a stop time of 0.2 * T1 in the error range of ± 10%, and the stop time of the node in the surface bead F side is 0.8 * in the error range of ± 10%. It has a stop time of T1.

In the above, the wire supply speed, the initial value at the node for setting the rear bead (B) is set by the gap (G), located between the node for forming the rear bead (B) and the surface bead (F) The nodes are calculated to increase from the initial value in proportion to the vertical width of the cross section of the improvement surface.

In the above description, the control unit is configured to maintain the welding amount per unit volume by using at least one of the current value and the voltage value of the current detection sensor or the voltage detection sensor. At least one of the stopping time, the weaving speed, and the weaving width is controlled.

In the above, one surface of the copper injecting the forward gas is formed in a streamlined recessed recess groove, the recess groove is asymmetrical in the vertical direction and the receiving groove is further formed to fill the bottom of the recess groove do.

In the above, the copper plating is formed in a plate shape that is in close contact with the surface of the base material, the recess groove is formed in the groove in contact with the surface of the base material to cover the improved surface of the base material in the vertical direction, the recess groove is the driving mechanism portion It is formed extending in the conveying direction, the receiving groove formed in the lower portion of the concave groove is formed in the concave concave shape in the concave groove to accommodate the water.

 In the above, the copper x-axis slide assembly coupled to the running shaft of the drive mechanism; A z-axis slide assembly connected to the copper immersion x-axis slide assembly and slid in a vertical direction, the copper immersion being connected to the copper immersion z-axis slide assembly, the conveying direction of the traveling mechanism part, a vertical direction of the base material, It moves in close contact with the base material.

The horizontal butt joint welding method according to the present invention is provided with a traveling mechanism for repeatedly weaving the weld tip in a specific direction with respect to the improvement of the upper welding base material and the lower welding base material, and is equipped with the welding tip is mounted to the traveling mechanism part And a control unit for controlling welding conditions for each unsealing position of the welding torch in consideration of a welding torch, a copper tote mounted on the driving mechanism to be positioned in the welding direction by the welding tip, and a horizontal welding joint improving shape. The immersion is configured to move in the welding proceeding direction and to prevent surface run-off of the molten metal; A welding current calculation process or a welding voltage calculation process in which the control unit calculates a welding current or a welding voltage in a moving section between the nodes; A stop time calculation process or a travel speed calculation process, wherein the control unit calculates a stop time or a travel speed at each node; The control unit controls the welder and the traveling mechanism according to the welding current for each node and the movement interval between the nodes calculated during the welding current voltage calculation process, the stopping time or the traveling speed for each node calculated in the calculation process of the welding current and the stop time. This includes a welding process for welding the welding to the improved surface without performing a root pass welding.

In the above, the welding current and the welding voltage calculated in the welding current voltage calculation process, the initial value is set according to the gap (G) between the upper welding base material and the lower welding base material and the thickness of the welding base material, the upper welding base material and the lower welding By the gap G between the base materials, at least one of the welding current, the welding voltage, the wire supply speed, the traveling speed, the stopping time at the node, the weaving speed, and the weaving width is controlled in real time.

In the above, the stop time at each node computed in the stop time calculation process is the side of the rear bead B which performs welding to the inside of the improved surface when the total stop time for the generation of beads without defects is T1. The stopping time of each node between the node, the back bead (B) and the surface bead (F) has a stopping time of 0.2 * T1 in the error range of ± 10%, and the stopping time at the node of the surface bead (F) It has a stop time of 0.8 * T1 in an error range of ± 10%.

The method may further include a wire supply speed setting process of calculating a wire supply speed for supplying an appropriate amount of wire for welding during movement between each node and each node, wherein the wire calculated in the wire supply speed setting process. The feed rate is set by the gap G between the upper welding base material and the lower welding base material at an initial value at the node for setting the back bead B between the upper welding base material and the lower welding base material. And nodes located between the nodes forming the surface beads F and the surface beads F are calculated to increase from the initial value in proportion to the vertical width of the cross section of the improvement surface.

The horizontal butt joint welding device and method according to the present invention can complete horizontal butt welding by one or two pass welding, regardless of the thickness of the base material, thereby significantly reducing the number of passes of the horizontal butt joint welding. This can significantly increase the speed of the welding operation.

In addition, the present invention, by controlling the voltage, current, wire supply speed and stop time in proportion to the cross-sectional width of the improved surface during the weaving welding and diagonal running welding, there is no defect welding in the interior and the surface of the weld end surface By making it possible, the welding quality can be significantly improved.

In addition, the present invention by spraying the gas to the molten metal in the forward direction of the welding direction to the copper alloy, to prevent the molten metal flowing down, and easy to handle the equipment and reduce weight as compared to the reverse gas injection structure By forming an asymmetrical bottom groove on the copper immersion surface, it is possible to complete the surface bead by filling the lower part of the metal.

1 is a view showing a welding state after the root pass in the conventional automatic welding,

Figure 2 shows a conventional welding tip,

3 is a cross-sectional view of welds by a conventional welding apparatus,

4 is an exploded perspective view of a horizontal butt joint welding device according to an embodiment of the present invention,

5 is a plan view of a horizontal butt joint welding device according to an embodiment of the present invention,

6 is a right side view of a horizontal butt joint welding device according to an embodiment of the present invention,

7 is a perspective view of a copper alloy according to an embodiment of the present invention,

Figure 8 is a side cross-sectional view showing a conventional copper alloy,

9 is a side cross-sectional view showing a copper alloy according to an embodiment of the present invention,

10 is a cross-sectional view of a welding torch according to one embodiment of the present invention;

11 is a block diagram showing a schematic configuration of a horizontal butt joint welding device according to an embodiment of the present invention,

12 is a flowchart illustrating a horizontal butt joint welding method according to an embodiment of the present invention,

FIG. 13 illustrates a movement control state of a controller for a special weaving pattern according to an embodiment of the present invention.

14 is a graph showing the welding conditions at each node of the special weaving pattern according to an embodiment of the present invention,

15 illustrates a weaving motion by the orthogonal weaving shaft part according to an embodiment of the present invention.

16 illustrates a welding motion and a wire in a driving direction according to an embodiment of the present invention.

17 and 18 are cross-sectional views of a welded part by a horizontal butt joint welding device according to an embodiment of the present invention.

Hereinafter, the technical configuration of the horizontal butt joint welding welding apparatus and method according to the accompanying drawings in detail as follows.

4 to 18, the horizontal butt joint welding device 100 according to an embodiment of the present invention is a welding tip 32 to improve the upper welding base material (1a) and lower welding base material (1b) A traveling mechanism 9 for conveying in the vertical and oblique directions with respect to it, a welding tip 32, and a welding torch 8 mounted on the traveling mechanism 9 and a welding tip 32 to be positioned in the welding direction by the welding tip 32. The improvement surface of the horizontal butt joint so as to maintain a constant welding amount in which the copper filler 4 mounted on the traveling mechanism part 9 and the macro section 53 on which the welding surface is not formed on the upper welding base material 1a is maintained. A welding machine for supplying welding voltage and current to the control unit 60 for controlling welding conditions for each position, the display unit 63 for displaying a welding state, the setting unit 64 for setting welding parameters, and the welding torch 8 ( 68).

In the following description, the " vertical and vertical directions " in FIG. 4 are in the x-axis direction, the " sliding conveying direction in the traveling mechanism " is in the y-axis direction, and the " direction toward the welding surface " is the z-axis direction. For ease of explanation, each direction is indicated in the x-y-z direction.

The driving mechanism 9 has a driving shaft 40 which is slidably connected along the guide rail R. The traveling shaft part 40 functions as a carrier which conveys the welding torch 8 and the copper filler 4 in the y-axis direction. A torch x-axis slide assembly 91 for driving the welding torch 8 in the x-axis direction is coupled to the travel shaft 40. The torch x-axis slide assembly 91 is coupled to the torch y-axis slide assembly 88 for driving the welding torch 8 in the y-axis direction, and the torch y-axis slide assembly 88 is connected to the torch y-axis slide assembly 88 by z. A torch z-axis slide assembly 89 for driving in the axial direction is engaged.

In addition, the orthogonal weaving shaft portion 41 is coupled to the torch y-axis slide assembly 89, and the worm slide assembly 87 is coupled to the orthogonal weaving shaft portion 41. The worm slide assembly 87 is connected to the orthogonal weaving shaft portion 41 and slides in the y-axis and z-axis directions. An angle slide assembly 86 is connected to the worm slide assembly 87, and the worm slide assembly 87 rotates the angle slide assembly 86 about the angle axis 865 shown in FIG. Let's do it. By adjusting the spring installed inside the angle slide assembly 86 with the handle is made sliding in the x-axis and y-axis direction. The welding torch 8 is coupled to the angle slide assembly 86. In addition, the sensor shaft 61 and the control box 85 is mounted on the travel shaft 40.

Copper plate 4 is mounted to the driving mechanism 9, more specifically, the copper drive assembly assembly 80 is coupled to the driving shaft portion 40 of the driving mechanism 9, the copper charge 4 is moved It is connected to the immersion drive assembly 80. The gilding drive assembly 80 is largely comprised of a gilding x-axis slide assembly 83 and a gilding z-axis slide assembly 84. The immersion x-axis slide assembly 83 is fixedly coupled to the driving shaft portion 40 and slides along the guide rail R in the y-axis direction, thereby sliding the immersion 4 in the x-axis direction. The immersion z-axis slide assembly 84 is connected to the immersion x-axis slide assembly 83 and is slidable in the x-axis direction. The duct 4 is connected to the duct z-axis slide assembly 84. As a result, the copper foil 4 is moved along the guide rail R in the y-axis direction, slidable in the x-axis direction, and movable in the z-axis direction to be in close contact with the base material direction.

Copper filler 4 has a function to flow the cooling water so that molten metal and slag does not leak during welding. That is, the copper thin film 4 is capable of large welding by preventing molten water from flowing down to the surface even if the welding amount is increased, and the welding defect is prevented by improving the welding quality by completing a small number of passes during automatic welding. And shorten the working time. The copper filler 4 is formed with a gaseous outlet 21a for injecting the forward gas into the forward gas injection portion 21 and the forward gas in the welding advancing direction. The copper filler 4 is mounted to the welding apparatus 100 to inject a protective gas in the welding progress direction, and is in close contact with the contact portion where the upper welding base material 1a and the lower welding base material 1b to be welded are brought into the molten water. Prevents the ingress of outside air, which degrades the weld mechanical properties. The welding tip located at the end of the welding torch 8 has an outer diameter of 8 mm or less, preferably 5 mm or less. And an insulating coating layer 33 such as ceramic formed on the outer circumferential surface of the welding torch 8. The welding torch 8 has a small outer diameter, and an insulating coating layer 33 is formed on the surface thereof, so that the welding tip is small, so that smooth welding can be performed inside the improvement, and the insulation coating layer 33 is in contact with the welding tip 32 and the improvement surface. It is possible to make continuous welding by preventing short from occurring.

As described above, the traveling mechanism 9 includes a traveling shaft 40 for moving the welding apparatus 100 along the guide rail R, and the welding torch 8 in the vertical direction of the guide rail R. Orthogonal weaving shaft portion 41 for performing the weaving motion to transfer in the vertical direction of the improved surface, and the sensor unit 61 for detecting the welding current and the welding voltage. The traveling shaft driver 40 is provided with a traveling motor driver 65, and the orthogonal weaving shaft part 41 is provided with a weaving motor driver 66. In addition, the sensor unit 61 is provided with a welding current detection sensor 61a for detecting a welding current and a welding voltage detection sensor 61b for detecting a welding voltage.

Also, the welding current and welding voltage of the welding machine 68 are received by receiving the welding condition control signal transmitted from the controller 60 based on the detection values received by the welding current detection sensor 61a and the welding voltage detection sensor 61b. Welding condition control unit 69 for controlling the is provided.

The controller 60 has a special weaving pattern 7 by controlling the arc, voltage, current, travel shaft movement, stop time, and wire feed speed generated by the welding torch 8 for each position of the improved surface. Weld welding is performed to include a root pass by one pass welding without separately performing root pass welding (superlayer welding) to form a root portion for the gap formed between the two base materials 1 (1a, 1b). 50% or more of the total improvement area, preferably 80% or more can be welded.

At the same time as performing the control to enable the welding welding in the first pass welding, the control unit 60 additionally corresponds to various gap changes and the wire resistance difference through the change of the wire protrusion length 12 which is varied. The variation of the output welding current and voltage generated by the detection is detected by the welding current detection sensor 61a and the welding voltage detection sensor 61b and displayed on the display unit 63. In addition, the control unit 60 controls the driving motor driving unit 65 and the weaving motor driving unit 66 to change the actual traveling speed 13 of the welding apparatus 100 so as to maintain a constant deposition amount per unit volume.

In this case, the setting unit 64 may select whether or not the actual traveling speed is changed through arc sensing. In the case of performing welding under constant welding conditions (current, voltage, welding speed), when the gap becomes larger, that is, when the improvement unit volume is increased, the weld unit is less filled with the improved unit volume due to the increased welding amount due to the constant welding condition. The distance between the point and the tip of the weld tip, i.e. the length of the wire projection 12, becomes long. As a result, output current and voltage values of the welding current detection sensor 61a and the welding voltage detection sensor 61b are reduced by -ΔA and -ΔV. The controller 60 adjusts the traveling motor driving unit 65 and the weaving motor driving unit 66 to reduce the traveling speed of the traveling mechanism unit 9 to increase the amount of welding per unit volume. Is reduced again, and the output current and the voltage value coming into the welding current detection sensor 61a and the welding current detection sensor 61b are increased by + ΔA and + ΔV again to maintain a constant deposition amount per unit volume.

In particular, the copper filler 4 has a forward gas injector for injecting gas in the welding advancing direction. That is, the copper filler 4 is formed with a gaseous outlet 21a for injecting the forward gas in the forward direction and the forward gas injection portion 21, and in the welding progress direction. It is configured to prevent the surface from flowing down.

This structure is comparable to the structure of injecting reverse gas, while the structure of injecting reverse gas requires three gas connection lines, so the handling of equipment is inconvenient and the weight is increased, while the forward gas injection structure is one gas connection. Only the lines are required, so machine handling is easy and weight is reduced.

Referring to FIG. 5, the copper filler 4 has a coolant inlet 401 for introducing coolant and a coolant outlet 402 for discharging the coolant. In addition, a concave concave recess 215 is formed in one surface of the copper thin film 4 through which the forward gas is injected. One surface of the copper foil 4 in which the concave groove 215 is formed is in close contact with the surface of the base material. The concave groove 215 is asymmetrical in the vertical direction, the receiving groove 217 is further formed to fill the lower portion of the concave groove 215. That is, as shown in FIG. 9, the concave groove 215 forms an accommodating groove 217 recessed concave in a stepped shape in the lower portion to form an asymmetric shape in the vertical direction.

More specifically, the copper foil 4 is formed in a substantially square plate shape to be in close contact with the surface of the base material, and the recessed groove 215 is recessed to cover the improvement surface of the base material in the vertical direction on the surface facing the surface of the base material. Is formed. In the lower portion of the concave groove 215 is formed in the stepped shape accommodating groove 217 for accommodating waste water is further concaved from the concave groove 215. The gas inlet 21a is formed in the recessed groove 215. The recessed groove 215 extends in the conveying direction of the traveling mechanism part.

Compared with the structure of the recessed groove 301 formed in the conventional copper thin film 300 shown in FIG. 8, the structure of FIG. 8 is incomplete in surface beads, while the structure of FIG. 9 has a receiving groove 217. ) The molten metal is filled to achieve a satisfactory surface bead.

On the other hand, the horizontal butt joint welding method according to an embodiment of the present invention is a traveling mechanism (9) having a orthogonal weaving shaft portion 41 and the running shaft portion 40, copper alloy 4 and the welding torch (8) And by using the horizontal butt joint welding device 100 having the control unit 60, the first layer welding is performed on the upper welding base material 1a and the lower welding base material 1b having no improvement. Performs a horizontal butt joint weld without

Horizontal butt joint welding method according to an embodiment of the present invention, the control unit 60 is based on the gap (G) between the two base material is determined according to the thickness of the two base material (1), weaving driving welding and oblique line A plurality of nodes (first node P1 to fifth node P5) of special weaving pattern welding, which performs stop welding with stop time at each node, is formed by forming a plurality of nodes that divide a path for traveling welding. )), The welding voltage, the welding current, and the surface bead F to the initial values at the two nodes (first node P1 and fifth node P5) performing welding at the position where the rear bead B is formed. ) Nodes (3rd node (P3)) at the formation position, nodes (1st node (P1) and 5th node (P5)) and surface bead (F) formation positions respectively at the two rear bead (B) formation positions Calculated from the relationship to the initial value in the plurality of divided nodes (second node P2 and fourth node P4) between the nodes of the third node (third node) A welding current voltage calculation process of calculating a contact voltage and a welding current value and transmitting the same to the welder 68; The stop time calculation process of the controller 60 calculating the stop time at each of the first nodes P1 to the fifth nodes P5 based on the gap G between the two base materials 1a and 1b. and; And a welding welding process for performing the welding welding by the special weaving pattern by the stop time at each node, the welding current and the welding voltage calculated between the nodes and the nodes.

An initial value of the welding current and the welding voltage calculated in the welding current voltage calculation process is set according to the width of the gap G, and two nodes (first node P1 and fifth) forming the back bead B are formed. It is varied so as to increase in proportion to the cross-sectional vertical width of the improved surface of the node (third node P3) forming the surface bead F at the node P5).

In addition, the stop time at each node calculated during the stop time calculation process is performed by preheating at two nodes (first node P1 and fifth node P5) for the formation of the rear bead B. When the stop time for generating the defect-free beads is T1, two nodes (first node P1 and fifth node) for forming the rear bead B, which performs welding on the inside of the improved surface, P5)) The stop time (T2 and T4) at each node between each and the node for forming the surface bead (F) has a stop time of 0.2 * T1 in the error range of about ± 10%, the surface bead The stop time at the node (F) has a stop time of 0.8 * T1 in the error range of about ± 10%.

In addition, the horizontal butt joint welding method further includes a wire feed rate setting process for calculating a wire feed rate for supplying an appropriate amount of wire for the welding during movement between each node and each node.

The wire feed rate calculated in the wire feed rate setting process is the initial value at the node for setting the back bead (B) is set by the gap (G), the node forming the back bead (B) and the surface bead (F) Nodes located between are calculated to increase from the initial value in proportion to the vertical width of the cross section of the improvement surface.

The welding process of primary welding is the primary pass welding in the improvement of the welding process surface without performing the root pass welding (straight-layer welding) to match the step between the upper welding base material and the lower welding base material on the opposite side of the welding process surface. Do it yourself.

That is, in the welding welding process, welding is controlled to have different stop time, voltage, current, and wire supply speed for each node, and the moving speed between the nodes has a value that varies depending on the width of the gap G. Is controlled. Whether the welding condition is satisfied at each node or weld is determined by the welding current and the welding voltage detected by the welding current detection sensor 61a and the welding voltage detection sensor 61b. And the stop time at each node and the movement between nodes are performed by the traveling motor driver 65 and the weaving motor driver 66. Further, each welding current, welding voltage and wire supply speed are controlled by the controller 60 controlling the welder 68.

The special weaving pattern 7 is made through the combination of the orthogonal weaving shaft portion 41 and the traveling shaft portion 40 located inside the welding apparatus 100. The special weaving pattern 7 has only the orthogonal weaving shaft portion 41 in the section of the first node P1, which is the first root portion, and the second node P2, which is the first middle portion, and the third node P3, which is the surface portion. Ortho weaving in the section between weaving moving in the Y-axis direction and third node P3, which is the surface portion, and fourth node P4, which is the second middle portion, and fifth node P5, the second route portion. The shaft portion 41 and the traveling shaft portion 40 simultaneously operate to include diagonal traveling (Traveling) to be carried in the diagonal direction.

Then, the stopping time (T) to stop for the generation of a certain amount of deposition at each node, the feed rate (S) between each node is a constant size proportional to the width of the gap (G) determined according to the thickness of the base material The welding current and the welding voltage have a minimum value at the first node P1 and the fifth node P5 that form the back bead B, and the third node that forms the surface bead F. It has the maximum value in P3). In addition, the nodes located at a position between each of the first node P1 and the fifth node P5 forming the rear bead B and the third node P3 setting the surface bead F are improved surfaces. It is set to have a size proportional to the width of the cross section.

In order to perform horizontal butt joint welding by the special weaving pattern 7, between the lower welding base material 1b and the upper welding base material 1a by forming an inclined surface on the bottom surface of the upper welding base material 1a. The improvement as a welding part is formed.

An example of welding condition control for each node in horizontal butt joint welding using a special weaving pattern 7 having five nodes P1 to P5 for two 23 mm thick base metal plates is as follows. The first node P1 and the fifth node P5 in which the rear bead B is formed have a stop time of 1 second for preheating. In addition, the second node P2 and the fourth node P4, which perform welding to the inside of the improved surface, have a stopping time of 0.2 seconds, and the third node P3, which becomes the surface bead F, has a preheating and a large capacity. The stop time is about 0.8 seconds to form the molten metal.

In addition, the welding current IR and the welding voltage VR of the first node P1 and the fifth node P5 are respectively 263A and 31.2V, and the second node P2 and the second node in the error range of about ± 10%. The welding current IM and the welding voltage VM of the four nodes P4 are 359A and 33.2V respectively, and the welding current IF and the welding voltage VF of the third node P3 are within an error range of approximately ± 10%. Each is controlled to have 421A and 35.7V in an error range of approximately ± 10%. In addition, the moving speed between each node P1 to P5 is kept constant at 2 cm / sec, which increases in size to have a constant speed value in proportion to the gap G (or the width of the improvement face).

In addition, the wire supply speed between each node (P1 ~ P5), the wire supply speed (WR) between the first node (P1) and the second node (P2) is 1028cm in the error range of about ± 10% / min, the wire feed speed (WM) between the second node (P2) and the third node (P3) is 1727 cm / min in the error range of about ± 10%, the third node (P3) and the fourth node (P4) The wire feeding speed (WF) between 2139cm / min in the error range of about ± 10, the wire feeding speed (WM) between the fourth node (P4) and the fifth node (P5) is about ± 10% At 1727 cm / min. In addition, the carriage running speed averages about 10.6 cm / min from the first node P1 to the fifth node P5.

The upper welding base material 1a and the lower welding base material 1b are arranged to form a gap G having a width corresponding to the thicknesses of the base materials 1a and 1b, and then based on the formed gap G, a welding current By performing the voltage calculation process (S10), the stop time calculation process (S20) and the Yy supply speed calculation process (S30), the welding current, welding voltage, wire supply speed, After the traveling mechanism moving speed is calculated and the like, the welding process S100 is performed.

In the welding process, the stopping time is longest at the positions of the nodes (first node P1 and second node P5) forming the rear bead B, and a large amount of molten metal is formed, thereby forming a root. Even if pass welding is not performed, a good quality back bead B without defects can be formed.

When performing a horizontal butt joint welding by applying a welding method to the horizontal butt joint welding device 100, the molten metal 56 by having a stop time at each of the first to fifth nodes P1 to P5, respectively. Is formed. In this case, the supplied welding current and the welding voltage are calculated by the welding current voltage calculation process according to the thicknesses of the upper welding base material 1a and the lower welding base material 1b. When the welding current and the welding voltage are calculated in the welding current voltage calculation process S10, the moving speed between the nodes is also calculated.

The special weaving pattern 7 is performed by freeing the welding tip of the welding tip by forming an insulating coating layer 33 on the outer circumferential surface and minimizing the diameter of the welding tip 32 in the welding torch 8 of the present invention. Even when the welding base material 1a or the lower welding base material 1b and the welding tip 32 come into contact with each other, it is possible to prevent the generation of the arc by the insulation. That is, the performance of the special weaving pattern 7 is difficult to carry out the welding tip 32 when the welding torch 8 of the present invention is not applied, and the non-insulated welding tip 32 is formed with the upper welding base material 1a. When it comes in contact with the lower welding base material 1b, the arc generation stops and cannot be easily executed.

Next, while the welding process is performed, the gas is injected into the molten metal 56 by the copper filler 4 under the control of the controller 60. The copper immersed in the welding direction in consideration of the amount of molten metal generated by the control unit 60 using the welding current, welding voltage, traveling control information of the orthogonal weaving shaft portion 41 and the traveling shaft portion 40. Spray in the forward direction. After the molten metal 56 is formed, the moving direction, speed, and stopping time of the orthogonal weaving shaft part 41 and the traveling shaft part 40 are controlled according to the stop time calculated by the stop time calculation process and the moving speed between the nodes. By generating an arc according to the welding current and voltage at the welding position, respectively, welding along the special weaving pattern 7 is performed between the upper welding base material 1a and the lower welding welding base material 1b.

That is, in the case of performing a horizontal butt joint welding of two base materials by a horizontal butt joint welding method in which the welding condition control of the special weaving pattern 7 of the present invention is performed, the welding current, the welding voltage, the stopping time, Wire supply speed, travel speed, etc. are calculated to perform 50% to 100% welding of the welded portion by one pass welding. Therefore, in the present invention, in performing horizontal butt joint welding, by performing an initial large welding, which is a primary pass welding inside an improved surface, without performing a root pass welding (superlayer welding), FIGS. 17 and 18. As shown in the present invention, it is possible to perform 50% to 100% high welding welding having a good quality of the back beads B and the surface beads F by one welding. Accordingly, since only the welding of the remaining 50% to 0% portion needs to be performed, the horizontal butt joint welding can be performed in one pass or two passes, thereby significantly reducing the number of passes of the horizontal butt joint welding.

Until now, the horizontal butt joint welding apparatus and method according to the present invention have been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. I will understand the point. Therefore, the true technical protection scope should be defined by the technical spirit of the appended claims.

Claims (13)

1. A traveling mechanism unit for repeatedly weaving and transporting the welding tip periodically in a specific direction with respect to the improvement of the upper welding base material and the lower welding base material, a welding torch equipped with the welding tip mounted on the traveling mechanism part, and a welding direction by the welding tip And a control unit for controlling welding conditions for each of the unsealed positions of the welding torch, taking into account the copper alloy mounted on the driving mechanism to be positioned and the horizontal weld joint improving shape.

   The control unit,

   The driving mechanism is transferred to weaving along a plurality of nodes, and at least one of welding current, welding voltage, wire supply speed, traveling speed, stopping time at the node, weaving speed, and weaving width in the moving section between the nodes. Horizontal butt joint welding device characterized in that it is configured to perform a welding welding on the improved surface by controlling the.
2. According to claim 1,

   The copper filler is provided with a forward gas injection unit for injecting gas in the welding progress direction, horizontal butt joint welding device characterized in that configured to prevent the surface of the molten metal flowing down.
3. According to claim 1,

   The initial value is set according to the gap G between the upper welding base material and the lower welding base material and the thickness of the welding base material, and the welding current, the welding voltage, and the wire supply speed by the gap G between the upper welding base material and the lower welding base material. Horizontal butt joint welding device characterized in that at least one of the running speed, stop time at the node, weaving speed, weaving width is controlled in real time.
4. According to claim 1,

   The stopping time at the node is

   If the total downtime for the generation of defect free beads is T1,

   The stop time of each node of the back bead (B) performing the welding to the inside of the improved surface, and the nodes between the back bead (B) and the surface bead (F) is 0.2 * T1 in the tolerance range of ± 10%. And a stop time at the surface bead (F) side node has a stop time of 0.8 * T1 in an error range of ± 10%.
5. According to claim 1,

   The wire feed rate is,

   The initial value at the node for setting the back bead B is set by the gap G, and at nodes located between the node for forming the back bead B and the surface bead F, A horizontal butt joint welding device characterized in that it is calculated to increase from the initial value in proportion to the vertical width of the cross section.
6. According to claim 1,

   The control unit,

   Welding current, welding voltage, wire supply speed, travel speed, stop time at node, weaving speed, to maintain a constant welding amount per unit volume by using at least one of current and voltage value of current or voltage detection sensor. Horizontal butt joint welding device characterized in that for controlling at least one of the width of the weaving.
7. According to claim 1,

   A horizontal butt joint is formed on one surface of the copper sluice, and the recess groove is formed in a streamline shape, and the recess groove is asymmetrical in the vertical direction and the receiving groove is further formed to fill the lower portion of the recess groove. Welding welding equipment.
8. The method of claim 7, wherein

   The copper alloy is formed in a plate shape that is in close contact with the surface of the base material, the groove is formed in the groove in contact with the surface of the base material to cover the improved surface of the base material in the vertical direction, the recess groove is the conveying direction of the driving mechanism portion It is formed to extend, the receiving groove formed in the lower portion of the recess groove is a horizontal butt joint welding device characterized in that the recess is formed in a stepped shape in the recess groove to accommodate the water.
9. According to claim 1,

   A copper x-axis slide assembly coupled to the travel shaft of the travel mechanism;

   A z-axis slide assembly which is connected to the copper x-axis slide assembly and slides in a vertical direction,

   The copper filler is connected to the copper alloy z-axis slide assembly, the horizontal butt joint welding device characterized in that the moving direction of the traveling mechanism, the vertical direction of the base material, and in close contact with the base material.
10. A traveling mechanism unit for repeatedly weaving and transporting the welding tip periodically in a specific direction with respect to the improvement of the upper welding base material and the lower welding base material, a welding torch equipped with the welding tip mounted on the traveling mechanism part, and a welding direction by the welding tip. And a control unit for controlling welding conditions for each of the welding positions of the welding torch in consideration of the shape of the horizontal welding joint and the improvement of the horizontal welding joint to be positioned, wherein the copper plating moves in the welding progress direction and the surface of the molten metal. In the welding method using a horizontal butt joint welding device configured to prevent falling,

    A welding current calculation process or a welding voltage calculation process in which the control unit calculates a welding current or a welding voltage in a moving section between the nodes;

    A stop time calculation process or a travel speed calculation process, wherein the control unit calculates a stop time or a travel speed at each node;

    The control unit controls the welder and the traveling mechanism according to the welding current for each node and the movement interval between the nodes calculated during the welding current voltage calculation process, the stopping time or the traveling speed for each node calculated in the calculation process of the welding current and the stop time. A welding method using a horizontal butt joint welding device, comprising: a welding process for welding a weld to an improved surface without performing root pass welding.
11. The method of claim 10,

    Welding current and welding voltage calculated in the welding current voltage calculation process,

    The initial value is set according to the gap G between the upper welding base material and the lower welding base material and the thickness of the welding base material, and the welding current, the welding voltage, and the wire supply speed by the gap G between the upper welding base material and the lower welding base material. Welding method using a horizontal butt joint welding device characterized in that at least one of the running speed, stop time at the node, weaving speed, weaving width is controlled in real time.
12. The method of claim 10,

    The stop time at each node calculated in the stop time calculation process,

    If the total downtime for the generation of defect free beads is T1,

    The stop time of each node of the back bead (B) performing the welding to the inside of the improved surface, and the nodes between the back bead (B) and the surface bead (F) is 0.2 * T1 in the tolerance range of ± 10%. And a stop time at the surface bead (F) side node has a stop time of 0.8 * T1 in an error range of ± 10%.
13. The method of claim 10,

    And a wire feed rate setting process for calculating a wire feed rate for supplying an appropriate amount of wire for welding during movement between each node and each node,

    The wire feed rate calculated in the wire feed rate setting process,

    The initial value at the node for setting the back bead B between the upper welding base material and the lower welding base material is set by the gap G between the upper welding base material and the lower welding base material.

    Horizontal butt joint welding device characterized in that the nodes located between the nodes forming the rear bead (B) and the surface bead (F) is calculated to increase from the initial value in proportion to the vertical width of the cross section of the improved surface Welding method using.

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